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Limosilactobacillus reuteri normalizes gut microbiota dysfunction and social deficits of rat offspring associated with prenatal exposure to stress.

Mentions Oxytocin

Discovery of a novel and potent KRAS(G12V)-targeting peptide with antiproliferative activity against colorectal cancer cells.

1. J Enzyme Inhib Med Chem. 2026 Dec;41(1):2684700. doi: 10.1080/14756366.2026.2684700. Epub 2026 Jun 11. Discovery of a novel and potent KRAS(G12V)-targeting peptide with antiproliferative activity against colorectal cancer cells. Zhang H(1), Yang S(2), Wang Y(2), Niu MM(2), She J(3). Author information: (1)Department of Hepatobiliary Surgery, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, China. (2)Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, Jiangsu, China. (3)Department of Gastrointestinal Surgery, Jintan Affiliated Hospital of Jiangsu University, Changzhou, Jiangsu, China. Despite the clinical relevance of KRASG12V in colorectal cancer, KRASG12V-specific inhibitors remain limited. Through structure-based virtual screening of a 59,319-member peptide library, we identified four KRASG12V-targeting peptides, among which Peptide-1 showed the most favourable docking profile. MST assays confirmed Peptide-1 had the highest affinity among Peptides 1-4, with stronger binding to KRASG12V than to other KRAS mutants. Structural analysis, molecular dynamics simulations, and free-energy calculations indicated that Peptide-1 formed a stable and energetically favourable complex with KRASG12V through extensive hydrogen bonding and hydrophobic interactions. Peptide-1 showed favourable human serum stability and cellular NanoBRET-supported engagement with KRASG12V. Functionally, Peptide-1 displayed potent antiproliferative activity in colorectal cancer cell lines, weaker effects on normal cells and reduced efficacy after KRASG12V knockdown. In SW480 cells, Peptide-1 was associated with reduced ERK1/2 phosphorylation, p21 upregulation, and G0/G1 accumulation. Overall, these findings support further investigation of Peptide-1 as a KRASG12V-targeting peptide for colorectal cancer drug discovery. DOI: 10.1080/14756366.2026.2684700 PMCID: PMC13262105 PMID: 42274165 [Indexed for MEDLINE] Conflict of interest statement: No potential conflict of interest was reported by the authors.

Mentions P21

AMD1-mediated polyamine metabolism governs tubular repair fate by restraining senescence after kidney injury.

1. Ren Fail. 2026 Dec;48(1):2680375. doi: 10.1080/0886022X.2026.2680375. Epub 2026 Jun 14. AMD1-mediated polyamine metabolism governs tubular repair fate by restraining senescence after kidney injury. Mao B(1)(2)(3), Zheng Z(1)(2)(3), Fu W(1)(2)(3), Cheng G(1)(2)(3), Wang L(1)(2), Bao J(1)(2), Liu X(4)(5), Zhan H(4)(5), Pan M(4)(5), Liu J(1)(2)(3). Author information: (1)Department of Nephrology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China. (2)Laboratory of Nephropathy, Translational Medicine Center, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China. (3)Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China. (4)Department of Nephrology, Ningde Municipal Hospital of Ningde Normal University, Ningde, China. (5)Department of Nephrology, Shanghai First People's Hospital Ningde Hospital, Ningde, China. Failure of adaptive repair after acute kidney injury (AKI) drives the transition to chronic kidney disease (CKD), yet the metabolic checkpoints governing tubular fate remain incompletely defined. Here, we investigated whether the polyamine biosynthetic enzyme S-adenosylmethionine decarboxylase 1 (AMD1) regulates tubular senescence and repair outcomes after AKI and elucidated the underlying mechanism. AMD1 dynamics were examined in an ischemia-reperfusion injury model using male C57BL/6J mice by immunofluorescence. AAV-mediated Ksp promoter-driven tubule-specific Amd1 conditional knockdown male mice (Amd1 cKD) were used to assess renal injury, cell-cycle status, senescence, and remodeling, and exogenous spermidine was administered for rescue. DNA damage signaling and p53/p21 activation were evaluated by immunostaining, Western blotting, and EdU incorporation assays. AMD1 was predominantly expressed in the tubular epithelium, with prominent dynamic induction in proximal tubules early after IRI, but declined to baseline levels during the late phase, representing a relative metabolic insufficiency that correlated inversely with fibrosis. Compared with wild-type controls, Amd1 cKD mice exhibited aggravated tubular injury, an over two-fold increase in SA-β-gal-positive areas, elevated p21, and reduced Ki67+ proliferation. Conversely, spermidine supplementation improved renal function, reduced fibrosis by 75.3%, and decreased senescent regions by 74%. Mechanistically, AMD1 deficiency increased γH2AX-marked DNA damage and activated the p53/p21 checkpoint, whereas spermidine attenuated this response and restored DNA synthesis capacity. Collectively, tubular AMD1 acts as a metabolic checkpoint that preserves polyamine homeostasis to restrain p53/p21-dependent senescence, promote adaptive repair after AKI, and spermidine supplementation represents a potential strategy to mitigate maladaptive AKI-to-CKD progression. DOI: 10.1080/0886022X.2026.2680375 PMCID: PMC13267046 PMID: 42289383 [Indexed for MEDLINE] Conflict of interest statement: No potential conflict of interest was reported by the author(s).

