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inducing mitochondrial biogenesis

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https://www.readbyqxmd.com/read/28338610/fructose-rich-diet-affects-mitochondrial-dna-damage-and-repair-in-rats
#1
Federica Cioffi, Rosalba Senese, Pasquale Lasala, Angela Ziello, Arianna Mazzoli, Raffaella Crescenzo, Giovanna Liverini, Antonia Lanni, Fernando Goglia, Susanna Iossa
Evidence indicates that many forms of fructose-induced metabolic disturbance are associated with oxidative stress and mitochondrial dysfunction. Mitochondria are prominent targets of oxidative damage; however, it is not clear whether mitochondrial DNA (mtDNA) damage and/or its lack of repair are events involved in metabolic disease resulting from a fructose-rich diet. In the present study, we evaluated the degree of oxidative damage to liver mtDNA and its repair, in addition to the state of oxidative stress and antioxidant defense in the liver of rats fed a high-fructose diet...
March 24, 2017: Nutrients
https://www.readbyqxmd.com/read/28334504/redd1-deficiency-impairs-autophagy-and-mitochondrial-biogenesis-in-articular-cartilage-and-increases-the-severity-of-experimental-osteoarthritis
#2
Oscar Alvarez-Garcia, Tokio Matsuzaki, Merissa Olmer, Lars Plate, Jeffery W Kelly, Martin K Lotz
Objective REDD1 is an endogenous inhibitor of mTOR that regulates cellular stress responses. REDD1 expression is decreased in aged and osteoarthritis (OA) cartilage and it regulates mTOR signaling and autophagy in articular chondrocytes in vitro. The present study investigated the effects of REDD1 deletion in vivo using a mouse model of experimental OA. Methods Severity of OA was histologically assessed in 4-month-old wild-type and in Redd1(-/-) mice subjected to surgical destabilization of the medial meniscus (DMM)...
March 23, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28333151/fto-is-required-for-myogenesis-by-positively-regulating-mtor-pgc-1%C3%AE-pathway-mediated-mitochondria-biogenesis
#3
Xiaobo Wang, Ning Huang, Min Yang, Dandan Wei, Haoran Tai, Xiaojuan Han, Hui Gong, Jiao Zhou, Jianqiong Qin, Xiawei Wei, Honghan Chen, Tingting Fang, Hengyi Xiao
Global germ line loss of fat mass- and obesity-associated (FTO) gene results in both the reduction of fat mass and lean mass in mice. The role of FTO in adipogenesis has been proposed, however, that in myogenesis has not. Skeletal muscle is the main component of body lean mass, so its connection with FTO physiologic significance need to be clarified. Here, we assessed the impact of FTO on murine skeletal muscle differentiation by in vitro and in vivo experiments. We found that FTO expression increased during myoblasts differentiation, while the silence of FTO inhibited the differentiation; in addition, skeletal muscle development was impaired in skeletal muscle FTO-deficient mice...
March 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28332118/nutrition-and-training-influences-on-the-regulation-of-mitochondrial-adenosine-diphosphate-sensitivity-and-bioenergetics
#4
REVIEW
Graham P Holloway
Since the seminal finding almost 50 years ago that exercise training increases mitochondrial content in skeletal muscle, a considerable amount of research has been dedicated to elucidate the mechanisms inducing mitochondrial biogenesis. The discovery of peroxisome proliferator-activated receptor γ co-activator 1α as a major regulator of exercise-induced gene transcription was instrumental in beginning to understand the signals regulating this process. However, almost two decades after its discovery, our understanding of the signals inducing mitochondrial biogenesis remain poorly defined, limiting our insights into possible novel training modalities in elite athletes that can increase the oxidative potential of muscle...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28329063/lysosomal-proteolysis-is-associated-with-exercise-induced-improvement-of-mitochondrial-quality-control-in-aged-hippocampus
#5
Li Luo, Jia-Ru Dai, Shan-Shan Guo, A-Ming Lu, Xiao-Fang Gao, Yan-Rong Gu, Xiao-Fei Zhang, Hai-Dong Xu, Yan Wang, Zhou Zhu, Lisa J Wood, Zheng-Hong Qin
Exercise improves cognitive function in older adults, but the underlying mechanism is largely unknown. Both lysosomal degradation and mitochondrial quality control decline with age. We hypothesized that exercise ameliorates age-related cognitive decline through the improvement of mitochondrial quality control in aged hippocampus, and this effect is associated with lysosomal proteolysis. Sixteen to eighteen-month old male Sprague Dawley rats underwent swim exercise training for 10 weeks. The exercise regimen prevented cognitive decline in aged rats, reduced oxidative stress, and rejuvenated mitochondria in the aged hippocampus...
