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Bordet S, Luaces JP, Herrera MI, Gonzalez LM, Kobiec T, Perez-Lloret S, Otero-Losada M, Capani F. Neuroprotection from protein misfolding in cerebral hypoperfusion concurrent with metabolic syndrome. A translational perspective. Front Neurosci 2023; 17:1215041. [PMID: 37650104 PMCID: PMC10463751 DOI: 10.3389/fnins.2023.1215041] [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: 05/01/2023] [Accepted: 07/17/2023] [Indexed: 09/01/2023] Open
Abstract
Based on clinical and experimental evidence, metabolic syndrome (MetS) and type 2 diabetes (T2D) are considered risk factors for chronic cerebral hypoperfusion (CCH) and neurodegeneration. Scientific evidence suggests that protein misfolding is a potential mechanism that explains how CCH can lead to either Alzheimer's disease (AD) or vascular cognitive impairment and dementia (VCID). Over the last decade, there has been a significant increase in the number of experimental studies regarding this issue. Using several animal paradigms and different markers of CCH, scientists have discussed the extent to which MetSor T2D causes a decrease in cerebral blood flow (CBF). In addition, different models of CCH have explored how long-term reductions in oxygen and energy supply can trigger AD or VCID via protein misfolding and aggregation. Research that combines two or three animal models could broaden knowledge of the links between these pathological conditions. Recent experimental studies suggest novel neuroprotective properties of protein-remodeling factors. In this review, we present a summarized updated revision of preclinical findings, discussing clinical implications and proposing new experimental approaches from a translational perspective. We are confident that research studies, both clinical and experimental, may find new diagnostic and therapeutic tools to prevent neurodegeneration associated with MetS, diabetes, and any other chronic non-communicable disease (NCD) associated with diet and lifestyle risk factors.
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Affiliation(s)
- Sofía Bordet
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, CAECIHS, UAI-CONICET, Buenos Aires, Argentina
- Centro de Investigaciones en Psicología y Psicopedagogía (CIPP), Facultad de Psicología y Psicopedagogía, Pontificia Universidad Católica Argentina (UCA), Buenos Aires, Argentina
| | - Juan Pablo Luaces
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, CAECIHS, UAI-CONICET, Buenos Aires, Argentina
| | - Maria Ines Herrera
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, CAECIHS, UAI-CONICET, Buenos Aires, Argentina
- Centro de Investigaciones en Psicología y Psicopedagogía (CIPP), Facultad de Psicología y Psicopedagogía, Pontificia Universidad Católica Argentina (UCA), Buenos Aires, Argentina
| | - Liliana Mirta Gonzalez
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, CAECIHS, UAI-CONICET, Buenos Aires, Argentina
| | - Tamara Kobiec
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, CAECIHS, UAI-CONICET, Buenos Aires, Argentina
- Centro de Investigaciones en Psicología y Psicopedagogía (CIPP), Facultad de Psicología y Psicopedagogía, Pontificia Universidad Católica Argentina (UCA), Buenos Aires, Argentina
| | - Santiago Perez-Lloret
- Departamento de Fisiología, Facultad de Medicina, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
- Observatorio de Salud Pública, Pontificia Universidad Católica Argentina, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Matilde Otero-Losada
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, CAECIHS, UAI-CONICET, Buenos Aires, Argentina
| | - Francisco Capani
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana, Consejo Nacional de Investigaciones Científicas y Técnicas, CAECIHS, UAI-CONICET, Buenos Aires, Argentina
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago, Chile
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Othman MA, Fadel R, Tayem Y, Jaradat A, Rashid A, Fatima A, Al-Mahameed AE, Nasr El-Din WA. Caffeine protects against hippocampal alterations in type 2 diabetic rats via modulation of gliosis, inflammation and apoptosis. Cell Tissue Res 2022; 392:443-466. [PMID: 36577880 DOI: 10.1007/s00441-022-03735-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 12/21/2022] [Indexed: 12/30/2022]
Abstract
