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PGC-1 alpha

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https://www.readbyqxmd.com/read/27916422/pgc-1-alpha-interacts-with-microrna-217-to-functionally-regulate-breast-cancer-cell-proliferation
#1
Shaohui Zhang, Xinguo Liu, Jianming Liu, Heng Guo, Hongfeng Xu, Geng Zhang
BACKGROUND: In this study, we explored the functional mechanism of PPARg co-activator 1-alpha (PGC-1α) in regulating miR-217-mediated breast cancer development in vitro. METHODS: Dual-luciferase activity assay was applied to examine the binding of miR-217 on PGC-1α gene. Breast cancer cell lines, MCF-7 and MDA-MB-231 were infected by lentivirus to constitutively downregulate miR-217. Its regulation on PGC-1α expression was investigated by qRT-PCR and western blot...
December 1, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27909049/control-of-secreted-protein-gene-expression-and-the-mammalian-secretome-by-the-metabolic-regulator-pgc-1%C3%AE
#2
Neri Minsky, Robert G Roeder
Secreted proteins serve pivotal roles in the development of multicellular organisms, acting as structural matrix, extracellular enzymes and signal molecules. However, how the secretome is regulated remains incompletely understood. Here we demonstrate, unexpectedly, that peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α), a critical transcriptional co-activator of metabolic gene expression, functions to down-regulate expression of diverse genes encoding secreted molecules and extracellular matrix (ECM) components to modulate the secretome...
December 1, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27903512/thyroid-hormone-stimulated-increases-in-pgc-1%C3%AE-and-ucp2-promote-life-history-specific-endocrine-changes-and-maintain-a-lipid-based-metabolism
#3
Bridget Martinez, José G Soñanez-Organis, Jose A Godoy-Lugo, Lillian Horin, Daniel E Crocker, Rudy M Ortiz
Thyroid hormones (TH) regulate metabolism, but are typically suppressed during times of stressful physiological conditions, including fasting. Interestingly, prolonged fasting in northern elephant seal pups is associated with reliance on a lipid-based metabolism and increased levels of circulating thyroid hormones that are partially attributed to active secretion as opposed to reduced clearance. This apparent paradox is coupled with complementary increases in cellular TH-mediated activity suggesting that in mammals naturally adapted to prolonged fasting TH are necessary to support metabolism...
November 30, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27896503/effect-of-pgc-1%C3%AE-overexpression-or-silencing-on-mitochondrial-apoptosis-of-goat-luteinized-granulosa-cells
#4
Guo-Min Zhang, Ming-Tian Deng, Yan-Li Zhang, Yi-Xuan Fan, Yong-Jie Wan, Hai-Tao Nie, Zi-Yu Wang, Feng Wang, Zhi-Hai Lei
During goat follicular development, abnormal expression of peroxisome proliferator- activated receptor gamma coactivator-1 alpha (PGC-1α) in granulosa cells (GCs) may contribute to follicular atresia with unknown regulatory mechanisms. In this study, we investigate the effect of ectopic expression or interference of PGC-1α on cell apoptosis of goat first passage granulosa cells (FGCs) in vitro. The results indicate that PGC-1α silencing by short hairpin RNA (shRNA) in goat FGCs significantly reduced mitochondrial DNA (mtDNA) copy number (P < 0...
November 28, 2016: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/27834877/sugar-composition-analysis-of-fuzi-polysaccharides-by-hplc-ms-n-and-their-protective-effects-on-schwann-cells-exposed-to-high-glucose
#5
Bei-Bei Wang, Jia-Li Wang, Jiang Yuan, Qing-Hua Quan, Rui-Fang Ji, Peng Tan, Jing Han, Yong-Gang Liu
Fuzi has been used to treat diabetic complications for many years in china. In a previous study, we have shown that Fuzi aqueous extract can attenuate Diabetic peripheral neuropathy (DPN) in rats and protect Schwann cells from injury. Thus, the protective effect of Fuzi polysaccharides (FPS) on high glucose-induced SCs and the preliminary mechanism were investigated. Firstly, the FPS were obtained and their monose composition was analyzed by the combination of pre-column derivatization and high performance liquid chromatography coupled with electrospray ionization multi-tandem mass spectrometry (HPLC/ESI-MS(n))...
