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Kelly DM, Rothwell PM. Disentangling the Relationship Between Chronic Kidney Disease and Cognitive Disorders. Front Neurol 2022; 13:830064. [PMID: 35280286 PMCID: PMC8914950 DOI: 10.3389/fneur.2022.830064] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 02/03/2022] [Indexed: 12/12/2022] Open
Abstract
Chronic kidney disease (CKD) is a rapidly rising global health burden that affects nearly 40% of older adults. Epidemiologic data suggest that individuals at all stages of chronic kidney disease (CKD) have a higher risk of developing cognitive disorders and dementia, and thus represent a vulnerable population. It is currently unknown to what extent this risk may be attributable to a clustering of traditional risk factors such as hypertension and diabetes mellitus leading to a high prevalence of both symptomatic and subclinical ischaemic cerebrovascular lesions, or whether other potential mechanisms, including direct neuronal injury by uraemic toxins or dialysis-specific factors could also be involved. These knowledge gaps may lead to suboptimal prevention and treatment strategies being implemented in this group. In this review, we explore the mechanisms of susceptibility and risk in the relationship between CKD and cognitive disorders.
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Affiliation(s)
- Dearbhla M. Kelly
- J. Philip Kistler Stroke Research Center, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Peter M. Rothwell
- Wolfson Center for Prevention of Stroke and Dementia, Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
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Optimized integration of metabolomics and lipidomics reveals brain region-specific changes of oxidative stress and neuroinflammation in type 1 diabetic mice with cognitive decline. J Adv Res 2022; 43:233-245. [PMID: 36585111 PMCID: PMC9811331 DOI: 10.1016/j.jare.2022.02.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/08/2022] [Accepted: 02/19/2022] [Indexed: 01/07/2023] Open
Abstract
INTRODUCTION Type 1 diabetes (T1D) causes cognitive decline and has been associated with brain metabolic disorders, but its potential molecular mechanisms remain unclear. OBJECTIVES The purpose of this study was to explore the molecular mechanisms underlying T1D-induced cognitive impairment using metabolomics and lipidomics. METHODS We developed an optimized integration approach of metabolomics and lipidomics for brain tissue based on UPLC-Q-TOF-MS and analyzed a comprehensive characterization of metabolite and lipid profiles in the hippocampus and frontal cortex of T1D male mice with cognitive decline (T1DCD) and age-matched control (CONT) mice. RESULTS The results show that T1DCD mice had brain metabolic disorders in a region-specific manner relative to CONT mice, and the frontal cortex exhibited a higher lipid peroxidation than the hippocampus in T1DCD mice. Based on metabolic changes, we found that microglia was activated under diabetic condition and thereby promoted oxidative stress and neuroinflammation, leading to neuronal injury, and this event was more pronounced in the frontal cortex than the hippocampus. CONCLUSION Our results suggest that brain region-specific shifts in oxidative stress and neuroinflammation may contribute to diabetic cognitive decline, and the frontal cortex could be the more vulnerable brain region than the hippocampus.
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Cai Y, Chen B, Zeng X, Xie M, Wei X, Cai J. The Triglyceride Glucose Index Is a Risk Factor for Enlarged Perivascular Space. Front Neurol 2022; 13:782286. [PMID: 35185759 PMCID: PMC8854364 DOI: 10.3389/fneur.2022.782286] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 01/03/2022] [Indexed: 01/01/2023] Open
Abstract
The triglyceride glucose (TyG) index is considered a simple surrogate marker for insulin resistance and has been associated with cerebrovascular diseases. However, limited information is available regarding its association with the subclinical cerebral small vessel disease (CSVD). Here, we investigated the association of TyG index with the burden and distribution of enlarged perivascular space (EPVS) in the non-diabetic population. The data of 531 non-diabetic patients from 2017 to 2020 were assessed. Participants were grouped according to the burden of EPVS. TyG index was calculated using the log scale of fasting triglycerides (mg/dl) × fasting glucose (mg/dl)/2. The association of TyG index with EPVS burden and distribution was evaluated. In the multivariable logistic regression analysis, the TyG index was associated with moderate to severe EPVS [odds ratio (OR): 2.077; 95% CI = 1.268–3.403]. The TyG index was significantly associated with an increased risk of moderate to severe EPVS in subgroups of age <65 years, male, diastolic blood pressure (DBP) <90 mmHg, low-density lipoprotein cholesterol (LDL-C) ≥2.85 mmol/L, serum homocysteine <10 μmol/L, and estimated glomerular filtration rate (eGFR) <90 ml/min/1.73 m2, as well as those without smoking. Further analysis of EPVS distribution, the TyG index was found to be associated with moderate to severe EPVS in the centrum semiovale (CSO), not in the basal ganglia (BG). Conclusively, the TyG index was independently and positively associated with moderate to severe CSO EPVS. TyG index may serve as an independent risk factor for CSVD in clinical practice.
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Zhang S, Li J, Nong X, Zhan Y, Xu J, Zhao D, Ma C, Wang Y, Li Y, Li Z, Li J. Artesunate Combined With Metformin Ameliorate on Diabetes-Induced Xerostomia by Mitigating Superior Salivatory Nucleus and Salivary Glands Injury in Type 2 Diabetic Rats via the PI3K/AKT Pathway. Front Pharmacol 2022; 12:774674. [PMID: 34987398 PMCID: PMC8722737 DOI: 10.3389/fphar.2021.774674] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 11/09/2021] [Indexed: 12/15/2022] Open
Abstract
Polydipsia and xerostomia are the most common complications that seriously affect oral health in patients with diabetes. However, to date, there is no effective treatment for diabetic xerostomia. Recent studies have reported that artesunate (ART) and metformin (Met) improve salivary gland (SG) hypofunction in murine Sjögren's syndrome. Therefore, aim of this study was to investigate the effect and underlying mechanism of artesunate (ART) alone and in combination with metformin (Met) on hyposalivation in type 2 diabetes mellitus (T2DM) rats. T2DM rats were induced using a high-fat diet and streptozotocin. SPF male Sprague-Dawley rats were divided into the following five groups: normal control group, untreated diabetic group, ART-treated diabetic group (50 mg/kg), Met-treated diabetic group (150 mg/kg), and ART/Met co-treated diabetic group (50 mg/kg ART and 150 mg/kg Met). ART and Met were intragastrically administered daily for 4 weeks. The general conditions, diabetes parameters and serum lipids were evaluated after drug treatment. Furthermore, we observed changes in the central superior salivatory nucleus (SSN) and SG, and changes in the AQP5 expression, parasympathetic innervation (AChE and BDNF expression), and PI3K/AKT pathway- (p-AKT, and p-PI3K), apoptosis- (Bax, Bcl-2, and Caspase3), and autophagy- (LC3 and P62) related markers expression in T2DM rats after treatment. Our results showed that ART or Met alone and ART/Met combination attenuated a range of diabetic symptoms, including weight loss, urine volume increase, water consumption increase, hyperglycemia, insulin resistance, glucose intolerance and dyslipidemia. More importantly, we found that these three treatments, especially ART/Met combination, mitigated hyposalivation in the T2DM rats via improving the central SSN and SGs damage in hyperglycemia. Our data also indicated that ART/Met attenuated SG damage though regulating the PI3K/Akt pathway to inhibit apoptosis and autophagy of SGs in the T2DM rats. Moreover, ART/Met preserved parasympathetic innervation (AChE and BDNF expression) in SGs to alleviate diabetes-induced hyposalivation likely through rescuing central SSN damage. Taken together, these findings might provide a novel rationale and treatment strategy for future treatment of diabetes-induced xerostomia in the clinic.
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Affiliation(s)
- Siqin Zhang
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Jiarui Li
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Xiaolin Nong
- College of Stomatology, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Oral and Maxillofacial Surgery Disease Treatment, Nanning, China
| | - Yuxiang Zhan
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Jiazhi Xu
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Danni Zhao
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Chubin Ma
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Yuchen Wang
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Yixing Li
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Zhan Li
- College of Stomatology, Guangxi Medical University, Nanning, China
| | - Jiaquan Li
- Medical Science Research Center, Guangxi Medical University, Nanning, China.,Life Science Institute, Guangxi Medical University, Nanning, China
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Ding H, Liu C, Zhang S, Li B, Xu Q, Shi B, Li S, Dong S, Ma X, Zhang Y, Zhong M, Zhang G. Sleeve gastrectomy attenuated diabetes-related cognitive decline in diabetic rats. Front Endocrinol (Lausanne) 2022; 13:1015819. [PMID: 36407319 PMCID: PMC9669300 DOI: 10.3389/fendo.2022.1015819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 10/19/2022] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To investigate the effects of sleeve gastrectomy (SG) on diabetes-related cognitive decline (DCD) in rats with diabetic mellitus (DM). METHODS AND METHODS Forty Wistar rats were randomly divided into control (CON) group (n=10), diabetes mellitus (DM) group (n=10), sham operation (SHAM) group (n=10) and SG group (n=10). DM model was established by high-fat diet (HFD) combined with intraperitoneal injection of streptozocin (STZ). Behavioral evaluation was given using Morris water maze test and Y-maze. In addition, PET-CT, TUNEL assay, histological analysis, transmission electron microscopy (TEM), immunohistochemistry (IHC) and Western blot analysis were used to evaluate the alleviating effects and potential mechanisms of SG on DCD in DM rats. RESULTS Compared with the sham group, SG induced significant improvement in the metabolic indices such as blood glucose and body weight. Besides, it could attenuate the insulin resistance compared with SHAM group. In addition, SG could improve the cognitive function of DM rats, which were featured by significant decrease in the escape latency (P<0.05), and significant increase in the time in target quadrant and platform crossings (P<0.05) compared with the SHAM group. SG induced significant elevation in the spontaneous alternation compared with SHAM group (P<0.05). Moreover, SG could improve the arrangement and biosynthesis of hippocampus neuron. Moreover, SG triggered the inhibition of apoptosis of hippocampus neurons, and Western blot analysis showed SG induced significant increase in the ratios of Bcl-2/Bax and Caspase3/cleaved Caspase 3. TEM demonstrated SG could significantly improve the microstructure of hippocampus neurons compared with the SHAM group. Western blot and IHC confirmed the significant decrease in the phosphorylation of tau at Ser404 and Ser396 sites in the SG group. Furthermore, SG activated the PI3K signaling pathway by elevating the phosphorylation of PI3K and Akt and GSK3β compared with the SHAM group. CONCLUSION SG attenuated the DCD in DM rats, which may be related to the activation of PI3K signaling pathway.
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Affiliation(s)
- Huanxin Ding
- Department of General Surgery, Shandong Provincial Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Chuxuan Liu
- Department of General Surgery, Shandong Provincial Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Shuo Zhang
- Medical Research Center, Shandong Provincial Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Bingjun Li
- Department of General Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Qian Xu
- Department of General Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Bowen Shi
- Department of General Surgery, Shandong Provincial Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Songhan Li
- Department of Breast Disease, Peking University People’s Hospital, Beijing, China
| | - Shuohui Dong
- Department of General Surgery, Shandong Provincial Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiaomin Ma
- Department of General Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Yun Zhang
- Department of General Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Mingwei Zhong
- Department of General Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Guangyong Zhang
- Department of General Surgery, Shandong Provincial Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- *Correspondence: Guangyong Zhang,
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Koenig LN, LaMontagne P, Glasser MF, Bateman R, Holtzman D, Yakushev I, Chhatwal J, Day GS, Jack C, Mummery C, Perrin RJ, Gordon BA, Morris JC, Shimony JS, Benzinger TL. Regional age-related atrophy after screening for preclinical alzheimer disease. Neurobiol Aging 2022; 109:43-51. [PMID: 34655980 PMCID: PMC9009406 DOI: 10.1016/j.neurobiolaging.2021.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 07/15/2021] [Accepted: 09/07/2021] [Indexed: 01/03/2023]
Abstract
Brain atrophy occurs in aging even in the absence of dementia, but it is unclear to what extent this is due to undetected preclinical Alzheimer disease. Here we examine a cross-sectional cohort (ages 18-88) free from confounding influence of preclinical Alzheimer disease, as determined by amyloid PET scans and three years of clinical evaluation post-imaging. We determine the regional strength of age-related atrophy using linear modeling of brain volumes and cortical thicknesses with age. Age-related atrophy was seen in nearly all regions, with greatest effects in the temporal lobe and subcortical regions. When modeling age with the estimated derivative of smoothed aging curves, we found that the temporal lobe declined linearly with age, subcortical regions declined faster at later ages, and frontal regions declined slower at later ages than during midlife. This age-derivative pattern was distinct from the linear measure of age-related atrophy and significantly associated with a measure of myelin. Atrophy did not detectably differ from a preclinical Alzheimer disease cohort when age ranges were matched.
