Lactobacillus gasseri

BACKGROUND & AIM: The gut-brain axis is one of the proposed interactions between the brain and peripheral intestinal functions; of particular interest is the influence of food components on the gut-brain axis mediated via the gut microbiome. Probiotics and paraprobiotics have been proposed to interact with the intestinal environment and provide health benefits such as improving sleep quality. The aim of this research was to undertake a systematic literature review and meta-analysis to evaluate the current evidence regarding the effects of Lactobacillus gasseri CP2305 on sleep quality for the general population. METHODS: A systematic literature search was conducted of peer-reviewed articles published up to 04 November 2022. Randomised controlled trials were identified that investigated the effects of Lactobacillus gasseri CP2305 on sleep parameters in adults. Meta-analysis of the change in the Pittsburgh Sleep Quality Index (PSQI) global score was conducted. Quality assessments of individual studies were conducted using the Cochrane Risk of Bias and Health Canada tools. RESULTS: Seven studies were included in the systematic literature review; six studies included data for meta-analysis to quantify the effect of L. gasseri CP2305 on sleep quality. The ingestion of L. gasseri CP2305 resulted in significant improvement in the PSQI global score compared to control (-0.77, 95% CI: -1.37 to -0.16, P = 0.01). In the two studies that included electroencephalogram (EEG) data, output was significantly improved for at least half of the measured EEG outcomes after consumption of L. gasseri CP2305. No serious concerns were found in the potential biases of included studies, indirectness of the included evidence, and other methodological issues. CONCLUSION: The present systematic review and meta-analysis indicates significant improvement in sleep quality of adults with mild to moderate stress as an effect of daily consumption of L. gasseri CP2305. Based on existing evidence, the relationship between L. gasseri CP2305 and enhanced sleep quality is plausible, however further investigations are required to confirm the mechanisms of actions for this effect.

We aimed at assessing the evidence for an effect on vaginal dysbiosis by oral administration of a mixture of Lactobacillus strains isolated from vaginal microbiota. For this purpose, we systematically reviewed the literature for randomised clinical trials (RCTs) in which the effect of oral administration of a mixture of four Lactobacillus strains (Lactobacillus crispatus LbV 88 (DSM 22566), Lactobacillus gasseri LbV 150N (DSM 22583), Lactobacillus jensenii LbV 116 (DSM 22567) and Lactobacillus rhamnosus LbV96 (DSM 22560)) on vaginal dysbiosis was examined based on Nugent score. Four RCTs were identified: a double-blind (DB)-RCT in 60 male-to-female transsexual women with neovagina; an open label RCT in 60 pregnant women with herpes virus infection; a DB-RCT in 36 women with bacterial vaginosis; a DB-RCT in 22 postmenopausal breast cancer patients receiving chemotherapy. Only in the three DB-RCTs Nugent score was assessed. The meta-analysis of these trials showed a significant reduction of Nugent score by probiotics compared to placebo in the fixed (standardised mean differences (SMD) -0.561; confidence interval (CI) -0.935 to -0.186; P=0.004 and random effect models (SMD -0.561; CI -0.935 to -0.186; P=0.004). The odds ratio (OR) of the cases presenting with improved Nugent score after probiotics compared to placebo treatment showed a significant effect in the fixed (OR=3.936; CI 1.702 to 9.100; P=0.001) and random effect model (OR=3.902; CI 1.681 to 9.059; P=0.001) Cochran's Q and I2 statistics showed no heterogeneity. This meta-analysis indicates that the oral intake of the pertinent Lactobacillus strains improves the microbial pattern in vaginal dysbiosis.

BACKGROUND: Previous meta-analyses reported that probiotics improve the effectiveness of Helicobacter pylori (H. pylori) eradication during antibiotic therapy, while results regarding a possible reduction of side effects remained inconclusive. Moreover, the effectiveness of different strains of probiotics has not been studied so far. It is further conceivable that probiotics will produce additional effects only if antibiotics are relatively ineffective. METHODS: This meta-analysis includes eligible randomized controlled trials examining effects of probiotics supplementation on eradication rates (ER) and side effects, published up to May 2014. Sub-group analysis was performed to compare different probiotic strains and antibiotic therapies with different effectiveness in controls (ER <80% vs.>80%). Publication bias was assessed with funnel plots and Harbord's test. The quality of the trials was assessed with the Cochrane risk of bias tool. RESULTS: Thirty-three RCTs involving a total of 4459 patients met the inclusion criteria in case of eradication rates of which 20 assessed total side effects in addition. Overall, the pooled eradication rate in probiotics supplementation groups was significantly higher than in controls (ITT analysis: RR 1.122, 95% CI 1.086-1.159, PP analysis: RR 1.114, 95% CI 1.070-1.159). Sub group-analysis could, however, confirm this finding only for four individual strains (Lactobacillus acidophilus, Lactobacillus casei DN-114001, Lactobacillus gasseri, and Bifidobacterium infantis 2036) and for relatively ineffective antibiotic therapies. There was a significant difference between groups in the overall incidence of side effects (RR 0.735, 95% CI 0.598-0.902). This result was, however, only confirmed for non-blinded trials. CONCLUSIONS: The pooled data suggest that supplementation with specific strains of probiotics compared with eradication therapy may be considered an option for increasing eradication rates, particularly when antibiotic therapies are relatively ineffective. The impact on side effects remains unclear and more high quality trials on specific probiotic strains and side effects are thus needed.

BACKGROUND: Obesity is associated with alteration of the gut microbiota. In order to clarify the effect of Lactobacillus-containing probiotics (LCP) on weight we performed a meta-analysis of clinical studies and experimental models. We intended to assess effects by Lactobacillus species. METHODS: A broad search with no date or language restriction was performed. We included randomized controlled trials (RCTs) and comparative clinical studies in humans and animals or experimental models assessing the effect of Lactobacillus-containing probiotics on weight. We primarily attempted to extract and use change from baseline values. Data were extracted independently by two authors. Results were pooled by host and by Lactobacillus species and are summarized in a meta-analysis of standardized difference in means (SMDs). RESULTS: We identified and included 17 RCTs in humans, 51 studies on farm animals and 14 experimental models. Lactobacillus acidophilus administration resulted in significant weight gain in humans and in animals (SMD 0.15; 95% confidence intervals 0.05-0.25). Results were consistent in humans and animals. Lactobacillus fermentum and Lactobacillus ingluviei were associated with weight gain in animals. Lactobacillus plantarum was associated with weight loss in animals and Lactobacillus gasseri was associated with weight loss both in obese humans and in animals. CONCLUSIONS: Different Lactobacillus species are associated different effects on weight change that are host-specific. Further studies are needed to clarify the role of Lactobacillus species in the human energy harvest and weight regulation. Attention should be drawn to the potential effects of commonly marketed lactobacillus-containing probiotics on weight gain.