Mentions P21

Cost-effectiveness of tirzepatide versus semaglutide for patients with obesity or overweight in the US: evidence from the SURMOUNT-5 head-to-head phase-3 trial.

1. J Med Econ. 2026 Dec;29(1):1258-1278. doi: 10.1080/13696998.2026.2646078. Epub 2026 Apr 21. Cost-effectiveness of tirzepatide versus semaglutide for patients with obesity or overweight in the US: evidence from the SURMOUNT-5 head-to-head phase-3 trial. Johansson E(1), Wilding JPH(2)(3), Upadhyay N(1), van Hest N(4), Kirk M(5), Spaepen E(6), Zimner-Rapuch S(1), Annemans L(7), Bays H(8). Author information: (1)Eli Lilly and Company, Indianapolis, Indiana, USA. (2)Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK. (3)Clinical Sciences Centre, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK. (4)Costello Medical, Bristol, UK. (5)Costello Medical, Manchester, UK. (6)HaaPACS GmbH, Schriesheim, Germany. (7)Interuniversity Center of Health Economic Research (ICHER), Department of Public Health and Primary Care, Ghent University, Ghent, Belgium. (8)Louisville Metabolic and Atherosclerosis Research Center, Louisville, Kentucky, USA. PURPOSE: This study evaluated the cost-effectiveness (from the United States [US] societal perspective) of tirzepatide at its maximum-tolerated-dose (MTD) compared to semaglutide (MTD), both administered adjunct to a reduced-calorie diet and increased physical activity. The analysis focused on individuals with obesity (body mass index [BMI] ≥ 30 kg/m2), or overweight (BMI ≥27 to <30 kg/m2 + ≥1 obesity-related complication), using data from the head-to-head Phase-3 SURMOUNT-5 trial (patients without type 2 diabetes [T2D]). PATIENTS AND METHODS: This patient-level simulation modeling study assessed the cost and long-term clinical outcomes of tirzepatide (MTD) versus semaglutide (MTD), using data from the SURMOUNT-5 trial population. The modeled population were at risk of developing obesity-related complications including cardiovascular disease (CVD) and obstructive sleep apnea (OSA), amongst others. These outcomes were modeled using cardiometabolic parameters including weight, systolic blood pressure, high-density lipoprotein, glycated hemoglobin (HbA1c) and total cholesterol, by assessing their impact on healthcare and wider societal costs, quality of life, and mortality. Incremental cost-effectiveness ratios (ICERs; cost/quality-adjusted life year [QALY]) and incremental net health benefit (iNHBs) were calculated, and uncertainty was assessed through sensitivity and scenario analyses. RESULTS: Tirzepatide (MTD) was estimated to be less costly and more efficacious compared to semaglutide (MTD) with per patient cost savings of $41,688, 0.506 QALYs gained and positive iNHB of 0.784, indicating a net health benefit for tirzepatide. The model predicted that per 1,000 patients, 70 fewer patients will develop T2D, 10 fewer will develop CVD with tirzepatide (MTD) and patients spend 3.07 more years living with moderate/severe OSA when treated with semaglutide (MTD). CONCLUSION: Based on this simulation model, using head-to-head SURMOUNT-5 trial data, tirzepatide (MTD) had lower total costs and higher QALYs compared to semaglutide (MTD). This supports that tirzepatide (MTD) is a cost-effective treatment option for individuals with obesity or overweight compared to semaglutide (MTD). Plain Language Summary: This study focused on evaluating the cost-effectiveness of two weight management drugs, tirzepatide and semaglutide, for adults in the US who are overweight or have obesity. Using data from the SURMOUNT-5 trial, the analysis showed that tirzepatide was more effective and less costly, providing better weight loss and health benefits compared to semaglutide.The findings revealed that for every 1,000 individuals treated with tirzepatide, there were 70 fewer cases of type 2 diabetes and 10 fewer cases of heart disease compared to those treated with semaglutide. Additionally, patients on semaglutide experienced a longer duration living with moderate or severe sleep

Mentions Semaglutide

Enhancing economic modelling in obesity: integrating novel type 2 diabetes progression & obstructive sleep apnea remission - a UK case study.

