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Cheng X, Tan Y, Li H, Zhang Z, Hui S, Zhang Z, Peng W. Mechanistic Insights and Potential Therapeutic Implications of NRF2 in Diabetic Encephalopathy. Mol Neurobiol 2024; 61:8253-8278. [PMID: 38483656 DOI: 10.1007/s12035-024-04097-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/04/2024] [Indexed: 09/21/2024]
Abstract
Diabetic encephalopathy (DE) is a complication of diabetes, especially type 2 diabetes (T2D), characterized by damage in the central nervous system and cognitive impairment, which has gained global attention. Despite the extensive research aimed at enhancing our understanding of DE, the underlying mechanism of occurrence and development of DE has not been established. Mounting evidence has demonstrated a close correlation between DE and various factors, such as Alzheimer's disease-like pathological changes, insulin resistance, inflammation, and oxidative stress. Of interest, nuclear factor erythroid 2-related factor 2 (NRF2) is a transcription factor with antioxidant properties that is crucial in maintaining redox homeostasis and regulating inflammatory responses. The activation and regulatory mechanisms of NRF2 are a relatively complex process. NRF2 is involved in the regulation of multiple metabolic pathways and confers neuroprotective functions. Multiple studies have provided evidence demonstrating the significant involvement of NRF2 as a critical transcription factor in the progression of DE. Additionally, various molecules capable of activating NRF2 expression have shown potential in ameliorating DE. Therefore, it is intriguing to consider NRF2 as a potential target for the treatment of DE. In this review, we aim to shed light on the role and the possible underlying mechanism of NRF2 in DE. Furthermore, we provide an overview of the current research landscape and address the challenges associated with using NRF2 activators as potential treatment options for DE.
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Affiliation(s)
- Xin Cheng
- Department of Integrated Traditional Chinese & Western Medicine, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, Hunan, 410011, People's Republic of China
- National Clinical Research Center for Mental Disorder, Changsha, 410011, China
| | - Yejun Tan
- School of Mathematics, University of Minnesota, Twin Cities, Minneapolis, MN, USA
| | - Hongli Li
- Department of Integrated Traditional Chinese & Western Medicine, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, Hunan, 410011, People's Republic of China
- National Clinical Research Center for Mental Disorder, Changsha, 410011, China
| | - Zhen Zhang
- YangSheng College of Traditional Chinese Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, Guizhou, China
| | - Shan Hui
- Department of Geratology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, 410005, China
| | - Zheyu Zhang
- Department of Integrated Traditional Chinese & Western Medicine, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, Hunan, 410011, People's Republic of China.
- National Clinical Research Center for Mental Disorder, Changsha, 410011, China.
| | - Weijun Peng
- Department of Integrated Traditional Chinese & Western Medicine, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, Hunan, 410011, People's Republic of China.
- National Clinical Research Center for Mental Disorder, Changsha, 410011, China.
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Armio RL, Laurikainen H, Ilonen T, Walta M, Sormunen E, Tolvanen A, Salokangas RKR, Koutsouleris N, Tuominen L, Hietala J. Longitudinal study on hippocampal subfields and glucose metabolism in early psychosis. SCHIZOPHRENIA (HEIDELBERG, GERMANY) 2024; 10:66. [PMID: 39085221 PMCID: PMC11291638 DOI: 10.1038/s41537-024-00475-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 05/11/2024] [Indexed: 08/02/2024]
Abstract
Altered hippocampal morphology and metabolic pathology, but also hippocampal circuit dysfunction, are established phenomena seen in psychotic disorders. Thus, we tested whether hippocampal subfield volume deficits link with deviations in glucose metabolism commonly seen in early psychosis, and whether the glucose parameters or subfield volumes change during follow-up period using one-year longitudinal study design of 78 first-episode psychosis patients (FEP), 48 clinical high-risk patients (CHR) and 83 controls (CTR). We also tested whether hippocampal morphology and glucose metabolism relate to clinical outcome. Hippocampus subfields were segmented with Freesurfer from 3T MRI images and parameters of glucose metabolism were determined in fasting plasma samples. Hippocampal subfield volumes were consistently lower in FEPs, and findings were more robust in non-affective psychoses, with strongest decreases in CA1, molecular layer and hippocampal tail, and in hippocampal tail of CHRs, compared to CTRs. These morphometric differences remained stable at one-year follow-up. Both non-diabetic CHRs and FEPs had worse glucose parameters compared to CTRs at baseline. We found that, insulin levels and insulin resistance increased during the follow-up period only in CHR, effect being largest in the CHRs converting to psychosis, independent of exposure to antipsychotics. The worsening of insulin resistance was associated with deterioration of function and symptoms in CHR. The smaller volume of hippocampal tail was associated with higher plasma insulin and insulin resistance in FEPs, at the one-year follow-up. Our longitudinal study supports the view that temporospatial hippocampal subfield volume deficits are stable near the onset of first psychosis, being more robust in non-affective psychoses, but less prominent in the CHR group. Specific subfield defects were related to worsening glucose metabolism during the progression of psychosis, suggesting that hippocampus is part of the circuits regulating aberrant glucose metabolism in early psychosis. Worsening of glucose metabolism in CHR group was associated with worse clinical outcome measures indicating a need for heightened clinical attention to metabolic problems already in CHR.
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Grants
- Turun Yliopistollisen Keskussairaalan Koulutus- ja Tutkimussäätiö (TYKS-säätiö)
- Alfred Kordelinin Säätiö (Alfred Kordelin Foundation)
- Finnish Cultural Foundation | Varsinais-Suomen Rahasto (Varsinais-Suomi Regional Fund)
- Suomalainen Lääkäriseura Duodecim (Finnish Medical Society Duodecim)
- Turun Yliopisto (University of Turku)
- This work was supported by funding for the VAMI-project (Turku University Hospital, state research funding, no. P3848), partly supported by EU FP7 grants (PRONIA, grant a # 602152 and METSY grant #602478). Dr. Armio received personal funding from Doctoral Programme in Clinical Research at the University of Turku, grants from State Research Funding, Turunmaa Duodecim Society, Finnish Psychiatry Research Foundation, Finnish University Society of Turku (Valto Takala Foundation), Tyks-foundation, The Finnish Medical Foundation (Maija and Matti Vaskio fund), University of Turku, The Alfred Kordelin Foundation, Finnish Cultural Foundation (Terttu Enckell fund and Ritva Helminen fund) and The Alfred Kordelin foundation. Further, Dr. Tuominen received personal grant from Sigrid Juselius and Orion research foundation and NARSAD Young Investigator Grant from the Brain & Behavior Research Foundation.
- This work was supported by funding for the VAMI-project (Turku University Hospital, state research funding, no. P3848), partly supported by EU FP7 grants (PRONIA, grant a # 602152 and METSY grant #602478). Dr. Tuominen received personal grant from Sigrid Juselius and Orion research foundation and NARSAD Young Investigator Grant from the Brain & Behavior Research Foundation.
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Affiliation(s)
- Reetta-Liina Armio
- PET Centre, Turku University Hospital, 20520, Turku, Finland.
- Department of Psychiatry, University of Turku, 20700, Turku, Finland.
- Department of Psychiatry, Turku University Hospital, 20520, Turku, Finland.
| | - Heikki Laurikainen
- PET Centre, Turku University Hospital, 20520, Turku, Finland
- Department of Psychiatry, University of Turku, 20700, Turku, Finland
- Department of Psychiatry, Turku University Hospital, 20520, Turku, Finland
| | - Tuula Ilonen
- Department of Psychiatry, University of Turku, 20700, Turku, Finland
| | - Maija Walta
- PET Centre, Turku University Hospital, 20520, Turku, Finland
- Department of Psychiatry, University of Turku, 20700, Turku, Finland
- Department of Psychiatry, Turku University Hospital, 20520, Turku, Finland
| | - Elina Sormunen
- PET Centre, Turku University Hospital, 20520, Turku, Finland
- Department of Psychiatry, University of Turku, 20700, Turku, Finland
- Department of Psychiatry, Turku University Hospital, 20520, Turku, Finland
| | - Arvi Tolvanen
- Department of Psychiatry, University of Turku, 20700, Turku, Finland
| | | | - Nikolaos Koutsouleris
- Department of Psychiatry and Psychotherapy, Ludwig-Maximilian University, D-80336, Munich, Germany
| | - Lauri Tuominen
- Department of Psychiatry, Turku University Hospital, 20520, Turku, Finland
- The Royal's Institute of Mental Health Research, University of Ottawa, Ottawa, ON, Canada
- Department of Psychiatry, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Jarmo Hietala
- PET Centre, Turku University Hospital, 20520, Turku, Finland
- Department of Psychiatry, University of Turku, 20700, Turku, Finland
- Department of Psychiatry, Turku University Hospital, 20520, Turku, Finland
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Li M, Li Y, Zhao K, Qin C, Chen Y, Liu Y, Qiu S, Tan X, Liang Y. Abnormal cerebral blood flow and brain function in type 2 diabetes mellitus. Endocrine 2024; 85:433-442. [PMID: 37340286 DOI: 10.1007/s12020-023-03342-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 02/25/2023] [Indexed: 06/22/2023]
Abstract
PURPOSE Type 2 diabetes mellitus (T2DM) lead to impaired cerebral blood perfusion, which leads to changes in brain function and affects the cognitive function of patients. In this study, cerebral blood flow (CBF) was used to evaluate the effect of T2DM on cerebral perfusion, and functional connectivity (FC) analysis was further used to explore whether the FC between the abnormal CBF region and the whole brain was changed. In addition, amplitude of low-frequency fluctuation (ALFF) and degree centrality (DC) were used to investigate the changes in spontaneous activity and connectivity strength of the brain network. METHODS We recruited 40 T2DM patients and 55 healthy controls (HCs). They underwent 3D-T1WI, rs-fMRI, arterial spin labeling (ASL) sequence scans and a series of cognitive tests. Cognitive test scores and brain imaging indicators were compared between the two groups, and the relationships among laboratory indicators, cognitive test scores, and brain imaging indicators were explored in the T2DM group. RESULTS Compared to HCs, The CBF values of Calcarine_L and Precuneus_R in the T2DM group were lower. The DC value of Paracentral_Lobule_L and Precuneus_L, and the ALFF value of Hippocampus_L in the T2DM group were higher. In addition, the CBF values of Calcarine_L was negatively correlated with fasting insulin and HOMA_IR. CONCLUSION This study found that there were regions of cerebral hypoperfusion in T2DM patients, which are associated with insulin resistance. In addition, we found abnormally elevated brain activity and enhanced functional connectivity in T2DM patients, which we speculated was the compensatory mechanism of brain neural activity.
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Affiliation(s)
- Mingrui Li
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Magnatic Resonance Imaging, Zhanjiang First Hospital of Traditional Chinese Medicine, Zhanjiang, China
| | - Yifan Li
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Kui Zhao
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Chunhong Qin
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuna Chen
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yujie Liu
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shijun Qiu
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China.
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Xin Tan
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Yi Liang
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China.
- Department of Radiology, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
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Stanisławska-Kubiak M, Majewska KA, Krasińska A, Wais P, Majewski D, Mojs E, Kȩdzia A. Brain functional and structural changes in diabetic children. How can intellectual development be optimized in type 1 diabetes? Ther Adv Chronic Dis 2024; 15:20406223241229855. [PMID: 38560719 PMCID: PMC10981223 DOI: 10.1177/20406223241229855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 01/11/2024] [Indexed: 04/04/2024] Open
Abstract
The neuropsychological functioning of people with type 1 diabetes (T1D) is of key importance to the effectiveness of the therapy, which, in its complexity, requires a great deal of knowledge, attention, and commitment. Intellectual limitations make it difficult to achieve the optimal metabolic balance, and a lack of this alignment can contribute to the further deterioration of cognitive functions. The aim of this study was to provide a narrative review of the current state of knowledge regarding the influence of diabetes on brain structure and functions during childhood and also to present possible actions to optimize intellectual development in children with T1D. Scopus, PubMed, and Web of Science databases were searched for relevant literature using selected keywords. The results were summarized using a narrative synthesis. Disturbances in glucose metabolism during childhood may have a lasting negative effect on the development of the brain and related cognitive functions. To optimize intellectual development in children with diabetes, it is essential to prevent disorders of the central nervous system by maintaining peri-normal glycemic levels. Based on the performed literature review, it seems necessary to take additional actions, including repeated neuropsychological evaluation with early detection of any cognitive dysfunctions, followed by the development of individual management strategies and the training of appropriate skills, together with complex, multidirectional environmental support.
