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Expression and Characterization of a Potent Long-Acting GLP-1 Receptor Like Agonist, Exendin-4-Fc. Int J Pept Res Ther 2021. [DOI: 10.1007/s10989-021-10269-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractHuman GLP-1 (glucagon-like peptide-1) can produce a remarkable improvement in glycemic control in patients with type 2 diabetes. However, its clinical benefits are limited by its short half-life, which is less than 2 min because of its small size and rapid enzymatic inactivation by dipeptidyl peptidase IV. We engineered Exendin-4-Fc, a 66-kDa fusion protein by linking an IgG2 Fc to Exendin-4. A stably transfected Chinese hamster ovary cell line was obtained using electroporation. Exendin-4-Fc stimulated insulin secretion in INS-1 cells in a dose- and glucose-dependent manner and increased insulin mRNA expression. The plasma half-life of Exendin-4-Fc in cynomolgus monkeys was approximately 133.92 ± 25.1 h. In the KKAy mouse model of diabetes, one intraperitoneal injection of Exendin-4-Fc (1 mg/kg) reduced blood glucose levels for 5 days. A 4-week repeat-administration study identified sustained effects on blood glucose levels. Oral glucose tolerance tests conducted at the beginning and end of this 4-week period showed that Exendin-4-Fc produced a stable glucose lowering effect. In addition, KKAy mice treated with Exendin-4-Fc showed statistically significant weight loss from day 23. In conclusion, these properties of Exendin-4-Fc demonstrated that it could be a potential long-acting GLP-1 receptor agonist for the treatment of type 2 diabetes.
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2
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Huan Y, Jiang Q, Li G, Bai G, Zhou T, Liu S, Li C, Liu Q, Sun S, Yang M, Guo N, Wang X, Wang S, Liu Y, Wang G, Huang H, Shen Z. The dual DPP4 inhibitor and GPR119 agonist HBK001 regulates glycemic control and beta cell function ex and in vivo. Sci Rep 2017; 7:4351. [PMID: 28659588 PMCID: PMC5489512 DOI: 10.1038/s41598-017-04633-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 05/18/2017] [Indexed: 02/08/2023] Open
Abstract
Glucagon like peptide-1 (GLP-1) plays a vital role in glucose homeostasis and sustaining β-cell function. Currently there are two major methods to enhance endogenous GLP-1 activity; inhibiting dipeptidyl peptidase-4 (DPP4) or activating G protein-coupled receptor 119 (GPR119). Here we describe and validate a novel dual-target compound, HBK001, which can both inhibit DPP4 and activate GPR119 ex and in vivo. We show that HBK001 can promote glucose-stimulated insulin secretion in mouse and human primary islets. A single administration of HBK001 in ICR mice can increase plasma incretins levels much more efficiently than linagliptin, a classic DPP4 inhibitor. Long-term treatment of HBK001 in KKAy mice can ameliorate hyperglycemia as well as improve glucose tolerance, while linagliptin fails to achieve such glucose-lowing effects despite inhibiting 95% of serum DPP4 activity. Moreover, HBK001 can increase first-phase insulin secretion in KKAy mice, suggesting a direct effect on islet β-cells via GPR119 activation. Furthermore, HBK001 can improve islet morphology, increase β-cell proliferation and up-regulate genes involved in improved β-cell function. Thus, we have identified, designed and synthesized a novel dual-target compound, HBK001, which represents a promising therapeutic candidate for type 2 diabetes, especially for patients who are insensitive to current DPP4 inhibitors.
