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Islam J, Islam Z, Haque N, Khatun M, Islam F, Hossain S, Hoque MA, Nikkon F, Hossain K, Saud ZA. Fenugreek seed powder protects mice against arsenic-induced neurobehavioral changes. Curr Res Toxicol 2023; 5:100114. [PMID: 37554151 PMCID: PMC10404539 DOI: 10.1016/j.crtox.2023.100114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 07/09/2023] [Accepted: 07/11/2023] [Indexed: 08/10/2023] Open
Abstract
The current study was designed to evaluate the protective effect of fenugreek seed powder against As-induced neurobehavioral and biochemical perturbations using a mouse model. Mice exposed to arsenic at 10 mg/kg body weight showed development of anxiety-like behavior and memory impairment compared to control mice in elevated plus maze and Morris water maze tests, respectively. A significantly decreased acetyl and butyrylcholinesterase, superoxide dismutase and glutathione reductase activities and brain-derived neurotrophic factor levels were found in the brain of arsenic-exposed mice compared to control mice. Interestingly, supplementation of fenugreek seed powder to arsenic-treated mice significantly restored the activity of cholinesterase and antioxidant enzymes (e.g. superoxide dismutase, glutathione reductase) as well as brain-derived neurotrophic factor levels in the brain tissue of arsenic-exposed mice. Consequently, reduced anxiety-like behavior, improved learning and memory were observed in fenugreek supplemented arsenic treated mice compared to only arsenic-exposed mice group. Thus, this study suggests that fenugreek seed powder reduces arsenic-induced neurotoxicity in mice.
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Affiliation(s)
| | | | - Nazmul Haque
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Moriom Khatun
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Farhadul Islam
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Shakhawoat Hossain
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Md Ashraful Hoque
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Farjana Nikkon
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Khaled Hossain
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Zahangir Alam Saud
- Department of Biochemistry and Molecular Biology, University of Rajshahi, Rajshahi 6205, Bangladesh
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2
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Zheng J, Wu X. Chorea: An unusual manifestation of endocrine diseases. Front Endocrinol (Lausanne) 2023; 14:1155638. [PMID: 36936169 PMCID: PMC10020596 DOI: 10.3389/fendo.2023.1155638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 02/20/2023] [Indexed: 03/06/2023] Open
Abstract
Chorea is a movement disorder involving involuntary movements of muscles of the face, neck, and limbs, usually caused by basal ganglia lesions. As an important part of the presentation of many neurological diseases, chorea is also an unusual manifestation of endocrine diseases and can be challenging to diagnose. Although the most common etiology of chorea is genetic, it is vital to identify acquired or symptomatic chorea, as these are potentially treatable conditions. This review summarizes the latest developments in various endocrine disease-related chorea, which will help clinicians to correctly identify and accurately treat it.
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3
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Islam Z, Islam J, Tony SR, Anjum A, Ferdous R, Roy AK, Hossain S, Salam KA, Nikkon F, Hossain K, Saud ZA. Mulberry leaves juice attenuates arsenic-induced neurobehavioral and hepatic disorders in mice. Food Sci Nutr 2022; 10:4360-4370. [PMID: 36514774 PMCID: PMC9731539 DOI: 10.1002/fsn3.3028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 07/15/2022] [Accepted: 07/27/2022] [Indexed: 12/16/2022] Open
Abstract
Arsenic (As) poisoning has caused an environmental catastrophe in Bangladesh as millions of people are exposed to As-contaminated drinking water. Chronic As-exposure causes depression, memory impairment, and liver injury in experimental animals. This study was carried out to assess the protective effect of mulberry leaves juice (Mul) against As-induced neurobehavioral and hepatic dysfunctions in Swiss albino mice. As-exposed mice spent significantly reduced time in open arms and increased time spent in closed arms in the elevated plus maze (EPM) test, whereas they took significantly longer time to find the hidden platform in the Morris water maze (MWM) test and spent significantly less time in the desired quadrant when compared to the control mice. A significant reduction in serum BChE activity, an indicator of As-induced neurotoxicity-associated behavioral changes, was noted in As-exposed mice compared to control mice. Supplementation of Mul to As-exposed mice significantly increased serum BChE activity, increased the time spent in open arms and reduced time latency to find the hidden platform, and stayed more time in the target quadrant in EPM and MWM tests, respectively, compared to As-exposed-only mice. Also, a significantly reduced activity of BChE, AChE, SOD, and GSH in brain, and elevated ALP, AST, and ALT activities in serum were noted in As-exposed mice when compared to control mice. Mul supplementation significantly restored the activity of these enzymes and also recovered As-induced alterations in hepatic tissue in As-exposed mice. In conclusion, this study suggested that mulberry leaves juice attenuates As-induced neurobehavioral and hepatic dysfunction in mice.