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Affiliation(s)
- Maia Stanisławska-Kubiak
- Department of Clinical Psychology, Poznan University of Medical Sciences, ul. Bukowska 70, Poznan 60-812, Poland
| | - Katarzyna Anna Majewska
- Department of Pediatric Diabetes, Auxology and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | - Agata Krasińska
- Department of Pediatric Diabetes, Auxology and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | - Paulina Wais
- Department of Pediatric Diabetes, Auxology and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | - Dominik Majewski
- Department of Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Ewa Mojs
- Department of Clinical Psychology, Poznan University of Medical Sciences, Poznan, Poland
| | - Andrzej Kȩdzia
- Department of Pediatric Diabetes, Auxology and Obesity, Poznan University of Medical Sciences, Poznan, Poland
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Aggarwal A, Yadav B, Sharma N, Kaur R, Rishi V. Disruption of histone acetylation homeostasis triggers cognitive dysfunction in experimental diabetes. Neurochem Int 2023; 170:105592. [PMID: 37598859 DOI: 10.1016/j.neuint.2023.105592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/10/2023] [Accepted: 08/16/2023] [Indexed: 08/22/2023]
Abstract
Epigenetic mechanisms related to diabetes-afflicted CNS complications are largely unknown. The present study investigated the role of histone acetylation mechanisms triggering cognitive dysfunction in the Type 1 and 2 diabetic mice model. Dynamic changes in diabetic parameters like fasting blood glucose levels, glucose tolerance test, and insulin levels were observed after the induction of diabetes. Cognitive performance was significantly diminished in T1D and T2D mice examined by the Morris water maze, novel object recognition test, and Y Maze as compared to controls. Histone profiling revealed a significant reduction in H3K9/14 and H4K12 acetylation in the cortex and hippocampus of T1D and T2D mice vs Controls. While histone deacetylase (HDAC) activity was significantly elevated in brain regions of T1D and T2D mice, the histone acetyltransferase (HAT) activity remain unchanged. Significantly increased HDAC 2, HDAC 3 protein and mRNA expression observed in T1D and T2D brain regions may corroborate for increased HDAC activity. No significant change was observed in protein and mRNA expression of HDAC 1, 5, 6, and 7 in diabetic brains. Reduced H3K9/14 and H4K12 acetylation paralleled transcriptional repression of memory-related markers BDNF, SYP, and PSD-95 in the cortex and hippocampus of T1D and T2D. Pharmacological inhibition of HDAC activity by Trichostatin A enhanced the cognitive changes observed in T1D and T2D by ameliorating BDNF, SYP, Psd-95. The present study provides a better insight into molecular mechanisms related to diabetes-dependent memory changes that can help to generate new advances for therapeutics to be developed in this area.
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Affiliation(s)
- Aanchal Aggarwal
- National Agri-Food Biotechnology Institute, Knowledge City, Sector-81, SAS Nagar, Punjab, India.
| | - Binduma Yadav
- National Agri-Food Biotechnology Institute, Knowledge City, Sector-81, SAS Nagar, Punjab, India; Regional Centre for Biotechnology (RCB), NCR Biotech Science Cluster, Faridabad, Haryana, India
| | - Nishtha Sharma
- National Agri-Food Biotechnology Institute, Knowledge City, Sector-81, SAS Nagar, Punjab, India
| | - Raminder Kaur
- National Agri-Food Biotechnology Institute, Knowledge City, Sector-81, SAS Nagar, Punjab, India; Department of Biotechnology, Sector-25, BMS Block I, Panjab University, Chandigarh, India
| | - Vikas Rishi
- National Agri-Food Biotechnology Institute, Knowledge City, Sector-81, SAS Nagar, Punjab, India.
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Kang X, Wang D, Zhang L, Huang T, Liu S, Feng X, Guo Y, Zhang Z, Wang Z, Ren H, Yuan G. Exendin-4 ameliorates tau hyperphosphorylation and cognitive impairment in type 2 diabetes through acting on Wnt/β-catenin/NeuroD1 pathway. Mol Med 2023; 29:118. [PMID: 37667187 PMCID: PMC10478475 DOI: 10.1186/s10020-023-00718-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 08/21/2023] [Indexed: 09/06/2023] Open
Abstract
BACKGROUND Type 2 diabetes (T2D) is an independent risk factor for Alzheimer's disease (AD). Exendin-4 (Ex-4), a widely used glucagon-like peptide-1 receptor agonist drug in the treatment of T2D, has been demonstrated the therapeutic effects on diabetic encephalopathy (DE). Especially, the Ex-4 ameliorates the tau hyperphosphorylation and cognitive impairment in DE. And these crucial alterations are also important bridge between T2D and AD. However, its unique mechanism is unclear. METHODS The db/db mice, high-fat-diet (HFD) / streptozotocin (STZ)-induced diabetic (HF-diabetic) mice, and high-glucose-damaged (HGD) HT-22 hippocampal cells were enrolled to examine the effects of Ex-4 on AD-like changes in T2D. The Novel object recognition test (NORT) and Morris water maze test (MWMT) were conducted to evaluate the cognitive impairment. The Dickkopf-1 (DKK1) was employed to weaken the activation of the Wnt/β-catenin pathway to explore the mechanism of Ex-4 in protecting the brain functions. The JASPAR was based to predict the interaction between NeuroD1 and the promoter region of Ins2. Moreover, the chromatin immunoprecipitation coupled with quantitative polymerase chain reaction (ChIP-qPCR) and luciferase reporter assays were performed. RESULTS Ex-4 alleviated the tau hyperphosphorylation, increased the brain-derived insulin, and improved the PI3K/AKT/GSK3-β signalling in db/db mice, HF-diabetic mice, and HGD HT-22 hippocampal neuronal cells. The NORT and MWMT indicated that Ex-4 alleviated the learning and memory deficits in HF-diabetic mice. The inhibitor Dickkopf-1 (DKK1) of the Wnt/β-catenin pathway significantly blocked the protective effects of Ex-4. Regarding further molecular mechanisms, NeuroD1 was affected by Ex-4 in vivo and in vitro, and the knockdown or overexpression of NeuroD1 suggested its crucial role in promoting the brain insulin by Ex-4. Meanwhile, the ChIP‒qPCR and luciferase reporter assays confirmed the combination between NeuroD1 and the promoter region of the insulin-encoding gene Ins2. And this interaction could be promoted by Ex-4. CONCLUSIONS Our study proposes that Ex-4 alleviates tau hyperphosphorylation and cognitive dysfunction by increasing Ins2-derived brain insulin through the Wnt/β-catenin/NeuroD1 signaling in T2D. And its also show new lights on part of the progress and mechanism on treatment targets for the DE in T2D.
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Affiliation(s)
- Xiaonan Kang
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Dan Wang
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Lu Zhang
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Teng Huang
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Siyue Liu
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiaohui Feng
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yaoyao Guo
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ziyin Zhang
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Zhongjing Wang
- Department of Endocrinology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.
| | - Huihui Ren
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
- Branch of National Clinical Research Center for Metabolic Disease, Hubei, People's Republic of China.
| | - Gang Yuan
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
- Branch of National Clinical Research Center for Metabolic Disease, Hubei, People's Republic of China.
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Li M, Li Y, Zhao K, Tan X, Chen Y, Qin C, Qiu S, Liang Y. Changes in the structure, perfusion, and function of the hippocampus in type 2 diabetes mellitus. Front Neurosci 2023; 16:1070911. [PMID: 36699515 PMCID: PMC9868830 DOI: 10.3389/fnins.2022.1070911] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/06/2022] [Indexed: 01/12/2023] Open
Abstract
Objective This study aims to explore the changes in the structure, perfusion, and function of the bilateral hippocampus in type 2 diabetes mellitus (T2DM) applying multimodal MRI methods, hoping to provide reliable neuroimaging evidence for the diagnosis of hippocampus-related brain injury in T2DM. Methods We recruited 30 T2DM patients and 45 healthy controls (HCs), on which we performed 3D T1-weighted images, resting-state functional MRI (rs-fMRI), arterial spin labeling (ASL) sequences, and a series of cognitive tests. Then, we compared the differences of two groups in the cerebral blood flow (CBF) value, amplitude of low-frequency fluctuation (ALFF) value, fractional ALFF (fALFF) value, coherence-based regional homogeneity (Cohe-ReHo) value, and degree centrality (DC) values of the bilateral hippocampus. Results In the T2DM group, the bilateral hippocampal volumes and the CBF value of the right hippocampus were lower than those in the HCs, while the ALFF value, fALFF value, and Cohe-ReHo value of the bilateral hippocampus were higher than those in the HCs. Correlation analysis showed that fasting blood glucose (FBG) was negatively correlated with the residuals of left hippocampal volume (r = -0.407, P = 0.025) and right hippocampal volume (r = -0.420, P = 0.021). The residual of the auditory-verbal learning test (AVLT) (immediate) score was positively correlated with the residual of right hippocampal volume (r = 0.369, P = 0.045). Conclusion This study indicated that the volume and perfusion of the hippocampus are decreased in T2DM patients that related to chronic hyperglycemia. Local spontaneous neural activity and coordination are increased in the hippocampus of T2DM patients, possibly as an adaptive compensation for cognitive decline.
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Affiliation(s)
- Mingrui Li
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China,Department of Magnetic Resonance Imaging, Zhanjiang First Hospital of Traditional Chinese Medicine, Zhanjiang, China
| | - Yifan Li
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Kui Zhao
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xin Tan
- Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuna Chen
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Chunhong Qin
- Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China,Chunhong Qin,
| | - Shijun Qiu
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China,Shijun Qiu,
| | - Yi Liang
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,Department of Radiology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China,*Correspondence: Yi Liang,
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Fahimi S, Oryan S, Ahmadi R, Eidi A. Downregulation of Bax/Bcl-2 Expression During Apoptosis in the Hippocampus of Diabetic Male Wistar Rats: Ameliorative Effects of Peganum harmala Seed Extract. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2022; 21:e132071. [PMID: 36915407 PMCID: PMC10007996 DOI: 10.5812/ijpr-132071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 12/10/2022] [Accepted: 01/11/2023] [Indexed: 02/04/2023]
Abstract
Background Apoptosis is proposed as a possible mechanism for diabetes-induced hippocampal neuronal cell death. Numerous studies have suggested that the therapeutic properties of plants, such as antioxidant and anti-apoptotic, are effective in improving the complications of diabetes in the hippocampus. Objectives This study aimed to evaluate the anti-apoptotic properties of Peganum harmala (P. harmala) in the brain hippocampal cells of diabetic rats. Methods In this experimental study, 48 male Wistar rats were divided into six groups (n = 8) as follows: Control (C), diabetic (D), harmine (H), diabetic plus harmine (DH), seed extract (S), and diabetic plus seed extract (DS). A single dose of streptozotocin (STZ) (60 mg/kg) was enough to cause diabetes. Seed extract and harmine were given at 150 mg/kg and 6.5 mg/kg, respectively (daily by oral gavage for 28 days). The glucose levels in the blood were measured, and the histological staining of the hippocampus was examined. Percentages of apoptotic hippocampal cells were identified with flow cytometry. Bax and Bcl-2 expression was assayed via Real time- polymerase chain reaction (PCR) and Western blot. Results In DH (P = 0.001) and DS (P = 0.01) rats, the mean fasting blood glucose level significantly reduced compared with the D group. Bax and Bcl-2 expression at both mRNA and protein levels significantly differed between the D group and other groups (P = 0.01). Harmine and the seed extract considerably reduced the Bax/Bcl-2 ratio in the hippocampal cells compared to the D group (P = 0.001). Conclusions Streptozotocin-induced apoptosis in the hippocampus of diabetic rats was reduced by administering the seed extract of Peganum harmala. The P. harmala seed extract and its active ingredient, harmine, could be used as anti-apoptotic drugs.
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Affiliation(s)
- Saeedeh Fahimi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Shahrbanoo Oryan
- Department of Animal Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Ramesh Ahmadi
- Department of Animal Sciences, Faculty of Basic Sciences, Islamic Azad University of Qom, Qom, Iran
- Corresponding Author: Department of Animal Sciences, Faculty of Basic Sciences, Islamic Azad University of Qom, Qom, Iran.
| | - Akram Eidi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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9
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Ivanisevic M, Marcinko D, Vuckovic-Rebrina S, Delmis J. Positive Association between Preserved C-Peptide and Cognitive Function in Pregnant Women with Type-1 Diabetes. Biomedicines 2022; 10:biomedicines10112785. [PMID: 36359305 PMCID: PMC9687841 DOI: 10.3390/biomedicines10112785] [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: 09/14/2022] [Revised: 10/13/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022] Open
Abstract
This study focused on the cognitive function of women with type 1 diabetes in pregnancy. We investigated risk factors for a low cognitive score such as age, duration of Diabetes, BMI, subclinical hypothyroidism, cardiovascular autonomic neuropathy, the impact of hypo-/hyperglycemia, and C-peptide preservation. Material and methods. Seventy-eight pregnant women with type 1 diabetes (age 31.1 ± 5.4 years, diabetes duration 14.3 ± 8.9 years) were included in the study. Cognitive function was assessed in different domains, such as reasoning, memory, attention, coordination, and perception. Results. The cognitive test values ≥400 were considered high scores, and values <400 were considered low. Relative risks for low scores for general cognitive function were associated with increased BMI > 25 kg/m2 2.208 (95% CI 1.116−4.370), HbA1c > 6.5% RR 0.774 (95% CI 0.366−1.638), subclinical hypothyroidism RR 3.111 (95% CI 1.140−8.491), and impaired cardiovascular autonomic neuropathy RR 2.250 (95% CI 1.000−5.062). Pregnant women with a lower score for general cognitive function had higher BMI and higher leptin levels. Preserved C-peptide reduces the risk for cognitive impairment (RR 0.297 (95% CI 0.097−0.912)) in pregnant women with type 1 diabetes Conclusion. BMI > 25 kg/m2, subclinical hypothyroidism, and cardiovascular autonomic neuropathy are associated with increased risk, and postprandial C-peptide preservation with reduced risk for cognitive impairment in pregnant women with type 1 diabetes.