1. J Med Econ. 2026 Dec;29(1):1111-1129. doi: 10.1080/13696998.2026.2646079. Epub 2026 Apr 22. Enhancing economic modelling in obesity: integrating novel type 2 diabetes progression & obstructive sleep apnea remission - a UK case study. Annemans L(1), Johansson E(2), Spaepen E(3), van Hest N(4), Grist J(5), Zimner-Rapuch S(2), Wilding JPH(6)(7). Author information: (1)Interuniversity Center of Health Economic Research (ICHER), Department of Public Health and Primary Care, Ghent University, Ghent, Belgium. (2)Eli Lilly and Company, Indianapolis, IN, USA. (3)HaaPACS GmbH, Schriesheim, Germany. (4)Costello Medical, Bristol, UK. (5)Costello Medical, London, UK. (6)Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK. (7)Clinical Sciences Centre, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK. PURPOSE: This study presents an updated health economic model for evaluating the long-term cost-effectiveness of interventions in overweight and obesity, integrating new clinical evidence from the SURMOUNT clinical trial programme and methodological advancements in type-2 diabetes and obstructive sleep apnea (OSA) modelling. PATIENTS AND METHODS: An updated individual patient simulation model evaluated the costs and long-term clinical outcomes of tirzepatide (5, 10, 15.0 mg) versus diet and exercise (D&E) alone in patients with a body mass index (BMI) ≥30 kg/m2 (obesity), or BMI ≥27 to <30 kg/m2 (overweight) + ≥1 obesity-related complication with a UK healthcare perspective. Key improvements over a previously published model were introduced, including modelling remission and progression of OSA, capturing realistic patterns of D&E discontinuation, incorporating HbA1c as a continuous cardiometabolic endpoint and transition to R-based implementation over VBA. Primary results include incremental cost-effectiveness ratios (ICERs; cost/QALY), costs, life years gained and quality-adjusted life years (QALYs). Secondary outcomes including clinical outcomes, random seed and cohort convergence, deterministic sensitivity results and run time were also calculated. RESULTS: The refined model predicted that all tirzepatide doses were cost-effective compared to D&E at a £20,000/QALY gained WTP (willingness-to-pay) threshold (ICERs: £8,327-£10,157). Refined estimation of long-term D&E discontinuation and OSA remission likely contributed to lower incremental costs, higher QALYs, and reduced ICERs compared with the previous model, aligning outcomes more closely with expected benefits from weight management treatment. Transitioning to R-based implementation reduced run time (e.g. by 4.52 h for deterministic sensitivity analyses) and enhanced model stability in all analyses conducted. CONCLUSION: This enhanced economic model represents a significant advancement in the evaluation of obesity pharmacotherapy, designed to enhance clinical relevance, technical robustness, and increase usability. It supports evidence-based decision-making for chronic weight management treatment in the UK, and beyond, while offering a scalable platform for future therapeutic evaluations. Plain Language Summary: In this study, researchers improved a computer model that estimates how weight-loss treatments affect people’s health and healthcare costs over their lifetime. The model focuses on adults in the UK who are overweight or have obesity and at least one related health condition. It compares treatment with tirzepatide plus diet and exercise to diet and exercise alone. It builds on an earlier model but includes several important updates based on new clinical evidence and feedback from experts.The updated model more accurately reflects real-world health changes by tracking how weight loss affects conditions such as obstructive sleep apnea (a condition where breathing repeatedly stops and starts during sleep) and type 2 diabetes over t

Mentions Tirzepatide

Sauchinone attenuates UVB-induced photoaging by suppressing oxidative stress and ferroptosis through activation of the Keap1-Nrf2 pathway in dermal fibroblasts.

