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Nguyen K, Tang J, Cho S, Ying F, Sung HK, Jahng JW, Pantopoulos K, Sweeney G. Salubrinal promotes phospho-eIF2α-dependent activation of UPR leading to autophagy-mediated attenuation of iron-induced insulin resistance. Mol Metab 2024; 83:101921. [PMID: 38527647 PMCID: PMC11027572 DOI: 10.1016/j.molmet.2024.101921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 03/04/2024] [Accepted: 03/15/2024] [Indexed: 03/27/2024] Open
Abstract
Identification of new mechanisms mediating insulin sensitivity is important to allow validation of corresponding therapeutic targets. In this study, we first used a cellular model of skeletal muscle cell iron overload and found that endoplasmic reticulum (ER) stress and insulin resistance occurred after iron treatment. Insulin sensitivity was assessed using cells engineered to express an Akt biosensor, based on nuclear FoxO localization, as well as western blotting for insulin signaling proteins. Use of salubrinal to elevate eIF2α phosphorylation and promote the unfolded protein response (UPR) attenuated iron-induced insulin resistance. Salubrinal induced autophagy flux and its beneficial effects on insulin sensitivity were not observed in autophagy-deficient cells generated by overexpressing a dominant-negative ATG5 mutant or via knockout of ATG7. This indicated the beneficial effect of salubrinal-induced UPR activation was autophagy-dependent. We translated these observations to an animal model of systemic iron overload-induced skeletal muscle insulin resistance where administration of salubrinal as pretreatment promoted eIF2α phosphorylation, enhanced autophagic flux in skeletal muscle and improved insulin responsiveness. Together, our results show that salubrinal elicited an eIF2α-autophagy axis leading to improved skeletal muscle insulin sensitivity both in vitro and in mice.
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Affiliation(s)
- Khang Nguyen
- Department of Biology, York University, Toronto, ON, Canada
| | - Jialing Tang
- Department of Biology, York University, Toronto, ON, Canada
| | - Sungji Cho
- Department of Biology, York University, Toronto, ON, Canada
| | - Fan Ying
- Department of Biology, York University, Toronto, ON, Canada
| | | | | | - Kostas Pantopoulos
- Lady Davis Institute for Medical Research, Jewish General Hospital and Department of Medicine, McGill University, Montreal, Canada
| | - Gary Sweeney
- Department of Biology, York University, Toronto, ON, Canada.
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2
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Li Y, Ji Y, Li F. A review: Mechanism and prospect of gastrodin in prevention and treatment of T2DM and COVID-19. Heliyon 2023; 9:e21218. [PMID: 37954278 PMCID: PMC10637887 DOI: 10.1016/j.heliyon.2023.e21218] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 09/15/2023] [Accepted: 10/18/2023] [Indexed: 11/14/2023] Open
Abstract
Gastrodin is an extract from the dried tuber of the Chinese herb Gastrodia elata (Tian ma), with anti-inflammatory, antioxidant, and antiviral properties. Recent studies have shown that, compared to commonly used diabetes drugs, gastrodin has antidiabetic effects in multiple ways, with characteristics of low cost, high safety, less side effects, protection of β-cell function, relieving insulin resistance and alleviating multiple complications. In addition, it is confirmed that gastrodin can protect the function of lung and other organs, enhance antiviral activity via upregulating the type I interferon (IFN-I), and inhibit angiotensin II (AngII), a key factor in "cytokine storm" caused by COVID-19. Therefore, we reviewed the effect and mechanism of gastrodin on type 2 diabetes mellitus (T2DM), and speculated other potential mechanisms of gastrodin in alleviating insulin resistance from insulin signal pathway, inflammation, mitochondrial and endoplasmic reticulum and its potential in the prevention and treatment of COVID-19. We hope to provide new direction and treatment strategy for basic research and clinical work: gastrodin is considered as a drug for the prevention and treatment of diabetes and COVID-19.
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Affiliation(s)
- Yi Li
- Shanxi Provincial People's Hospital, Shanxi Medical University, Taiyuan, China
| | - Yuanyuan Ji
- Shanxi Provincial People's Hospital, Shanxi Medical University, Taiyuan, China
| | - Fenglan Li
- Shanxi Provincial People's Hospital, Shanxi Medical University, Taiyuan, China
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3
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Bahramzadeh A, Bolandnazar K, Meshkani R. Resveratrol as a potential protective compound against skeletal muscle insulin resistance. Heliyon 2023; 9:e21305. [PMID: 38027557 PMCID: PMC10660041 DOI: 10.1016/j.heliyon.2023.e21305] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 10/17/2023] [Accepted: 10/19/2023] [Indexed: 12/01/2023] Open
Abstract
The increasing prevalence of type 2 diabetes has become a major global problem. Insulin resistance has a central role in pathophysiology of type 2 diabetes. Skeletal muscle is responsible for the disposal of most of the glucose under conditions of insulin stimulation, and insulin resistance in skeletal muscle causes dysregulation of glucose homeostasis in the whole body. Despite the current pharmaceutical and non-pharmacological treatment strategies to combat diabetes, there is still a need for new therapeutic agents due to the limitations of the therapeutic agents. Meanwhile, plant polyphenols have attracted the attention of researchers for their use in the treatment of diabetes and have gained popularity. Resveratrol, a stilbenoid polyphenol, exists in various plant sources, and a growing body of evidence suggests its beneficial properties, including antidiabetic activities. The present review aimed to provide a summary of the role of resveratrol in insulin resistance in skeletal muscle and its related mechanisms. To achieve the objectives, by searching the PubMed, Scopus and Web of Science databases, we have summarized the results of all cell culture, animal, and human studies that have investigated the effects of resveratrol in different models on insulin resistance in skeletal muscle.
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Affiliation(s)
- Arash Bahramzadeh
- Department of Clinical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Kosar Bolandnazar
- Department of Biological Sciences and Technology, Islamic Azad University of Mashhad, Mashhad, Iran
| | - Reza Meshkani
- Department of Clinical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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4
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Cao R, Tian H, Zhang Y, Liu G, Xu H, Rao G, Tian Y, Fu X. Signaling pathways and intervention for therapy of type 2 diabetes mellitus. MedComm (Beijing) 2023; 4:e283. [PMID: 37303813 PMCID: PMC10248034 DOI: 10.1002/mco2.283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 04/18/2023] [Accepted: 04/27/2023] [Indexed: 06/13/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) represents one of the fastest growing epidemic metabolic disorders worldwide and is a strong contributor for a broad range of comorbidities, including vascular, visual, neurological, kidney, and liver diseases. Moreover, recent data suggest a mutual interplay between T2DM and Corona Virus Disease 2019 (COVID-19). T2DM is characterized by insulin resistance (IR) and pancreatic β cell dysfunction. Pioneering discoveries throughout the past few decades have established notable links between signaling pathways and T2DM pathogenesis and therapy. Importantly, a number of signaling pathways substantially control the advancement of core pathological changes in T2DM, including IR and β cell dysfunction, as well as additional pathogenic disturbances. Accordingly, an improved understanding of these signaling pathways sheds light on tractable targets and strategies for developing and repurposing critical therapies to treat T2DM and its complications. In this review, we provide a brief overview of the history of T2DM and signaling pathways, and offer a systematic update on the role and mechanism of key signaling pathways underlying the onset, development, and progression of T2DM. In this content, we also summarize current therapeutic drugs/agents associated with signaling pathways for the treatment of T2DM and its complications, and discuss some implications and directions to the future of this field.
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Affiliation(s)
- Rong Cao
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
| | - Huimin Tian
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China Medical School, West China HospitalSichuan UniversityChengduSichuanChina
| | - Yu Zhang
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China Medical School, West China HospitalSichuan UniversityChengduSichuanChina
| | - Geng Liu
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
| | - Haixia Xu
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
| | - Guocheng Rao
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China Medical School, West China HospitalSichuan UniversityChengduSichuanChina
| | - Yan Tian
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
| | - Xianghui Fu
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengduSichuanChina
- Department of Endocrinology and MetabolismState Key Laboratory of Biotherapy and Cancer CenterWest China Medical School, West China HospitalSichuan UniversityChengduSichuanChina
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Type 2 Diabetes and Alzheimer's Disease: The Emerging Role of Cellular Lipotoxicity. Biomolecules 2023; 13:biom13010183. [PMID: 36671568 PMCID: PMC9855893 DOI: 10.3390/biom13010183] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/06/2023] [Accepted: 01/13/2023] [Indexed: 01/18/2023] Open
Abstract
Type 2 diabetes (T2D) and Alzheimer's diseases (AD) represent major health issues that have reached alarming levels in the last decades. Although growing evidence demonstrates that AD is a significant comorbidity of T2D, and there is a ~1.4-2-fold increase in the risk of developing AD among T2D patients, the involvement of possible common triggers in the pathogenesis of these two diseases remains largely unknown. Of note, recent mechanistic insights suggest that lipotoxicity could represent the missing ring in the pathogenetic mechanisms linking T2D to AD. Indeed, obesity, which represents the main cause of lipotoxicity, has been recognized as a major risk factor for both pathological conditions. Lipotoxicity can lead to inflammation, insulin resistance, oxidative stress, ceramide and amyloid accumulation, endoplasmic reticulum stress, ferroptosis, and autophagy, which are shared biological events in the pathogenesis of T2D and AD. In the current review, we try to provide a critical and comprehensive view of the common molecular pathways activated by lipotoxicity in T2D and AD, attempting to summarize how these mechanisms can drive future research and open the way to new therapeutic perspectives.
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Shen M, Kang Y. Cancer fitness genes: emerging therapeutic targets for metastasis. Trends Cancer 2023; 9:69-82. [PMID: 36184492 DOI: 10.1016/j.trecan.2022.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/25/2022] [Accepted: 08/30/2022] [Indexed: 12/31/2022]
Abstract
Development of cancer therapeutics has traditionally focused on targeting driver oncogenes. Such an approach is limited by toxicity to normal tissues and treatment resistance. A class of 'cancer fitness genes' with crucial roles in metastasis have been identified. Elevated or altered activities of these genes do not directly cause cancer; instead, they relieve the stresses that tumor cells encounter and help them adapt to a changing microenvironment, thus facilitating tumor progression and metastasis. Importantly, as normal cells do not experience high levels of stress under physiological conditions, targeting cancer fitness genes is less likely to cause toxicity to noncancerous tissues. Here, we summarize the key features and function of cancer fitness genes and discuss their therapeutic potential.
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Affiliation(s)
- Minhong Shen
- Department of Pharmacology, Wayne State University School of Medicine, Michigan, MI, USA; Department of Oncology, Wayne State University School of Medicine and Tumor Biology and Microenvironment Research Program, Barbara Ann Karmanos Cancer Institute, Michigan, MI, USA.
| | - Yibin Kang
- Department of Molecular Biology, Princeton University, Princeton, NJ, USA; Ludwig Institute for Cancer Research Princeton Branch, Princeton, NJ, USA.
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7
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Dogan SA, Giacchin G, Zito E, Viscomi C. Redox Signaling and Stress in Inherited Myopathies. Antioxid Redox Signal 2022; 37:301-323. [PMID: 35081731 DOI: 10.1089/ars.2021.0266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Significance: Reactive oxygen species (ROS) are highly reactive compounds that behave like a double-edged sword; they damage cellular structures and act as second messengers in signal transduction. Mitochondria and endoplasmic reticulum (ER) are interconnected organelles with a central role in ROS production, detoxification, and oxidative stress response. Skeletal muscle is the most abundant tissue in mammals and one of the most metabolically active ones and thus relies mainly on oxidative phosphorylation (OxPhos) to synthesize adenosine triphosphate. The impairment of OxPhos leads to myopathy and increased ROS production, thus affecting both redox poise and signaling. In addition, ROS enter the ER and trigger ER stress and its maladaptive response, which also lead to a myopathic phenotype with mitochondrial involvement. Here, we review the role of ROS signaling in myopathies due to either mitochondrial or ER dysfunction. Recent Advances: Relevant advances have been evolving over the last 10 years on the intricate ROS-dependent pathways that act as modifiers of the disease course in several myopathies. To this end, pathways related to mitochondrial biogenesis, satellite cell differentiation, and ER stress have been studied extensively in myopathies. Critical Issues: The analysis of the chemistry and the exact quantitation, as well as the localization of ROS, are still challenging due to the intrinsic labile nature of ROS and the technical limitations of their sensors. Future Directions: The mechanistic studies of the pathogenesis of mitochondrial and ER-related myopathies offer a unique possibility to discover novel ROS-dependent pathways. Antioxid. Redox Signal. 37, 301-323.
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Affiliation(s)
- Sukru Anil Dogan
- Department of Molecular Biology and Genetics, Center for Life Sciences and Technologies, Bogazici University, Istanbul, Turkey
| | - Giacomo Giacchin
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Ester Zito
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy.,Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Carlo Viscomi
- Department of Biomedical Sciences, University of Padova, Padova, Italy
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8
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Zhang ZY, Limbu SM, Zhao SH, Chen LQ, Luo Y, Zhang ML, Qiao F, Du ZY. Dietary l-carnitine supplementation recovers the increased pH and hardness in fillets caused by high-fat diet in Nile tilapia (Oreochromis niloticus). Food Chem 2022; 382:132367. [PMID: 35152027 DOI: 10.1016/j.foodchem.2022.132367] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 01/09/2022] [Accepted: 02/04/2022] [Indexed: 11/18/2022]
Abstract
The wide use of high-fat diet (HFD) causes negative effects on flesh quality in farmed fish. l-carnitine, a lipid-lowering additive, enhances mitochondrial fatty acid β-oxidation. However its roles in alleviating the effects of HFD on flesh quality in fish are unknown. We fed Nile tilapia with medium-fat diet (MFD, 6% dietary lipid), high-fat diet (HFD, 12% dietary lipid) and HFCD supplemented with l-carnitine (HFCD + 400 mg/kg l-carnitine) for 10 weeks. The HFD-fed fish had higher fat deposition, pH value, myofiber density and flesh hardness than those fed on MFD. However, feeding the fish with the HFCD improved lipid catabolism, which increased significantly lactic acid content and myofiber diameter in muscle, thus reduced pH and hardness values. HFCD also reduced endoplasmic reticulum stress and myofiber apoptosis caused by HFD in the fish. Our study suggests that dietary l-carnitine supplementation alleviates the negative effects of HFD on flesh quality of farmed fish.