Type 2 diabetes (T2D) is implicated in the injury of several organs, including the brain resulting in neuronal damage, which may lead to cognitive impairment and dementia. Additionally, it is linked to inflammation, cytokine release, apoptosis and various degenerative conditions. Astrocytes and microglia might have a role in mediating these processes. Caffeine, a psychoactive beverage, has been shown to reduce the risk of cognitive and memory impairment. This study proposes anti-inflammatory and anti-apoptotic role of caffeine, which can be mediated via microglia/astrocyte activation and overexpression of pro-inflammatory molecules. T2D was induced in rats by feeding with high fat high sugar diet and injecting a single low dose streptozotocin (STZ) intraperitoneally. Other diabetic rats were given caffeine orally (in two doses) for 5 weeks, starting 1 week before STZ injection. Measurement of plasma cytokines, TNFα and IL6, was performed using enzyme-linked immunosorbent assay (ELISA) technique. After sacrificing animals, brains were obtained and processed for histological evaluation. Immunohistochemistry was also performed using the following primary antibodies, anti-astrocyte marker GFAP, anti-microglia marker CD11b and apoptotic marker (anti-cleaved caspase-3). There was upregulation of IL6 and TNF-α in diabetic rats. Additionally, histological evaluation of the hippocampus of diabetic rats revealed cellular degeneration. There was increased immunostaining of GFAP, CD11b and cleaved caspase-3 in diabetic rats. Pretreatment with caffeine to diabetic rats, resulted in improvement of structural changes and decrease in cytokine levels and immuno-markers, expression, and this was in a dose-dependent manner. In conclusion, caffeine had an ameliorative role in enhancing hippocampal degenerative changes in T2D.
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Affiliation(s)
- Manal A Othman
- Department of Anatomy, College of Medicine and Medical Sciences, Arabian Gulf University, P.O. Box 26671, Manama, Bahrain
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Raouf Fadel
- Department of Anatomy, College of Medicine and Medical Sciences, Arabian Gulf University, P.O. Box 26671, Manama, Bahrain
- Department of Human Anatomy and Embryology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Yasin Tayem
- Department of Pharmacology, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Ahmed Jaradat
- Department of Family and Community Medicine, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Aisha Rashid
- Department of Anatomy, College of Medicine and Medical Sciences, Arabian Gulf University, P.O. Box 26671, Manama, Bahrain
| | - Ayesha Fatima
- Department of Anatomy, College of Medicine and Medical Sciences, Arabian Gulf University, P.O. Box 26671, Manama, Bahrain
| | - Ali E Al-Mahameed
- Department of Microbiology, Immunology & Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Wael Amin Nasr El-Din
- Department of Anatomy, College of Medicine and Medical Sciences, Arabian Gulf University, P.O. Box 26671, Manama, Bahrain.
- Department of Human Anatomy and Embryology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt.
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Yin YL, Liu YH, Zhu ML, Wang HH, Qiu Y, Wan GR, Li P. Floralozone improves cognitive impairment in vascular dementia rats via regulation of TRPM2 and NMDAR signaling pathway. Physiol Behav 2022; 249:113777. [PMID: 35276121 DOI: 10.1016/j.physbeh.2022.113777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 02/23/2022] [Accepted: 03/07/2022] [Indexed: 12/11/2022]
Abstract
Vascular dementia (VD) is the second largest type of dementia after Alzheimer's disease. At present, the pathogenesis is complex and there is no effective treatment. Floralozone has been shown to reduce atherosclerosis in rats caused by a high-fat diet. However, whether it plays a role in VD remains elusive. In the present study, the protective activities and relevant mechanisms of Floralozone were evaluated in rats with cognitive impairment, which were induced by bilateral occlusion of the common carotid arteries (BCCAO) in rats. Cognitive function, pathological changes and oxidative stress condition in the brains of VD rats were assessed using Neurobehavioral tests, Morris water maze tests, hematoxylin-eosin staining, Neu N staining, TUNEL staining, Golgi staining, Western blot assay and antioxidant assays (MDA, SOD, GSH), respectively. The results indicated that VD model was established successfully and BCCAO caused a decline in spatial learning and memory and hippocampal histopathological abnormalities of rats. Floralozone (50, 100, 150 mg/kg) dose-dependently alleviated the pathological changes, decreased oxidative stress injury, which eventually reduced cognitive impairment in BCCAO rats. The same results were shown in further experiments with neurobehavioral tests. At the molecular biological level, Floralozone decreased the protein level of transient receptor potential melastatin-related 2 (TRPM2) in VD and normal rats, and increased the protein level of NR2B in hippocampus of N-methyl-D-aspartate receptor (NMDAR). Notably, Floralozone could markedly improved learning and memory function of BCCAO rats in Morris water maze (MWM) and improved neuronal cell loss, synaptic structural plasticity. In conclusion, Floralozone has therapeutic potential for VD, increased synaptic structural plasticity and alleviating neuronal cell apoptosis, which may be related to the TRPM2/NMDAR pathway.