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Affiliation(s)
- Marina Ivanisevic
- Department of Obstetrics and Gynecology, School of Medicine, University Hospital Centre Zagreb, University of Zagreb, 10000 Zagreb, Croatia
| | - Darko Marcinko
- Clinic for Psychiatry and Psychological Medicine, School of Medicine, University Hospital Centre Zagreb, University of Zagreb, 10000 Zagreb, Croatia
| | - Sandra Vuckovic-Rebrina
- Vuk Vrhovac Clinic for Diabetes, Endocrinology and Metabolic Diseases, Merkur University Hospital, 10000 Zagreb, Croatia
| | - Josip Delmis
- Department of Obstetrics and Gynecology, School of Medicine, University Hospital Centre Zagreb, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: ; Tel.: +385-98-460-485
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10
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Tang SX, Oliver LD, Hänsel K, DeRosse P, John M, Khairullah A, Gold JM, Buchanan RW, Voineskos A, Malhotra AK. Metabolic disturbances, hemoglobin A1c, and social cognition impairment in Schizophrenia spectrum disorders. Transl Psychiatry 2022; 12:233. [PMID: 35668078 PMCID: PMC9170776 DOI: 10.1038/s41398-022-02002-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 05/23/2022] [Accepted: 05/26/2022] [Indexed: 11/09/2022] Open
Abstract
Social cognitive impairments are core features of schizophrenia spectrum disorders (SSD) and are associated with greater functional impairment and decreased quality of life. Metabolic disturbances have been related to greater impairment in general neurocognition, but their relationship to social cognition has not been previously reported. In this study, metabolic measures and social cognition were assessed in 245 participants with SSD and 165 healthy comparison subjects (HC), excluding those with hemoglobin A1c (HbA1c) > 6.5%. Tasks assessed emotion processing, theory of mind, and social perception. Functional connectivity within and between social cognitive networks was measured during a naturalistic social task. Among SSD, a significant inverse relationship was found between social cognition and cumulative metabolic burden (β = -0.38, p < 0.001) and HbA1c (β = -0.37, p < 0.001). The relationship between social cognition and HbA1c was robust across domains and measures of social cognition and after accounting for age, sex, race, non-social neurocognition, hospitalization, and treatment with different antipsychotic medications. Negative connectivity between affect sharing and motor resonance networks was a partial mediator of this relationship across SSD and HC groups (β = -0.05, p = 0.008). There was a group x HbA1c effect indicating that SSD participants were more adversely affected by increasing HbA1c. Thus, we provide the first report of a robust relationship in SSD between social cognition and abnormal glucose metabolism. If replicated and found to be causal, insulin sensitivity and blood glucose may present as promising targets for improving social cognition, functional outcomes, and quality of life in SSD.
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Affiliation(s)
- Sunny X Tang
- Institute of Behavioral Science, Feinstein Institutes for Medical Research, Glen Oaks, NY, USA.
- Department of Psychiatry, Zucker Hillside Hospital, Glen Oaks, NY, USA.
| | | | - Katrin Hänsel
- Institute of Behavioral Science, Feinstein Institutes for Medical Research, Glen Oaks, NY, USA
- Department of Laboratory Medicine, Yale University, New Haven, CT, USA
| | - Pamela DeRosse
- Department of Psychology, Stony Brook University, Stony Brook, NY, USA
| | - Majnu John
- Institute of Behavioral Science, Feinstein Institutes for Medical Research, Glen Oaks, NY, USA
- Department of Psychiatry, Zucker Hillside Hospital, Glen Oaks, NY, USA
| | - Ammar Khairullah
- The Centre for Addiction and Mental Health, Toronto, ON, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - James M Gold
- Maryland Psychiatric Research Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Robert W Buchanan
- Maryland Psychiatric Research Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Aristotle Voineskos
- The Centre for Addiction and Mental Health, Toronto, ON, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Anil K Malhotra
- Institute of Behavioral Science, Feinstein Institutes for Medical Research, Glen Oaks, NY, USA
- Department of Psychiatry, Zucker Hillside Hospital, Glen Oaks, NY, USA
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11
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Zhang Y, Zhang Y, Shi X, Han J, Lin B, Peng W, Mei Z, Lin Y. Metformin and the risk of neurodegenerative diseases in patients with diabetes: A meta-analysis of population-based cohort studies. Diabet Med 2022; 39:e14821. [PMID: 35213749 DOI: 10.1111/dme.14821] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 02/23/2022] [Indexed: 11/29/2022]
Abstract
AIMS The association between metformin use and neurodegenerative disease (ND) onset remains controversial. In this systematic review and meta-analysis, we aimed to determine the relationship between metformin use and ND risk based on data from population-based cohort studies. METHODS Articles were systematically searched in PubMed, EMBASE and Cochrane Library databases. Pooled relative risks (RRs) with 95% CIs were obtained using a random-effects model. Subgroup analyses, sensitivity analyses and meta-regression were performed to identify the sources of heterogeneity and strengthen the results. RESULTS Twelve population-based cohort studies involving 194,792 participants (94,462 metformin users and 100,330 metformin non-users) were eligible for inclusion in this meta-analysis. The pooled RR of NDs reached 0.77 (95% CI 0.67-0.88) when comparing metformin users with non-users. The effects were more prominent in long-term metformin users (≥4 years) (RR 0.29, 95% CI 0.13-0.44) and studies from Asian countries (RR 0.69, 95% CI 0.64-0.74). The effect estimates were stable when stratified by subtypes of NDs, study designs, and control definitions (p for interaction >0.05). Meta-regression did not identify the coefficients as the sources of heterogeneity (all p > 0.05). CONCLUSIONS This systematic review and meta-analysis found that metformin use, especially long-term use, was associated with lower ND risk. However, because there was substantial heterogeneity among studies, high-quality randomized controlled trials are still needed to confirm this finding.
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Affiliation(s)
- Yunnan Zhang
- Department of Pharmacy, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, China
| | - Yi Zhang
- Department of Pharmacy, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, China
| | - Xiujin Shi
- Department of Pharmacy, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Jialun Han
- Department of Pharmacy, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, China
| | - Baidi Lin
- Department of Pharmacy, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, China
| | - Wenxing Peng
- Department of Pharmacy, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Zubing Mei
- Department of Anorectal Surgery, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Anorectal Disease Institute of Shuguang Hospital, Shanghai, China
| | - Yang Lin
- Department of Pharmacy, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, China
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12
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Onikanni AS, Lawal B, Oyinloye BE, Mostafa-Hedeab G, Alorabi M, Cavalu S, Olusola AO, Wang CH, Batiha GES. Therapeutic efficacy of Clompanus pubescens leaves fractions via downregulation of neuronal cholinesterases/Na+-K+ATPase/IL-1 β, and improving the neurocognitive and antioxidants status of streptozotocin-induced diabetic rats. Biomed Pharmacother 2022; 148:112730. [DOI: 10.1016/j.biopha.2022.112730] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/02/2022] [Accepted: 02/15/2022] [Indexed: 12/29/2022] Open
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13
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Afzal M, Al-Abbasi FA, Kazmi I, Imam SS, Alshehri S, Ghoneim MM, Almalki WH, Nadeem MS, Sayyed N. Fustin Inhibits Oxidative Free Radicals and Inflammatory Cytokines in Cerebral Cortex and Hippocampus and Protects Cognitive Impairment in Streptozotocin-Induced Diabetic Rats. ACS Chem Neurosci 2021; 12:4587-4597. [PMID: 34860003 DOI: 10.1021/acschemneuro.1c00712] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The phytogenic flavanol component of the plant Rhus verniciflua Stokes is fustin which is implicated in various disease aliments and has promising therapeutic efficacy and a long history of its uses in the Indian medicinal system. The present study investigated the ameliorative effect of fustin in streptozotocin (STZ) induced cognitive impairments in the diabetic animal paradigm. A total of five different animal groups were used for the present study.The preclinical efficacy of fustin at 50 mg/kg and 100 mg/kg was studied in diabetic male rats by employing a 35-day study design. In the present investigation the Morris water maze test (MWM) and elevated plus maze (EPM) test were employed as behavioral paradigms for the assessment of memory impairments. The study design also carried out certain biochemical parameters which include glutathione (GSH), superoxide dismutase (SOD), catalase activity (CAT), malondialdehyde (MDA), nitric oxide (NO), relative interleukin-6 (IL-6), and IL-1B in samples obtained from cerebral cortex and hippocampus. The behavioral parameters with MWM and EPM were significant restored in fustin treatment groups as compared to elevated levels in the diabetic control group. Furthermore, fustin significantly improved the altered levels of several biochemical parameters for cognitive dysfunction such as GSH, SOD, CAT, MDA, NO, and relative IL-6 and IL-1B compared to a diabetic control group. The present investigation highlights certain preclinical pieces of evidence that strongly indicate that fustin might restore the normal cognitive function in the experimental animal paradigm.
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Affiliation(s)
- Muhammad Afzal
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka, Aljouf-72341, Saudi Arabia
| | - Fahad A. Al-Abbasi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Syed Sarim Imam
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammed M. Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Saudi Arabia
| | - Waleed Hassan Almalki
- Department of Pharmacology, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Muhammad Shahid Nadeem
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Nadeem Sayyed
- Clinical Research Department, Meril Life Sciences Pvt. Ltd., Vapi, Gujurat 396191, India
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14
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Shi JJ, Liu HF, Hu T, Gao X, Zhang YB, Li WR, Wang Q, Zhang SJ, Tang D, Chen YB. Danggui-Shaoyao-San improves cognitive impairment through inhibiting O-GlcNAc-modification of estrogen α receptor in female db/db mice. JOURNAL OF ETHNOPHARMACOLOGY 2021; 281:114562. [PMID: 34438027 DOI: 10.1016/j.jep.2021.114562] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 07/29/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The traditional Chinese medicine formula Danggui-Shaoyao-San (DSS) has been reported to show therapeutic effect on dementia. AIM OF THE STUDY The present study aims to investigate whether DSS treatment could alleviate diabetes-induced cognitive dysfunction, and explores its neuroprotective mechanism on db/db mice. MATERIALS AND METHODS The female db/db mice were randomly divided into model group, DSS low-dose group and DSS high-dose group. Homologous female db/m mice were used as the control group. DSS was intragastric administrated for 15 weeks. Glucose tolerance, insulin tolerance, blood glucose and blood lipid levels were measured. Morris water maze was used to measure spatial learning and memory ability in mice. Nissl staining and Tunel staining were used to measure the changes of brain neurons, and ELISA kits were used to measure levels of inflammatory mediators (PGE2, TXB2 and LTB4). The kits detected oxidative stress (MDA, SOD, CAT, GSH-PX), nitrosative stress (NO, iNOS, TNOS) and glucose metabolism (LDH, PK, HK) levels. Western blot and immunofluorescence detected neurotrophic factors (PSD95, BDNF, NGF and SYN), apoptosis (Bcl-2, Bax, Bcl-xl, Caspase-3) and changes of ERα, O-GlcNAc, OGT, OGA levels. RESULTS Morris water maze results showed that DSS could improve the learning and memory abilities of female db/db mice. Nissl staining showed that DSS could relieve hippocampal neurons damage of db/db mice. In addition, the serological tests showed that DSS could improve the impaired glucose tolerance and insulin resistance, while reduce hyperlipemia in db/db mice. Besides, DSS treatment increased the activities of SOD, GSH-PX, and CAT, and reduced MDA, NO, iNOs, tNOS, PGE2, TXB2 and LTB4 levels. Western blot and immunofluorescence results of PSD95, BDNF, NGF, and SYN showed that DSS could improve the expressions of neurotrophic factors. Meanwhile, Tunel staning and Western blot (Bcl-2, Bax, Bcl-xl, Caspase-3) results indicated that DSS could reduce neuronal apoptosis. Finally, Western blot (ERα, O-GlcNAc, OGA, and OGT) and immunofluorescence (ERα and O-GlcNAc) results indicated that DSS could increase the levels of ERα and OGA, decrease the levels of O-GlcNAc and OGT. CONCLUSION DSS alleviate DE might be related to improve the abnormal O-GlcNAc-modification of ERα.
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Affiliation(s)
- Jing-Jing Shi
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China; Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hao-Fei Liu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China; Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Tian Hu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China; Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xin Gao
- Laboratory of Experimental Animal, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yong-Bin Zhang
- Laboratory of Experimental Animal, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wei-Rong Li
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China; Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qi Wang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China; Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shi-Jie Zhang
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China; Department of Neurology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China; Postdoctoral Research Station of Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China.
| | - Dan Tang
- Key Laboratory of Digital Quality Evaluation of Chinese Materia Medica of State Administration of TCM and Engineering & Technology Research Center for Chinese Materia Medica Quality of Guangdong Province, Guangdong Pharmaceutical University, Guangzhou, China.
| | - Yun-Bo Chen
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China; Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China.
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15
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Bhusal A, Lee WH, Suk K. Lipocalin-2 in Diabetic Complications of the Nervous System: Physiology, Pathology, and Beyond. Front Physiol 2021; 12:638112. [PMID: 33613327 PMCID: PMC7892766 DOI: 10.3389/fphys.2021.638112] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 01/19/2021] [Indexed: 01/04/2023] Open
Abstract
Lipocalin-2 (LCN2) is a 25 kDa secreted protein that belongs to the family of lipocalins, a group of transporters of small hydrophobic molecules such as iron, fatty acids, steroids, and lipopolysaccharide in circulation. LCN2 was previously found to be involved in iron delivery, pointing toward a potential role for LCN2 in immunity. This idea was further validated when LCN2 was found to limit bacterial growth during infections in mice by sequestering iron-laden siderophores. Recently, LCN2 was also identified as a critical regulator of energy metabolism, glucose and lipid homeostasis, and insulin function. Furthermore, studies using Lcn2 knockout mice suggest an important role for LCN2 in several biobehavioral responses, including cognition, emotion, anxiety, and feeding behavior. Owing to its expression and influence on multiple metabolic and neurological functions, there has emerged a great deal of interest in the study of relationships between LCN2 and neurometabolic complications. Thorough investigation has demonstrated that LCN2 is involved in several neurodegenerative diseases, while more recent studies have shown that LCN2 is also instrumental for the progression of diabetic complications like encephalopathy and peripheral neuropathy. Preliminary findings have shown that LCN2 is also a promising drug target and diagnostic marker for the treatment of neuropathic complications from diabetes. In particular, future translational research related to LCN2, such as the development of small-molecule inhibitors or neutralizing antibodies against LCN2, appears essential for exploring its potential as a therapeutic target.
