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Updated systematic review and meta-analysis on diagnostic issues and the prognostic impact of myosteatosis: A new paradigm beyond sarcopenia. Ageing Res Rev 2021; 70:101398. [PMID: 34214642 DOI: 10.1016/j.arr.2021.101398] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 05/22/2021] [Accepted: 06/28/2021] [Indexed: 02/07/2023]
Abstract
Myosteatosis, which is excessive fat infiltration in the skeletal muscle, is now considered a distinct disease from sarcopenia. Advances in imaging technique have made muscle parameters an evaluable biomarker, and many studies have proved association between myosteatosis and aging or disease process. However, the diagnosis and clinical impact of myosteatosis have not been well established. Thus, we aim to provide a systematic summary with a qualitive review of 73 eligible studies regarding these issues. First, the most widely used modality to diagnose myosteatosis is abdominal computed tomography, based on evaluation of the muscle radiodensity of the total abdominal muscle area predominantly at the L3 vertebral level. However, there was significant heterogeneity in the diagnostic methods and cutoff values used to diagnose myosteatosis (32 different cutoff values among 73 studies). Second, the clinical impact of myosteatosis on prognosis was very straightforward, and most studies have shown a negative impact of myosteatosis on overall survival and complications related to underlying diseases. However, the mechanism of the myosteatosis on mortality has not been explored well, and metabolic dysfunction (i.e. insulin resistance, systemic inflammation) would be a possible explanation. Providing systemic review of current issues can elucidate future directions for developing standardized diagnosis and management of myosteatosis.
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Li Y, Tang Y, Shi S, Gao S, Wang Y, Xiao D, Chen T, He Q, Zhang J, Lin Y. Tetrahedral Framework Nucleic Acids Ameliorate Insulin Resistance in Type 2 Diabetes Mellitus via the PI3K/Akt Pathway. ACS APPLIED MATERIALS & INTERFACES 2021; 13:40354-40364. [PMID: 34410099 DOI: 10.1021/acsami.1c11468] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Insulin resistance (IR) is one of the essential conditions in the development of type 2 diabetes mellitus (T2DM). IR occurs in hepatic cells when the insulin receptor substrate-1 (IRS-1)/phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway is downregulated; thus, activating this pathway can significantly improve insulin sensitivity and ameliorate T2DM. Tetrahedral framework nucleic acids (tFNAs), a DNA nanomaterial, are synthesized from four single-stranded DNA molecules. tFNAs possess excellent biocompatibility and good water solubility and stability. tFNAs can promote cell proliferation, cell autophagy, wound healing, and nerve regeneration by activating the PI3K/Akt pathway. Herein, we explore the effects and underlying mechanisms of tFNAs on IR. The results displayed that tFNAs could increase glucose uptake and ameliorate IR by activating the IRS-1/PI3K/Akt pathway in glucosamine (GlcN)-stimulated HepG2 cells. By employing a PI3K inhibitor, we confirmed that tFNAs reduce IR through the PI3K/Akt pathway. Moreover, tFNAs can promote hepatic cell proliferation and inhibit GlcN-induced cell apoptosis. In a T2DM mouse model, tFNAs reduce blood glucose levels and ameliorate hepatic IR via the PI3K/Akt pathway. Taken together, tFNAs can improve hepatic IR and alleviate T2DM through the PI3K/Akt pathway, making contribution to the potential application of tFNAs in T2DM.
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Affiliation(s)
- Yanjing Li
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P. R. China
- Department of Prosthodontics, Tianjin Medical University School of Stomatology, Tianjin 300070, P. R. China
| | - Yuanlin Tang
- West China Medical Center, Sichuan University, Chengdu 610041, P. R. China
| | - Sirong Shi
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P. R. China
| | - Shaojingya Gao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P. R. China
| | - Yun Wang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P. R. China
| | - Dexuan Xiao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P. R. China
| | - Tianyu Chen
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P. R. China
| | - Qing He
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, P. R. China
| | - Junjiang Zhang
- Department of Prosthodontics, Tianjin Medical University School of Stomatology, Tianjin 300070, P. R. China
| | - Yunfeng Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, P. R. China
- West China Medical Center, Sichuan University, Chengdu 610041, P. R. China
- College of Biomedical Engineering, Sichuan University, Chengdu 610041, P. R. China
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53
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Tashiro E, Nagasawa Y, Itoh S, Imoto M. Involvement of miR-3180-3p and miR-4632-5p in palmitic acid-induced insulin resistance. Mol Cell Endocrinol 2021; 534:111371. [PMID: 34157350 DOI: 10.1016/j.mce.2021.111371] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 05/25/2021] [Accepted: 06/17/2021] [Indexed: 01/17/2023]
Abstract
Insulin resistance is defined as a failure to trigger the activation of the PI3K-AKT pathway by normal levels of insulin; therefore, it is well linked to metabolic disorders. Although multiple mechanisms contribute to insulin resistance, one major cause is elevated concentrations of plasma free fatty acids, which are known to suppress insulin signaling. However, the underlying mechanism is still elusive. Here, we found that palmitic acid increased the expression of two miRNAs, miR-3180-3p and miR-4632-5p, in HepG2 cells. Transfection of HepG2 cells with miR-3180-3p or miR-4632-5p reduced insulin-induced activation of the PI3K-AKT pathway. Moreover, palmitic acid or two miRNAs inhibited insulin-induced phosphorylation of Tyr612 on IRS-1 without affecting insulin receptor activation. Therefore, two miRNAs are suggested to be involved in palmitic acid-induced insulin resistance through suppression of insulin-induced IRS-1 phosphorylation. Identification of miR-3180-3p and miR-4632-5p targets could provide valuable information for the development of therapeutic drugs for type 2 diabetes.
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Affiliation(s)
- Etsu Tashiro
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Yokohama, Japan; Laboratory of Biochemistry, Showa Pharmaceutical University, Tokyo, Japan.
| | - Yumi Nagasawa
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Yokohama, Japan
| | - Susumu Itoh
- Laboratory of Biochemistry, Showa Pharmaceutical University, Tokyo, Japan
| | - Masaya Imoto
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Yokohama, Japan; Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
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54
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Won G, Choi SI, Kang CH, Kim GH. Lactiplantibacillus plantarum MG4296 and Lacticaseibacillus paracasei MG5012 Ameliorates Insulin Resistance in Palmitic Acid-Induced HepG2 Cells and High Fat Diet-Induced Mice. Microorganisms 2021; 9:1139. [PMID: 34070604 PMCID: PMC8228052 DOI: 10.3390/microorganisms9061139] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/21/2021] [Accepted: 05/21/2021] [Indexed: 12/30/2022] Open
Abstract
The purpose of this study was to evaluate the capacity of Lactiplantibacillus plantarum MG4296 (MG4296) and Lacticaseibacillus paracasei MG5012 (MG5012) on insulin resistance (IR) and diabetes-related metabolic changes in palmitic acid (PA)-induced HepG2 cells and high-fat diet-induced mice. In vitro, cell-free extracts of MG4296 and MG5012 alleviated IR by increasing glucose uptake and glycogen content in PA-induced insulin-resistant HepG2 cells. In vivo, MG4296 and MG5012 supplementation markedly decreased body weight and glucose tolerance. Administration of both strains also improved serum glucose, glycated hemoglobin, insulin, triglyceride, LDL/HDL ratio, and homeostatic model assessment of IR (HOMA-IR). Histopathological analysis of liver tissue demonstrated a significant reduction in lipid accumulation and glycogen content. Moreover, MG4296 and MG5012 treatment enhanced phosphoinositide-3 kinase (PI3K)/protein kinase B (Akt) expression in the liver. Overall, MG4296 and MG5012 could prevent HFD-induced glucose tolerance and hyperglycemia by improving IR. Therefore, L. plantarum MG4296 and L. paracasei MG5012 could be useful as new probiotics candidates to improve T2DM.
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Affiliation(s)
- Gayeong Won
- Department of Health Functional New Materials, Duksung Women’s University, Seoul 01369, Korea;
| | - Soo-Im Choi
- Department of Health Functional New Materials, Duksung Women’s University, Seoul 01369, Korea;
| | | | - Gun-Hee Kim
- Department of Food and Nutrition, Duksung Women’s University, Seoul 01369, Korea
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55
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Ding L, De Munck TJI, Oligschlaeger Y, dos Reis IM, Verbeek J, Koek GH, Houben T, Shiri-Sverdlov R. Myosteatosis in NAFLD patients correlates with plasma Cathepsin D. Biomol Concepts 2021; 12:27-35. [DOI: 10.1515/bmc-2021-0004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 04/23/2021] [Indexed: 12/31/2022] Open
Abstract
Abstract
Previously, we have shown that hepatic lipid accumulation induces the secretion of cathepsin D (CTSD), and that plasma CTSD levels are associated with increased inflammation and disease severity in nonalcoholic fatty liver disease (NAFLD). Although it is clear that the liver is a major source of plasma CTSD, it is unknown whether other metabolically active organs such as the muscle, also associate with plasma CTSD levels in NAFLD patients. Therefore, the aim of this study was to explore the relation between lipid accumulation in the muscle (myosteatosis) and plasma CTSD levels in forty-five NAFLD patients. We observed that hepatic steatosis positively associated with plasma CTSD levels, confirming the previously established link between plasma CTSD and the liver. Furthermore, a positive association between myosteatosis and plasma CTSD levels was observed, which was independent of sex, age, BMI, waist circumference and hepatic steatosis. By establishing a positive association between myosteatosis and plasma CTSD levels, our findings suggest that, in addition to the liver, the muscle is also linked to plasma CTSD levels in NAFLD patients. The observed link between myosteatosis and plasma CTSD levels supports the concept of a significant role of the skeletal muscle in metabolic disturbances in metabolic syndrome-related disorders.
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Affiliation(s)
- Lingling Ding
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism , Maastricht University Medical Center+ , Universiteitssingel 50 , Maastricht , the Netherlands
| | - Toon. J. I. De Munck
- Department of Internal Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism , Maastricht University Medical Center+ , Universiteitssingel 50 , Maastricht , the Netherlands
| | - Yvonne Oligschlaeger
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism , Maastricht University Medical Center+ , Universiteitssingel 50 , Maastricht , the Netherlands
| | - Inês Magro dos Reis
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism , Maastricht University Medical Center+ , Universiteitssingel 50 , Maastricht , the Netherlands
| | - Jef Verbeek
- Department of Gastroenterology & Hepatology , University Hospitals KU Leuven , Herestraat 49 , Leuven Leuven , Belgium
| | - Ger. H. Koek
- Department of Internal Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism , Maastricht University Medical Center+ , Universiteitssingel 50 , Maastricht , the Netherlands
- Department of internal medicine, division of gastroenterology and hepatology , Maastricht University Medical Center . P. Debyelaan 25 , HX Maastricht , the Netherlands
| | - Tom Houben
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism , Maastricht University Medical Center+ , Universiteitssingel 50 , Maastricht , the Netherlands
| | - Ronit Shiri-Sverdlov
- Department of Molecular Genetics, NUTRIM School of Nutrition and Translational Research in Metabolism , Maastricht University Medical Center+ , Universiteitssingel 50 , Maastricht , the Netherlands
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56
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de Souza Galia WB, Biazi GR, Frasson-Uemura IG, Miksza DR, Zaia CTBV, Zaia DAM, de Souza HM, Bertolini GL. Gluconeogenesis is reduced from alanine, lactate and pyruvate, but maintained from glycerol, in liver perfusion of rats with early and late sepsis. Cell Biochem Funct 2021; 39:754-762. [PMID: 33913177 DOI: 10.1002/cbf.3637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 04/12/2021] [Indexed: 11/09/2022]
Abstract
Sepsis induces several metabolic abnormalities, including hypoglycaemia in the most advanced stage of the disease, a risk factor for complications and death. Although hypoglycaemia can be caused by inhibition of hepatic gluconeogenesis, decreased and increased gluconeogenesis were reported in sepsis. Furthermore, gluconeogenesis from glycerol was not yet evaluated in this disease. The main purpose of this study was to investigate the gluconeogenesis from alanine, lactate, pyruvate and glycerol in rats with early (8 hours) and late (18 hours) sepsis. Parameters related to the characterization of sepsis were also evaluated. Sepsis was induced by cecal ligation and puncture and gluconeogenesis was assessed in liver perfusion. Rats with early and late sepsis showed increased lactataemia, depletion of liver glycogen and peripheral insulin resistance, characterizing the establishment of sepsis. Rats with early and late sepsis showed decreased gluconeogenesis from alanine, lactate and pyruvate. Interestingly, gluconeogenesis from glycerol, a precursor that enters in the pathway at a later step, subsequent to the entry of alanine, lactate and pyruvate, was maintained in rats with early and late sepsis. In conclusion, gluconeogenesis is decreased from alanine, lactate and pyruvate, but maintained from glycerol, in liver perfusion of rats with early and late sepsis. SIGNIFICANCE OF THE STUDY: The maintenance of gluconeogenesis from glycerol, but not from alanine, lactate and pyruvate, together with the liver glycogen depletion, points the glycerol as an important precursor for the maintenance of glycaemic homeostasis in sepsis. The findings open the possibility of further investigation on the administration of glycerol in the treatment of hypoglycaemia associated with more advanced sepsis.
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Affiliation(s)
| | - Giuliana Regina Biazi
- Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | | | - Daniele Romani Miksza
- Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
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57
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Park SJ, Kwon W, Park S, Jeong J, Kim D, Jang S, Kim SY, Sung Y, Kim MO, Choi SK, Ryoo ZY. Jazf1 acts as a regulator of insulin-producing β-cell differentiation in induced pluripotent stem cells and glucose homeostasis in mice. FEBS J 2021; 288:4412-4427. [PMID: 33555104 DOI: 10.1111/febs.15751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 12/02/2020] [Accepted: 02/04/2021] [Indexed: 12/13/2022]
Abstract
Genetic susceptibility of type 2 diabetes and Juxtaposed with another zinc finger protein 1 (Jazf1) has been reported; however, the precise role of Jazf1 in metabolic processes remains elusive. In this study, using Jazf1-knockout (KO)-induced pluripotent stem cells (iPSC), pancreatic beta cell line MIN6 cells, and Jazf-1 heterozygous KO (Jazf1+/- ) mice, the effect of Jazf1 on gradual differentiation was investigated. We checked the alterations of the genes related with β-cell specification, maturation, and insulin release against glucose treatment by the gain and loss of the Jazf1 gene in the MIN6 cells. Because undifferentiated Jazf1-KO iPSC were not significantly different from wild-type (WT) iPSC, the size and endoderm marker expression after embryoid body (EB) and teratoma formation were investigated. Compared to EB and teratomas formed with WT iPSC, the EB and teratomas from with Jazf1-KO iPSC were smaller, and in teratomas, the expression of proliferation markers was reduced. Moreover, the expression of the gene sets for β-cell differentiation and the levels of insulin and C-peptide secreted by insulin precursor cells were notably reduced in β-cells differentiated from Jazf1-KO iPSC compared with those differentiated from WT iPSC. A comparison of Jazf1+/- and WT mice showed that Jazf1+/- mice had lower levels of serum insulin, pancreatic insulin expression, and decreased pancreatic β-cell size, which resulted in defects in the glucose homeostasis. These findings suggest that Jazf1 plays a pivotal role in the differentiation of β-cells and glucose homeostasis.