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Affiliation(s)
- Lauren N. Koenig
- Department of Radiology, Washington Universit, St Louis, MO, USA
| | | | - Matthew F. Glasser
- Department of Radiology, Washington Universit, St Louis, MO, USA,Department of Neuroscience, Washington University School of Medicine, St Louis, MO USA
| | - Randall Bateman
- Department of Neurology, Washington University, St. Louis, MO, USA,Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, School of Medicine, St. Louis, MO, USA
| | - David Holtzman
- Department of Neurology, Washington University, St. Louis, MO, USA,Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, School of Medicine, St. Louis, MO, USA,Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, USA
| | - Igor Yakushev
- Department of Nuclear Medicine, Technical University of Munich, Munich, Germany
| | - Jasmeer Chhatwal
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Gregory S Day
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - Clifford Jack
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - Catherine Mummery
- Dementia Research Center, UCL Queen Square Institute of Neurology, London, UK
| | - Richard J. Perrin
- Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, School of Medicine, St. Louis, MO, USA,Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, USA,Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA,Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Brian A. Gordon
- Department of Neurology, Washington University, St. Louis, MO, USA,Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, School of Medicine, St. Louis, MO, USA,Department of Psychological & Brain Sciences, Washington University School of Medicine, St. Louis, MO, USA
| | - John C. Morris
- Department of Neurology, Washington University, St. Louis, MO, USA,Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, School of Medicine, St. Louis, MO, USA
| | | | - Tammie L.S. Benzinger
- Department of Radiology, Washington Universit, St Louis, MO, USA,Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, School of Medicine, St. Louis, MO, USA,Corresponding author at: University School of Medicine, 660 South Euclid, Campus 8131, St. Louis, MO 63110, Tel.: (314) 362-1558, fax: (314) 362-6110. (T.L.S. Benzinger)
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van der Heide FCT, van Sloten TT, Willekens N, Stehouwer CDA. Neurovascular coupling unit dysfunction and dementia: Retinal measurements as tools to move towards population-based evidence. Front Endocrinol (Lausanne) 2022; 13:1014287. [PMID: 36506058 PMCID: PMC9727310 DOI: 10.3389/fendo.2022.1014287] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/31/2022] [Indexed: 11/24/2022] Open
Abstract
Dysfunction of the neurovascular coupling unit may be an important contributor to dementia. The neurovascular coupling unit comprises neuronal structures (e.g. astrocytes) and vascular structures (e.g. endothelial cells) that functionally interact both at the level of the arterioles as well as at the capillary level (blood-brain barrier) to regulate optimal metabolic conditions in the brain. However, it remains unclear how and to what extent dysfunction of the neurovascular coupling unit contributes to the early-stage pathobiology of dementia. Currently, limited data are available on the association between neurovascular coupling unit dysfunction, as quantified by cerebral imaging techniques, and cognitive performance. In particular, there is a lack of population-based human data (defined as studies with a sample size ~n>500). This is an important limitation because population-based studies, in comparison with smaller clinical studies, provide data which is better representative of the general population; are less susceptible to selection bias; and have a larger statistical power to detect small associations. To acquire population-based data, however, alternative imaging techniques than cerebral imaging techniques may be required. Disadvantages of cerebral imaging techniques, which limit use in population-based studies, are that these techniques are relatively expensive, time-consuming, and/or invasive. In this review, we propose that retinal imaging techniques can be used for population-based studies: on the one hand the retina and brain have many anatomical and physiological similarities; and on the other hand retinal imaging techniques are non-invasive, highly accurate, relatively inexpensive, and require relatively short measurement time. To provide support for this concept, we provide an overview on the human (population-based) evidence on the associations of retinal indices of neurodegeneration, microvascular dysfunction, and dysfunction of the neurovascular coupling unit with magnetic resonance imaging (MRI) features of structural brain abnormalities and cognitive performance.
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Affiliation(s)
- Frank C. T. van der Heide
- CARIM School for Cardiovascular Diseases, Maastricht University (UM), Maastricht, Netherlands
- Department of Internal Medicine, Maastricht University Medical Center+ (MUMC+), Maastricht, Netherlands
- Department of Psychiatry and Neuropsychology, MUMC+, Maastricht, Netherlands
- School of Mental Health and Neuroscience, MUMC+, Maastricht, Netherlands
- *Correspondence: Frank C. T. van der Heide,
| | - Thomas T. van Sloten
- CARIM School for Cardiovascular Diseases, Maastricht University (UM), Maastricht, Netherlands
- Department of Internal Medicine, Maastricht University Medical Center+ (MUMC+), Maastricht, Netherlands
| | - Nele Willekens
- CARIM School for Cardiovascular Diseases, Maastricht University (UM), Maastricht, Netherlands
- Department of Internal Medicine, Maastricht University Medical Center+ (MUMC+), Maastricht, Netherlands
| | - Coen D. A. Stehouwer
- CARIM School for Cardiovascular Diseases, Maastricht University (UM), Maastricht, Netherlands
- Department of Internal Medicine, Maastricht University Medical Center+ (MUMC+), Maastricht, Netherlands
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ZHAO L, LI J, YU L, WANG H, LI Z, YANG J. Effect of Lycium Barbarum Polysaccharides (LBP) on the cognitive function of rats with type 2 diabetic encephalopathy. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.55821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | - Jun LI
- Shandong First Medical University, China
| | - Leilei YU
- The Central Hospital of Taian, China
| | | | | | - Jie YANG
- The Central Hospital of Taian, China
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Onikanni AS, Lawal B, Olusola AO, Olugbodi JO, Sani S, Ajiboye BO, Ilesanmi OB, Alqarni M, Mostafa-Hedeab G, Obaidullah AJ, Batiha GES, Wu ATH. Sterculia tragacantha Lindl Leaf Extract Ameliorates STZ-Induced Diabetes, Oxidative Stress, Inflammation and Neuronal Impairment. J Inflamm Res 2021; 14:6749-6764. [PMID: 34916823 PMCID: PMC8668250 DOI: 10.2147/jir.s319673] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 11/17/2021] [Indexed: 12/13/2022] Open
Abstract
Background Sterculia tragacantha is a medicinal plant commonly used in the western part of Nigeria, for managing diabetes mellitus. However, there is a dearth of scientific information on the antidiabetic and neuroprotective properties of the plant. Methods The in silico, in vitro and in vivo models were used to evaluate the antioxidants, antidiabetic, anti-inflammatory and neuroprotective potential of aqueous extract of Sterculia tragacantha leaf (AESTL) in streptozotocin (STZ)-induced diabetic rats. Thirty (30) male albino rats (155.34±6.33 g) were intraperitoneal injected with 40 mg/kg of freshly prepared streptozotocin and were divided into 5 groups (A-E) of 6 animals each. Groups A–D were treated with 0, 150 and 300 mg/kg of AESTL, and 200 mg/kg body weight of metformin respectively, while group E serve as the normal control. Results The results of in vitro analysis revealed dose-dependent antioxidant activities; ABTS (IC50 = 63.03±2.57 μg/mL), DPPH (117.49±2.35 μg/mL), FRAP (15.19±0.98 mmol/100g), TAC (43.38±0.96 mg/100g), hypoglycaemic effect; α-amylase (IC50 = 77.21±4.35 μg/mL) and α-glucosidase (IC50 = 443.25±12.35), and anti-cholinesterase; AChE (IC50 = 113.07±3.42 μg/mL) and BChE (IC50 = 87.50±4.32 μg/mL) activities of AESTL. In vivo study revealed dose-dependent hypoglycemic effect and body weight improvement in rats treated with the AESTL. In addition, AESTL improved the antioxidant status and attenuated STZ-induced dysregulations of Na+-K+-ATPase, cholinesterases and neurotransmitters in the brain tissue of experimental rats. The results also demonstrated that AESTL could regulate anti-inflammatory response via inhibition of COX-2/NO signaling axis in the brain of diabetic rats. Molecular docking analysis revealed that epicatechin and procyanidin B2, the bioactive compounds from AESTL, docked well to the binding cavities of acetylcholinesterase, butyrylcholinesterase, α-amylase and α-glucosidase with binding affinities ranges between –8.0 and –11.4 kcal/mol, suggesting that these compounds are the bioactive component that could be responsible for the antidiabetic and neuroprotective activities of AESTL. Conclusion The results of the present study strongly suggested that the AESTL extract could be very useful for halting diabetes progression and its associated neuroinflammation complications.
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Affiliation(s)
- Amos Sunday Onikanni
- Toxicology and Environmental Laboratory, Department of Biochemistry, Faculty of Science, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria.,Biochemistry Unit, Department of Chemical Sciences, Afe Babalola University, Ado-Ekiti, Ekiti State, Nigeria.,Graduate Institute of Biomedical Science, College of Medicine, China Medical University, Taipei, Taiwan
| | - Bashir Lawal
- PhD Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University and Academia Sinica, Taipei, 11031, Taiwan.,Graduate Institute of Cancer Biology & Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan
| | - Augustine O Olusola
- Toxicology and Environmental Laboratory, Department of Biochemistry, Faculty of Science, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria
| | | | - Saidu Sani
- Department of Biochemistry, Faculty of Biological Science, Alex Ekwueme Federal University Ndufu Alike IkwoD, Abakaliki, Ebonyi State, Nigeria
| | - Basiru Olaitan Ajiboye
- Phytomedicine and Molecular Toxicology Research Laboratory, Department of Biochemistry, Faculty of Science, Federal University, Oye-Ekiti, Ekiti State, Nigeria
| | - Omotayo B Ilesanmi
- Department of Biochemistry, Faculty of Science, Federal University Otuoke, Ogbia, Bayelsa State, 23401, Nigeria
| | - Mohammed Alqarni
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, Taif, 21944, Saudi Arabia
| | - Gomaa Mostafa-Hedeab
- Pharmacology Department & Health Research Unit, Medical College, Jouf University, Sakakah, Saudi Arabia.,Pharmacology Department, Faculty of Medicine, Beni-Suef University, Beni Suef, Egypt
| | - Ahmad J Obaidullah
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia.,Drug Exploration and Development Chair (DEDC), Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Gaber El-Saber Batiha
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, AlBeheira, Egypt
| | - Alexander T H Wu
- The PhD Program of Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan.,International Ph.D. Program for Translational Science, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan.,TMU Research Center of Cancer Translational Medicine, Taipei Medical University, Taipei, 11031, Taiwan.,Clinical Research Center, Taipei Medical University Hospital, Taipei Medical University, Taipei, 11031, Taiwan.,Taipei Heart Institute, Taipei Medical University, Taipei, 11031, Taiwan.,Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, 11490, Taiwan
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Treatment with Autophagy Inducer Trehalose Alleviates Memory and Behavioral Impairments and Neuroinflammatory Brain Processes in db/db Mice. Cells 2021; 10:cells10102557. [PMID: 34685538 PMCID: PMC8533743 DOI: 10.3390/cells10102557] [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: 08/18/2021] [Revised: 09/17/2021] [Accepted: 09/24/2021] [Indexed: 12/14/2022] Open
Abstract
Autophagy attenuation has been found in neurodegenerative diseases, aging, diabetes mellitus, and atherosclerosis. In experimental models of neurodegenerative diseases, the correction of autophagy in the brain reverses neuronal and behavioral deficits and hence seems to be a promising therapy for neuropathologies. Our aim was to study the effect of an autophagy inducer, trehalose, on brain autophagy and behavior in a genetic model of diabetes with signs of neuronal damage (db/db mice). A 2% trehalose solution was administered as drinking water during 24 days of the experiment. Expressions of markers of autophagy (LC3-II), neuroinflammation (IBA1), redox state (NOS), and neuronal density (NeuN) in the brain were assessed by immunohistochemical analysis. For behavioral phenotyping, the open field, elevated plus-maze, tail suspension, pre-pulse inhibition, and passive avoidance tests were used. Trehalose caused a slight reduction in increased blood glucose concentration, considerable autophagy activation, and a decrease in the neuroinflammatory response in the brain along with improvements of exploration, locomotor activity, anxiety, depressive-like behavior, and fear learning and memory in db/db mice. Trehalose exerted some beneficial peripheral and systemic effects and partially reversed behavioral alterations in db/db mice. Thus, trehalose as an inducer of mTOR-independent autophagy is effective at alleviating neuronal and behavioral disturbances accompanying experimental diabetes.
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Wang Q, Liang Y, Luo X, Liu Y, Zhang X, Gao L. N6-methyladenosine RNA modification: A promising regulator in central nervous system injury. Exp Neurol 2021; 345:113829. [PMID: 34339678 DOI: 10.1016/j.expneurol.2021.113829] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/08/2021] [Accepted: 07/29/2021] [Indexed: 12/21/2022]
Abstract
In addition to DNA methylation, reversible epigenetic modification occurring in RNA has been discovered recently. The most abundant type of RNA methylation is N6-methyladenosine (m6A) modification, which is dynamically regulated by methylases ("writers"), demethylases ("erasers") and m6A-binding proteins ("readers"). As an essential posttranscriptional regulator, m6A can control mRNA splicing, processing, stability, export and translation. Recent studies have revealed that m6A modification has the strongest tissue specificity for brain tissue and plays crucial roles in central nervous system (CNS) injures by affecting its downstream target genes or non-coding RNAs. This review focuses on the expression and function of m6A regulatory proteins in CNS trauma in vitro and in vivo. We also highlight the latest insights into the molecular mechanisms of pathological damage in the CNS. Understanding m6A dynamics, functions, and machinery will yield an opportunity for designing and developing novel therapeutic agents for CNS injuries.
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Affiliation(s)
- Qiang Wang
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; Department of Immunology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Yundan Liang
- Department of Pathology and Pathophysiology, Chengdu Medical College, Chengdu, Sichuan 610500, PR China
| | - Xiaolei Luo
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Yuqing Liu
- Laboratory of Metabolomics and Gynecological Disease Research, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, PR China
| | - Xiaoli Zhang
- Laboratory of Metabolomics and Gynecological Disease Research, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, PR China
| | - Linbo Gao
- Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China.
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Sovrani V, Bobermin LD, Schmitz I, Leipnitz G, Quincozes-Santos A. Potential Glioprotective Strategies Against Diabetes-Induced Brain Toxicity. Neurotox Res 2021; 39:1651-1664. [PMID: 34258694 DOI: 10.1007/s12640-021-00393-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/30/2021] [Accepted: 07/05/2021] [Indexed: 12/21/2022]
Abstract
Astrocytes are crucial for the maintenance of brain homeostasis by actively participating in the metabolism of glucose, which is the main energy substrate for the central nervous system (CNS), in addition to other supportive functions. More specifically, astrocytes support neurons through the metabolic coupling of synaptic activity and glucose utilization. As such, diabetes mellitus (DM) and consequent glucose metabolism disorders induce astrocyte damage, affecting CNS functionality. Glioprotective molecules can promote protection by improving glial functions and avoiding toxicity in different pathological conditions, including DM. Therefore, this review discusses specific pathomechanisms associated with DM/glucose metabolism disorder-induced gliotoxicity, namely astrocyte metabolism, redox homeostasis/mitochondrial activity, inflammation, and glial signaling pathways. Studies investigating natural products as potential glioprotective strategies against these deleterious effects of DM/glucose metabolism disorders are also reviewed herein. These products include carotenoids, catechins, isoflavones, lipoic acid, polysaccharides, resveratrol, and sulforaphane.
