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Xiaocui Jiao, Ying Li, Tao Zhang, Maodong Liu, Yanqing Chi
The apoptosis of renal tubular epithelial cells contributes to the pathogenesis of diabetic nephropathy. High glucose-induced mitochondrial oxidative stress is considered to be an important mediator for renal tubular cell apoptosis. Sirtuin3(Sirt3), a kind of mitochondria-localized nicotinamide adenine dinucleotide(NAD(+))-dependent protein deacetylase, has been reported to regulate the generation of ROS in mitochondria through regulating acetylation level and activity of several key mitochondrial enzymes. In this study, we investigated the role of Sirt3 on high glucose-induced apoptosis in HK-2 cells...
October 20, 2016: Biochemical and Biophysical Research Communications
Andy W C Man, Bo Bai, Yu Wang
Mitochondria play a pivotal role in maintaining cellular homeostasis and regulating longevity. SIRT3 is a mitochondrial sirtuin mediating the deacetylation of various metabolic and antioxidant enzymes, in turn controlling energy metabolism, stress resistance, and the pace of ageing. To study the function of SIRT3, a proteomics-based approach is employed for identifying the protein-binding partners of this enzyme in mitochondria.
2016: Methods in Molecular Biology
Ji-Hua Ren, Xiang Chen, Li Zhou, Na-Na Tao, Hong-Zhong Zhou, Bo Liu, Wan-Yu Li, Ai-Long Huang, Juan Chen
BACKGROUND/AIM: The hepatitis B virus (HBV) infection is accompanied by the induction of oxidative stress, especially mediated by HBV X protein (HBx). Oxidative stress has been implicated in a series of pathological states, such as DNA damage, cell survival and apoptosis. However, the host factor by which cells protect themselves under this oxidative stress is poorly understood. METHODOLOGY/PRINCIPAL FINDINGS: In this study, we first confirmed that HBV infection significantly induced oxidative stress...
2016: PloS One
Inês O Gonçalves, Emanuel Passos, Cátia V Diogo, Sílvia Rocha-Rodrigues, Estela Santos-Alves, Paulo J Oliveira, António Ascensão, José Magalhães
Mitochondrial quality control and apoptosis have been described as key components in the pathogenesis of nonalcoholic steatohepatitis (NASH); exercise is recognized as a nonpharmacological strategy to counteract NASH-associated consequences. We aimed to analyze the effect of voluntary physical activity (VPA) and endurance training (ET) against NASH-induced mitochondrial permeability transition pore (mPTP) opening and mitochondrial and cellular quality control deleterious alterations. Forty-eight male Sprague-Dawley rats were divided into standard-diet sedentary (SS, n = 16), standard-diet VPA (n = 8), high-fat diet sedentary (HS, n = 16), and high-fat diet VPA (n = 8)...
March 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Wenxin Tong, Liping Ju, Miaoyan Qiu, Qihai Xie, Ying Chen, Weili Shen, Weihong Sun, Weiqing Wang, Jingyan Tian
AIM: Overwhelming oxidative stress is implicated as crucial in the pathogenesis of non-alcoholic fatty liver disease (NAFLD). Liraglutide, a well-established antidiabetes drug, was recently reported to ameliorate NAFLD with an elusive mechanism. We used a mouse model to examine whether liraglutide could ameliorate NAFLD and explored the possible mechanisms. METHODS: Twenty C57BL/6J mice were randomly treated with a normal-fat diet or high-fat diet for 16 weeks, then further distributed into four groups and subjected to s...
August 2016: Hepatology Research: the Official Journal of the Japan Society of Hepatology
Liping Xie, Haihua Feng, Sha Li, Guoliang Meng, Shangmin Liu, Xin Tang, Yan Ma, Yi Han, Yujiao Xiao, Yue Gu, Yongfeng Shao, Chung-Min Park, Ming Xian, Yu Huang, Albert Ferro, Rui Wang, Philip K Moore, Hong Wang, Yong Ji
AIM: Oxidative stress is a key contributor to endothelial dysfunction and associated cardiovascular pathogenesis. Hydrogen sulfide (H2S) is an antioxidant gasotransmitter that protects endothelial cells against oxidative stress. Sirtuin3 (SIRT3), which belongs to the silent information regulator 2 (SIR2) family, is an important deacetylase under oxidative stress. H2S is able to regulate the activity of several sirtuins. The present study aims to investigate the role of SIRT3 in the antioxidant effect of H2S in endothelial cells...