November 9, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27735783/abundance-in-proteins-expressed-after-functional-electrical-stimulation-cycling-or-arm-cycling-ergometry-training-in-persons-with-chronic-spinal-cord-injury
#6
Ashraf S Gorgey, Zachary A Graham, William A Bauman, Christopher Cardozo, David R Gater
STUDY DESIGN: Longitudinal design. OBJECTIVES: The study determined the effects of two forms of exercise training on the abundance of two proteins, (glucose transporter-4 [GLUT-4], adenosine monophosphate kinase [AMPK]) involved in glucose utilization and the transcriptional coactivator that regulates the genes involved in energy metabolism and mitochondrial biogenesis (peroxisome proliferator-activated receptor (PPAR) coactivator 1 alpha [PGC-1α]), in muscles in men with chronic motor-complete spinal cord injury (SCI)...
October 13, 2016: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/27686000/different-training-induced-skeletal-muscle-adaptations-in-copd-patients-with-and-without-alpha-1-antitrypsin-deficiency
#7
Inga Jarosch, Sebastian Gehlert, Daniel Jacko, Rembert Andreas Koczulla, Marion Wencker, Tobias Welte, Wilhelm Bloch, Sabina Janciauskiene, Klaus Kenn
BACKGROUND: Pulmonary rehabilitation (PR) improves oxidative capacity of peripheral muscles in patients with chronic obstructive pulmonary disease (COPD). The exercise-induced oxidative skeletal muscle adaptation in COPD patients with inherited alpha-1 antitrypsin deficiency (A1ATD) has not been studied. OBJECTIVES: To compare PR effects on skeletal muscle adaptation in COPD patients with and without A1ATD. METHODS: Nine COPD patients with A1ATD (genotype PiZZ, 6 receiving A1AT augmentation therapy), and 10 'usual' COPD patients (genotype PiMM) performed an incremental cycling test and underwent musculus vastus lateralis biopsies before and after a 3-week PR program including exercise training...
2016: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/27638713/gene-therapy-targeting-mitochondrial-pathway-in-parkinson-s-disease
#8
Chi-Jing Choong, Hideki Mochizuki
Parkinson's disease (PD) presents a relative selective localization of pathology to substantia nigra and well-defined motor symptoms caused by dopaminergic degeneration that makes it an ideal target for gene therapy. Parallel progress in viral vector systems enables the delivery of therapeutic genes directly into brain with reasonable safety along with sustained transgene expression. To date, gene therapy for PD that has reached clinical trial evaluation is mainly based on symptomatic approach that involves enzyme replacement strategy and restorative approach that depends on the addition of neurotrophic factors...
September 16, 2016: Journal of Neural Transmission
https://www.readbyqxmd.com/read/27637001/eicosapentaenoic-acid-promotes-mitochondrial-biogenesis-and-beige-like-features-in-subcutaneous-adipocytes-from-overweight-subjects
#9
L M Laiglesia, S Lorente-Cebrián, P L Prieto-Hontoria, M Fernández-Galilea, S M R Ribeiro, N Sáinz, J A Martínez, M J Moreno-Aliaga
Eicosapentaenoic acid (EPA), a n-3 long-chain polyunsaturated fatty acid, has been reported to have beneficial effects in obesity-associated metabolic disorders. The objective of the present study was to determine the effects of EPA on the regulation of genes involved in lipid metabolism, and the ability of EPA to induce mitochondrial biogenesis and beiging in subcutaneous adipocytes from overweight subjects. Fully differentiated human subcutaneous adipocytes from overweight females (BMI: 28.1-29.8kg/m(2)) were treated with EPA (100-200 μM) for 24 h...
August 26, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27614713/effects-of-alpha-melanocyte-stimulating-hormone-on-mitochondrial-energy-metabolism-in-rats-of-different-age-groups
#10
René G Feichtinger, Erika Pétervári, Michaela Zopf, Silvia Vidali, Sepideh Aminzadeh-Gohari, Johannes A Mayr, Barbara Kofler, Márta Balaskó
Hypothalamic alpha-melanocyte-stimulating hormone (α-MSH) is a key catabolic mediator of energy homeostasis. Its anorexigenic and hypermetabolic effects show characteristic age-related alterations that may be part of the mechanism of middle-aged obesity and geriatric anorexia/cachexia seen in humans and other mammals. We aimed to investigate the role of α-MSH in mitochondrial energy metabolism during the course of aging in a rodent model. To determine the role of α-MSH in mitochondrial energy metabolism in muscle, we administered intracerebroventricular (ICV) infusions of α-MSH for 7-days to different age-groups of male Wistar rats...