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Affiliation(s)
- Si Jun Park
- School of Life Science, BK21 plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea.,Institute of Life Science and Biotechnology, Kyungpook National University, Daegu, Korea
| | - Wookbong Kwon
- School of Life Science, BK21 plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea.,Division of Biotechnology, DGIST, Daegu, Korea
| | - Song Park
- Core Protein Resources Center, DGIST, Daegu, Korea.,Department of Brain and Cognitive Sciences, DGIST, Daegu, Korea
| | - Jain Jeong
- Core Protein Resources Center, DGIST, Daegu, Korea.,Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Dongjun Kim
- School of Life Science, BK21 plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
| | - Soyoung Jang
- School of Life Science, BK21 plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
| | - Si-Yong Kim
- School of Life Science, BK21 plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
| | - Yonghun Sung
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Korea
| | - Myoung Ok Kim
- Department of Animal Science and Biotechnology, Kyungpook National University, Sangju, Korea
| | - Seong-Kyoon Choi
- Division of Biotechnology, DGIST, Daegu, Korea.,Core Protein Resources Center, DGIST, Daegu, Korea
| | - Zae Young Ryoo
- School of Life Science, BK21 plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
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58
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Graneri LT, Mamo JCL, D’Alonzo Z, Lam V, Takechi R. Chronic Intake of Energy Drinks and Their Sugar Free Substitution Similarly Promotes Metabolic Syndrome. Nutrients 2021; 13:nu13041202. [PMID: 33917297 PMCID: PMC8067378 DOI: 10.3390/nu13041202] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/27/2021] [Accepted: 03/31/2021] [Indexed: 12/12/2022] Open
Abstract
Energy drinks containing significant quantities of caffeine, taurine and sugar are increasingly consumed, particularly by adolescents and young adults. The putative effects of chronic ingestion of either standard energy drink, MotherTM (ED), or its sugar-free formulation (sfED) on metabolic syndrome were determined in wild-type C57BL/6J mice, in comparison to a soft drink, Coca-Cola (SD), a Western-styled diet enriched in saturated fatty acids (SFA), and a combination of SFA + ED. Following 13 weeks of intervention, mice treated with ED were hyperglycaemic and hypertriglyceridaemic, indicating higher triglyceride glucose index, which was similar to the mice maintained on SD. Surprisingly, the mice maintained on sfED also showed signs of insulin resistance with hyperglycaemia, hypertriglyceridaemia, and greater triglyceride glucose index, comparable to the ED group mice. In addition, the ED mice had greater adiposity primarily due to the increase in white adipose tissue, although the body weight was comparable to the control mice receiving only water. The mice maintained on SFA diet exhibited significantly greater weight gain, body fat, cholesterol and insulin, whilst blood glucose and triglyceride concentrations remained comparable to the control mice. Collectively, these data suggest that the consumption of both standard and sugar-free forms of energy drinks induces metabolic syndrome, particularly insulin resistance.
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Affiliation(s)
- Liam T. Graneri
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6845, Australia; (L.T.G.); (J.C.L.M.); (Z.D.); (V.L.)
- Curtin Medical School, Faculty of Health Sciences, Curtin University, Perth, WA 6845, Australia
| | - John C. L. Mamo
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6845, Australia; (L.T.G.); (J.C.L.M.); (Z.D.); (V.L.)
- School of Population Health, Faculty of Health Sciences, Curtin University, Perth, WA 6845, Australia
| | - Zachary D’Alonzo
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6845, Australia; (L.T.G.); (J.C.L.M.); (Z.D.); (V.L.)
- Curtin Medical School, Faculty of Health Sciences, Curtin University, Perth, WA 6845, Australia
| | - Virginie Lam
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6845, Australia; (L.T.G.); (J.C.L.M.); (Z.D.); (V.L.)
- School of Population Health, Faculty of Health Sciences, Curtin University, Perth, WA 6845, Australia
| | - Ryusuke Takechi
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6845, Australia; (L.T.G.); (J.C.L.M.); (Z.D.); (V.L.)
- School of Population Health, Faculty of Health Sciences, Curtin University, Perth, WA 6845, Australia
- Correspondence: ; Tel.: +61-8-92662607
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59
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Nakitto AMS, Muyonga JH, Byaruhanga YB, Wagner AE. Solanum anguivi Lam. Fruits: Their Potential Effects on Type 2 Diabetes Mellitus. Molecules 2021; 26:2044. [PMID: 33918509 PMCID: PMC8038283 DOI: 10.3390/molecules26072044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/25/2021] [Accepted: 03/29/2021] [Indexed: 12/27/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is a complex metabolic disorder of glucose homeostasis associated with a status of insulin resistance, impaired insulin signaling, β-cell dysfunction, impaired glucose and lipid metabolism, sub-clinical inflammation, and increased oxidative stress. Consuming fruits and vegetables rich in phytochemicals with potential antidiabetic effects may prevent T2DM and/or support a conservative T2DM treatment while being safer and more affordable for people from low-income countries. Solanum anguivi Lam. fruits (SALF) have been suggested to exhibit antidiabetic properties, potentially due to the presence of various phytochemicals, including saponins, phenolics, alkaloids, ascorbic acid, and flavonoids. For the saponin fraction, antidiabetic effects have already been reported. However, it remains unclear whether this is also true for the other phytochemicals present in SALF. This review article covers information on glucose homeostasis, T2DM pathogenesis, and also the potential antidiabetic effects of phytochemicals present in SALF, including their potential mechanisms of action.
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Affiliation(s)
- Aisha Musaazi Sebunya Nakitto
- Department of Food Technology and Nutrition, School of Food Technology Nutrition and Bioengineering, College of Agricultural and Environmental Sciences, Makerere University, P.O. Box 7062 Kampala, Uganda or (A.M.S.N.); (J.H.M.); (Y.B.B.)
- Institute of Nutritional Sciences, Justus-Liebig University, Wilhelmstrasse 20, 35392 Giessen, Germany
| | - John H. Muyonga
- Department of Food Technology and Nutrition, School of Food Technology Nutrition and Bioengineering, College of Agricultural and Environmental Sciences, Makerere University, P.O. Box 7062 Kampala, Uganda or (A.M.S.N.); (J.H.M.); (Y.B.B.)
| | - Yusuf Byenkya Byaruhanga
- Department of Food Technology and Nutrition, School of Food Technology Nutrition and Bioengineering, College of Agricultural and Environmental Sciences, Makerere University, P.O. Box 7062 Kampala, Uganda or (A.M.S.N.); (J.H.M.); (Y.B.B.)
| | - Anika E. Wagner
- Institute of Nutritional Sciences, Justus-Liebig University, Wilhelmstrasse 20, 35392 Giessen, Germany
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60
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Parikh HM, Elgzyri T, Alibegovic A, Hiscock N, Ekström O, Eriksson KF, Vaag A, Groop LC, Ström K, Hansson O. Relationship between insulin sensitivity and gene expression in human skeletal muscle. BMC Endocr Disord 2021; 21:32. [PMID: 33639916 PMCID: PMC7912896 DOI: 10.1186/s12902-021-00687-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 02/03/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Insulin resistance (IR) in skeletal muscle is a key feature of the pre-diabetic state, hypertension, dyslipidemia, cardiovascular diseases and also predicts type 2 diabetes. However, the underlying molecular mechanisms are still poorly understood. METHODS To explore these mechanisms, we related global skeletal muscle gene expression profiling of 38 non-diabetic men to a surrogate measure of insulin sensitivity, i.e. homeostatic model assessment of insulin resistance (HOMA-IR). RESULTS We identified 70 genes positively and 110 genes inversely correlated with insulin sensitivity in human skeletal muscle, identifying autophagy-related genes as positively correlated with insulin sensitivity. Replication in an independent study of 9 non-diabetic men resulted in 10 overlapping genes that strongly correlated with insulin sensitivity, including SIRT2, involved in lipid metabolism, and FBXW5 that regulates mammalian target-of-rapamycin (mTOR) and autophagy. The expressions of SIRT2 and FBXW5 were also positively correlated with the expression of key genes promoting the phenotype of an insulin sensitive myocyte e.g. PPARGC1A. CONCLUSIONS The muscle expression of 180 genes were correlated with insulin sensitivity. These data suggest that activation of genes involved in lipid metabolism, e.g. SIRT2, and genes regulating autophagy and mTOR signaling, e.g. FBXW5, are associated with increased insulin sensitivity in human skeletal muscle, reflecting a highly flexible nutrient sensing.
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Affiliation(s)
- Hemang M Parikh
- Health Informatics Institute, Morsani College of Medicine, University of South Florida, 3650 Spectrum Blvd, Tampa, FL, 33612, USA.
- Department of Clinical Sciences, Diabetes & Endocrinology, Lund University, University Hospital Malmö, SE-20502, Malmö, Sweden.
| | - Targ Elgzyri
- Department of Clinical Sciences, Diabetes & Endocrinology, Lund University, University Hospital Malmö, SE-20502, Malmö, Sweden
| | | | - Natalie Hiscock
- Unilever Discover R & D, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - Ola Ekström
- Department of Clinical Sciences, Diabetes & Endocrinology, Lund University, University Hospital Malmö, SE-20502, Malmö, Sweden
| | - Karl-Fredrik Eriksson
- Department of Clinical Sciences, Diabetes & Endocrinology, Lund University, University Hospital Malmö, SE-20502, Malmö, Sweden
| | - Allan Vaag
- Steno Diabetes Center, DK-2820, Gentofte, Denmark
| | - Leif C Groop
- Department of Clinical Sciences, Diabetes & Endocrinology, Lund University, University Hospital Malmö, SE-20502, Malmö, Sweden
- Finnish Institute of Molecular Medicine, FI-00014, University of Helsinki, Helsinki, Finland
| | - Kristoffer Ström
- Department of Clinical Sciences, Diabetes & Endocrinology, Lund University, University Hospital Malmö, SE-20502, Malmö, Sweden
- Swedish Winter Sports Research Centre, Mid Sweden University, SE-83125, Östersund, Sweden
| | - Ola Hansson
- Department of Clinical Sciences, Diabetes & Endocrinology, Lund University, University Hospital Malmö, SE-20502, Malmö, Sweden
- Finnish Institute of Molecular Medicine, FI-00014, University of Helsinki, Helsinki, Finland
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Wang L, Guo Y, Pan M, Li X, Huang D, Liu Y, Wu C, Zhang W, Mai K. Functions of Forkhead Box O on Glucose Metabolism in Abalone Haliotis discus hannai and Its Responses to High Levels of Dietary Lipid. Genes (Basel) 2021; 12:genes12020297. [PMID: 33672704 PMCID: PMC7924355 DOI: 10.3390/genes12020297] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 02/05/2021] [Accepted: 02/17/2021] [Indexed: 12/23/2022] Open
Abstract
The forkhead box O (FoxO) subfamily is a member of the forkhead transcription factor family. It has regulation functions in glucose metabolism in mammals and fish. In the present study, a gene of the foxo homolog in abalone Haliotis discus hannai was cloned. A conservative forkhead (FH) domain and a transactivation (FoxO-TAD) domain were identified. Abalone foxo-specific siRNA (small interfering RNA) was injected to investigate the functions of foxo on glucose metabolism. Knockdown of foxo inhibited expression of phosphoenolpyruvate carboxykinase (pepck) and significantly increased expressions of hexokinase (hk) and pyruvate kinase (pk), but it failed to inhibit the relative mRNA level of glucose-6-phosphatase (g6pase). Then, a 100-day feeding trial was conducted to investigate the response of foxo and glucose metabolism in abalone fed with 1.57% (LFD, low-fat diet), 3.82% (MFD, middle-fat diet) and 6.72% (HFD, high-fat diet) of dietary lipid, respectively. The insulin-signaling pathway (AKT) was depressed and FoxO was activated by the HFD, but it did not inhibit glycolysis (hk) or improved gluconeogenesis significantly (pepck and g6pase). At the same time, impaired hepatopancreas glycogen storage raised hemolymph glucose levels. In conclusion, abalone foxo can be regulated by dietary lipid and can regulate gluconeogenesis or glycolysis in response to changes of dietary lipid levels, in which glycogen metabolism plays an important role.
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Affiliation(s)
- Liu Wang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China; (L.W.); (Y.G.); (M.P.); (X.L.); (D.H.); (Y.L.); (K.M.)
| | - Yanlin Guo
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China; (L.W.); (Y.G.); (M.P.); (X.L.); (D.H.); (Y.L.); (K.M.)
| | - Mingzhu Pan
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China; (L.W.); (Y.G.); (M.P.); (X.L.); (D.H.); (Y.L.); (K.M.)
| | - Xinxin Li
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China; (L.W.); (Y.G.); (M.P.); (X.L.); (D.H.); (Y.L.); (K.M.)
| | - Dong Huang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China; (L.W.); (Y.G.); (M.P.); (X.L.); (D.H.); (Y.L.); (K.M.)
| | - Yue Liu
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China; (L.W.); (Y.G.); (M.P.); (X.L.); (D.H.); (Y.L.); (K.M.)
| | - Chenglong Wu
- School of Life Science, Huzhou University, 759 East 2nd Road, Huzhou 313000, China
- Correspondence: (C.W.); (W.Z.); Tel.: +86-532-8203-2145 (W.Z.)
| | - Wenbing Zhang
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China; (L.W.); (Y.G.); (M.P.); (X.L.); (D.H.); (Y.L.); (K.M.)
- Correspondence: (C.W.); (W.Z.); Tel.: +86-532-8203-2145 (W.Z.)
| | - Kangsen Mai
- The Key Laboratory of Aquaculture Nutrition and Feeds (Ministry of Agriculture and Rural Affairs), the Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao 266003, China; (L.W.); (Y.G.); (M.P.); (X.L.); (D.H.); (Y.L.); (K.M.)