January 19, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28319092/the-tdh-gcn5l1-fbxo15-kbp-axis-limits-mitochondrial-biogenesis-in-mouse-embryonic-stem%C3%A2-cells
#6
Valerio Donato, Massimo Bonora, Daniele Simoneschi, Davide Sartini, Yasusei Kudo, Anita Saraf, Laurence Florens, Michael P Washburn, Matthias Stadtfeld, Paolo Pinton, Michele Pagano
Self-renewing naive mouse embryonic stem cells (mESCs) contain few mitochondria, which increase in number and volume at the onset of differentiation. KBP (encoded by Kif1bp) is an interactor of the mitochondrial-associated kinesin Kif1Bα. We found that TDH, responsible for mitochondrial production of acetyl-CoA in mESCs, and the acetyltransferase GCN5L1 cooperate to acetylate Lys501 in KBP, allowing its recognition by and degradation via Fbxo15, an F-box protein transcriptionally controlled by the pluripotency core factors and repressed following differentiation...
March 20, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28317895/upregulation-of-skeletal-muscle-pgc-1%C3%AE-through-the-elevation-of-cyclic-amp-levels-by-cyanidin-3-glucoside-enhances-exercise-performance
#7
Toshiya Matsukawa, Hideko Motojima, Yuki Sato, Shinya Takahashi, Myra O Villareal, Hiroko Isoda
Regular exercise and physical training enhance physiological capacity and improve metabolic diseases. Skeletal muscles require peroxisome proliferator-activated receptor-gamma coactivator-1α (PGC-1α) in the process of their adaptation to exercise owing to PGC-1α's ability to regulate mitochondrial biogenesis, angiogenesis, and oxidative metabolism. Cyanidin-3-glucoside (Cy3G) is a natural polyphenol and a nutraceutical factor, which has several beneficial effects on human health. Here, the effect of Cy3G on exercise performance and the underlying mechanisms involved were investigated...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28317281/comparison-of-dietary-polyphenols-for-protection-against-molecular-mechanisms-underlying-non-alcoholic-fatty-liver-disease-in-a-cell-model-of-steatosis
#8
Hossein Rafiei, Kosar Omidian, Brian Bandy
SCOPE: Dietary polyphenols have shown promise in protecting the liver against non-alcoholic fatty liver disease. The relative effectiveness and mechanisms of different polyphenols however is mostly unknown. METHODS AND RESULTS: In a model of steatosis using HepG2 hepatocytes, we evaluated the protective effects of different classes of polyphenols and the contributing mechanisms. Treatment of the cells with oleic acid increased ROS generation and expression of TNFα, decreased expression of UCP2 and decreased mitochondrial content and markers of biogenesis...
March 20, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28289506/regulation-of-mitochondrial-function-and-endoplasmic-reticulum-stress-by-nitric-oxide-in-pluripotent-stem-cells
#9
REVIEW
Estefania Caballano-Infantes, José Terron-Bautista, Amparo Beltrán-Povea, Gladys M Cahuana, Bernat Soria, Hajji Nabil, Francisco J Bedoya, Juan R Tejedo
Mitochondrial dysfunction and endoplasmic reticulum stress (ERS) are global processes that are interrelated and regulated by several stress factors. Nitric oxide (NO) is a multifunctional biomolecule with many varieties of physiological and pathological functions, such as the regulation of cytochrome c inhibition and activation of the immune response, ERS and DNA damage; these actions are dose-dependent. It has been reported that in embryonic stem cells, NO has a dual role, controlling differentiation, survival and pluripotency, but the molecular mechanisms by which it modulates these functions are not yet known...
February 26, 2017: World Journal of Stem Cells
https://www.readbyqxmd.com/read/28286268/resveratrol-rescues-cadmium-induced-mitochondrial-injury-by-enhancing-transcriptional-regulation-of-pgc-1%C3%AE-and-sod2-via-the-sirt3-foxo3a-pathway-in-tcmk-1-cells
#10
Beibei Fu, Jiamin Zhao, Wei Peng, Haibo Wu, Yong Zhang
Resveratrol has been reported to ameliorate Cd-induced nephrotoxicity. However, the beneficial effects of resveratrol on Cd-induced nephrotoxicity and the underlying mechanisms of this protection remain unclear. Here, we showed that mouse renal tubular epithelial (TCMK-1) cells exposed to Cd experienced significantly increased mitochondrial reactive oxygen species (mROS) production, as well as decreased mitochondrial biogenesis and function. Cd exposure dramatically decreased Sirt3 protein expression and activity and promoted the acetylation of forkhead box O3 (FoxO3a)...