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Affiliation(s)
- Zhi-Yong Zhang
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Samwel M Limbu
- Department of Aquaculture Technology, School of Aquatic Sciences and Fisheries Technology, University of Dar es Salaam, P. O. Box 60091, Dar es Salaam, Tanzania; ECNU-UDSM Joint Research Center for Aquaculture and Fish Biology (JRCAFB), Dar es Salaam, Tanzania
| | - Si-Han Zhao
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Li-Qiao Chen
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Yuan Luo
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Mei-Ling Zhang
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Fang Qiao
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Zhen-Yu Du
- Laboratory of Aquaculture Nutrition and Environmental Health (LANEH), School of Life Sciences, East China Normal University, Shanghai 200241, PR China; ECNU-UDSM Joint Research Center for Aquaculture and Fish Biology (JRCAFB), Shanghai, PR China.
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9
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Kny M, Fielitz J. Hidden Agenda - The Involvement of Endoplasmic Reticulum Stress and Unfolded Protein Response in Inflammation-Induced Muscle Wasting. Front Immunol 2022; 13:878755. [PMID: 35615361 PMCID: PMC9124858 DOI: 10.3389/fimmu.2022.878755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/04/2022] [Indexed: 11/13/2022] Open
Abstract
Critically ill patients at the intensive care unit (ICU) often develop a generalized weakness, called ICU-acquired weakness (ICUAW). A major contributor to ICUAW is muscle atrophy, a loss of skeletal muscle mass and function. Skeletal muscle assures almost all of the vital functions of our body. It adapts rapidly in response to physiological as well as pathological stress, such as inactivity, immobilization, and inflammation. In response to a reduced workload or inflammation muscle atrophy develops. Recent work suggests that adaptive or maladaptive processes in the endoplasmic reticulum (ER), also known as sarcoplasmic reticulum, contributes to this process. In muscle cells, the ER is a highly specialized cellular organelle that assures calcium homeostasis and therefore muscle contraction. The ER also assures correct folding of proteins that are secreted or localized to the cell membrane. Protein folding is a highly error prone process and accumulation of misfolded or unfolded proteins can cause ER stress, which is counteracted by the activation of a signaling network known as the unfolded protein response (UPR). Three ER membrane residing molecules, protein kinase R-like endoplasmic reticulum kinase (PERK), inositol requiring protein 1a (IRE1a), and activating transcription factor 6 (ATF6) initiate the UPR. The UPR aims to restore ER homeostasis by reducing overall protein synthesis and increasing gene expression of various ER chaperone proteins. If ER stress persists or cannot be resolved cell death pathways are activated. Although, ER stress-induced UPR pathways are known to be important for regulation of skeletal muscle mass and function as well as for inflammation and immune response its function in ICUAW is still elusive. Given recent advances in the development of ER stress modifying molecules for neurodegenerative diseases and cancer, it is important to know whether or not therapeutic interventions in ER stress pathways have favorable effects and these compounds can be used to prevent or treat ICUAW. In this review, we focus on the role of ER stress-induced UPR in skeletal muscle during critical illness and in response to predisposing risk factors such as immobilization, starvation and inflammation as well as ICUAW treatment to foster research for this devastating clinical problem.
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Affiliation(s)
- Melanie Kny
- Experimental and Clinical Research Center (ECRC), Charité-Universitätsmedizin Berlin, Max Delbrück Center (MDC) for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Jens Fielitz
- Department of Molecular Cardiology, DZHK (German Center for Cardiovascular Research), Partner Site, Greifswald, Germany
- Department of Internal Medicine B, Cardiology, University Medicine Greifswald, Greifswald, Germany
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Kido K, Egawa T, Watanabe S, Kawanaka K, Treebak JT, Hayashi T. Fasting potentiates insulin-mediated glucose uptake in rested and prior-contracted rat skeletal muscle. Am J Physiol Endocrinol Metab 2022; 322:E425-E435. [PMID: 35344394 DOI: 10.1152/ajpendo.00412.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A single bout of exercise can potentiate the effect of insulin on skeletal muscle glucose uptake via activation of the AMPK-TBC1 domain family member 4 (TBC1D4) pathway, which suggests a positive correlation between AMPK activation and insulin sensitization. In addition, prolonged fasting in rodents is known to upregulate and thereby synergistically enhance the effect of exercise on muscle AMPK activation. Therefore, fasting may potentiate the insulin-sensitizing effect of exercise. In the present study, we mimicked exercise by in situ muscle contraction and evaluated the effect of a 36-h fast on muscle contraction-induced insulin sensitization. Male Wistar rats weighing 150-170 g were allocated to either a 36-h fasting or feeding group. The extensor digitorum longus (EDL) muscles were electrically contracted via the common peroneal nerve for 10 min followed by a 3-h recovery period. EDL muscles were dissected and incubated in the presence or absence of submaximal insulin. Our results demonstrated that acute muscle contraction and 36 h of fasting additively upregulated AMPK pathway activation. Insulin-stimulated muscle glucose uptake and site-specific TBC1D4 phosphorylation were enhanced by prior muscle contraction in 36-h-fasted rats, but not in fed rats. Moreover, enhanced insulin-induced muscle glucose uptake and Akt phosphorylation due to 36 h of fasting were associated with a decrease in tribbles homolog 3 (TRB3), a negative regulator of Akt activation. In conclusion, fasting and prior muscle contraction synergistically enhance insulin-stimulated TBC1D4 phosphorylation and glucose uptake, which is associated with augmented AMPK pathway activation in rodents.NEW & NOTEWORTHY In this study, we revealed that 36 h of fasting additively upregulated acute muscle contraction-induced AMPK pathway activation in rats. Besides, fasting and muscle contraction synergistically enhanced insulin-stimulated site-specific TBC1D4 phosphorylation and glucose uptake, which was associated with augmented AMPK pathway activation. These results contribute to understanding the regulation of muscle insulin sensitivity.
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Affiliation(s)
- Kohei Kido
- Laboratory of Sports and Exercise Medicine, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
- Institute for Physical Activity, Fukuoka University, Fukuoka, Japan
| | - Tatsuro Egawa
- Laboratory of Sports and Exercise Medicine, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Shinya Watanabe
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
| | - Kentaro Kawanaka
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
- Institute for Physical Activity, Fukuoka University, Fukuoka, Japan
| | - Jonas T Treebak
- Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Tatsuya Hayashi
- Laboratory of Sports and Exercise Medicine, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
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11
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Bishop CA, Machate T, Henning T, Henkel J, Püschel G, Weber D, Grune T, Klaus S, Weitkunat K. Detrimental effects of branched-chain amino acids in glucose tolerance can be attributed to valine induced glucotoxicity in skeletal muscle. Nutr Diabetes 2022; 12:20. [PMID: 35418570 PMCID: PMC9008040 DOI: 10.1038/s41387-022-00200-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 03/25/2022] [Accepted: 03/29/2022] [Indexed: 12/04/2022] Open
Abstract
Objective Current data regarding the roles of branched-chain amino acids (BCAA) in metabolic health are rather conflicting, as positive and negative effects have been attributed to their intake. Methods To address this, individual effects of leucine and valine were elucidated in vivo (C57BL/6JRj mice) with a detailed phenotyping of these supplementations in high-fat (HF) diets and further characterization with in vitro approaches (C2C12 myocytes). Results Here, we demonstrate that under HF conditions, leucine mediates beneficial effects on adiposity and insulin sensitivity, in part due to increasing energy expenditure—likely contributing partially to the beneficial effects of a higher milk protein intake. On the other hand, valine feeding leads to a worsening of HF-induced health impairments, specifically reducing glucose tolerance/insulin sensitivity. These negative effects are driven by an accumulation of the valine-derived metabolite 3-hydroxyisobutyrate (3-HIB). Higher plasma 3-HIB levels increase basal skeletal muscle glucose uptake which drives glucotoxicity and impairs myocyte insulin signaling. Conclusion These data demonstrate the detrimental role of valine in an HF context and elucidate additional targetable pathways in the etiology of BCAA-induced obesity and insulin resistance. ![]()
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Affiliation(s)
- Christopher A Bishop
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany. .,University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany.
| | - Tina Machate
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany.,University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Thorsten Henning
- University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany.,Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Janin Henkel
- University of Potsdam, Institute of Nutrition Science, Nutritional Biochemistry Dept, Nuthetal, 14558, Germany.,University of Bayreuth, Faculty of Life Science, Department of Nutritional Biochemistry, Kulmbach, 95326, Germany
| | - Gerhard Püschel
- University of Potsdam, Institute of Nutrition Science, Nutritional Biochemistry Dept, Nuthetal, 14558, Germany
| | - Daniela Weber
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Tilman Grune
- University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany.,Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Susanne Klaus
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany.,University of Potsdam, Institute of Nutrition Science, Potsdam-Rehbruecke, Nuthetal, 14558, Germany
| | - Karolin Weitkunat
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, 14558, Germany
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12
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Kemas AM, Youhanna S, Lauschke VM. Non-alcoholic fatty liver disease - opportunities for personalized treatment and drug development. EXPERT REVIEW OF PRECISION MEDICINE AND DRUG DEVELOPMENT 2022. [DOI: 10.1080/23808993.2022.2053285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Aurino M. Kemas
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Sonia Youhanna
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Volker M. Lauschke
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
- Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
- University of Tuebingen, Tuebingen, Germany
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13
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Lee SK, Park CY, Kim J, Kim D, Choe H, Kim JH, Hong JP, Lee YJ, Heo Y, Park HS, Jang YJ. TRIB3 Is Highly Expressed in the Adipose Tissue of Obese Patients and Is Associated With Insulin Resistance. J Clin Endocrinol Metab 2022; 107:e1057-e1073. [PMID: 34718616 DOI: 10.1210/clinem/dgab780] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Indexed: 11/19/2022]
Abstract
CONTEXT The upregulation of TRIB3 (Tribbles homolog 3), a stress-inducible gene encoding a pseudokinase, has been implicated in the development of insulin resistance in the skeletal muscle and liver of patients with obesity and type 2 diabetes. However, there is little information regarding TRIB3 expression in human adipose tissue. OBJECTIVE To investigate whether TRIB3 expression is dysregulated in human adipose tissue in the context of obesity and type 2 diabetes and whether TRIB3 expression in adipose tissues is associated with insulin resistance. METHODS We measured metabolic parameters and TRIB3 expression in abdominal subcutaneous and visceral adipose tissue in obese (with or without type 2 diabetes) and normal-weight women. Regulation of TRIB3 expression was studied in human adipocytes. RESULTS TRIB3 expression in both fat depots was higher in patients with obesity and/or type 2 diabetes; in addition, the expression level was significantly associated with insulin resistance. Incubating adipocytes under conditions mimicking the microenvironment of obese adipose tissue, including increased endoplasmic reticulum (ER) stress, induced TRIB3 expression. In human adipocytes, the overexpression of TRIB3 impaired insulin-stimulated protein kinase B (AKT) phosphorylation and caused dysregulation of the transcription of genes encoding bioactive molecules released from adipocytes, such as proinflammatory cytokines, adiponectin, and leptin. Pioglitazone, an insulin-sensitizing agent, reduced both these effects of TRIB3 and the ER stressor-induced expression of TRB3. CONCLUSION Our data indicate that TRIB3 expression in adipose tissue is enhanced in patients with obesity and suggest that increased TRIB3 dysregulates adipocyte function, which may contribute to the development of insulin resistance.
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Affiliation(s)
- Seul Ki Lee
- Department of Physiology, University of Ulsan College of Medicine, Seoul, Korea
- Brexogen Research Center, Brexogen Inc., Seoul, Korea
| | - Chan Yoon Park
- Department of Physiology, University of Ulsan College of Medicine, Seoul, Korea
- Department of Food Science and Nutrition, The University of Suwon, Hwaseong, Korea
| | - Jimin Kim
- Department of Physiology, University of Ulsan College of Medicine, Seoul, Korea
- Brexogen Research Center, Brexogen Inc., Seoul, Korea
| | - Donguk Kim
- Department of Physiology, University of Ulsan College of Medicine, Seoul, Korea
| | - Han Choe
- Department of Physiology, University of Ulsan College of Medicine, Seoul, Korea
| | - Jong-Hyeok Kim
- Department of Obstetrics and Gynecology, University of Ulsan College of Medicine, Seoul, Korea
| | - Joon Pio Hong
- Department of Plastic Surgery, University of Ulsan College of Medicine, Seoul, Korea
| | - Yeon Ji Lee
- Department of Family Medicine, Inha University School of Medicine, Incheon, Korea
| | - Yoonseok Heo
- Department of General Surgery, Inha University School of Medicine, Incheon, Korea
| | - Hye Soon Park
- Department of Family Medicine, University of Ulsan College of Medicine, Seoul, Korea
| | - Yeon Jin Jang
- Department of Physiology, University of Ulsan College of Medicine, Seoul, Korea
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14
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Demirel-Yalciner T, Sozen E, Ozer NK. Endoplasmic Reticulum Stress and miRNA Impairment in Aging and Age-Related Diseases. FRONTIERS IN AGING 2022; 2:790702. [PMID: 35822008 PMCID: PMC9261320 DOI: 10.3389/fragi.2021.790702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 12/14/2021] [Indexed: 11/20/2022]
Abstract
Aging is a physiological process defined by decreased cellular and tissue functions. Reduced capacity of protein degradation is one of the important hallmarks of aging that may lead to misfolded protein accumulation and progressive loss of function in organ systems. Recognition of unfolded/misfolded protein aggregates via endoplasmic reticulum (ER) stress sensors activates an adaptive mechanism, the unfolded protein response (UPR). The initial step of UPR is defined by chaperone enhancement, ribosomal translation suppression, and misfolded protein degradation, while prolonged ER stress triggers apoptosis. MicroRNAs (miRNAs) are non-coding RNAs affecting various signaling pathways through degradation or translational inhibition of targeted mRNAs. Therefore, UPR and miRNA impairment in aging and age-related diseases is implicated in various studies. This review will highlight the recent insights in ER stress–miRNAs alterations during aging and age-related diseases, including metabolic, cardiovascular, and neurodegenerative diseases and several cancers.