1. Pharm Biol. 2026 Dec;64(1):764-782. doi: 10.1080/13880209.2026.2668138. Epub 2026 May 21. Sauchinone attenuates UVB-induced photoaging by suppressing oxidative stress and ferroptosis through activation of the Keap1-Nrf2 pathway in dermal fibroblasts. Zhang X(1)(2), Wang J(1)(2), Zhou Y(1)(2), Shen C(1)(2), Yuan M(1)(2), Li Q(1)(2), Li W(3). Author information: (1)Shanghai Qiran Biotechnology Co., Ltd, Shanghai, PR China. (2)Shanghai Jinjia Technology Co., Ltd, Shanghai, PR China. (3)Department of Dermatology, Shanghai Institute of Dermatology, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China. CONTEXT: Skin photoaging induced by chronic ultraviolet B (UVB) exposure is primarily driven by oxidative stress. Emerging evidence suggests that ferroptosis contributes to UVB-induced skin damage. Sauchinone, a phenolic lignan derived from Saururus chinensis, possesses potent antioxidant and anti-inflammatory properties; however, its protective effects and underlying mechanisms against UVB-induced skin damage remain unclear. OBJECTIVE: This study aimed to investigate the potential photoprotective effects and underlying mechanisms of sauchinone against UVB-induced skin damage in dermal fibroblasts. MATERIALS AND METHODS: UVB-induced HFFs were used as an in vitro model of photoaging. Cellular senescence, extracellular matrix (ECM) degradation, oxidative stress, and ferroptosis were evaluated using fluorescence staining, flow cytometry, qPCR, ELISA, and western blot analysis. RESULTS: Sauchinone significantly attenuated cellular senescence and ECM degradation in UVB-induced HFFs, as evidenced by reduced SA-β-gal activity and decreased expression of p16 and p21, increased COL1A1 levels, and decreased MMP1 levels. Sauchinone also alleviated oxidative stress by reducing intracellular ROS and MDA levels while restoring GSH content and antioxidant enzyme activity. In addition, sauchinone attenuated ferroptosis-related features, including reduced lipid ROS and Fe2+ accumulation, and normalized ACSL4, GPX4, FTH1, and SLC7A11 expression. Mechanistically, sauchinone was associated with activation of the Keap1-Nrf2 pathway, as evidenced by decreased Keap1 levels, enhanced nuclear translocation of Nrf2, and upregulation of downstream antioxidant genes. Importantly, pharmacological inhibition of Nrf2 using ML385 partially reversed the protective effects of sauchinone on oxidative stress, ferroptosis, cellular senescence, and ECM degradation. DISCUSSION AND CONCLUSIONS: Our findings revealed that sauchinone protected fibroblasts against UVB-induced photoaging by inhibiting oxidative stress and ferroptosis, potentially through activation of the Keap1-Nrf2 pathway. DOI: 10.1080/13880209.2026.2668138 PMCID: PMC13195707 PMID: 42165632 [Indexed for MEDLINE] Conflict of interest statement: The authors declare no conflicts of interest. The funders had no role in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the paper.

Mentions P21

Tranexamic acid protects human dermal fibroblasts from D-galactose-induced senescence via the GPR30/MAPK pathway.

1. Ann Med. 2026 Dec;58(1):2663263. doi: 10.1080/07853890.2026.2663263. Epub 2026 Apr 30. Tranexamic acid protects human dermal fibroblasts from D-galactose-induced senescence via the GPR30/MAPK pathway. Lin Y(1)(2)(3), Wang Y(1)(2), Wang W(1)(2)(3), Deng Z(1)(2)(3), Zhang Y(1)(2), Peng Y(1)(2), Tang J(1)(2)(3), Li J(1)(2)(3), Huang C(1)(2)(3)(4), Jian D(1)(2)(3). Author information: (1)Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China. (2)National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China. (3)Hunan Key Laboratory of ageing Biology, Xiangya Hospital, Central South University, Changsha, China. (4)Department of Dermatology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. BACKGROUND: Tranexamic acid (TXA) is widely used for pigmentary disorders, but its anti-ageing potential remains unclear. This study aimed to evaluate whether topical 3% TXA improves early periorbital wrinkles in women with facial melasma and to investigate whether TXA protects human dermal fibroblasts from D-galactose-induced senescence via the GPR30/MAPK pathway. METHODS: Fifty women with melasma were randomized to 3% TXA serum plus moisturizer or moisturizer alone for 8 weeks, with follow-up to week 12. Periorbital wrinkles were graded using a modified Fitzpatrick Wrinkle Scale (MFWS). Separately, D-gal-induced senescence in HDFs was assessed via viability, SA-β-gal activity, senescence markers, ROS, antioxidant enzymes, SASP/ECM gene expression, and MAPK activation. GPR30 involvement was examined using antagonist G15, shRNA knockdown, and molecular docking. RESULTS: Topical TXA produced significantly greater MFWS reductions versus moisturizer alone at weeks 4, 8, and 12, with benefit persisting post-treatment. In HDFs, TXA preserved viability, reduced SA-β-gal positivity, attenuated p21/p16, restored Lamin B1, decreased ROS, and rescued antioxidant activities. TXA downregulated IL-6, IL-8, MMP1, and MMP3, and suppressed D-gal-induced ERK, JNK, and p38 phosphorylation. These effects were weakened by G15 or GPR30 knockdown; docking supported a stable TXA-GPR30 interaction. CONCLUSIONS: TXA showed clinical anti-wrinkle activity in melasma patients and protected HDFs from D-gal-induced senescence, partly via GPR30-dependent modulation of oxidative stress, SASP/ECM expression, and MAPK signalling. TXA is a promising candidate for skin ageing intervention. DOI: 10.1080/07853890.2026.2663263 PMCID: PMC13134749 PMID: 42059427 [Indexed for MEDLINE] Conflict of interest statement: No potential conflict of interest was reported by the author(s).