March 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28285161/nanoparticle-mediated-ppar%C3%AE-gene-delivery-on-dental-implants-improves-osseointegration-via-mitochondrial-biogenesis-in-diabetes-mellitus-rat-model
#11
Young-Hee Lee, Jeong-Seok Kim, Ji-Eun Kim, Min-Ho Lee, Jae-Gyu Jeon, Il-Song Park, Ho-Keun Yi
Diabetes mellitus (DM) has a detrimental effect on osseointegration, stability and longevity of implants due to osteoporosis. In this study, PPARγ-loaded dental implants were investigated for the improvement of osseointegration and peri-implantitis. Chitosan gold nanoparticles conjugated with PPARγ cDNA were introduced on titanium mini-implant surfaces for PPARγ release to rat mandibular. DM-induced rat mandible showed structural changes such as decreased bone mass and increased inflammatory molecules, and diminution of PPARγ expression and bone formation molecules compared to normal rats...
March 8, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28283884/resveratrol-and-brain-mitochondria-a-review
#12
REVIEW
Fernanda Rafaela Jardim, Fernando Tonon de Rossi, Marielle Xavier Nascimento, Renata Gabriele da Silva Barros, Paula Agrizzi Borges, Isabella Cristina Prescilio, Marcos Roberto de Oliveira
Resveratrol (3,4',5-trihydroxystilbene; C14H12O3) is a polyphenolic phytoalexin found in grapes, berries, peanuts, and wines. Resveratrol has been viewed as an antioxidant, anti-inflammatory, anti-apoptotic, and anticancer agent. Moreover, it has been reported that resveratrol modulates mitochondrial function, redox biology, and dynamics in both in vitro and in vivo experimental models. Resveratrol also attenuates mitochondrial impairment induced by certain stressors. Resveratrol upregulates, for example, mitochondria-located antioxidant enzymes, decreasing the production of reactive species by these organelles...
March 10, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28283480/leveraging-increased-cytoplasmic-nucleoside-kinase-activity-to-target-mtdna-and-oxidative-phosphorylation-in-aml
#13
Sanduni U Liyanage, Rose Hurren, Veronique Voisin, Gaëlle Bridon, Xiaoming Wang, ChangJiang Xu, Neil MacLean, Thirushi P Siriwardena, Marcela Gronda, Dana Yehudai, Shrivani Sriskanthadevan, Daina Avizonis, Aisha Shamas-Din, Mark D Minden, Gary D Bader, Rebecca Laposa, Aaron D Schimmer
Mitochondrial DNA (mtDNA) biosynthesis requires replication factors and adequate nucleotide pools from the mitochondria and cytoplasm. We performed gene expression profiling analysis of 542 human AML samples and identified 55% with upregulated mtDNA biosynthesis pathway expression compared to normal hematopoietic cells. Genes that support mitochondrial nucleotide pools, including mitochondrial nucleotide transporters and a subset of cytoplasmic nucleoside kinases, were also increased in AML compared to normal hematopoietic samples...
March 10, 2017: Blood
https://www.readbyqxmd.com/read/28283035/inhibition-of-autophagy-enhances-the-selective-anti-cancer-activity-of-tigecycline-to-overcome-drug-resistance-in-the-treatment-of-chronic-myeloid-leukemia
#14
Ziyuan Lu, Na Xu, Bolin He, Chengyun Pan, Yangqing Lan, Hongsheng Zhou, Xiaoli Liu
BACKGROUND: Drug resistance and disease progression are still the major obstacles in the treatment of chronic myeloid leukemia (CML). Increasing researches have demonstrated that autophagy becomes activated when cancer cells are subjected to chemotherapy, which is involved in the development of drug resistance. Therefore, combining chemotherapy with inhibition of autophagy serves as a new strategy in cancer treatment. Tigecycline is an antibiotic that has received attention as an anti-cancer agent due to its inhibitory effect on mitochondrial translation...