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Affiliation(s)
- Vanessa Sovrani
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - Larissa Daniele Bobermin
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - Izaviany Schmitz
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - Guilhian Leipnitz
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil.,Programa de Pós-Graduação Em Ciências Biológicas: Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil.,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Rua Ramiro Barcelos, 2600 - Anexo, Bairro Santa Cecília, Porto Alegre, RS, 90035-003, Brazil
| | - André Quincozes-Santos
- Programa de Pós-Graduação Em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, RS, Brazil. .,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal Do Rio Grande Do Sul, Rua Ramiro Barcelos, 2600 - Anexo, Bairro Santa Cecília, Porto Alegre, RS, 90035-003, Brazil.
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63
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The Use of Natural Compounds as a Strategy to Counteract Oxidative Stress in Animal Models of Diabetes Mellitus. Int J Mol Sci 2021; 22:ijms22137009. [PMID: 34209800 PMCID: PMC8268811 DOI: 10.3390/ijms22137009] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 06/21/2021] [Accepted: 06/23/2021] [Indexed: 12/14/2022] Open
Abstract
Diabetes mellitus (DM) is a chronic metabolic disease characterised by insulin deficiency, resulting in hyperglycaemia, a characteristic symptom of type 2 diabetes mellitus (DM2). DM substantially affects numerous metabolic pathways, resulting in β-cell dysfunction, insulin resistance, abnormal blood glucose levels, impaired lipid metabolism, inflammatory processes, and excessive oxidative stress. Oxidative stress can affect the body’s normal physiological function and cause numerous cellular and molecular changes, such as mitochondrial dysfunction. Animal models are useful for exploring the cellular and molecular mechanisms of DM and improving novel therapeutics for their safe use in human beings. Due to their health benefits, there is significant interest in a wide range of natural compounds that can act as naturally occurring anti-diabetic compounds. Due to rodent models’ relatively similar physiology to humans and ease of handling and housing, they are widely used as pre-clinical models for studying several metabolic disorders. In this review, we analyse the currently available rodent animal models of DM and their advantages and disadvantages and highlight the potential anti-oxidative effects of natural compounds and their mechanisms of action.
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Yu KKK, Cheing GLY, Cheung C, Kranz GS, Cheung AKK. Gray Matter Abnormalities in Type 1 and Type 2 Diabetes: A Dual Disorder ALE Quantification. Front Neurosci 2021; 15:638861. [PMID: 34163319 PMCID: PMC8215122 DOI: 10.3389/fnins.2021.638861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 05/07/2021] [Indexed: 12/06/2022] Open
Abstract
Aims/hypothesis: Diabetes mellitus (DM) is associated with comorbid brain disorders. Neuroimaging studies in DM revealed neuronal degeneration in several cortical and subcortical brain regions. Previous studies indicate more pronounced brain alterations in type 2 diabetes mellitus (T2DM) than in type 1 diabetes mellitus (T1DM). However, a comparison of both types of DM in a single analysis has not been done so far. The aim of this meta-analysis was to conduct an unbiased objective investigation of neuroanatomical differences in DM by combining voxel-based morphometry (VBM) studies of T1DM and T2DM using dual disorder anatomical likelihood estimation (ALE) quantification. Methods: PubMed, Web of Science and Medline were systematically searched for publications until June 15, 2020. VBM studies comparing gray matter volume (GMV) differences between DM patients and controls at the whole-brain level were included. Study coordinates were entered into the ALE meta-analysis to investigate the extent to which T1DM, T2DM, or both conditions contribute to gray matter volume differences compared to controls. Results: Twenty studies (comprising of 1,175 patients matched with 1,013 controls) were included, with seven studies on GMV alterations in T1DM and 13 studies on GMV alterations in T2DM. ALE analysis revealed seven clusters of significantly lower GMV in T1DM and T2DM patients relative to controls across studies. Both DM subtypes showed GMV reductions in the left caudate, right superior temporal lobe, and left cuneus. Conversely, GMV reductions associated exclusively with T2DM (>99% contribution) were found in the left cingulate, right posterior lobe, right caudate and left occipital lobe. Meta-regression revealed no significant influence of study size, disease duration, and HbA1c values. Conclusions/interpretation: Our findings suggest a more pronounced gray matter atrophy in T2DM compared to T1DM. The increased risk of microvascular or macrovascular complications, as well as the disease-specific pathology of T2DM may contribute to observed GMV reductions. Systematic Review Registration: [PROSPERO], identifier [CRD42020142525].
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Affiliation(s)
- Kevin K K Yu
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong.,University Research Facility in Behavioral and Systems Neuroscience (UBSN), The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Gladys L Y Cheing
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong.,University Research Facility in Behavioral and Systems Neuroscience (UBSN), The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Charlton Cheung
- Department of Psychiatry, The University of Hong Kong, Pokfulam, Hong Kong
| | - Georg S Kranz
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong.,The State Key Laboratory for Brain and Cognitive Sciences, The University of Hong Kong, Pokfulam, Hong Kong.,Department of Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria
| | - Alex Kwok-Kuen Cheung
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong
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65
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Gutova M, Cheng JP, Adhikarla V, Tsaturyan L, Barish ME, Rockne RC, Moschonas EH, Bondi CO, Kline AE. Intranasally Administered L-Myc-Immortalized Human Neural Stem Cells Migrate to Primary and Distal Sites of Damage after Cortical Impact and Enhance Spatial Learning. Stem Cells Int 2021; 2021:5549381. [PMID: 34122556 PMCID: PMC8166475 DOI: 10.1155/2021/5549381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/22/2021] [Indexed: 12/22/2022] Open
Abstract
As the success of stem cell-based therapies is contingent on efficient cell delivery to damaged areas, neural stem cells (NSCs) have promising therapeutic potential because they inherently migrate to sites of central nervous system (CNS) damage. To explore the possibility of NSC-based therapy after traumatic brain injury (TBI), isoflurane-anesthetized adult male rats received a controlled cortical impact (CCI) of moderate severity (2.8 mm deformation at 4 m/s) or sham injury (i.e., no cortical impact). Beginning 1-week post-injury, the rats were immunosuppressed and 1 × 106 human NSCs (LM-NS008.GFP.fLuc) or vehicle (VEH) (2% human serum albumen) were administered intranasally (IN) on post-operative days 7, 9, 11, 13, 15, and 17. To evaluate the spatial distributions of the LM-NSC008 cells, half of the rats were euthanized on day 25, one day after completion of the cognitive task, and the other half were euthanized on day 46. 1 mm thick brain sections were optically cleared (CLARITY), and volumes were imaged by confocal microscopy. In addition, LM-NSC008 cell migration to the TBI site by immunohistochemistry for human-specific Nestin was observed at day 39. Acquisition of spatial learning was assessed in a well-established Morris water maze task on six successive days beginning on post-injury day 18. IN administration of LM-NSC008 cells after TBI (TBI + NSC) significantly facilitated spatial learning relative to TBI + VEH rats (p < 0.05) and had no effect on sham + NSC rats. Overall, these data indicate that IN-administered LM-NSC008 cells migrate to sites of TBI damage and that their presence correlates with cognitive improvement. Future studies will expand on these preliminary findings by evaluating other LM-NSC008 cell dosing paradigms and evaluating mechanisms by which LM-NSC008 cells contribute to cognitive recovery.
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Affiliation(s)
- Margarita Gutova
- Department of Developmental & Stem Cell Biology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Jeffrey P. Cheng
- Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
- Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, USA
| | - Vikram Adhikarla
- Department of Computational and Quantitative Medicine, Division of Mathematical Oncology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Lusine Tsaturyan
- Department of Developmental & Stem Cell Biology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Michael E. Barish
- Department of Developmental & Stem Cell Biology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Russell C. Rockne
- Department of Computational and Quantitative Medicine, Division of Mathematical Oncology, Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Eleni H. Moschonas
- Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
- Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, USA
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA
| | - Corina O. Bondi
- Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
- Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, USA
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA
- Neurobiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Anthony E. Kline
- Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
- Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, USA
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA
- Neurobiology, University of Pittsburgh, Pittsburgh, PA, USA
- Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA, USA
- Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Psychology, University of Pittsburgh, Pittsburgh, PA, USA
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66
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Diaz A, Muñoz-Arenas G, Venegas B, Vázquez-Roque R, Flores G, Guevara J, Gonzalez-Vergara E, Treviño S. Metforminium Decavanadate (MetfDeca) Treatment Ameliorates Hippocampal Neurodegeneration and Recognition Memory in a Metabolic Syndrome Model. Neurochem Res 2021; 46:1151-1165. [PMID: 33559829 DOI: 10.1007/s11064-021-03250-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 01/02/2021] [Accepted: 01/19/2021] [Indexed: 02/07/2023]
Abstract
The consumption of foods rich in carbohydrates, saturated fat, and sodium, accompanied by a sedentary routine, are factors that contribute to the progress of metabolic syndrome (MS). In this way, they cause the accumulation of body fat, hypertension, dyslipidemia, and hyperglycemia. Additionally, MS has been shown to cause oxidative stress, inflammation, and death of neurons in the hippocampus. Consequently, spatial and recognition memory is affected. It has recently been proposed that metformin decavanadate (MetfDeca) exerts insulin mimetic effects that enhance metabolism in MS animals; however, what effects it can cause on the hippocampal neurons of rats with MS are unknown. The objective of the work was to evaluate the effect of MetfDeca on hippocampal neurodegeneration and recognition memory in rats with MS. Administration of MetfDeca for 60 days in MS rats improved object recognition memory (NORt). In addition, MetfDeca reduced markers of oxidative stress and hippocampal neuroinflammation. Accompanied by an increase in the density and length of the dendritic spines of the hippocampus of rats with MS. We conclude that MetfDeca represents an important therapeutic agent to treat MS and induce neuronal and cognitive restoration mechanisms.
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Affiliation(s)
- Alfonso Diaz
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Guadalupe Muñoz-Arenas
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Berenice Venegas
- Faculty of Biological Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Rubén Vázquez-Roque
- Laboratory of Neuropsychiatry, Institute of Physiology, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Gonzalo Flores
- Laboratory of Neuropsychiatry, Institute of Physiology, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico
| | - Jorge Guevara
- Department of Biochemistry, Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico
| | | | - Samuel Treviño
- Faculty of Chemical Sciences, Benemerita Autonomous University of Puebla, Puebla, Pue, Mexico.
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67
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Barbiellini Amidei C, Fayosse A, Dumurgier J, Machado-Fragua MD, Tabak AG, van Sloten T, Kivimäki M, Dugravot A, Sabia S, Singh-Manoux A. Association Between Age at Diabetes Onset and Subsequent Risk of Dementia. JAMA 2021; 325:1640-1649. [PMID: 33904867 PMCID: PMC8080220 DOI: 10.1001/jama.2021.4001] [Citation(s) in RCA: 129] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
IMPORTANCE Trends in type 2 diabetes show an increase in prevalence along with younger age of onset. While vascular complications of early-onset type 2 diabetes are known, the associations with dementia remains unclear. OBJECTIVE To determine whether younger age at diabetes onset is more strongly associated with incidence of dementia. DESIGN, SETTING, AND PARTICIPANTS Population-based study in the UK, the Whitehall II prospective cohort study, established in 1985-1988, with clinical examinations in 1991-1993, 1997-1999, 2002-2004, 2007-2009, 2012-2013, and 2015-2016, and linkage to electronic health records until March 2019. The date of final follow-up was March 31, 2019. EXPOSURES Type 2 diabetes, defined as a fasting blood glucose level greater than or equal to 126 mg/dL at clinical examination, physician-diagnosed type 2 diabetes, use of diabetes medication, or hospital record of diabetes between 1985 and 2019. MAIN OUTCOMES AND MEASURES Incident dementia ascertained through linkage to electronic health records. RESULTS Among 10 095 participants (67.3% men; aged 35-55 years in 1985-1988), a total of 1710 cases of diabetes and 639 cases of dementia were recorded over a median follow-up of 31.7 years. Dementia rates per 1000 person-years were 8.9 in participants without diabetes at age 70 years, and rates were 10.0 per 1000 person-years for participants with diabetes onset up to 5 years earlier, 13.0 for 6 to 10 years earlier, and 18.3 for more than 10 years earlier. In multivariable-adjusted analyses, compared with participants without diabetes at age 70, the hazard ratio (HR) of dementia in participants with diabetes onset more than 10 years earlier was 2.12 (95% CI, 1.50-3.00), 1.49 (95% CI, 0.95-2.32) for diabetes onset 6 to 10 years earlier, and 1.11 (95% CI, 0.70-1.76) for diabetes onset 5 years earlier or less; linear trend test (P < .001) indicated a graded association between age at onset of type 2 diabetes and dementia. At age 70, every 5-year younger age at onset of type 2 diabetes was significantly associated with an HR of dementia of 1.24 (95% CI, 1.06-1.46) in analyses adjusted for sociodemographic factors, health behaviors, and health-related measures. CONCLUSIONS AND RELEVANCE In this longitudinal cohort study with a median follow-up of 31.7 years, younger age at onset of diabetes was significantly associated with higher risk of subsequent dementia.