The investigation and development of novel antimicrobial compounds are central focuses of medical research. In this study, we evaluated benzimidazoles and benzothiazoles derivatives, and biosurfactants produced by Lactobacillus jensenii P6A and Lactobacillus gasseri P65 as potential antimicrobial agents against the Candida tropicalis, C. albicans, and C. krusei, Enterobacter aerogenes, Escherichia coli, Klebsiella pneumoniae, and Staphylococcus saprophyticus. Several biomolecules exhibited antimicrobial activity against clinical isolates of E. coli and C. albicans, with MIC values of 16 µg mL-1, and against S. saprophyticus, E. aerogenes, and K. pneumoniae, with MICs less than 128 µg mL-1. Six azole compounds exhibited antimicrobial activity against C. albicans and E. coli, with MIC values ranging from 64 to 128 µg mL-1, and five showed activity against Candida spp. and A. niger. Both biomolecules also exhibited an antiadhesive effect at varying concentrations, being most efficient against E. aerogenes (64% for the P6A biosurfactant), E. coli (46.4% for the P65 biosurfactant), and S. saprophyticus (39% for the P65 biosurfactant). Azole compounds I06, I16, I17, T04, and T17 were evaluated for their combined antimicrobial effects with biosurfactants against E. coli and C. albicans. In general, these compounds showed a synergistic effect in vitro. Additionally, in vitro cytotoxicity against two cell lines, HL6 tumor cells and normal VERO cells, was assessed. The benzimidazole derivatives I06 and I17 exhibited cytotoxic activity against HL6 tumor cells, with 50% inhibition of cell viability at 6.25 µg mL-1 and 12.5 µg mL-1, respectively. Furthermore, compound I06 was active in all tested cell lines, showing less than 20% inhibition of cell proliferation in VERO cells, suggesting low toxicity. The biosurfactants did not inhibit the growth of either tumor or normal cells. In this context, the development of benzazole derivatives represents a promising alternative for the design of effective antimicrobial agents. The synergistic and cytotoxic effects of the tested compounds were assessed in vitro, with preliminary safety conclusions drawn solely from Vero cell data.

Conjugated estrogens (CE) and Bazedoxifene (BZA) combination is used to alleviate menopause-associated symptoms in women. CE+BZA undergo first-pass-metabolism in the liver and deconjugation by gut microbiome via β-glucuronidase (GUS) enzyme inside the distal gut. To date, the impact of long-term exposure to CE+BZA on the gut microbiome or GUS activity has not been examined. Our study using an ovariectomized mouse model showed that CE+BZA administration did not affect the overall cecal or fecal microbiome community except that it decreased the abundance of Akkermansia, which was identified as a fecal biomarker correlated with weight gain. The fecal GUS activity was reduced significantly and was positively correlated with the abundance of Lactobacillaceae in the fecal microbiome. We further confirmed in Escherichia coli K12 and Lactobacillus gasseri ADH that Tamoxifen-, 4-hydroxy-Tamoxifen- and Estradiol-Glucuronides competed for GUS activity. Our study for the first time demonstrated that long-term estrogen supplementation directly modulated gut microbial GUS activity. Our findings implicate that long-term estrogen supplementation impacts composition of gut microbiota and microbial activity, which affects estrogen metabolism in the gut. Thus, it is possible to manipulate such activity to improve the efficacy and safety of long-term administered estrogens for postmenopausal women or breast cancer patients.

We have evaluated the herb-drug interaction potential of Ssang-hwa-tang (SHT) mediated by cytochrome P450 (CYP) inhibition/induction. Further, the effects of fermentation on the CYP-mediated herb-drug interaction potential were determined. SHT showed inhibitory activity toward CYP1A2, but not 2A6, 2B6, 2C9, 2C19, 2D6, 2E1, and 3A4 in human liver microsomes. The results of the enzyme kinetic study suggested that the SHT-induced CYP1A2 inhibition is mixed reversible inhibition. The hepatic CYP expression and activity in rats treated with SHT were examined. The expression/activity of CYP2E1 increased as a result of SHT extract treatment (P<0.005 or P<0.001, respectively), which raises the possibility that SHT may increase the toxicity of environmental toxicants through the elevation of CYP2E1-mediated metabolic activation. SHT fermentation using Lactobacillus fermentum or Lactobacillus gasseri resulted in attenuation of the SHT-induced CYP1A2 inhibition, but not CYP2E1 induction, suggesting that changes in the chemical composition of SHT through fermentation can affect the inhibition of CYP1A2 activity.

The mechanism underlying the killing activity of Lactobacillus strains against bacterial pathogens appears to be multifactorial. Here, we investigate the respective contributions of hydrogen peroxide and lactic acid in killing bacterial pathogens associated with the human vagina, urinary tract or intestine by two hydrogen peroxide-producing strains. In co-culture, the human intestinal strain Lactobacillus johnsonii NCC933 and human vaginal strain Lactobacillus gasseri KS120.1 strains killed enteric Salmonella enterica serovar Typhimurium SL1344, vaginal Gardnerella vaginalis DSM 4944 and urinary tract Escherichia coli CFT073 pathogens. The cell-free culture supernatants (CFCSs) produced the same reduction in SL1344, DSM 4944 and CFT073 viability, whereas isolated bacteria had no effect. The killing activity of CFCSs was heat-stable. In the presence of Dulbecco's modified Eagle's minimum essential medium inhibiting the lactic acid-dependent killing activity, CFCSs were less effective at killing of the pathogens. Catalase-treated CFCSs displayed a strong decreased activity. Tested alone, hydrogen peroxide triggered a concentration-dependent killing activity against all three pathogens. Lactic acid alone developed a killing activity only at concentrations higher than that present in CFCSs. In the presence of lactic acid at a concentration present in Lactobacillus CFCSs, hydrogen peroxide displayed enhanced killing activity. Collectively, these results demonstrate that for hydrogen peroxide-producing Lactobacillus strains, the main metabolites of Lactobacillus, lactic acid and hydrogen peroxide, act co-operatively to kill enteric, vaginosis-associated and uropathogenic pathogens.

Lactobacillus amylovorus DCE 471 produces amylovorin L, a bacteriocin with an antibacterial activity against some strains of the Lactobacillus lineage. Based on the sequence of one active peptide, a gene encoding active amylovorin L was cloned and sequenced. Genome walking allowed us to sequence a larger fragment of 7577 bp of genomic DNA, with 12 predicted ORFs. The previously characterized amylovorin L peptide-encoding gene is preceded by another gene encoding a small polypeptide with a typical bacteriocin-processing double-glycine site, suggesting that amylovorin L is a two-component class IIb bacteriocin (amylovorin Lalpha/beta). Lalpha and Lbeta show the highest similarity to gassericin T from Lactobacillus gasseri SBT2055 and BlpN from Streptococcus pneumoniae R6, respectively, and to LafA and LafX, which form the lactacin F bacteriocin of Lactobacillus johnsonii NCC 533. As for other lactic acid bacteria bacteriocins, amylovorin L showed no activity against the Gram-negative opportunistic pathogen Pseudomonas aeruginosa on its own, but showed synergistic inhibitory activity when used in combination with the peptide antibiotic colistin, and, remarkably, with the P. aeruginosa soluble bacteriocins, pyocins S1 and S2.