August 26, 2016: Neuropeptides
https://www.readbyqxmd.com/read/27601998/mitochondrial-and-metabolic-gene-expression-in-the-aged-rat-heart
#11
Gregory P Barton, Joseph J Sepe, Susan H McKiernan, Judd M Aiken, Gary M Diffee
Aging is associated with a decline in cardiac function. Exercise intervention has been suggested as a way to improve this decrement. Age-related decline in cardiac function is associated with decreases in fatty acid oxidation, mitochondrial function, and AMP-activated protein kinase (AMPK) activity. The molecular mechanisms involved with age-related changes in mitochondrial function and substrate metabolism are poorly understood. We determined gene expression differences in hearts of Young (6 mo), Old (33 mo), and old exercise trained (Old + EXE) (34 mo) FBN rats, using Qiagen PCR arrays for Glucose, Fatty acid, and Mitochondrial metabolism...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27601924/knockdown-of-peroxisome-proliferator-activated-receptor-gamma-coactivator-1-alpha-increased-apoptosis-of-human-endometrial-cancer-hec-1a-cells
#12
Hui Yang, Rui Yang, Hao Liu, Zhongqian Ren, Cuicui Wang, Da Li, Xiaoxin Ma
BACKGROUND: Peroxisome proliferator-activated receptor gamma coactivator-1 alpha (PGC-1α) coactivates multiple transcription factors and regulates several metabolic processes. In this study, we focused on the roles of PGC-1α in the apoptosis of endometrial cancer HEC-1A cells. MATERIALS AND METHODS: PGC-1a expression in the HEC-1A cells was detected with real-time polymerase chain reaction and Western blot. Small interfering RNA directed against PGC-1α was designed and synthesized, and RNA interference technology was used to knock down PGC-1α mRNA and protein expression...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27502839/the-role-of-mtor-signalling-in-the-regulation-of-skeletal-muscle-mass-in-a-rodent-model-of-resistance-exercise
#13
Riki Ogasawara, Satoshi Fujita, Troy A Hornberger, Yu Kitaoka, Yuhei Makanae, Koichi Nakazato, Ishii Naokata
Resistance exercise (RE) activates signalling by the mammalian target of rapamycin (mTOR), and it has been suggested that rapamycin-sensitive mTOR signalling controls RE-induced changes in protein synthesis, ribosome biogenesis, autophagy, and the expression of peroxisome proliferator gamma coactivator 1 alpha (PGC-1α). However, direct evidence to support the aforementioned relationships is lacking. Therefore, in this study, we investigated the role of rapamycin-sensitive mTOR in the RE-induced activation of muscle protein synthesis, ribosome biogenesis, PGC-1α expression and hypertrophy...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27424777/lack-of-age-related-clinical-progression-in-pgc-1%C3%AE-deficient-mice-implications-for-mitochondrial-encephalopathies
#14
Levente Szalardy, Mate Molnar, Rita Torok, Denes Zadori, Gabor G Kovacs, Laszlo Vecsei, Peter Klivenyi
Impaired peroxisome proliferator-activated receptor-gamma coactivator 1-alpha (PGC-1α) function has been demonstrated in several neurodegenerative diseases, and murine whole-body knockouts of PGC-1α have been considered as models for Huntington's disease. Recent neuropathological studies, however, rather propose these animals to be morphological models of mitochondrial encephalopathies, with special reminiscence of Kearns-Sayre syndrome. PGC-1α-deficient animals have already been subjected to behavioral assessments; however, the contradictory findings and the paucity of data assessing long-term progression necessitated further examinations...
October 15, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27418542/pgc-1-alpha-regulates-ho-1-expression-mitochondrial-dynamics-and-biogenesis-role-of-epoxyeicosatrienoic-acid
#15
Shailendra P Singh, Joseph Schragenheim, Jian Cao, John R Falck, Nader G Abraham, Lars Bellner
BACKGROUND/OBJECTIVES: Obesity is a risk factor in the development of type 2 diabetes mellitus (DM2), which is associated with increased morbidity and mortality, predominantly as a result of cardiovascular complications. Increased adiposity is a systemic condition characterized by increased oxidative stress (ROS), increased inflammation, inhibition of anti-oxidant genes such as HO-1 and increased degradation of epoxyeicosatrienoic acids (EETs). We previously demonstrated that EETs attenuate mitochondrial ROS...
September 2016: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/27363784/t-2-toxin-inhibits-murine-es-cells-cardiac-differentiation-and-mitochondrial-biogenesis-by-ros-and-p-38-mapk-mediated-pathway
#16
Haiqin Fang, Liangzi Cong, Yuan Zhi, Haibin Xu, Xudong Jia, Shuangqing Peng
OBJECTIVE: To investigate the effect of T-2 toxin on murine embryonic stem cells (ESCs) cardiac differentiation and mitochondrial biogenesis in vitro. METHODS: Cardiac differentiation of the mouse ESCs was initiated by embryoid bodies (EBs) formation in hanging drops. EBs were exposed to 0.5ng/ml T-2 toxin for 24, 72 and 120h. Cultures were observed daily for the appearance of contracting clusters, and cardiac-specific protein (α-actiniin) were measured by Western blot and immunocytochemistry...