February 20, 2016: Antioxidants & Redox Signaling
Daniela Macconi, Luca Perico, Lorena Longaretti, Marina Morigi, Paola Cassis, Simona Buelli, Norberto Perico, Giuseppe Remuzzi, Ariela Benigni
BACKGROUND: Angiotensin II promotes insulin resistance. The mechanism underlying this abnormality, however, is still poorly defined. In a different setting, skeletal muscle metabolism and insulin signaling are regulated by Sirtuin3. OBJECTIVE: Here, we investigate whether angiotensin II-induced insulin resistance in skeletal muscle is associated with Sirtuin3 dysregulation and whether pharmacological manipulation of Sirtuin3 confers protection. STUDY DESIGN: Parental and GLUT4-myc L6 rat skeletal muscle cells exposed to angiotensin II are used as in vitro models of insulin resistance...
2015: PloS One
Ye Li, Wenjing Wang, Xiaoxue Xu, Shiyue Sun, Xiaoyu Xu, Xian-jun Qu
{2-[1-(3-Methoxycarbonylmethyl-1H-indol-2-yl)-1-methyl-ethyl]-1H-indol-3-yl}-acetic acid methyl ester (MIAM) is a novel indole compound, which possessed high efficacy against many cancers xenografted in mice without obvious toxicity. In this study, we aimed to investigate the effects of MIAM on human hepatocellular carcinoma (HCC) Bel-7402 cells and its resistant variants Bel-7402/5FU. MIAM inhibited the growth of HCC more potent in Bel-7402/5FU cells than its parent cells. MIAM increased cellular reactive oxygen species (ROS) levels, induced cell apoptosis, and arrested cell cycle in G0/G1 phase...
2015: BioMed Research International
Kai Zhao, Yuxin Zhou, Chen Qiao, Ting Ni, Zhiyu Li, Xiaotang Wang, Qinglong Guo, Na Lu, Libin Wei
INTRODUCTION: p53 plays important roles in regulating the metabolic reprogramming of cancer, such as aerobic glycolysis. Oroxylin A is a natural active flavonoid with strong anticancer effects both in vitro and in vivo. METHODS: wt-p53 (MCF-7 and HCT116 cells) cancer cells and p53-null H1299 cancer cells were used. The glucose uptake and lactate production were analyzed using Lactic Acid production Detection kit and the Amplex Red Glucose Assay Kit. Then, the protein levels and RNA levels of p53, mouse double minute 2 (MDM2), and p53-targeted glycolytic enzymes were quantified using Western blotting and quantitative polymerase chain reaction (PCR), respectively...
2015: Journal of Hematology & Oncology
Mohsen Sharifi Klishadi, Farideh Zarei, Seyyed Hassan Hejazian, Ali Moradi, Mahdieh Hemati, Fatemeh Safari
PURPOSE: Sirtuin-3 (SIRT3) deacetylase protects the heart against oxidative stress via survival factors upregulation. Clinical and experimental studies have demonstrated that activation of systemic and local renin-angiotensin system (RAS) is implicated in ischemia-induced cardiac injury. However, the relation between RAS and SIRT3 in pathophysiology of myocardial ischemia reperfusion is unknown. In this study, the cardiac transcription and expression of SIRT3 levels was examined in response to ischemia reperfusion in untreated and losartan treated rats...
2015: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
Lei Liu, Carina Peritore, Jessica Ginsberg, Merve Kayhan, Gizem Donmez
Parkinson's disease (PD) is one of the most common neurodegenerative diseases, which is characterized by progressive degeneration of nigrostriatal dopaminergic neurons. There is a growing consensus that mitochondrial dysfunction and oxidative stress play a crucial role in PD pathogenesis. Sirtuin3 (SIRT3) is the major mitochondria NAD(+)-dependent deacetylase that acts as a regulator of mitochondrial protein function; it is essential for maintaining mitochondrial integrity. Although SIRT3 was reported to have anti-oxidative stress activity in an in vitro study, there is no explicit in vivo evidence for the involvement of SIRT3 in the etiology of PD...
March 2015: Neurochemical Research
Xue-Qing Wang, Yong Shao, Chong-Yi Ma, Wei Chen, Lu Sun, Wei Liu, Dong-Yang Zhang, Bi-Cheng Fu, Kai-Yu Liu, Zhi-Bo Jia, Bao-Dong Xie, Shu-Lin Jiang, Ren-Ke Li, Hai Tian
Sirtuin3 (SIRT3) is an important member of the sirtuin family of protein deacetylases that is localized to mitochondria and linked to lifespan extension in organisms ranging from yeast to humans. As aged cells have less regenerative capacity and are more susceptible to oxidative stress, we investigated the effect of ageing on SIRT3 levels and its correlation with antioxidant enzyme activities. Here, we show that severe oxidative stress reduces SIRT3 levels in young human mesenchymal stromal/stem cells (hMSCs)...