Consumption of fermented milk (FM) containing a probiotic, Lactobacillus gasseri SBT2055 (LG2055), previously showed a reduction in abdominal adiposity in a randomised controlled trial (RCT) using FM with 10(8) colony-forming units (cfu) of LG2055/g. However, whether the effectiveness is observed at lower concentrations, the recommended minimum or intermediate levels of probiotics (10(6) or 10(7) cfu/g, respectively), remains to be examined. A multi-centre, double-blind, parallel-group RCT was conducted using 210 healthy Japanese adults with large visceral fat areas (80·2 - 187·8 cm(2)). They were balanced for their baseline characteristics and randomly assigned to three groups receiving FM containing 10(7), 10(6) or 0 (control) cfu LG2055/g of FM, and were asked to consume 200 g FM/d for 12 weeks. Abdominal visceral fat areas, which were determined by computed tomography, at week 12, changed from baseline by an average of -8·5 % (95 % CI -11·9, -5·1; P< 0·01) in the 10(7) dose group, and by -8·2 % (95 % CI -10·8, -5·7; P< 0·01) in the 10(6) dose group. Other measures including BMI, waist and hip circumferences, and body fat mass were also significantly decreased from baseline at week 12 in both groups; interestingly, the cessation of taking FM for 4 weeks attenuated these effects. In the control group, none of these parameters significantly decreased from baseline. These findings demonstrate that consumption of LG2055 at doses as low as the order of 10(8) cfu/d exhibited a significant lowering effect on abdominal adiposity, and suggest that constant consumption might be needed to maintain the effect.

BACKGROUND: Lactobacillus gasseri BNR17 is a type of probiotic strain isolated from human breast milk. A study was reported regarding the fact that BNR17 was an inhibitor of obesity and diabetic activities in the human body through previous animal experiments. This study was furthered to investigate the effect of BNR17, a probiotic strain isolated from human breast milk, on obese and overweight adults. METHODS: Sixty-two obese volunteers aged 19 to 60 with body mass index ≥ 23 kg/m(2) and fasting blood sugar ≥ 100 mg/dL participated in a placebo controlled, randomized, and double-blind trial. For 12 weeks, 57 participants were given either placebo or BNR17 and were tested by measuring body fat, body weight, various biochemical parameters, vital signs, and computed tomography at the start of the study and at weeks 4, 8, and 12. The subjects assumed usual daily activities without having to make behavioral or dietary modifications during the course of the study. RESULTS: At the 12th week, a slight reduction in body weight was noted in the BNR17 group, but there were no significant weight changes between groups. Decrease of waist and hip circumferences in the BNR17 group was more pronounced than those in the placebo group. The two groups had no special or severe adverse reactions. CONCLUSION: Despite there being no change in behavior or diet, administration of only the supplement of BNR17 reduced weight and waist and hip circumference. However, there were no significant differences between the two groups. These findings warrant a subsequent longer-term prospective clinical investigation with a large population.

BACKGROUND: Vascular cognitive impairment (VCI) exhibits particularly high prevalence in East Asian populations. However, its pathogenesis remains elusive due to its multifactorial and complex nature. Emerging evidence highlights the microbiota-gut-brain axis as a novel and promising paradigm for elucidating VCI mechanisms and developing therapeutic interventions. This systematic review aims to synthesize recent advances in this field, offering critical perspectives to guide future research on VCI through the lens of gut-brain interactions. Notably, given Traditional Chinese Medicine's (TCM) holistic and multi-target therapeutic advantages, we incorporate TCM studies to complement conventional approaches. METHODS: We systematically searched PubMed, EMBASE, Web of Science, Cochrane Library, China National Knowledge Infrastructure (CNKI), Chinese Science and Technology Periodical Database (VIP), and Wanfang database for relevant studies from their inception to March 31, 2025, and conducted a comprehensive review. RESULTS: A total of 22 relevant studies were included in the final review. Current research primarily focused on analyzing the altered gut microbiota in VCI patients, with findings indicating significant changes in both the structure and abundance of gut microbiota. Enterobacteriaceae exhibited potential as a diagnostic biomarker for post-stroke cognitive impairment (PSCI) (AUC=0.629), while distinct microbial signatures involving Bifidobacterium, Lactobacillus gasseri, and Anaerostipes hadrus may effectively differentiated PSCI patients from stroke survivors without cognitive deficits (AUC values of 0.785, 0.792, and 0.750, respectively). Furthermore, multiple interventional studies from both basic and clinical research systematically explored the microbiota-gut-brain axis as a promising therapeutic target for VCI. They evaluated the efficacy of diverse approaches-such as fecal microbiota transplantation, aerobic exercise, pharmacological interventions, and acupuncture-on key outcome including gut microbiota composition, cognitive function, hippocampal integrity, and inflammatory markers. Basic experimental studies revealed that Prevotella histicola, Clo

Objective: With a global incidence of more than 10%, preterm birth (PTB) remains a significant concern. The vaginal microbiome strongly influences the well-being of the female reproductive tract. This study examines the correlation between changes in Lactobacillus vaginal microbiota and the PTB risk. Materials and Methods: A thorough search of PubMed, Web of Science, Cochrane Library, and EMBASE was conducted to locate studies that examined the association between changes in Lactobacillus vaginal microbiota and the risk of PTB from January 1, 2010, to January 30, 2023. The risk of PTB was determined by calculating odds ratios (ORs) with 95% confidence intervals (CIs). Results: In our analysis, there were 11 studies with 1577 pregnant women. The findings revealed a significant negative correlation between higher Lactobacillus abundance and the PTB risk (OR = 0.49, 95% CI: 0.29-0.84, p = 0.009 < 0.05). Similarly, the four individual dominant species, Lactobacillus crispatus (OR = 0.3, 95% CI: 0.14-0.67, p = 0.003 < 0.05), Lactobacillus gasseri (OR = 0.34, 95% CI: 0.17-0.69, p = 0.003 < 0.05), Lactobacillus iners (OR = 0.68, 95% CI: 0.49-0.93, p = 0.016 < 0.05), and Lactobacillus jensenii (OR = 0.43, 95% CI: 0.21-0.89, p = 0.024 < 0.05), were also negatively associated with the PTB risk. The risk of Lactobacillus for PTB was significant in both America (OR = 0.67; 95% CI: 0.50-0.92) and Asia (OR = 0.20; 95% CI: 0.09-0.47), whereas no significant risk was found in Europe (OR = 0.49; 95% CI: 0.11-2.15). Conclusions: Our study demonstrated that the abundance of Lactobacillus and the four dominant individual species (L. crispatus, L. jensenii, L. iners, and L. gasseri) were significantly and negatively associated with the PTB risk.

Gut microbiota is important for maintaining body weight. Modulation of gut microbiota by probiotics may result in weight loss and thus help in obesity treatment. The aim of this systematic review was to evaluate the effects of Lactobacillus on weight loss and/or fat mass in overweight adults. A search was performed on the Medline (PubMed) and Scopus electronic databases using the search terms: 'probiotics', 'Lactobacillus, 'obesity', 'body weight changes', 'weight loss', 'overweight', 'abdominal obesity', 'body composition', 'body weight', 'body fat' and 'fat mass'. In the total were found 1567 articles, but only 14 were included in this systematic review. Of these nine showed decreased body weight and/or body fat, three did not find effect and two showed weight gain. Results suggest that the beneficial effects are strain dependent. It can highlight that Lactobacillus plantarum and Lactobacillus rhamnosus when combined with a hypocaloric diet, L. plantarum with Lactobacillus curvatus, Lactobacillus gasseri, Lactobacillus amylovorus, Lactobacillus acidophilus and Lactobacillus casei with phenolic compounds, and multiple species of Lactobacillus.

