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Total 133 results found since Jan 2013.

Hyperglycaemia-induced resistance to Docetaxel is negated by metformin: a role for IGFBP-2
The incidence of many common cancers varies between different populations and appears to be affected by a Western lifestyle. Highly proliferative malignant cells require sufficient levels of nutrients for their anabolic activity. Therefore, targeting genes and pathways involved in metabolic pathways could yield future therapeutics. A common pathway implicated in energetic and nutritional requirements of a cell is the LKB1/AMPK pathway. Metformin is a widely studied anti-diabetic drug, which improves glycaemia in patients with type 2 diabetes by targeting this pathway. We investigated the effect of metformin on prostate can...
Source: Endocrine-Related Cancer - November 20, 2016 Category: Endocrinology Authors: Biernacka, K. M., Persad, R. A., Bahl, A., Gillatt, D., Holly, J. M. P., Perks, C. M. Tags: Research Source Type: research

Polychlorinated biphenyls exposure-induced insulin resistance is mediated by lipid droplet enlargement through Fsp27.
This study suggests that PCB exposure-induced insulin resistance is mediated by LD enlargement through Fsp27. PMID: 27837308 [PubMed - as supplied by publisher]
Source: Archives of Toxicology - November 10, 2016 Category: Toxicology Authors: Kim HY, Kwon WY, Kim YA, Oh YJ, Yoo SH, Lee MH, Bae JY, Kim JM, Yoo YH Tags: Arch Toxicol Source Type: research

Metformin potentiates anti-tumor effect of resveratrol on pancreatic cancer by down-regulation of VEGF-B signaling pathway.
Authors: Zhu M, Zhang Q, Wang X, Kang L, Yang Y, Liu Y, Yang L, Li J, Yang L, Liu J, Li Y, Zu L, Shen Y, Qi Z Abstract Our previous study showed that resveratrol (RSV) exhibited not only anti-tumor effect, but also had potential tumor promotion effect on pancreatic cancer (Paca) cells through up-regulation of VEGF-B. We determined whether metformin (MET) could potentiate the anti-tumor effect of RSV on PaCa in this study. Combination of RSV (100 μmol/l) and MET (20 mmol/l) significantly inhibited tumor growth and increased apoptosis of human PaCa in comparison with RSV or MET alone treatment in PaCa cell lines (Mi...
Source: Oncotarget - October 6, 2016 Category: Cancer & Oncology Tags: Oncotarget Source Type: research

Reversal of multidrug resistance of hepatocellular carcinoma cells by metformin through inhibiting NF- κB gene transcription.
CONCLUSION: Metformin via silencing NF-κB signaling could effectively reverse MDR of HCC cells by down-regulating MDR1/P-gp expression. PMID: 27621764 [PubMed]
Source: World Journal of Hepatology - September 15, 2016 Category: Gastroenterology Tags: World J Hepatol 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

TRAIL restores DCA/metformin-mediated cell death in hypoxia.
Abstract Previous studies have shown that hypoxia can reverse DCA/metformin-induced cell death in breast cancer cells. Therefore, targeting hypoxia is necessary for therapies targeting cancer metabolism. In the present study, we found that TRAIL can overcome the effect of hypoxia on the cell death induced by treatment of DCA and metformin in breast cancer cells. Unexpectedly, DR5 is upregulated in the cells treated with DCA/metformin, and sustained under hypoxia. Blocking DR5 by siRNA inhibited DCA/metformin/TRAIL-induced cell death, indicating that DR5 upregulation plays an important role in sensitizing cancer ce...
Source: Biochemical and Biophysical Research communications - August 24, 2016 Category: Biochemistry Authors: Hong SE, Kim CS, An S, Kim HA, Hwang SG, Song JY, Lee JK, Hong J, Kim JI, Noh WC, Jin HO, Park IC Tags: Biochem Biophys Res Commun Source Type: research

Metformin elicits antitumor effects and downregulates the histone methyltransferase multiple myeloma SET domain (MMSET) in prostate cancer cells
CONCLUSIONSThese data suggest MMSET may play a role in the inhibitory effect of metformin on PCa and could serve as a potential novel therapeutic target for PCa. Prostate © 2016 Wiley Periodicals, Inc.
Source: The Prostate - July 11, 2016 Category: Urology & Nephrology Authors: Nicole M. A. White‐Al Habeeb, Julia Garcia, Neil Fleshner, Bharati Bapat Tags: Original Article Source Type: research

The roles of tricellular tight junction protein lipolysis-stimulated lipoprotein receptor in malignancy of human endometrial cancer cells.
Authors: Shimada H, Satohisa S, Kohno T, Takahashi S, Hatakeyama T, Konno T, Tsujiwaki M, Saito T, Kojima T Abstract Lipolysis-stimulated lipoprotein receptor (LSR) has been identified as a novel molecular constituent of tricellular contacts that have a barrier function for the cellular sheet. LSR recruits tricellulin (TRIC), which is the first molecular component of tricellular tight junctions. Knockdown of LSR increases cell motility and invasion of certain cancer cells. However, the behavior and the roles of LSR in endometrial cancer remain unknown. In the present study, we investigated the behavior and roles of...
Source: Oncotarget - April 3, 2016 Category: Cancer & Oncology Tags: Oncotarget Source Type: research