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Affiliation(s)
| | - Erdi Sozen
- Department of Biochemistry, Faculty of Medicine, Marmara University, Maltepe, Turkey
- Genetic and Metabolic Diseases Research and Investigation Center (GEMHAM), Marmara University, Maltepe, Turkey
| | - Nesrin Kartal Ozer
- Department of Biochemistry, Faculty of Medicine, Marmara University, Maltepe, Turkey
- *Correspondence: Nesrin Kartal Ozer,
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15
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Lee CH, Chiang CF, Lin FH, Kuo FC, Su SC, Huang CL, Li PF, Liu JS, Lu CH, Hsieh CH, Hung YJ, Shieh YS. PDIA4, a new endoplasmic reticulum stress protein, modulates insulin resistance and inflammation in skeletal muscle. Front Endocrinol (Lausanne) 2022; 13:1053882. [PMID: 36619574 PMCID: PMC9816868 DOI: 10.3389/fendo.2022.1053882] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 12/09/2022] [Indexed: 12/24/2022] Open
Abstract
INTRODUCTION Endoplasmic reticulum (ER) stress has emerged as a key player in insulin resistance (IR) progression in skeletal muscle. Recent reports revealed that ER stress-induced the expression of protein disulfide isomerase family a member 4 (PDIA4), which may be involved in IR-related diseases. A previous study showed that metformin modulated ER stress-induced IR. However, it remained unclear whether metformin alleviated IR by regulating PDIA4 expression in skeletal muscle. METHODS Herein, we used palmitate-induced IR in C2C12 cells and a high-fat diet-induced IR mouse model to document the relations between metformin, IR, and PDIA4. RESULTS In C2C12 cells, palmitate-induced IR increased inflammatory cytokines and PDIA4 expression. Besides, knocking down PDIA4 decreased palmitate-induced IR and inflammation in C2C12 cells. Furthermore, metformin modulated PDIA4 expression and alleviated IR both in vitro and in vivo. In addition, serum PDIA4 concentrations are associated with IR and inflammatory cytokines levels in human subjects. DISCUSSION Thus, this study is the first to demonstrate that PDIA4 participates in the metformin-induced effects on skeletal muscle IR and indicates that PDIA4 is a potential novel therapeutic target for directly alleviating IR.
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Affiliation(s)
- Chien-Hsing Lee
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
- Department and Graduate Institute of Biochemistry, National Defense Medical Center, Taipei, Taiwan
- *Correspondence: Chien-Hsing Lee,
| | - Chi-Fu Chiang
- School of Dentistry, National Defense Medical Center, Taipei, Taiwan
| | - Fu-Huang Lin
- School of Public Health, National Defense Medical Center, Taipei, Taiwan
| | - Feng-Chih Kuo
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Sheng-Chiang Su
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chia-Luen Huang
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Peng-Fei Li
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Jhih-Syuan Liu
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chieh-Hua Lu
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Chang-Hsun Hsieh
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Yi-Jen Hung
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
- Department and Graduate Institute of Biochemistry, National Defense Medical Center, Taipei, Taiwan
| | - Yi-Shing Shieh
- Division of Endocrinology and Metabolism, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
- Department and Graduate Institute of Biochemistry, National Defense Medical Center, Taipei, Taiwan
- School of Dentistry, National Defense Medical Center, Taipei, Taiwan
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16
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Gilbert M. Role of skeletal muscle lipids in the pathogenesis of insulin resistance of obesity and type 2 diabetes. J Diabetes Investig 2021; 12:1934-1941. [PMID: 34132491 PMCID: PMC8565406 DOI: 10.1111/jdi.13614] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 12/25/2022] Open
Abstract
Obesity predisposes individuals to the development of insulin resistance, which is a risk factor for type 2 diabetes, and muscle plays a central role in this phenomenon. Insulin resistance is associated with: (i) a metabolic inflexibility characterized by a reduced impaired switching from free fatty acid (FA) to carbohydrate substrates; and (ii) an ectopic accumulation of triglyceride in skeletal muscle, generating a cellular "lipotoxicity", but triglyceride per se, does not contribute to insulin resistance ("athlete's paradox"). A large body of evidence supports the idea that a decreased mitochondrial capacity to oxidize FA leads to an accretion of intracellular triglyceride and an accumulation of acyl-CoAs, which are used to synthesize diacylglycerol and ceramide. These lipid derivatives activate serine kinases, leading to increase of insulin receptor substrate 1 serine phosphorylation, which impairs insulin signaling. A second model proposes that insulin resistance arises from an excessive mitochondrial FA oxidation. Studies have shown that the type of FA, unsaturated or saturated, is critical in the development of insulin resistance. It should be also stressed that FA oversupply activates inflammatory signals, induces endoplasmic reticulum stress, increases mitochondrial oxidative stress and influences the regulation of genes that contributes to impaired glucose metabolism. These cellular insults are thought to engage stress-sensitive serine kinases disrupting insulin signaling. In conclusion, reduced dietary lipid intake in association with physical exercise could be a therapeutic option to improve insulin sensitivity.
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Affiliation(s)
- Marc Gilbert
- CNRS UMR 8251 Bât. BuffonParis Diderot UniversityParisFrance
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17
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Li JB, Xi WS, Tan SY, Liu YY, Wu H, Liu Y, Cao A, Wang H. Effects of VO 2 nanoparticles on human liver HepG2 cells: Cytotoxicity, genotoxicity, and glucose and lipid metabolism disorders. NANOIMPACT 2021; 24:100351. [PMID: 35559810 DOI: 10.1016/j.impact.2021.100351] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 07/26/2021] [Accepted: 08/16/2021] [Indexed: 06/15/2023]
Abstract
The rapid development of smart materials stimulates the production of vanadium dioxide (VO2) nanomaterials. This significantly increases the population exposure to VO2 nanomaterials via different pathways, and thus urges us to pay more attentions to their biosafety. Liver is the primary accumulation organ of nanomaterials in vivo, but the knowledge of effects of VO2 nanomaterials on the liver is extremely lacking. In this work, we comprehensively evaluated the effects of a commercial VO2 nanoparticle, S-VO2, in a liver cell line HepG2 to illuminate the potential hepatic toxicity of VO2 nanomaterials. The results indicated that S-VO2 was cytotoxic and genotoxic to HepG2 cells, mainly by inhibiting the cell proliferation. Apoptosis was observed at higher dose of S-VO2, while DNA damage was detected at all tested concentrations. S-VO2 particles were internalized by HepG2 cells and kept almost intact inside cells. Both the particle and dissolved species of S-VO2 contributed to the observed toxicities. They induced the overproduction of ROS, and then caused the mitochondrial dysfunction, ATP synthesis interruption, and DNA damages, consequently arrested the cell cycle in G2/M phase and inhibited the proliferation of HepG2 cells. The S-VO2 exposure also resulted in the upregulations of glucose uptake and lipid content in HepG2 cells, which were attributed to the ROS production and autophagy flux block, respectively. Our findings offer valuable insights into the liver toxicity of VO2 nanomaterials, benefiting their safely practical applications.
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Affiliation(s)
- Jia-Bei Li
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Wen-Song Xi
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Shi-Ying Tan
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Yuan-Yuan Liu
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Hao Wu
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Yuanfang Liu
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China; Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Aoneng Cao
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China.
| | - Haifang Wang
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China.
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18
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Qu Z, Liu A, Liu C, Tang Q, Zhan L, Xiao W, Huang J, Liu Z, Zhang S. Theaflavin Promotes Mitochondrial Abundance and Glucose Absorption in Myotubes by Activating the CaMKK2-AMPK Signal Axis via Calcium-Ion Influx. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:8144-8159. [PMID: 34260232 DOI: 10.1021/acs.jafc.1c02892] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Drinking tea has been proven to have a positive biological effect in regulating human glucose and lipid metabolism and preventing type 2 diabetes (T2D). Skeletal muscle (SkM) is responsible for 70% of the sugar metabolism in the human body, and its dysfunction is an important factor leading to the development of obesity, T2D, and muscle diseases. As one of the four known theaflavins (TFs) in black tea, the biological role of theaflavin (TF1) in regulating SkM metabolism has not been reported. In this study, mature myotubes induced by C2C12 cells in vitro were used as models. The results showed that TF1 (20 μM) promoted mitochondrial abundance and glucose absorption in myotubes by activating the CaMKK2-AMPK signaling axis via Ca2+ influx. Moreover, it promoted the expression of slow muscle fiber marker genes (Myh7, Myl2, Tnnt1, and Tnnc1) and PGC-1α/SIRT1, as well as enhanced the oxidative phosphorylation capacity of myotubes. In conclusion, this study preliminarily clarified the potential role of TF1 in regulating SkM glucose absorption as well as promoting SkM mitochondrial biosynthesis and slow muscle fiber formation. It has potential research and application values for the prevention/alleviation of SkM-related T2D and Ca2+-related skeletal muscle diseases through diet.
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Affiliation(s)
- Zhihao Qu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, Hunan, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, Hunan, China
| | - Ailing Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, Hunan, China
| | - Changwei Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, Hunan, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, Hunan, China
| | - Quanquan Tang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, Hunan, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, Hunan, China
| | - Li Zhan
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, Hunan, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, Hunan, China
| | - Wenjun Xiao
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, Hunan, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, Hunan, China
| | - Jianan Huang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, Hunan, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, Hunan, China
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, Hunan, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, Hunan, China
| | - Sheng Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, Hunan, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, Hunan, China
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19
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Parks SZ, Gao T, Jimenez Awuapura N, Ayathamattam J, Chabosseau PL, Kalvakolanu DV, Valdivia HH, Rutter GA, Leclerc I. The Ca 2+ -binding protein sorcin stimulates transcriptional activity of the unfolded protein response mediator ATF6. FEBS Lett 2021; 595:1782-1796. [PMID: 33960419 DOI: 10.1002/1873-3468.14101] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 12/13/2022]
Abstract
Sorcin is a calcium-binding protein involved in maintaining endoplasmic reticulum (ER) Ca2+ stores. We have previously shown that overexpressing sorcin under the rat insulin promoter was protective against high-fat diet-induced pancreatic beta-cell dysfunction in vivo. Activating transcription factor 6 (ATF6) is a key mediator of the unfolded protein response (UPR) that provides cellular protection during the progression of ER stress. Here, using nonexcitable HEK293 cells, we show that sorcin overexpression increased ATF6 signalling, whereas sorcin knock out caused a reduction in ATF6 transcriptional activity and increased ER stress. Altogether, our data suggest that sorcin downregulation during lipotoxic stress may prevent full ATF6 activation and a normal UPR during the progression of obesity and insulin resistance.
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Affiliation(s)
- Steven Z Parks
- Section of Cell Biology and Functional Genomics, Department of Metabolism, Digestion & Reproduction, Imperial College London, UK
| | - Tian Gao
- Section of Cell Biology and Functional Genomics, Department of Metabolism, Digestion & Reproduction, Imperial College London, UK
| | - Natalia Jimenez Awuapura
- Section of Cell Biology and Functional Genomics, Department of Metabolism, Digestion & Reproduction, Imperial College London, UK
| | - Joseph Ayathamattam
- Section of Cell Biology and Functional Genomics, Department of Metabolism, Digestion & Reproduction, Imperial College London, UK
| | - Pauline L Chabosseau
- Section of Cell Biology and Functional Genomics, Department of Metabolism, Digestion & Reproduction, Imperial College London, UK
| | - Dhananjaya V Kalvakolanu
- Departments of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Héctor H Valdivia
- Cardiovascular Research Center, University of Wisconsin-Madison, WI, USA
| | - Guy A Rutter
- Section of Cell Biology and Functional Genomics, Department of Metabolism, Digestion & Reproduction, Imperial College London, UK
| | - Isabelle Leclerc
- Section of Cell Biology and Functional Genomics, Department of Metabolism, Digestion & Reproduction, Imperial College London, UK
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20
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Abstract
Diabetic heart disease is a growing and important public health risk. Apart from the risk of coronary artery disease or hypertension, diabetes mellitus (DM) is a well-known risk factor for heart failure in the form of diabetic cardiomyopathy (DiaCM). Currently, DiaCM is defined as myocardial dysfunction in patients with DM in the absence of coronary artery disease and hypertension. The underlying pathomechanism of DiaCM is partially understood, but accumulating evidence suggests that metabolic derangements, oxidative stress, increased myocardial fibrosis and hypertrophy, inflammation, enhanced apoptosis, impaired intracellular calcium handling, activation of the renin-angiotensin-aldosterone system, mitochondrial dysfunction, and dysregulation of microRNAs, among other factors, are involved. Numerous animal models have been used to investigate the pathomechanisms of DiaCM. Despite some limitations, animal models for DiaCM have greatly advanced our understanding of pathomechanisms and have helped in the development of successful disease management strategies. In this review, we summarize the current pathomechanisms of DiaCM and provide animal models for DiaCM according to its pathomechanisms, which may contribute to broadening our understanding of the underlying mechanisms and facilitating the identification of possible new therapeutic targets.