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Affiliation(s)
- Ya-Ling Yin
- School of Basic Medical Sciences, Department of Physiology and Pathophysiology, Sino-UK Joint Laboratory of Brain Function and Injury and Department of Physiology and Neurobiology, Xinxiang Medical University,Xinxiang, China, 453003; College of Pharmacy, Henan international joint laboratory of cardiovascular remodeling and drug intervention, Xinxiang key laboratory of vascular remodeling intervention and molecular targeted therapy drug development, Xinxiang Medical University,Xinxiang, China, 453003.
| | - Yan-Hua Liu
- College of Pharmacy, Henan international joint laboratory of cardiovascular remodeling and drug intervention, Xinxiang key laboratory of vascular remodeling intervention and molecular targeted therapy drug development, Xinxiang Medical University,Xinxiang, China, 453003.
| | - Mo-Li Zhu
- College of Pharmacy, Henan international joint laboratory of cardiovascular remodeling and drug intervention, Xinxiang key laboratory of vascular remodeling intervention and molecular targeted therapy drug development, Xinxiang Medical University,Xinxiang, China, 453003.
| | - Huan-Huan Wang
- College of Pharmacy, Henan international joint laboratory of cardiovascular remodeling and drug intervention, Xinxiang key laboratory of vascular remodeling intervention and molecular targeted therapy drug development, Xinxiang Medical University,Xinxiang, China, 453003.
| | - Yue Qiu
- College of Pharmacy, Henan international joint laboratory of cardiovascular remodeling and drug intervention, Xinxiang key laboratory of vascular remodeling intervention and molecular targeted therapy drug development, Xinxiang Medical University,Xinxiang, China, 453003.
| | - Guang-Rui Wan
- College of Pharmacy, Henan international joint laboratory of cardiovascular remodeling and drug intervention, Xinxiang key laboratory of vascular remodeling intervention and molecular targeted therapy drug development, Xinxiang Medical University,Xinxiang, China, 453003.
| | - Peng Li
- School of Basic Medical Sciences, Department of Physiology and Pathophysiology, Sino-UK Joint Laboratory of Brain Function and Injury and Department of Physiology and Neurobiology, Xinxiang Medical University,Xinxiang, China, 453003; College of Pharmacy, Henan international joint laboratory of cardiovascular remodeling and drug intervention, Xinxiang key laboratory of vascular remodeling intervention and molecular targeted therapy drug development, Xinxiang Medical University,Xinxiang, China, 453003.