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Affiliation(s)
- Yi Huan
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Qian Jiang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Gang Li
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Guoliang Bai
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Tian Zhou
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shuainan Liu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Caina Li
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Quan Liu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Sujuan Sun
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Miaomiao Yang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Nan Guo
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xing Wang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shusen Wang
- Organ Transplant Center, Tianjin First Center Hospital, Tianjin, China.,Key Laboratory for Critical Care Medicine of the Ministry of Health, Tianjin First Center Hospital, Tianjin, China
| | - Yaojuan Liu
- Organ Transplant Center, Tianjin First Center Hospital, Tianjin, China.,Key Laboratory for Critical Care Medicine of the Ministry of Health, Tianjin First Center Hospital, Tianjin, China
| | - Guanqiao Wang
- Organ Transplant Center, Tianjin First Center Hospital, Tianjin, China.,Key Laboratory for Critical Care Medicine of the Ministry of Health, Tianjin First Center Hospital, Tianjin, China
| | - Haihong Huang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - Zhufang Shen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
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A mechanistic study to increase understanding of titanium dioxide nanoparticles-increased plasma glucose in mice. Food Chem Toxicol 2016; 95:175-87. [DOI: 10.1016/j.fct.2016.07.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 07/01/2016] [Accepted: 07/12/2016] [Indexed: 12/31/2022]
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4
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Yang Y, Chen F, Wan D, Liu Y, Yang L, Feng H, Cui X, Gao X, Song H. Expression and Characterization of a Potent Long-Acting GLP-1 Receptor Agonist, GLP-1-IgG2σ-Fc. PLoS One 2016; 11:e0156449. [PMID: 27232339 PMCID: PMC4883776 DOI: 10.1371/journal.pone.0156449] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 05/13/2016] [Indexed: 01/13/2023] Open
Abstract
Human GLP-1 (glucagon-like peptide-1) can produce a remarkable improvement in glycemic control in patients with type 2 diabetes. However, its clinical benefits are limited by its short half-life, which is less than 2 min because of its small size and rapid enzymatic inactivation by dipeptidyl peptidase IV. We engineered GLP-1-IgG2σ-Fc, a 68-kDa fusion protein linking a variant human GLP-1 (A8G/G26E/R36G) to a human IgG2σ constant heavy-chain. A stably transfected Chinese hamster ovary cell line was obtained using electroporation. Western blotting showed that the expressed protein was immunoreactive to both GLP-1 and IgG antibodies. GLP-1-IgG2σ-Fc stimulated insulin secretion from INS-1 cells in a dose- and glucose-dependent manner and increased insulin mRNA expression. The half-life of GLP-1-IgG2σ-Fc in cynomolgus monkeys was approximately 57.1 ± 4.5 h. In the KKAy mouse model of diabetes, one intraperitoneal injection of GLP-1-IgG2σ-Fc (1 mg/kg) reduced blood glucose levels for 5 days. A 4-week repeat-administration study identified sustained effects on blood glucose levels. Oral glucose tolerance tests conducted at the beginning and end of this 4-week period showed that GLP-1-IgG2σ-Fc produced a stable glucose lowering effect. In addition, KKAy mice treated with GLP-1-IgG2σ-Fc showed statistically significant weight loss from day 23. In conclusion, these properties of GLP-1-IgG2σ-Fc demonstrated that it represented a potential long-acting GLP-1 receptor agonist for the treatment of type 2 diabetes.
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Affiliation(s)
- Yi Yang
- Anhui Medical University, Hefei, Anhui, China
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
| | - Fang Chen
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
| | - Deyou Wan
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
| | - Yunhui Liu
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
| | - Li Yang
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
| | - Hongru Feng
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
| | - Xinling Cui
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
| | - Xin Gao
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
- * E-mail: (HS); (XG)
| | - Haifeng Song
- Anhui Medical University, Hefei, Anhui, China
- Research Center of Pharmacokinetics, Academy of Military Medical Sciences, Beijing, China
- * E-mail: (HS); (XG)
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Wang J, Hu S, Wang J, Li S, Jiang W. Fucoidan from Acaudina molpadioides protects pancreatic islet against cell apoptosis via inhibition of inflammation in type 2 diabetic mice. Food Sci Biotechnol 2016; 25:293-300. [PMID: 30263270 DOI: 10.1007/s10068-016-0042-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 10/15/2015] [Accepted: 10/22/2015] [Indexed: 12/20/2022] Open
Abstract
Inflammation induces pancreatic islet cell apoptosis. Effects of fucoidan from Acaudina molpadioides (Am-FUC) on inhibition of pancreatic islet cell apoptosis and inflammation in type 2 diabetic mice were investigated. Am-FUC repaired pancreatic islet cells, decreased serum C-reactive protein (CRP), macrophage inflammatory protein 1 (MIP-1), interleukin 1β (IL-1β), IL-6, and tumor necrosis factor-α (TNF-α) levels, and increased the IL-10 level. Am-FUC also reduced TNF-α, CRP, MIP-1, IL-1β, and IL-6 mRNA expressions, and increased IL-10 mRNA expression in epididymal adipose tissues. Am-FUC reduced Bid, Bax, cytochrome c, caspase 9, and caspase 3 mRNA expressions, and increased Bcl-2 and Bcl-xL mRNA expressions. Am-FUC down-regulated t-Bid, Bax, cytochrome c, and caspase 9 activities, cleaved caspase 3 proteins, and up-regulated Bcl-2 and Bcl-xL proteins. Thus, an Am-FUCblocked mitochondrial pathway was the suppression mechanism in pancreatic islet cell apoptosis via regulation of inflammatory cytokines providing dietary intervention in type 2 diabetes and inflammation-induced pancreatic islet apoptosis.