September 6, 2016: Toxicology Letters
https://www.readbyqxmd.com/read/27331877/standardized-boesenbergia-pandurata-extract-stimulates-exercise-endurance-through-increasing-mitochondrial-biogenesis
#17
Taeyoon Kim, Mi-Bo Kim, Changhee Kim, Hoe-Yune Jung, Jae-Kwan Hwang
In the present study, the effect of standardized Boesenbergia pandurata (Roxb.) Schltr. (fingerroot) ethanol extract on exercise endurance was investigated in L6 rat skeletal muscle cells and C57BL/6J mice. Standardized B. pandurata ethanol extract (BPE) increased mitochondrial mass and stimulated the mRNA expression of peroxisome proliferator-activated receptor gamma coactivator 1 alpha (PGC-1α) in vitro. BPE also elevated the mRNA expression of key factors of mitochondrial biogenesis and function, which are activated by PGC-1α, such as estrogen-related receptor α (ERRα), nuclear respiratory factor 1 (NRF-1), and mitochondrial transcription factor A (Tfam)...
July 2016: Journal of Medicinal Food
https://www.readbyqxmd.com/read/27324142/circadian-genes-and-lithium-response-in-bipolar-disorders-associations-with-ppargc1a-pgc-1%C3%AE-and-rora
#18
P A Geoffroy, B Etain, M Lajnef, E-H Zerdazi, C Brichant-Petitjean, U Heilbronner, L Hou, F Degenhardt, M Rietschel, F J McMahon, T G Schulze, S Jamain, C Marie-Claire, F Bellivier
Preliminary studies suggest that lithium (Li) response might be associated with some circadian gene polymorphisms, we therefore performed a pharmacogenetic study on the core clock genes in two independent samples suffering from bipolar disorder (BD) and thoroughly characterized for their Li response. Two independent Caucasian samples (165 and 58 bipolar patients) treated with Li were selected from samples recruited in a French multicenter study and assessed for their Li response using the Alda scale. The two samples were genotyped using the Human660 (H660) and OmniExpress (OE) BeadChips and gene-based association analyses of 22 core clock genes were conducted...
September 2016: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/27317894/puerarin-isolated-from-pueraria-lobata-willd-protects-against-diabetic-nephropathy-by-attenuating-oxidative-stress
#19
Xiaohui Xu, Ni Zheng, Zhaoni Chen, Wansu Huang, Tao Liang, Hai Kuang
In this study, we evaluated the effect of puerarin (PR) on diabetic nephropathy (DN) in streptozotocin (STZ)-induced diabetic mice. The fasting blood glucose (FBG), blood urea nitrogen (BUN) and serum creatinine (Scr), as well as 24-hour urine protein levels were effectively ameliorated in DN mice treated with PR (20, 40, 80mg/kg/day). Furthermore, PR treatment markedly resulted in down-regulation of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α) and reactive oxygen species (ROS) in kidney. Interestingly, the activities of manganese superoxide dismutase (MnSOD) and catalase (CAT) were increased by PR...
October 15, 2016: Gene
https://www.readbyqxmd.com/read/27302464/thyroid-hormone-activation-by-type%C3%A2-2-deiodinase-mediates-exercise-induced-peroxisome-proliferator-activated-receptor-%C3%AE-coactivator-1%C3%AE-expression-in-skeletal-muscle
#20
Barbara M L C Bocco, Ruy A N Louzada, Diego H S Silvestre, Maria C S Santos, Elena Anne-Palmer, Igor F Rangel, Sherine Abdalla, Andrea C Ferreira, Miriam O Ribeiro, Balázs Gereben, Denise P Carvalho, Antonio C Bianco, João P Werneck-de-Castro
KEY POINTS: In skeletal muscle, physical exercise and thyroid hormone mediate the peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1a) expression that is crucial to skeletal muscle mitochondrial function. The expression of type 2 deiodinase (D2), which activates thyroid hormone in skeletal muscle is upregulated by acute treadmill exercise through a β-adrenergic receptor-dependent mechanism. Pharmacological block of D2 or disruption of the Dio2 gene in skeletal muscle fibres impaired acute exercise-induced PGC-1a expression...
September 15, 2016: Journal of Physiology
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