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Affiliation(s)
- Wang-Soo Lee
- Division of Cardiology, Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
- Corresponding authors: Wang-Soo Lee https://orcid.org/0000-0002-8264-0866 Division of Cardiology, Department of Internal Medicine, Chung-Ang University Hospital, 102 Heukseok-ro, Dongjak-gu, Seoul 06973, Korea E-mail:
| | - Jaetaek Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
- Corresponding authors: Wang-Soo Lee https://orcid.org/0000-0002-8264-0866 Division of Cardiology, Department of Internal Medicine, Chung-Ang University Hospital, 102 Heukseok-ro, Dongjak-gu, Seoul 06973, Korea E-mail:
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21
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Obesity-induced TRB3 negatively regulates Brown adipose tissue function in mice. Biochem Biophys Res Commun 2021; 547:29-35. [PMID: 33592376 DOI: 10.1016/j.bbrc.2021.01.103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 01/28/2021] [Indexed: 12/26/2022]
Abstract
Brown adipose tissue (BAT) and stimulating adaptive thermogenesis have been implicated as anti-obese and anti-diabetic tissues due to their ability to dissipate energy as heat by the expression of UCP1. We have recently demonstrated that TRB3 impairs differentiation of brown preadipocytes via inhibiting insulin signaling. However, the roles of the protein in BAT function and thermogenesis in vivo have not yet been established. For this study we tested the hypothesis that TRB3 mediates obesity- and diabetes-induced impairments in BAT differentiation and function, and that inhibition of TRB3 improves BAT function. TRB3 expression was increased in BAT from high-fat fed mice and ob/ob mice, which was associated with decreased UCP1 expression. Incubation of brown adipocytes with palmitate increased TRB3 expression and decreased UCP1. Knockout of TRB3 in mice displayed higher UCP1 expression in BAT and cold resistance. Incubation of brown adipocytes with ER stressors increased TRB3 but decreased UCP1 and ER stress markers were elevated in BAT from high-fat fed mice and ob/ob mice. Finally, high-fat feeding in TRB3KO mice were protected from obesity-induced glucose intolerance and displayed cold resistance and higher expression of BAT-specific markers. These data demonstrate that high-fat feeding and obesity increase TRB3 in BAT, resulting in impaired tissue function.
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22
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Sun Y, Ding S. ER-Mitochondria Contacts and Insulin Resistance Modulation through Exercise Intervention. Int J Mol Sci 2020; 21:ijms21249587. [PMID: 33339212 PMCID: PMC7765572 DOI: 10.3390/ijms21249587] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 12/16/2022] Open
Abstract
The endoplasmic reticulum (ER) makes physical contacts with mitochondria at specific sites, and the hubs between the two organelles are called mitochondria-associated ER membranes (MAMs). MAMs are known to play key roles in biological processes, such as intracellular Ca2+ regulation, lipid trafficking, and metabolism, as well as cell death, etc. Studies demonstrated that dysregulation of MAMs significantly contributed to insulin resistance. Alterations of MAMs’ juxtaposition and integrity, impaired expressions of insulin signaling molecules, disruption of Ca2+ homeostasis, and compromised metabolic flexibility are all actively involved in the above processes. In addition, exercise training is considered as an effective stimulus to ameliorate insulin resistance. Although the underlying mechanisms for exercise-induced improvement in insulin resistance are not fully understood, MAMs may be critical for the beneficial effects of exercise.
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Affiliation(s)
- Yi Sun
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China;
- College of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Shuzhe Ding
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention of Ministry of Education, East China Normal University, Shanghai 200241, China;
- College of Physical Education and Health, East China Normal University, Shanghai 200241, China
- Correspondence:
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23
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Cha HN, Woo CH, Kim HY, Park SY. Methionine sulfoxide reductase B3 deficiency inhibits the development of diet-induced insulin resistance in mice. Redox Biol 2020; 38:101823. [PMID: 33296856 PMCID: PMC8187883 DOI: 10.1016/j.redox.2020.101823] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 12/11/2022] Open
Abstract
Oxidative and endoplasmic reticulum (ER) stress are involved in mediating high-fat diet (HFD)-induced insulin resistance. As the ER-localized methionine sulfoxide reductase B3 (MsrB3) protects cells against oxidative and ER stress, we hypothesized that MsrB3 might be associated with HFD-induced insulin resistance. To test this hypothesis, we examined the effect of MsrB3 deficiency on HFD-induced insulin resistance using MsrB3 knockout (KO) mice. Mice were fed a control diet or HFD for 12 weeks and insulin sensitivity was measured using a hyperinsulinemic-euglycemic clamp. HFD consumption increased the body weight of both wild-type and MsrB3 KO mice, and no significant difference was observed between the genotypes. The HFD increased oxidative stress and induced insulin resistance in the skeletal muscle of wild-type mice, but did not affect either in MsrB3 KO mice. The unfolded protein response (UPR) was increased in MsrB3 KO mice upon consumption of HFD, but not in wild-type mice. Mitochondrial oxidative phosphorylation proteins and the levels of superoxide dismutase 2 and glutathione peroxidase 1 were increased in MsrB3 KO mice upon HFD consumption. The respiratory control ratio was reduced in wild-type mice consuming HFD but not in MsrB3 KO mice. The levels of calcium/calmodulin-dependent protein kinase kinase β, phosphorylated AMP-activated protein kinase, and peroxisome proliferator-activated receptor gamma coactivator 1α were increased in MsrB3 KO mice following HFD consumption. These results suggest that MsrB3 deficiency inhibits HFD-induced insulin resistance, and the increased mitochondrial biogenesis and antioxidant induction might be the mechanisms underlying this phenomenon.
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Affiliation(s)
- Hye-Na Cha
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, 42415, Republic of Korea; Smart-Aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, 42415, Republic of Korea
| | - Chang-Hoon Woo
- Smart-Aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, 42415, Republic of Korea; Department of Pharmacology, College of Medicine, Yeungnam University, Daegu, 42415, Republic of Korea
| | - Hwa-Young Kim
- Department of Biochemistry and Molecular Biology, College of Medicine, Yeungnam University, Daegu, 42415, Republic of Korea
| | - So-Young Park
- Department of Physiology, College of Medicine, Yeungnam University, Daegu, 42415, Republic of Korea; Smart-Aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, 42415, Republic of Korea.
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24
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Fan F, He J, Su H, Zhang H, Wang H, Dong Q, Zeng M, Xing W, Sun X. Tribbles Homolog 3-Mediated Vascular Insulin Resistance Contributes to Hypoxic Pulmonary Hypertension in Intermittent Hypoxia Rat Model. Front Physiol 2020; 11:542146. [PMID: 33192545 PMCID: PMC7662151 DOI: 10.3389/fphys.2020.542146] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 09/29/2020] [Indexed: 12/16/2022] Open
Abstract
This study aimed to investigate the role of vascular insulin resistance (VIR) and Tribbles homolog 3 (TRIB3) in the pathogenesis of hypoxia-induced pulmonary hypertension (HPH). Rats were subjected to low air pressure and low oxygen intermittently for 4 weeks to induce HPH. The mean right ventricular pressure (mRVP), mean pulmonary arterial pressure (mPAP), and right ventricular index (RVI) were significantly increased in HPH rats. Pulmonary arteries from HPH rats showed VIR with reduced vasodilating effect of insulin. The protein levels of peroxisome proliferator-activated receptor gamma (PPARγ), phosphoinositide 3-kinase (PI3K), phosphorylations of Akt, and endothelial nitric oxide (NO) synthase (eNOS) were decreased, and TRIB3 and phosphorylated extracellular signal-regulated protein kinases (ERK1/2) were increased in pulmonary arteries of HPH rats. Early treatment of pioglitazone (PIO) partially reversed the development of HPH, improved insulin-induced vasodilation, and alleviated the imbalance of the insulin signaling. The overexpression of TRIB3 in rat pulmonary arterial endothelial cells (PAECs) reduced the levels of PPARγ, PI3K, phosphorylated Akt (p-Akt), and phosphorylated eNOS (p-eNOS) and increased p-ERK1/2 and the synthesis of endothelin-1 (ET-1), which were further intensified under hypoxic conditions. Moreover, TRIB3 knockdown caused significant improvement in Akt and eNOS phosphorylations and, otherwise, a reduction of ERK1/2 activation in PAECs after hypoxia. In conclusion, impaired insulin-induced pulmonary vasodilation and the imbalance of insulin-induced signaling mediated by TRIB3 upregulation in the endothelium contribute to the development of HPH. Early PIO treatment improves vascular insulin sensitivity that may help to limit the progression of hypoxic pulmonary hypertension.
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Affiliation(s)
- Fang Fan
- Department of Pediatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jinxiao He
- Department of Pediatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Hui Su
- Department of Geratology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Haifeng Zhang
- Teaching Experiment Center, Fourth Military Medical University, Xi'an, China
| | - Hao Wang
- Department of Pediatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Qianqian Dong
- Department of Natural Medicine, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Minghua Zeng
- Department of Pediatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Wenjuan Xing
- School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China.,State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center, Beijing, China
| | - Xin Sun
- Department of Pediatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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25
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Brown M, Dainty S, Strudwick N, Mihai AD, Watson JN, Dendooven R, Paton AW, Paton JC, Schröder M. Endoplasmic reticulum stress causes insulin resistance by inhibiting delivery of newly synthesized insulin receptors to the cell surface. Mol Biol Cell 2020; 31:2597-2629. [PMID: 32877278 PMCID: PMC7851869 DOI: 10.1091/mbc.e18-01-0013] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 08/21/2020] [Accepted: 08/28/2020] [Indexed: 12/20/2022] Open
Abstract
Accumulation of unfolded proteins in the endoplasmic reticulum (ER) causes ER stress and activates a signaling network known as the unfolded protein response (UPR). Here we characterize how ER stress and the UPR inhibit insulin signaling. We find that ER stress inhibits insulin signaling by depleting the cell surface population of the insulin receptor. ER stress inhibits proteolytic maturation of insulin proreceptors by interfering with transport of newly synthesized insulin proreceptors from the ER to the plasma membrane. Activation of AKT, a major target of the insulin signaling pathway, by a cytosolic, membrane-bound chimera between the AP20187-inducible FV2E dimerization domain and the cytosolic protein tyrosine kinase domain of the insulin receptor was not affected by ER stress. Hence, signaling events in the UPR, such as activation of the JNK mitogen-activated protein (MAP) kinases or the pseudokinase TRB3 by the ER stress sensors IRE1α and PERK, do not contribute to inhibition of signal transduction in the insulin signaling pathway. Indeed, pharmacologic inhibition and genetic ablation of JNKs, as well as silencing of expression of TRB3, did not restore insulin sensitivity or rescue processing of newly synthesized insulin receptors in ER-stressed cells. [Media: see text].
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Affiliation(s)
- Max Brown
- Department of Biosciences, Durham University, Durham DH1 3LE, United Kingdom
- Biophysical Sciences Institute, Durham University, Durham DH1 3LE, United Kingdom
- North East England Stem Cell Institute (NESCI), Newcastle Upon Tyne NE1 4EP, United Kingdom
| | - Samantha Dainty
- Department of Biosciences, Durham University, Durham DH1 3LE, United Kingdom
- Biophysical Sciences Institute, Durham University, Durham DH1 3LE, United Kingdom
- North East England Stem Cell Institute (NESCI), Newcastle Upon Tyne NE1 4EP, United Kingdom
| | - Natalie Strudwick
- Department of Biosciences, Durham University, Durham DH1 3LE, United Kingdom
- Biophysical Sciences Institute, Durham University, Durham DH1 3LE, United Kingdom
- North East England Stem Cell Institute (NESCI), Newcastle Upon Tyne NE1 4EP, United Kingdom
| | - Adina D. Mihai
- Department of Biosciences, Durham University, Durham DH1 3LE, United Kingdom
- Biophysical Sciences Institute, Durham University, Durham DH1 3LE, United Kingdom
- North East England Stem Cell Institute (NESCI), Newcastle Upon Tyne NE1 4EP, United Kingdom
| | - Jamie N. Watson
- Department of Biosciences, Durham University, Durham DH1 3LE, United Kingdom
- Biophysical Sciences Institute, Durham University, Durham DH1 3LE, United Kingdom
- North East England Stem Cell Institute (NESCI), Newcastle Upon Tyne NE1 4EP, United Kingdom
| | - Robina Dendooven
- Department of Biosciences, Durham University, Durham DH1 3LE, United Kingdom
- Biophysical Sciences Institute, Durham University, Durham DH1 3LE, United Kingdom
- North East England Stem Cell Institute (NESCI), Newcastle Upon Tyne NE1 4EP, United Kingdom
| | - Adrienne W. Paton
- Research Centre for Infectious Diseases, Department of Molecular and Biomedical Science, University of Adelaide, Adelaide, SA 5005, Australia
| | - James C. Paton
- Research Centre for Infectious Diseases, Department of Molecular and Biomedical Science, University of Adelaide, Adelaide, SA 5005, Australia
| | - Martin Schröder
- Department of Biosciences, Durham University, Durham DH1 3LE, United Kingdom
- Biophysical Sciences Institute, Durham University, Durham DH1 3LE, United Kingdom
- North East England Stem Cell Institute (NESCI), Newcastle Upon Tyne NE1 4EP, United Kingdom
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26
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Gaspar RC, Muñoz VR, Nakandakari SCBR, Vieira RFL, da Conceição LR, de Oliveira F, Crisol BM, da Silva AS, Cintra DE, de Moura LP, Ropelle ER, Zaghloul I, Mekary RA, Pauli JR. Aging is associated with increased TRB3, ER stress, and hepatic glucose production in the liver of rats. Exp Gerontol 2020; 139:111021. [DOI: 10.1016/j.exger.2020.111021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 06/03/2020] [Accepted: 07/08/2020] [Indexed: 12/17/2022]
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27
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Khoshnejat M, Kavousi K, Banaei-Moghaddam AM, Moosavi-Movahedi AA. Unraveling the molecular heterogeneity in type 2 diabetes: a potential subtype discovery followed by metabolic modeling. BMC Med Genomics 2020; 13:119. [PMID: 32831068 PMCID: PMC7444195 DOI: 10.1186/s12920-020-00767-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 08/12/2020] [Indexed: 11/22/2022] Open
Abstract
Background Type 2 diabetes mellitus (T2DM) is a complex multifactorial disease with a high prevalence worldwide. Insulin resistance and impaired insulin secretion are the two major abnormalities in the pathogenesis of T2DM. Skeletal muscle is responsible for over 75% of the glucose uptake and plays a critical role in T2DM. Here, we sought to provide a better understanding of the abnormalities in this tissue. Methods The muscle gene expression patterns were explored in healthy and newly diagnosed T2DM individuals using supervised and unsupervised classification approaches. Moreover, the potential of subtyping T2DM patients was evaluated based on the gene expression patterns. Results A machine-learning technique was applied to identify a set of genes whose expression patterns could discriminate diabetic subjects from healthy ones. A gene set comprising of 26 genes was found that was able to distinguish healthy from diabetic individuals with 94% accuracy. In addition, three distinct clusters of diabetic patients with different dysregulated genes and metabolic pathways were identified. Conclusions This study indicates that T2DM is triggered by different cellular/molecular mechanisms, and it can be categorized into different subtypes. Subtyping of T2DM patients in combination with their real clinical profiles will provide a better understanding of the abnormalities in each group and more effective therapeutic approaches in the future.