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Effect of Cinepazide Maleate on Serum Inflammatory Factors of ICU Patients with Severe Cerebral Hemorrhage after Surgery. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:6562140. [PMID: 34745295 PMCID: PMC8568541 DOI: 10.1155/2021/6562140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 10/15/2021] [Indexed: 12/01/2022]
Abstract
Objective To explore the effect of cinepazide maleate on serum inflammatory factors of intensive care unit (ICU) patients with severe cerebral hemorrhage after surgery. Methods 116 ICU patients with severe cerebral hemorrhage treated in Taian Maternal and Child Health Hospital from June 2018 to June 2020 were selected as the research objects and randomly divided into the control group and experimental group, with 58 patients in each group. The control group was given routine treatment, while the experimental group was additionally given an intravenous drip of cinepazide maleate to compare the clinical efficacy and serum inflammatory factors between the two groups. Results The total effective rate in the experimental group was higher than that in the control group (P < 0.05). After treatment, the Glasgow Coma Scale (GCS), National Institutes of Health Stroke Scale (NIHSS), and Fugl-Meyer scores in both groups were better than those before treatment, and the scores in the experimental group were better than those in the control group (P < 0.05). The oxidative stress indexes such as total antioxidant capacity (T-Aoc), superoxide dismutase (SOD), and glutathione peroxidase (GSH-PX) in the experimental group were higher than those in the control group, while malondialdehyde (MDA) in the experimental group was lower than that in the control group (P < 0.05). The high-sensitivity C-reactive protein (hsCRP), interleukin-6 (IL-6), interleukin-8 (IL-8), and tumor necrosis factor-α (TNF-α) levels in the experimental group were lower than those in the control group (P < 0.05). Compared with the control group, the cerebrovascular function in the experimental group was significantly improved (P < 0.05), with statistically significant differences. Conclusion Cinepazide maleate can effectively reduce the serum inflammatory factor levels of ICU patients with severe cerebral hemorrhage after surgery, alleviate the oxidative stress response in the body, and improve the cerebrovascular function and cerebral nerve function, which is worthy of clinical promotion.
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Zheng Y, Zhang J, Zhao Y, Zhang Y, Zhang X, Guan J, Liu Y, Fu J. Curcumin protects against cognitive impairments in a rat model of chronic cerebral hypoperfusion combined with diabetes mellitus by suppressing neuroinflammation, apoptosis, and pyroptosis. Int Immunopharmacol 2021; 93:107422. [PMID: 33548579 DOI: 10.1016/j.intimp.2021.107422] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/12/2021] [Accepted: 01/19/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Chronic cerebral hypoperfusion (CCH) is regarded as a high-risk factor for cognitive decline in vascular dementia (VaD). We have previously shown that diabetes mellitus (DM) synergistically promotes CCH-induced cognitive dysfunction via exacerbating neuroinflammation. Furthermore, curcumin has been shown to exhibit anti-inflammatory and neuroprotective activities. However, the effects of curcumin on CCH-induced cognitive impairments in DM have remained unknown. METHODS Rats were fed with a high-fat diet (HFD) and injected with low-dose streptozotocin (STZ), followed by bilateral common carotid artery occlusion (BCCAO), to model DM and CCH in vivo. After BCCAO, curcumin (50 mg/kg) was administered intraperitoneally every two days for eight weeks to evaluate its therapeutic effects. Additionally, mouse BV2 microglial cells were exposed to hypoxia and high glucose to model CCH and DM pathologies in vitro. RESULTS Curcumin treatment significantly improved DM/CCH-induced cognitive deficits and attenuated neuronal cell death. Molecular analysis revealed that curcumin exerted protective effects via suppressing neuroinflammation induced by microglial activation, regulating the triggering receptor expressed on myeloid cells 2 (TREM2)/toll-like receptor 4 (TLR4)/nuclear factor-κB (NF-κB) pathway, alleviating apoptosis, and reducing nod-like receptor protein 3 (NLRP3)-dependent pyroptosis. CONCLUSIONS Taken together, our findings suggest that curcumin represents a promising therapy for DM/CCH-induced cognitive impairments.
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Affiliation(s)
- Yaling Zheng
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Jiawei Zhang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Yao Zhao
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Yaxuan Zhang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Xiaojie Zhang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Jian Guan
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yu Liu
- Department of Medicine, Shanghai Eighth People's Hospital, Shanghai 200235, China
| | - Jianliang Fu
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.