November 2014: Journal of Cellular and Molecular Medicine
Jing Wang, Honglin Feng, Jun Zhang, Hongquan Jiang
OBJECTIVE: Lithium and valproic acid (VPA) have been reported to produce antioxidant effects by increasing the transcriptional coactivator peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) expression, which may contribute to their neuroprotective properties. As a coactivator for many transcriptional factors including PGC-1α, coactivator-associated arginine methyltransferase1(CARM1) regulates oxidative metabolism and mitochondrial biogenesis. Besides, Sirtuin3 (SIRT3), a new target of PGC-1α, plays an important role in preserving mitochondrial function...
2013: Neuro Endocrinology Letters
Lanfang Li, Heng Zeng, Xuwei Hou, Xiaochen He, Jian-Xiong Chen
Our previous study shows that treatment with apelin increases bone marrow cells (BMCs) recruitment and promotes cardiac repair after myocardial infarction (MI). The objective of this study was to investigate whether overexpression of apelin in BMCs improved cell therapy and accelerated cardiac repair and functional recovery in post-MI mice. Mouse myocardial infarction was achieved by coronary artery ligation and BMCs overexpressing apelin (apelin-BMCs) or GFP (GFP-BMCs) were injected into ischemic area immediately after surgery...
2013: PloS One
Mitchell C Coleman, Alicia K Olivier, James A Jacobus, Kranti A Mapuskar, Gaowei Mao, Sean M Martin, Dennis P Riley, David Gius, Douglas R Spitz
AIMS: This study determined whether acute radiation-induced liver injury seen in Sirtuin3(-/-) mice after exposure to Cs-137 γ-rays was mediated by superoxide anion (O2(•-)). RESULTS: Male wild-type (WT) and SIRT3(-/-) mice were given 2×2 Gy whole-body radiation doses separated by 24 h and livers were harvested 20 h after the second dose. Ex vivo measurements in fresh frozen liver sections demonstrated 50% increases in dihydroethidium oxidation from SIRT3(-/-) animals, relative to WT animals, before irradiation, but this increase was not detected 20 h after radiation exposure...
March 20, 2014: Antioxidants & Redox Signaling
M Mar Blanquer-Rosselló, Jordi Oliver, Adamo Valle, Pilar Roca
Xanthohumol (XN) and 8-prenylnaringenin (8PN) are hop (Humulus lupulus L.) polyphenols studied for their chemopreventive effects on certain cancer types. The breast cancer line MCF-7 was treated with doses ranging from 0.001 to 20 µM of XN or 8PN in order to assess the effects on cell viability and oxidative stress. Hoechst 33342 was used to measure cell viability and reactive oxygen species (ROS) production was determined by 2',7'-dichlorofluorescein diacetate. Catalase, superoxide dismutase, and glutathione reductase enzymatic activities were determined and protein expression of sirtuin1, sirtuin3, and oxidative phosphorylation system (OXPHOS) were done by Western blot...
December 2013: Journal of Cellular Biochemistry
Deeba N Syed, Hasan Mukhtar
Exposure to environmentally relevant doses of ozone induces oxidative stress and is associated with adverse effects at tissue level. Delineating the role of sirtuin3, involved in cellular energy homoeostasis, in the response of skin to ozone can be a step towards developing prevention strategies against cutaneous pathologies.
June 2013: Experimental Dermatology
Xinning Wu, Peili Bu, Junni Liu, Lixing Zhao, Xi Wang, Na Li
OBJECTIVE: To detect the expression of Sirtuin3 (Sirt3) in mice vascular smooth muscle cells (VSMCs) and explore the effect of Sirt3 on VSMCs proliferation induced by angiotensin II (AngII). METHODS: The mRNA and protein expressions of Sirt3 in wild C57 mice VSMCs were assessed by RT-PCR and Western blotting, respectively. After the cells were exposed to various concentrations of AngII (10(-7);, 10(-6);, 10(-5); mol/L), the mRNA and protein expressions of Sirt3 were assessed again in the same way...
March 2013: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
Y Ghinis-Hozumi, A González-Gallardo, L González-Dávalos, A Antaramian, F Villarroya, A Shimada, A Varela-Echavarría, O Mora
Sirtuins, the mammalian homologs of the silent information regulator 2 gene of Saccharomyces cerevisiae, are members of the NAD(+)-dependent family of histone deacetylases. In vertebrates, 7 sirtuins have been described, with different cellular localizations and target proteins. Glucose and lipid metabolism are among the processes regulated by these enzymes. In ruminants, gluconeogenesis is the main biochemical pathway by which glucose is obtained. Because sirtuins in bovines have not been studied, the aim of this work was to obtain sequences coding for the 7 sirtuins and determine the expression patterns of sirtuin1 (Sirt1) and sirtuin3 (Sirt3) in the liver, muscle, and adipose tissue of calves and bulls...
August 2011: Journal of Animal Science
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