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Affiliation(s)
- Claudio Barbiellini Amidei
- Epidemiology of Ageing and Neurodegenerative Diseases, Université de Paris, Inserm U1153, Paris, France
- Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Aurore Fayosse
- Epidemiology of Ageing and Neurodegenerative Diseases, Université de Paris, Inserm U1153, Paris, France
| | - Julien Dumurgier
- Epidemiology of Ageing and Neurodegenerative Diseases, Université de Paris, Inserm U1153, Paris, France
- Cognitive Neurology Center, Lariboisière – Fernand Widal Hospital, AP-HP, Université de Paris, Paris, France
| | - Marcos D. Machado-Fragua
- Epidemiology of Ageing and Neurodegenerative Diseases, Université de Paris, Inserm U1153, Paris, France
| | - Adam G. Tabak
- Department of Epidemiology and Public Health, University College London, United Kingdom
- Department of Internal Medicine and Oncology, Semmelweis University Faculty of Medicine, Budapest, Hungary
- Department of Public Health, Semmelweis University Faculty of Medicine, Budapest, Hungary
| | - Thomas van Sloten
- Cardiovascular Research Institute Maastricht (CARIM), Department of Medicine, Maastricht University Medical Centre, Maastricht, the Netherlands
| | - Mika Kivimäki
- Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy
- Department of Epidemiology and Public Health, University College London, United Kingdom
| | - Aline Dugravot
- Epidemiology of Ageing and Neurodegenerative Diseases, Université de Paris, Inserm U1153, Paris, France
| | - Séverine Sabia
- Epidemiology of Ageing and Neurodegenerative Diseases, Université de Paris, Inserm U1153, Paris, France
- Department of Epidemiology and Public Health, University College London, United Kingdom
| | - Archana Singh-Manoux
- Epidemiology of Ageing and Neurodegenerative Diseases, Université de Paris, Inserm U1153, Paris, France
- Department of Epidemiology and Public Health, University College London, United Kingdom
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Weihs A, Frenzel S, Wittfeld K, Obst A, Stubbe B, Habes M, Szentkirályi A, Berger K, Fietze I, Penzel T, Hosten N, Ewert R, Völzke H, Zacharias HU, Grabe HJ. Associations between sleep apnea and advanced brain aging in a large-scale population study. Sleep 2021; 44:5917994. [PMID: 33017007 DOI: 10.1093/sleep/zsaa204] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/13/2020] [Indexed: 12/19/2022] Open
Abstract
Advanced brain aging is commonly regarded as a risk factor for neurodegenerative diseases, for example, Alzheimer's dementia, and it was suggested that sleep disorders such as obstructive sleep apnea (OSA) are significantly contributing factors to these neurodegenerative processes. To determine the association between OSA and advanced brain aging, we investigated the specific effect of two indices quantifying OSA, namely the apnea-hypopnea index (AHI) and the oxygen desaturation index (ODI), on brain age, a score quantifying age-related brain patterns in 169 brain regions, using magnetic resonance imaging and overnight polysomnography data from 690 participants (48.8% women, mean age 52.5 ± 13.4 years) of the Study of Health in Pomerania. We additionally investigated the mediating effect of subclinical inflammation parameters on these associations via a causal mediation analysis. AHI and ODI were both positively associated with brain age (AHI std. effect [95% CI]: 0.07 [0.03; 0.12], p-value: 0.002; ODI std. effect [95% CI]: 0.09 [0.04; 0.13], p-value: < 0.0003). The effects remained stable in the presence of various confounders such as diabetes and were partially mediated by the white blood cell count, indicating a subclinical inflammation process. Our results reveal an association between OSA and brain age, indicating subtle but widespread age-related changes in regional brain structures, in one of the largest general population studies to date, warranting further examination of OSA in the prevention of neurodegenerative diseases.
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Affiliation(s)
- Antoine Weihs
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - Stefan Frenzel
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - Katharina Wittfeld
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany.,German Centre for Neurodegenerative Diseases (DZNE), Site Rostock/Greifswald, Greifswald, Germany
| | - Anne Obst
- Department of Internal Medicine B-Cardiology, Pneumology, Infectious Diseases, Intensive Care Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Beate Stubbe
- Department of Internal Medicine B-Cardiology, Pneumology, Infectious Diseases, Intensive Care Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Mohamad Habes
- Department of Radiology, University of Pennsylvania, Philadelphia, PA
| | - András Szentkirályi
- Institute of Epidemiology and Social Medicine, University of Muenster, Muenster, Germany
| | - Klaus Berger
- Institute of Epidemiology and Social Medicine, University of Muenster, Muenster, Germany
| | - Ingo Fietze
- Interdisciplinary Centre of Sleep Medicine, CC 12, University Hospital Charité Berlin, Berlin, Germany
| | - Thomas Penzel
- Interdisciplinary Centre of Sleep Medicine, CC 12, University Hospital Charité Berlin, Berlin, Germany
| | - Norbert Hosten
- Institute for Diagnostic Radiology and Neuroradiology, University Medicine Greifswald, Greifswald, Germany
| | - Ralf Ewert
- Department of Internal Medicine B-Cardiology, Pneumology, Infectious Diseases, Intensive Care Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Henry Völzke
- Institute for Community Medicine, Department SHIP/Clinical Epidemiological Research, University Medicine Greifswald, Greifswald, Germany.,German Centre for Cardiovascular Research (DZHK), Partner Site Greifswald, Greifswald, Germany
| | - Helena U Zacharias
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - Hans J Grabe
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany.,German Centre for Neurodegenerative Diseases (DZNE), Site Rostock/Greifswald, Greifswald, Germany
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69
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Moin ASM, Al-Qaissi A, Sathyapalan T, Atkin SL, Butler AE. Hypoglycaemia in type 2 diabetes exacerbates amyloid-related proteins associated with dementia. Diabetes Obes Metab 2021; 23:338-349. [PMID: 33026133 DOI: 10.1111/dom.14220] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/17/2020] [Accepted: 10/04/2020] [Indexed: 12/12/2022]
Abstract
AIMS Hypoglycaemia in diabetes (T2D) may increase the risk of Alzheimer's disease (AD). We hypothesized that hypoglycaemia-induced amyloid-related protein changes would be exacerbated in T2D. MATERIALS AND METHODS A prospective, parallel study in T2D (n = 23) and controls (n = 23). Subjects underwent insulin-induced hypoglycaemia with blood sampling at baseline, hypoglycaemia and post-hypoglycaemia; proteomic analysis of amyloid-related proteins was undertaken. RESULTS At baseline, amyloid-precursor protein (APP) (P < .01) was elevated and alpha-synuclein (SNCA) (P < .01) reduced in T2D. At hypoglycaemia, amyloid P-component (P < .01) was elevated and SNCA (P < .05) reduced in T2D; APP (P < .01) and noggin (P < .05) were elevated and SNCA (P < .01) reduced in controls. In the post-hypoglycaemia follow-up period, APP and microtubule-associated protein tau normalized in controls but showed a below-baseline decrease in T2D; noggin normalized in both; SNCA normalized in T2D, with a below-baseline decrease in controls. CONCLUSION The AD-associated protein pattern found in T2D, with basal elevated APP and reduced SNCA, was exaggerated by hypoglycaemia with increased APP and decreased SNCA. Additional AD-associated protein levels that changed in response to hypoglycaemia, particularly in T2D, included amyloid P-component, microtubule-associated protein tau, apolipoproteins A1 and E3, pappalysin and noggin. These results are in accordance with the reported detrimental effects of hypoglycaemia.
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Affiliation(s)
- Abu Saleh Md Moin
- Diabetes Research Center (DRC), Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Qatar Foundation (QF), Doha, Qatar
| | - Ahmed Al-Qaissi
- Academic Endocrinology, Diabetes and Metabolism, Hull York Medical School, Hull, UK
- Leeds Medical School, Leeds, UK
| | | | | | - Alexandra E Butler
- Diabetes Research Center (DRC), Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Qatar Foundation (QF), Doha, Qatar
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Sesamin alleviates diabetes-associated behavioral deficits in rats: The role of inflammatory and neurotrophic factors. Int Immunopharmacol 2021; 92:107356. [PMID: 33440305 DOI: 10.1016/j.intimp.2020.107356] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/23/2020] [Accepted: 12/27/2020] [Indexed: 12/13/2022]
Abstract
Neuroinflammation and loss of neurotrophic support have key roles in the pathophysiology of diabetes-associated behavioral deficits (DABD). Sesamin (Ses), a major lignan of sesame seed and its oil, shows anti-hyperglycemic, anti-oxidative, and neuroprotective effects. The present study was designed to assess the potential protective effects of Ses against DABD and investigate the roles of inflammatory markers and neurotrophic factors in streptozotocin (STZ)-induced diabetic rats. After confirmation of diabetes, Ses (30 mg/kg/day; P.O.) or insulin (6 IU/rat/day; S.C.) was administered to rats for eight consecutive weeks. During the eighth-week period of the study, behavioral functions of the animals were evaluated by employing standard behavioral paradigms. Moreover, inflammation status, neurotrophic factors, and histological changes were assessed in the cerebral cortex and hippocampal regions of the rats. The results of behavioral tests showed that STZ-induced diabetes increased anxiety-/depression-like behaviors, decreased locomotor/exploratory activities, and impaired passive avoidance learning and memory. These DABD were accompanied by neuroinflammation, lack of neurotrophic support, and neuronal loss in both cerebral cortex and hippocampus of the rats. Intriguingly, chronic treatment with Ses improved all the above-mentioned diabetes-related behavioral, biochemical, and histological deficits, and in some cases, it was even more effective than insulin therapy. In conclusion, the results suggest that Ses was capable of improving DABD, which might be ascribed, at least partly, to the reduction of blood glucose level, inhibition of neuroinflammation, and potentiation of neurotrophic factors.
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71
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Kang X, Li C, Xie Y, He LL, Xiao F, Zhan KB, Tang YY, Li X, Tang XQ. Hippocampal ornithine decarboxylase/spermidine pathway mediates H 2S-alleviated cognitive impairment in diabetic rats: Involving enhancment of hippocampal autophagic flux. J Adv Res 2020; 27:31-40. [PMID: 33318864 PMCID: PMC7728590 DOI: 10.1016/j.jare.2020.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 05/14/2020] [Accepted: 06/09/2020] [Indexed: 12/13/2022] Open
Abstract
Introduction We have previously demonstrated the antagonistic role of hydrogen sulfide (H2S) in the cognitive dysfunction of streptozotocin (STZ)-induced diabetic rats. It has been confirmed that the impaired hippocampal autophagic flux has a key role in the pathogenesis of cognitive impairment and that ornithine decarboxylase (ODC)/spermidine (Spd) pathway plays an important role in the formation of memory by promoting autophagic flux. Objectives To investigate the roles of hippocampal ODC/Spd pathway and autophagic flux in H2S-attenuated cognitive impairment in STZ-induced diabetic rats. Methods Cognitive function is judged by the novel objective recognition task (NOR), the Y-maze, and the Morris water maze (MWM) tests. The ODC/Spd pathway in hippocampus was evaluated using the expression of ODC detected by western blot and the level of Spd assayed by GC-MS. Autophagic flux was assessed using the expressions of Beclin-1, LC3II/I, and P62 detected by western blot, and the number of autophagosomes observed by transmission electron microscope. Results Sodium hydrosulfide (NaHS, a donor of H2S) markedly improved the autophagic flux in the hippocampus of STZ-exposed rats, as evidenced by a decrease in the number of autophagosomes as wells as downregulations in the expressions of LC3-II, Beclin-1, and P62 in the hippocampus of cotreatment with NaHS and STZ rats. NaHS also up-regulated the expression of ODC and the level of Spd in the hippocampus of STZ-induced diabetic rats. Furthermore, inhibited hippocampal ODC/Spd pathway by difluoromethylornithine (DFMO) markedly reversed the protections of NaHS against the hippocampal autophagic flux impairment as well as the cognitive dysfunction in STZ-exposed rats. Conclusion These findings indicated that improving hippocampal autophagic flux plays a key role in H2S-attenuated cognitive impairment in STZ-induced diabetic rats, as results of up-regulating hippocampal ODC/Spd pathway.
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Affiliation(s)
- Xuan Kang
- Institute of Neurology, The First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China.,Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China
| | - Cheng Li
- Department of Emergency Affiliated Nanhua Hospital, University of South China, Hengyang 421001, Hunan, PR China.,Department of Neurology, The Second Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Yan Xie
- Department of Neurology, The Second Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Ling-Li He
- Department of Neurology, The Second Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Fan Xiao
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China
| | - Ke-Bin Zhan
- Department of Neurology, The Second Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Yi-Yun Tang
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China
| | - Xiang Li
- Department of Anesthesiology, The First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China
| | - Xiao-Qing Tang
- Institute of Neurology, The First Affiliated Hospital, University of South China, Hengyang 421001, Hunan, PR China.,Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang 421001, Hunan, PR China
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Mejía-Rodríguez O, Zavala-Calderón E, Magaña-García N, González-Campos R, López-Loeza E, Rangel-Argueta AR, López-Vázquez MÁ, Olvera-Cortés ME. Diabetic patients are deficient in intentional visuospatial learning and show different learning-related patterns of theta and gamma EEG activity. J Clin Exp Neuropsychol 2020; 43:15-32. [PMID: 33641640 DOI: 10.1080/13803395.2020.1853065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Introduction: We hypothesized that diabetic patients without mild cognitive impairment would present deficiencies in visuospatial incidental/intentional memory processing and alterations in the underlying EEG alpha, theta and gamma patterns.Methods: Non-diabetic, diabetic-controlled, and diabetic-uncontrolled patients underwent a visuospatial incidental-intentional memory test under simultaneous recording of temporal, parietal, and frontal EEG. The test required patients to solve a maze, with eight objects irrelevant to the task, embedded in it, after an interference instruction, participants were asked to recall the positions of the objects (incidental test). Finally, the participants were explicitly told to study the object positions, and then were asked to recall the objects again (intentional test). Power from baseline, incidental learning, incidental memory, and intentional learning conditions was obtained in alpha, theta, and low-gamma bands. Comparisons were made across groups and conditions for each band, with age, sex, and years from the diagnosis as covariates (ANCOVA with blocking).Results: Diabetic patients showed spared incidental but deficient intentional visuospatial learning. Uncontrolled patients showed a more profound intentional learning deficit as they scored similar numbers of correct positions under incidental and intentional conditions; whereas, non-diabetic and diabetic-controlled patients increased their number after the intentional study. Non-diabetic participants showed increased power during intentional learning compared with the baseline condition in frontal theta, frontoparietal gamma (Fp2 and P4) and frontal alpha (F4) bands; whereas in diabetic patients the power increased in the theta band, in T5 (uncontrolled) and T5 and F7 (controlled).Conclusions: Diabetic patients without mild cognitive impairment show deficient intentional visuospatial learning which was worse in uncontrolled patients. Theta and gamma power increased in healthy participants during intentional learning principally in frontal areas. These EEG power changes were absent in diabetic patients. The reduced accuracy of diabetic patients in intentional visuospatial learning was associated with different EEG learning-related patterns.