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Affiliation(s)
- Jinhui Wang
- 1Innovation Application Institute, Zhejiang Ocean University, Zhoushan, 316022 China
| | - Shiwei Hu
- 1Innovation Application Institute, Zhejiang Ocean University, Zhoushan, 316022 China.,2College of Food Science and Engineering, Ocean University of China, Qingdao, 266003 China
| | - Jingfeng Wang
- 2College of Food Science and Engineering, Ocean University of China, Qingdao, 266003 China
| | - Shijie Li
- 1Innovation Application Institute, Zhejiang Ocean University, Zhoushan, 316022 China
| | - Wei Jiang
- 1Innovation Application Institute, Zhejiang Ocean University, Zhoushan, 316022 China.,2College of Food Science and Engineering, Ocean University of China, Qingdao, 266003 China
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Hu S, Li S, Song W, Ji L, Cai L, Wang Y, Jiang W. Fucoidan from Cucumaria frondosa Inhibits Pancreatic Islets Apoptosis Through Mitochondrial Signaling Pathway in Insulin Resistant Mice. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2016. [DOI: 10.3136/fstr.22.507] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Shiwei Hu
- Innovation and Application Institute, Zhejiang Ocean University, Zhoushan
| | - Shijie Li
- Innovation and Application Institute, Zhejiang Ocean University, Zhoushan
| | - Wendong Song
- Innovation and Application Institute, Zhejiang Ocean University, Zhoushan
| | - Lili Ji
- Innovation and Application Institute, Zhejiang Ocean University, Zhoushan
| | - Lu Cai
- Innovation and Application Institute, Zhejiang Ocean University, Zhoushan
| | - Yaning Wang
- Innovation and Application Institute, Zhejiang Ocean University, Zhoushan
| | - Wei Jiang
- Innovation and Application Institute, Zhejiang Ocean University, Zhoushan
- Zhejiang Provincial Key Laboratory of Health Risk Factors for Seafood, Zhoushan Municipal Center for Disease Control and Prevention
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Acute intravenous glucose load impairs early insulin secretion and insulin content in islet β cells in mice. Life Sci 2016; 144:148-55. [DOI: 10.1016/j.lfs.2015.12.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 11/14/2015] [Accepted: 12/04/2015] [Indexed: 01/04/2023]
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Fucosylated chondroitin sulfate from sea cucumber inhibited islets of langerhans apoptosis via inactivation of the mitochondrial pathway in insulin resistant mice. Food Sci Biotechnol 2015. [DOI: 10.1007/s10068-015-0141-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Hu H, Guo Q, Wang C, Ma X, He H, Oh Y, Feng Y, Wu Q, Gu N. Titanium dioxide nanoparticles increase plasma glucose via reactive oxygen species-induced insulin resistance in mice. J Appl Toxicol 2015; 35:1122-32. [PMID: 25826740 DOI: 10.1002/jat.3150] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 02/11/2015] [Accepted: 02/15/2015] [Indexed: 12/20/2022]
Abstract
There have been few reports about the possible toxic effects of titanium dioxide (TiO2 ) nanoparticles on the endocrine system. We explored the endocrine effects of oral administration to mice of anatase TiO2 nanoparticles (0, 64 and 320 mg kg(-1) body weight per day to control, low-dose and high-dose groups, respectively, 7 days per week for 14 weeks). TiO2 nanoparticles were characterized by scanning and transmission electron microscopy (TEM) and dynamic light scattering (DLS), and their physiological distribution was investigated by inductively coupled plasma. Biochemical analyzes included plasma glucose, insulin, heart blood triglycerides (TG), free fatty acid (FFA), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), total cholesterol (TC), tumor necrosis factor-alpha (TNF-α), interleukin (IL)-6 and reactive oxygen species (ROS)-related markers (total SOD, GSH and MDA). Phosphorylation of IRS1, Akt, JNK1, and p38 MAPK were analyzed by western blotting. Increased titanium levels were found in the liver, spleen, small intestine, kidney and pancreas. Biochemical analyzes showed that plasma glucose significantly increased whereas there was no difference in plasma insulin secretion. Increased ROS levels were found in serum and the liver, as evidenced by reduced total SOD activity and GSH level and increased MDA content. Western blotting showed that oral administration of TiO2 nanoparticles induced insulin resistance (IR) in mouse liver, shown by increased phosphorylation of IRS1 (Ser307) and reduced phosphorylation of Akt (Ser473). The pathway by which TiO2 nanoparticles increase ROS-induced IR were included in the inflammatory response and phosphokinase, as shown by increased serum levels of TNF-α and IL-6 and increased phosphorylation of JNK1 and p38 MAPK in liver. These results show that oral administration of TiO2 nanoparticles increases ROS, resulting in IR and increasing plasma glucose in mice.