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Wang Y, Zhang T, Liu R, Chang M, Wei W, Jin Q, Wang X. New perspective toward nutritional support for malnourished cancer patients: Role of lipids. Compr Rev Food Sci Food Saf 2021; 20:1381-1421. [PMID: 33533186 DOI: 10.1111/1541-4337.12706] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 12/01/2020] [Accepted: 12/28/2020] [Indexed: 12/13/2022]
Abstract
To improve the difficulties related to malnutrition, nutritional support has become an essential part of multidisciplinary comprehensive treatment for cancer. Lipids are essential nutrient source for the human body, and nowadays in clinical practices, it has a positive interventional effect on patients suffering from cancer. However, contribution of lipids in nutritional support of cancer patients is still poorly understood. Moreover, the sensory and physicochemical properties of lipids can severely restrict their applications in lipid-rich formula foods. In this review article, for the first time, we have presented a summary of the existing studies which were related to the associations between different lipids and improved malnutrition in cancer patients and discussed possible mechanisms. Subsequently, we discussed the challenges and effective solutions during processing of lipids into formula foods. Further, by considering existing problems in current lipid nutritional support, we proposed a novel method for the treatment of malnutrition, including developing individualized lipid nutrition for different patients depending on the individual's genotype and enterotype. Nonetheless, this review study provides a new direction for future research on nutritional support and the development of lipid-rich formula foods for cancer patients, and probably will help to improve the efficacy of lipids in the treatment of cancer malnutrition.
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Affiliation(s)
- Yandan Wang
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Tao Zhang
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Ruijie Liu
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Ming Chang
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Wei Wei
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Qingzhe Jin
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Xingguo Wang
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
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63
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Abdollahi S, Kazemi A, de Souza RJ, Clark CCT, Soltani S. The effect of meal frequency on biochemical cardiometabolic factors: A systematic review and meta-analysis of randomized controlled trials. Clin Nutr 2021; 40:3170-3181. [PMID: 33485709 DOI: 10.1016/j.clnu.2020.12.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 12/16/2020] [Accepted: 12/25/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND Although several randomized controlled trials (RCTs) have supported the beneficial effects of higher meal frequency (MF) on cardiometabolic risk factors, the putative effects of higher MF on health remain inconclusive. This study systematically reviewed the evidence from RCTs of the effect of higher compared with lower MF on the blood lipid profile, glucose homeostasis, and adipokines. METHODS PubMed, Scopus, ISI Web of Science, and the Cochrane database were searched up to October 2020 to retrieve relevant RCTs. A DerSimonian and Laird random effects model was used to pool mean differences and 95% CI for each outcome. The quality of studies and evidence was assessed through standard methods. RESULTS Twenty-one RCTs (686 participants) were included in this meta-analysis. Overall results showed a significant improvement in total cholesterol [weighted mean difference (WMD) = -6.08 mg/dl; 95% CI: -10.68, -1.48; P = 0.01; I2 = 88%], and low-density cholesterol (LDL-C) (WMD = -6.82 mg/dl; 95% CI: -10.97, -1.60; P = 0.009; I2 = 85.7%), while LDL-C to high-density cholesterol ratio (LDL-C: HDL-C) increased (WMD = 0.22; 95% CI: 0.07, 0.36; P = 0.003; I2 = 0.0%) in higher MF vs. lower MF. No significant effects were found on measures of glycemic control, apolipoproteins-A1 and B, or leptin. In subgroup analyses, higher MF significantly reduced serum triglyceride (TG), and increased HDL-C, compared with lower MF in interventions > 12 weeks, and decreased serum TC and LDL-C in healthy participants. A significant reduction in LDL-C also was observed in studies where the same foods given both arms, simply divided into different feeding occasions, and in feeding studies, following higher MF compared to lower MF. CONCLUSION Our meta-analysis found that higher, compared with lower MF may improve total cholesterol, and LDL-C. The intervention does not affect measures of glycemic control, apolipoproteins-A1 and B, or leptin. However, the GRADE ratings of low credibility of the currently available evidence highlights the need for more high-quality studies in order to reach a firm conclusion.
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Affiliation(s)
- Shima Abdollahi
- Department of Nutrition and Public Health, School of Public Health, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Asma Kazemi
- Nutrition Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Russell J de Souza
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada; Population Health Research Centre, Hamilton Health Sciences Corporation, Hamilton, ON, Canada
| | - Cain C T Clark
- Centre for Intelligent Healthcare, Coventry University, Coventry, CV1 5FB, UK
| | - Sepideh Soltani
- Yazd Cardiovascular Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
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Pant R, Firmal P, Shah VK, Alam A, Chattopadhyay S. Epigenetic Regulation of Adipogenesis in Development of Metabolic Syndrome. Front Cell Dev Biol 2021; 8:619888. [PMID: 33511131 PMCID: PMC7835429 DOI: 10.3389/fcell.2020.619888] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/14/2020] [Indexed: 12/12/2022] Open
Abstract
Obesity is one of the biggest public health concerns identified by an increase in adipose tissue mass as a result of adipocyte hypertrophy and hyperplasia. Pertaining to the importance of adipose tissue in various biological processes, any alteration in its function results in impaired metabolic health. In this review, we discuss how adipose tissue maintains the metabolic health through secretion of various adipokines and inflammatory mediators and how its dysfunction leads to the development of severe metabolic disorders and influences cancer progression. Impairment in the adipocyte function occurs due to individuals' genetics and/or environmental factor(s) that largely affect the epigenetic profile leading to altered gene expression and onset of obesity in adults. Moreover, several crucial aspects of adipose biology, including the regulation of different transcription factors, are controlled by epigenetic events. Therefore, understanding the intricacies of adipogenesis is crucial for recognizing its relevance in underlying disease conditions and identifying the therapeutic interventions for obesity and metabolic syndrome.
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Affiliation(s)
- Richa Pant
- National Centre for Cell Science, SP Pune University Campus, Pune, India
| | - Priyanka Firmal
- National Centre for Cell Science, SP Pune University Campus, Pune, India
| | - Vibhuti Kumar Shah
- National Centre for Cell Science, SP Pune University Campus, Pune, India
| | - Aftab Alam
- Roswell Park Comprehensive Cancer Center, Buffalo, NY, United States
| | - Samit Chattopadhyay
- National Centre for Cell Science, SP Pune University Campus, Pune, India.,Department of Biological Sciences, BITS Pilani, Goa, India
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Shahwan M, Hassan N, Shaheen RA, Gaili A, Jairoun AA, Shahwan M, Najjar O, Jamshed S. Diabetes Mellitus and Renal Function: Current Medical Research and Opinion. Curr Diabetes Rev 2021; 17:e011121190176. [PMID: 33430750 DOI: 10.2174/1573399817999210111205532] [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: 07/25/2020] [Revised: 11/04/2020] [Accepted: 11/05/2020] [Indexed: 11/22/2022]
Abstract
Diabetes mellitus (DM), which is defined as high blood glucose level, is a major public health issue worldwide. An enormous amount of data has been gathered regarding DM as populations have been living with it for more than a decade; however, continually updating our knowledge of DM remains important. Comorbidities are among the major challenges associated with DM. Poorly controlled DM, especially type 2 DM (T2DM), is considered a risk factor for many diseases, including but not limited to chronic kidney disease (CKD). Complications might appear over time as the aging process changes body functions; moreover, a significant number of antidiabetic medications are eventually cleared by the kidneys, thereby increasing the burden on kidney function and placing diabetic patients at risk. The significantly high number of patients with uncontrolled diabetes resulting from kidney disease shows the impact of this condition on the quality of life of patients. This review presents an overview of the pathophysiology, etiology, and prevalence of CKD and abnormal renal parameters correlated with poorly controlled T2DM, with an emphasis on clinical studies involving the association between vitamin D insufficiency/deficiency and CKD among patients with T2DM.
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Affiliation(s)
- Moyad Shahwan
- Department of Clinical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, United Arab Emirates
| | - Nageeb Hassan
- Department of Clinical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, United Arab Emirates
| | - Rima Ahd Shaheen
- Department of Clinical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, United Arab Emirates
| | - Ahmed Gaili
- Department of Clinical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, United Arab Emirates
| | | | - Monzer Shahwan
- Diabetes Clinic, Al-Swity Center for Dermatology and Chronic Diseases, Palestinian Territory, Occupied
| | - Osama Najjar
- General Directorate of Allied Health Professions, Ministry of Health, Palestinian Territory, Occupied
| | - Shazia Jamshed
- Department of Clinical Pharmacy and Practice, Faculty of Pharmacy, Universiti Sultan Zainal Abidin (UniSZA) Besut Campus, Kuala terraenganu, Malaysia
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66
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Kim H, Kang JH, Jung DI, Kang BT, Chang D, Yang MP. A preliminary evaluation of the circulating leptin/adiponectin ratio in dogs with pituitary-dependent hyperadrenocorticism and concurrent diabetes mellitus. Domest Anim Endocrinol 2021; 74:106506. [PMID: 32920447 DOI: 10.1016/j.domaniend.2020.106506] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 05/26/2020] [Accepted: 06/01/2020] [Indexed: 12/24/2022]
Abstract
Leptin and adiponectin are thought to modulate insulin sensitivity and pancreatic β-cell function, but there is limited information regarding the adipokine status of hyperglycemic dogs with hyperadrenocorticism. This study aimed to determine whether alterations in the leptin/adiponectin ratio, insulin sensitivity, and/or pancreatic β-cell function are associated with diabetes mellitus (DM) in dogs with pituitary-dependent hyperadrenocorticism (PDH). A total of 48 client-owned dogs were included in this prospective observational study: 20 dogs with PDH (10 normoglycemic and 10 with DM), 15 dogs with DM, and 13 healthy dogs. The serum concentrations of leptin, adiponectin, resistin, interleukin (IL)-1β, IL-6, IL-10, IL-18, and tumor necrosis factor (TNF)-α were measured, and homeostatic model assessment indices (HOMAs) were calculated and compared among the groups. Serum leptin was significantly higher in PDH dogs with and without DM than in healthy and DM dogs, and it was lower in DM dogs than in PDH dogs without DM. Serum adiponectin was significantly lower in PDH dogs with DM than in healthy and PDH dogs, and it was significantly lower in DM dogs than in healthy dogs. Serum IL-10 was significantly higher in PDH dogs with DM than in healthy and PDH dogs without DM. The leptin/adiponectin ratio was significantly higher in PDH dogs with DM than in normoglycemic PDH dogs. Serum IL-6 concentrations were significantly higher in DM dogs than in healthy dogs. Serum IL-1β concentration was significantly higher in DM dogs than in healthy dogs and PDH dogs with DM and without DM. Serum TNF-α and IL-18 concentrations were not different among groups. The HOMAβ-cell function was significantly lower in PDH dogs with DM than in normoglycemic PDH dogs, while HOMAinsulin sensitivity was significantly lower in PDH dogs with DM than in healthy dogs. These results suggest that adipokine dysregulation, a reduction in insulin sensitivity, and a further impairment in pancreatic β-cell function might predispose PDH dogs to DM. Further longitudinal study will be necessary to confirm this result.
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Affiliation(s)
- H Kim
- Veterinary Teaching Hospital and College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - J-H Kang
- Veterinary Teaching Hospital and College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea.
| | - D-I Jung
- Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - B-T Kang
- Veterinary Teaching Hospital and College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - D Chang
- Veterinary Teaching Hospital and College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - M-P Yang
- Veterinary Teaching Hospital and College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
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Zhu Y, Zhang H, Wei Y, Cai M, Gu R, Wang Y, Ma Y, Chen L. Pea-derived peptides, VLP, LLP, VA, and LL, improve insulin resistance in HepG2 cells via activating IRS-1/PI3K/AKT and blocking ROS-mediated p38MAPK signaling. J Food Biochem 2020; 44:e13454. [PMID: 32875583 DOI: 10.1111/jfbc.13454] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 08/03/2020] [Accepted: 08/06/2020] [Indexed: 12/19/2022]
Abstract
This study evaluated the effect of four peptides, VLP, LLP, LL, and LL from pea on regulating glucose metabolism and antioxidant through IRS-1/PI3K/AKT and p38MAPK signal pathway in IR-HepG2 cell induced by 10-6 M insulin. The genes expression of PEPCK, G6Pase, GLUT2, and IRS-1 and proteins of IRS-1, p(Ser307)-IRS-1, AKT, p(Ser473)-AKT, p38MAPK, and p-p38MAPK were determined by RT-PCR and western blotting, respectively. Results show that they displayed highly potent on stimulation glucose metabolism and relief oxidative stress in IR-HepG2 cells. VLP, LLP, VA, and LL reduced Ser307 phosphorylation of IRS-1 and promoted Ser473 phosphorylation of AKT. Among them, LLP, VA, and LL increased the expression both gene and protein of GLUT2, and VLP and LL reduced p38MAPK phosphorylation showing strong antioxidant capacity. Therefore, pea oligopeptides have considerable potential for reversing the metabolic abnormalities associated with type 2 diabetes. PRACTICAL APPLICATIONS: This paper examined the intervention effect of VLP, LLP, VA, and LL that from pea on insulin resistance, and the mechanisms were detected by western blotting. The results provide a theoretical knowledge for the prevention of insulin resistance in T2D of pea-derived peptides and lay the foundation for the development of functional products and drugs in the future.