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Affiliation(s)
- Oliva Mejía-Rodríguez
- Instituto Mexicano del Seguro Social, Hospital General de Zona N° 83 Morelia, Michoacán, México.,Instituto Mexicano del Seguro Social, Centro de Investigación Biomédica de Michoacán, Michoacán, México
| | | | - Nancy Magaña-García
- Facultad de Ciencias Físico-Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Michoacán, México
| | | | - Elisa López-Loeza
- Laboratorio de Biofisica, Instituto de Investigaciones en Física y Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Michoacán, México
| | - Ana Rosa Rangel-Argueta
- Laboratorio de Biofisica, Instituto de Investigaciones en Física y Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Michoacán, México
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Muresanu DF, Sharma A, Sahib S, Tian ZR, Feng L, Castellani RJ, Nozari A, Lafuente JV, Buzoianu AD, Sjöquist PO, Patnaik R, Wiklund L, Sharma HS. Diabetes exacerbates brain pathology following a focal blast brain injury: New role of a multimodal drug cerebrolysin and nanomedicine. PROGRESS IN BRAIN RESEARCH 2020; 258:285-367. [PMID: 33223037 DOI: 10.1016/bs.pbr.2020.09.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Blast brain injury (bBI) is a combination of several forces of pressure, rotation, penetration of sharp objects and chemical exposure causing laceration, perforation and tissue losses in the brain. The bBI is quite prevalent in military personnel during combat operations. However, no suitable therapeutic strategies are available so far to minimize bBI pathology. Combat stress induces profound cardiovascular and endocrine dysfunction leading to psychosomatic disorders including diabetes mellitus (DM). This is still unclear whether brain pathology in bBI could exacerbate in DM. In present review influence of DM on pathophysiology of bBI is discussed based on our own investigations. In addition, treatment with cerebrolysin (a multimodal drug comprising neurotrophic factors and active peptide fragments) or H-290/51 (a chain-breaking antioxidant) using nanowired delivery of for superior neuroprotection on brain pathology in bBI in DM is explored. Our observations are the first to show that pathophysiology of bBI is exacerbated in DM and TiO2-nanowired delivery of cerebrolysin induces profound neuroprotection in bBI in DM, not reported earlier. The clinical significance of our findings with regard to military medicine is discussed.
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Affiliation(s)
- Dafin F Muresanu
- Department of Clinical Neurosciences, University of Medicine & Pharmacy, Cluj-Napoca, Romania; "RoNeuro" Institute for Neurological Research and Diagnostic, Cluj-Napoca, Romania
| | - Aruna Sharma
- International Experimental Central Nervous System Injury & Repair (IECNSIR), Department of Surgical Sciences, Anesthesiology & Intensive Care Medicine, Uppsala University Hospital, Uppsala University, Uppsala, Sweden.
| | - Seaab Sahib
- Department of Chemistry & Biochemistry, University of Arkansas, Fayetteville, AR, United States
| | - Z Ryan Tian
- Department of Chemistry & Biochemistry, University of Arkansas, Fayetteville, AR, United States
| | - Lianyuan Feng
- Department of Neurology, Bethune International Peace Hospital, Shijiazhuang, Hebei Province, China
| | - Rudy J Castellani
- Department of Pathology, University of Maryland, Baltimore, MD, United States
| | - Ala Nozari
- Anesthesiology & Intensive Care, Massachusetts General Hospital, Boston, MA, United States
| | - José Vicente Lafuente
- LaNCE, Department of Neuroscience, University of the Basque Country (UPV/EHU), Leioa, Bizkaia, Spain
| | - Anca D Buzoianu
- Department of Clinical Pharmacology and Toxicology, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Per-Ove Sjöquist
- Division of Cardiology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Ranjana Patnaik
- Department of Biomaterials, School of Biomedical Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi, India
| | - Lars Wiklund
- International Experimental Central Nervous System Injury & Repair (IECNSIR), Department of Surgical Sciences, Anesthesiology & Intensive Care Medicine, Uppsala University Hospital, Uppsala University, Uppsala, Sweden
| | - Hari Shanker Sharma
- International Experimental Central Nervous System Injury & Repair (IECNSIR), Department of Surgical Sciences, Anesthesiology & Intensive Care Medicine, Uppsala University Hospital, Uppsala University, Uppsala, Sweden.
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Song Y, Wang Q, Li L, Chen S, Zhao Y, Gao L. Comprehensive epigenetic analysis of m6A modification in the hippocampal injury of diabetic rats. Epigenomics 2020; 12:1811-1824. [PMID: 33112671 DOI: 10.2217/epi-2020-0125] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aim: To study RNA N6-methyladenosine (m6A) modification in the diabetic hippocampus. Methods: Behavioral tests and staining were performed to evaluate the damage to the diabetic hippocampus in model rats. Western blotting was performed to investigate the expression of methylation-related enzymes, and flow cytometry was used to demonstrate HT22 cell apoptosis. M6A and RNA sequencing analyses were conducted to profile m6A-tagged transcripts in the diabetic hippocampus. Results: The rat models of diabetes mellitus suffered from cognitive disorders and hippocampal neuron damage. High glucose levels altered the expression of methylation-related enzymes. A total of 4890 differentially methylated m6A peaks and 63 differentially expressed genes and differentially methylated m6A sites were identified. Conclusion: The findings suggest that m6A modification is altered in the diabetic hippocampus and provide new insight into diabetic hippocampal injury.
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Affiliation(s)
- Yu Song
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Qunhui Wang
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130000, China
| | - Lei Li
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Songyu Chen
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Yuhao Zhao
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130000, China
| | - Liang Gao
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
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Shah P, Chavda V, Patel S, Bhadada S, Ashraf GM. Promising Anti-stroke Signature of Voglibose: Investigation through In- Silico Molecular Docking and Virtual Screening in In-Vivo Animal Studies. Curr Gene Ther 2020; 20:223-235. [DOI: 10.2174/1566523220999200726225457] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 05/28/2020] [Accepted: 07/14/2020] [Indexed: 01/01/2023]
Abstract
Background:
Postprandial hyperglycemia considered to be a major risk factor for
cerebrovascular complications.
Objective:
The current study was designed to elucidate the beneficial role of voglibose via in-silico in
vitro to in-vivo studies in improving the postprandial glycaemic state by protection against strokeprone
type 2 diabetes.
Material and Methods:
In-Silico molecular docking and virtual screening were carried out with the
help of iGEMDOCK+ Pymol+docking software and Protein Drug Bank database (PDB). Based on the
results of docking studies, in-vivo investigation was carried out for possible neuroprotective action.
T2DM was induced by a single injection of streptozotocin (90mg/kg, i.v.) to neonates. Six weeks after
induction, voglibose was administered at the dose of 10mg/kg p.o. for two weeks. After eight weeks,
diabetic rats were subjected to middle cerebral artery occlusion, and after 72 hours of surgery,
neurological deficits were determined. The blood was collected for the determination of serum
glucose, CK-MB, LDH and lipid levels. Brains were excised for determination of brain infarct
volume, brain hemisphere weight difference, Na+-K+ ATPase activity, ROS parameters, NO levels,
and aldose reductase activity.
Results:
In-silico docking studies showed good docking binding score for stroke associated proteins,
which possibly hypotheses neuroprotective action of voglibose in stroke. In the present in-vivo study,
pre-treatment with voglibose showed a significant decrease (p<0.05) in serum glucose and lipid levels.
Voglibose has shown significant (p<0.05) reduction in neurological score, brain infarct volume, the
difference in brain hemisphere weight. On biochemical evaluation, treatment with voglibose produced
significant (p<0.05) decrease in CK-MB, LDH, and NO levels in blood and reduction in Na+-K+
ATPase, oxidative stress, and aldose reductase activity in brain homogenate.
Conclusion:
In-silico molecular docking and virtual screening studies and in-vivo studies in MCAo
induced stroke, animal model outcomes support the strong anti-stroke signature for possible
neuroprotective therapeutics.
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Affiliation(s)
- Pooja Shah
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Ahmadabad, Gujarat, 382 481, India
| | - Vishal Chavda
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Ahmadabad, Gujarat, 382 481, India
| | - Snehal Patel
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Ahmadabad, Gujarat, 382 481, India
| | - Shraddha Bhadada
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Ahmadabad, Gujarat, 382 481, India
| | - Ghulam Md. Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
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Abstract
The central nervous system is simply divided into two distinct anatomical regions based on the color of tissues, i.e. the gray and white matter. The gray matter is composed of neuronal cell bodies, glial cells, dendrites, immune cells, and the vascular system, while the white matter is composed of concentrated myelinated axonal fibers extending from neuronal soma and glial cells, such as oligodendrocyte precursor cells (OPCs), oligodendrocytes, astrocytes, and microglia. As neuronal cell bodies are located in the gray matter, great attention has been focused mainly on the gray matter regarding the understanding of the functions of the brain throughout the neurophysiological areas, leading to a scenario in which the function of the white matter is relatively underestimated or has not received much attention. However, increasing evidence shows that the white matter plays highly significant and pivotal functions in the brain based on the fact that its abnormalities are associated with numerous neurological diseases. In this review, we will broadly discuss the pathways and functions of myelination, which is one of the main processes that modulate the functions of the white matter, as well as the manner in which its abnormalities are related to neurological disorders.
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77
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Mecklenburg J, Zou Y, Wangzhou A, Garcia D, Lai Z, Tumanov AV, Dussor G, Price TJ, Akopian AN. Transcriptomic sex differences in sensory neuronal populations of mice. Sci Rep 2020; 10:15278. [PMID: 32943709 PMCID: PMC7499251 DOI: 10.1038/s41598-020-72285-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 08/24/2020] [Indexed: 12/24/2022] Open
Abstract
Many chronic pain conditions show sex differences in their epidemiology. This could be attributed to sex-dependent differential expression of genes (DEGs) involved in nociceptive pathways, including sensory neurons. This study aimed to identify sex-dependent DEGs in estrous female versus male sensory neurons, which were prepared by using different approaches and ganglion types. RNA-seq on non-purified sensory neuronal preparations, such as whole dorsal root ganglion (DRG) and hindpaw tissues, revealed only a few sex-dependent DEGs. Sensory neuron purification increased numbers of sex-dependent DEGs. These DEG sets were substantially influenced by preparation approaches and ganglion types [DRG vs trigeminal ganglia (TG)]. Percoll-gradient enriched DRG and TG neuronal fractions produced distinct sex-dependent DEG groups. We next isolated a subset of sensory neurons by sorting DRG neurons back-labeled from paw and thigh muscle. These neurons have a unique sex-dependent DEG set, yet there is similarity in biological processes linked to these different groups of sex-dependent DEGs. Female-predominant DEGs in sensory neurons relate to inflammatory, synaptic transmission and extracellular matrix reorganization processes that could exacerbate neuro-inflammation severity, especially in TG. Male-selective DEGs were linked to oxidative phosphorylation and protein/molecule metabolism and production. Our findings catalog preparation-dependent sex differences in neuronal gene expressions in sensory ganglia.
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Affiliation(s)
- Jennifer Mecklenburg
- Department of Endodontics, University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, TX, 78229, USA
| | - Yi Zou
- Greehey Children's Cancer Research Institute, UTHSCSA, San Antonio, TX, USA
| | - Andi Wangzhou
- Department of Neuroscience and Center for Advanced Pain Studies, University of Texas at Dallas School of Behavioral and Brain Sciences, Richardson, TX, 75080, USA
| | - Dawn Garcia
- Greehey Children's Cancer Research Institute, UTHSCSA, San Antonio, TX, USA
| | - Zhao Lai
- Greehey Children's Cancer Research Institute, UTHSCSA, San Antonio, TX, USA
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, TX, 78229, USA
| | - Alexei V Tumanov
- Departments of Microbiology, Immunology & Molecular Genetics, University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, TX, 78229, USA
| | - Gregory Dussor
- Department of Neuroscience and Center for Advanced Pain Studies, University of Texas at Dallas School of Behavioral and Brain Sciences, Richardson, TX, 75080, USA
| | - Theodore J Price
- Department of Neuroscience and Center for Advanced Pain Studies, University of Texas at Dallas School of Behavioral and Brain Sciences, Richardson, TX, 75080, USA
| | - Armen N Akopian
- Department of Endodontics, University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, TX, 78229, USA.
- Department of Pharmacology, The School of Dentistry, University of Texas Health Science Center at San Antonio (UTHSCSA), 7703 Floyd Curl Drive, San Antonio, TX, 78229-3900, USA.
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Ma S, Li S, Lv R, Hou X, Nie S, Yin Q. Prevalence of mild cognitive impairment in type 2 diabetes mellitus is associated with serum galectin-3 level. J Diabetes Investig 2020; 11:1295-1302. [PMID: 32196999 PMCID: PMC7477520 DOI: 10.1111/jdi.13256] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 03/02/2020] [Accepted: 03/17/2020] [Indexed: 12/11/2022] Open
Abstract
AIMS/INTRODUCTION Galectin-3 (Gal3) contributes to insulin resistance, inflammation and obesity, the three risk factors for mild cognitive impairment (MCI) in type 2 diabetes mellitus patients. MATERIALS AND METHODS A total of 134 hospitalized type 2 diabetes mellitus patients were assessed by the Montreal Cognitive Assessment method, and divided into 65 MCI and 69 controls. Levels of variables, Gal3 and Aβ42, were investigated in relation with cognitive function in both type 2 diabetes mellitus patients with MCI and high-fat diet/streptozotocin induced type 2 diabetes mellitus rats. RESULTS Significantly higher levels of serum Gal3 and lower levels of plasma Aβ42 (all P < 0.05) were found in the MCI type 2 diabetes mellitus group as compared with the non-MCI type 2 diabetes mellitus control. Partial correlation analysis showed that Gal3 is negatively correlated with both MMSE score (r = -0.51, P < 0.01) and Montreal Cognitive Assessment score (r = -0.47, P < 0.001) after adjustment for glycated hemoglobin, homoeostasis model assessment of insulin resistance and Aβ42 in all type 2 diabetes mellitus patients, with a stronger effect seen in the MCI type 2 diabetes mellitus group after further analysis with MCI strata. A simple logistic regression model showed that Gal3 and Aβ42 are significantly associated with MCI type 2 diabetes mellitus patients after adjustment with the covariates sex, age, body mass index, glycated hemoglobin, homoeostasis model assessment of insulin resistance and antidiabetic drugs. Serum and brain Gal3 levels were significantly increased in high-fat diet/streptozotocin diabetic rats, which correlate to the impairment of learning and memory ability. Gal3 inhibitor modified citrus pectin decreased serum and brain Gal3 levels in diabetic rats, accompanied by the amelioration of learning and memory impairment. CONCLUSIONS Gal3 might be associated with cognitive impairment in type 2 diabetes mellitus, and serum Gal3 level might be a new risk factor of MCI in type 2 diabetes mellitus patients.