Lactic acid bacteria-derived exopolysaccharides (EPS) have shown considerable potential in alleviating intestinal inflammation. However, the therapeutic efficacy of Lactobacillus gasseri EPS against ulcerative colitis (UC) remains largely unexplored. This work identified a novel EPS isolated from L. gasseri LGZ1029, a strain derived from infant feces. Structural analysis revealed that the highly purified fraction LP2⁎ (53.7 kDa) is a heteropolysaccharide possessing an alternating →6)-α-Glcp-(1 → 2)-α-Manp-(1 → backbone. This structure is substituted at the C2 position of glucopyranosyl residues and mainly comprises mannose, glucose, and galactose in a molar ratio of 74.52:22.46:3.03. In vivo evaluations in a colitis model induced by dextran sulfate sodium (DSS) demonstrated that the partially purified EPS fraction LP2 exerted mucosal protective and anti-inflammatory effects comparable to those of the live probiotic strain. Specifically, LP2 attenuated disease activity index (DAI) scores and body weight loss, alleviated colonic damage, and suppressed inflammation by downregulating MPO, TNF-α, and NF-κB p65, while upregulating IL-10. Furthermore, LP2 modulated gut microbiota composition and restored host metabolic homeostasis, particularly by regulating tryptophan, lipid, sulfate, and organic acid metabolism. These findings provide structural and mechanistic insights into the potential application of L. gasseri EPS as a bioactive dietary ingredient or therapeutic candidate for UC management.

The role of probiotics in weight management remains controversial. In this study, we found that Lactobacillus gasseri LG-G12 exhibits gut colonization capacity and metabolic regulation potential in vitro. In vivo, LG-G12 alleviated high-fat diet-induced weight gain and visceral fat accumulation in mice. Fecal targeted metabolomics identified bile acid metabolism as a key pathway. Furthermore, LG-G12 might exhibit bile salt hydrolase and hydroxysteroid dehydrogenase activities, contributing to a bile acid profile characterized by low cholic acid and high ursodeoxycholic acid levels. Additionally, LG-G12 increased the abundance of deoxycholic acid-producing Eubacterium spp., leading to elevated DCA levels. This distinct bile acid profile activated FXR and TGR5, reducing lipid accumulation and adipocyte differentiation in the liver and epididymal adipose tissue, and promoting thermogenesis in brown adipose tissue. Collectively, these findings demonstrate that LG-G12 ameliorates high-fat diet-induced obesity via the gut microbiota-bile acid axis, positioning LG-G12 as a promising candidate for weight management. © 2026 American Chemical Society.

Hyperuricemia (HUA) is widespread, and since conventional long-term treatments can be toxic, safer multi-target alternatives are required. Here, we tested a naturally derived synbiotic pairing of the uricolytic probiotic Lactobacillus gasseri SYP-B4432 with a polyphenol-rich Rumex hanus by. extract in a mouse model of hyperuricemia. In just five weeks of daily treatment, the combination reduced serum uric acid by 57.86%, suppressed serum xanthine oxidase activity by 14.31%, and restored the Bacteroidetes/Firmicutes ratio while lowering pro-inflammatory cytokines and attenuating renal histopathology. Importantly, no hepatic/renal impairment or body weight abnormalities were detected, confirming the safety of this intervention. Collectively, the probiotic-herbal duo alleviates HUA through the synergy of three modes of action: curtailing uric acid synthesis (via XOD inhibition), reshaping gut microbiota (to enhance UA excretion), and resolving renal inflammation (via cytokine modulation). This natural, safe, and multi-target synbiotic provides a clinically translatable strategy that may address the side effect limitations of conventional hyperuricemia drugs. ©2026 BMFH Press.

BACKGROUND: Halitosis is driven by volatile sulfur compounds (VSCs) produced by anaerobic oral bacteria and commonly worsens with periodontitis. We investigated whether the probiotic complex Complex OK suppresses VSC pathways, modulates oral dysbiosis, and reduces inflammation. MATERIALS AND METHODS: Complex OK was evaluated in vitro for downregulating the VSC-related mgl gene and antagonism against malodor pathogens using a 1:1 co-culture of Lactobacillus gasseri HHuMIN D and Lacticaseibacillus paracasei OK. In vivo, ligature-induced periodontitis was created in 45 male Sprague-Dawley rats assigned to healthy control, periodontitis control, or low-, medium-, and high-dose groups (0.2, 2, and 20 mg/head/day, corresponding to approximately 10^7, 10^8, and 10^9 CFU/head/day, respectively) treated for 5 weeks. Endpoints included body weight, saliva secretion, tongue coating index (TCI), alveolar bone loss, systemic IL-1β, and oral microbial composition. RESULTS: Complex OK reduced mgl expression and inhibited Streptococcus mutans (98.2%), Fusobacterium nucleatum (91.2%), Porphyromonas gingivalis (99.1%), and Prevotella intermedia (96.6%). High-dose supplementation increased body weight (329.02 ± 14.59 g) and saliva secretion (4.03 ± 2.06 mg), lowered TCI (6.40 ± 2.60), decreased Fusobacterium abundance, reduced IL-1β, and showed a non-significant trend toward reduced alveolar bone loss compared with periodontitis controls. CONCLUSIONS: Complex OK may represent a noninvasive probiotic strategy for modulating halitosis-associated molecular pathways, supporting oral microbiome balance, and reducing periodontal inflammation, with potential as an adjunctive therapy for periodontal care pending further clinical validation. Plain Language Summary: Complex OK suppresses mgl genes, reducing sulfur compound levels linked to halitosis.Probiotics block oral pathogens' growth and stop them from binding to epithelial cells.Tongue coating index declined, indicating less biofilm and better oral cleanliness.Probiotics modulates microbiota, reducing harmful taxa such as Fusobacterium, Veillonella.Probiotics lowered IL-1β, showing systemic anti-inflammatory effects on the body. © 2

BACKGROUND/OBJECTIVES: Atopic dermatitis (AD) is a chronic inflammatory skin disease involving barrier dysfunction, pruritus, and immune dysregulation, and microbial-based interventions are being explored as supportive approaches. This study first conducted an exploratory pilot model-development experiment to characterize DNCB-induced dermatitis-like inflammation and subsequently compared oral live Lactobacillus, heat-killed Lactobacillus (paraprobiotics), and a combined live/heat-killed formulation after disease induction. METHODS: Male BALB/c mice received repeated topical DNCB exposure followed by 21 days of oral intervention. Outcomes included gross lesion scores, cumulative scratching time, ear and spleen indices, histopathology, qualitative mast-cell staining in the therapeutic experiment, and serum IgE, IL-4, and IFN-γ. Longitudinal gross scores were reanalyzed using generalized estimating equations with group, time, and group-by-time interaction. RESULTS: After Holm correction, the mixed formulation showed a lower left-ear erythema score than placebo at Week 2, whereas no other intervention-versus-placebo gross-score comparison remained significant. Paraprobiotic and mixed formulations reduced spleen weight, but histopathological and serum biomarker responses were variable. CONCLUSIONS: These findings indicate partial, endpoint-dependent effects of live and heat-killed Lactobacillus formulations in DNCB-induced dermatitis-like inflammation.