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Affiliation(s)
- Yan Zhu
- Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, P.R. China
| | - Haixin Zhang
- Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, P.R. China
| | - Ying Wei
- Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, P.R. China
| | - Muyi Cai
- Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, P.R. China
| | - Ruizeng Gu
- Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, P.R. China
| | - Yuchen Wang
- Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, P.R. China
| | - Yong Ma
- Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, P.R. China
| | - Liang Chen
- Engineering Research Center of Protein & Functional Peptides, China National Research Institute of Food and Fermentation Industries, Beijing, P.R. China
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Huang D, Lo YM, Chang W, Lin C, Chen J, Wu JS, Huang W, Shen S. Alleviative effect of Ruellia tuberosa L. on NAFLD and hepatic lipid accumulation via modulating hepatic de novo lipogenesis in high-fat diet plus streptozotocin-induced diabetic rats. Food Sci Nutr 2020; 8:5710-5716. [PMID: 33133572 PMCID: PMC7590278 DOI: 10.1002/fsn3.1868] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/12/2020] [Accepted: 08/15/2020] [Indexed: 12/15/2022] Open
Abstract
Ruellia tuberosa L. (RTL) exhibits phytochemical activities and has been used as a folk medicine for curing diabetes mellitus in East Asia for decades. This study investigated the effect of RTL aqueous and ethanolic extracts on nonalcoholic fatty liver disease (NAFLD) and hepatic lipid accumulation in high-fat diet (HFD) and streptozotocin (STZ)-induced type 2 diabetes mellitus (T2DM) rats. Administration of RTL aqueous extract (RTLW) or ethanolic extract (RTLE) at dosage of 100 or 400 mg/kg body weight for 4 weeks was carried out in HFD/STZ-induced T2DM rats. Liver weight, adipose (epididymal and perirenal adipose tissues) weight, hepatic triglyceride level, and de novo lipogenesis (DNL)-associated protein expression were monitored after scarification. The results revealed that RTLW and RTLE reduced relative liver weight and relative fat weights in HFD/STZ-induced T2DM rats. RTLW and RTLE also ameliorated NAFLD and hepatic triglyceride (TG) accumulation in diabetic rats. Moreover, hepatic DNL-regulated enzymes such as sterol regulatory element-binding protein-1 (SREBP1) and fatty acid synthase (FAS) expression were significantly suppressed by RTLE (100 and 400 mg/kg body weight) in diabetic rats. The evidences of this study suggest that RTL possesses potential on alleviating NAFLD and lipid accumulation via regulating DNL in the liver of HFD/STZ-induced T2DM rats.
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Affiliation(s)
- Da‐Wei Huang
- Department of Biotechnology and Food TechnologySouthern Taiwan University of Science and TechnologyTainan CityTaiwan
| | | | - Wen‐Chang Chang
- Department of Food ScienceNational Chiayi UniversityChiayi CityTaiwan
| | - Chia‐Yu Lin
- Graduate Program of Nutrition ScienceNational Taiwan Normal UniversityTaipeiTaiwan
| | - Jou‐An Chen
- Graduate Program of Nutrition ScienceNational Taiwan Normal UniversityTaipeiTaiwan
| | - James Swi‐Bea Wu
- Graduate Institute of Food Science and TechnologyNational Taiwan UniversityTaipeiTaiwan
| | - Wen‐Chung Huang
- Graduate Institute of Health Industry TechnologyChang Gung University of Science and TechnologyTaoyuanTaiwan
| | - Szu‐Chuan Shen
- Graduate Program of Nutrition ScienceNational Taiwan Normal UniversityTaipeiTaiwan
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Sampath C, Srinivasan S, Freeman ML, Gangula PR. Inhibition of GSK-3β restores delayed gastric emptying in obesity-induced diabetic female mice. Am J Physiol Gastrointest Liver Physiol 2020; 319:G481-G493. [PMID: 32812777 PMCID: PMC7654647 DOI: 10.1152/ajpgi.00227.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Diabetic gastroparesis (DG) is a clinical syndrome characterized by delayed gastric emptying (DGE). Loss of nuclear factor erythroid 2-related factor 2 (Nrf2) is associated with reduced neuronal nitric oxide synthase-α (nNOSα)-mediated gastric motility and DGE. Previous studies have shown that nuclear exclusion and inactivation of Nrf2 is partly regulated by glycogen synthase kinase 3β (GSK-3β). In the current study, the molecular signaling of GSK-3β-mediated Nrf2 activation and its mechanistic role on DG were investigated in high-fat diet (HFD)-induced obese/Type 2 diabetes (T2D) female mice. Adult female C57BL/6J mice were fed with HFD or normal diet (ND) with or without GSK-3β inhibitor (SB 216763, 10 mg/kg body wt ip) start from the 14th wk and continued feeding mice for an additional 3-wk time period. Our results show that treatment with GSK-3β inhibitor SB attenuated DGE in obese/T2D mice. Treatment with SB restored impaired gastric 1) Nrf2 and phase II antioxidant enzymes through PI3K/ERK/AKT-mediated pathway, 2) tetrahydrobiopterin (BH4, cofactor of nNOS) biosynthesis enzyme dihydrofolate reductase, and 3) nNOSα dimerization in obese/T2 diabetic female mice. SB treatment normalized caspase 3 activity and downstream GSK-3β signaling in the gastric tissues of the obese/T2 diabetic female mice. In addition, GSK-3β inhibitor restored impaired nitrergic relaxation in hyperglycemic conditions. Finally, SB treatment reduced GSK3 marker, pTau in adult primary enteric neuronal cells. These findings emphasize the importance of GSK-3β on regulating gastric Nrf2 and nitrergic mediated gastric emptying in obese/diabetic rodents.NEW & NOTEWORTHY Inhibition of glycogen synthase kinase 3β (GSK-3β) with SB 216763 attenuates delayed gastric emptying through gastric nuclear factor erythroid 2-related factor 2 (Nrf2)-phase II enzymes in high-fat diet-fed female mice. SB 216763 restored impaired gastric PI3K/AKT/ β-catenin/caspase 3 expression. Inhibition of GSK-3β normalized gastric dihydrofolate reductase, neuronal nitric oxide synthase-α expression, dimerization and nitrergic relaxation. SB 216763 normalized both serum estrogen and nitrate levels in female obese/Type 2 diabetes mice. SB 216763 reduced downstream signaling of GSK-3β in enteric neuronal cells in vitro.
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Affiliation(s)
- Chethan Sampath
- 1Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, Tennessee
| | - Shanthi Srinivasan
- 2Division of Digestive Diseases, Department of Medicine, Emory University, Atlanta, Georgia and Atlanta Veterans Affairs Health Care System, Decatur, Atlanta, Georgia
| | - Michael L. Freeman
- 3Department of Radiation Oncology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Pandu R. Gangula
- 1Department of Oral Diagnostic Sciences and Research, School of Dentistry, Meharry Medical College, Nashville, Tennessee
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The Molecular Mechanisms by Which Vitamin D Prevents Insulin Resistance and Associated Disorders. Int J Mol Sci 2020; 21:ijms21186644. [PMID: 32932777 PMCID: PMC7554927 DOI: 10.3390/ijms21186644] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 09/07/2020] [Accepted: 09/09/2020] [Indexed: 02/06/2023] Open
Abstract
Numerous studies have shown that vitamin D deficiency is very common in modern societies and is perceived as an important risk factor in the development of insulin resistance and related diseases such as obesity and type 2 diabetes (T2DM). While it is generally accepted that vitamin D is a regulator of bone homeostasis, its ability to counteract insulin resistance is subject to debate. The goal of this communication is to review the molecular mechanism by which vitamin D reduces insulin resistance and related complications. The university library, PUBMED, and Google Scholar were searched to find relevant studies to be summarized in this review article. Insulin resistance is accompanied by chronic hyperglycaemia and inflammation. Recent studies have shown that vitamin D exhibits indirect antioxidative properties and participates in the maintenance of normal resting ROS level. Appealingly, vitamin D reduces inflammation and regulates Ca2+ level in many cell types. Therefore, the beneficial actions of vitamin D include diminished insulin resistance which is observed as an improvement of glucose and lipid metabolism in insulin-sensitive tissues.
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71
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LNK deficiency decreases obesity-induced insulin resistance by regulating GLUT4 through the PI3K-Akt-AS160 pathway in adipose tissue. Aging (Albany NY) 2020; 12:17150-17166. [PMID: 32911464 PMCID: PMC7521507 DOI: 10.18632/aging.103658] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/22/2020] [Indexed: 01/24/2023]
Abstract
In recent years, LNK, an adapter protein, has been found to be associated with metabolic diseases, including hypertension and diabetes. We found that the expression of LNK in human adipose tissue was positively correlated with serum glucose and insulin in obese people. We examined the role of LNK in insulin resistance and systemic energy metabolism using LNK-deficient mice (LNK-/-). With consumption of a high-fat diet, wild type (WT) mice accumulated more intrahepatic triglyceride, higher serum triglyceride (TG), free fatty acid (FFA) and high sensitivity C-reactive protein (hsCRP) compared with LNK-/- mice. However, there was no significant difference between LNK-/- and WT mice under normal chow diet. Meanwhile, glucose transporter 4 (GLUT4) expression in adipose tissue and insulin-stimulated glucose uptake in adipocytes were increased in LNK-/- mice. LNK-/- adipose tissue showed activated reactivity for IRS1/PI3K/Akt/AS160 signaling, and administration of a PI3K inhibitor impaired glucose uptake. In conclusion, LNK plays a pivotal role in adipose glucose transport by regulating insulin-mediated IRS1/PI3K/Akt/AS160 signaling.
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Chen D, Jia D, Wu X, Shi K, Ren C, Dou Y, Guo M, Wang J, Ma M, Wu Z, Shi HY, Li W, Feng Y, Wu F. A novel metformin derivative showed improvement of lipid metabolism in obese rats with type 2 diabetes. Clin Exp Pharmacol Physiol 2020; 47:1382-1392. [PMID: 32155673 DOI: 10.1111/1440-1681.13302] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 02/26/2020] [Accepted: 03/05/2020] [Indexed: 12/14/2022]
Abstract
In this study, we investigated the lipid metabolism regulatory activity of a novel metformin derivative (MD568) and its potential mechanism of action in obese rats with type 2 diabetes mellitus (T2 DM). Previous gene chip analysis of 3T3-L1 cells have shown that MD568 regulates the transcription of genes involved in the peroxisome proliferator-activated receptor (PPAR) signalling pathway, fatty acid metabolism, and glycerolipid metabolism. In this study, obese T2 DM rats were treated with MD568 (200 mg/kg) for 8 weeks. Results showed that MD568 significantly reduced the body weight gain, plasma glucose, insulin, total cholesterol, triglyceride, and low-density lipoprotein cholesterol levels. MD568 treatment also improved the insulin resistance of obese T2 DM model rats. In particular, in white adipose tissue, MD568 inhibited the excessive volume increment of adipose cells by down-regulating the protein levels of CCAAT/enhancer-binding protein-α (C/EBP-α) and PPAR-γ, as well as the transcription of their target lipid metabolism-related genes. In the liver, MD568 inhibited hepatic fatty lesions and interfered with hepatic gluconeogenesis by regulating the expression of lipid metabolism-related genes and glycogen-related kinases. In conclusion, our results suggest that the newly synthesized MD568 affects the maintenance of lipid homeostasis in obese type 2 diabetic rats.
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Affiliation(s)
- Deqi Chen
- Central Laboratory, Guangdong Pharmaceutical University, Guangzhou, China
| | - Dan Jia
- Integrated Chinese and Western Medicine, Post-doctoral Research Station, Jinan University, Guangzhou, China
- Health Science Centre, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
- Shenzhen Institute of Geriatrics, Shenzhen, China
| | - Xia Wu
- Central Laboratory, Guangdong Pharmaceutical University, Guangzhou, China
| | - Kexin Shi
- Central Laboratory, Guangdong Pharmaceutical University, Guangzhou, China
| | - Cui Ren
- Central Laboratory, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yonghui Dou
- Academy of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Mingxin Guo
- Central Laboratory, Guangdong Pharmaceutical University, Guangzhou, China
| | - Juanxia Wang
- Central Laboratory, Guangdong Pharmaceutical University, Guangzhou, China
| | - Min Ma
- Integrated Chinese and Western Medicine, Post-doctoral Research Station, Jinan University, Guangzhou, China
| | - Zhengzhi Wu
- Health Science Centre, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
- Shenzhen Institute of Geriatrics, Shenzhen, China
| | - He-Yong Shi
- Respiratory and Critical Care Medicine, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, China
| | - Weimin Li
- Academy of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yifan Feng
- Central Laboratory, Guangdong Pharmaceutical University, Guangzhou, China
| | - Fuhai Wu
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
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Attenuation of Free Fatty Acid (FFA)-Induced Skeletal Muscle Cell Insulin Resistance by Resveratrol is Linked to Activation of AMPK and Inhibition of mTOR and p70 S6K. Int J Mol Sci 2020; 21:ijms21144900. [PMID: 32664532 PMCID: PMC7404286 DOI: 10.3390/ijms21144900] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 07/03/2020] [Accepted: 07/09/2020] [Indexed: 12/13/2022] Open
Abstract
Insulin resistance, a main characteristic of type 2 diabetes mellitus (T2DM), is linked to obesity and excessive levels of plasma free fatty acids (FFA). Studies indicated that significantly elevated levels of FFAs lead to skeletal muscle insulin resistance, by dysregulating the steps in the insulin signaling cascade. The polyphenol resveratrol (RSV) was shown to have antidiabetic properties but the exact mechanism(s) involved are not clearly understood. In the present study, we examined the effect of RSV on FFA-induced insulin resistance in skeletal muscle cells in vitro and investigated the mechanisms involved. Parental and GLUT4myc-overexpressing L6 rat skeletal myotubes were used. [3H]2-deoxyglucose (2DG) uptake was measured, and total and phosphorylated levels of specific proteins were examined by immunoblotting. Exposure of L6 cells to FFA palmitate decreased the insulin-stimulated glucose uptake, indicating insulin resistance. Palmitate increased ser307 (131% ± 1.84% of control, p < 0.001) and ser636/639 (148% ± 10.1% of control, p < 0.01) phosphorylation of IRS-1, and increased the phosphorylation levels of mTOR (174% ± 15.4% of control, p < 0.01) and p70 S6K (162% ± 20.2% of control, p < 0.05). Treatment with RSV completely abolished these palmitate-induced responses. In addition, RSV increased the activation of AMPK and restored the insulin-mediated increase in (a) plasma membrane GLUT4 glucose transporter levels and (b) glucose uptake. These data suggest that RSV has the potential to counteract the FFA-induced muscle insulin resistance.
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Sharma N, Navik U, Tikoo K. Unveiling the presence of epigenetic mark by Lactobacillus supplementation in high-fat diet-induced metabolic disorder in Sprague-Dawley rats. J Nutr Biochem 2020; 84:108442. [PMID: 32629239 DOI: 10.1016/j.jnutbio.2020.108442] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/15/2020] [Accepted: 05/24/2020] [Indexed: 12/26/2022]
Abstract
Gut dysbiosis, particularly bacteria from Firmicutes and Bacteroidetes phyla, plays a fundamental role in the progression of metabolic disorders. Probiotics have shown to restore the gut microbiota composition in metabolic disorders with subsequent beneficial effects. Recent studies have reported that several species of Lactobacillus as probiotic supplementation improve insulin sensitivity and glucose metabolism. Nonetheless, whether Lactobacillus could influence the epigenetic modifications that underlie insulin-resistant conditions is still unexplored. Therefore, the current study examined the therapeutic effects and underlying epigenetic mechanisms of three different species of Lactobacillus in the high-fat diet (HFD)-induced insulin-resistant rats. Three different species of Lactobacillus; Lactobacillus casei, Lactobacillus gasseri, and Lactobacillus rhamnosus were individually supplemented orally (109 CFU/mL) to insulin-resistant SD rats for 12 weeks. Lactobacillus supplementation led to a significant reduction in the hyperglycemia, hyperinsulinemia, and hyperlipidemia associated with HFD-induced insulin resistance. Histopathological examination also indicated the protective effects of Lactobacillus supplementation against the hepatic and intestinal damage caused by the high-fat diet. Lactobacillus supplementation also down-regulated the expression of FOXO1, a major transcription factor of insulin signaling. In addition, at the epigenetic level, Lactobacillus supplementation predominantly prevented methylation and demethylation of H3K79me2 and H3K27me3, respectively. Chromatin Immunoprecipitation (ChIP) coupled with quantitative PCR (ChIP-qPCR) assay revealed the presence of cross-talk between these two histone modifications at the promoter region of FOXO1. Taken together, this is the first report to observe that the effects of Lactobacillus supplementation involve alteration in FOXO1 expression via cross-talking between H3K79me2 and H3K27me3 histone modifications.