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Affiliation(s)
- Shizhan Ma
- Department of EndocrinologyShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Shangbin Li
- Department of GeriatricsShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
- Department of GeriatricShandong Provincial Hospital Affiliated to Shandong UniversityJinanChina
| | - Renjun Lv
- Department of Geriatric NeurologyShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Xunyao Hou
- Department of GeriatricShandong Provincial Hospital Affiliated to Shandong UniversityJinanChina
| | - Shanjing Nie
- Department of Geriatric NeurologyShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
| | - Qingqing Yin
- Department of Geriatric NeurologyShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanChina
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Kellar D, Craft S. Brain insulin resistance in Alzheimer's disease and related disorders: mechanisms and therapeutic approaches. Lancet Neurol 2020; 19:758-766. [DOI: 10.1016/s1474-4422(20)30231-3] [Citation(s) in RCA: 201] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 05/30/2020] [Accepted: 06/15/2020] [Indexed: 12/16/2022]
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Li RZ, Ding XW, Geetha T, Al-Nakkash L, Broderick TL, Babu JR. Beneficial Effect of Genistein on Diabetes-Induced Brain Damage in the ob/ob Mouse Model. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:3325-3336. [PMID: 32884237 PMCID: PMC7443039 DOI: 10.2147/dddt.s249608] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 07/06/2020] [Indexed: 01/26/2023]
Abstract
Purpose Diabetes mellitus (DM)-induced brain damage is characterized by cellular, molecular and functional changes. The mechanisms include oxidative stress, neuroinflammation, reduction of neurotrophic factors, insulin resistance, excessive amyloid beta (Aβ) deposition and Tau phosphorylation. Both antidiabetic and neuroprotective effects of the phytoestrogen genistein have been reported. However, the beneficial effect of genistein in brain of the ob/ob mouse model of severe obesity and diabetes remains to be determined. Methods In this study, female ob/ob mice and lean control mice were fed with either a standard diet or a diet containing genistein (600mg/kg) for a period of 4 weeks. Body weight was monitored weekly. Blood was collected for the measurement of glucose, insulin and common cytokines. Mice brains were isolated for Western immunoblotting analyses. Results Treatment with genistein reduced weight gain of ob/ob mice and decreased hyperglycemia compared to ob/ob mice fed the standard diet. The main findings show that genistein treatment increased insulin sensitivity and the expression levels of the neurotrophic factors nerve growth factor (NGF) and brain-derived neurotrophic factors (BDNF). In these mice, genistein also reduced Aβ deposition and the level of hyper-phosphorylated Tau protein. Conclusion The results of our study indicate the beneficial effects of genistein in the obese diabetic mouse brain, including improving brain insulin signaling, increasing neurotrophic support, and alleviating Alzheimer’s disease-related pathology.
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Affiliation(s)
- Rong-Zi Li
- Department of Nutrition, Dietetics and Hospitality Management, Auburn University, Auburn, AL 36849, USA
| | - Xiao-Wen Ding
- Department of Nutrition, Dietetics and Hospitality Management, Auburn University, Auburn, AL 36849, USA
| | - Thangiah Geetha
- Department of Nutrition, Dietetics and Hospitality Management, Auburn University, Auburn, AL 36849, USA
| | - Layla Al-Nakkash
- Department of Physiology, Laboratory of Diabetes and Exercise Metabolism, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
| | - Tom L Broderick
- Department of Physiology, Laboratory of Diabetes and Exercise Metabolism, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
| | - Jeganathan Ramesh Babu
- Department of Nutrition, Dietetics and Hospitality Management, Auburn University, Auburn, AL 36849, USA
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81
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Choi SE, Roy B, Freeby M, Mullur R, Woo MA, Kumar R. Prefrontal cortex brain damage and glycemic control in patients with type 2 diabetes. J Diabetes 2020; 12:465-473. [PMID: 31886635 PMCID: PMC7210044 DOI: 10.1111/1753-0407.13019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 11/25/2019] [Accepted: 12/26/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND This study examined brain tissue integrity in sites that controls cognition (prefrontal cortices; PFC) and its relationships to glycemic outcomes in adults with type 2 diabetes mellitus (T2DM). METHODS We examined 28 T2DM patients (median age 57.1 years; median body mass index [BMI] 30.6 kg/m2 ;11 males) and 47 healthy controls (median age 55.0 years; median BMI 25.8 kg/m2 ; 29 males) for cognition (Montreal Cognitive Assessment [MoCA]), glycemic control (hemoglobin A1c [HbA1c]), and PFC tissue status via brain magnetic resonance imaging (MRI). High-resolution T1-weighted images were collected using a 3.0-Tesla MRI scanner, and PFC tissue changes (tissue density) were examined with voxel-based morphometry procedures. RESULTS Reduced PFC density values were observed in T2DM patients compared to controls (left, 0.41 ± 0.02 mm3 /voxel vs 0.44 ± 0.02 mm3 /voxel, P < 0.001; right, 0.41 ± 0.03 mm3 /voxel vs 0.45 ± 0.02 mm3 /voxel, P < 0.001). PFC density values were positively correlated with cognition; left PFC region (r = 0.53, P = 0.005) and right PFC region (r = 0.56, P = 0.003), with age and sex as covariates. Significant negative correlations were found between PFC densities and HbA1c values; left PFC region (r = -0.39, P = 0.049) and right PFC region (r = -0.48, P = 0.01), with age and sex as covariates. CONCLUSIONS T2DM patients showed PFC brain tissue damage, which is associated with cognitive deficits and poor glycemic control. Further research is needed to identify causal relationships between HbA1c, cognition, and brain changes in T2DM and to evaluate the impact of interventions to prevent brain tissue injury or neuroregeneration in this high-risk patient population, to eventually preserve or enhance cognition and improve glucose outcomes.
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Affiliation(s)
- Sarah E Choi
- School of Nursing, University of California Los Angeles, Los Angeles, California
| | - Bhaswati Roy
- Department of Anesthesiology, David Geffen School of Medicine, Los Angeles, California
| | - Matthew Freeby
- Division of Endocrinology, Diabetes, & Metabolism, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California
| | - Rashmi Mullur
- Division of Endocrinology, Diabetes, & Metabolism, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California
| | - Mary A Woo
- School of Nursing, University of California Los Angeles, Los Angeles, California
| | - Rajesh Kumar
- Department of Anesthesiology, David Geffen School of Medicine, Los Angeles, California
- Radiological Sciences, University of California Los Angeles, Los Angeles, California
- Bioengineering, University of California Los Angeles, Los Angeles, California
- Brain Research Institute, University of California Los Angeles, Los Angeles, California
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82
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Keshk WA, Elseady WS, Sarhan NI, Zineldeen DH. Curcumin attenuates cytoplasmic/endoplasmic reticulum stress, apoptosis and cholinergic dysfunction in diabetic rat hippocampus. Metab Brain Dis 2020; 35:637-647. [PMID: 32172517 DOI: 10.1007/s11011-020-00551-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 02/17/2020] [Indexed: 11/28/2022]
Abstract
Diabetes mellitus (DM) is associated with the increased risk of the central nervous system complications as cerebrovascular disease, impaired cognition, dementia and neurodegeneration. Curcumin is a polyphenol with anti-oxidant, anti-inflammatory, anti-hyperlipidemic, and anti-cancer effects. Therefore, the present study was aimed to focus on the mechanistic insights of diabetes-induced hippocampal neurodegeneration in addition to shedding the light on the modulatory effect of curcumin. Twenty-eight male Wistar rats were randomly divided into four groups. Type I DM was induced by a single intra-peritoneal injection of streptozotocin (STZ) (65 mg/kg b.w.). Curcumin (100 mg/kg b.w.) was given to the diabetic group after the induction and for eight weeks. Hippocampal glucose-regulated protein 78 (GRP78), activating transcription factor 4 (ATF-4), Bcl2 and choline acetyl transferase (ChAT) genes expression were assessed. Heat shock protein 70 (HSP70), Bcl-2-Associated X protein (Bax), Interferon-γ (INF-γ) and CCAAT-enhancer-binding protein homologous protein (CHOP) levels in the hippocampus were immunoassayed, in addition to the assessment of glycemic and redox status. Curcumin significantly improved blood glucose level, redox status, cellular stress, and decreased INF-γ and Bax levels, down-regulated GRP78 and ATF-4 expression, meanwhile, up-regulated Bcl2 and ChAT expression in hippocampus. Histological findings proved the biochemical and molecular findings. Our results support curcumin as a potential neuro-protective agent against diabetes induced hippocampal neurodegeneration.
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Affiliation(s)
- Walaa A Keshk
- Department of Medical Biochemistry & Molecular Biology, Faculty of Medicine, Tanta University, Tanta, Egypt.
| | - Walaa S Elseady
- Department of anatomy, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Naglaa I Sarhan
- Department of histology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Doaa H Zineldeen
- Department of Medical Biochemistry & Molecular Biology, Faculty of Medicine, Tanta University, Tanta, Egypt
- Suliman Alrajhi University, Bukayriyah, Qassim, Saudi Arabia
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83
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Liu J, Fan W, Jia Y, Su X, Wu W, Long X, Sun X, Liu J, Sun W, Zhang T, Gong Q, Shi H, Zhu Q, Wang J. Altered Gray Matter Volume in Patients With Type 1 Diabetes Mellitus. Front Endocrinol (Lausanne) 2020; 11:45. [PMID: 32117070 PMCID: PMC7031205 DOI: 10.3389/fendo.2020.00045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 01/24/2020] [Indexed: 02/05/2023] Open
Abstract
Background and Purpose: Many imaging studies have reported structure alterations in patients with type 1 diabetes mellitus (T1DM) by using voxel-based morphometry (VBM). Nevertheless, the results reported were inconsistent and had not been reviewed quantitatively. Accordingly, the quantitative meta-analysis which including VBM studies of patients with T1DM was conducted. Materials and Methods: The gray matter volume alterations in patients with T1DM was estimated by using the software seed-based d mapping. Meantime, the meta-regression was applied to detect the effects of some demographics and clinical characteristics. Results: Six studies were finally included, which with 6 datasets comprising 414 T1DM patients and 216 healthy controls. The pooled meta-analyses detected that patients with T1DM showed robustly increased gray matter volume in the left dorsolateral superior frontal gyrus and middle frontal gyrus and a decreased gray matter volume in the right lingual gyrus, cerebellum, precuneus, the left inferior temporal gyrus, and middle temporal gyrus. The meta-regression showed that the mean age, the female patient's ratio, duration of illness and HbAlc% for T1DM patients were not linearly related with gray matter alterations. Conclusion: This meta-analysis demonstrates that gray matter volume decreases in T1DM patients were mainly locates in the cortical regions and cerebellum.
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Affiliation(s)
- Jia Liu
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Wenliang Fan
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Yuxi Jia
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Xiaoyun Su
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Wenjun Wu
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Xi Long
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Xin Sun
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Jie Liu
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Wengang Sun
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | | | - Qiyong Gong
- Department of Radiology, Huaxi MR Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Haojun Shi
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
- *Correspondence: Haojun Shi
| | - Qing Zhu
- Department of Neurology, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
- Qing Zhu
| | - Jing Wang
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
- Jing Wang
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84
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Kuchmerovska TM, Dyakun KO, Guzyk MM, Yanytska LV, Pryvrotska IB. Effects of a Combined Mitochondria-Targeted Treatment on the State of Mitochondria and Synaptic Membranes from the Brains of Diabetic Rats. NEUROPHYSIOLOGY+ 2019. [DOI: 10.1007/s11062-019-09816-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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85
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Voxel-based morphometry reveals regional reductions of gray matter volume in school-aged children with short-term type 1 diabetes mellitus. Neuroreport 2019; 30:516-521. [PMID: 30913134 DOI: 10.1097/wnr.0000000000001238] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Follow-up observation is needed for type 1 diabetes mellitus (T1DM) children due to the potential injury to the brain. However, the effect of short-term T1DM on gray matter in school-aged children is still unclear. This study aimed to evaluate gray matter volume (GMV) changes and their relationships with clinical variables in school-aged children with short-term T1DM. Twenty-one school-aged T1DM children were compared with 21 control patients, matched for sex and age. T1-weighted gradient echo three-dimensional MRI was performed using a 3.0-Tesla scanner and the resulting images were processed with FSL software to assess the difference in GMV between the two groups. The children with T1DM presented with decreased GMV in the left middle temporal gyrus (LMTG), the right postcentral gyrus, and the left triangular part of the frontal inferior gyrus (LTP-FIG). No significant changes in intelligence quotient (IQ) were found between the T1DM and control groups. In T1DM patients, there was a significant positive correlation between the GMV of LMTG and full-scale IQ or linguistic IQ. In addition, an increased glycosylated hemoglobin level was negatively correlated with reduced GMV in the LMTG and LTP-FIG in the T1DM group. These findings suggest that short-term T1DM could lead to regional structural brain deficits in school-aged children. The GMV of the LMTG may affect IQ, and poor recent glycemic control may have an adverse effect on GMV in the LMTG and LTP-FIG in T1DM children.Video abstract: http://links.lww.com/WNR/A506.