Mentions P21

Lung microbiota dysbiosis mediates PM(2.5)-induced pulmonary inflammation through antibiotic-reversible mechanisms.

1. J Immunotoxicol. 2026 Dec;23(1):2660647. doi: 10.1080/1547691X.2026.2660647. Epub 2026 Apr 23. Lung microbiota dysbiosis mediates PM(2.5)-induced pulmonary inflammation through antibiotic-reversible mechanisms. Zheng Y(1), Zhang L(2)(3)(4), Tian J(2)(3)(4), Li N(2)(3)(4), Li Q(2)(3)(4), Li F(5), Meng J(5), Zhang Z(2)(6), Yun X(5), Duan S(1). Author information: (1)School of Public Health, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China. (2)Clinical Research Center for Obstetrics and Gynecology, Key Laboratory of Maternal & Fetal Medicine of National Health Commission of China, Shandong Provincial Maternal and Child Health Care Hospital Affiliated to Qingdao University, Jinan, China. (3)Shandong Provincial Key Medical and Health Laboratory of Women's Occupational Exposure and Fertility Preservation, Jinan, China. (4)Jinan (Preparatory) Key Laboratory of Women's Diseases and Fertility Preservation, Jinan, China. (5)School of Public Health, North China University of Science and technology, Tangshan, China. (6)School of Public Health, Qingdao University, Qingdao, China. Fine particulate matter (PM2.5) exposure contributes to over 4 million premature deaths annually, yet the mechanistic role of lung microbiota in PM2.5-induced pulmonary inflammation remains poorly understood. In collaboration of 16S rRNA and single-cell RNA multi-omics analysis and in vivo/in vitro experimental validation with antibiotic intervention strategies, the study here examined PM2.5-microbiota interactions in murine PM2.5 exposure models and cellular systems. It was found that PM2.5 exposure induced lung microbiota dysbiosis characterized by Gram-negative bacterial expansion, particularly Proteobacteria dominance, accompanied by reduced microbial diversity. scRNA analysis revealed coordinated activation of TLR4/MyD88/NLRP3 inflammatory signaling pathways and p53/p21/p16-mediated cell cycle arrest. Moreover, PM2.5 exposure activated NLRP3 inflammosome-dependent macrophage pyroptosis as evidenced by increased interleukin (IL)-1β, IL-18, caspase-1, and GSDMD expression. In vitro studies demonstrated that the inflammatory changes induced by PM2.5 exposure were statistically indistinguishable from those of LPS-positive controls, confirming endotoxin-like mechanisms. Critically, antibiotic pretreatment effectively attenuated PM2.5-induced inflammatory responses, cell cycle arrest, and tissue pathology, which established causality between microbiota disruption and pulmonary dysfunction. In conclusion, this study revealed lung microbiota dysbiosis as a critical mediator of PM2.5-induced pulmonary inflammation through Gram-negative bacterial expansion and subsequent endotoxin-like activation of inflammatory cascades, thereby providing novel mechanistic insights and potential microbiome-targeted therapeutic strategies for air pollution-associated respiratory diseases. DOI: 10.1080/1547691X.2026.2660647 PMID: 42024669 [Indexed for MEDLINE]

Mentions P21