Liraglutide, a GLP-1 receptor agonist, is used to induce weight loss. However, limited information exists on liraglutide's effects on the gut bacterial community and their restoration after washout. We investigated liraglutide's effect on the gut bacterial community in diet-induced obese (DIO) mice and whether these changes persist after washout. Twenty-four male C57BL/6J mice on high-fat (HFC) or low-fat (LFC) diets were monitored for 21 days. A subgroup of high-fat mice received daily liraglutide for 14 days (HFL), followed by a 7-day washout. Liraglutide induced significant weight loss by Day 4, which persisted during treatment and partially reversed post-treatment. For bacterial community analysis, 7.1 million 16S rRNA gene sequences were retrieved using Illumina paired-end sequencing. We observed distinct shifts in the gut bacterial community structure during liraglutide treatment, which mostly returned to baseline after the 7-day washout. Using Similarity Percentages analysis, 21 amplicon sequence variants (ASVs) were identified as major contributors. Nine ASVs, related to Lactobacillus gasseri, L. paragasseri, L. johnsonii, and Leptogranulimonas caecicola, significantly increased during treatment and declined post-washout. The remaining 12 ASVs, associated with protein- and carbohydrate-fermenting bacteria (Romboutsia, Faecalicatena, and Oscillibacter), decreased during treatment. Comparison across all groups identified 29 ASVs, clustering into seven phylogenetic groups, highlighting liraglutide's enrichment of bile acid- and mucin-associated taxa and suppression of carbohydrate-fermentative genera. These findings demonstrate that liraglutide induces rapid, diet-dependent, yet reversible shifts in the gut microbiome, favoring lactic acid-producing bacteria while reducing fermentative taxa. Such microbial changes may contribute to liraglutide's metabolic effects and provide insight into host-microbiome interactions in obesity treatment.IMPORTANCEObesity and overweight states are intricately linked to the gut bacterial community; however, the effects of common obesity treatments such as GLP-1 receptor agonists on gut bacteria remain unclear. Here, we show t

Grapevine branch and leaf silage (GBLS), a polyphenol-rich unconventional forage, exhibits antimicrobial and antioxidant properties that can benefit animal health and productivity. A total of 60 healthy six-month-old Kazakh rams (43.29 ± 4.55 kg, p > 0.05 for initial body weight among groups) were randomly assigned to three dietary groups, each consisting of four replicates with five rams per replicate. The control group (CK) was fed a basal diet based on whole-plant corn silage, whereas the experimental groups received diets in which 50% (GBLS50%) or 100% (GBLS100%) of the corn silage was replaced with GBLS. A 10-day adaptation period preceded the 90-day formal feeding trial. Results showed a significant quadratic response for average daily gain (ADG) and average daily feed intake (ADFI) across GBLS substitution rates (p < 0.05), with the 50% level yielding the highest values. Specifically, ADFI at the 50% replacement level was significantly higher than that of the control (p < 0.05), confirming an inverted U-shaped response with 50% as the optimal substitution rate. However, in-depth analysis of serum biochemical parameters revealed that GBLS supplementation significantly reduced serum concentrations of total cholesterol, triglycerides, urea nitrogen, interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), and malondialdehyde (MDA), while significantly increasing levels of immunoglobulins (IgA, IgM, IgG), superoxide dismutase (SOD), and catalase (CAT) (p < 0.05). Rumen fermentation analysis showed that the GBLS50% group had significantly lower concentrations of acetate, butyrate, and total volatile fatty acids (VFA) (p < 0.05). In the rumen microbiota study, no significant differences were observed in alpha or beta diversity or at the phylum level between groups (p > 0.05); however, the abundance of Lactobacillus gasseri was significantly reduced in the GBLS50% group (p < 0.05). Metabolomic profiling identified 43 significantly altered metabolites-27 upregulated (e.g., PE (18:1(9Z)/0:0) and 12,14-pentacosadiynoic acid) and 16 downregulated (e.g., deoxyadenosine). Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis highlighted purine met

This study evaluated the anti-acne potential of extracellular proteins derived from Lactobacillus gasseri (LG-EPs) by integrating physicochemical characterization, antibacterial assessment, cellular assays, and an in vivo sebaceous gland model. LG-EPs were obtained by ammonium sulfate precipitation and characterized using gel permeation chromatography/light scattering (GPC/LS) and liquid chromatography-tandem mass spectrometry (LC-MS/MS). The molecular weight of LG-EPs was mainly distributed between 1.0 × 10⁴ and 2.0 × 10⁴ g/mol, and peptide analysis identified four peptides with antimicrobial potential and twelve peptides with antioxidant potential. LG-EPs exhibited direct antibacterial activity against acne-associated bacteria, with MIC and MBC values of 600 µg/mL against Cutibacterium acnes and MIC and MBC values of 700 µg/mL and 1 mg/mL, respectively, against Staphylococcus aureus. Growth-curve and biofilm adhesion assays further showed that LG-EPs inhibited bacterial proliferation and adhesion. In LPS-stimulated HaCaT cells, LG-EPs reduced the secretion of pro-inflammatory cytokines, including IL-6, IL-8, IL-1β, and TNF-α, while increasing the expression of barrier-related factors such as AQP3, FLG, and LOR. In a golden hamster model, topical LG-EP treatment decreased sebum production and downregulated the transcription of lipogenesis-related genes, including SREBP-1, FAS, and ACC1. These effects were associated with reduced transcript levels of PI3K, AKT, and mTOR, while the anti-sebum effect was accompanied by increased AMPK transcription. Overall, LG-EPs showed multi-target anti-acne potential through antibacterial, anti-inflammatory, barrier-protective, and sebum-suppressive effects. © 2026. The Author(s).

Polysaccharides derived from edible fungi can alleviate ulcerative colitis (UC) by enriching beneficial probiotics. However, the mechanisms underlying their interaction with probiotics remain unclear. Here, The current study investigated how Poria cocos polysaccharide (PCP) enriches L. gasseri and the effects of L. gasseri on dextran sulfate sodium (DSS)-induced UC. Genomic analyses predicted multiple polysaccharide utilization loci in L. gasseri, and growth kinetics together with gene expression assays confirmed that PCP promoted L. gasseri growth and upregulated glycoside hydrolases (GH1 and GH3). In UC induced mice, L. gasseri alleviated weight loss, colon shortening, and Disease activity index score, increased goblet cells, and decreased pro-inflammatory cytokines. In addition, targeted metabolomics revealed that L. gasseri intervention was associated with the restoration of indole-3-lactic acid (ILA) and indole-3-propionic acid (IPA) levels in the tryptophan-indole metabolic pathway. RT-qPCR, Western blot, and immunofluorescence analyses showed that L. gasseri intervention induced the upregulation of AHR expression and the downstream genes CYP1A1 and IL-22. Treatment with the AHR antagonist CH223191 further confirmed that the anti-inflammatory and barrier-protective effects were dependent on the AHR pathway. Notably, It was further verified through ABX depletion experiments that PCP exerts its indirect therapeutic effect via L. gasseri. Consequently, this study provided new insights into the interaction between PCP and probiotics the mechanism underlying the protective role of L. gasseri in the intestinal barrier, and proposes promising preliminary combination strategy for the treatment and prevention of UC.

