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The dysfunction of mGluRIIs is involved in the disorder of hippocampal neural network in diabetic mice model. Exp Brain Res 2022; 240:2491-2498. [PMID: 35994067 DOI: 10.1007/s00221-022-06433-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 08/02/2022] [Indexed: 11/04/2022]
Abstract
Cognitive dysfunction is a high incidence of diabetes mellitus (DM). However, the relationship between DM-induced cognitive defect and neuronal network oscillations is still unknown. In this study, adult male C57BL/6 J mice were intraperitoneally injected with streptozotocin (STZ) to duplicate DM. After 12 weeks, local field potentials were recorded in the perforant fiber pathway (PP) and dentate gyrus (DG) regions. Data showed that mice in the STZ group exhibited impairment of spatial learning and memory by the Morris Water Maze test. The low gamma (LG) and high gamma (HG) power were increased in the PP and DG areas of the STZ group. Moreover, the phase synchronization and the information flow at theta and LG rhythms between the PP and DG areas were decreased, and the theta-LG phase-amplitude coupling strength was markedly reduced in the PP region, DG region, and the PP-DG pathway in the STZ group. Additionally, the concentration of glutamate was increased by the high-performance liquid chromatography. Moreover, the NR2B and PSD95 expressions were markedly reduced, and the Akt/GSK-3β pathway was inhibited. Interestingly, the expressions of mGluRIIs (mGluR2 and mGluR3) were significantly decreased. The reduction of mGluRIIs may limit their function, such as restricting presynaptic glutamate release and reversing the dysfunction of NR2B via Akt/GSK-3β signaling pathway. In conclusion, our data suggest that DM alters the hippocampal neural network partly related to the dysfunction of mGluRIIs.
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Ren T, Zhu Y, Kan J. Zanthoxylum alkylamides activate phosphorylated AMPK and ameliorate glycolipid metabolism in the streptozotocin-induced diabetic rats. Clin Exp Hypertens 2017; 39:330-338. [DOI: 10.1080/10641963.2016.1259332] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Tingyuan Ren
- College of Food Science, Southwest University, Chongqing, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation, Ministry of Agriculture, Chongqing, China
| | - Yuping Zhu
- Institute of Biological Engineering, Chongqing University, Chongqing, China
| | - Jianquan Kan
- College of Food Science, Southwest University, Chongqing, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation, Ministry of Agriculture, Chongqing, China
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Ren T, Zhu Y, Xia X, Ding Y, Guo J, Kan J. Zanthoxylum alkylamides ameliorate protein metabolism disorder in STZ-induced diabetic rats. J Mol Endocrinol 2017; 58:113-125. [PMID: 28100702 PMCID: PMC5424265 DOI: 10.1530/jme-16-0218] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 01/18/2017] [Indexed: 12/26/2022]
Abstract
This study aimed to evaluate the protein metabolism effect of Zanthoxylum alkylamides and to explore the potential mechanism in streptozotocin (STZ)-induced diabetic rats. Diabetic rats were orally treated with 2, 4 and 8 mg per kg bw of alkylamides daily for 28 days. Alkylamides decreased the relative weight of the liver and food intake, significantly increased the relative skeletal muscle weight and significantly decreased the blood urea nitrogen levels. Insulin, insulin-like growth factor 1, total protein (TP) and albumin (ALB), globular proteins and ALB proteins/globulin protein levels in serum significantly increased. TP, RNA content and RNA/DNA ratio significantly increased in the skeletal muscle of diabetic rats. Real-time quantitative polymerase chain reaction results indicated that alkylamides significantly increased the mRNA expression of insulin receptor (InR), IGF1 and insulin-like growth factor 1 receptor (IGF1R) in the liver and skeletal muscle. Moreover, the mRNA and protein expression levels of PI3K, PKB and mTOR significantly increased, whereas those of atrogin-1, muscle ring finger 1 and FOXO in the skeletal muscle significantly decreased. Alkylamides may advance protein synthesis by the PI3K/PKB/mTOR signalling pathway and attenuate the catabolism of protein through the ubiquitin-proteasome pathway. Therefore, it was possible that alkylamides ameliorate protein metabolism disorders in diabetic rats by activating the mTOR pathway.