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Affiliation(s)
- Anup Bhusal
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, South Korea.,BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Won-Ha Lee
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, South Korea
| | - Kyoungho Suk
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, South Korea.,BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, South Korea.,Brain Science and Engineering Institute, Kyungpook National University, Daegu, South Korea
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16
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Geraets AFJ, Köhler S, Muzambi R, Schalkwijk CG, Oenema A, Eussen SJPM, Dagnelie PC, Stehouwer CDA, Schaper NC, Henry RMA, van der Kallen CJH, Wesselius A, Koster A, Verhey FRJ, Schram MT. The association of hyperglycaemia and insulin resistance with incident depressive symptoms over 4 years of follow-up: The Maastricht Study. Diabetologia 2020; 63:2315-2328. [PMID: 32757152 PMCID: PMC7527373 DOI: 10.1007/s00125-020-05247-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 06/22/2020] [Indexed: 12/19/2022]
Abstract
AIMS/HYPOTHESIS Depression is twice as common in individuals with type 2 diabetes as in the general population. However, it remains unclear whether hyperglycaemia and insulin resistance are directly involved in the aetiology of depression. Therefore, we investigated the association of markers of hyperglycaemia and insulin resistance, measured as continuous variables, with incident depressive symptoms over 4 years of follow-up. METHODS We used data from the longitudinal population-based Maastricht Study (n = 2848; mean age 59.9 ± 8.1 years, 48.8% women, 265 incident depression cases, 10,932 person-years of follow-up). We assessed hyperglycaemia by fasting and 2 h post-load OGTT glucose levels, HbA1c and skin autofluorescence (reflecting AGEs) at baseline. We used the Matsuda insulin sensitivity index and HOMA-IR to calculate insulin resistance at baseline. Depressive symptoms (nine-item Patient Health Questionnaire score ≥10) were assessed at baseline and annually over 4 years. We used Cox regression analyses, and adjusted for demographic, cardiovascular and lifestyle risk factors. RESULTS Fasting plasma glucose, 2 h post-load glucose and HbA1c levels were associated with an increased risk for incident depressive symptoms after full adjustment (HR 1.20 [95% CI 1.08, 1.33]; HR 1.25 [1.08, 1.44]; and HR 1.22 [1.09, 1.37] per SD, respectively), while skin autofluorescence, insulin sensitivity index and HOMA-IR were not (HR 0.99 [0.86, 1.13]; HR 1.02 [0.85, 1.25]; and HR 0.93 [0.81, 1.08], per SD, respectively). CONCLUSIONS/INTERPRETATION The observed temporal association between hyperglycaemia and incident depressive symptoms in this study supports the presence of a mechanistic link between hyperglycaemia and the development of depressive symptoms. Graphical abstract.
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Affiliation(s)
- Anouk F J Geraets
- Department of Psychiatry and Neuropsychology, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- Department of Internal Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School of Mental Health and Neuroscience (MHeNs), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
- School for Cardiovascular Diseases (CARIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Sebastian Köhler
- Department of Psychiatry and Neuropsychology, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School of Mental Health and Neuroscience (MHeNs), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Rutendo Muzambi
- Faculty of Epidemiology & Population Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Casper G Schalkwijk
- Department of Internal Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School for Cardiovascular Diseases (CARIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Anke Oenema
- Department of Health Promotion, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- Care and Public Health Research Institute (CAPHRI), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
- School of Nutrition and Translational Research in Metabolism (NUTRIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Simone J P M Eussen
- Care and Public Health Research Institute (CAPHRI), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
- Department of Epidemiology, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - Pieter C Dagnelie
- Department of Internal Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School for Cardiovascular Diseases (CARIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Coen D A Stehouwer
- Department of Internal Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School for Cardiovascular Diseases (CARIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Nicolaas C Schaper
- Department of Internal Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School for Cardiovascular Diseases (CARIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Ronald M A Henry
- Department of Internal Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School for Cardiovascular Diseases (CARIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
- Heart and Vascular Center, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - Carla J H van der Kallen
- Department of Internal Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School for Cardiovascular Diseases (CARIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Anke Wesselius
- School of Nutrition and Translational Research in Metabolism (NUTRIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
- Department of Genetics & Cell Biology, Complex Genetics, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - Annemarie Koster
- Care and Public Health Research Institute (CAPHRI), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
- Department of Social Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - Frans R J Verhey
- Department of Psychiatry and Neuropsychology, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
- School of Mental Health and Neuroscience (MHeNs), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Miranda T Schram
- Department of Psychiatry and Neuropsychology, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands.
- Department of Internal Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands.
- School of Mental Health and Neuroscience (MHeNs), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands.
- School for Cardiovascular Diseases (CARIM), Faculty of Health, Medicine & Life Sciences, Maastricht University, Maastricht, the Netherlands.
- Heart and Vascular Center, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands.
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17
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Pattarachotanant N, Tencomnao T. Citrus hystrix Extracts Protect Human Neuronal Cells against High Glucose-Induced Senescence. Pharmaceuticals (Basel) 2020; 13:ph13100283. [PMID: 33007805 PMCID: PMC7600454 DOI: 10.3390/ph13100283] [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: 08/05/2020] [Revised: 09/23/2020] [Accepted: 09/23/2020] [Indexed: 12/17/2022] Open
Abstract
Citrus hystrix (CH) is a beneficial plant utilized in traditional folk medicine to relieve various health ailments. The antisenescent mechanisms of CH extracts were investigated using human neuroblastoma cells (SH-SY5Y). Phytochemical contents and antioxidant activities of CH extracts were analyzed using a gas chromatograph–mass spectrometer (GC-MS), 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) assay and 2,2′-azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) assay. Effects of CH extracts on high glucose-induced cytotoxicity, reactive oxygen species (ROS) generation, cell cycle arrest and cell cycle-associated proteins were assessed using a 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide tetrazolium (MTT) assay, non-fluorescent 2′, 7′-dichloro-dihydrofluorescein diacetate (H2DCFDA) assay, flow cytometer and Western blot. The extracts protected neuronal senescence by inhibiting ROS generation. CH extracts induced cell cycle progression by releasing senescent cells from the G1 phase arrest. As the Western blot confirmed, the mechanism involved in cell cycle progression was associated with the downregulation of cyclin D1, phospho-cell division cycle 2 (pcdc2) and phospho-Retinoblastoma (pRb) proteins. Furthermore, the Western blot showed that extracts increased Surtuin 1 (SIRT1) expression by increasing the phosphorylation of Glyceraldehyde 3-phosphate dehydrogenase (GAPDH). Collectively, CH extracts could protect high glucose-induced human neuronal senescence by inducing cell cycle progression and up-regulation of SIRT1, thus leading to the improvement of the neuronal cell functions.
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Affiliation(s)
- Nattaporn Pattarachotanant
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand;
- Age-Related Inflammation and Degeneration Research Unit, Chulalongkorn University, Bangkok 10330, Thailand
| | - Tewin Tencomnao
- Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok 10330, Thailand;
- Age-Related Inflammation and Degeneration Research Unit, Chulalongkorn University, Bangkok 10330, Thailand
- Correspondence: ; Tel.: +66-2-218-1533
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Griffith CM, Macklin LN, Cai Y, Sharp AA, Yan XX, Reagan LP, Strader AD, Rose GM, Patrylo PR. Impaired Glucose Tolerance and Reduced Plasma Insulin Precede Decreased AKT Phosphorylation and GLUT3 Translocation in the Hippocampus of Old 3xTg-AD Mice. J Alzheimers Dis 2020; 68:809-837. [PMID: 30775979 DOI: 10.3233/jad-180707] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Several studies have demonstrated that mouse models of Alzheimer's disease (AD) can exhibit impaired peripheral glucose tolerance. Further, in the APP/PS1 mouse model, this is observed prior to the appearance of AD-related neuropathology (e.g., amyloid-β plaques; Aβ) or cognitive impairment. In the current study, we examined whether impaired glucose tolerance also preceded AD-like changes in the triple transgenic model of AD (3xTg-AD). Glucose tolerance testing (GTT), insulin ELISAs, and insulin tolerance testing (ITT) were performed at ages prior to (1-3 months and 6-8 months old) and post-pathology (16-18 months old). Additionally, we examined for altered insulin signaling in the hippocampus. Western blots were used to evaluate the two-primary insulin signaling pathways: PI3K/AKT and MAPK/ERK. Since the PI3K/AKT pathway affects several downstream targets associated with metabolism (e.g., GSK3, glucose transporters), western blots were used to examine possible alterations in the expression, translocation, or activation of these targets. We found that 3xTg-AD mice display impaired glucose tolerance as early as 1 month of age, concomitant with a decrease in plasma insulin levels well prior to the detection of plaques (∼14 months old), aggregates of hyperphosphorylated tau (∼18 months old), and cognitive decline (≥18 months old). These alterations in peripheral metabolism were seen at all time points examined. In comparison, PI3K/AKT, but not MAPK/ERK, signaling was altered in the hippocampus only in 18-20-month-old 3xTg-AD mice, a time point at which there was a reduction in GLUT3 translocation to the plasma membrane. Taken together, our results provide further evidence that disruptions in energy metabolism may represent a foundational step in the development of AD.
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Affiliation(s)
- Chelsea M Griffith
- Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Center for Integrated Research in Cognitive and Neural Sciences, Southern Illinois University, Carbondale, IL, USA
| | - Lauren N Macklin
- Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Center for Integrated Research in Cognitive and Neural Sciences, Southern Illinois University, Carbondale, IL, USA
| | - Yan Cai
- Department of Anatomy and Neurobiology, Central South University Xiangya School of Medicine, Changsha, Hunan, China.,Key Laboratory of Hunan Province in Neurodegenerative Disorders, Changsha, Hunan, China
| | - Andrew A Sharp
- Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Center for Integrated Research in Cognitive and Neural Sciences, Southern Illinois University, Carbondale, IL, USA
| | - Xiao-Xin Yan
- Department of Anatomy and Neurobiology, Central South University Xiangya School of Medicine, Changsha, Hunan, China.,Key Laboratory of Hunan Province in Neurodegenerative Disorders, Changsha, Hunan, China
| | - Lawrence P Reagan
- Department of Pharmacology, Physiology & Neuroscience, University of South Carolina, Columbia, SC, USA.,WJB Dorn Veterans Affairs Medical Center, Columbia, SC, USA
| | - April D Strader
- Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Center for Integrated Research in Cognitive and Neural Sciences, Southern Illinois University, Carbondale, IL, USA
| | - Gregory M Rose
- Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Center for Integrated Research in Cognitive and Neural Sciences, Southern Illinois University, Carbondale, IL, USA
| | - Peter R Patrylo
- Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, IL, USA.,Center for Integrated Research in Cognitive and Neural Sciences, Southern Illinois University, Carbondale, IL, USA
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19
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Mejido DC, Peny JA, Vieira MN, Ferreira ST, De Felice FG. Insulin and leptin as potential cognitive enhancers in metabolic disorders and Alzheimer's disease. Neuropharmacology 2020; 171:108115. [DOI: 10.1016/j.neuropharm.2020.108115] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 03/30/2020] [Accepted: 04/20/2020] [Indexed: 02/08/2023]
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20
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Hu T, Shi JJ, Fang J, Wang Q, Chen YB, Zhang SJ. Quercetin ameliorates diabetic encephalopathy through SIRT1/ER stress pathway in db/db mice. Aging (Albany NY) 2020; 12:7015-7029. [PMID: 32312941 PMCID: PMC7202537 DOI: 10.18632/aging.103059] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/27/2020] [Indexed: 01/01/2023]
Abstract
Studies have shown that diabetes is an important risk factor for cognitive dysfunction, also called diabetic encephalopathy (DE). Quercetin has been reported to be effective in improving cognitive dysfunction in DE. But its detailed mechanism is still ambiguous. In this study, we used db/db mice to investigate whether quercetin could activate SIRT1 and inhibit ER pathways to improve DE. Behavioral tests (Morris water maze and new objects) showed that quercetin (70 mg/kg) can effectively improve the learning and memory ability in db/db mice. OGTT and ITT tests indicated that quercetin could alleviate impaired glucose tolerance and insulin resistance in db/db mice. Western blot analysis and Nissl staining showed that quercetin can improve the expression of nerve and synapse-associated proteins (PSD93, PSD95, NGF and BDNF) and inhibit neurodegeneration. Meanwhile, quercetin up-regulates SIRT1 protein expression and inhibits the expression of ER signaling pathway-related proteins (PERK, IRE-1α, ATF6, eIF2α, BIP and PDI). In addition, oxidative stress levels were significantly reduced after quercetin treatment. In conclusion, current experimental results indicated that SIRT1/ER stress is a promising mechanism involved in quercetin-treated diabetic encephalopathy.