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Affiliation(s)
- Nisha Sharma
- Laboratory of Epigenetics and Diseases, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, Punjab-160062, India
| | - Umashanker Navik
- Laboratory of Epigenetics and Diseases, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, Punjab-160062, India
| | - Kulbhushan Tikoo
- Laboratory of Epigenetics and Diseases, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, Punjab-160062, India.
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Gao L, Tang H, Zeng Q, Tang T, Chen M, Pu P. The anti-insulin resistance effect of scutellarin may be related to antioxidant stress and AMPKα activation in diabetic mice. Obes Res Clin Pract 2020; 14:368-374. [PMID: 32631803 DOI: 10.1016/j.orcp.2020.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 06/10/2020] [Accepted: 06/23/2020] [Indexed: 12/25/2022]
Abstract
AIMS Scutellarein (Sc), a natural compound and an active ingredient of Erigeronbrevis-capus (Vant.), shows anti-obesity, anti-inflammation and lipid-lowering properties in our previous study. However, no previous in vivo and vitro has been conducted to assess the effects of Sc in insulin resistance (IR). This study investigated the effects of Sc on IR and oxidative stress and explored the underlying mechanisms of action in vivo and vitro. MATERIAL AND METHOD A well-established mouse model of IR, induced by high-fat diet (HFD) feeding, was applied in this study. The effects of Sc were evaluated on obesity, glycometabolism disorder and oxidative stress. The anti-IR effect was assessed using blood glucose, serum insulin, HOMA index, intraperitoneal glucose tolerance tests (IPGTT), intraperitoneal insulin tolerance tests (IPITT), and glucose-regulating enzyme activity. The insulin signaling pathways and AMPKα expressions were tested by Western blot. The primary culture of hepatocytes was prepared and used for confirming the above signaling pathways. RESULTS Obesity, IR and oxidative stress developed in HFD mice. Administration of Sc at a dose of 50mg/kg for 16 weeks effectively attenuated these changes. Further studies revealed the antagonistic effect of Sc on IR was a result of the activation of the insulin signaling pathway and AMPKα. The primary hepatocyte test, stimulated by high glucose, further confirmed that SC exerts anti-IR through the above signaling pathway and key protein. CONCLUSION These results suggested that Sc possesses not only an important novel anti-IR effect but also an anti-oxidative stress effect. These favorable effects were causally associated with weight loss and the improved glycometabolism. The underlying mechanisms might associated with the activation of the insulin signaling pathway and AMPKα. Our study promotes the understanding of the pharmacological actions of Sc, and plays a role for Sc in the effective treatment of diabetes mellitus.
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Affiliation(s)
- Lingyun Gao
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Heng Tang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Qingfu Zeng
- Department of Vascular Surgery, The Second Affiliated Hospital of Nanchang University, People's Republic of China
| | - Ting Tang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Ming Chen
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Peng Pu
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China.
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Akintoye OO, Owoyele BV, Fabunmi OA, Raimi TH, Oniyide AA, Akintoye AO, Ajibare AJ, Ajayi DD, Adeleye GS. Diabetic neuropathy is associated with increased pain perception, low serum beta-endorphin and increase insulin resistance among Nigerian cohorts in Ekiti State. Heliyon 2020; 6:e04377. [PMID: 32685721 PMCID: PMC7358268 DOI: 10.1016/j.heliyon.2020.e04377] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/27/2020] [Accepted: 06/29/2020] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION There has been an increase in the global prevalence of diabetic polyneuropathy and research evidence suggests that insulin resistance plays an important role in its development and prognosis. However, there seem to be a dearth of information in understanding the likely interplay between beta endorphin, insulin resistance and pain perception especially in the setting of painful diabetic neuropathy. METHOD This study recruited 120 volunteers divided into four groups (30 per group): group 1 healthy volunteer (control); group 2 DM type 2 without neuropathy (DM group); group 3 DM type 2 with painful neuropathy (DPN group); group 4 DM type 2 without painful neuropathy (DN). All subjects were evaluated for pain threshold and neuropathy using an ischemia-induced pain model and biothesiometer respectively. Their beta-endorphin, glycated hemoglobin, fasting plasma insulin, and HOMA values were determined and means compared using ANOVA. RESULT Serum beta-endorphin is significantly reduced in DN and DPN (∗p < 0.001) compared with the control and DM group. Also, DPN and DN patients have significantly increased insulin resistance compared to those without neuropathy (∗p < 0.001; ∗p < 0.0001 respectively). There is a significant positive correlation between the pain threshold and beta-endorphin in all the groups except DN group. The correlation between beta-endorphin and insulin resistance was negative and significant in control and DM groups only. Suggestive that the fact that insulin resistance plays an important role in diabetes polyneuropathy, does not alone explain the chronic pain perception noticed in the DPN patients. CONCLUSION The present study demonstrates that diabetic neuropathy patients have a poor endogenous opioid peptide system which is associated with increased pain perception and high insulin resistance. However, insulin resistance alone does not explain the chronic pain perception noticed in the DPN patients. Thus, further study is required.
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Affiliation(s)
- Olabode O. Akintoye
- Physiology Department, College of Medicine, Ekiti State University, Ado Ekiti, Nigeria
| | - Bamidele V. Owoyele
- Physiology Department, College of Health Sciences, University of Ilorin, Ilorin, Nigeria
| | - Oyesanmi A. Fabunmi
- Physiology Department, College of Medicine, Ekiti State University, Ado Ekiti, Nigeria
| | - Taiwo H. Raimi
- Department of Medicine, College of Medicine, Ekiti State University, Ado Ekiti, Nigeria
| | - Adesola A. Oniyide
- Physiology Department, College of Health Sciences, Afe Babalola University, Ado Ekiti, Nigeria
| | - Abimbola O. Akintoye
- Department of Medicine, College of Medicine, Ekiti State University, Ado Ekiti, Nigeria
| | - Ayodeji J. Ajibare
- Physiology Department, College of Medicine, Ekiti State University, Ado Ekiti, Nigeria
| | - David D. Ajayi
- Department of Chemical Pathology, Ekiti State University Teaching Hospital, Ado Ekiti, Nigeria
| | - Gbenga S. Adeleye
- Physiology Department, College of Medicine, Ekiti State University, Ado Ekiti, Nigeria
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Torres M, Rosselló CA, Fernández-García P, Lladó V, Kakhlon O, Escribá PV. The Implications for Cells of the Lipid Switches Driven by Protein-Membrane Interactions and the Development of Membrane Lipid Therapy. Int J Mol Sci 2020; 21:ijms21072322. [PMID: 32230887 PMCID: PMC7177374 DOI: 10.3390/ijms21072322] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/17/2020] [Accepted: 03/19/2020] [Indexed: 02/06/2023] Open
Abstract
The cell membrane contains a variety of receptors that interact with signaling molecules. However, agonist-receptor interactions not always activate a signaling cascade. Amphitropic membrane proteins are required for signal propagation upon ligand-induced receptor activation. These proteins localize to the plasma membrane or internal compartments; however, they are only activated by ligand-receptor complexes when both come into physical contact in membranes. These interactions enable signal propagation. Thus, signals may not propagate into the cell if peripheral proteins do not co-localize with receptors even in the presence of messengers. As the translocation of an amphitropic protein greatly depends on the membrane's lipid composition, regulation of the lipid bilayer emerges as a novel therapeutic strategy. Some of the signals controlled by proteins non-permanently bound to membranes produce dramatic changes in the cell's physiology. Indeed, changes in membrane lipids induce translocation of dozens of peripheral signaling proteins from or to the plasma membrane, which controls how cells behave. We called these changes "lipid switches", as they alter the cell's status (e.g., proliferation, differentiation, death, etc.) in response to the modulation of membrane lipids. Indeed, this discovery enables therapeutic interventions that modify the bilayer's lipids, an approach known as membrane-lipid therapy (MLT) or melitherapy.
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Affiliation(s)
- Manuel Torres
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, Ctra. de Valldemossa km 7.5, E-07122 Palma, Spain; (M.T.); (C.A.R.); (P.F.-G.); (V.L.)
- Department of R&D, Laminar Pharmaceuticals SL. ParcBit, Ed. Naorte B, E-07121 Palma, Spain
| | - Catalina Ana Rosselló
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, Ctra. de Valldemossa km 7.5, E-07122 Palma, Spain; (M.T.); (C.A.R.); (P.F.-G.); (V.L.)
- Department of R&D, Laminar Pharmaceuticals SL. ParcBit, Ed. Naorte B, E-07121 Palma, Spain
| | - Paula Fernández-García
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, Ctra. de Valldemossa km 7.5, E-07122 Palma, Spain; (M.T.); (C.A.R.); (P.F.-G.); (V.L.)
- Department of R&D, Laminar Pharmaceuticals SL. ParcBit, Ed. Naorte B, E-07121 Palma, Spain
| | - Victoria Lladó
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, Ctra. de Valldemossa km 7.5, E-07122 Palma, Spain; (M.T.); (C.A.R.); (P.F.-G.); (V.L.)
- Department of R&D, Laminar Pharmaceuticals SL. ParcBit, Ed. Naorte B, E-07121 Palma, Spain
| | - Or Kakhlon
- Department of Neurology, Hadassah-Hebrew University Medical Center, Ein Kerem, 91120 Jerusalem, Israel;
| | - Pablo Vicente Escribá
- Laboratory of Molecular Cell Biomedicine, Department of Biology, University of the Balearic Islands, Ctra. de Valldemossa km 7.5, E-07122 Palma, Spain; (M.T.); (C.A.R.); (P.F.-G.); (V.L.)
- Correspondence:
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Zhang W, Meng J, Liu Q, Makinde EA, Lin Q, Olatunji OJ. Shorea roxburghii Leaf Extract Ameliorates Hyperglycemia Induced Abnormalities in High Fat/Fructose and Streptozotocin Induced Diabetic Rats. Chem Biodivers 2020; 17:e1900661. [PMID: 31981405 DOI: 10.1002/cbdv.201900661] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 01/24/2020] [Indexed: 12/12/2022]
Abstract
This study investigated the hypoglycemic effect of the methanol extract of Shorea roxburghii leaves (SRL) in high fat diet/high fructose solution (HFDHF) and streptozotocin (STZ) induced type 2 diabetes mellitus (T2DM) in rats as well as evaluating its ameliorative potentials in altered biochemical and hematological parameters in the treated rats. T2DM was induced in Sprague Dawley (SD) rats by feeding with HFDHF for 4 weeks and administering STZ (35 mg/kg, i. p.). Diabetic rats were given SRL extract at doses of 100 and 400 mg/kg for 30 days. The food and water intake were monitored on a daily basis, while the fasting blood glucose (FBG) levels and body weight were measured weekly. Biochemical and hematological parameters as well as histopathological studies of the pancreas were also evaluated. SRL significantly decreased FBG and improved the body weight, food and water intake of treated diabetic rats. Furthermore, biochemical and hematological parameters including liver and kidney function enzymes, lipid profiles, white blood and red blood cells parameters were markedly ameliorated by SRL. Histopathological analyses of the pancreas indicated reconstitution of β-cells architecture in SRL treated rats. The results of this study suggest that SRL has antidiabetic potential and can be considered for the treatment of T2DM.
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Affiliation(s)
- Wei Zhang
- Department of Endocrinology, Jiangxi Province Hospital of Integrated Chinese and Western Medicine, Nanchang, 330002, P. R. China
| | - Jie Meng
- Department of Endocrinology, Jiangxi Province Hospital of Integrated Chinese and Western Medicine, Nanchang, 330002, P. R. China
| | - Qian Liu
- Department of Endocrinology, Jiangxi Province Hospital of Integrated Chinese and Western Medicine, Nanchang, 330002, P. R. China
| | | | - Qing Lin
- Department of Cardiothoracic Surgery, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, Nanchang, 330006, P. R. China
| | - Opeyemi Joshua Olatunji
- Faculty of Thai Traditional Medicine, Prince of Songkla University, Hat Yai, 90110, Thailand
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de Fatima Silva F, de Morais H, Ortiz Silva M, da Silva FG, Vianna Croffi R, Serrano-Nascimento C, Rodrigues Graciano MF, Rafael Carpinelli A, Barbosa Bazotte R, de Souza HM. Akt activation by insulin treatment attenuates cachexia in Walker-256 tumor-bearing rats. J Cell Biochem 2020; 121:4558-4568. [PMID: 32056265 DOI: 10.1002/jcb.29682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 01/16/2020] [Indexed: 11/11/2022]
Abstract
Cancer-bearing often exhibits hypoinsulinemia, insulin (INS) resistance and glutamine depletion associated with cachexia. However, INS and glutamine effects on cachexia metabolic abnormalities, particularly on tumor-affected proteins related to INS resistance, are poorly known. The main purpose of this study was to investigate the effects of INS and glutamine dipeptide (GDP) treatments on phospho-protein kinase B (p-Akt), and phospho-hormone sensitive lipase (p-HSL) in Walker-256 tumor-bearing rats. INS (NPH, 40 UI/kg, subcutaneous), GDP (1.5 g/kg, oral), INS+GDP or vehicle (control rats) were administered for 13 days, once a day, starting at the day of inoculation of tumor cells. The experiments were performed 4 hours after the last treatment to evaluate acute effects of INS and GDP, besides the chronic effects. INS and/or INS+GDP treatments, which markedly increased the insulinemia, increased the p-Akt: total Akt ratio and prevented the increased p-HSLSer552 : total HSL ratio in the retroperitoneal fat of tumor-bearing rats, without changing the INS resistance and increased expression of factor tumor necrosis-α (TNF-α) in this tissue. INS and INS+GDP also increased the p-Akt: total Akt ratio, whereas GDP and INS+GDP increased the GLUT4 glucose transporter gene expression, in the gastrocnemius muscle of the tumor-bearing rats. Accordingly, treatments with INS and INS+GDP markedly reduced glycemia, increased retroperitoneal fat and attenuated the body mass loss of tumor-bearing rats. In conclusion, hyperinsulinemia induced by high-dose INS treatments increased Akt phosphorylation and prevented increased p-HSLSer552 : total HSL ratio, overlapping INS resistance. These effects are consistent with increased fat mass gain and weight loss (cachexia) attenuation of tumor-bearing rats, evidencing that Akt activation is a potential strategy to prevent loss of fat mass in cancer cachexia.