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Zhang J, Liu Y, Zheng Y, Luo Y, Du Y, Zhao Y, Guan J, Zhang X, Fu J. TREM-2-p38 MAPK signaling regulates neuroinflammation during chronic cerebral hypoperfusion combined with diabetes mellitus. J Neuroinflammation 2020; 17:2. [PMID: 31900229 PMCID: PMC6942413 DOI: 10.1186/s12974-019-1688-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 12/22/2019] [Indexed: 12/13/2022] Open
Abstract
Background Diabetes mellitus (DM) and chronic cerebral hypoperfusion(CCH)are both risk factors for cognitive impairment. However, whether DM and CCH can synergistically promote cognitive impairment and the related pathological mechanisms remain unknown. Methods To investigate the effect of DM and CCH on cognitive function, rats fed with high-fat diet (HFD) and injected with low-dose streptozotocin (STZ) followed by bilateral common carotid artery occlusion (BCCAO) were induced to mimic DM and CCH in vivo and mouse BV2 microglial cells were exposed to hypoxia and/or high glucose to mimic CCH complicated with DM pathologies in vitro. To further explore the underlying mechanism, TREM-2-specific small interfering RNA and TREM-2 overexpression lentivirus were used to knock out and overexpress TREM-2, respectively. Results Cognitive deficits, neuronal cell death, neuroinflammation with microglial activation, and TREM-2-MAPK signaling were enhanced when DM was superimposed on CCH both in vivo and in vitro. Manipulating TREM-2 expression levels markedly regulated the p38 MAPK signaling and the inflammatory response in vitro. TREM-2 knockout intensified while TREM-2 overexpression suppressed the p38 MAPK signaling and subsequent pro-inflammatory mediator production under high glucose and hypoxia condition. Conclusions These results suggest that TREM-2 negatively regulates p38 MAPK-mediated inflammatory response when DM was synergistically superimposed on CCH and highlight the importance of TREM-2 as a potential target of immune regulation in DM and CCH.
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Affiliation(s)
- Jiawei Zhang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Yu Liu
- Department of Medicine, Shanghai Eighth People's Hospital, Shanghai, 200235, People's Republic of China
| | - Yaling Zheng
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Yan Luo
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Yu Du
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Yao Zhao
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China
| | - Jian Guan
- Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiaojie Zhang
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China.
| | - Jianliang Fu
- Department of Neurology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, China.
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Metabolic profiling deciphering the potential targets of Yi-Gan San against vascular dementia in rat. Brain Res 2020; 1727:146512. [DOI: 10.1016/j.brainres.2019.146512] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/23/2019] [Accepted: 10/15/2019] [Indexed: 02/07/2023]
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Cheng L, Li J, Zhou Y, Zheng Q, Ming X, Liu S. N-Linoleyltyrosine Protects against Transient Cerebral Ischemia in Gerbil via CB2 Receptor Involvement in PI3K/Akt Signaling Pathway. Biol Pharm Bull 2019; 42:1867-1876. [DOI: 10.1248/bpb.b19-00394] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Lin Cheng
- Department of Pharmacy, Chengdu Medical College
| | - Jinsi Li
- Department of Pharmacy, Chengdu Medical College
| | - Yi Zhou
- Research and Development Center, Chengdu Rongsheng Pharmaceuticals Co., Ltd
| | - Qixue Zheng
- Department of Pharmacy, Chengdu Medical College
| | - Xin Ming
- Department of Pharmacy, Chengdu Medical College
| | - Sha Liu
- Department of Pharmacy, Chengdu Medical College
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An inhibitor of soluble epoxide hydrolase ameliorates diabetes-induced learning and memory impairment in rats. Prostaglandins Other Lipid Mediat 2018; 136:84-89. [PMID: 29751149 DOI: 10.1016/j.prostaglandins.2018.05.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 04/29/2018] [Accepted: 05/07/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Pharmacological inhibition of soluble epoxide hydrolase (sEH) enhances the synaptic function in the CNS and has a protective role in cognitive decline. We hypothesized that the sEH inhibitor TPPU might prevent the diabetes-induced decline in learning and memory which is associated with an alteration in the level of neurotransmitters and oxidative stress. METHODS Type 1 diabetes was induced in rats and the animals were treated with TPPU for 8 weeks. The learning and memory functions were assessed by the Barnes maze and a step-down test. Indicators of oxidative stress, levels of neurotransmitters, and activity of acetylcholinesterase were measured in the discrete regions of the brain. RESULTS Our results revealed that treatment with TPPU significantly improves learning and memory performance in diabetic rats along with decreasing the level of blood sugar. Moreover, treatment with TPPU significantly prevented the diabetes-induced alteration in levels of neurotransmitters, the activity of acetylcholinesterase and preserved anti-oxidant defence system. CONCLUSION Inhibition of the sEH alleviates diabetes-induced decline in learning and memory.