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Affiliation(s)
- Tian Hu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jing-Jing Shi
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jiansong Fang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qi Wang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yun-Bo Chen
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shi-Jie Zhang
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
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21
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Hu T, Lu XY, Shi JJ, Liu XQ, Chen QB, Wang Q, Chen YB, Zhang SJ. Quercetin protects against diabetic encephalopathy via SIRT1/NLRP3 pathway in db/db mice. J Cell Mol Med 2020; 24:3449-3459. [PMID: 32000299 PMCID: PMC7131910 DOI: 10.1111/jcmm.15026] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 12/09/2019] [Accepted: 01/06/2020] [Indexed: 12/29/2022] Open
Abstract
Epidemiological studies have found that diabetes and cognitive dysfunction are closely related. Quercetin has been certified with the effect on improving diabetes mellitus (DM) and cognitive impairment. However, the effect and related mechanism of quercetin on diabetic encephalopathy (DE) are still ambiguous. In this study, we used the db/db mice (diabetic model) to discover whether quercetin could improve DE through the Sirtuin1/NLRP3 (NOD‐, LRR‐ and pyrin domain‐containing 3) pathway. Behavioural results (Morris water maze and new object recognition tests) showed that quercetin (70 mg/kg) improved the learning and memory. Furthermore, quercetin alleviated insulin resistance and the level of fasting blood glucose. Besides, Western blot analysis also showed that quercetin increased the protein expressions of nerve‐ and synapse‐related protein, including postsynapticdensity 93 (PSD93), postsynapticdensity 95 (PSD95), brain‐derived neurotrophic factor (BDNF) and nerve growth factor (NGF) in the brain of db/db mice. Quercetin also increased the protein expression of SIRT1 and decreased the expression of NLRP3 inflammation‐related proteins, including NLRP3, the adaptor protein ASC and cleaved Caspase‐1, the pro‐inflammatory cytokines IL‐1β and IL‐18. In conclusion, the present results indicate that the SIRT1/NLRP3 pathway may be a crucial mechanism for the neuroprotective effect of quercetin against DE.
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Affiliation(s)
- Tian Hu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.,Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xin-Yi Lu
- Biological Resource Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jing-Jing Shi
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.,Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiao-Qi Liu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.,Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qu-Bo Chen
- Biological Resource Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qi Wang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.,Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yun-Bo Chen
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.,Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shi-Jie Zhang
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
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22
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Jamalnia S, Javanmardifard S, Akbari H, Sadeghi E, Bijani M. Association Between Cognitive Impairment and Blood Pressure Among Patients with Type II Diabetes Mellitus in Southern Iran. Diabetes Metab Syndr Obes 2020; 13:289-296. [PMID: 32104025 PMCID: PMC7008183 DOI: 10.2147/dmso.s238247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 01/15/2020] [Indexed: 12/15/2022] Open
Abstract
PURPOSE Both type 2 diabetes mellitus (T2DM) and hypertension are regarded as life-threatening diseases known to be risk factors for vascular diseases. They may be associated with the increased risk of cognitive impairment (CI), although there are conflicting data relating hypertension to the risk of CI. Therefore, this study aimed to explore the probable association between hypertension and CI in patients with T2DM. PATIENTS AND METHODS This cross-sectional study assessed the degree of CI of a total of 350 patients with T2DM using the Mini-Mental State Examination (MMSE). In clinical examinations, the mean of the first, second, and third measurements of systolic and diastolic blood pressure (SBP and DBP) was recorded. RESULTS The mean of subjects' MMSE scores was 25.48 ± 3.73. Additionally, the means of SBPSs and DBPs were found to be 118.50 ± 17.27 and 73.47 ± 10.25 mmHg, respectively. The Spearman correlation coefficient showed a mild, significant, negative correlation between MMSE scores and those of SBP (r = -0.199, p <0.001) and DBP (r = -0.233, p <0.001). Accordingly, a 1-unit increase in one's SBP would lead to a significant rise in mild CI (2.8%) in comparison with subjects who have normal CIs. However, it was shown that if one's DBP increased by 1 unit, the odds of mild CI occurring would increase significantly by 6.7% compared with those who have normal CIs. CONCLUSION The present findings revealed that hypertension might be related to the development of CI in people with a diabetic condition, thus emphasizing the fact that the prevention and treatment of these highly prevalent diseases assume the utmost significance.
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Affiliation(s)
- Sheida Jamalnia
- Medical Journalism Department, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sorur Javanmardifard
- School of Nursing and Midwifery, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hamed Akbari
- Endocrinology and Metabolism Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
- Department of Biochemistry, Afzalipur Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Erfan Sadeghi
- Noncommunicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran
- Department of Biostatistics and Epidemiology, Faculty of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mostafa Bijani
- Department of Medical Surgical Nursing, Fasa University of Medical Sciences, Fasa, Iran
- Correspondence: Mostafa Bijani Department of Medical Surgical Nursing, Fasa University of Medical Sciences, Fasa86688-74616, IranTel +989173308451Fax +98 7153357091 Email
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23
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Navarro-Flores E, Pérez-Ros P, Martínez-Arnau FM, Julían-Rochina I, Cauli O. Neuro-Psychiatric Alterations in Patients with Diabetic Foot Syndrome. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2019; 18:598-608. [DOI: 10.2174/1871527318666191002094406] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 08/16/2019] [Accepted: 08/19/2019] [Indexed: 12/18/2022]
Abstract
Diabetic Foot Syndrome (DFS) is a common long-term complication of diabetes mellitus.
DFS has recently been associated with adverse effects on brain function which could further impair the
quality of life of these patients, as well as increase the social and economic burden, morbidity, and
premature mortality of the disease. The current knowledge of neuropsychiatric alterations e.g. cognitive
impairment, gait disorder, depression, and quality of life in patients with diabetic foot syndrome is
summarized. The cognitive domains altered in DFS are executive function, memory, and psychomotor
speed. Compared to diabetic patients without DFS, individuals with DFS present gait alterations
caused by changes in several spatio-temporal parameters and lower-limb kinematics. The increased
rates of anxiety and depression among patients with DFS were related to several factors, including female
sex, a smoking habit, age under 50 years, and foot ulceration exceeding 7 months' duration. The
role of infections and the use of preventive antimicrobial treatment need further studies regarding their
effect on comorbid neuropsychiatric disorders. The care of these patients should include the prevention,
detection and treatment of these neuropsychiatric disorders in order to improve their quality of
life.
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Affiliation(s)
- Emmanuel Navarro-Flores
- Frailty and cognitive impairment organized group (FROG), University of Valencia, Valencia, Spain
| | - Pilar Pérez-Ros
- Frailty and cognitive impairment organized group (FROG), University of Valencia, Valencia, Spain
| | | | - Iván Julían-Rochina
- Frailty and cognitive impairment organized group (FROG), University of Valencia, Valencia, Spain
| | - Omar Cauli
- Frailty and cognitive impairment organized group (FROG), University of Valencia, Valencia, Spain
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24
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Jolivalt CG, Marquez A, Quach D, Navarro Diaz MC, Anaya C, Kifle B, Muttalib N, Sanchez G, Guernsey L, Hefferan M, Smith DR, Fernyhough P, Johe K, Calcutt NA. Amelioration of Both Central and Peripheral Neuropathy in Mouse Models of Type 1 and Type 2 Diabetes by the Neurogenic Molecule NSI-189. Diabetes 2019; 68:2143-2154. [PMID: 31492662 PMCID: PMC6804627 DOI: 10.2337/db19-0271] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 08/26/2019] [Indexed: 02/06/2023]
Abstract
While peripheral neuropathy is the most common complication of long-term diabetes, cognitive deficits associated with encephalopathy and myelopathy also occur. Diabetes is a risk factor for Alzheimer disease (AD) and increases the risk of progression from mild cognitive impairment to AD. The only current recommendation for preventing or slowing the progression of peripheral neuropathy is to maintain close glycemic control, while there is no recommendation for central nervous system disorders. NSI-189 is a new chemical entity that when orally administered promotes neurogenesis in the adult hippocampus, increases hippocampal volume, enhances synaptic plasticity, and reduces cognitive dysfunction. To establish the potential for impact on peripheral neuropathy, we first showed that NSI-189 enhances neurite outgrowth and mitochondrial functions in cultured adult rat primary sensory neurons. Oral delivery of NSI-189 to murine models of type 1 (female) and type 2 (male) diabetes prevented multiple functional and structural indices of small and large fiber peripheral neuropathy, increased hippocampal neurogenesis, synaptic markers and volume, and protected long-term memory. NSI-189 also halted progression of established peripheral and central neuropathy. NSI-189, which is currently in clinical trials for treatment of major depressive disorder, offers the opportunity for the development of a single therapeutic agent against multiple indices of central and peripheral neuropathy.
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Affiliation(s)
- Corinne G Jolivalt
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Alexandra Marquez
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | | | | | - Carlos Anaya
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Betelhem Kifle
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Nabeel Muttalib
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Gabriela Sanchez
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | - Lucy Guernsey
- Department of Pathology, University of California, San Diego, La Jolla, CA
| | | | - Darrel R Smith
- St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada
| | - Paul Fernyhough
- St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada
- Department of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, Manitoba, Canada
| | | | - Nigel A Calcutt
- Department of Pathology, University of California, San Diego, La Jolla, CA
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25
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Yang HW, Son M, Choi J, Oh S, Jeon YJ, Byun K, Ryu B. Effect of Ishophloroglucin A, A Component of Ishige okamurae, on Glucose Homeostasis in the Pancreas and Muscle of High Fat Diet-Fed Mice. Mar Drugs 2019; 17:E608. [PMID: 31731426 PMCID: PMC6891760 DOI: 10.3390/md17110608] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 10/16/2019] [Accepted: 10/21/2019] [Indexed: 12/24/2022] Open
Abstract
Ishophloroglucin A (IPA), a component of Ishige okamurae (IO), was previously evaluated to standardize the antidiabetic potency of IO. However, the potential of IPA as a functional food for diabetes prevention has not yet been evaluated. Here, we investigated if 1.35 mg/kg IPA, which is the equivalent content of IPA in 75 mg/kg IO, improved glucose homeostasis in high-fat diet (HFD)-induced diabetes after 12 weeks of treatment. IPA significantly ameliorated glucose intolerance, reducing fasting glucose levels as well as 2 h glucose levels in HFD mice. In addition, IPA exerted a protective effect on the pancreatic function in HFD mice via pancreatic β-cells and C-peptide. The level of glucose transporter 4 (GLUT4) in the muscles of HFD mice was stimulated by IPA intake. Our results suggested that IPA, which is a component of IO, can improve glucose homeostasis via GLUT4 in the muscles of HFD mice. IO may be used as a functional food for the prevention of diabetes.
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Affiliation(s)
- Hye-Won Yang
- Department of Marine Life Science, School of Marine Biomedical Sciences, Jeju National University, 1 Ara 1-dong, Jejudaehak-ro, Jeju 63243, Korea; (H.-W.Y.); (Y.-J.J.)
| | - Myeongjoo Son
- Department of Anatomy & Cell Biology, Gachon University College of Medicine, Incheon 21936, Korea; (M.S.); (J.C.)
- Functional Cellular Networks Laboratory, College of Medicine, Department of Medicine, Graduate School and Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21999, Korea;
| | - Junwon Choi
- Department of Anatomy & Cell Biology, Gachon University College of Medicine, Incheon 21936, Korea; (M.S.); (J.C.)
- Functional Cellular Networks Laboratory, College of Medicine, Department of Medicine, Graduate School and Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21999, Korea;
| | - Seyeon Oh
- Functional Cellular Networks Laboratory, College of Medicine, Department of Medicine, Graduate School and Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21999, Korea;
| | - You-Jin Jeon
- Department of Marine Life Science, School of Marine Biomedical Sciences, Jeju National University, 1 Ara 1-dong, Jejudaehak-ro, Jeju 63243, Korea; (H.-W.Y.); (Y.-J.J.)
- Marine Science Institute, Jeju National University, Jeju 63333, Korea
| | - Kyunghee Byun
- Department of Anatomy & Cell Biology, Gachon University College of Medicine, Incheon 21936, Korea; (M.S.); (J.C.)
- Functional Cellular Networks Laboratory, College of Medicine, Department of Medicine, Graduate School and Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21999, Korea;
| | - BoMi Ryu
- Department of Marine Life Science, School of Marine Biomedical Sciences, Jeju National University, 1 Ara 1-dong, Jejudaehak-ro, Jeju 63243, Korea; (H.-W.Y.); (Y.-J.J.)