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Affiliation(s)
- Hailong Hu
- School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Qian Guo
- School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Changlin Wang
- School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Xiao Ma
- Key Laboratory of Pu-erh Tea Science of Ministry of Education, Yunnan Research Center for Advanced Tea Processing, Yunnan Agricultural University, Kunming, China
| | - Hongjuan He
- School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Yuri Oh
- Faculty of Education, Wakayama University, Wakayama, Japan
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Qiong Wu
- School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Ning Gu
- School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
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Jiang N, Zhang S, Zhu J, Shang J, Gao X. Hypoglycemic, Hypolipidemic and Antioxidant Effects of Peptides from Red Deer Antlers in Streptozotocin-Induced Diabetic Mice. TOHOKU J EXP MED 2015; 236:71-9. [DOI: 10.1620/tjem.236.71] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Ning Jiang
- Department of Biological Science and Technology, Hubei University for Nationalities
- School of Life Science and Technology, China Pharmaceutical University
| | - Shuangjian Zhang
- School of Life Science and Technology, China Pharmaceutical University
| | - Jing Zhu
- School of Life Science and Technology, China Pharmaceutical University
| | - Jing Shang
- New Drug Screening Center, China Pharmaceutical University
| | - Xiangdong Gao
- School of Life Science and Technology, China Pharmaceutical University
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Hu S, Wang J, Xu H, Wang Y, Li Z, Xue C. Fucosylated chondroitin sulphate from sea cucumber inhibits high-fat-sucrose diet-induced apoptosis in mouse pancreatic islets via down-regulating mitochondrial signaling pathway. J Funct Foods 2014. [DOI: 10.1016/j.jff.2014.01.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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12
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Li Y, Xiao J, Tian H, Pei Y, Lu Y, Han X, Liu Y, Zhong W, Sun B, Fang F, Shu H. The DPP-4 inhibitor MK0626 and exercise protect islet function in early pre-diabetic kkay mice. Peptides 2013; 49:91-9. [PMID: 24025600 DOI: 10.1016/j.peptides.2013.08.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 08/30/2013] [Accepted: 08/30/2013] [Indexed: 12/11/2022]
Abstract
Dipeptidyl peptidase-4 (DPP-4) inhibitor and exercise have proven to be effective treatments for diabetes. However, the effects of these interventions in compensatory hyperinsulinemia prediabetic period are unknown. The purpose of this study was to determine if these interventions have protective effects on β-cell function and preventive effects on the onset of diabetes in prediabetic kkay mice. After 2 weeks of high-fat diet feeding, we treated 7-week-old mice with a normal diet, high-fat diet, exercise training, or the DPP-4 inhibitor for 8 weeks. C57BL/6J mice served as a normal control. Kkay mice without intervention developed diabetes at week 15, but no diabetic mice were observed in the DPP-4I or exercise groups as well as the normal control group. The DPP-4I and exercise groups showed improved body weight, blood glucose level, glucose tolerance, insulin sensitivity, islet area, and islet morphology. In addition, the proportion of Ki67-positive β-cells in the treatment groups was obviously higher than that in the untreated groups. MafA (V-maf musculoaponeurotic fibrosarcoma oncogene homolog A) expression in the treated groups increased markedly. However PDX-1 (pancreatic and duodenal homeobox-1) expression did not differ significantly among the groups. The results show that exercise and DPP-4I treatment conducted during the hyperinsulinemic prediabetic stage contribute to the maintenance of β-cell function and morphology, enhance β-cell proliferation, extend the compensatory insulin hypersecretion period, and delay disease onset. The expression of PDX-1 was not altered significantly during the early stages of diabetes. However, the reduced expression of the insulin transcription factor MafA may play an important role in the development of prediabetes.
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Affiliation(s)
- Yupeng Li
- Tianjin Medical University, Metabolic Diseases Hospital & Tianjin Endocrinology Institute, No. 66, TongAn Road, Heping District, Tianjin, China
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