March 10, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28282095/dietary-fat-proportionately-enhances-oxidative-stress-and-glucose-intolerance-followed-by-impaired-expression-of-the-genes-associated-with-mitochondrial-biogenesis
#15
Nabanita Das, Ashok Mandala, Sudarshan Bhattacharjee, Debasri Mukherjee, Debasish Bandyopadhyay, Sib Sankar Roy
Consumption of food that surpasses the metabolic necessity of the body leads to an epidemic condition termed obesity, which causes several metabolic disorders including oxidative damage. Dietary intervention can enlighten the mechanisms and therapeutics associated with these metabolic disorders. The reported studies related to diet include fat of different kinds and from different sources, however they lack dose response aspects. Our study highlighted the importance of dietary fat modification in modulating oxidative stress-induced glucose intolerance...
March 10, 2017: Food & Function
https://www.readbyqxmd.com/read/28281651/sprint-interval-but-not-continuous-exercise-increases-pgc-1%C3%AE-protein-content-and-p53-phosphorylation-in-nuclear-fractions-of-human-skeletal-muscle
#16
Cesare Granata, Rodrigo S F Oliveira, Jonathan P Little, Kathrin Renner, David J Bishop
Sprint interval training has been reported to induce similar or greater mitochondrial adaptations to continuous training. However, there is limited knowledge about the effects of different exercise types on the early molecular events regulating mitochondrial biogenesis. Therefore, we compared the effects of continuous and sprint interval exercise on key regulatory proteins linked to mitochondrial biogenesis in subcellular fractions of human skeletal muscle. Nineteen men, performed either 24 min of moderate-intensity continuous cycling at 63% of WPeak (CE), or 4 × 30-s "all-out" cycling sprints (SIE)...
March 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28277184/quercetin-attenuates-domoic-acid-induced-cognitive-deficits-in-mice
#17
Dongmei Wang, Jianlong Zhao, Sanqiang Li, Guomin Shen, Shu Hu
Domoic acid (DA) is one of the best known marine toxins, causative of important neurotoxic alterations. DA effects are documented both in wildlife and experimental assays, showing that this toxin causes severe injuries principally in the hippocampal area. Accumulating evidence indicates that mitochondrial dysfunction and oxidative stress are involved in DA-induced cognitive functional impairment. Therefore, therapeutics targeted to improve mitochondrial function and increase oxidative stress defence could be beneficial...
September 26, 2016: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28274921/the-unfolded-protein-response-in-relation-to-mitochondrial-biogenesis-in-skeletal-muscle-cells
#18
Zahra S Mesbah Moosavi, David A Hood
Mitochondria are comprised of both nuclear- and mitochondrially-encoded proteins requiring precise stoichiometry for their integration into functional complexes. The augmented protein synthesis associated with mitochondrial biogenesis results in the accumulation of unfolded proteins, thus triggering cellular stress. As such, the unfolded protein responses emanating from the endoplasmic reticulum (UPR(ER)) or the mitochondrion (UPR(MT)) are triggered to ensure correct protein handling. Whether this response is necessary for mitochondrial adaptations is unknown...
March 8, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28270591/decreased-transcriptional-corepressor-p107-is-associated-with-exercise-induced-mitochondrial-biogenesis-in-human-skeletal-muscle
#19
Debasmita Bhattacharya, Mia Ydfors, Meghan C Hughes, Jessica Norrbom, Christopher G R Perry, Anthony Scimè
Increased mitochondrial content is a hallmark of exercise-induced skeletal muscle remodeling. For this process, considerable evidence underscores the involvement of transcriptional coactivators in mediating mitochondrial biogenesis. However, our knowledge regarding the role of transcriptional corepressors is lacking. In this study, we assessed the association of the transcriptional corepressor Rb family proteins, Rb and p107, with endurance exercise-induced mitochondrial adaptation in human skeletal muscle...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28266085/branched-chain-amino-acid-ratios-in-low-protein-diets-regulate-the-free-amino-acid-profile-and-the-expression-of-hepatic-fatty-acid-metabolism-related-genes-in-growing-pigs
#20
Y H Duan, F N Li, C Y Wen, W L Wang, Q P Guo, Y H Li, Y L Yin
Liver metabolism is affected by nutrients. The aim of this study was to explore the effects of low-protein diets (17% crude protein, CP) supplemented with branched-chain amino acids (BCAAs), including leucine (Leu), isoleucine (Ile) and valine (Val), on hepatic amino acid profile and lipid metabolism in growing pigs. The ratio of Leu : Ile : Val in all groups was 1 : 0.51 : 0.63 (20% crude protein, CP), 1 : 1 : 1 (17% CP), 1 : 0.75 : 0.75 (17% CP), 1 : 0.51 : 0.63 (17% CP) and 1 : 0.25 : 0...
March 6, 2017: Journal of Animal Physiology and Animal Nutrition
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