The increasing prevalence of obesity worldwide has highlighted the need for adjunct strategies targeting metabolic dysfunction beyond simple weight reduction. This review aimed to evaluate the hypothesis that the anti-obesity effects of probiotics are mediated through modifications in fat distribution, metabolic inflammation, and appetite regulation rather than reductions in body weight or body mass index (BMI). A critical appraisal of recent randomized, double-blind, placebo-controlled human clinical trials was conducted, focusing on the effects of probiotic supplementation on adiposity, fat distribution, metabolic parameters, and eating behaviors. The evidence indicates that probiotic strains, particularly Lactobacillus gasseri and Bifidobacterium breve, are consistently associated with reductions in visceral fat, total body fat, waist circumference (WC), and body fat percentage, while effects on body weight and BMI remain modest. Strains of Lacticaseibacillus rhamnosus showed improvements in satiety. Probiotic supplementation with B. breve, B. pseudocatenulatum, L. plantarum Inducia were also linked to improvements in lipid metabolism, glucose homeostasis, inflammatory markers, and appetite regulation. Notably, several studies reported more pronounced effects in female participants. Overall, these findings suggest that probiotics exert anti-obesity effects primarily through metabolic and compositional changes rather than direct weight loss, supporting their role as a complementary strategy in obesity management. © The Author(s) 2026. Published by Oxford University Press on behalf of Applied Microbiology International. All rights reserved. For commercial re-use, please contact [email protected] for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site-for further information please contact [email protected].

Chronic, relapsing colonic inflammation defines ulcerative colitis (UC) and heightens long-term colorectal cancer risk. Probiotics, proven beneficial, have emerged as a promising adjunctive strategy for UC management. We conducted a two-tiered evaluation of the breast-milk-derived strain Lactobacillus gasseri FN136. In vitro, FN136 secreted anti-inflammatory amino acids and indole derivatives‌, displayed pronounced acid- and bile-salt tolerance, and exhibited significant antimicrobial activity. In vivo, daily oral administration of 1 × 10⁹ CFU FN136 markedly attenuated DSS-induced UC: serum L-arginine was restored, splenic regulatory T cells frequency increased by 42.09% (P < 0.05), and nitric oxide production was elevated, while disease activity index, body-weight loss, and colonic shortening were all significantly reduced (P < 0.05). Histopathology revealed intact crypt architecture and diminished inflammatory infiltration; systemic inflammation was suppressed as evidenced by decreased interleukin-6, myeloperoxidase, lipopolysaccharide, and FITC-dextran levels (P < 0.05). However, 16 S rRNA sequencing revealed no significant alterations in global microbial composition, indicating that FN136 exerts protection via a microbiota-independent postbiotic-host axis. Collectively, FN136 mitigates DSS-induced UC by restoring serum arginine and orchestrating immune-barrier homeostasis through a postbiotic pathway, offering a novel framework for precision UC intervention. © 2025. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Obesity-induced metabolic disorders, including insulin resistance and type 2 diabetes mellitus (T2DM), are significant global health issues exacerbated by high-fat diets (HFD). These conditions often lead to non-alcoholic fatty liver disease (NAFLD), characterised by hepatic lipid accumulation, inflammation, and oxidative stress, which further impair insulin signalling. Probiotics, particularly those in the Lactobacillus genus, have been shown to ameliorate metabolic disorders. This study evaluated the antidiabetic and hepatoprotective effects of Lactobacillus paragasseri SBT2055 (LG2055), a sister taxon of L. gasseri, in HFD-induced obese mice. Mice supplemented with LG2055 (1 × 108 or 1 × 1010 CFU/mouse/day) exhibited significant reductions in body weight, fasting blood glucose, and homeostatic model assessment for insulin resistance (HOMA-IR) values, alongside improved glucose tolerance and hepatic glycogen storage. LG2055 supplementation modulated the expression of genes involved in hepatic gluconeogenesis and intestinal glucose uptake, effectively suppressing insulin resistance. Hepatic lipid accumulation and liver weight were significantly reduced, accompanied by downregulation of lipogenic genes and proteins, while antioxidant enzyme activities {superoxide dismutase (SOD), catalase, glutathione peroxidase (GSH-Px), and glutathione reductase (GR)} were enhanced, reducing oxidative stress markers. LG2055 also alleviated liver inflammation by decreasing plasma lipopolysaccharide (LPS) levels and suppressing Toll-like receptor signalling, as well as reducing the expression of pro-inflammatory cytokines and fibrosis-related markers. These findings suggest that LG2055 mitigates HFD-induced metabolic disturbances by improving insulin sensitivity, reducing hepatic lipid synthesis, enhancing antioxidant defences, and attenuating inflammation. LG2055 demonstrates potential as a therapeutic probiotic for the prevention and treatment of T2DM and associated metabolic disorders.

Lactobacillus spp. and other beneficial bacteria are predominant in the vaginal microbiota and represent an opportunity to correct dysbiosis if administered intravaginally. Since no commercial formulations are available, developing magistral formulations is an option, provided that they ensure viability and therapeutic efficacy. To evaluate their stability and culturability, four magistral formulations containing 109 microorganisms were tested: vaginal capsules, vaginal ointment, gelatinous ovules, and waxy ovules. Certified strains of L. crispatus, L. johnsonii, L. gasseri, Limosilactobacillus reuteri, and Lacticaseibacillus rhamnosus, as well as a combination of the five, were used. The formulations were tested for pharmaco-technical stability using average weight and disintegration tests, as well as evaluation organoleptic. In addition, microbial recovery was evaluated by counting Colony-Forming Units (CFUs). All forms, except the gelatinous ovules, allowed microbial recovery at concentrations from 107 to 109 CFUs, ensuring stability for 60 days. The recovery varied depending on the strains and dosage forms employed, with the most favorable outcomes for vaginal capsules. This highlights the need for standardized strains and excipients in magistral formulations. Further studies are needed to evaluate the viability of other strains of different excipients, vehicles, or different storage; however, capsules have demonstrated efficacy and are an excellent candidate for vaginal use formulations of Lactobacillus spp.

Lactobacillus species show strong potential in fighting obesity-related inflammation and metabolic issues. Obesity causes inflammation in adipose tissue, which harms insulin sensitivity and leads to fat buildup. Lactobacillus strains like Lactobacillus gasseri, Lactobacillus reuteri, and Lactobacillus plantarum help regulate lipid metabolism by boosting key genes, preventing fat cell formation, and encouraging fat breakdown. They also produce short-chain fatty acids (SCFAs) that improve gut health, activate metabolic pathways, and reduce inflammation. Studies in animals have shown that Lactobacillus can reduce body weight, fat, and inflammation, with Lactobacillus plantarum being especially effective in improving gut microbiota and liver function. When combined with other probiotics or prebiotics, these strains work even better, enhancing lipid metabolism and reducing inflammation. These results suggest that Lactobacillus could be an effective way to manage obesity and related health problems by influencing metabolism, gut health, and inflammation. However, more research, particularly human clinical trials, is needed to confirm its potential as a dietary treatment for obesity. © The Author(s) 2025. Published by Oxford University Press on behalf of Applied Microbiology International.