- Marine Science Institute, Jeju National University, Jeju 63333, Korea
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26
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Wu L, Chen Y, Wang CY, Tang YY, Huang HL, Kang X, Li X, Xie YR, Tang XQ. Hydrogen Sulfide Inhibits High Glucose-Induced Neuronal Senescence by Improving Autophagic Flux via Up-regulation of SIRT1. Front Mol Neurosci 2019; 12:194. [PMID: 31481873 PMCID: PMC6710442 DOI: 10.3389/fnmol.2019.00194] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 07/25/2019] [Indexed: 01/31/2023] Open
Abstract
Hyperglycemia, a key characteristic and risk factor for diabetes mellitus (DM), causes neuronal senescence. Hydrogen sulfide (H2S) is a novel neuroprotectant. The present work was to investigate the potential effect of H2S on hyperglycemia-induced neuronal senescence and the underlying mechanisms. We found that NaHS, a donor of H2S, inhibited high glucose (HG)-induced cellular senescence in HT22 cells (an immortalized mouse hippocampal cell line), as evidenced by a decrease in the number of senescence associated-β-galactosidase (SA-β-gal) positive cells, increase in the growth of cells, and down-regulations of senescence mark proteins, p16INK4a and p21CIP1. NaHS improved the autophagic flux, which is judged by a decrease in the amount of intracellular autophagosome as well as up-regulations of LC3II/I and P62 in HG-exposed HT22 cells. Furthermore, blocked autophagic flux by chloroquine (CQ) significantly abolished NaHS-exerted improvement in the autophagic flux and suppression in the cellular senescence of GH-exposed HT22 cells, which indicated that H2S antagonizes HG-induced neuronal senescence by promoting autophagic flux. We also found that NaHS up-regulated the expression of silent mating type information regulation 2 homolog 1 (SIRT1), an important anti-aging protein, in HG-exposed HT22 cells. Furthermore, inhibition of SIRT1 by sirtinol reversed the protection of H2S against HG-induced autophagic flux blockade and cellular senescence in HT22 cells. These data indicated that H2S protects HT22 cells against HG-induced neuronal senescence by improving autophagic flux via up-regulation of SIRT1, suggesting H2S as a potential treatment strategy for hyperglycemia-induced neuronal senescence and neurotoxicity.
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Affiliation(s)
- Lei Wu
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Ying Chen
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China.,Department of Pharmacology, The Central Hospital of Hengyang, Hengyang, China
| | - Chun-Yan Wang
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Yi-Yun Tang
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China
| | - Hong-Lin Huang
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China
| | - Xuan Kang
- Institute of Neurology, the First Affiliated Hospital, University of South China, Hengyang, China
| | - Xiang Li
- Institute of Neurology, the First Affiliated Hospital, University of South China, Hengyang, China
| | - Yu-Rong Xie
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, China
| | - Xiao-Qing Tang
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, University of South China, Hengyang, China.,Institute of Neurology, the First Affiliated Hospital, University of South China, Hengyang, China
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Dybjer E, Nilsson PM, Engström G, Helmer C, Nägga K. Pre-diabetes and diabetes are independently associated with adverse cognitive test results: a cross-sectional, population-based study. BMC Endocr Disord 2018; 18:91. [PMID: 30514382 PMCID: PMC6278035 DOI: 10.1186/s12902-018-0318-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 11/20/2018] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Diabetes is a risk factor for cognitive impairment, but whether there is also a link between pre-diabetes and cognitive dysfunction is not yet fully established. The aim of this observational study was to investigate associations between pre-diabetes/diabetes and cognitive test results, and also between glucose levels measured during the Oral Glucose Tolerance Test (OGTT) and cognitive outcomes. METHODS During 2007-2012, in all 2994 people (mean age 72 years), residing in Malmö, Sweden, underwent a clinical examination including the OGTT, cardiovascular measurements including carotid-femoral pulse wave velocity (c-f PWV) and two cognitive tests, the Mini Mental State Examination (MMSE), measuring global cognitive function, and A Quick Test of Cognitive Speed (AQT), measuring processing speed and executive functioning. Regression analyses were performed to investigate associations between: (a) categories of normal or impaired glucose metabolism, and (b) OGTT measurements, respectively, as exposure variables and cognitive test results as outcomes. Adjustments were made for demographics, lifestyle factors and cardiovascular risk factors. RESULTS Participants with pre-diabetes and diabetes scored slightly worse cognitive test results compared to the control group. Results of participants with a long disease duration of diabetes since the baseline examination 13 years earlier were poorer (mean AQT test time 17.8 s slower than controls, p < 0.001). Linear associations were found between fasting and 2-h glucose and cognitive outcomes in the whole population, but also in a sub-analysis including only individuals without diabetes (for 2-h glucose and MMSE results: B = - 2.961, p = 0.005). Associations were stronger for older or less physically active individuals. When adjusting for cardiovascular risk factors, most correlations were non-significant. CONCLUSIONS Pre-diabetes and diabetes are associated with minor deficits in global cognitive function, processing speed and executive functioning. Long-standing diabetes is associated with bigger deficits. There appears to be a continuous inverse correlation between glucose levels and cognitive test results, also for people without diabetes. Associations are stronger in older and less physically active individuals. Cardiovascular factors are important mediating factors in the pathway between diabetes and cognitive dysfunction.
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Affiliation(s)
- Elin Dybjer
- Department of Clinical Sciences, Lund University, Clinical Research Centre, Skane University Hospital, S-20502 Malmö, Sweden
| | - Peter M. Nilsson
- Department of Clinical Sciences, Lund University, Clinical Research Centre, Skane University Hospital, S-20502 Malmö, Sweden
| | - Gunnar Engström
- Department of Clinical Sciences, Lund University, Clinical Research Centre, Skane University Hospital, S-20502 Malmö, Sweden
| | - Catherine Helmer
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, team LEHA, UMR 1219, F-33000 Bordeaux, France
| | - Katarina Nägga
- Department of Acute Internal Medicine and Geriatrics, Linköping University, S-581 85 Linköping, Sweden
- Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Lund University, S-205 02 Malmö, Sweden
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28
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Therapeutic potential of curcumin in diabetic complications. Pharmacol Res 2018; 136:181-193. [DOI: 10.1016/j.phrs.2018.09.012] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/19/2018] [Indexed: 12/22/2022]
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29
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Rebolledo-Solleiro D, Fernández-Guasti A. Influence of sex and estrous cycle on blood glucose levels, body weight gain, and depressive-like behavior in streptozotocin-induced diabetic rats. Physiol Behav 2018; 194:560-567. [DOI: 10.1016/j.physbeh.2018.06.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 05/10/2018] [Accepted: 06/20/2018] [Indexed: 12/14/2022]
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Can ÖD, Üçel Uİ, Demir Özkay Ü, Ulupınar E. The Effect of Agomelatine Treatment on Diabetes-Induced Cognitive Impairments in Rats: Concomitant Alterations in the Hippocampal Neuron Numbers. Int J Mol Sci 2018; 19:ijms19082461. [PMID: 30127276 PMCID: PMC6121488 DOI: 10.3390/ijms19082461] [Citation(s) in RCA: 10] [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: 07/10/2018] [Revised: 08/05/2018] [Accepted: 08/17/2018] [Indexed: 12/30/2022] Open
Abstract
Researches that are related to the central nervous system complications of diabetes have indicated higher incidence of cognitive disorders in patients. Since the variety of nootropic drugs used in clinics is limited and none of them consistently improves the outcomes, new and effective drug alternatives are needed for the treatment of diabetes-induced cognitive disorders. Based on the nootropic potential of agomelatine, the promising efficacy of this drug on cognitive impairments of diabetic rats was investigated in the current study. Experimental diabetes model was induced by streptozotocin. After development of diabetes-related cognitive impairments in rats, agomelatine (40 and 80 mg/kg) was administrated orally for two weeks. Cognitive performance was assessed by Morris water-maze and passive avoidance tests. Then, the total numbers of neurons in both dentate gyrus and Cornu Ammonis (CA) 1–3 subfields of the hippocampus were estimated by the optical fractionator method. Agomelatine treatment induced notable enhancement in the learning and memory performance of diabetic rats. Moreover, it reversed the neuronal loss in the hippocampal subregions of diabetic animals. Obtained results suggest that agomelatine has a significant potential for the treatment of diabetes-induced cognitive impairments. However, therapeutic efficacy of this drug in diabetic patients suffering from cognitive dysfunctions needs to be confirmed by further clinical trials.
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Affiliation(s)
- Özgür Devrim Can
- Department of Pharmacology, Faculty of Pharmacy, Anadolu University, 26470 Eskişehir, Turkey.
| | - Umut İrfan Üçel
- Department of Pharmacology, Faculty of Pharmacy, Anadolu University, 26470 Eskişehir, Turkey.
| | - Ümide Demir Özkay
- Department of Pharmacology, Faculty of Pharmacy, Anadolu University, 26470 Eskişehir, Turkey.
| | - Emel Ulupınar
- Department of Anatomy, Faculty of Medicine, Eskisehir Osmangazi University, 26480 Eskisehir, Turkey.
- Interdisciplinary Neuroscience Department, Health Science Institute of Eskişehir Osmangazi University, 26480 Eskisehir, Turkey.
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31
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van Sloten T, Schram M. Understanding depression in type 2 diabetes: a biological approach in observational studies. F1000Res 2018; 7. [PMID: 30135724 PMCID: PMC6092903 DOI: 10.12688/f1000research.13898.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/10/2018] [Indexed: 12/27/2022] Open
Abstract
Depression is twice as common in type 2 diabetes as in the general population and is associated with adverse health outcomes. Growing evidence suggest that type 2 diabetes and depression share biological mechanisms. This brief commentary discusses current understanding of shared biological pathways, focussing on hyperglycaemia, (micro)vascular dysfunction, and low-grade inflammation. Although there is accumulating evidence that these pathways are involved in the link between type 2 diabetes and depression, direct evidence of their temporal associations is lacking because of a paucity of longitudinal studies that focus on the pathobiology of both type 2 diabetes and depression.
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Affiliation(s)
- Thomas van Sloten
- Department of Internal Medicine, Maastricht University Medical Centre, Maastricht, Netherlands.,CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht , Netherlands.,Departments of Epidemiology and Arterial Mechanics, INSERM U970 and Paris-Cardiovascular Research Center, Paris, France
| | - Miranda Schram
- Department of Internal Medicine, Maastricht University Medical Centre, Maastricht, Netherlands.,CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht , Netherlands.,Heart and Vascular Centre, Maastricht University Medical Centre, Maastricht , Netherlands
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32
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Huang D, Jiang QS, Yang JQ, Cui T, Wang NR, Du TT, Jiang XH. Simultaneous determination of nine analytes related to the pathogenesis of diabetic encephalopathy in diabetic rat cortex and hippocampus by HPLC-FLD. Biomed Chromatogr 2018; 32:e4338. [PMID: 30003560 DOI: 10.1002/bmc.4338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 06/21/2018] [Accepted: 07/04/2018] [Indexed: 10/28/2022]
Abstract
The determination of amino acids and monoamine with actions like neurotransmitters or modulators has become increasingly important for studying the relationship between the dysfunction of neurotransmitters and the pathogenesis of diabetic encephalopathy. Here, a high-performance liquid chromatography with fluorescence detection method was developed to simultaneously determine nine monoamines and amino acids including three excitatory neurotransmitters (aspartate, glutamate, and serotonin), four inhibitory neurotransmitters (glycine, γ-aminobutyric acid, taurine, dopamine), a precursor of 5-HT (tryptophan) and methionine using homoserine as the internal standard. The separation was performed on a BDS column with methanol-buffer solution of 35 mmol/L sodium acetate and 5 mmol/L citric acid (pH 6.0) using a simple gradient elution. Several parameters including specificity, precision, and recovery were validated after optimization of the analytical conditions. The developed method was successfully applied to determine the cortex and the hippocampus samples from Sprague-Dawley rats. Our results showed that various neurotransmitters involved in diabetes mellitus may tend to be differentially modulated and present a different alteration tendency at different time course, which might be associated with the duration of diabetes mellitus.
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Affiliation(s)
- Dan Huang
- School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Qing-Song Jiang
- School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Jun-Qing Yang
- School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Ting Cui
- Zunyi Medical and Pharmaceutical College, Zunyi, China
| | | | - Ting-Ting Du
- School of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Xin-Hui Jiang
- School of Pharmacy, Chongqing Medical University, Chongqing, China
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Yazir Y, Polat S, Utkan T, Aricioglu F. Role of the nitric oxide-soluble guanylyl cyclase pathway in cognitive deficits in streptozotocin-induced diabetic rats. PSYCHIAT CLIN PSYCH 2018. [DOI: 10.1080/24750573.2018.1471883] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
Affiliation(s)
- Yusufhan Yazir
- Department of Histology and Embryology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
- Stem Cell and Gene Therapy Research and Application Center, Kocaeli University, Kocaeli, Turkey
| | - Selen Polat
- Stem Cell and Gene Therapy Research and Application Center, Kocaeli University, Kocaeli, Turkey
| | - Tijen Utkan
- Department of Pharmacology and Experimental Medical Research and Application Unit, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | - Feyza Aricioglu
- Faculty of Pharmacy, Department of Pharmacology and Psychopharmacology Research Unit, Marmara University, İstanbul, Turkey
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Chrysophanol Relieves Cognition Deficits and Neuronal Loss Through Inhibition of Inflammation in Diabetic Mice. Neurochem Res 2018; 43:972-983. [DOI: 10.1007/s11064-018-2503-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 02/20/2018] [Accepted: 02/23/2018] [Indexed: 12/11/2022]
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35
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Geijselaers SLC, Sep SJS, Claessens D, Schram MT, van Boxtel MPJ, Henry RMA, Verhey FRJ, Kroon AA, Dagnelie PC, Schalkwijk CG, van der Kallen CJH, Biessels GJ, Stehouwer CDA. The Role of Hyperglycemia, Insulin Resistance, and Blood Pressure in Diabetes-Associated Differences in Cognitive Performance-The Maastricht Study. Diabetes Care 2017; 40:1537-1547. [PMID: 28842522 DOI: 10.2337/dc17-0330] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 07/23/2017] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To study to what extent differences in cognitive performance between individuals with different glucose metabolism status are potentially attributable to hyperglycemia, insulin resistance, and blood pressure-related variables. RESEARCH DESIGN AND METHODS We used cross-sectional data from 2,531 participants from the Maastricht Study (mean age ± SD, 60 ± 8 years; 52% men; n = 666 with type 2 diabetes), all of whom completed a neuropsychological test battery. Hyperglycemia was assessed by a composite index of fasting glucose, postload glucose, glycated hemoglobin (HbA1c), and tissue advanced glycation end products; insulin resistance by the HOMA of insulin resistance index; and blood pressure-related variables included 24-h ambulatory pressures, their weighted SDs, and the use of antihypertensive medication. Linear regression analyses were used to estimate mediating effects. RESULTS After adjustment for age, sex, and education, individuals with type 2 diabetes, compared with those with normal glucose metabolism, performed worse in all cognitive domains (mean differences in composite z scores for memory -0.087, processing speed -0.196, executive function and attention -0.182; P values <0.032), whereas individuals with prediabetes did not. Diabetes-associated differences in processing speed and executive function and attention were largely explained by hyperglycemia (mediating effect 79.6% [bootstrapped 95% CI 36.6; 123.4] and 50.3% [0.6; 101.2], respectively) and, for processing speed, to a lesser extent by blood pressure-related variables (17.7% [5.6; 30.1]), but not by insulin resistance. None of the factors explained the differences in memory function. CONCLUSIONS Our cross-sectional data suggest that early glycemic and blood pressure control, perhaps even in the prediabetic stage, may be promising therapeutic targets for the prevention of diabetes-associated decrements in cognitive performance.