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Zhuo J, Zeng Q, Cai D, Zeng X, Chen Y, Gan H, Huang X, Yao N, Huang D, Zhang C. Evaluation of type 2 diabetic mellitus animal models via interactions between insulin and mitogen‑activated protein kinase signaling pathways induced by a high fat and sugar diet and streptozotocin. Mol Med Rep 2018; 17:5132-5142. [PMID: 29393432 PMCID: PMC5865978 DOI: 10.3892/mmr.2018.8504] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 10/13/2017] [Indexed: 12/11/2022] Open
Abstract
Type 2 diabetic mellitus (T2DM), which is characterized by insulin resistance (IR), hyperglycemia and hyperlipidemia, is a comprehensive dysfunction of metabolism. The insulin receptor (INSR)/phosphoinositide 3‑kinase (PI3K)/AKT signaling pathway is well acknowledged as a predominant pathway associated with glucose uptake; however, the effect of streptozotocin (STZ) plus a high fat and sugar diet (HFSD) on the proteins associated with this pathway requires further elucidation. In order to explore this effect, a T2DM rat model was constructed to investigate T2DM pathogenesis and potential therapeutic advantages. Rats were randomly divided into control and model groups, including normal diet (ND) and HFSD types. ND types were administered intraperitoneal (IP) injections of STZ (35 mg/kg) or a combination of STZ and alloxan monohydrate (AON) (40 mg/kg), whereas HFSD types were composed of HFSD pre‑given, post‑given and simul‑given groups, and were modeled as follows: IP or intramuscular (IM) injection of STZ (35 mg/kg) or a combination of STZ and AON (40 mg/kg). Results indicated that, compared with controls, blood glucose, insulin, homeostatic model assessment‑insulin resistance and total triglyceride were significantly elevated in groups with HFSD and modeling agents (P<0.05 or P<0.01), whereas total cholesterol and low‑density lipoprotein levels were significantly elevated in groups simultaneously administered HFSD and modeling agents (P<0.05 or P<0.01), in addition to downregulation of the expression of insulin signaling pathway proteins in the liver, including INSR, PI3K, AKT1, phosphatidylinositol-5-phosphate 4‑kinase type‑2α (PIP5Kα) and glucose transporter (GLUT)2, and increased expression of inflammatory factors, including p38, tumor necrosis factor (TNF)α and interleukin (IL)6. Furthermore, compared with other two HFSD types including pre‑given and post‑given group, the simul‑given group that received IM injection with STZ exhibited decreased expression levels of major insulin signal pathway proteins INSR, PI3K, AKT1, PIP5Kα, GLUT2 or GLUT4 in the liver and pancreas (P<0.05 or P<0.01), whereas the opposite was observed in the skeletal muscle. In addition, the protein expression levels of phosphorylated‑p38, p38, IL6 and TNFα in the simul‑given group that received IM injection with STZ were increased (P<0.05 or P<0.01), and histopathology also indicated inflammation in pancreas and liver. The present findings suggest that a low dose of STZ may partially impair the β cells of the pancreas, whereas long‑term excess intake of HFSD may increase lipid metabolites, inhibit the insulin signaling pathway and activate the mitogen‑activated protein kinase p38 signaling pathway. The combined action of STZ and AON may result in insulin resistance, which ultimately results in abnormalities in glucose and lipid metabolism. The present model, analogue to T2DM onset of humans, evaluated the medical effect on metabolic dysfunction and provides an insight into the underlining mechanism of IR.