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Affiliation(s)
- Maryam Khoshnejat
- Laboratory of Complex Biological Systems and Bioinformatics (CBB), Department of Bioinformatics, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran.,The UNESCO Chair on Interdisciplinary Research in Diabetes, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | - Kaveh Kavousi
- Laboratory of Complex Biological Systems and Bioinformatics (CBB), Department of Bioinformatics, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran. .,The UNESCO Chair on Interdisciplinary Research in Diabetes, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran.
| | - Ali Mohammad Banaei-Moghaddam
- The UNESCO Chair on Interdisciplinary Research in Diabetes, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran.,Laboratory of Genomics and Epigenomics (LGE), Department of Biochemistry, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | - Ali Akbar Moosavi-Movahedi
- The UNESCO Chair on Interdisciplinary Research in Diabetes, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran.,Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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28
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Zou Y, Qi Z. Understanding the Role of Exercise in Nonalcoholic Fatty Liver Disease: ERS-Linked Molecular Pathways. Mediators Inflamm 2020; 2020:6412916. [PMID: 32774148 PMCID: PMC7397409 DOI: 10.1155/2020/6412916] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/11/2020] [Accepted: 06/23/2020] [Indexed: 12/14/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is globally prevalent and characterized by abnormal lipid accumulation in the liver, frequently accompanied by insulin resistance (IR), enhanced hepatic inflammation, and apoptosis. Recent studies showed that endoplasmic reticulum stress (ERS) at the subcellular level underlies these featured pathologies in the development of NAFLD. As an effective treatment, exercise significantly reduces hepatic lipid accumulation and thus alleviates NAFLD. Confusingly, these benefits of exercise are associated with increased or decreased ERS in the liver. Further, the interaction between diet, medication, exercise types, and intensity in ERS regulation is more confusing, though most studies have confirmed the benefits of exercise. In this review, we focus on understanding the role of exercise-modulated ERS in NAFLD and ERS-linked molecular pathways. Moderate ERS is an essential signaling for hepatic lipid homeostasis. Higher ERS may lead to increased inflammation and apoptosis in the liver, while lower ERS may lead to the accumulation of misfolded proteins. Therefore, exercise acts like an igniter or extinguisher to keep ERS at an appropriate level by turning it up or down, which depends on diet, medications, exercise intensity, etc. Exercise not only enhances hepatic tolerance to ERS but also prevents the malignant development of steatosis due to excessive ERS.
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Affiliation(s)
- Yong Zou
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention (Ministry of Education), East China Normal University, Shanghai 200241, China
- School of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Zhengtang Qi
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention (Ministry of Education), East China Normal University, Shanghai 200241, China
- School of Physical Education and Health, East China Normal University, Shanghai 200241, China
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29
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Marciniak C, Duhem C, Boulinguiez A, Raverdy V, Baud G, Verkindt H, Caiazzo R, Staels B, Duez H, Pattou F, Lancel S. Differential unfolded protein response in skeletal muscle from non-diabetic glucose tolerant or intolerant patients with obesity before and after bariatric surgery. Acta Diabetol 2020; 57:819-826. [PMID: 32086613 DOI: 10.1007/s00592-020-01490-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 01/21/2020] [Indexed: 01/08/2023]
Abstract
AIMS Not all people with obesity become glucose intolerant, suggesting differential activation of cellular pathways. The unfolded protein response (UPR) may contribute to the development of insulin resistance in several organs, but its role in skeletal muscle remains debated. Therefore, we explored the UPR activation in muscle from non-diabetic glucose tolerant or intolerant patients with obesity and the impact of bariatric procedures. METHODS Muscle biopsies from 22 normoglycemic (NG, blood glucose measured 120 min after an oral glucose tolerance test, G120 < 7.8 mM) and 22 glucose intolerant (GI, G120 between 7.8 and 11.1 mM) patients with obesity were used to measure UPR activation by RTqPCR and western blot. Then, UPR was studied in biopsies from 7 NG and 7 GI patients before and 1 year after bariatric surgery. RESULTS Binding immunoglobulin protein (BIP) protein was ~ 40% higher in the GI compared to NG subjects. Contrastingly, expression of the UPR-related genes BIP, activating transcription factor 6 (ATF6) and unspliced X-box binding protein 1 (XBP1u) were significantly lower and C/EBP homologous protein (CHOP) tended to decrease (p = 0.08) in GI individuals. While BIP protein positively correlated with fasting blood glucose (r = 0.38, p = 0.01), ATF6 and CHOP were associated with G120 (r = - 0.38 and r = - 0.41, p < 0.05) and the Matsuda index (r = 0.37 and r = 0.38, p < 0.05). Bariatric surgery improved metabolic parameters, associated with higher CHOP expression in GI patients, while ATF6 tended to increase (p = 0.08). CONCLUSIONS CHOP and ATF6 expression decreased in non-diabetic GI patients with obesity and was modified by bariatric surgery. These genes may contribute to glucose homeostasis in human skeletal muscle.
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Affiliation(s)
- Camille Marciniak
- Univ. Lille, Inserm, CHU Lille, U1190 - EGID, F-59000, Lille, France
| | - Christian Duhem
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011 - EGID, F-59000, Lille, France
| | - Alexis Boulinguiez
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011 - EGID, F-59000, Lille, France
| | - Violeta Raverdy
- Univ. Lille, Inserm, CHU Lille, U1190 - EGID, F-59000, Lille, France
| | - Gregory Baud
- Univ. Lille, Inserm, CHU Lille, U1190 - EGID, F-59000, Lille, France
| | - Hélène Verkindt
- Univ. Lille, Inserm, CHU Lille, U1190 - EGID, F-59000, Lille, France
| | - Robert Caiazzo
- Univ. Lille, Inserm, CHU Lille, U1190 - EGID, F-59000, Lille, France
| | - Bart Staels
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011 - EGID, F-59000, Lille, France
| | - Hélène Duez
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011 - EGID, F-59000, Lille, France
| | - François Pattou
- Univ. Lille, Inserm, CHU Lille, U1190 - EGID, F-59000, Lille, France
| | - Steve Lancel
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011 - EGID, F-59000, Lille, France.
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30
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Boncompagni S, Pozzer D, Viscomi C, Ferreiro A, Zito E. Physical and Functional Cross Talk Between Endo-Sarcoplasmic Reticulum and Mitochondria in Skeletal Muscle. Antioxid Redox Signal 2020; 32:873-883. [PMID: 31825235 DOI: 10.1089/ars.2019.7934] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Significance: The physiological relevance of contacts between the sarcoplasmic reticulum (SR), a specialized domain of the endoplasmic reticulum (ER) in skeletal muscle, and mitochondria is still not clear. Recent Advances: An extensive close proximity of these two organelles is a late developmental event, which suggests that it does not have an essential function. Critical Issues: The intimate association of SR/mitochondria develops during murine postnatal differentiation and the recovery of denervated atrophic muscle, which suggests that this is a highly regulated process with a specific function. Analyses of mouse models for muscle diseases suggest that impaired ER/SR-mitochondrial contacts may be due to ER stress and lead to defective bioenergetics and insulin signaling. Future Directions: Future studies are necessary to identify the molecular determinants weakening insulin signaling upon impairment of ER/mitochondrial contacts in skeletal muscles as well as to analyze the distance between SR/ER and mitochondria in muscle diseases associated with ER stress.
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Affiliation(s)
- Simona Boncompagni
- CeSI-Met-Center for Research on Ageing and Translational Medicine, University G. d' Annunzio, Chieti, Italy.,DNICS-Department of Neuroscience, Imaging and Clinical Sciences, University G. d' Annunzio, Chieti, Italy
| | - Diego Pozzer
- Istituto di Ricerche Farmacologiche Mario Negri-IRCCS, Milan, Italy
| | - Carlo Viscomi
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, United Kingdom
| | - Ana Ferreiro
- Unit of Functional and Adaptive Biology, BFA, Pathophysiology of Striated Muscles Laboratory, University Paris Diderot/CNRS, Sorbonne Paris Cité, Paris, France.,AP-HP, Centre de Référence Maladies Neuromusculaires Paris-Est, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Ester Zito
- Istituto di Ricerche Farmacologiche Mario Negri-IRCCS, Milan, Italy
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31
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D’Souza K, Mercer A, Mawhinney H, Pulinilkunnil T, Udenigwe CC, Kienesberger PC. Whey Peptides Stimulate Differentiation and Lipid Metabolism in Adipocytes and Ameliorate Lipotoxicity-Induced Insulin Resistance in Muscle Cells. Nutrients 2020; 12:nu12020425. [PMID: 32041341 PMCID: PMC7071342 DOI: 10.3390/nu12020425] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 01/30/2020] [Accepted: 02/01/2020] [Indexed: 12/13/2022] Open
Abstract
Deregulation of lipid metabolism and insulin function in muscle and adipose tissue are hallmarks of systemic insulin resistance, which can progress to type 2 diabetes. While previous studies suggested that milk proteins influence systemic glucose homeostasis and insulin function, it remains unclear whether bioactive peptides generated from whey alter lipid metabolism and its accumulation in muscle and adipose tissue. Therefore, we incubated murine 3T3-L1 preadipocytes and C2C12 myotubes with a whey peptide mixture produced through pepsin-pancreatin digestion, mimicking peptides generated in the gut from whey protein hydrolysis, and examined its effect on indicators of lipid metabolism and insulin sensitivity. Whey peptides, particularly those derived from bovine serum albumin (BSA), promoted 3T3-L1 adipocyte differentiation and triacylglycerol (TG) accumulation in accordance with peroxisome proliferator-activated receptor γ (PPARγ) upregulation. Whey/BSA peptides also increased lipolysis and mitochondrial fat oxidation in adipocytes, which was associated with the upregulation of peroxisome proliferator-activated receptor δ (PPARδ). In C2C12 myotubes, whey but not BSA peptides ameliorated palmitate-induced insulin resistance, which was associated with reduced inflammation and diacylglycerol accumulation, and increased sequestration of fatty acids in the TG pool. Taken together, our study suggests that whey peptides generated via pepsin-pancreatin digestion profoundly alter lipid metabolism and accumulation in adipocytes and skeletal myotubes.
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Affiliation(s)
- Kenneth D’Souza
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Dalhousie University, Dalhousie Medicine, Saint John, NB E2L 4L5 Canada (A.M.); (T.P.)
| | - Angella Mercer
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Dalhousie University, Dalhousie Medicine, Saint John, NB E2L 4L5 Canada (A.M.); (T.P.)
| | - Hannah Mawhinney
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada;
| | - Thomas Pulinilkunnil
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Dalhousie University, Dalhousie Medicine, Saint John, NB E2L 4L5 Canada (A.M.); (T.P.)
| | - Chibuike C. Udenigwe
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Petra C. Kienesberger
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Dalhousie University, Dalhousie Medicine, Saint John, NB E2L 4L5 Canada (A.M.); (T.P.)
