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Specialty: Drugs & Pharmacology
Drug: Metformin

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Total 18 results found since Jan 2013.

Metformin ameliorates ferroptosis in cardiac ischemia and reperfusion by reducing NOX4 expression via promoting AMPK α
CONCLUSIONS: Met shows effectiveness in relieving ferroptosis in cardiac I/R. In the future, Met may be an effective drug for relieving ferroptosis in cardiac I/R patients clinically.PMID:37288723 | DOI:10.1080/13880209.2023.2212700
Source: Pharmaceutical Biology - June 8, 2023 Category: Drugs & Pharmacology Authors: Zhenhua Wu Yunpeng Bai Yujuan Qi Chao Chang Yan Jiao Yaobang Bai Zhigang Guo Source Type: research

Metformin alleviates lung-endothelial hyperpermeability by regulating cofilin-1/PP2AC pathway
Conclusion: Together, these data reveal the unprecedented endothelial cofilin-1/PP2AC signaling axis downstream of metformin in protecting against lung vascular endothelial injury and inflammation. Therefore, pharmacologically enhancing endothelial PP2AC activity may lead to the development of novel therapeutic approaches for prevention of deleterious effects of ALI on vascular ECs.
Source: Frontiers in Pharmacology - June 8, 2023 Category: Drugs & Pharmacology Source Type: research

Metformin attenuates fibroblast activation during pulmonary fibrosis by targeting S100A4 via AMPK-STAT3 axis
In this study, MET blocked α-smooth muscle actin (α-SMA) accumulation in vivo accompanied with S100A4 expression and STAT3 phosphorylation inhibition, resulting in attenuating the progression of lung fibrosis after BLM administration. We determined that S100A4 plays critical roles in fibroblasts activation in vitro, evidenced by siRNA knockdown of S100A4 expression downregulated TGF-β1 induced α-SMA production in Human fetal lung fibroblast (HFL1) cells. Importantly, we found for the first time that the expression of S100A4 in fibroblasts was regulated by STAT3. Stattic, an effective small molecule inhibitor of STAT3 p...
Source: Frontiers in Pharmacology - February 3, 2023 Category: Drugs & Pharmacology Source Type: research

Effects of metformin on Sonic hedgehog subgroup medulloblastoma progression: In vitro and in vivo studies
Metformin is a first-line drug for type 2 diabetes, and its anticancer effects have also been widely studied in recent years. The Sonic hedgehog (Shh) signaling pathway is involved in the initiation and progression of medulloblastoma. In order to develop a new treatment strategy for medulloblastoma (MB), this study investigated the inhibitory effect of metformin on MB and the underlying mechanism of metformin on the Shh signaling pathway. The effect of metformin on proliferation was evaluated by the cell counting kit-8 (CCK-8) test and colony formation experiment. The effect of metformin on metastasis was assessed by the s...
Source: Frontiers in Pharmacology - October 7, 2022 Category: Drugs & Pharmacology Source Type: research

Metformin Improves the Senescence of Renal Tubular Epithelial Cells in a High-Glucose State Through E2F1
In this study, we explored whether metformin improves a high-glucose-induced senescence and fibrosis of renal tubular epithelial cells through cell cycle-related protein E2F1. In the in vivo experiments, the recombinant adeno-associated virus (AAV-shE2F1) knockdown E2F1 gene was injected into the tail vein of 16-weeks-old db/db mice for 8 weeks. The 16-week-old db/db mice were administered metformin (260 mg/kg/d) continuously for 8 weeks. The normal control group (NC) and diabetic model group (DM) were set up simultaneously. Mice renal tubular epithelial cells (mRTECs) were cultured in vitro. The cells were randomly div...
Source: Frontiers in Pharmacology - June 23, 2022 Category: Drugs & Pharmacology Source Type: research

Acute Administration of Metformin Protects Against Neuronal Apoptosis Induced by Cerebral Ischemia-Reperfusion Injury via Regulation of the AMPK/CREB/BDNF Pathway
Metformin is a first-line anti-diabetic agent with a powerful hypoglycemic effect. Several studies have reported that metformin can improve the prognosis of stroke patients and that this effect is independent of its hypoglycemic effect; however, the specific mechanism remains unclear. In this research, we explored the effect and specific mechanism of metformin in cerebral ischemia-reperfusion (I/R) injury by constructing a transient middle cerebral artery occlusion model in vivo and a glucose and oxygen deprivation/reoxygenation (OGD/R) model in vitro. The results of the in vivo experiments showed that acute treatment with...
Source: Frontiers in Pharmacology - April 1, 2022 Category: Drugs & Pharmacology Source Type: research

Metformin-conjugated micellar system with intratumoral pH responsive de-shielding for co-delivery of doxorubicin and nucleic acid.
Abstract A novel PMet-P(cdmPEG2K) polymeric micellar carrier was developed for tumor-targeted co-delivery of DOX and nucleic acids (NA), based on polymetformin and a structure designed to lose the PEG shell in response to the acidic extracellular tumor environment. NA/DOX co-loaded micelleplexes exhibited enhanced inhibition of cell proliferation compared to DOX-loaded micelles, and displayed a higher level of cytotoxicity at an acidic pH (6.8) which mimicks the tumor microenvironment. The PMet-P(cdmPEG2K) micelles achieved significantly improved transfection with either a reporter plasmid or Cy3-siRNA, and enhanc...
Source: Biochemical Pharmacology - February 2, 2021 Category: Drugs & Pharmacology Authors: Liu Y, Sun J, Huang Y, Chen Y, Li J, Liang L, Xu J, Wan Z, Zhang B, Li Z, Li S Tags: Biochem Pharmacol Source Type: research