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Affiliation(s)
- Juncheng Zhuo
- Department of Pharmacology of Traditional Chinese Medicine, The Fifth Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510095, P.R. China
| | - Qiaohuang Zeng
- Department of Chinese Medicine Immunity, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, P.R. China
| | - Dake Cai
- Guangdong Provincial Key Laboratory of Research and Development in Traditional Chinese Medicine, Guangdong Province Engineering Technology Research Institute of TCM, Guangzhou, Guangdong 510405, P.R. China
| | - Xiaohui Zeng
- Guangdong Provincial Key Laboratory of Research and Development in Traditional Chinese Medicine, Guangdong Province Engineering Technology Research Institute of TCM, Guangzhou, Guangdong 510405, P.R. China
| | - Yuxing Chen
- Guangdong Provincial Key Laboratory of Research and Development in Traditional Chinese Medicine, Guangdong Province Engineering Technology Research Institute of TCM, Guangzhou, Guangdong 510405, P.R. China
| | - Haining Gan
- Guangdong Provincial Key Laboratory of Research and Development in Traditional Chinese Medicine, Guangdong Province Engineering Technology Research Institute of TCM, Guangzhou, Guangdong 510405, P.R. China
| | - Xuejun Huang
- Guangdong Provincial Key Laboratory of Research and Development in Traditional Chinese Medicine, Guangdong Province Engineering Technology Research Institute of TCM, Guangzhou, Guangdong 510405, P.R. China
| | - Nan Yao
- Guangdong Provincial Key Laboratory of Research and Development in Traditional Chinese Medicine, Guangdong Province Engineering Technology Research Institute of TCM, Guangzhou, Guangdong 510405, P.R. China
| | - Dane Huang
- Guangdong Provincial Key Laboratory of Research and Development in Traditional Chinese Medicine, Guangdong Province Engineering Technology Research Institute of TCM, Guangzhou, Guangdong 510405, P.R. China
| | - Chengzhe Zhang
- Department of Pharmacology of Traditional Chinese Medicine, The Fifth Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510095, P.R. China
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Gheibi S, Kashfi K, Ghasemi A. A practical guide for induction of type-2 diabetes in rat: Incorporating a high-fat diet and streptozotocin. Biomed Pharmacother 2017; 95:605-613. [PMID: 28881291 DOI: 10.1016/j.biopha.2017.08.098] [Citation(s) in RCA: 179] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 08/12/2017] [Accepted: 08/23/2017] [Indexed: 02/06/2023] Open
Abstract
Prevalence of diabetes, a serious public health problem is rapidly increasing worldwide. Type-2 diabetes is the common form of diabetes characterized by insulin resistance and abnormalities in insulin production. Despite the current development of therapeutic agents, there is no effective treatment without side effects; it is therefore necessary to find new prevention strategies and better treatments. For this purpose animal models of diabetes are appropriate tools, of which rodents due to the short generation time and economic considerations are the first choice. The aim of this review is to present features of a frequently used model of type-2 diabetes in rat, induced by a high fat diet and streptozotocin, taking into account its advantages/disadvantages and presenting a practical guide.
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Affiliation(s)
- Sevda Gheibi
- Endocrine Physiology Research Center, Research institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Neurophysiology Research Center and Department of Physiology, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Khosrow Kashfi
- Department of Molecular, Cellular and Biomedical Sciences, Sophie Davis School of Biomedical Education, City University of New York School of Medicine, New York, USA
| | - Asghar Ghasemi
- Endocrine Physiology Research Center, Research institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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