- Correspondence: ; Tel.: +1-506-636-6971
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32
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Sarcoplasmic reticulum and calcium signaling in muscle cells: Homeostasis and disease. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2020; 350:197-264. [PMID: 32138900 DOI: 10.1016/bs.ircmb.2019.12.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The sarco/endoplasmic reticulum is an extensive, dynamic and heterogeneous membranous network that fulfills multiple homeostatic functions. Among them, it compartmentalizes, stores and releases calcium within the intracellular space. In the case of muscle cells, calcium released from the sarco/endoplasmic reticulum in the vicinity of the contractile machinery induces cell contraction. Furthermore, sarco/endoplasmic reticulum-derived calcium also regulates gene transcription in the nucleus, energy metabolism in mitochondria and cytosolic signaling pathways. These diverse and overlapping processes require a highly complex fine-tuning that the sarco/endoplasmic reticulum provides by means of its numerous tubules and cisternae, specialized domains and contacts with other organelles. The sarco/endoplasmic reticulum also possesses a rich calcium-handling machinery, functionally coupled to both contraction-inducing stimuli and the contractile apparatus. Such is the importance of the sarco/endoplasmic reticulum for muscle cell physiology, that alterations in its structure, function or its calcium-handling machinery are intimately associated with the development of cardiometabolic diseases. Cardiac hypertrophy, insulin resistance and arterial hypertension are age-related pathologies with a common mechanism at the muscle cell level: the accumulation of damaged proteins at the sarco/endoplasmic reticulum induces a stress response condition termed endoplasmic reticulum stress, which impairs proper organelle function, ultimately leading to pathogenesis.
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33
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Chan CB, Ahuja P, Ye K. Developing Insulin and BDNF Mimetics for Diabetes Therapy. Curr Top Med Chem 2019; 19:2188-2204. [PMID: 31660832 DOI: 10.2174/1568026619666191010160643] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/29/2019] [Accepted: 09/05/2019] [Indexed: 01/06/2023]
Abstract
Diabetes is a global public health concern nowadays. The majority of diabetes mellitus (DM) patients belong to type 2 diabetes mellitus (T2DM), which is highly associated with obesity. The general principle of current therapeutic strategies for patients with T2DM mainly focuses on restoring cellular insulin response by potentiating the insulin-induced signaling pathway. In late-stage T2DM, impaired insulin production requires the patients to receive insulin replacement therapy for maintaining their glucose homeostasis. T2DM patients also demonstrate a drop of brain-derived neurotrophic factor (BDNF) in their circulation, which suggests that replenishing BDNF or enhancing its downstream signaling pathway may be beneficial. Because of their protein nature, recombinant insulin or BDNF possess several limitations that hinder their clinical application in T2DM treatment. Thus, developing orally active "insulin pill" or "BDNF pill" is essential to provide a more convenient and effective therapy. This article reviews the current development of non-peptidyl chemicals that mimic insulin or BDNF and their potential as anti-diabetic agents.
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Affiliation(s)
- Chi Bun Chan
- School of Biological Sciences, The University of Hong Kong, Hong Kong
| | - Palak Ahuja
- School of Biological Sciences, The University of Hong Kong, Hong Kong
| | - Keqiang Ye
- Department of Pathology and Laboratory Medicine, Emory University of School of Medicine, Atlanta, GA, United States
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34
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Choi RH, McConahay A, Johnson MB, Jeong HW, Koh HJ. Adipose tissue-specific knockout of AMPKα1/α2 results in normal AICAR tolerance and glucose metabolism. Biochem Biophys Res Commun 2019; 519:633-638. [PMID: 31540695 DOI: 10.1016/j.bbrc.2019.09.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 09/12/2019] [Indexed: 12/25/2022]
Abstract
AMP-activated protein kinase (AMPK) is a member of Ser/Thr kinases that has been shown to regulate energy balance. Although recent studies have demonstrated the function of AMPK in adipose tissue using different fat-specific AMPK knockout mouse models, the results were somewhat inconsistent. For this study, we tested the hypothesis that AMPK in adipose tissue regulates whole body glucose metabolism. To determine the role of adipose tissue AMPK in vivo, we generated fat-specific AMPKα1/α2 knockout mice (AMPKFKO) using the Cre-loxP system. Body weights of AMPKFKO mice were not different between 8 and 27 weeks of age. Furthermore, tissue weights (liver, kidney, muscle, heart and white and brown adipose tissue) were similar to wild type littermates and DEXA scan analysis revealed no differences in percentages of body fat and lean mass. Knockout of AMPKα1/α2 in adipose tissue abolished basal and AICAR-stimulated phosphorylation of AMPK and Acetyl-CoA Carboxylase, a downstream of AMPK. Despite of the ablation of AICAR-stimulated AMPK phosphorylation, the blood glucose-lowering effect of AICAR injection (i.p.) was normal in AMPKFKO mice. In addition, AMPKFKO displayed normal fasting blood glucose concentration, glucose tolerance, insulin tolerance, and insulin signaling, indicating normal whole body glucose metabolism. These data demonstrate that adipose tissue AMPK plays a minimum role in whole body glucose metabolism on a chow diet.
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Affiliation(s)
- Ran Hee Choi
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, SC, 29208, USA
| | - Abigail McConahay
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, SC, 29208, USA
| | - Mackenzie B Johnson
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, SC, 29208, USA
| | - Ha-Won Jeong
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, SC, 29208, USA
| | - Ho-Jin Koh
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, SC, 29208, USA.
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35
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Hu F, Duan M, Peng N. Knockdown of TRB3 improved the MPP+/MPTP-induced Parkinson’s disease through the MAPK and AKT signaling pathways. Neurosci Lett 2019; 709:134352. [DOI: 10.1016/j.neulet.2019.134352] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/06/2019] [Accepted: 06/23/2019] [Indexed: 01/30/2023]
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de Souza Cordeiro LM, Mario ÉG, Moreira CCL, Rodrigues AH, Wanner SP, Soares DD, Botion LM, Ferreira AVM. Aerobic training induces differential expression of genes involved in lipid metabolism in skeletal muscle and white adipose tissues. J Cell Biochem 2019; 120:18883-18893. [PMID: 31219211 DOI: 10.1002/jcb.29208] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 05/22/2019] [Accepted: 05/28/2019] [Indexed: 12/25/2022]
Abstract
Aerobic training induces adaptive responses in skeletal muscles and white adipose tissues, thus facilitating lipid utilization as energy substrates during a physical exercise session. However, the effects of training on cytokines levels and on transcription factors involved in lipid metabolism in muscle and different white adipose depots are still unclear; therefore, these were the aims of the present study. Nineteen adult male Wistar rats were randomly assigned to a trained group or a control, non-trained group. The 10-week training protocol consisted of running on a treadmill, during 1 hour per day, 5 days per week, at 75% of maximum aerobic speed. As expected, trained rats improved their aerobic performance and had augmented citrate synthase activity in the soleus, while the control rats did not. Although body weight was not different between groups, the adiposity index and white adipose depots (ie, epididymal and retroperitoneal) were reduced in trained rats. Training reduced serum concentration of insulin, but failed to change serum concentrations of glucose, triacylglycerol, total cholesterol, and nonesterified fatty acids. Training increased sterol regulatory element-binding protein-1c expression in the gastrocnemius and epididymal adipose tissue, and reduced peroxisome proliferator-activated receptor γ (PPARγ) expression in most of the tissues analyzed. The expression of PPARα and carnitine palmitoyltransferase 1 increased in the gastrocnemius and mesenteric adipose tissue but reduced in epididymal adipose tissue. Triacylglycerol content and tribbles 3 expression reduced in the gastrocnemius of trained rats. Tumor necrosis factor-α and interleukin-6 were increased in all adipose depots evaluated. Collectively, our data indicate that the 10-week aerobic training changed gene expression to improve muscle oxidative metabolism and facilitate lipid degradation in adipose tissues. Our data also highlight the existence of adaptive responses that are distinct between the skeletal muscle and white adipose tissue and between different adipose depots.
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Affiliation(s)
- Letícia Maria de Souza Cordeiro
- Laboratory of Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.,Laboratory of Cellular Metabolism, Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Érica Guilhen Mario
- Laboratory of Cellular Metabolism, Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Carolina Campos Lima Moreira
- Laboratory of Cellular Metabolism, Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Angélica Heringer Rodrigues
- Laboratory of Cellular Metabolism, Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Samuel Penna Wanner
- Exercise Physiology Laboratory, Department of Physical Education, School of Physical Education, Physiotherapy and Occupational Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Danusa Dias Soares
- Exercise Physiology Laboratory, Department of Physical Education, School of Physical Education, Physiotherapy and Occupational Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Leida Maria Botion
- Laboratory of Cellular Metabolism, Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Adaliene Versiani Matos Ferreira
- Laboratory of Immunometabolism, Department of Nutrition, Nursing School, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Yeo YH, Lai YC. Redox Regulation of Metabolic Syndrome: Recent Developments in Skeletal Muscle Insulin Resistance and Non-alcoholic Fatty Liver Disease (NAFLD). CURRENT OPINION IN PHYSIOLOGY 2019; 9:79-86. [PMID: 32818162 DOI: 10.1016/j.cophys.2019.05.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Several new discoveries over the past decade have shown that metabolic syndrome, a cluster of metabolic disorders, including increased visceral obesity, hyperglycemia, hypertension, dyslipidemia and low HDL-cholesterol, is commonly associated with skeletal muscle insulin resistance. More recently, non-alcoholic fatty liver disease (NAFLD) was recognized as an additional condition that is strongly associated with features of metabolic syndrome. While the pathogenesis of skeletal muscle insulin resistance and fatty liver is multifactorial, the role of dysregulated redox signaling has been clearly demonstrated in the regulation of skeletal muscle insulin resistance and NAFLD. In this review, we aim to provide recent updates on redox regulation with respect to (a) pro-oxidant enzymes (e.g. NAPDH oxidase and xanthine oxidase); (b) mitochondrial dysfunction; (c) endoplasmic reticulum (ER) stress; (d) iron metabolism derangements; and (e) gut-skeletal muscle or gut-liver connection in the development of skeletal muscle insulin resistance and NAFLD. Furthermore, we discuss promising new therapeutic strategies targeting redox regulation currently under investigation for the treatment of skeletal muscle insulin resistance and NAFLD.
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Affiliation(s)
- Yee-Hui Yeo
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, California, USA
| | - Yen-Chun Lai
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University School of Medicine; Indianapolis, IN, USA
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Dutta P, Ma L, Ali Y, Sloot PMA, Zheng J. Boolean network modeling of β-cell apoptosis and insulin resistance in type 2 diabetes mellitus. BMC SYSTEMS BIOLOGY 2019; 13:36. [PMID: 30953496 PMCID: PMC6449890 DOI: 10.1186/s12918-019-0692-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Major alteration in lifestyle of human population has promoted Type 2 diabetes mellitus (T2DM) to the level of an epidemic. This metabolic disorder is characterized by insulin resistance and pancreatic β-cell dysfunction and apoptosis, triggered by endoplasmic reticulum (ER) stress, oxidative stress and cytokines. Computational modeling is necessary to consolidate information from various sources in order to obtain a comprehensive understanding of the pathogenesis of T2DM and to investigate possible interventions by performing in silico simulations. RESULTS In this paper, we propose a Boolean network model integrating the insulin resistance pathway with pancreatic β-cell apoptosis pathway which are responsible for T2DM. The model has five input signals, i.e. ER stress, oxidative stress, tumor necrosis factor α (TNF α), Fas ligand (FasL), and interleukin-6 (IL-6). We performed dynamical simulations using random order asynchronous update and with different combinations of the input signals. From the results, we observed that the proposed model made predictions that closely resemble the expression levels of genes in T2DM as reported in the literature. CONCLUSION The proposed model can make predictions about expression levels of genes in T2DM that are in concordance with literature. Although experimental validation of the model is beyond the scope of this study, the model can be useful for understanding the aetiology of T2DM and discovery of therapeutic intervention for this prevalent complex disease. The files of our model and results are available at https://github.com/JieZheng-ShanghaiTech/boolean-t2dm .
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Affiliation(s)
- Pritha Dutta
- Interdisciplinary Graduate School, Nanyang Technogical University, Singapore, Republic of Singapore
| | - Lichun Ma
- Biomedical Informatics Lab, School of Computer Science and Engineering, Nanyang Technological University, Singapore, Republic of Singapore
| | - Yusuf Ali
- Lee Kong Chian School of Medicine, Nanyang Technogical University, Singapore, Republic of Singapore
| | - Peter M A Sloot
- Complexity Institute, Nanyang Technogical University, Singapore, Republic of Singapore
| | - Jie Zheng
- School of Information Science and Technology, ShanghaiTech University, Shanghai, China.
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Choi RH, McConahay A, Silvestre JG, Moriscot AS, Carson JA, Koh HJ. TRB3 regulates skeletal muscle mass in food deprivation-induced atrophy. FASEB J 2019; 33:5654-5666. [PMID: 30681896 DOI: 10.1096/fj.201802145rr] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tribbles 3 (TRB3) is a pseudokinase that has been found in multiple tissues in response to various stress stimuli, such as nutrient deprivation and endoplasmic reticulum (ER) stress. We recently found that TRB3 has the potential to regulate skeletal muscle mass at the basal state. However, it has not yet been explored whether TRB3 regulates skeletal muscle mass under atrophic conditions. Here, we report that food deprivation for 48 h in mice significantly reduces muscle mass by ∼15% and increases TRB3 expression, which is associated with increased ER stress. Interestingly, inhibition of ER stress in C2C12 myotubes reduces food deprivation-induced expression of TRB3 and muscle-specific E3-ubiquitin ligases. In further in vivo experiments, muscle-specific TRB3 transgenic mice increase food deprivation-induced muscle atrophy compared with wild-type (WT) littermates presumably by the increased proteolysis. On the other hand, TRB3 knockout mice ameliorate food deprivation-induced atrophy compared with WT littermates by preserving a higher protein synthesis rate. These results indicate that TRB3 plays a pivotal role in skeletal muscle mass regulation under food deprivation-induced muscle atrophy and TRB3 could be a pharmaceutical target to prevent skeletal muscle atrophy.-Choi, R. H., McConahay, A., Silvestre, J. G., Moriscot, A. S., Carson, J. A., Koh, H.-J. TRB3 regulates skeletal muscle mass in food deprivation-induced atrophy.