Activation of autophagy flux by metformin downregulates cellular FLICE-like inhibitory protein and enhances TRAIL- induced apoptosis.
In this study, we demonstrated that metformin could induce TRAIL-mediated apoptotic cell death in TRAIL-resistant human lung adenocarcinoma A549 cells. Pretreatment of metformindownregulation of c-FLIP and markedly enhanced TRAIL-induced tumor cell death by dose-dependent manner. Treatment with metformin resulted in slight increase in the accumulation of microtubule-associated protein light chain LC3-II and significantly decreased the p62 protein levels by dose-dependent manner indicated that metformin induced autophagy flux activation in the lung cancer cells. Inhibition of autophagy flux using a specific inhibitor and ge...
Source: Oncotarget - March 19, 2016 Category: Cancer & Oncology Tags: Oncotarget Source Type: research

Tristetraprolin mediates the anti-proliferative effects of metformin in breast cancer cells
Abstract Metformin, which is a drug commonly prescribed to treat type 2 diabetes, has anti-proliferative effects in cancer cells; however, the molecular mechanisms underlying this effect remain largely unknown. The aim is to investigate the role of tristetraprolin (TTP), an AU-rich element-binding protein, in anti-proliferative effects of metformin in cancer cells. p53 wild-type and p53 mutant breast cancer cells were treated with metformin, and expression of TTP and c-Myc was analyzed by semi-quantitative RT-PCR, Western blots, and promoter activity assay. Breast cancer cells were transfected with siRNA against T...
Source: Breast Cancer Research and Treatment - March 8, 2016 Category: Cancer & Oncology Source Type: research

Metformin inhibits growth of human non-small cell lung cancer cells via liver kinase B-1-independent activation of adenosine monophosphate-activated protein kinase.
Authors: Guo Q, Liu Z, Jiang L, Liu M, Ma J, Yang C, Han L, Nan K, Liang X Abstract Metformin, the most widely administered oral anti‑diabetic therapeutic agent, exerts its glucose-lowering effect predominantly via liver kinase B1 (LKB1)-dependent activation of adenosine monophosphate-activated protein kinase (AMPK). Accumulating evidence has demonstrated that metformin possesses potential antitumor effects. However, whether the antitumor effect of metformin is via the LKB1/AMPK signaling pathway remains to be determined. In the current study, the effects of metformin on proliferation, cell cycle progression, and...
Source: Molecular Medicine Reports - February 9, 2016 Category: Molecular Biology Tags: Mol Med Rep Source Type: research

PGC-1 mediates the regulation of metformin in muscle irisin expression and function.
CONCLUSION: Our study demonstrates that Metformin stimulates irisin secretion from skeletal muscle into the circulation system of obese mice, and that PGC-1α is a critical regulator in this process. PMID: 26692929 [PubMed]
Source: American Journal of Translational Research - December 26, 2015 Category: Research Tags: Am J Transl Res Source Type: research

Anti-cancer effect of metformin by suppressing signaling pathway of HER2 and HER3 in tamoxifen-resistant breast cancer cells
Abstract Development of new therapeutic strategies is becoming increasingly important to overcome tamoxifen resistance. Recently, much interest has been focused on anti-tumor effects of metformin commonly used to treat type II diabetes. Increased protein expression and signaling of epidermal growth factor receptor (EGFR) family is a possible mechanism involved in tamoxifen resistance. Since HER2/HER3 heterodimers are able to induce strong downstream signaling and activate various biological responses such as cellular proliferation and growth, we investigated the anti-cancer effect of metformin by inhibition of sig...
Source: Tumor Biology - November 18, 2015 Category: Cancer & Oncology Source Type: research

AMP-activated protein kinase suppresses the expression of LXR/SREBP-1 signaling-induced ANGPTL8 in HepG2 cells
Publication date: 15 October 2015 Source:Molecular and Cellular Endocrinology, Volume 414 Author(s): Jinmi Lee, Seok-Woo Hong, Se Eun Park, Eun-Jung Rhee, Cheol-Young Park, Ki-Won Oh, Sung-Woo Park, Won-Young Lee ANGPTL8 is a liver-derived secretory protein that leads to elevated serum triglyceride and the level of circulating ANGPTL8 is strongly associated with obesity and diabetes. Here we investigated the mechanisms of activation and inhibition of ANGPTL8 expression in hepatocytes. The expression of ANGPTL8 was significantly increased in HepG2 cells exposed to palmitic acid, tunicamycin, or T0901317, and was r...
Source: Molecular and Cellular Endocrinology - August 8, 2015 Category: Endocrinology Source Type: research

Abstract 16: Combination simvastatin and metformin induces G1-phase cell cycle arrest and Ripk1- and Ripk3-dependent necroptosis in C4-2B osseous metastatic castration-resistant prostate cancer cells
Castration-resistant prostate cancer (CRPC) cells acquire resistance to chemotherapy and apoptosis in part due to enhanced aerobic glycolysis and biomass production, known as Warburg effect. We previously demonstrated that combination simvastatin (SIM) and metformin (MET) ameliorates critical Warburg effect-related metabolic aberrations of C4-2B cells, synergistically and significantly decreases CRPC cell viability and metastatic properties, with minimal effect on normal prostate epithelial cells, and inhibits primary prostate tumor growth, metastasis, and biochemical failure in an orthotopic model of metastatic CRPC, more...
Source: Cancer Research - August 2, 2015 Category: Cancer & Oncology Authors: Babcook, M. A., Sramkoski, R. M., Fujioka, H., Daneshgari, F., Almasan, A., Shukla, S., Gupta, S. Tags: Molecular and Cellular Biology Source Type: research