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Affiliation(s)
- Stefan L C Geijselaers
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands.,School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands.,Department of Neurology, Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Simone J S Sep
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands.,School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Danny Claessens
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Miranda T Schram
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands.,School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Martin P J van Boxtel
- Department of Psychiatry and Neuropsychology and School for Mental Health and Neuroscience, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Ronald M A Henry
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands.,School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Frans R J Verhey
- Department of Psychiatry and Neuropsychology and School for Mental Health and Neuroscience, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Abraham A Kroon
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands.,School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Pieter C Dagnelie
- School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands.,School for Public Health and Primary Care (CAPHRI), Maastricht University, Maastricht, the Netherlands.,Department of Epidemiology, Maastricht University, Maastricht, the Netherlands
| | - Casper G Schalkwijk
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands.,School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Carla J H van der Kallen
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands.,School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands
| | - Geert Jan Biessels
- Department of Neurology, Brain Centre Rudolf Magnus, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Coen D A Stehouwer
- Department of Internal Medicine, Maastricht University Medical Centre+, Maastricht, the Netherlands .,School for Cardiovascular Diseases (CARIM), Maastricht University, Maastricht, the Netherlands
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Li HY, Wang XC, Xu YM, Luo NC, Luo S, Hao XY, Cheng SY, Fang JS, Wang Q, Zhang SJ, Chen YB. Berberine Improves Diabetic Encephalopathy Through the SIRT1/ER Stress Pathway in db/db Mice. Rejuvenation Res 2017; 21:200-209. [PMID: 28782427 DOI: 10.1089/rej.2017.1972] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The association between diabetes and dementia has been well demonstrated by epidemiologic studies. Berberine (BBR) has been reported to ameliorate diabetes and diabetic encephalopathy (DE). However, the mechanism is still unknown. In this study, we employ a diabetic model, db/db mice, to explore whether BBR could protect DE through the SIRT1/endoplasmic reticulum (ER) stress pathway. Behavioral results (Morris water maze, Y-maze spontaneous alternation test, and fear conditioning test) showed that oral administration of BBR (50 mg/kg) improved the learning and memory ability. Furthermore, BBR promoted lipid metabolism and decreased fasting glucose in db/db mice. Moreover, western blot analysis revealed that BBR increased the synapse- and nerve-related protein expression (PSD95, SYN, and NGF) and decreased the protein expression of inflammatory factors (TNF-α and NF-κB) in the hippocampus of db/db mice. BBR also increased the protein expression of SIRT1 and downregulated ER stress-associated proteins (PERK, IRE-1α, eIF-2α, PDI, and CHOP) in the hippocampus of db/db mice. Taken together, the present results suggest that the SIRT1/ER stress pathway might be a crucial mechanism in the neuroprotective effect of BBR against DE.
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Affiliation(s)
- Hong-Ying Li
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Xin-Chen Wang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Yu-Min Xu
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Na-Chuan Luo
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Si Luo
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Xu-Yi Hao
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Shu-Yi Cheng
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Jian-Song Fang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Qi Wang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Shi-Jie Zhang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
| | - Yun-Bo Chen
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine , Guangzhou, China
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The use of tucumã oil (Astrocaryum vulgare) in alloxan-induced diabetic mice: effects on behavior, oxidant/antioxidant status, and enzymes involved in brain neurotransmission. Mol Cell Biochem 2017; 436:159-166. [DOI: 10.1007/s11010-017-3087-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 05/30/2017] [Indexed: 01/02/2023]
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Ahmadi M, Rajaei Z, Hadjzadeh MA, Nemati H, Hosseini M. Crocin improves spatial learning and memory deficits in the Morris water maze via attenuating cortical oxidative damage in diabetic rats. Neurosci Lett 2017; 642:1-6. [PMID: 28137647 DOI: 10.1016/j.neulet.2017.01.049] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 01/11/2017] [Accepted: 01/19/2017] [Indexed: 01/29/2023]
Abstract
The purpose of the current study was to examine the influence of crocin on improving spatial memory deficits and cerebral oxidative damage in streptozotocin-induced diabetic rats. Crocin was administered intraperitoneally daily at doses of 15, 30 and 60mg/kg for 6 weeks. Spatial memory performance was measured in rats by the Morris water maze paradigm. Lipid peroxidation and total thiol levels as parameters of oxidative stress were assessed in the cerebral cortex at the end of week 6. Diabetic rats showed spatial learning and memory deficits in the Morris water maze which was accompanied by increased lipid peroxidation levels in the cerebral cortex. By contrast, chronic treatment with crocin (15, 30 and 60mg/kg, ip, 6 weeks) improved cognitive performance and lowered hyperglycaemia and oxidative stress in diabetic rats. In conclusion, the results suggest that beneficial effects of crocin on streptozotocin-induced memory dysfunction may be attributed to its antidiabetic and antioxidant activity, which could find clinical use in treating cognitive dysfunction in diabetics.
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Affiliation(s)
- M Ahmadi
- Neurocognitive Research Center and Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Isfahan, Iran
| | - Z Rajaei
- Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - M A Hadjzadeh
- Neurocognitive Research Center and Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Isfahan, Iran
| | - H Nemati
- Neurocognitive Research Center and Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Isfahan, Iran
| | - M Hosseini
- Neurocognitive Research Center and Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Isfahan, Iran
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Son WR, Nam MH, Hong CO, Kim Y, Lee KW. Plantamajoside from Plantago asiatica modulates human umbilical vein endothelial cell dysfunction by glyceraldehyde-induced AGEs via MAPK/NF-κB. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 17:66. [PMID: 28109289 PMCID: PMC5251346 DOI: 10.1186/s12906-017-1570-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 01/07/2017] [Indexed: 01/25/2023]
Abstract
Background Plantago asiatica has been traditionally used for traditional medicine around East Asia. Plantamajoside (PM), which is isolated from this plant, is known for biological properties including anti-inflammation and antioxidant activity. To demonstrate the biological activity of PM against endothelial dysfunction induced by advanced glycation end-products (AGEs), a cellular inflammatory mechanism system was evaluated in human umbilical vein endothelial cells (HUVECs). Methods We obtained PM through previous research in our laboratory. We formed the AGEs from bovine serum albumin with glyceraldehyde in the dark for seven days. To confirm the modulation of the inflammatory mechanism in endothelial dysfunction, we quantified the various pro-inflammatory cytokines and endothelial dysfunction-related proteins in the HUVECs with Western blotting and with real-time and quantitative real-time polymerase chain reactions. Results Co-treatment with PM and AGEs significantly suppressed inflammatory cytokines and adhesion molecule expression. Moreover, the PM treatment for down-regulated inflammatory signals and blocked monocyte adhesion on the HUVECs. Conclusions Theses results demonstrated that PM, as a potential natural compound, protects AGE-induced endothelial cells against inflammatory cellular dysfunction. Electronic supplementary material The online version of this article (doi:10.1186/s12906-017-1570-1) contains supplementary material, which is available to authorized users.
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Statin Use and Cognitive Impairment in Patients With Type 1 Diabetes: An Observational Study. Clin Neuropharmacol 2017; 39:182-7. [PMID: 27046662 DOI: 10.1097/wnf.0000000000000158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECTIVE We aimed to assess a wide range of cognitive functions in patients with type 1 diabetes (DM1) compared with healthy control subjects and to evaluate the effects of statins on cognitive functions in DM1 patients. MATERIALS AND METHODS The sample studied consisted of 55 DM1 patients (80.0% with hyperlipidemia, 20% with statin treatment) and 36 age-matched control subjects (77.8% with hyperlipidemia) without diabetes or statin use. Their cognitive functions (attention, memory, and executive functions) were evaluated with the trail making test, controlled oral word association test (COWAT), Rey-Osterrieth complex figure test, brain damage test (diagnosticum für cerebralschädigung, DCS), Wisconsin card sorting test (WCST), and digit span and block design tests from the revised Wechsler adult intelligence scale. RESULTS Cognitive performance was impaired in DM1 patients when compared with the control group with regard to semantic verbal fluency (COWAT_animals), visual learning (DCS), conceptual-level responses, executive functions (WCST random errors), and WCST trials to complete the first category. Subgroups of DM1 patients distinguished on the basis of statin therapy did not differ with regard to verbal fluency (COWAT_animals), visual learning (DCS), conceptual-level responses, executive functions (WCST random errors), and WCST trials to complete the first category. Multivariate analysis also does not show the impact of statin therapy on cognitive functioning regardless of the duration of education, microangiopathic evidence, the presence of hyperlipidemia, or antihypertensive therapy. CONCLUSIONS We find impairment of cognitive functions in DM1 patients when compared with control subjects without diabetes. However, we show neither the effect of statins nor the significant influence of metabolic control, microangiopathic complications, or the presence of hyperlipidemia on cognitive functions in DM1 patients.
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Soleymaninejad M, Joursaraei SG, Feizi F, Jafari Anarkooli I. The Effects of Lycopene and Insulin on Histological Changes and the Expression Level of Bcl-2 Family Genes in the Hippocampus of Streptozotocin-Induced Diabetic Rats. J Diabetes Res 2017; 2017:4650939. [PMID: 28656152 PMCID: PMC5471551 DOI: 10.1155/2017/4650939] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 04/09/2017] [Accepted: 04/19/2017] [Indexed: 01/11/2023] Open
Abstract
The aim of this study was to evaluate the effects of antioxidants lycopene and insulin on histological changes and expression of Bcl-2 family genes in the hippocampus of streptozotocin-induced type 1 diabetic rats. Forty-eight Wistar rats were divided into six groups of control (C), control treated with lycopene (CL), diabetic (D), diabetic treated with insulin (DI), diabetic treated with lycopene (DL), and diabetic treated with insulin and lycopene (DIL). Diabetes was induced by an injection of streptozotocin (60 mg/kg, IP), lycopene (4 mg/kg/day) was given to the lycopene treated groups as gavages, and insulin (Sc, 1-2 U/kg/day) was injected to the groups treated with insulin. The number of hippocampus neurons undergoing cell death in group D had significant differences with groups C and DIL (p < 0.001). Furthermore, insulin and lycopene alone or together reduced the expression of Bax, but increased Bcl-2 and Bcl-xL levels in DI, DL, and DIL rats, especially when compared to group D (p < 0.001). The ratios of Bax/Bcl-2 and Bax/Bcl-xL in DI, DL, and DIL rats were also reduced (p < 0.001). Our results indicate that treatment with insulin and/or lycopene contribute to the prevention of cell death by reducing the expression of proapoptotic genes and increasing the expression of antiapoptotic genes in the hippocampus.
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Affiliation(s)
- Masoume Soleymaninejad
- Department of Anatomy, School of Medicine, Babol University of Medical Sciences, Babol, Iran
| | | | - Farideh Feizi
- Department of Anatomy, School of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Iraj Jafari Anarkooli
- Department of Anatomy, School of Medicine, Zanjan University of Medical Sciences (ZUMS), Zanjan, Iran
- *Iraj Jafari Anarkooli:
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Effect of dietary supplementation of Padauk (Pterocarpus soyauxii) leaf on high fat diet/streptozotocin induced diabetes in rats' brain and platelets. Biomed Pharmacother 2016; 84:1194-1201. [PMID: 27788477 DOI: 10.1016/j.biopha.2016.10.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 10/06/2016] [Accepted: 10/17/2016] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND This study investigated the effects of Padauk leaf on brain malondialdehyde (MDA) content, acetylcholinesterase (AChE) activities, ectonucleotidases and adenosine deaminase (ADA) activities in the platelet of high fat diet and streptozotocin (STZ)-induced diabetic rats. METHODS The animals were divided into six groups (n=7): normal control rats; diabetic rats+high fat diet (HFD); diabetic rats+HFD+Metformin; diabetic rats+HFD+acarbose; diabetic rats+HFD+10% Padauk leaf; normal rats+basal diet+10% Padauk leaf. After 30days of experiment comprising of acclimatization, dietary manipulation, pre-treatment with STZ and supplementation with Padauk leaf, the animals were sacrificed and the rats' brain and blood were collected for subsequent analysis. RESULTS The results demonstrated that the elevated MDA content and AChE activity in the diabetic rats were significantly reduced when compared with the control rats. Furthermore, the increased NTPDases, 5'-nucleotidase and ADA activities in the diabetic rats were significantly reduced when compared with the control rats. CONCLUSION This study demonstrated that Padauk leaf exhibited modulatory effects on purinergic and cholinergic enzymes involved in the prevention of platelet abnormality and consequent vascular complications in diabetic state.
