Individual skeletal muscles in the animal body are heterogeneous, as each is comprised of different fiber types. Type I muscle fibers are rich with mitochondria, and have high oxidative metabolisms while type IIB fibers have few mitochondria and high glycolytic metabolic capacity. Peroxisome proliferator-activated receptor gamma coactivator 1α (PGC-1α), a transcriptional co-activator that regul...

Slow-twitch muscles, devoted to postural maintenance, experience atrophy and weakness during muscle disuse due to bed-rest, aging or spaceflight. These conditions impair motion activities and can have survival implications. Human and animal studies demonstrate the anabolic role of IGF-1 on skeletal muscle suggesting its interest as a muscle disuse countermeasure. Thus, we tested the role of IGF...

The intestine is a major target organ in hemorrhagic shock (HS)-induced tissue injury. Hypoxia-inducible factor (HIF)-1α is the primary transcription factor responsible for regulating cellular response to changes in oxygen tension. Since HS is an acute hypoxic insult, the present study examined changes in the gene expression of HIF-1α in various regions of the intestine, as well as the distribu...

Enzalutamide is a potent second-generation androgen receptor (AR) antagonist with activity in metastatic castrate-resistant prostate cancer (CRPC). Although enzalutamide is initially effective, disease progression inevitably ensues with the emergence of resistance. Intratumoral hypoxia is also associated with CRPC progression and treatment resistance. Given that both AR and hypoxia inducible fa...

The peroxisome proliferator-activated receptor γ (PPARγ) coactivator 1α (PGC-1α) is a highly-inducible transcriptional coactivator implicated in the coordinate regulation of genes encoding enzymes involved in hepatic fatty acid oxidation, oxidative phosphorylation, and gluconeogenesis. The present study sought to assess the effects of chronic PGC-1α deficiency on metabolic flux through the hepa...

Background. The radioresistance of glioma stem cells (GSCs) is related to some microRNAs (miRs) generated by radiation. This study aimed investigate the effects miR-17-5p and miR-130b-3p on radiosensitivity GSCs. Methods. expressions in SU3 SU3-5R were determined. transfected with or mimics inhibitors used determine cell viability after irradiation as well examine changes supernatant glucose, i...

Background: Type 2 diabetic patients have an abnormally high rate of mortality due to cardiovascular diseases. Given the adverse impact of diabetes on in heart cells and the role of exercise on mitochondrial biogenesis signaling, this study investigated the effect of eight weeks of aerobic exercise on PGC-1a and SIRT-1 gene expression in the myocardium of diabetic male Wistar rats. Materials a...

ERR (oestrogen-related receptor)-α modulates the oestrogen signalling pathway and regulates genes participating in the physiological energy balance programme. Oestrogen and PGC-1α (peroxisome proliferator-activated receptor-γ coactivator-1α), the master regulator of the energy homoeostasis programme, both regulate the expression of ERRα through the MHRE (multihormone response element) of the ER...

objective: hypoxia-inducible factor (hif)-1 plays an essential role in the body’s response to low oxygen concentrations and regulates expression of several genes implicated in homeostasis, vascularization, anaerobic metabolism as well as immunological responses. increased levels of hif-1α are associated with increased proliferation and more aggressive breast tumor development. lactobacilli have...