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Affiliation(s)
| | - Hely de Morais
- Department of Physiological Sciences, State University of Londrina, Londrina, Parana, Brazil
| | - Milene Ortiz Silva
- Department of Physiological Sciences, State University of Londrina, Londrina, Parana, Brazil
| | | | - Rafael Vianna Croffi
- Department of Physiology and Biophysics, University of São Paulo, São Paulo, Parana, Brazil
| | | | | | | | - Roberto Barbosa Bazotte
- Department of Pharmacology and Therapeutics, State University of Maringá, Maringa, Parana, Brazil
| | - Helenir Medri de Souza
- Department of Physiological Sciences, State University of Londrina, Londrina, Parana, Brazil
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Minami S, Yokota N, Kawahara H. BAG6 contributes to glucose uptake by supporting the cell surface translocation of the glucose transporter GLUT4. Biol Open 2020; 9:bio.047324. [PMID: 31911483 PMCID: PMC6994957 DOI: 10.1242/bio.047324] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Defective translocation of glucose transporter 4 (GLUT4) to the cell surface is a key feature of insulin resistance in type 2 diabetes. Therefore, elucidating the mechanism of GLUT4 translocation is of primary importance. The mammalian Bag6/Bat3 gene has been suggested to be linked with potential obesity- and diabetes-associated loci, while its function in the control of glucose incorporation into the cytoplasm has not been investigated. In this study, we established a series of cell lines that stably expressed GLUT4 with three tandem repeats of the antigenic peptide inserted into its 1st extracellular loop. With these cell lines, we found that the depletion of endogenous BAG6 downregulated the cell surface expression of GLUT4, concomitant with the reduced incorporation of a glucose analog into the cells. Defective intracellular translocation of GLUT4 in BAG6-depleted cells is similar to the case observed for the depletion of Rab8a, an essential regulator of insulin-stimulated GLUT4 translocation. In addition, we observed that the assembly of syntaxin 6 into the endoplasmic reticulum membrane was slightly disturbed under BAG6 depletion. Given that Rab8a and syntaxin 6 are critical for GLUT4 translocation, we suggest that BAG6 may play multiple roles in the trafficking of glucose transporters to the cell surface. This article has an associated First Person interview with the first author of the paper. Summary: BAG6 is critical for the insulin-stimulated translocation of GLUT4 from its peri-nuclear storage compartments to the cell surface.
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Affiliation(s)
- Setsuya Minami
- Laboratory of Cell Biology and Biochemistry, Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Naoto Yokota
- Laboratory of Cell Biology and Biochemistry, Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Hiroyuki Kawahara
- Laboratory of Cell Biology and Biochemistry, Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
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Akalestou E, Genser L, Rutter GA. Glucocorticoid Metabolism in Obesity and Following Weight Loss. Front Endocrinol (Lausanne) 2020; 11:59. [PMID: 32153504 PMCID: PMC7045057 DOI: 10.3389/fendo.2020.00059] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/30/2020] [Indexed: 01/08/2023] Open
Abstract
Glucocorticoids are steroid hormones produced by the adrenal cortex and are essential for the maintenance of various metabolic and homeostatic functions. Their function is regulated at the tissue level by 11β-hydroxysteroid dehydrogenases and they signal through the glucocorticoid receptor, a ligand-dependent transcription factor. Clinical observations have linked excess glucocorticoid levels with profound metabolic disturbances of intermediate metabolism resulting in abdominal obesity, insulin resistance and dyslipidaemia. In this review, we discuss the physiological mechanisms of glucocorticoid secretion, regulation and function, and survey the metabolic consequences of excess glucocorticoid action resulting from elevated release and activation or up-regulated signaling. Finally, we summarize the reported impact of weight loss by diet, exercise, or bariatric surgery on circulating and tissue-specific glucocorticoid levels and examine the therapeutic possibility of reversing glucocorticoid-associated metabolic disorders.
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Affiliation(s)
- Elina Akalestou
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, United Kingdom
| | - Laurent Genser
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, United Kingdom
- Department of Digestive and Hepato-Pancreato-Biliary Surgery, Liver Transplantation, Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière University Hospital, Institut Hospitalo-Universitaire ICAN, Sorbonne Université, Paris, France
| | - Guy A. Rutter
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, United Kingdom
- *Correspondence: Guy A. Rutter
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82
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Shamnani G, Bhartiy SS, Jiwane R, Gupta V, Verma N, Verma D. Correlation of Serum Magnesium with Insulin Resistance in North Indian Adult Population. Curr Diabetes Rev 2020; 16:254-261. [PMID: 30332968 DOI: 10.2174/1573399814666181016164432] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 09/27/2018] [Accepted: 10/10/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Globalization has lead to such lifestyle changes which have produced increase in incidence and prevalence of Type 2 Diabetes Mellitus (T2DM). Magnesium is found to have some role in glucose metabolism. The aim of this study was to investigate the relationship between serum magnesium levels with insulin resistance in apparently healthy adults. OBJECTIVE The objective of our study was to evaluate correlation of serum magnesium with fasting blood sugar, insulin level and Homeostasis model assessment-insulin resistance (HOMA-IR) index (indicator of insulin resistance) on the basis of the hypothesis that subjects with hypomagnesaemia are more prone to develop hyperglycemia and insulin resistance. MATERIALS AND METHODS The study was a cross-sectional study which was population based. Total 130 apparently healthy adults of age between 25-65 years, were recruited with prior ethical approval and written informed consent. RESULTS Serum magnesium was found to be negatively correlated with fasting blood sugar (FBS), insulin level and HOMA-IR. Co-relation of magnesium with FBS (r = -0.55, p<0.0001), insulin (r = -0.45, p< 0.0001) and HOMA-IR (r = -0.52, p<0.0001) was significant. CONCLUSION As per findings it was concluded that serum magnesium was found to have significant negative correlation with fasting blood sugar (FBS), insulin and HOMA-IR, thus hypomagnesaemia can be suggested to be one of the important predictor of type 2 diabetes mellitus.
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Affiliation(s)
| | - Shekhawat S Bhartiy
- World Health Organization, National Public Health Surveillance Project, Bhopal, India
| | - Rekha Jiwane
- World Health Organization, National Public Health Surveillance Project, Bhopal, India
| | - Vani Gupta
- Department of Physiology, RKDF MCH & RC, Bhopal, India
- Department of Physiology, King Georges Medical University, Lucknow, India
| | - Narsingh Verma
- Department of Physiology, RKDF MCH & RC, Bhopal, India
- Department of Physiology, King Georges Medical University, Lucknow, India
| | - Dileep Verma
- Department of Physiology, RKDF MCH & RC, Bhopal, India
- Department of Physiology, King Georges Medical University, Lucknow, India
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83
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Wondmkun YT. Obesity, Insulin Resistance, and Type 2 Diabetes: Associations and Therapeutic Implications. Diabetes Metab Syndr Obes 2020; 13:3611-3616. [PMID: 33116712 PMCID: PMC7553667 DOI: 10.2147/dmso.s275898] [Citation(s) in RCA: 259] [Impact Index Per Article: 64.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 09/23/2020] [Indexed: 01/12/2023] Open
Abstract
Obesity is a triggering factor for diabetes associated with insulin resistance. In individuals who are obese, higher amounts of non-esterified fatty acids, glycerol, hormones, and pro-inflammatory cytokines that could participate in the development of insulin resistance are released by adipose tissue. Besides, endoplasmic reticulum stress, adipose tissue hypoxia, oxidative stress, lipodystrophy, and genetic background have a role in insulin resistance. However, no effective drug therapy was developed for type 2 diabetes mellitus targeting these physiological factors. This is might be due to a lack of agreement on the comprehensive mechanism of insulin resistance. Therefore, this review assesses the cellular components of each physiologic and pathophysiologic factors that are involved in obesity associated insulin resistance, and may encourage further drug development in this field.
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Affiliation(s)
- Yohannes Tsegyie Wondmkun
- Department of Pharmacology and Clinical Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
- Correspondence: Yohannes Tsegyie Wondmkun Department of Pharmacology and Clinical Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia Email
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84
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Roberts-Thomson KM, Betik AC, Premilovac D, Rattigan S, Richards SM, Ross RM, Russell RD, Kaur G, Parker L, Keske MA. Postprandial microvascular blood flow in skeletal muscle: Similarities and disparities to the hyperinsulinaemic-euglycaemic clamp. Clin Exp Pharmacol Physiol 2019; 47:725-737. [PMID: 31868941 DOI: 10.1111/1440-1681.13237] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 12/12/2019] [Accepted: 12/18/2019] [Indexed: 12/22/2022]
Abstract
Skeletal muscle contributes to ~40% of total body mass and has numerous important mechanical and metabolic roles in the body. Skeletal muscle is a major site for glucose disposal following a meal. Consequently, skeletal muscle plays an important role in postprandial blood glucose homeostasis. Over the past number of decades, research has demonstrated that insulin has an important role in vasodilating the vasculature in skeletal muscle in response to an insulin infusion (hyperinsulinaemic-euglycaemic clamp) or following the ingestion of a meal. This vascular action of insulin is pivotal for glucose disposal in skeletal muscle, as insulin-stimulated vasodilation increases the delivery of both glucose and insulin to the myocyte. Notably, in insulin-resistant states such as obesity and type 2 diabetes, this vascular response of insulin in skeletal muscle is significantly impaired. Whereas the majority of work in this field has focussed on the action of insulin alone on skeletal muscle microvascular blood flow and myocyte glucose metabolism, there is less understanding of how the consumption of a meal may affect skeletal muscle blood flow. This is in part due to complex variations in glucose and insulin dynamics that occurs postprandially-with changes in humoral concentrations of glucose, insulin, amino acids, gut and pancreatic peptides-compared to the hyperinsulinaemic-euglycaemic clamp. This review will address the emerging body of evidence to suggest that postprandial blood flow responses in skeletal muscle may be a function of the nutritional composition of a meal.
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Affiliation(s)
- Katherine M Roberts-Thomson
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, VIC, Australia
| | - Andrew C Betik
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, VIC, Australia
| | - Dino Premilovac
- School of Medicine, University of Tasmania, Hobart, TAS, Australia
| | - Stephen Rattigan
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | | | - Renee M Ross
- School of Medicine, University of Tasmania, Hobart, TAS, Australia
| | - Ryan D Russell
- Department of Health and Human Performance, College of Health Professions, University of Texas Rio Grande Valley, Brownsville, TX, USA
| | - Gunveen Kaur
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, VIC, Australia
| | - Lewan Parker
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, VIC, Australia
| | - Michelle A Keske
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, VIC, Australia.,Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
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85
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Gong Y, Liu H, Tao L. Cajanonic acid A regulates the ratio of Th17/Treg via inhibition of expression of IL-6 and TGF-β in insulin-resistant HepG2 cells. Biosci Rep 2019; 39:BSR20181716. [PMID: 31729529 PMCID: PMC6928521 DOI: 10.1042/bsr20181716] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 07/01/2019] [Accepted: 09/18/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The objectives of the present study are to investigate whether cajanonic acid A (CAA) can reduce insulin resistance (IR) in HepG2 cells and to gain a preliminary understanding of the mechanisms underlying this effect. METHODS Following induction of IR in HepG2 cells, we tested the regulatory effect of CAA on glucose consumption and evaluated hepatocyte production of IL-6, TGF-β, and key molecules in the insulin transduction pathway. A transwell co-culturing system was used to assess the effect of CAA on IR in HepG2 cells during the differentiation of CD4+ T cells by calculating the ratio of (Th17)/regulatory T cell (Treg). We evaluated the effect of CAA on the expression of IL-17RC cells and HepG2 cell apoptosis by immunofluorescence and flow cytometry assay. RESULTS CAA improved dexamethasone-induced reduction in glucose consumption in HepG2 cells, inhibited hepatocyte production of IL-6 and TGF-β, increased the expression of IL-17RC cell, and increased cellular apoptosis in insulin-resistant HepG2 cells. When co-cultured with CD4+ T cells, insulin-resistant HepG2 cells induced a decrease in the ratio of Th17/Treg, but CAA dampened the effect. Application of IL-6 and TGF-β, together with CAA, reversed the effect of CAA on insulin-resistant HepG2 cells. Overexpression of IL17R, however, counteracted the effect of IL-6 neutralizing antibody within the culture system. CONCLUSION CAA can regulate the ratio of Th17/Treg by mediating the expression of IL-6 and TGF-β in insulin-resistant HepG2 cells.
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Affiliation(s)
- Yanfeng Gong
- Department of Geriatrics, The First Affiliated Hospital of Nanchang University, No. 17, Yongwai Zheng Street, Nanchang 330006, Jiangxi, China
| | - Huanbing Liu
- Department of Geriatrics, The First Affiliated Hospital of Nanchang University, No. 17, Yongwai Zheng Street, Nanchang 330006, Jiangxi, China
| | - Liming Tao
- Department of Geriatrics, The First Affiliated Hospital of Nanchang University, No. 17, Yongwai Zheng Street, Nanchang 330006, Jiangxi, China
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86
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Pradas I, Rovira-Llopis S, Naudí A, Bañuls C, Rocha M, Hernandez-Mijares A, Pamplona R, Victor VM, Jové M. Metformin induces lipid changes on sphingolipid species and oxidized lipids in polycystic ovary syndrome women. Sci Rep 2019; 9:16033. [PMID: 31690730 PMCID: PMC6831788 DOI: 10.1038/s41598-019-52263-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 09/30/2019] [Indexed: 02/06/2023] Open
Abstract
Metformin is one of the treatments used for PCOS pathology decreasing body weight, plasma androgen, FSH and glucose levels. Unfortunately, there is little known about metformin's effects on lipid metabolism, a crucial process in PCOS pathology. We have employed a lipidomic approach to explore alterations in the plasma lipid profile of patients with PCOS following metformin treatment. The aim is to offer new insights about the effect of metformin in PCOS patients. Plasma samples were obtained from 27 subjects prior to and following 12 weeks of metformin treatment. A detailed biochemical characterization and lipidomic profile was performed. Metformin reduces BMI, HOMA-IR, FSH and androstenedione and increases DHEA-S but no changes were found in glucose levels after treatment. Multivariate statistics revealed a specific lipidomic signature due to the effect of 12 weeks of metformin treatment in PCOS patients. This signature includes changes in sphingolipid metabolism suggesting a crosstalk between these lipid species and the androgenic metabolism and a decrease in oxidized lipids reinforcing that metformin treatment improves oxidative stress status. Our study confirms the specific effect of metformin in lipid metabolism on women with PCOS after 12 weeks of treatment.