Metformin alleviates hydrogen peroxide-induced inflammation and oxidative stress via inhibiting P2X7R signaling in spinal cord tissue cells neurons.
In conclusion, our results show that metformin can alleviate H2O2-induced inflammation and oxidative stress via modulating the P2X7R signaling pathway. PMID: 33201730 [PubMed - as supplied by publisher]
Source: Canadian Journal of Physiology and Pharmacology - November 17, 2020 Category: Drugs & Pharmacology Authors: Wang G, Chen S, Shao Z, Li Y, Wang W, Mao L, Li J, Mei X Tags: Can J Physiol Pharmacol Source Type: research

Metformin Mitigates Cartilage Degradation by Activating AMPK/SIRT1-Mediated Autophagy in a Mouse Osteoarthritis Model
Chondrocyte dysfunction is a key mechanism underlying osteoarthritis. Metformin has shown protective effects in many diseases. The present study aimed to investigate the effects of metformin on autophagy and apoptosis in the process of osteoarthritis. A mouse osteoarthritis model was set up by surgically destabilizing medial meniscus in the knee. Intraarticular injection of metformin or vehicle was applied in the right knee for eight weeks. Mouse articular chondrocytes were isolated and passaged for in vitro experiments. Small interfering RNA (siRNA) transfection was used to silence target genes. Western blotting, immunohi...
Source: Frontiers in Pharmacology - July 23, 2020 Category: Drugs & Pharmacology Source Type: research

Metformin reduced NLRP3 inflammasome activity in Ox-LDL stimulated macrophages through adenosine monophosphate activated protein kinase and protein phosphatase 2A.
Abstract Metformin has been suggested to have cardiovascular protective effects. Previous researches showed that metformin activates Adenosine Monophosphate Activated Protein Kinase (AMPK) and Protein Phosphatase 2A (PP2A). This research aimed to elucidate whether and how metformin affects NLR Family Pyrin Domain Containing 3 (NLRP3) inflammasome activity in oxidized low-density lipoprotein (ox-LDL) stimulated macrophages. Macrophages were treated with ox-LDL and metformin in a continuous manner, and NLRP3 inflammasome activation was evaluated by detecting IL-1β and caspase-1 p10 release by ELISA and western blot...
Source: European Journal of Pharmacology - March 5, 2019 Category: Drugs & Pharmacology Authors: Zhang L, Lu L, Zhong X, Yue Y, Hong Y, Li Y, Li Y Tags: Eur J Pharmacol Source Type: research

Metformin attenuates angiotensin II ‐induced TGFβ1 expression by targeting hepatocyte nuclear factor 4α
Conclusions and ImplicationsHNF4α mediated AngII‐induced TGFβ1 transcription and cardiac fibrosis. Metformin inhibited AngII‐induced HNF4α expression via AMPK activation, thus decreasing TGFβ1 transcription and cardiac fibrosis. These findings reveal a novel antifibrotic mechanism of action of metformin and identify HNF4α as a new potential therapeutic target for cardiac fibrosis.
Source: British Journal of Pharmacology - February 23, 2017 Category: Drugs & Pharmacology Authors: Ruifei Chen, Yenan Feng, Jimin Wu, Yao Song, Hao Li, Qiang Shen, Dan Li, Jianshu Zhang, Zhizhen Lu, Han Xiao, Youyi Zhang Tags: RESEARCH PAPER THEMED ISSUE Source Type: research

Activation of AMPK α2 inhibits airway smooth muscle cells proliferation.
Abstract The aims of the present study were to examine the effect of adenosine monophosphate-activated protein kinase (AMPK) activation on airway smooth muscle cells (ASMCs) proliferation and to address its potential mechanisms. Platelet derived growth factor (PDGF) activated phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) signaling pathway, and this in turn up-regulated S-phase kinase-associated protein 2 (Skp2) and consequently reduced cyclin dependent kinase inhibitor 1B (p27) leading to ASMCs proliferation. Pre-incubation of cells with metformin, an AMPK activat...
Source: European Journal of Pharmacology - September 2, 2016 Category: Drugs & Pharmacology Authors: Liu L, Pan Y, Song Y, Su X, Ke R, Yang L, Gao L, Li M Tags: Eur J Pharmacol Source Type: research

Metformin induces PGC‐1α expression and selectively affects hepatic PGC‐1α functions
Conclusions and ImplicationsDownregulation of PGC‐1α is not necessary for suppression of gluconeogenic genes by metformin. Importantly, metformin selectively regulates hepatic PGC‐1α‐mediated gene regulation and prevents activation of gluconeogenesis, but leaves regulation of mitochondrial genes intact. Our results thus identify selective modulation of hepatic PGC‐1α functions as a novel mechanism involved in the therapeutic action of metformin.
Source: British Journal of Pharmacology - January 16, 2014 Category: Drugs & Pharmacology Authors: Sanna‐Mari Aatsinki, Marcin Buler, Henriikka Salomäki, Markku Koulu, Petr Pavek, Jukka Hakkola Tags: Research Paper Source Type: research