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Ma LY, Lv YL, Huo K, Liu J, Shang SH, Fei YL, Li YB, Zhao BY, Wei M, Deng YN, Qu QM. Autophagy-lysosome dysfunction is involved in Aβ deposition in STZ-induced diabetic rats. Behav Brain Res 2016; 320:484-493. [PMID: 27773683 DOI: 10.1016/j.bbr.2016.10.031] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 10/13/2016] [Accepted: 10/19/2016] [Indexed: 11/15/2022]
Abstract
β-Amyloid (Aβ) deposition has a central role in the pathogenesis of Alzheimer disease (AD). Previous studies have indicated that as a risk factor for AD, diabetes mellitus (DM) could induce Aβ deposition in the brain, but the mechanism is not fully elucidated. Autophagy-lysosome is a cellular pathway involved in protein and organelle degradation. In the present study, we used streptozotocin (STZ)-induced diabetic rats to investigate whether autophagy-lysosome is related to Aβ1-42 clearance in DM. We found that DM rats had a longer escape latency and less frequent entry into the target zone than that of the control group (p<0.05) in the Morris water maze test. Meanwhile, hippocampal neuron damage and apoptosis (p<0.05) were found in the DM rats. The Aβ1-42 expression in the hippocampus significantly increased in the DM group compared with the control group (p<0.05). The markers of autophagy, beclin-1 and LC3 II, were increased (p<0.05), whereas LC3 I was decreased (p<0.05), and the ratio of LC3 II / I was increased as the time advanced (p<0.01). LAMP1 and LAMP2, which are the markers of lysosome function, were decreased in the hippocampus of DM rats (p<0.05). The Aβ1-42 deposition was correlated with beclin-1, LC3 II, and LC3 I positively (p<0.05), but with LAMP1 and LAMP2 negatively (p<0.05). These findings indicate that DM activated autophagy, but lysosome function was impaired. Autophagy-lysosome dysfunction may be involved in the Aβ deposition in diabetic cognitive impairment.
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Affiliation(s)
- Lou-Yan Ma
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China; The Second Department of Geriatrics, Xi'an Ninth Hospital, Xi'an, China
| | - Ya-Li Lv
- The Second Department of Geriatrics, Xi'an Ninth Hospital, Xi'an, China
| | - Kang Huo
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jie Liu
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Su-Hang Shang
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yu-Lang Fei
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yan-Bo Li
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Bei-Yu Zhao
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Meng Wei
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yong-Ning Deng
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Qiu-Min Qu
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
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Jawale A, Datusalia AK, Bishnoi M, Sharma SS. Reversal of diabetes-induced behavioral and neurochemical deficits by cinnamaldehyde. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2016; 23:923-930. [PMID: 27387400 DOI: 10.1016/j.phymed.2016.04.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 04/25/2016] [Accepted: 04/26/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Chronic hyperglycemia during diabetes is associated with altered cognitive function. Cinnamaldehyde showed to have many pharmacological activities indicating anti-diabetic, cognitive enhancer, antiinflammatory etc. In the present study, we have investigated the effects of cinnamaldehyde (CA) on diabetes-induced cognitive deficits. METHODS Diabetes was induced in Sprague Dawley rats using high fat diet followed by streptozotocin (35mg/kg, i.p.). High fat diet feeding was continued for 18 week after STZ administration. CA was administered daily during the last 3 weeks (week 16-18) at a doses of 10, 20 and 40mg/kg (p.o.). Animals were subjected to behavioral tests during 18th week. Neurotransmitter levels (glutamate and GABA), acetylcholine esterase (AChE) activity and inflammatory markers (TNF-α and IL-6) were assessed in the hippocampus and cortex. RESULTS Vehicle-treated diabetic rats showed impaired behavior in open field, elevated plus maze and water maze test compared to age-matched control rats. Cinnamaldehyde showed significant reduction in blood glucose levels at dose of 20 and 40mg/kg. Three weeks treatments of cinnamaldehyde showed significant amelioration of behavioral deficits in diabetic rats. Chronic treatment with cinnamaldehyde showed improvement in brain ChE activity, neurotransmitter levels and reduction in IL-6 and TNF-α levels. CONCLUSION The present study demonstrates that treatment with cinnamaldehyde reverse neuroinflammation and changes in neurotransmitter levels, and consequently improves behavioral deficits in diabetic rats.
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Affiliation(s)
- Akshay Jawale
- Molecular Neuropharmacology Lab, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar -160062, Punjab, India.
| | - Ashok Kumar Datusalia
- Molecular Neuropharmacology Lab, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar -160062, Punjab, India.
| | - Mahendra Bishnoi
- National Agri-Food Biotechnology Institute (NABI), S.A.S. Nagar (Mohali)-160071, Punjab, India.
| | - Shyam S Sharma
- Molecular Neuropharmacology Lab, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar -160062, Punjab, India.
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Xu Z, Xu W, Song Y, Zhang B, Li F, Liu Y. Blockade of store-operated calcium entry alleviates high glucose-induced neurotoxicity via inhibiting apoptosis in rat neurons. Chem Biol Interact 2016; 254:63-72. [PMID: 27234048 DOI: 10.1016/j.cbi.2016.05.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 05/08/2016] [Accepted: 05/19/2016] [Indexed: 10/21/2022]
Abstract
Altered store-operated calcium entry (SOCE) has been suggested to be involved in many diabetic complications. However, the association of altered SOCE and diabetic neuronal damage remains unclear. This study aimed to investigate the effects of altered SOCE on primary cultured rat neuron injury induced by high glucose. Our data demonstrated that high glucose increased rat neuron injury and upregulated the expression of store-operated calcium channel (SOC). Inhibition of SOCE by a pharmacological inhibitor and siRNA knockdown of stromal interaction molecule 1 weakened the intracellular calcium overload, restored mitochondrial membrane potential, downregulated cytochrome C release and inhibited cell apoptosis. As well, treatment with the calcium chelator BAPTA-AM prevented cell apoptosis by ameliorating the high glucose-increased intracellular calcium level. These findings suggest that SOCE blockade may alleviate high glucose-induced neuronal damage by inhibiting apoptosis. SOCE might be a promising therapeutic target in diabetic neurotoxicity.
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Affiliation(s)
- Zhenkuan Xu
- Department of Neurosurgery, Qilu Hospital of Shandong University, Brain Science Research Institute of Shandong University, Jinan, Shandong Province 250012, PR China.
| | - Wenzhe Xu
- Department of Neurosurgery, Qilu Hospital of Shandong University, Brain Science Research Institute of Shandong University, Jinan, Shandong Province 250012, PR China.
| | - Yan Song
- Department of Neurosurgery, Qilu Hospital of Shandong University, Brain Science Research Institute of Shandong University, Jinan, Shandong Province 250012, PR China.
| | - Bin Zhang
- Department of Neurosurgery, Qilu Hospital of Shandong University, Brain Science Research Institute of Shandong University, Jinan, Shandong Province 250012, PR China.
| | - Feng Li
- Department of Neurosurgery, Qilu Hospital of Shandong University, Brain Science Research Institute of Shandong University, Jinan, Shandong Province 250012, PR China.
| | - Yuguang Liu
- Department of Neurosurgery, Qilu Hospital of Shandong University, Brain Science Research Institute of Shandong University, Jinan, Shandong Province 250012, PR China.
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Diabetes during pregnancy enhanced neuronal death in the hippocampus of rat offspring. Int J Dev Neurosci 2016; 51:28-35. [DOI: 10.1016/j.ijdevneu.2016.04.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 03/29/2016] [Accepted: 04/20/2016] [Indexed: 12/30/2022] Open
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Sadeghi A, Hami J, Razavi S, Esfandiary E, Hejazi Z. The Effect of Diabetes Mellitus on Apoptosis in Hippocampus: Cellular and Molecular Aspects. Int J Prev Med 2016; 7:57. [PMID: 27076895 PMCID: PMC4809120 DOI: 10.4103/2008-7802.178531] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 10/17/2015] [Indexed: 02/06/2023] Open
Abstract
Background: Diabetes mellitus is associated with cognitive deficits in humans and animals. These deficits are paralleled by neurophysiological and structural changes in brain. In diabetic animals, impairments of spatial learning, memory, and cognition occur in association with distinct changes in hippocampus, a key brain area for many forms of learning and memory and are particularly sensitive to changes in glucose homeostasis. However, the multifactorial pathogenesis of diabetic encephalopathy is not yet completely understood. Apoptosis plays a crucial role in diabetes-induce neuronal loss in hippocampus. Methods: The effects of diabetes on hippocampus and cognitive/behavioral dysfunctions in experimental models of diabetes are reviewed, with a focus on the negative impact on increased neuronal apoptosis and related cellular and molecular mechanisms. Results: Of all articles that were assessed, most of the experimental studies clearly showed that diabetes causes neuronal apoptosis in hippocampus through multiple mechanisms, including oxidative stress, inhibition of caspases, disturbance in expression of apoptosis regulator genes, as well as deficits in mitochondrial function. The balance between pro-apoptotic and anti-apoptotic signaling may determine the neuronal apoptotic outcome in vitro and in vivo models of experimental diabetes. Conclusions: Dissecting out the mechanisms responsible for diabetes-related changes in the hippocampal cell apoptosis helps improve treatment of impaired cognitive and memory functions in diabetic individuals.
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Affiliation(s)
- Akram Sadeghi
- Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Javad Hami
- Department of Anatomical Sciences, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Shahnaz Razavi
- Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ebrahim Esfandiary
- Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Zahra Hejazi
- Department of Genetic Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Zhou J, Du X, Long M, Zhang Z, Zhou S, Zhou J, Qian G. Neuroprotective effect of berberine is mediated by MAPK signaling pathway in experimental diabetic neuropathy in rats. Eur J Pharmacol 2016; 774:87-94. [DOI: 10.1016/j.ejphar.2016.02.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 01/21/2016] [Accepted: 02/01/2016] [Indexed: 12/12/2022]
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Gaspar JM, Baptista FI, Macedo MP, Ambrósio AF. Inside the Diabetic Brain: Role of Different Players Involved in Cognitive Decline. ACS Chem Neurosci 2016; 7:131-42. [PMID: 26667832 DOI: 10.1021/acschemneuro.5b00240] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Diabetes mellitus is the most common metabolic disease, and its prevalence is increasing. A growing body of evidence, both in animal models and epidemiological studies, has demonstrated that metabolic diseases like obesity, insulin resistance, and diabetes are associated with alterations in the central nervous system (CNS), being linked with development of cognitive and memory impairments and presenting a higher risk for dementia and Alzheimer's disease. The rising prevalence of diabetes together with its increasing earlier onset suggests that diabetes-related cognitive dysfunction will increase in the near future, causing substantial socioeconomic impact. Decreased insulin secretion or action, dysregulation of glucose homeostasis, impairment in the hypothalamic-pituitary-adrenal axis, obesity, hyperleptinemia, and inflammation may act independently or synergistically to disrupt neuronal homeostasis and cause diabetes-associated cognitive decline. However, the crosstalk between those factors and the mechanisms underlying the diabetes-related CNS complications is still elusive. During the past few years, different strategies (neuroprotective and antioxidant drugs) have emerged as promising therapies for this complication, which still remains to be preventable or treatable. This Review summarizes fundamental past and ongoing research on diabetes-associated cognitive decline, highlighting potential contributors, mechanistic mediators, and new pharmacological approaches to prevent and/or delay this complication.
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Affiliation(s)
- Joana M. Gaspar
- CEDOC,
Chronic Diseases Research Centre, NOVA Medical School/Faculdade de
Ciências Médicas, Universidade Nova de Lisboa, Edifício
CEDOC - IIRua Câmara Pestana no. 6, 6A e 6B, 1150-082 Lisboa, Portugal
- Institute
for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- Portuguese Diabetes Association (APDP), R. do Salitre 118-120, 1250-203 Lisboa, Portugal
| | - Filipa I. Baptista
- Institute
for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- CNC.IBILI
Consortium, University of Coimbra, 3004-517 Coimbra, Portugal
| | - M. Paula Macedo
- CEDOC,
Chronic Diseases Research Centre, NOVA Medical School/Faculdade de
Ciências Médicas, Universidade Nova de Lisboa, Edifício
CEDOC - IIRua Câmara Pestana no. 6, 6A e 6B, 1150-082 Lisboa, Portugal
- Portuguese Diabetes Association (APDP), R. do Salitre 118-120, 1250-203 Lisboa, Portugal
| | - António F. Ambrósio
- Institute
for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- CNC.IBILI
Consortium, University of Coimbra, 3004-517 Coimbra, Portugal
- AIBILI, 3000-548 Coimbra, Portugal
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A Therapeutic Insight of Niacin and Coenzyme Q10 Against Diabetic Encephalopathy in Rats. Mol Neurobiol 2016; 54:1601-1611. [DOI: 10.1007/s12035-016-9765-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 02/01/2016] [Indexed: 11/25/2022]
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