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86
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Wang S, He B, Hang W, Wu N, Xia L, Wang X, Zhang Q, Zhou X, Feng Z, Chen Q, Chen J. Berberine Alleviates Tau Hyperphosphorylation and Axonopathy-Associated with Diabetic Encephalopathy via Restoring PI3K/Akt/GSK3β Pathway. J Alzheimers Dis 2019; 65:1385-1400. [PMID: 30175975 DOI: 10.3233/jad-180497] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Axonopathy is closely linked to the development of diabetic encephalopathy induced by type II diabetes (T2D). Berberine has been shown to cross the blood-brain barrier and holds promising effect for neuronal damage in diabetes. OBJECTIVE The present study investigated the protective effect and the underlying mechanism of berberine on neuronal axonopathy in both in vitro and in vivo models. METHODS High glucose/high fat diet and streptozotocin injection-induced T2D rat model was used. Berberine was administered p.o. to T2D rat model for 10 weeks. Morris water maze test, in vivo neuronal tracing, immunohistochemistry, and western blot analysis were performed to evaluate the protective effects of berberine in T2D-induced diabetic encephalopathy rats. Primary cultured neurons were used to further explore the underlying mechanisms in vitro. RESULTS Berberine dramatically reduced blood glucose and serum insulin levels and alleviated insulin resistance. Berberine significantly attenuated memory impairment, axonopathy, and tau hyperphosphorylation, and also restored PI3K/Akt/GSK3β signaling pathway in T2D rats. In vitro, berberine induced an increase in the phosphorylation of PI3K/Akt as well as GSK3β in high glucose-treated primary neurons. Furthermore, berberine-induced PI3K/Akt activation also resulted in the dephosphorylation of tau protein, which could improve axonal transport impairment in high glucose-treated primary neurons. Pretreated neurons with LY294002, an inhibitor of PI3K, partially blocked berberine-inhibited tau phosphorylation and berberine-activated PI3K/Akt signaling pathway. CONCLUSIONS Berberine exerts the protective effect against cognitive deficits by improving tau hyperphosphorylation and the axonal damage through restoring PI3K/Akt/GSK3β signaling pathway.
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Affiliation(s)
- Shanshan Wang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Benhong He
- Department of Cardiovascular Medicine, Lichuan People's Hospital, Lichuan, Hubei, China
| | - Weijian Hang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - NingHua Wu
- Hubei Key Laboratory of Cardiovascular, Cerebrovascular, and Metabolic Disorders, Hubei University of Science and Technology, Xianning, Hubei, China
| | - Liangtao Xia
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xu Wang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qianying Zhang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xinwen Zhou
- Institute for Brain Research, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Key Laboratory of Neurological Disease of National Education Ministry, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zuohua Feng
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qingjie Chen
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,New products of TCM Senile Diseases Co-Innovation Center of Hubei, Basic Medical Sciences College, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Juan Chen
- Department of Biochemistry and Molecular Biology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Institute for Brain Research, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Key Laboratory of Neurological Disease of National Education Ministry, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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87
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Fiory F, Perruolo G, Cimmino I, Cabaro S, Pignalosa FC, Miele C, Beguinot F, Formisano P, Oriente F. The Relevance of Insulin Action in the Dopaminergic System. Front Neurosci 2019; 13:868. [PMID: 31474827 PMCID: PMC6706784 DOI: 10.3389/fnins.2019.00868] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 08/02/2019] [Indexed: 12/13/2022] Open
Abstract
The advances in medicine, together with lifestyle modifications, led to a rising life expectancy. Unfortunately, however, aging is accompanied by an alarming boost of age-associated chronic pathologies, including neurodegenerative and metabolic diseases. Interestingly, a non-negligible interplay between alterations of glucose homeostasis and brain dysfunction has clearly emerged. In particular, epidemiological studies have pointed out a possible association between Type 2 Diabetes (T2D) and Parkinson’s Disease (PD). Insulin resistance, one of the major hallmark for etiology of T2D, has a detrimental influence on PD, negatively affecting PD phenotype, accelerating its progression and worsening cognitive impairment. This review aims to provide an exhaustive analysis of the most recent evidences supporting the key role of insulin resistance in PD pathogenesis. It will focus on the relevance of insulin in the brain, working as pro-survival neurotrophic factor and as a master regulator of neuronal mitochondrial function and oxidative stress. Insulin action as a modulator of dopamine signaling and of alpha-synuclein degradation will be described in details, too. The intriguing idea that shared deregulated pathogenic pathways represent a link between PD and insulin resistance has clinical and therapeutic implications. Thus, ongoing studies about the promising healing potential of common antidiabetic drugs such as metformin, exenatide, DPP IV inhibitors, thiazolidinediones and bromocriptine, will be summarized and the rationale for their use to decelerate neurodegeneration will be critically assessed.
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Affiliation(s)
- Francesca Fiory
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Giuseppe Perruolo
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Ilaria Cimmino
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Serena Cabaro
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Francesca Chiara Pignalosa
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Claudia Miele
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Francesco Beguinot
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Pietro Formisano
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
| | - Francesco Oriente
- Department of Translational Medicine, University of Naples Federico II, Naples, Italy.,URT "Genomic of Diabetes," Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy
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88
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The neuroprotection of liraglutide on diabetic cognitive deficits is associated with improved hippocampal synapses and inhibited neuronal apoptosis. Life Sci 2019; 231:116566. [DOI: 10.1016/j.lfs.2019.116566] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/05/2019] [Accepted: 06/12/2019] [Indexed: 12/27/2022]
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89
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Changes of Blood-Brain Barrier and Brain Parenchymal Protein Expression Levels of Mice under Different Insulin-Resistance Conditions Induced by High-Fat Diet. Pharm Res 2019; 36:141. [PMID: 31367840 DOI: 10.1007/s11095-019-2674-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/20/2019] [Indexed: 12/13/2022]
Abstract
PURPOSE The purpose of the present study was to investigate changes of blood-brain barrier (BBB) and brain parenchymal protein expression due to type II diabetes mellitus (T2DM) induced by a high-fat diet (HFD) by using SWATH-based quantitative proteomics. METHODS Mice were fed a HFD for 2 or 10 weeks, and then SWATH-based quantitative proteomic analysis, western blot analysis, immunohistochemistry and functional transport studies were performed. RESULTS In brain capillaries, expression levels of BBB transporters (Glut1, P-glycoprotein) and tight-junction proteins (claudin-5, occludin) were significantly reduced in HFD mice at 2 weeks, but recovered to the levels in the normal diet (ND) group at 10 weeks. P-glycoprotein function at the BBB was reduced at 2 weeks. In the cerebral cortex and hippocampus, neurofilament, which is important for neuronal function, was decreased in HFD mice at 2 weeks, but recovered at 10 weeks. CONCLUSION Our results suggest that changes in the status of insulin resistance influence expression of BBB transporters, which in turn may alter the expression of cognitive function-related proteins.
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90
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Yan W, Zhang M, Yu Y, Yi X, Guo T, Hu H, Sun Q, Chen M, Xiong H, Chen L. Blockade of voltage-gated potassium channels ameliorates diabetes-associated cognitive dysfunction in vivo and in vitro. Exp Neurol 2019; 320:112988. [PMID: 31254519 DOI: 10.1016/j.expneurol.2019.112988] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 03/29/2019] [Accepted: 06/25/2019] [Indexed: 12/12/2022]
Abstract
The voltage-gated potassium (Kv) channel blockers tetraethylammonium (TEA) and 4-aminopyridine (4-AP) have shown beneficial effects on some neurological disorders. But their involvements in diabetes-associated cognitive dysfunction are still unknown. The present study aims to investigate whether the blockade of Kv channels by TEA and 4-AP alleviate cognitive decline in diabetes. In vivo, the effects of TEA and 4-AP (5 mg/kg body weight per day, 1 mg/kg body weight per day intraperitoneal injected for 4 weeks, respectively) were investigated in streptozotocin-induced C57BL/6 diabetic mice. In vitro study, we investigated the effects of TEA and 4-AP on the high glucose (HG) -stimulated primary cortical neurons. The results showed that TEA and 4-AP ameliorated the cognitive decline of diabetic mice in the Morris water maze test, improved the ultrastructure of pancreatic β cells, hippocampal neurons and synapses, decreased oxidative stress, modulated apoptosis-related proteins, and activated phosphatidylinositol 3-kinase (PI3K)/ Protein kinase-B (PKB or Akt) signaling pathway. In the HG-stimulated primary cultured cortical neurons, TEA and 4-AP increased the cell viability, decreased oxidative stress; prevented apoptosis and activated PI3K/Akt signaling pathway. Additionally, the PI3K inhibitor LY294002 partially abolished the effects of TEA and 4-AP. These findings indicate that the blockade of Kv channels by TEA and 4-AP ameliorates the diabetes-associated cognitive dysfunction via PI3K/Akt pathway, suggesting that targeting Kv channels could be a promising strategy for the treatments of cognitive impairments in diabetes.
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Affiliation(s)
- Wenhui Yan
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China
| | - Meng Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China
| | - Ye Yu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China
| | - Xinyao Yi
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China
| | - Tingli Guo
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China
| | - Hao Hu
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China
| | - Qiang Sun
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China
| | - Mingxia Chen
- Electron Microscopy Room, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China
| | - Huangui Xiong
- Neurophysiology Laboratory, Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE 68198-5880, USA.
| | - Lina Chen
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an 710061, Shaanxi, China.
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91
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Lin HT, Cheng ML, Lo CJ, Lin G, Lin SF, Yeh JT, Ho HY, Lin JR, Liu FC. 1H Nuclear Magnetic Resonance (NMR)-Based Cerebrospinal Fluid and Plasma Metabolomic Analysis in Type 2 Diabetic Patients and Risk Prediction for Diabetic Microangiopathy. J Clin Med 2019; 8:jcm8060874. [PMID: 31248127 PMCID: PMC6616639 DOI: 10.3390/jcm8060874] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/15/2019] [Accepted: 06/16/2019] [Indexed: 01/07/2023] Open
Abstract
Insulin resistance and metabolic derangement are present in patients with type 2 diabetes mellitus (T2DM). However, the metabolomic signature of T2DM in cerebrospinal fluid (CSF) has not been investigated thus far. In this prospective metabolomic study, fasting CSF and plasma samples from 40 T2DM patients to 36 control subjects undergoing elective surgery with spinal anesthesia were analyzed by 1H nuclear magnetic resonance (NMR) spectroscopy. NMR spectra of CSF and plasma metabolites were analyzed and correlated with the presence of T2DM and diabetic microangiopathy (retinopathy, nephropathy, and neuropathy) using an area under the curve (AUC) estimation. CSF metabolomic profiles in T2DM patients vs. controls revealed significantly increased levels of alanine, leucine, valine, tyrosine, lactate, pyruvate, and decreased levels of histidine. In addition, a combination of alanine, histidine, leucine, pyruvate, tyrosine, and valine in CSF showed a superior correlation with the presence of T2DM (AUC:0.951), diabetic retinopathy (AUC:0.858), nephropathy (AUC:0.811), and neuropathy (AUC:0.691). Similar correlations also appeared in plasma profiling. These metabolic alterations in CSF suggest decreasing aerobic metabolism and increasing anaerobic glycolysis in cerebral circulation of patients with T2DM. In conclusion, our results provide clues for the metabolic derangements in diabetic central neuropathy among T2DM patients; however, their clinical significance requires further exploration.
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Affiliation(s)
- Huan-Tang Lin
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
- College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
| | - Mei-Ling Cheng
- Metabolomics Core Laboratory, Healthy Aging Research Center, Chang Gung University, Taoyuan 333, Taiwan.
- Department of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
- Clinical Metabolomics Core Laboratory, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
| | - Chi-Jen Lo
- Metabolomics Core Laboratory, Healthy Aging Research Center, Chang Gung University, Taoyuan 333, Taiwan.
| | - Gigin Lin
- Clinical Metabolomics Core Laboratory, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
- Department of Medical Imaging and Intervention, Imaging Core Lab, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
| | - Shu-Fu Lin
- Department of Endocrinology and Metabolism, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
| | - Jiun-Ting Yeh
- Division of Trauma, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
| | - Hung-Yao Ho
- Healthy Aging Research Center, Chang Gung University, Taoyuan 333, Taiwan.
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
| | - Jr-Rung Lin
- Clinical Informatics and Medical Statistics Research Center and Graduate Institute of Clinical Medicine, Chang Gung University, Taoyuan 333, Taiwan.
| | - Fu-Chao Liu
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
- College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
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92
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Talboom JS, Håberg A, De Both MD, Naymik MA, Schrauwen I, Lewis CR, Bertinelli SF, Hammersland C, Fritz MA, Myers AJ, Hay M, Barnes CA, Glisky E, Ryan L, Huentelman MJ. Family history of Alzheimer's disease alters cognition and is modified by medical and genetic factors. eLife 2019; 8:46179. [PMID: 31210642 PMCID: PMC6615857 DOI: 10.7554/elife.46179] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 06/13/2019] [Indexed: 01/02/2023] Open
Abstract
In humans, a first-degree family history of dementia (FH) is a well-documented risk factor for Alzheimer’s disease (AD); however, the influence of FH on cognition across the lifespan is poorly understood. To address this issue, we developed an internet-based paired-associates learning (PAL) task and tested 59,571 participants between the ages of 18–85. FH was associated with lower PAL performance in both sexes under 65 years old. Modifiers of this effect of FH on PAL performance included age, sex, education, and diabetes. The Apolipoprotein E ε4 allele was also associated with lower PAL scores in FH positive individuals. Here we show, FH is associated with reduced PAL performance four decades before the typical onset of AD; additionally, several heritable and non-heritable modifiers of this effect were identified.