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Affiliation(s)
- Zohurul Islam
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
| | - Jahidul Islam
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
| | - Selim Reza Tony
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
| | - Adiba Anjum
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
- Department of Biochemistry and Molecular BiologyMawlana Bhashani Science and Technology UniversityTangailBangladesh
| | - Rafia Ferdous
- Department of PharmacyUniversity of RajshahiRajshahiBangladesh
| | - Apurba Kumar Roy
- Department of Genetic Engineering & BiotechnologyUniversity of RajshahiRajshahiBangladesh
| | - Shakhawoat Hossain
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
| | - Kazi Abdus Salam
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
| | - Farjana Nikkon
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
| | - Khaled Hossain
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
| | - Zahangir Alam Saud
- Department of Biochemistry and Molecular BiologyUniversity of RajshahiRajshahiBangladesh
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4
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Heroin Addiction Induces Axonal Transport Dysfunction in the Brain Detected by In Vivo MRI. Neurotox Res 2022; 40:1070-1085. [PMID: 35759084 DOI: 10.1007/s12640-022-00533-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 06/13/2022] [Accepted: 06/13/2022] [Indexed: 10/17/2022]
Abstract
Heroin is a highly addictive drug that causes axonal damage. Here, manganese-enhanced magnetic resonance imaging (MEMRI) was used to dynamically monitor axonal transport at different stages of heroin addiction. Rat models of heroin addiction (HA) and prolonged heroin addiction (PHA) were established by injecting rats with heroin at different stages. Heroin-induced learning and memory deficits were evaluated in the Morris water maze (MWM), and MEMRI was used to dynamically evaluate axonal transport in the olfactory pathway. The expression of proteins related to axonal structure and function was also assessed by Western blotting. Transmission electron microscopy (TEM) was used to observe ultrastructural changes, and protein levels of neurofilament heavy chain (NF-H) were analyzed by immunofluorescence staining. HA rats, especially PHA rats, exhibited worse spatial learning and memory than control rats. Compared with HA rats and control rats, PHA rats exhibited significantly longer escape latencies, significantly fewer platform-location crossings, and significantly more time in the target quadrant during the MWM test. Mn2+ transport was accelerated in HA rats. PHA rats exhibited severely reduced Mn2+ transport, and the axonal transport rate (ATR) was significantly lower in these rats than in control rats (P < 0.001). The levels of cytoplasmic dynein and kinesin-1 were significantly decreased in the PHA group than in the control group (P < 0.001); additionally, the levels of energy-related proteins, including cytochrome c oxidase (COX) IV and ATP synthase subunit beta (ATPB), were lower in the PHA group (P < 0.001). The brains of heroin-exposed rats displayed an abnormal ultrastructure, with neuronal apoptosis and mitochondrial dysfunction. Heroin exposure decreased the expression of NF-H, as indicated by significantly reduced staining intensities in tissues from HA and PHA rats (P < 0.05). MEMRI detected axonal transport dysfunction caused by long-term repeated exposure to heroin. The main causes of axonal transport impairment may be decreases in the levels of motor proteins and mitochondrial dysfunction. This study shows that MEMRI is a potential tool for visualizing axonal transport in individuals with drug addictions, providing a new way to evaluate addictive encephalopathy.