Obesity and metabolic dysfunction-associated fatty liver disease (MAFLD) are prevalent metabolic disorders with substantial global health implications that are often inadequately addressed by current treatments and may have side effects. Probiotics have emerged as promising therapeutic agents owing to their beneficial effects on gut health and metabolism. This study investigated the synergistic effects of a probiotic combination of BNR17 and ABF21069 on obesity and MAFLD in C57BL/6 mice fed a high-sucrose diet. The probiotic combination significantly reduced body weight and fat accumulation compared with the high-sucrose diet. It also alleviated elevated serum leptin levels induced by a high-sucrose diet. Histological analysis revealed a significant reduction in white adipose tissue and fatty liver in the mice treated with the probiotic combination. Furthermore, increased expression of genes related to β-oxidation, thermogenesis, and lipolysis suggested enhanced metabolic activity. The probiotic groups, particularly the BNR17 group, showed an increase in fecal exopolysaccharides, along with a tendency toward a lower expression of intestinal sugar transport genes, indicating reduced sugar absorption. Additionally, inflammatory markers in the liver tissue exhibited lower expression in the ABF21069 group than in the HSD group. Despite each strain in the combination group having distinct characteristics and functions, their combined effect demonstrated synergy in mitigating obesity and MAFLD, likely through the modulation of fecal exopolysaccharides content and improvement in lipid metabolism. These findings underscore the potential of probiotic supplementation as a promising assistant therapy for managing obesity and MAFLD and provide valuable insights into its therapeutic mechanisms in metabolic disorders. © 2024. The Author(s), under exclusive licence to Microbiological Society of Korea.

Wild rice (WLD) attenuated hyperglycemia, hyperlipidemia and chronic inflammation in mice receiving a high-fat diet (HFD) versus white rice (WHR), but the underlying mechanism is not well understood. We examined the influence of HFD + WLD on gut microbiota, short chain fatty acids (SCFAs) and the correlation with metabolic or inflammatory markers in mice versus HFD + WHR. C57BL/6J mice received HFD + 26 g weight (wt) % WHR or WLD or 13 g wt% WHR + 13 g wt% WLD (WTWD) for 12 weeks. Plasma levels of glucose, cholesterol and triglycerides, insulin resistance and inflammatory markers after overnight fasting were lower, and the abundances of fecal Lactobacillus gasseri and propionic acid were higher in HFD + WLD-fed mice than in HFD + WHR-fed mice. The anti-inflammatory effects of HFD + WTWD were weaker than HFD + WLD but were greater than those in HFD + WHR-fed mice. Abundances of fecal Lactobacillus gasseri and propionic acid in mice receiving HFD + WLD were higher than those in mice fed with HFD + WHR. The abundances of fecal L. gasseri and propionic acid negatively correlated with metabolic and inflammatory markers. The findings of the present study suggest that WLD attenuated metabolic and inflammatory disorders in mice on HFD. Interactions between WLD components and gut microbiota may upregulate fecal SCFAs, and the latter may be attributed to the benefits of WLD on metabolism and inflammation in mice on HFD.

Oral administration of probiotics has been proposed as a promising biotherapy to prevent and treat different diseases related to gastrointestinal disorders, such as irritable bowel syndrome (IBS). Due to the increasing research area on the characterisation of new probiotic bacterial strains, it is necessary to perform suitable in vitro experiments, using pertinent cellular models, in order to establish appropriate readout profiles based on IBS symptoms and subtypes. In this work, a collection of 30 candidate strains, belonging mainly to the Lactobacillus and Bifidobacterium genera, were screened using three different sets of in vitro experiments with different readouts to identify promising probiotic strains with: (1) the ability to inhibit the synthesis of IL-8 production by TNF-α stimulated HT-29 cells, (2) immunomodulatory properties quantified as increased IL-10 levels in peripheral blood mononuclear cell (PBMCs), and (3) the ability to maintain epithelial barrier integrity by increasing the trans-epithelial/endothelial electrical resistance (TEER) values in Caco-2 cells. Based on these criteria, three strains were selected: Lactobacillus gass

Fucoidan from Laminaria japonica became sterilized with an autoclave and ultraviolet (UV) radiation. Potential prebiotic and antibacterial activities of sterilized fucoidans (SF) were the subject of investigation. Molecular weight, monosaccharide composition, FTIR, and NMR spectra of SF underwent evaluations to elucidate the relationship between the structure and activities of SF. The growth of Lactobacillus rhamnosus GG and L. acidophilus with autoclave sterilized fucoidan (ASF) and the growth of L. plantarum, L. gasseri, L. paracasei, and L. reuteri with UV sterilized fucoidan (USF) increased significantly. Also, fucoidan was vastly more effective than fructooligosaccharides in improving the growth of L. gasseri, L. reuteri, and L. paracasei. The growth of Escherichia coli and Bacillus cereus decreased at each SF concentration. ASF was more effective against E. coli, B. cereus, and Staphylococcus aureus than the USF efficiency. However, USF exhibited more inhibitory effects on the growth of Enterobacteriaceae compared to the ASF efficiency. When comparing the ASF and USF, autoclave caused a considerable decrease in molecular weight and uronic acid content, increased fucose and galactose, and made no significant changes in NMR spectra. Fucoidan effectively promoted probiotic bacterial growth and reduced pathogenic outbreaks in t

Human milk contains a variety of microorganisms that exert benefit for human health. In the current study, we isolated a novel Lactobacillus gasseri strain named Lactobacillus gasseri (L. gasseri) SHMB 0001 from human milk and aimed to evaluate the probiotic characteristics and protective effects on murine colitis of the strain. The results showed that L. gasseri SHMB 0001 possessed promising potential probiotic characteristics, including good tolerance against artificial gastric and intestinal fluids, adhesion to Caco-2 cells, susceptibility to antibiotic, no hemolytic activity, and without signs of toxicity or infection in mice. Administration of L. gasseri SHMB 0001 (1 × 108 CFU per gram of mouse weight per day) reduced weight loss, the disease activity index, and colon shortening in mice during murine colitis conditions. Histopathological analysis revealed that L. gasseri SHMB 0001 treatment attenuated epithelial damage and inflammatory infiltration in the colon. L. gasseri SHMB 0001 treatment increased the expression of colonic occludin and claudin-1 while decreasing the expression of pro-inflammatory cytokine genes. L. gasseri SHMB 0001 modified the composition and structure of the gut microbiota community and partially recovered the Clusters of Orthologous Groups (COG) and Kyoto Encyclopedia of Genes and Genomes (