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Affiliation(s)
- Ran Hee Choi
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
| | - Abigail McConahay
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
| | - João G Silvestre
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA.,Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Anselmo S Moriscot
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - James A Carson
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
| | - Ho-Jin Koh
- Division of Applied Physiology, Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
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40
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West DWD, Marcotte GR, Chason CM, Juo N, Baehr LM, Bodine SC, Baar K. Normal Ribosomal Biogenesis but Shortened Protein Synthetic Response to Acute Eccentric Resistance Exercise in Old Skeletal Muscle. Front Physiol 2019; 9:1915. [PMID: 30692935 PMCID: PMC6339931 DOI: 10.3389/fphys.2018.01915] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 12/18/2018] [Indexed: 01/06/2023] Open
Abstract
Anabolic resistance to feeding in aged muscle is well-characterized; however, whether old skeletal muscle is intrinsically resistant to acute mechanical loading is less clear. The aim of this study was to determine the impact of aging on muscle protein synthesis (MPS), ribosome biogenesis, and protein breakdown in skeletal muscle following a single bout of resistance exercise. Adult male F344/BN rats aged 10 (Adult) and 30 (Old) months underwent unilateral maximal eccentric contractions of the hindlimb. Precursor rRNA increased early post-exercise (6-18 h), preceding elevations in ribosomal mass at 48 h in Adult and Old; there were no age-related differences in these responses. MPS increased early post-exercise in both Adult and Old; however, at 48 h of recovery, MPS returned to baseline in Old but not Adult. This abbreviated protein synthesis response in Old was associated with decreased levels of IRS1 protein and increased BiP, CHOP and eIF2α levels. Other than these responses, anabolic signaling was similar in Adult and Old muscle in the acute recovery phase. Basal proteasome activity was lower in Old, and resistance exercise did not increase the activity of either the ATP-dependent or independent proteasome, or autophagy (Cathepsin L activity) in either Adult or Old muscle. We conclude that MPS and ribosome biogenesis in response to maximal resistance exercise in old skeletal muscle are initially intact; however, the MPS response is abbreviated in Old, which may be the result of ER stress and/or blunted exercise-induced potentiation of the MPS response to feeding.
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Affiliation(s)
- Daniel W D West
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA, United States
| | - George R Marcotte
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, Davis, CA, United States
| | - Courtney M Chason
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, Davis, CA, United States
| | - Natalie Juo
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, Davis, CA, United States
| | - Leslie M Baehr
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA, United States
| | - Sue C Bodine
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA, United States.,Department of Neurobiology, Physiology and Behavior, University of California, Davis, Davis, CA, United States.,VA Northern California Health Care System, Mather, CA, United States
| | - Keith Baar
- Department of Physiology and Membrane Biology, University of California, Davis, Davis, CA, United States.,Department of Neurobiology, Physiology and Behavior, University of California, Davis, Davis, CA, United States.,VA Northern California Health Care System, Mather, CA, United States
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41
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Afroze D, Kumar A. ER stress in skeletal muscle remodeling and myopathies. FEBS J 2019; 286:379-398. [PMID: 29239106 PMCID: PMC6002870 DOI: 10.1111/febs.14358] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 11/24/2017] [Accepted: 12/07/2017] [Indexed: 12/18/2022]
Abstract
Skeletal muscle is a highly plastic tissue in the human body that undergoes extensive adaptation in response to environmental cues, such as physical activity, metabolic perturbation, and disease conditions. The endoplasmic reticulum (ER) plays a pivotal role in protein folding and calcium homeostasis in many mammalian cell types, including skeletal muscle. However, overload of misfolded or unfolded proteins in the ER lumen cause stress, which results in the activation of a signaling network called the unfolded protein response (UPR). The UPR is initiated by three ER transmembrane sensors: protein kinase R-like endoplasmic reticulum kinase, inositol-requiring protein 1α, and activating transcription factor 6. The UPR restores ER homeostasis through modulating the rate of protein synthesis and augmenting the gene expression of many ER chaperones and regulatory proteins. However, chronic heightened ER stress can also lead to many pathological consequences including cell death. Accumulating evidence suggests that ER stress-induced UPR pathways play pivotal roles in the regulation of skeletal muscle mass and metabolic function in multiple conditions. They have also been found to be activated in skeletal muscle under catabolic states, degenerative muscle disorders, and various types of myopathies. In this article, we have discussed the recent advancements toward understanding the role and mechanisms through which ER stress and individual arms of the UPR regulate skeletal muscle physiology and pathology.
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Affiliation(s)
- Dil Afroze
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
- Department of Immunology and Molecular Medicine, Sher-I-Kashmir Institute of Medical Sciences, Soura, Srinagar, Kashmir, INDIA
| | - Ashok Kumar
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
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Villalobos-Labra R, Subiabre M, Toledo F, Pardo F, Sobrevia L. Endoplasmic reticulum stress and development of insulin resistance in adipose, skeletal, liver, and foetoplacental tissue in diabesity. Mol Aspects Med 2018; 66:49-61. [PMID: 30472165 DOI: 10.1016/j.mam.2018.11.001] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/27/2018] [Accepted: 11/21/2018] [Indexed: 02/06/2023]
Abstract
Diabesity is an abnormal metabolic condition shown by patients with obesity that develop type 2 diabetes mellitus. Patients with diabesity present with insulin resistance, reduced vascular response to insulin, and vascular endothelial dysfunction. Along with the several well-described mechanisms of insulin resistance, a state of endoplasmic reticulum (ER) stress, where the primary human targets are the adipose tissue, liver, skeletal muscle, and the foetoplacental vasculature, is apparent. ER stress characterises by the activation of the unfolded protein response via three canonical ER stress sensors, i.e., the protein kinase RNA-like endoplasmic reticulum kinase (PERK), inositol-requiring enzyme 1α (IRE1α), and activating transcription factor 6. Slightly different cell signalling mechanisms preferentially enable in diabesity in the ER stress-associated insulin resistance for adipose tissue (IRE1α/X-box binding protein 1 mRNA splicing/c-jun N-terminal kinase 1 activation), skeletal muscle (tribbles-like protein 3 (TRB3)/proinflammatory cytokines activation), and liver (PERK/activating transcription factor 4/TRB3 activation). There is no information in human subjects with diabesity in the foetoplacental vasculature. However, the available literature shows that pregnant women with pre-pregnancy obesity or overweight that develop gestational diabetes mellitus (GDM) and their newborn show insulin resistance. ER stress is recently reported to be triggered in endothelial cells from the human umbilical vein from mothers with pre-pregnancy obesity. However, whether a different metabolic alteration to obesity in pregnancy or GDM is present in women with pre-pregnancy obesity that develop GDM, is unknown. In this review, we summarised the findings on diabesity-associated mechanisms of insulin resistance with emphasis in the primary targets adipose, skeletal muscle, liver, and foetoplacental tissues. We also give evidence on the possibility of a new GDM-associated metabolic condition triggered in pregnancy by maternal obesity, i.e. gestational diabesity, leading to ER stress-associated insulin resistance in the human foetoplacental vasculature.
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Affiliation(s)
- Roberto Villalobos-Labra
- Cellular and Molecular Physiology Laboratory (CMPL), Department of Obstetrics, Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, 8330024, Chile.
| | - Mario Subiabre
- Cellular and Molecular Physiology Laboratory (CMPL), Department of Obstetrics, Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, 8330024, Chile
| | - Fernando Toledo
- Cellular and Molecular Physiology Laboratory (CMPL), Department of Obstetrics, Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, 8330024, Chile; Department of Basic Sciences, Faculty of Sciences, Universidad del Bío-Bío, Chillán, 3780000, Chile
| | - Fabián Pardo
- Cellular and Molecular Physiology Laboratory (CMPL), Department of Obstetrics, Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, 8330024, Chile; Metabolic Diseases Research Laboratory, Interdisciplinary Center of Territorial Health Research (CIISTe), San Felipe Campus, School of Medicine, Faculty of Medicine, Universidad de Valparaíso, 2172972, San Felipe, Chile
| | - Luis Sobrevia
- Cellular and Molecular Physiology Laboratory (CMPL), Department of Obstetrics, Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, 8330024, Chile; Department of Physiology, Faculty of Pharmacy, Universidad de Sevilla, Seville, E-41012, Spain; University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine and Biomedical Sciences, University of Queensland, Herston, QLD 4029, Queensland, Australia.
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Petersen MC, Shulman GI. Mechanisms of Insulin Action and Insulin Resistance. Physiol Rev 2018; 98:2133-2223. [PMID: 30067154 PMCID: PMC6170977 DOI: 10.1152/physrev.00063.2017] [Citation(s) in RCA: 1324] [Impact Index Per Article: 220.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 03/22/2018] [Accepted: 03/24/2018] [Indexed: 12/15/2022] Open
Abstract
The 1921 discovery of insulin was a Big Bang from which a vast and expanding universe of research into insulin action and resistance has issued. In the intervening century, some discoveries have matured, coalescing into solid and fertile ground for clinical application; others remain incompletely investigated and scientifically controversial. Here, we attempt to synthesize this work to guide further mechanistic investigation and to inform the development of novel therapies for type 2 diabetes (T2D). The rational development of such therapies necessitates detailed knowledge of one of the key pathophysiological processes involved in T2D: insulin resistance. Understanding insulin resistance, in turn, requires knowledge of normal insulin action. In this review, both the physiology of insulin action and the pathophysiology of insulin resistance are described, focusing on three key insulin target tissues: skeletal muscle, liver, and white adipose tissue. We aim to develop an integrated physiological perspective, placing the intricate signaling effectors that carry out the cell-autonomous response to insulin in the context of the tissue-specific functions that generate the coordinated organismal response. First, in section II, the effectors and effects of direct, cell-autonomous insulin action in muscle, liver, and white adipose tissue are reviewed, beginning at the insulin receptor and working downstream. Section III considers the critical and underappreciated role of tissue crosstalk in whole body insulin action, especially the essential interaction between adipose lipolysis and hepatic gluconeogenesis. The pathophysiology of insulin resistance is then described in section IV. Special attention is given to which signaling pathways and functions become insulin resistant in the setting of chronic overnutrition, and an alternative explanation for the phenomenon of ‟selective hepatic insulin resistanceˮ is presented. Sections V, VI, and VII critically examine the evidence for and against several putative mediators of insulin resistance. Section V reviews work linking the bioactive lipids diacylglycerol, ceramide, and acylcarnitine to insulin resistance; section VI considers the impact of nutrient stresses in the endoplasmic reticulum and mitochondria on insulin resistance; and section VII discusses non-cell autonomous factors proposed to induce insulin resistance, including inflammatory mediators, branched-chain amino acids, adipokines, and hepatokines. Finally, in section VIII, we propose an integrated model of insulin resistance that links these mediators to final common pathways of metabolite-driven gluconeogenesis and ectopic lipid accumulation.
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Affiliation(s)
- Max C Petersen
- Departments of Internal Medicine and Cellular & Molecular Physiology, Howard Hughes Medical Institute, Yale University School of Medicine , New Haven, Connecticut
| | - Gerald I Shulman
- Departments of Internal Medicine and Cellular & Molecular Physiology, Howard Hughes Medical Institute, Yale University School of Medicine , New Haven, Connecticut
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Oliva-Vilarnau N, Hankeova S, Vorrink SU, Mkrtchian S, Andersson ER, Lauschke VM. Calcium Signaling in Liver Injury and Regeneration. Front Med (Lausanne) 2018; 5:192. [PMID: 30023358 PMCID: PMC6039545 DOI: 10.3389/fmed.2018.00192] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/11/2018] [Indexed: 12/12/2022] Open
Abstract
The liver fulfills central roles in metabolic control and detoxification and, as such, is continuously exposed to a plethora of insults. Importantly, the liver has a unique ability to regenerate and can completely recoup from most acute, non-iterative insults. However, multiple conditions, including viral hepatitis, non-alcoholic fatty liver disease (NAFLD), long-term alcohol abuse and chronic use of certain medications, can cause persistent injury in which the regenerative capacity eventually becomes dysfunctional, resulting in hepatic scaring and cirrhosis. Calcium is a versatile secondary messenger that regulates multiple hepatic functions, including lipid and carbohydrate metabolism, as well as bile secretion and choleresis. Accordingly, dysregulation of calcium signaling is a hallmark of both acute and chronic liver diseases. In addition, recent research implicates calcium transients as essential components of liver regeneration. In this review, we provide a comprehensive overview of the role of calcium signaling in liver health and disease and discuss the importance of calcium in the orchestration of the ensuing regenerative response. Furthermore, we highlight similarities and differences in spatiotemporal calcium regulation between liver insults of different etiologies. Finally, we discuss intracellular calcium control as an emerging therapeutic target for liver injury and summarize recent clinical findings of calcium modulation for the treatment of ischemic-reperfusion injury, cholestasis and NAFLD.