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Farhadi A, Totonchi M, Nabavi SM, Baharvand H, Pakdaman H, Hajizadeh-Saffar E, Mousavi SA, Hadi F, Al-Sinawi H, Li Q, Zhang JS, Tahamtani Y, Shahpasand K. P38 Initiates Degeneration of midbrain GABAergic and Glutamatergic Neurons in Diabetes Models. Eur J Neurosci 2022; 56:3755-3778. [PMID: 35513862 DOI: 10.1111/ejn.15686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 04/04/2022] [Accepted: 04/25/2022] [Indexed: 11/30/2022]
Abstract
Diabetes mellitus may cause tau protein hyperphosphorylation and neurodegeneration, but the exact mechanism by which diabetic conditions induce tau pathology remains unclear. Tau protein hyperphosphorylation is considered a major pathological hallmark of neurodegeneration and can be triggered by diabetes. Various tau-directed kinases, including P38, can be activated upon diabetic stress and induce tau hyperphosphorylation. Despite extensive research efforts the exact tau specie(s) and kinases driving neurodegeneration in diabetes mellitus have not been clearly elucidated. We herein employed different techniques to determine the exact molecular mechanism of tau pathology triggered by diabetes in in vivo and in vitro models. We showed that diabetes-related stresses and glucose metabolism deficiency could induce cis P-tau (an early driver of the tau pathology) accumulation in the midbrain and corpus callosum of the diabetic mice models and cells treated with 2-deoxy-D-glucose, respectively. We found that the active phosphorylated level of P38 was increased in the treated cells and diabetic mice models. We observed that oxidative stress activated P38, which directly and indirectly drove tau pathology in the GABAergic and Glutamatergic neurons of the midbrain of the diabetic mice after 96 hours, which accumulated in the other neighboring brain areas after two months. Notably, P38 inhibition suppressed tau pathogenicity and risk-taking behaviors in the animal models after 96 hours. The data establish P38 as a central mediator of diabetes mellitus induced tau pathology. Our findings provide mechanistic insight into the consequences of this metabolic disorder on the nervous system.
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Affiliation(s)
- Aisan Farhadi
- Department of Developmental Biology, Faculty of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, ACECR, Tehran, Iran.,Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Brain and Cognitive Sciences, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Mehdi Totonchi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Seyed Masood Nabavi
- Department of Brain and Cognitive Sciences, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hossein Baharvand
- Department of Developmental Biology, Faculty of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, ACECR, Tehran, Iran.,Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Brain and Cognitive Sciences, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hossein Pakdaman
- Brain Mapping Research Center, Department of Neurology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ensiyeh Hajizadeh-Saffar
- Department of Regenerative medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Seyed Ahmad Mousavi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Fatemeh Hadi
- Department of Brain and Cognitive Sciences, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hamed Al-Sinawi
- Department of Behavioral Medicine, Sultan Qaboos University Hospital, Muscat, Oman
| | - Quan Li
- Institute of Life Sciences, Wenzhou University, Wenzhou, Zhejiang, China
| | - Jin-San Zhang
- Institute of Life Sciences, Wenzhou University, Wenzhou, Zhejiang, China.,Division of Oncology Research, Mayo Clinic, Rochester, MN, USA
| | - Yaser Tahamtani
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Koorosh Shahpasand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Brain and Cognitive Sciences, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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6
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Cacciatore M, Grasso EA, Tripodi R, Chiarelli F. Impact of glucose metabolism on the developing brain. Front Endocrinol (Lausanne) 2022; 13:1047545. [PMID: 36619556 PMCID: PMC9816389 DOI: 10.3389/fendo.2022.1047545] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
Glucose is the most important substrate for proper brain functioning and development, with an increased glucose consumption in relation to the need of creating new brain structures and connections. Therefore, alterations in glucose homeostasis will inevitably be associated with changes in the development of the Nervous System. Several studies demonstrated how the alteration of glucose homeostasis - both hyper and hypoglycemia- may interfere with the development of brain structures and cognitivity, including deficits in intelligence quotient, anomalies in learning and memory, as well as differences in the executive functions. Importantly, differences in brain structure and functionality were found after a single episode of diabetic ketoacidosis suggesting the importance of glycemic control and stressing the need of screening programs for type 1 diabetes to protect children from this dramatic condition. The exciting progresses of the neuroimaging techniques such as diffusion tensor imaging, has helped to improve the understanding of the effects, outcomes and mechanisms underlying brain changes following dysglycemia, and will lead to more insights on the physio-pathological mechanisms and related neurological consequences about hyper and hypoglycemia.