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Affiliation(s)
- Joshua S Talboom
- The Translational Genomics Research Institute, Phoenix, United States.,Arizona Alzheimer's Consortium, Phoenix, United States
| | - Asta Håberg
- Norwegian University of Science and Technology, Trondheim, Norway
| | - Matthew D De Both
- The Translational Genomics Research Institute, Phoenix, United States.,Arizona Alzheimer's Consortium, Phoenix, United States
| | - Marcus A Naymik
- The Translational Genomics Research Institute, Phoenix, United States.,Arizona Alzheimer's Consortium, Phoenix, United States
| | - Isabelle Schrauwen
- The Translational Genomics Research Institute, Phoenix, United States.,Arizona Alzheimer's Consortium, Phoenix, United States
| | - Candace R Lewis
- The Translational Genomics Research Institute, Phoenix, United States.,Arizona Alzheimer's Consortium, Phoenix, United States
| | | | | | - Mason A Fritz
- The Translational Genomics Research Institute, Phoenix, United States
| | | | - Meredith Hay
- Arizona Alzheimer's Consortium, Phoenix, United States.,University of Arizona, Tucson, United States
| | - Carol A Barnes
- Arizona Alzheimer's Consortium, Phoenix, United States.,University of Arizona, Tucson, United States
| | - Elizabeth Glisky
- Arizona Alzheimer's Consortium, Phoenix, United States.,University of Arizona, Tucson, United States
| | - Lee Ryan
- Arizona Alzheimer's Consortium, Phoenix, United States.,University of Arizona, Tucson, United States
| | - Matthew J Huentelman
- The Translational Genomics Research Institute, Phoenix, United States.,Arizona Alzheimer's Consortium, Phoenix, United States
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93
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Han R, Liu Z, Sun N, Liu S, Li L, Shen Y, Xiu J, Xu Q. BDNF Alleviates Neuroinflammation in the Hippocampus of Type 1 Diabetic Mice via Blocking the Aberrant HMGB1/RAGE/NF-κB Pathway. Aging Dis 2019; 10:611-625. [PMID: 31165005 PMCID: PMC6538223 DOI: 10.14336/ad.2018.0707] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/07/2018] [Indexed: 01/12/2023] Open
Abstract
Diabetes is a systemic disease that can cause brain damage such as synaptic impairments in the hippocampus, which is partly because of neuroinflammation induced by hyperglycemia. Brain-derived neurotrophic factor (BDNF) is essential in modulating neuroplasticity. Its role in anti-inflammation in diabetes is largely unknown. In the present study, we investigated the effects of BDNF overexpression on reducing neuroinflammation and the underlying mechanism in mice with type 1 diabetes induced by streptozotocin (STZ). Animals were stereotactically microinjected in the hippocampus with recombinant adeno-associated virus (AAV) expressing BDNF or EGFP. After virus infection, four groups of mice, the EGFP+STZ, BDNF+STZ, EGFP Control and BDNF Control groups, received STZ or vehicle treatment as indicated. Three weeks later brain tissues were collected. We found that BDNF overexpression in the hippocampus significantly rescued STZ-induced decreases in mRNA and protein expression of two synaptic plasticity markers, spinophilin and synaptophysin. More interestingly, BDNF inhibited hyperglycemia-induced microglial activation and reduced elevated levels of inflammatory factors (TNF-α, IL-6). BDNF blocked the increase in HMGB1 levels and specifically, in levels of one of the HMGB1 receptors, RAGE. Downstream of HMGB1/RAGE, the increase in the protein level of phosphorylated NF-κB was also reversed by BDNF in STZ-treated mice. These results show that BDNF overexpression reduces neuroinflammation in the hippocampus of type 1 diabetic mice and suggest that the HMGB1/RAGE/NF-κB signaling pathway may contribute to alleviation of neuroinflammation by BDNF in diabetic mice.
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Affiliation(s)
- Rongrong Han
- 1State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China.,2Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China
| | - Zeyue Liu
- 1State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China.,2Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China
| | - Nannan Sun
- 1State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China.,2Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China
| | - Shu Liu
- 1State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China.,2Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China
| | - Lanlan Li
- 1State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China.,2Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China
| | - Yan Shen
- 1State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China.,2Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China
| | - Jianbo Xiu
- 1State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China.,2Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China
| | - Qi Xu
- 1State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China.,2Neuroscience center, Chinese Academy of Medical Sciences, Beijing, China
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94
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Review of the Effect of Natural Compounds and Extracts on Neurodegeneration in Animal Models of Diabetes Mellitus. Int J Mol Sci 2019; 20:ijms20102533. [PMID: 31126031 PMCID: PMC6566911 DOI: 10.3390/ijms20102533] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/17/2019] [Accepted: 05/18/2019] [Indexed: 12/14/2022] Open
Abstract
Diabetes mellitus is a chronic metabolic disease with a high prevalence in the Western population. It is characterized by pancreas failure to produce insulin, which involves high blood glucose levels. The two main forms of diabetes are type 1 and type 2 diabetes, which correspond with >85% of the cases. Diabetes shows several associated alterations including vascular dysfunction, neuropathies as well as central complications. Brain alterations in diabetes are widely studied; however, the mechanisms implicated have not been completely elucidated. Diabetic brain shows a wide profile of micro and macrostructural changes, such as neurovascular deterioration or neuroinflammation leading to neurodegeneration and progressive cognition dysfunction. Natural compounds (single isolated compounds and/or natural extracts) have been widely assessed in metabolic disorders and many of them have also shown antioxidant, antiinflamatory and neuroprotective properties at central level. This work reviews natural compounds with brain neuroprotective activities, taking into account several therapeutic targets: Inflammation and oxidative stress, vascular damage, neuronal loss or cognitive impairment. Altogether, a wide range of natural extracts and compounds contribute to limit neurodegeneration and cognitive dysfunction under diabetic state. Therefore, they could broaden therapeutic alternatives to reduce or slow down complications associated with diabetes at central level.
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95
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Farbood Y, Rashno M, Ghaderi S, Khoshnam SE, Sarkaki A, Rashidi K, Rashno M, Badavi M. Ellagic acid protects against diabetes-associated behavioral deficits in rats: Possible involved mechanisms. Life Sci 2019; 225:8-19. [PMID: 30943382 DOI: 10.1016/j.lfs.2019.03.078] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/23/2019] [Accepted: 03/30/2019] [Indexed: 12/16/2022]
Abstract
AIMS Diabetes mellitus (DM), a chronic metabolic disease, is associated with behavioral deficits. It has been suggested that ellagic acid (EA), a natural polyphenol compound, has potent anti-diabetic, anti-inflammatory, and neuroprotective properties. The present study was aimed to explore the potential protective effects of EA against diabetes-associated behavioral deficits and verified possible involved mechanisms. MAIN METHODS Fifty adult male Wistar rats were randomly divided into five groups: i.e., CON: normal rats treated with vehicle (5 ml/kg/day; P.O.), EA: normal rats treated with EA (50 mg/kg/day; P.O.), STZ: diabetic rats treated with vehicle (5 ml/kg/day; P.O.), STZ + INS: diabetic rats treated with insulin (6 IU/rat/day; S.C.), STZ + EA: diabetic rats treated with EA (50 mg/kg/day; P.O.). All the groups were under treatment for eight consecutive weeks. During the seventh and eighth weeks, behavioral functions of the rats were assessed by commonly used behavioral tests. Subsequently, pro- and anti-inflammatory cytokines, neurotrophic factors, and also histological changes were evaluated in both cerebral cortex and hippocampus of the rats. KEY FINDINGS Chronic EA treatment attenuated anxiety/depression-like behaviors, improved exploratory/locomotor activities, and ameliorated cognitive deficits in diabetic rats. These results were accompanied by decreased blood glucose levels, modulation of inflammation status, improved neurotrophic support, and amelioration of neuronal loss in diabetic rats. In some aspects, treatment with EA was even more effective than insulin therapy. SIGNIFICANCE The current work's data confirms that EA could potentially serve as a novel, promising, and accessible protective agent against diabetes-associated behavioral deficits, owing to its anti-hyperglycemic, anti-inflammatory, and neurotrophic properties.
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96
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Abdulle LE, Hao JL, Pant OP, Liu XF, Zhou DD, Gao Y, Suwal A, Lu CW. MALAT1 as a Diagnostic and Therapeutic Target in Diabetes-Related Complications: A Promising Long-Noncoding RNA. Int J Med Sci 2019; 16:548-555. [PMID: 31171906 PMCID: PMC6535662 DOI: 10.7150/ijms.30097] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 02/08/2019] [Indexed: 02/06/2023] Open
Abstract
Diabetes mellitus is a global issue with increasing incidence rate worldwide. In an uncontrolled case, it can advance to various organ-related complications leading to an increase in morbidity and mortality. Long non-coding RNA (lncRNA) Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) appears to be a fairly novel lncRNA that is relevant to diabetes and its role in diabetic-related diseases initiation and progression have long been a subject of attention to many scholars. The expression of MALAT1 is elevated in different diabetic-related diseases. In this review, we demonstrate the various functions of MALAT1 in the different diabetes-related complications including ischemic reperfusion injury, retinopathy, cataract, atherosclerosis, cardiomyopathy, non-alcoholic steatohepatitis, gastroparesis, kidney disease, and gestational diabetes. The emerging evidence showed that the role of MALAT1 in diabetic-related complications is both pro-inflammatory and apoptosis in different cell types. These results concluded that MALAT1 is a potential diagnostic and future targeted therapy for diabetes-associated complications.
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Affiliation(s)
| | | | | | | | | | - Ying Gao
- Department of Endocrinology, The First Hospital of Jilin University, No. 71 of Xinmin St. Changchun, Jilin Province, 130021, China
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97
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Maternal Cognitive Impairment Associated with Gestational Diabetes Mellitus-A Review of Potential Contributing Mechanisms. Int J Mol Sci 2018; 19:ijms19123894. [PMID: 30563117 PMCID: PMC6321050 DOI: 10.3390/ijms19123894] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 11/14/2018] [Accepted: 11/29/2018] [Indexed: 12/16/2022] Open
Abstract
Gestational diabetes mellitus (GDM) carries many risks, where high blood pressure, preeclampsia and future type II diabetes are widely acknowledged, but less focus has been placed on its effect on cognitive function. Although the multifactorial pathogenesis of maternal cognitive impairment is not completely understood, it shares several features with type 2 diabetes mellitus (T2DM). In this review, we discuss some key pathophysiologies of GDM that may lead to cognitive impairment, specifically hyperglycemia, insulin resistance, oxidative stress, and neuroinflammation. We explain how these incidents: (i) impair the insulin-signaling pathway and/or (ii) lead to cognitive impairment through hyperphosphorylation of τ protein, overexpression of amyloid-β and/or activation of microglia. The aforementioned pathologies impair the insulin-signaling pathway primarily through serine phosphorylation of insulin receptor substances (IRS). This then leads to the inactivation of the phosphatidylinositol 3-kinase/Protein kinase B (PI3K/AKT) signaling cascade, which is responsible for maintaining brain homeostasis and normal cognitive functioning. PI3K/AKT is crucial in maintaining normal cognitive function through the inactivation of glycogen synthase kinase 3β (GSκ3β), which hyperphosphorylates τ protein and releases pro-inflammatory cytokines that are neurotoxic. Several biomarkers were also highlighted as potential biomarkers of GDM-related cognitive impairment such as AGEs, serine-phosphorylated IRS-1 and inflammatory markers such as tumor necrosis factor α (TNF-α), high-sensitivity C-reactive protein (hs-CRP), leptin, interleukin 1β (IL-1β), and IL-6. Although GDM is a transient disease, its complications may be long-term, and hence increased mechanistic knowledge of the molecular changes contributing to cognitive impairment may provide important clues for interventional strategies.
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98
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Flores-Gómez AA, de Jesús Gomez-Villalobos M, Flores G. Consequences of diabetes mellitus on neuronal connectivity in limbic regions. Synapse 2018; 73:e22082. [PMID: 30457679 DOI: 10.1002/syn.22082] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 10/25/2018] [Accepted: 11/15/2018] [Indexed: 12/18/2022]
Abstract
Diabetes mellitus (DM) is characterized by high levels of blood glucose. In recent years, its prevalence has increased, which was 422 million in the world in 2014. In elderly patients, DM is associated with deficits in memory and learning processes. The cognitive deficits lead to dementia. With the development of animal models in DM, it has been possible to better understand quantitative morphological changes in numerous neuronal structures belonging to the limbic system, such as the prefrontal cortex (PFC), the hippocampus and basolateral amygdala (BLA). These structures are in close relationship with processes of memory and learning. Several reports have demonstrated that chronic hyperglycemia reduces spinogenesis and dendritic arborization in the aforementioned regions along with a decline in memory and learning processes, especially in streptozotocin (STZ)-induced diabetic rats. In the present review, we discuss animal models, the effects of chronic hyperglycemia on dendritic morphology of limbic regions and memory and learning processes, the effect on neural transmission in these regions, the pathologic mechanisms involved, and the relevance of dendritic morphology in diabetes. All of this information can help us to have a better understanding of dementia in diabetes mellitus and propose strategies for its prevention and treatment.
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Affiliation(s)
| | | | - Gonzalo Flores
- Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla, Puebla, México
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99
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Hardeland R. Melatonin and inflammation-Story of a double-edged blade. J Pineal Res 2018; 65:e12525. [PMID: 30242884 DOI: 10.1111/jpi.12525] [Citation(s) in RCA: 270] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 09/10/2018] [Accepted: 09/14/2018] [Indexed: 12/13/2022]
Abstract
Melatonin is an immune modulator that displays both pro- and anti-inflammatory properties. Proinflammatory actions, which are well documented by many studies in isolated cells or leukocyte-derived cell lines, can be assumed to enhance the resistance against pathogens. However, they can be detrimental in autoimmune diseases. Anti-inflammatory actions are of particular medicinal interest, because they are observed in high-grade inflammation such as sepsis, ischemia/reperfusion, and brain injury, and also in low-grade inflammation during aging and in neurodegenerative diseases. The mechanisms contributing to anti-inflammatory effects are manifold and comprise various pathways of secondary signaling. These include numerous antioxidant effects, downregulation of inducible and inhibition of neuronal NO synthases, downregulation of cyclooxygenase-2, inhibition of high-mobility group box-1 signaling and toll-like receptor-4 activation, prevention of inflammasome NLRP3 activation, inhibition of NF-κB activation and upregulation of nuclear factor erythroid 2-related factor 2 (Nrf2). These effects are also reflected by downregulation of proinflammatory and upregulation of anti-inflammatory cytokines. Proinflammatory actions of amyloid-β peptides are reduced by enhancing α-secretase and inhibition of β- and γ-secretases. A particular role in melatonin's actions seems to be associated with the upregulation of sirtuin-1 (SIRT1), which shares various effects known from melatonin and additionally interferes with the signaling by the mechanistic target of rapamycin (mTOR) and Notch, and reduces the expression of the proinflammatory lncRNA-CCL2. The conclusion on a partial mediation by SIRT1 is supported by repeatedly observed inhibitions of melatonin effects by sirtuin inhibitors or knockdown.
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Affiliation(s)
- Rüdiger Hardeland
- Johann Friedrich Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany
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100
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The effects of safranal, a constitute of saffron, and metformin on spatial learning and memory impairments in type-1 diabetic rats: behavioral and hippocampal histopathological and biochemical evaluations. Biomed Pharmacother 2018; 107:203-211. [DOI: 10.1016/j.biopha.2018.07.165] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 07/28/2018] [Accepted: 07/31/2018] [Indexed: 12/15/2022] Open
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