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Affiliation(s)
- Irene Pradas
- Department of Experimental Medicine, Lleida University-Institute for Research in Biomedicine of Lleida (UdL-IRBLleida), 25198, Lleida, Spain
| | - Susana Rovira-Llopis
- Foundation for the Promotion of Healthcare and Biomedical Research in the Valencian Community (FISABIO), Service of Endocrinology, University Hospital Dr. Peset, 46017, Valencia, Spain
| | - Alba Naudí
- Department of Experimental Medicine, Lleida University-Institute for Research in Biomedicine of Lleida (UdL-IRBLleida), 25198, Lleida, Spain
| | - Celia Bañuls
- Foundation for the Promotion of Healthcare and Biomedical Research in the Valencian Community (FISABIO), Service of Endocrinology, University Hospital Dr. Peset, 46017, Valencia, Spain
| | - Milagros Rocha
- Foundation for the Promotion of Healthcare and Biomedical Research in the Valencian Community (FISABIO), Service of Endocrinology, University Hospital Dr. Peset, 46017, Valencia, Spain
| | - Antonio Hernandez-Mijares
- Foundation for the Promotion of Healthcare and Biomedical Research in the Valencian Community (FISABIO), Service of Endocrinology, University Hospital Dr. Peset, 46017, Valencia, Spain
- Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia University, 46010, Valencia, Spain
- Department of Medicine, Valencia University, 46010, Valencia, Spain
| | - Reinald Pamplona
- Department of Experimental Medicine, Lleida University-Institute for Research in Biomedicine of Lleida (UdL-IRBLleida), 25198, Lleida, Spain
| | - Victor M Victor
- Foundation for the Promotion of Healthcare and Biomedical Research in the Valencian Community (FISABIO), Service of Endocrinology, University Hospital Dr. Peset, 46017, Valencia, Spain.
- Department of Physiology, Valencia University, 46010, Valencia, Spain.
| | - Mariona Jové
- Department of Experimental Medicine, Lleida University-Institute for Research in Biomedicine of Lleida (UdL-IRBLleida), 25198, Lleida, Spain.
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87
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Tetramethylpyrazine prevents diabetes by activating PI3K/Akt/GLUT-4 signalling in animal model of type-2 diabetes. Life Sci 2019; 236:116836. [DOI: 10.1016/j.lfs.2019.116836] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/22/2019] [Accepted: 09/03/2019] [Indexed: 12/16/2022]
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88
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Li S, Qian Y, Xie R, Li Y, Jia Z, Zhang Z, Huang R, Tuo L, Quan Y, Yu Z, Liu J, Xiang M. Exploring the protective effect of ShengMai-Yin and Ganmaidazao decoction combination against type 2 diabetes mellitus with nonalcoholic fatty liver disease by network pharmacology and validation in KKAy mice. JOURNAL OF ETHNOPHARMACOLOGY 2019; 242:112029. [PMID: 31216433 DOI: 10.1016/j.jep.2019.112029] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 06/10/2019] [Accepted: 06/11/2019] [Indexed: 05/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE ShengMai-Yin and Ganmaidazao decoction are classic formulas in traditional Chinese medicine. Individually, Shengmai-Yin is used to treat cardiovascular diseases, and Ganmaidazao decoction for therapy of mental disorders. The combination of Shengmai-Yin and Ganmaidazao decoction (SGD) is normally used as adjuvant therapy for type 2 diabetes mellitus (T2DM). AIM OF THE STUDY The central aim is to elucidate the pharmacological efficacy of SGD and its mechanism in the treatment of T2DM with non-alcoholic fatty liver disease (NAFLD). MATERIALS AND METHODS Active ingredients in SGD and their drug targets were identified using network analysis followed by experimental validation. First, existing databases were mined for information relevant to SGD, including pharmacological actions, chemical components, physicochemical characteristics, potential targets, and implicated diseases. Candidate patterns obtained with the network analysis were then tested in a KKAy mouse model of T2DM with NAFLD. Various doses of SGD were administered, followed by measurements of fasting blood glucose, oral glucose tolerance tests, insulin tolerance tests, markers of lipid metabolism - including free fatty acids (FFA), triglycerides (TG), and total cholesterol (TC) - liver histology, and expression levels of implicated molecules including PI3K/AKT and PPARα. RESULTS Over 300 potential active compounds with their physicochemical characteristics and 562 candidate targets were collected, and then the network of them was constructed. Follow-up pathway and functional enrichment analyses indicated that SGD influences metabolism-related signaling pathways including PI3K-Akt, AMPK, and PPAR. In validation experiments, treatment of KKAy mice with SGD reduced serum levels of glucose, TC, TG, and FFA, decreased numbers of crown-like structures in visceral adipose tissue, reduced adipocyte size, and lowered liver lipid deposits. Further, SGD improved liver metabolism by increasing the expressions of PPARα, HSL, and PI3K/Akt, and decreasing expressions of SREBP-1 and FASN, inhibiting lipid biosynthesis, and increasing insulin sensitivity. CONCLUSION Experimental validation of network analysis revealed anti-diabetic effects of the plant product SGD, manifested most notably by improved serum profiles and diminished insulin resistance. These experimental results may have clinical implications.
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Affiliation(s)
- Senlin Li
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Ying Qian
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Rui Xie
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Yangsha Li
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Zhao Jia
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Zijun Zhang
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Rongrong Huang
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Lingling Tuo
- Department of Traditional Chinese Medicine, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Yihong Quan
- Department of Traditional Chinese Medicine, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Zhihong Yu
- Department of Traditional Chinese Medicine, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Jue Liu
- Department of Traditional Chinese Medicine, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Ming Xiang
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Rosik J, Szostak B, Machaj F, Pawlik A. The role of genetics and epigenetics in the pathogenesis of gestational diabetes mellitus. Ann Hum Genet 2019; 84:114-124. [DOI: 10.1111/ahg.12356] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 09/07/2019] [Accepted: 09/09/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Jakub Rosik
- Department of Physiology Pomeranian Medical University Szczecin Poland
| | - Bartosz Szostak
- Department of Physiology Pomeranian Medical University Szczecin Poland
| | - Filip Machaj
- Department of Physiology Pomeranian Medical University Szczecin Poland
| | - Andrzej Pawlik
- Department of Physiology Pomeranian Medical University Szczecin Poland
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90
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Zeng Z, Yuan Q, Yu R, Zhang J, Ma H, Chen S. Ameliorative Effects of Probiotic Lactobacillus paracasei NL41 on Insulin Sensitivity, Oxidative Stress, and Beta-Cell Function in a Type 2 Diabetes Mellitus Rat Model. Mol Nutr Food Res 2019; 63:e1900457. [PMID: 31433912 DOI: 10.1002/mnfr.201900457] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/17/2019] [Indexed: 01/31/2023]
Abstract
SCOPE The present study aims to assess the antidiabetic effect of Lactobacillus paracasei strain NL41 and its potential mechanisms in rats with type 2 diabetes mellitus (T2DM) induced by a high-fat diet and low-dose streptozotocin administration (HFD/STZ). METHODS AND RESULTS Eighteen Sprague-Dawley (SD) rats are randomly assigned to three groups: one control, one HFD/STZ model, and one HFD/STZ-Lactobacillus protection group with administration of strain NL41 for 12 weeks. Blood is collected for biochemical parameters analysis and tissue samples for histological analysis. Treatment with strain NL41 results in excellent blood glucose regulation and significantly decreases insulin resistance, and HbA1c, glucagon, and leptin levels, accompanied by remarkable improvement of dyslipidemia and oxidative stress status in the animals. Islets of Langerhans, liver, and kidney are significantly protected in the NL41-treated rats compared to the HFD/STZ-T2DM model rats. Histochemistry shows that strain NL41 inhibits beta-cell loss and alpha-cell expansion, indicating pancreatic islets as the targeted tissues for the primary ameliorative effect of the probiotic strain on HFD/STZ-T2DM rats. Crosstalk between the gut-liver and liver-pancreas endocrine axes is discussed. CONCLUSION Probiotic strain NL41 prevents HFD/STZ-T2DM by decreasing insulin resistance and oxidative stress status, and protecting beta-cell function.
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Affiliation(s)
- Zhu Zeng
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericulture Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, 400715, P. R. China.,Beijing Advanced Innovation Center for Food Nutrition and Human Health, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, P. R. China
| | - Qipeng Yuan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, P. R. China
| | - Rui Yu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, P. R. China
| | - Jinlan Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, P. R. China
| | - Huiqin Ma
- College of Horticulture, China Agricultural University, Beijing, 100193, P. R. China
| | - Shangwu Chen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, P. R. China
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91
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The Short-Chain Fatty Acid Acetate in Body Weight Control and Insulin Sensitivity. Nutrients 2019; 11:nu11081943. [PMID: 31426593 PMCID: PMC6723943 DOI: 10.3390/nu11081943] [Citation(s) in RCA: 297] [Impact Index Per Article: 59.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/08/2019] [Accepted: 08/15/2019] [Indexed: 02/06/2023] Open
Abstract
The interplay of gut microbiota, host metabolism, and metabolic health has gained increased attention. Gut microbiota may play a regulatory role in gastrointestinal health, substrate metabolism, and peripheral tissues including adipose tissue, skeletal muscle, liver, and pancreas via its metabolites short-chain fatty acids (SCFA). Animal and human data demonstrated that, in particular, acetate beneficially affects host energy and substrate metabolism via secretion of the gut hormones like glucagon-like peptide-1 and peptide YY, which, thereby, affects appetite, via a reduction in whole-body lipolysis, systemic pro-inflammatory cytokine levels, and via an increase in energy expenditure and fat oxidation. Thus, potential therapies to increase gut microbial fermentation and acetate production have been under vigorous scientific scrutiny. In this review, the relevance of the colonically and systemically most abundant SCFA acetate and its effects on the previously mentioned tissues will be discussed in relation to body weight control and glucose homeostasis. We discuss in detail the differential effects of oral acetate administration (vinegar intake), colonic acetate infusions, acetogenic fiber, and acetogenic probiotic administrations as approaches to combat obesity and comorbidities. Notably, human data are scarce, which highlights the necessity for further human research to investigate acetate’s role in host physiology, metabolic, and cardiovascular health.
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92
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Pánico P, Juárez-Nájera A, Iturriaga-Goyon E, Ostrosky-Wegman P, Salazar AM. Arsenic impairs GLUT1 trafficking through the inhibition of the calpain system in lymphocytes. Toxicol Appl Pharmacol 2019; 380:114700. [PMID: 31398423 DOI: 10.1016/j.taap.2019.114700] [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: 05/24/2019] [Revised: 07/24/2019] [Accepted: 08/04/2019] [Indexed: 01/28/2023]
Abstract
Exposure to arsenic is associated with increased risk of developing insulin resistance and type 2 diabetes. The proteases calpain-1 (CAPN1), calpain-2 (CAPN2) and calpain-10 (CAPN10) and their endogenous inhibitor calpastatin (CAST) regulate glucose uptake in skeletal muscle and adipocytes. We investigated whether arsenic disrupts GLUT1 trafficking and function through calpain inhibition, using lymphocytes as a cell model. Lymphocytes from healthy subjects were treated with 0.1 or 1 μM of sodium arsenite for 72 h and challenged with 3.9 or 11.1 mM of glucose. Our results showed that arsenite inhibited GLUT1 trafficking, glucose uptake, and calpain activity in the presence of 11.1 mM of glucose. These correlated with a decrease in the autolytical fragment of 50 kDa of CAPN1 and increased levels of CAST, but there were no changes in CAPN2 and CAPN10. We used a cell-free system to evaluate the effect of arsenite over CAPN1, finding that arsenite induced CAPN1 autolysis. To confirm that calpains are involved in GLUT1 trafficking and glucose uptake in lymphocytes, we generated stable CAPN1 or CAPN10 knockdowns in Jurkat cells using short hairpin RNA (shRNA). CAPN1 knockdown induced glucose uptake, while CAPN10 knockdown diminished glucose uptake, which correlated with a significant reduction of calpain activity after the pulse with 11.1 mM of glucose. These data showed that CAPN10 was responsible for the induction of calpain activity after the challenge with 11.1 mM of glucose and that CAPN1 and CAPN10 regulate glucose uptake in lymphocytes. Altogether, our results suggest that arsenite impairs GLUT1 trafficking and function through calpain dysregulation.
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Affiliation(s)
- Pablo Pánico
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico
| | - Adriana Juárez-Nájera
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico
| | - Emilio Iturriaga-Goyon
- MD/PhD (PECEM) Program, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico
| | | | - Ana María Salazar
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico.
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Maldonado-Hernández J, Martínez-Basila A, Rendón-Macías ME, López-Alarcón M. Accuracy of the 13C-glucose breath test to identify insulin resistance in non-diabetic adults. Acta Diabetol 2019; 56:923-929. [PMID: 30955127 DOI: 10.1007/s00592-019-01318-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 03/01/2019] [Indexed: 01/02/2023]
Abstract
AIMS To assess the validity of the 13C-glucose breath test (13C-GBT) to identify insulin resistance (IR) in non-diabetic individuals, using hyperinsulinemic-euglycemic clamps as gold standard. This validity was compared with that of other IR surrogates. METHODOLOGY Non-diabetic adults were studied in a cross-sectional design. In a first appointment, oral glucose tolerance tests were conducted simultaneously with 13C-GBTs. Oral 75 g glucose dissolved in 150 ml water, followed by 1.5 mg/Kg body weight U-13C-glucose dissolved in 50 ml water, was administered. Breath and blood samples were collected at baseline and at 30-min intervals. The percentages of glucose-oxidized dose at given periods were calculated. Clamps were conducted a week later. A clamp-derived M value ≤ 6.0 mg/kg*min was used as cut-off. ROC curves were constructed for 13C-GBT, fasting insulin, HOMA, and ISI-composite. RESULTS Thirty-eight subjects completed the study protocol. The correlation coefficient between the 13C-GBT derived glucose-oxidized dose at 180 min and M values was 0.524 (p = 0.001). The optimal value to identify IR with the 13C-GBT was 4.23% (AUC 0.81; 95CI 0.66, 0.96; accuracy 0.82, 95CI 0.66, 0.92). The 13C-GBT sensitivity (0.88) was higher than HOMA and fasting insulin sensitivities (0.83 and 0.75 respectively), while their specificities were comparable (0.71, 0.71, and 0.79, respectively). The sensitivity of ISI-C was higher (0.92) than that of the 13C-GBT, but its specificity was poor (0.36). The accuracy of the 13C-GBT was superior to that of the other studied surrogates. CONCLUSIONS The 13C-GBT is a valid and accurate method to detect IR in non-diabetic adults. Therefore, it is potentially useful in clinical and community settings.