INTRODUCTION: Gut microbiome changes are linked to obesity, but findings are based on stool data. In this article, we analyzed the duodenal microbiome and serum biomarkers in subjects with normal weight, overweight, and obesity. METHODS: Duodenal aspirates and serum samples were obtained from subjects undergoing standard-of-care esophagogastroduodenoscopy without colon preparation. Aspirate DNAs were analyzed by 16S rRNA and shotgun sequencing. Predicted microbial metabolic functions and serum levels of metabolic and inflammatory biomarkers were also assessed. RESULTS: Subjects with normal weight (N = 105), overweight (N = 67), and obesity (N = 42) were identified. Overweight-specific duodenal microbial features include lower relative abundance (RA) of Bifidobacterium species and Escherichia coli strain K-12 and higher Lactobacillus intestinalis , L. johnsonii , and Prevotella loescheii RA. Obesity-specific features include higher Lactobacillus gasseri RA and lower L. reuteri (subspecies rodentium ), Alloprevotella rava , and Leptotrichia spp RA. Escalation features (progressive changes from normal weight through obesity) include decreasing Bacteroides pyogenes , Staphylococcus hominis , and unknown Faecalibacterium species RA, increasing RA of unknown Lactobacillus and Mycobacterium species, and decreasing microbial potential for biogenic amines metabolism. De-escalation features (dir

Introduction. Cervicovaginal diversity has been reported as a predictive biomarker for cervical cancer risk. We recently reported the bio-therapeutic potential of vaginal probiotics from healthy Indian women against vaginal pathogens, isolated from the invasive cervical cancer (ICC) patients.Gap Statement. The cervicovaginal microflora from cervical cancer patients has not yet been reported from Indian population.Aim. The present study aimed at comparing the cervicovaginal microbiome between healthy controls (HC) and ICC patients from the Indian population.Methodology. In total, 30 vaginal swabs (15 from HC and 15 from ICC) were subjected to 16S rRNA gene sequencing. Alpha diversity was evaluated by Shannon and Chao1 index; and beta diversity by principle coordinate analysis (PCoA) of weighted and unweighted UniFrac distances. The relative abundance of th

The aim of this study was to evaluate the cholesterol lowering ability of Lactic Acid Bacteria (LAB) isolated from human breast milk under in vitro and in vivo conditions. Six LAB isolates namely Lacticaseibacillus casei 1A, Lactobacillus gasseri 5A, Enterococcus faecium 2C, Limosilactobacillus fermentum 3D, Pediococcus acidilactici 1C, and Lactiplantibacillus plantarum 7A, were examined for their bile resistance, bile salt hydrolase activity, cholesterol assimilation and viability in cholesterol rich; DeMan Rogosa and Sharpe broth, simulated gastric, small and upper intestinal conditions. During in vivo experiments, two putative LAB isolates were orally gavage to BALB/c mice, fed with normal basal and cholesterol rich (HCD) diets, daily for a period of 4 weeks. Blood serum analysis including total serum cholesterol, triglycerides, high-density and low-density lipoprotein (LDL) cholesterol levels and total fecal LAB counts of the animals were determined. The isolates in study showed bile resistance and bile salt hydrolysis activity, while significant differences (P < 0.05) were seen in their cholesterol assimilation ability. L. gasseri 5A (195.67%) and L. plantarum 7A (193.78%) displayed highest cholesterol removal percentages, respectively. Animals in HCD, fed with L. gasseri 5A and L. plantarum 7A showed decreased levels of total cholesterol and LDL, compared to the control groups. In HCD group liver weight was increased, while fecal LAB counts were decreased. No changes were observed in behavior or body weight in all experimental groups. In conclusion, L. gasseri 5A and L. plantarum 7

INTRODUCTION: Despite the benefits associated with weight reduction, the anatomical and functional changes of bariatric surgery may favor the development of undesirable side effects such as the appearance of gastrointestinal symptoms (GIS). The aim of this study was to evaluate the effects of using probiotics in individuals with GIS 1 year after being submitted to Roux-en-Y Gastric Bypass (RYGB). MATERIALS AND METHODS: This is an experimental, prospective, randomized, cross-over, triple-blind, placebo-controlled study, carried out with patients 1 year after being submitted to RYGB and who reported at least one moderate GIS. Subjects were randomized into two groups and completed the two research periods: in one they received placebo capsules, in the other 50 billion CFU of probiotics (Lactobacillus acidophilus, Bifidobacterium lactis, Lactobacillus rhamnosus, Bifidobacterium longum, Lactobacillus plantarum, Bifidobacterium bifidum and Lactobacillus gasseri), both for 8 weeks, with 8 weeks of wash-out period in b

In the current study the effects of metformin and cyanidin on the immune system and intestinal flora in rats with type-2 diabetes was investigated. The findings showed that metformin or cyanidin treatment considerably reduced the rise in body weight and glucose levels induced by type-2 diabetes. The type-2 diabetic rats' glucose tolerance was significantly increased by cyanidin administration comparable to that of metformin. Cyanidin administration resulted in a significant reduction in serum cholesterol and low-density lipoprotein (LDL) levels in rats with type-2 diabetes. Treatment with cyanidin significantly increased the ratio of high-density lipoprotein to low-density lipoprotein in type-2 diabetes rats. Cyanidin administration significantly raised the ratio of Firmicutes to Bacteroidetes in the fecal samples of type-2 diabetic rats compared to the model group. In comparison to the model group, it also significantly raised the levels of Lactobacillus intestinalis, Lactobacillus gasseri, and Lactobacillus reuteri in the type-2 diabetes rats. In type-2 diabetes rat fecal samples, the abundance of Christensenellaceae significantly increased while Enterobacteriaceae and Proteobacteria were found to decrease upon cyanidin administration. Furthermore, cyanidin administration to the rats with type-2 diabetes significantly improved the glucose homeostasis. In conclusion, the study demonstrates that cyanidin enhances glucose homeostasis in rats with type-2 diabetes, potentially through controlling intestinal flora. Thus, cyanidin may be looked into more as a possible therapeutic agent for type 2 diabetes. © 2023. Pleiades Publishing, Ltd.

Dysbiotic vaginal microbiota (DVM) disturb the vaginal environment, including pH, metabolite, protein, and cytokine profiles. This study investigated the impact of DVM on the vaginal environment in 40 Korean pregnant women and identified predictable biomarkers of birth outcomes. Cervicovaginal fluid (CVF) samples were collected in the third trimester using vaginal swabs, examined for pH, and stored at -80 °C for further analysis. The samples were grouped as full-term (FTB, n = 20) and preterm (PTB, n = 20) births. The microbiota was profiled in the V1-V9 regions. The levels of targeted metabolites, TLR-4, and cytokines were determined. The pH of CVF from PTB (>4.5) was significantly higher than that of the CVF from FTB (>3.5) (p < 0.05). Neonatal gestational age at delivery, birth weight, and Apgar score differed significantly between groups. The relative abundances of beneficial Lactobacillus spp., such as Lactobacillus gasseri, Lactobacillus jensenii, and Bifidobacterium, were higher in FTB, whereas those of pathogenic Enterococcus faecalis, Staphylococcus, Prevotella, Ureaplasma parvum, and Corynebacterium spp. were higher in PTB. Acetate, methanol, TLR-4, and TNF-α levels were negatively correlated with gestational age at delivery and birth weight. Moreover, ethanol, methanol, TLR-4, IL-6, IL-1β, and TNF-α levels were positively correlated with succinate, acetate, acetoacetate, formate, and ammonia. Overall, DVM induces preterm birth via pathogenic molecules in the vagina.