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Affiliation(s)
- Tingyuan Ren
- College of Food ScienceSouthwest University, Chongqing, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing)Ministry of Agriculture, Chongqing, China
| | - Yuping Zhu
- Institute of Biological EngineeringChongqing University, Chongqing, China
| | - Xuejuan Xia
- College of Food ScienceSouthwest University, Chongqing, China
| | - Yongbo Ding
- College of Food ScienceSouthwest University, Chongqing, China
| | - Jing Guo
- Department of NutritionDaping Hospital & Research Institute of Surgery, Third Military Medical University, Chongqing, China
| | - Jianquan Kan
- College of Food ScienceSouthwest University, Chongqing, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing)Ministry of Agriculture, Chongqing, China
- Correspondence should be addressed to J Kan;
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Zhao F, Li J, Mo L, Tan M, Zhang T, Tang Y, Zhao Y. Changes in Neurons and Synapses in Hippocampus of Streptozotocin-Induced Type 1 Diabetes Rats: A Stereological Investigation. Anat Rec (Hoboken) 2016; 299:1174-83. [DOI: 10.1002/ar.23344] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/05/2016] [Accepted: 02/11/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Feng Zhao
- Laboratory of Electron Microscopy; North Sichuan Medical College; Nanchong 637007 People's Republic of China
- Department of Histology and Embryology; North Sichuan Medical College; Nanchong 637007 People's Republic of China
| | - Jing Li
- Laboratory of Electron Microscopy; North Sichuan Medical College; Nanchong 637007 People's Republic of China
- Department of Histology and Embryology; North Sichuan Medical College; Nanchong 637007 People's Republic of China
| | - Linlong Mo
- Laboratory of Electron Microscopy; North Sichuan Medical College; Nanchong 637007 People's Republic of China
- Department of Histology and Embryology; North Sichuan Medical College; Nanchong 637007 People's Republic of China
| | - Min Tan
- Laboratory of Electron Microscopy; North Sichuan Medical College; Nanchong 637007 People's Republic of China
- Department of Histology and Embryology; North Sichuan Medical College; Nanchong 637007 People's Republic of China
| | - Ting Zhang
- Laboratory of Electron Microscopy; North Sichuan Medical College; Nanchong 637007 People's Republic of China
- Department of Histology and Embryology; North Sichuan Medical College; Nanchong 637007 People's Republic of China
| | - Yong Tang
- Department of Histology and Embryology; Chongqing Medical University; Chongqing 400016 People's Republic of China
| | - Yuanyu Zhao
- Laboratory of Electron Microscopy; North Sichuan Medical College; Nanchong 637007 People's Republic of China
- Department of Histology and Embryology; North Sichuan Medical College; Nanchong 637007 People's Republic of China
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Zheng Y, Yang Y, Dong B, Zheng H, Lin X, Du Y, Li X, Zhao L, Gao H. Metabonomic profiles delineate potential role of glutamate-glutamine cycle in db/db mice with diabetes-associated cognitive decline. Mol Brain 2016; 9:40. [PMID: 27090642 PMCID: PMC4835835 DOI: 10.1186/s13041-016-0223-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 04/11/2016] [Indexed: 12/02/2022] Open
Abstract
Background Diabetes-associated cognition decline is one of central nervous system complications in diabetic mellitus, while its pathogenic mechanism remains unclear. In this study, 1H nuclear magnetic resonance-based metabonomics and immunohistochemistry was used to explore key metabolic alterations in hippocampus of type 2 diabetic db/db mice with cognition decline in order to advance understanding of mechanisms underlying the pathogenesis of the disease. Results Metabonomics reveals that lactate level was significantly increased in hippocampus of db/db mice with cognition decline compared with age-matched wild-type mice. Several tricarboxylic acid cycle intermediates including succinate and citrate were reduced in hippocampus of db/db mice with cognition decline. Moreover, an increase in glutamine level and a decrease in glutamate and γ-aminobutyric acid levels were observed in db/db mice. Results from immunohistochemistry analysis show that glutamine synthetase was increased and glutaminase and glutamate decarboxylase were decreased in db/db mice. Conclusions Our results suggest that the development of diabetes-associated cognition decline in db/db mice is most likely implicated in a reduction in energy metabolism and a disturbance of glutamate-glutamine shuttling between neurons and astrocytes in hippocampus. Electronic supplementary material The online version of this article (doi:10.1186/s13041-016-0223-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yongquan Zheng
- Radiology Department of the First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325027, Zhejiang, China.,School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Yunjun Yang
- Radiology Department of the First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325027, Zhejiang, China
| | - Baijun Dong
- Department of Urology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China
| | - Hong Zheng
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Xiaodong Lin
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Yao Du
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Xiaokun Li
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Liangcai Zhao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China.
| | - Hongchang Gao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China.
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