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Affiliation(s)
- Nuria Oliva-Vilarnau
- Section of Pharmacogenetics, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Simona Hankeova
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden.,Faculty of Science, Institute of Experimental Biology, Masaryk University, Brno, Czechia
| | - Sabine U Vorrink
- Section of Pharmacogenetics, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Souren Mkrtchian
- Section of Pharmacogenetics, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Emma R Andersson
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden.,Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
| | - Volker M Lauschke
- Section of Pharmacogenetics, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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Behera S, Kapadia B, Kain V, Alamuru-Yellapragada NP, Murunikkara V, Kumar ST, Babu PP, Seshadri S, Shivarudraiah P, Hiriyan J, Gangula NR, Maddika S, Misra P, Parsa KV. ERK1/2 activated PHLPP1 induces skeletal muscle ER stress through the inhibition of a novel substrate AMPK. Biochim Biophys Acta Mol Basis Dis 2018; 1864:1702-1716. [DOI: 10.1016/j.bbadis.2018.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/29/2018] [Accepted: 02/22/2018] [Indexed: 11/28/2022]
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46
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Yoshino J, Almeda-Valdes P, Moseley AC, Mittendorfer B, Klein S. Percutaneous muscle biopsy-induced tissue injury causes local endoplasmic reticulum stress. Physiol Rep 2018; 6:e13679. [PMID: 29687616 PMCID: PMC5913661 DOI: 10.14814/phy2.13679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/14/2018] [Accepted: 03/15/2018] [Indexed: 01/12/2023] Open
Abstract
Endoplasmic reticulum (ER) stress is likely involved in the pathogenesis of metabolic dysfunction in people with obesity and diabetes. Although tissue biopsy is often used to evaluate the presence and severity of ER stress, it is not known whether acute tissue injury‐induced by percutaneous muscle biopsy causes ER stress and its potential downstream effects on markers of inflammation and metabolic function. In this study, we tested the hypothesis that percutaneous biopsy‐induced tissue injury causes ER stress and alters inflammatory and metabolic pathways in skeletal muscle. Vastus lateralis muscle tissue was obtained by percutaneous biopsy at 0600 h and 12 h later from either the contralateral leg (Group 1, n = 6) or at the same site as the initial biopsy (Group 2, n = 6) in women who were overweight. Muscle gene expression of selected markers of ER stress, inflammation, and regulators of glucose and lipid metabolism were determined. Compared with Group 1, muscle gene expression in the second biopsy sample obtained in Group 2 demonstrated marked increases in markers of ER stress (GRP78, XBP1, ATF6) and inflammation (IL6, TNF), and alterations in metabolic regulators (decreased expression of GLUT4 and PPARGC1A and increased expression of FASN). Our results suggest that acute tissue injury induced by percutaneous muscle biopsy causes an integrated local response that involves an induction of ER stress and alterations in markers of inflammation and regulators of glucose and lipid metabolism.
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Affiliation(s)
- Jun Yoshino
- Center for Human Nutrition, Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Paloma Almeda-Valdes
- Center for Human Nutrition, Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Anna C Moseley
- Center for Human Nutrition, Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Bettina Mittendorfer
- Center for Human Nutrition, Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
| | - Samuel Klein
- Center for Human Nutrition, Division of Geriatrics and Nutritional Science, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
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Montgomery MK, Mokhtar R, Bayliss J, Parkington HC, Suturin VM, Bruce CR, Watt MJ. Perilipin 5 Deletion Unmasks an Endoplasmic Reticulum Stress-Fibroblast Growth Factor 21 Axis in Skeletal Muscle. Diabetes 2018; 67:594-606. [PMID: 29378767 DOI: 10.2337/db17-0923] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 01/16/2018] [Indexed: 11/13/2022]
Abstract
Lipid droplets (LDs) are critical for the regulation of lipid metabolism, and dysregulated lipid metabolism contributes to the pathogenesis of several diseases, including type 2 diabetes. We generated mice with muscle-specific deletion of the LD-associated protein perilipin 5 (PLIN5, Plin5MKO ) and investigated PLIN5's role in regulating skeletal muscle lipid metabolism, intracellular signaling, and whole-body metabolic homeostasis. High-fat feeding induced changes in muscle lipid metabolism of Plin5MKO mice, which included increased fatty acid oxidation and oxidative stress but, surprisingly, a reduction in inflammation and endoplasmic reticulum (ER) stress. These muscle-specific effects were accompanied by whole-body glucose intolerance, adipose tissue insulin resistance, and reduced circulating insulin and C-peptide levels in Plin5MKO mice. This coincided with reduced secretion of fibroblast growth factor 21 (FGF21) from skeletal muscle and liver, resulting in reduced circulating FGF21. Intriguingly, muscle-secreted factors from Plin5MKO , but not wild-type mice, reduced hepatocyte FGF21 secretion. Exogenous correction of FGF21 levels restored glycemic control and insulin secretion in Plin5MKO mice. These results show that changes in lipid metabolism resulting from PLIN5 deletion reduce ER stress in muscle, decrease FGF21 production by muscle and liver, and impair glycemic control. Further, these studies highlight the importance for muscle-liver cross talk in metabolic regulation.
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Affiliation(s)
- Magdalene K Montgomery
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, and Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Ruzaidi Mokhtar
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, and Department of Physiology, Monash University, Clayton, Victoria, Australia
- Biotechnology Research Institute, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
| | - Jacqueline Bayliss
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, and Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Helena C Parkington
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, and Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Victor M Suturin
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, and Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Clinton R Bruce
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Victoria, Australia
| | - Matthew J Watt
- Metabolism, Diabetes and Obesity Program, Monash Biomedicine Discovery Institute, and Department of Physiology, Monash University, Clayton, Victoria, Australia
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48
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Gu J, Yan X, Dai X, Wang Y, Lin Q, Xiao J, Zhou S, Zhang J, Wang K, Zeng J, Xin Y, Barati MT, Zhang C, Bai Y, Li Y, Epstein PN, Wintergerst KA, Li X, Tan Y, Cai L. Metallothionein Preserves Akt2 Activity and Cardiac Function via Inhibiting TRB3 in Diabetic Hearts. Diabetes 2018; 67:507-517. [PMID: 29079702 PMCID: PMC5828458 DOI: 10.2337/db17-0219] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 10/20/2017] [Indexed: 12/17/2022]
Abstract
Cardiac insulin resistance is a key pathogenic factor for diabetic cardiomyopathy (DCM), but the mechanism remains largely unclear. We found that diabetic hearts exhibited decreased phosphorylation of total Akt and isoform Akt2 but not Akt1 in wild-type (WT) male FVB mice, which was accompanied by attenuation of Akt downstream glucose metabolic signal. All of these signal changes were not observed in metallothionein cardiac-specific transgenic (MT-TG) hearts. Furthermore, insulin-induced glucose metabolic signals were attenuated only in WT diabetic hearts. In addition, diabetic hearts exhibited increased Akt-negative regulator tribbles pseudokinase 3 (TRB3) expression only in WT mice, suggesting that MT may preserve Akt2 function via inhibiting TRB3. Moreover, MT prevented tert-butyl hydroperoxide (tBHP)-reduced insulin-stimulated Akt2 phosphorylation in MT-TG cardiomyocytes, which was abolished by specific silencing of Akt2. Specific silencing of TRB3 blocked tBHP inhibition of insulin-stimulated Akt2 phosphorylation in WT cardiomyocytes, whereas overexpression of TRB3 in MT-TG cardiomyocytes and hearts abolished MT preservation of insulin-stimulated Akt2 signals and MT prevention of DCM. Most importantly, supplementation of Zn to induce MT preserved cardiac Akt2 signals and prevented DCM. These results suggest that diabetes-inhibited cardiac Akt2 function via TRB3 upregulation leads to aberrant cardiac glucose metabolism. MT preservation of cardiac Akt2 function by inhibition of TRB3 prevents DCM.
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MESH Headings
- Animals
- Cell Cycle Proteins/antagonists & inhibitors
- Cell Cycle Proteins/genetics
- Cell Cycle Proteins/metabolism
- Cells, Cultured
- Diabetes Mellitus, Type 1/drug therapy
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/pathology
- Diabetes Mellitus, Type 1/physiopathology
- Heart/drug effects
- Heart/physiopathology
- Hypoglycemic Agents/pharmacology
- Hypoglycemic Agents/therapeutic use
- Insulin/pharmacology
- Insulin/therapeutic use
- Insulin Resistance
- Lipopolysaccharides/toxicity
- Male
- Metallothionein/genetics
- Metallothionein/metabolism
- Mice
- Mice, Mutant Strains
- Mice, Transgenic
- Myocardium/enzymology
- Myocardium/metabolism
- Myocardium/pathology
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Organ Specificity
- Oxidants/toxicity
- Oxidative Stress/drug effects
- Phosphorylation/drug effects
- Protein Processing, Post-Translational/drug effects
- Proto-Oncogene Proteins c-akt/antagonists & inhibitors
- Proto-Oncogene Proteins c-akt/genetics
- Proto-Oncogene Proteins c-akt/metabolism
- RNA Interference
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Affiliation(s)
- Junlian Gu
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Xiaoqing Yan
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Xiaozhen Dai
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- School of Biomedicine, Chengdu Medical College, Chengdu, Sichuan, China
| | - Yuehui Wang
- Departments of Geriatrics, Cardiovascular Disorders and Cardiac Surgery, The First Hospital of Jilin University, Changchun, China
| | - Qian Lin
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY
| | - Jian Xiao
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
| | - Shanshan Zhou
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Departments of Geriatrics, Cardiovascular Disorders and Cardiac Surgery, The First Hospital of Jilin University, Changchun, China
| | - Jian Zhang
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Departments of Geriatrics, Cardiovascular Disorders and Cardiac Surgery, The First Hospital of Jilin University, Changchun, China
| | - Kai Wang
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Jun Zeng
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Ying Xin
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Key Laboratory of Pathobiology, Ministry of Education, Jilin University, Changchun, China
| | | | - Chi Zhang
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
| | - Yang Bai
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Departments of Geriatrics, Cardiovascular Disorders and Cardiac Surgery, The First Hospital of Jilin University, Changchun, China
| | - Yan Li
- Department of Surgery, University of Louisville, Louisville, KY
| | - Paul N Epstein
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY
- Wendy L. Novak Diabetes Care Center, Louisville, KY
| | - Kupper A Wintergerst
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Wendy L. Novak Diabetes Care Center, Louisville, KY
- Division of Endocrinology, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Xiaokun Li
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
| | - Yi Tan
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY
- Wendy L. Novak Diabetes Care Center, Louisville, KY
| | - Lu Cai
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY
- Wendy L. Novak Diabetes Care Center, Louisville, KY
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49
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Örd T, Örd D, Örd T. TRIB3 limits FGF21 induction during in vitro and in vivo nutrient deficiencies by inhibiting C/EBP-ATF response elements in the Fgf21 promoter. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2018; 1861:271-281. [PMID: 29378327 DOI: 10.1016/j.bbagrm.2018.01.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 01/21/2018] [Accepted: 01/22/2018] [Indexed: 12/11/2022]
Abstract
Mammals must be able to endure periods of limited food availability, and the liver plays a central role in the adaptation to nutritional stresses. TRIB3 (Tribbles homolog 3) is a cellular stress-inducible gene with a liver-centric expression pattern and it has been implicated in stress response regulation and metabolic control. In the current article, we study the involvement of TRIB3 in responses to nutrient deficiencies, including fasting for up to 48 h in mice. We show that hepatic expression of Trib3 is increased after 48 h of fasting and mice with a targeted deletion of the Trib3 gene present elevated hepatic triglyceride content and liver weight at 48 h, along with an upregulation of lipid utilization genes in the liver. Further, hepatic and serum levels of the metabolic stress hormone FGF21 are considerably increased in 48-h-fasted Trib3 knockout mice compared to wild type. Trib3 deficiency also leads to elevated FGF21 levels in the mouse liver during essential amino acid deficiency and in cultured mouse embryonic fibroblasts during glucose starvation. Reporter assays reveal that TRIB3 regulates FGF21 by inhibiting ATF4-mediated, C/EBP-ATF site-dependent activation of Fgf21 transcription. Based on chromatin immunoprecipitation from mouse liver, the binding of TRIB3 and ATF4, a transcription factor known to physically interact with TRIB3, is significantly increased at the Fgf21 promoter following 48 h of fasting. Thus, under nutrient-limiting conditions that stimulate ATF4 activity, TRIB3 is implicated in the regulation of metabolic adaptation by restraining the transcription of Fgf21.
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Affiliation(s)
- Tiit Örd
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia
| | - Daima Örd
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia
| | - Tõnis Örd
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia.
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50
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Kumar N, Shaw P, Razzokov J, Yusupov M, Attri P, Uhm HS, Choi EH, Bogaerts A. Enhancement of cellular glucose uptake by reactive species: a promising approach for diabetes therapy. RSC Adv 2018; 8:9887-9894. [PMID: 35540836 PMCID: PMC9078705 DOI: 10.1039/c7ra13389h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Accepted: 03/03/2018] [Indexed: 12/16/2022] Open
Abstract
It is generally known that antidiabetic activity is associated with an increased level of glucose uptake in adipocytes and skeletal muscle cells. However, the role of exogenous reactive oxygen and nitrogen species (RONS) in muscle development and more importantly in glucose uptake is largely unknown. We investigate the effect of RONS generated by cold atmospheric plasma (CAP) in glucose uptake. We show that the glucose uptake is significantly enhanced in differentiated L6 skeletal muscle cells after CAP treatment. We also observe a significant increase of the intracellular Ca++ and ROS level, without causing toxicity. One of the possible reasons for an elevated level of glucose uptake as well as intracellular ROS and Ca++ ions is probably the increased oxidative stress leading to glucose transport. Influenence of biocompatible microsecond dielectric barrier discharge (μs-DBD) plasma in glucose uptake and cell differentiation.![]()
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Affiliation(s)
- Naresh Kumar
- Department of Chemistry
- University of Antwerp
- Belgium
| | | | | | | | - Pankaj Attri
- Department of Chemistry
- University of Antwerp
- Belgium
| | - Han Sup Uhm
- Plasma Bioscience Research Center/Department of Electrical and Biological Physics
- Kwangwoon University
- Seoul 139-701
- Korea
| | - Eun Ha Choi
- Plasma Bioscience Research Center/Department of Electrical and Biological Physics
- Kwangwoon University
- Seoul 139-701
- Korea
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