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Affiliation(s)
- Jorge Maldonado-Hernández
- Unidad de Investigación Médica en Nutrición, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Av. Cuauhtémoc 330, 06720, México City, Mexico
| | - Azucena Martínez-Basila
- Unidad de Investigación Médica en Nutrición, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Av. Cuauhtémoc 330, 06720, México City, Mexico
| | - Mario Enrique Rendón-Macías
- Unit of Research in Clinical Epidemiology, Centro Médico Nacional "Siglo XXI", Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Mardia López-Alarcón
- Unidad de Investigación Médica en Nutrición, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Av. Cuauhtémoc 330, 06720, México City, Mexico.
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94
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Udoh BE, Archibong BE, Egong AE. Sonographic Assessment of Heel Pad Thickness in Patients With Poorly Controlled Diabetes. JOURNAL OF DIAGNOSTIC MEDICAL SONOGRAPHY 2019. [DOI: 10.1177/8756479319856283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The aim was to compare the heel pad thickness (HPT) in diabetic patients with high biochemical parameters (fasting blood sugar [FBS], hemoglobin A1c [HbA1c], and lipid profile) with nondiabetic counterparts. A total of 438 subjects made up of 216 diabetics with high biochemical parameters (poorly controlled) and 222 apparently healthy subjects were recruited. The HPT, FBS level, HbA1c values and lipid profile, and duration of diabetes mellitus were assessed. Results showed that the mean HPT was 13.33 ± 1.29 mm in the control subjects and 16.79 ± 1.84 mm in diabetics. The HPT among diabetics differed significantly from the control group ( P < .05). The mean value of HbA1c in the control group was 5.4 ± 1.3 compared to diabetics with values of 8.53 ± 2.1. The values of HbA1c among diabetics were significantly higher than that of the control group ( P < .05). HPT had a significant linear relationship with HbA1c among the diabetic subjects ( r = 0.42, P < .05).
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Affiliation(s)
- Benjamin Effiong Udoh
- Department of Radiography and Radiological Science, Faculty of Allied Medical Sciences, University of Calabar, Calabar, Cross River State, Nigeria
| | - Bassey Eyo Archibong
- Department of Radiography and Radiological Science, Faculty of Allied Medical Sciences, University of Calabar, Calabar, Cross River State, Nigeria
| | - Akpama Egwu Egong
- Department of Radiography and Radiological Science, Faculty of Allied Medical Sciences, University of Calabar, Calabar, Cross River State, Nigeria
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95
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Zhang T, Qi Z, Wang H, Ding S. Adeno-Associated Virus-Mediated Knockdown of SLC16A11 Improves Glucose Tolerance and Hepatic Insulin Signaling in High Fat Diet-Fed Mice. Exp Clin Endocrinol Diabetes 2019; 129:104-111. [PMID: 31185508 DOI: 10.1055/a-0840-3330] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND SLC16A11, a member of the SLC16 family, is associated with lipid metabolism, causing increased intracellular triacylglycerol (TAG) levels. In the current study, our primary goal was to determine if an SLC16A11 knockdown would improve glucose tolerance and hepatic insulin signaling in high fat diet (HFD)-fed mice. Additionally, the mechanism for exercise-improved insulin sensitivity remains unclear, and there is no mechanistic insight into SLC16A11's role in insulin sensitivity under exercise stress. Therefore, we also examined the impact of endurance exercise on the abundance of SLC16A11. METHODS C57BL/6 J male mice were fed either regular chow (Control) or HFD for 8 weeks and then injected with adeno-associated virus (AAV). Plasma parameters, tissue lipid contents, glucose tolerance, and expression profiles of hepatic insulin signaling were detected. Also, other mice were divided randomly into sedentary and exercise groups. We assessed hepatic expression of SLC16A11 after 8 weeks of endurance exercise. RESULTS 1) Hepatic SLC16A11 expression was greater in HFD-fed mice compared to Control mice. 2) AAV-mediated knockdown of SLC16A11 improved glucose tolerance, prevented TAG accumulation in serum and liver, and increased phosphorylation of protein kinase B (Akt) and glycogen synthesis kinase-3β (GSK3β) in HFD-fed mice. 3) Endurance exercise decreased hepatic SLC16A11 expression. CONCLUSIONS Inactivation of SLC16A11, which is robustly induced by HFD, improved glucose tolerance and hepatic insulin signaling, independent of body weight, but related to TAG. Additionally, SLC16A11 might mediate the health benefits of endurance exercise.
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Affiliation(s)
- Tan Zhang
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai, China.,College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Zhengtang Qi
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai, China.,College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Haiyan Wang
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai, China.,College of Physical Education and Health, East China Normal University, Shanghai, China
| | - Shuzhe Ding
- Key Laboratory of Adolescent Health Assessment and Exercise Intervention, Ministry of Education, East China Normal University, Shanghai, China.,College of Physical Education and Health, East China Normal University, Shanghai, China
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96
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El Sheikh WM, Alahmar IE, Salem GM, El-Sheikh MA. Tumor necrosis factor alpha in peripheral neuropathy in type 2 diabetes mellitus. THE EGYPTIAN JOURNAL OF NEUROLOGY, PSYCHIATRY AND NEUROSURGERY 2019. [DOI: 10.1186/s41983-019-0080-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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97
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Ren N, Kim E, Li B, Pan H, Tong T, Yang CS, Tu Y. Flavonoids Alleviating Insulin Resistance through Inhibition of Inflammatory Signaling. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:5361-5373. [PMID: 30612424 DOI: 10.1021/acs.jafc.8b05348] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During the past 20 years, many studies have focused on polyphenol compounds for their potential beneficial health effects. Flavonoids represent a large class of phenolic compounds found in fruits, vegetables, nuts, grains, cocoa, tea, and other beverages. Flavonoids have shown antioxidant and anti-inflammatory activities. Given the putative relationship between inflammation and insulin resistance, the consumption of flavonoids or flavonoid-rich foods has been suggested to reduce the risk of diabetes by targeting inflammatory signals. This is the first comprehensive review summarizing the current research progress on the inhibition of inflammation and alleviation of insulin resistance by flavonoids as well as the mechanistic link between these disorders. Laboratory and human studies on the activities of major flavonoids (flavones, isoflavones, flavonols, etc.) are discussed.
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Affiliation(s)
- Ning Ren
- Department of Tea Science , Zhejiang University , Hangzhou , Zhejiang 310058 , People's Republic of China
| | - Eunhye Kim
- Department of Tea Science , Zhejiang University , Hangzhou , Zhejiang 310058 , People's Republic of China
| | - Bo Li
- Department of Tea Science , Zhejiang University , Hangzhou , Zhejiang 310058 , People's Republic of China
| | - Haibo Pan
- Department of Tea Science , Zhejiang University , Hangzhou , Zhejiang 310058 , People's Republic of China
| | - Tuantuan Tong
- Department of Tea Science , Zhejiang University , Hangzhou , Zhejiang 310058 , People's Republic of China
| | - Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Youying Tu
- Department of Tea Science , Zhejiang University , Hangzhou , Zhejiang 310058 , People's Republic of China
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98
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Matsumoto C, Koike A, Tanaka R, Fujimori K. A Limonoid, 7-Deacetoxy-7-Oxogedunin (CG-1) from Andiroba ( Carapa guianensis, Meliaceae) Lowers the Accumulation of Intracellular Lipids in Adipocytes via Suppression of IRS-1/Akt-Mediated Glucose Uptake and a Decrease in GLUT4 Expression. Molecules 2019; 24:molecules24091668. [PMID: 31035366 PMCID: PMC6540142 DOI: 10.3390/molecules24091668] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 04/25/2019] [Accepted: 04/26/2019] [Indexed: 01/28/2023] Open
Abstract
Limonoids are phytochemicals with a variety of biological properties. In the present study, we elucidated the molecular mechanism of suppression of adipogenesis in adipocytes by a limonoid, 7-deacetoxy-7-oxogedunin (CG-1) from Carapa guianensis (Meliaceae), known as andiroba. CG-1 reduced the accumulation of intracellular triglycerides in a concentration-dependent manner. The expression levels of the adipogenic, lipogenic, and lipolytic genes were decreased by CG-1 treatment, whereas the glycerol release level was not affected. When CG-1 was added into the medium during days 0-2 of 6-days-adipogenesis, the accumulation of intracellular lipids and the mRNA levels of the adipogenesis-related genes were decreased. In addition, the phosphorylation level of insulin receptor substrate-1 (IRS-1) and Akt in the early phase of adipocyte differentiation (within 1 day after initiating adipocyte differentiation) was reduced by CG-1. Furthermore, insulin-activated translocation of glucose transporter 4 to the plasma membranes in adipocytes was suppressed by CG-1, followed by decreased glucose uptake into the cells. These results indicate that an andiroba limonoid CG-1 suppressed the accumulation of intracellular lipids in the early phase of adipocyte differentiation through repression of IRS-1/Akt-mediated glucose uptake in adipocytes.
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Affiliation(s)
- Chihiro Matsumoto
- Department of Pathobiochemistry, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan.
| | - Atsushi Koike
- Department of Pathobiochemistry, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan.
| | - Reiko Tanaka
- Department of Medicinal Chemistry, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan.
| | - Ko Fujimori
- Department of Pathobiochemistry, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan.
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Li WD, Xia JR, Lian YS. MiR-15b can target insulin receptor to regulate hepatic insulin signaling in mice. Anim Cells Syst (Seoul) 2019; 23:82-89. [PMID: 30949394 PMCID: PMC6440518 DOI: 10.1080/19768354.2019.1583125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 10/24/2018] [Accepted: 11/11/2018] [Indexed: 02/07/2023] Open
Abstract
Now diabetes is growing to be a health problems globally. However, its specific pathogenesis still needs further exploration. Here we showed that miR-15b was upregulated in the palmitate-induced HepG2 cells and livers of hyperglycemic mice. At the same time, we confirmed that the insulin receptor was a direct target of miR-15b. Then we found that the manipulation of miR-15b expression level could affect the insulin signaling pathway of HepG2 cells and the inhibition of miR-15b in liver of ob/ob mice can improve insulin sensitivity of mice. Furthermore, our study demonstrated that palmitate could upregulate the expression of miR-15b by activating PPARα. Our findings established PPARα-responsive miR-15b as a critical regulator of hepatic insulin signaling, thus serving as a new potential therapeutic target for diabetes.
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Affiliation(s)
- Wei-Dong Li
- Department of Gastroenterology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu Province, People's Republic of China
| | - Jin-Rong Xia
- Department of Gastroenterology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu Province, People's Republic of China
| | - Yan-Shu Lian
- Department of Preventive Medicine, Jiangsu health vacation College, Nanjing, Jiangsu Province, People's Republic of China
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Shrestha S, Singh VK, Sarkar SK, Shanmugasundaram B, Jeevaratnam K, Koner BC. Effect of sub-toxic chlorpyrifos on redox sensitive kinases and insulin signaling in rat L6 myotubes. J Diabetes Metab Disord 2019; 17:325-332. [PMID: 30918868 DOI: 10.1007/s40200-018-0379-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 11/20/2018] [Indexed: 12/14/2022]
Abstract
Objectives Sub-chronic exposures to chlorpyrifos, an organophosphorus pesticide is associated with incidence of diabetes mellitus. Biochemical basis of chlorpyrifos-induced diabetes mellitus is not known. Hence, effect of its sub-toxic exposure on redox sensitive kinases, insulin signaling and insulin-induced glucose uptake were assessed in rat muscle cell line. Methods In an in vitro study, rat myoblasts (L6) cell line were differentiated to myotubes and then were exposed to sub-toxic concentrations (6 mg/L and 12 mg/L) of chlorpyrifos for 18 h. Then total anti-oxidant level in myotubes was measured and insulin-stimulated glucose uptake was assayed. Assessment of activation of NFκB & p38MAPK and insulin signaling following insulin stimulation from tyrosine phosphorylation of insulin receptor substrate-1 (IRS-1) and serine phosphorylation of Akt were done in myotubes after chlorpyrifos exposure by western blot (WB) and compared with those in vehicle-treated controls. Results The glucose uptake and total antioxidant level in L6-derived myotubes after sub-toxic exposure to chlorpyrifos were decreased in a dose-dependent manner. As measured from band density of WB, phosphorylation levels increased for redo-sensitive kinases (p38MAPK and IκBα component of NFκB) and decreased for IRS-1 (at tyrosine 1222) and Akt (at serine 473) on insulin stimulation following chlorpyrifos exposure as compared to those in controls. Conclusion We conclude that sub-toxic chlorpyrifos exposure induces oxidative stress in muscle cells activating redox sensitive kinases that impairs insulin signaling and thereby insulin-stimulated glucose uptake in muscle cells. This probably explains the biochemical basis of chlorpyrifos-induced insulin resistance state and diabetes mellitus.
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Affiliation(s)
- Shrijana Shrestha
- 1Department of Biochemistry, Maulana Azad Medical College, 2 Bahadur Shah Zafar Marg, New Delhi, PIN 110002 India
| | - Vijay Kumar Singh
- 1Department of Biochemistry, Maulana Azad Medical College, 2 Bahadur Shah Zafar Marg, New Delhi, PIN 110002 India
| | - Sajib Kumar Sarkar
- 1Department of Biochemistry, Maulana Azad Medical College, 2 Bahadur Shah Zafar Marg, New Delhi, PIN 110002 India
| | | | - Kadirvelu Jeevaratnam
- 2Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, 605014 India
| | - Bidhan Chandra Koner
- 1Department of Biochemistry, Maulana Azad Medical College, 2 Bahadur Shah Zafar Marg, New Delhi, PIN 110002 India
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