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7
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Bhusal A, Rahman MH, Suk K. Hypothalamic inflammation in metabolic disorders and aging. Cell Mol Life Sci 2021; 79:32. [PMID: 34910246 PMCID: PMC11071926 DOI: 10.1007/s00018-021-04019-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/01/2021] [Accepted: 10/29/2021] [Indexed: 12/15/2022]
Abstract
The hypothalamus is a critical brain region for the regulation of energy homeostasis. Over the years, studies on energy metabolism primarily focused on the neuronal component of the hypothalamus. Studies have recently uncovered the vital role of glial cells as an additional player in energy balance regulation. However, their inflammatory activation under metabolic stress condition contributes to various metabolic diseases. The recruitment of monocytes and macrophages in the hypothalamus helps sustain such inflammation and worsens the disease state. Neurons were found to actively participate in hypothalamic inflammatory response by transmitting signals to the surrounding non-neuronal cells. This activation of different cell types in the hypothalamus leads to chronic, low-grade inflammation, impairing energy balance and contributing to defective feeding habits, thermogenesis, and insulin and leptin signaling, eventually leading to metabolic disorders (i.e., diabetes, obesity, and hypertension). The hypothalamus is also responsible for the causation of systemic aging under metabolic stress. A better understanding of the multiple factors contributing to hypothalamic inflammation, the role of the different hypothalamic cells, and their crosstalks may help identify new therapeutic targets. In this review, we focus on the role of glial cells in establishing a cause-effect relationship between hypothalamic inflammation and the development of metabolic diseases. We also cover the role of other cell types and discuss the possibilities and challenges of targeting hypothalamic inflammation as a valid therapeutic approach.
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Affiliation(s)
- Anup Bhusal
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea
- BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea
| | - Md Habibur Rahman
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea
- Division of Endocrinology, Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, 08901, USA
| | - Kyoungho Suk
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea.
- BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea.
- Brain Science and Engineering Institute, Kyungpook National University, Daegu, 41944, Republic of Korea.
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Gong L, Xie J, Liu J, Tang G, Lin W, Zhang Z. Olfactory dysfunction is a risk factor for the comorbidity of mild cognitive impairment and Type 2 diabetes mellitus. ZHONG NAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF CENTRAL SOUTH UNIVERSITY. MEDICAL SCIENCES 2021; 46:831-837. [PMID: 34565726 PMCID: PMC10929969 DOI: 10.11817/j.issn.1672-7347.2021.200046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Indexed: 11/03/2022]
Abstract
OBJECTIVES Diabetes can accelerate cognitive decline and hence affect the prognosis of patients with Type 2 diabetes mellitus (T2DM). Olfactory assessment can facilitate the early identification of cognitive impairment among T2DM patients. This study aims to evaluate the effects of olfactory function on mild cognitive impairment (MCI) in patients with T2DM. METHODS A total of 472 T2DM patients who were hospitalized in a first-class hospital in Changsha City from June 2018 to June 2019 were enrolled for this study. Olfactory function and cognitive function were assessed by the alcohol sniff test and the Montreal Cognitive Assessment (MoCA) scale, respectively. Participants were categorized into a comorbidity of MCI and T2DM group and a T2DM group. General information was collected and some biochemical indices were tested. Difference in the alcohol sniff test score between the 2 groups was assessed by 2-sample t-test. Difference in the presence of olfactory dysfunction between the 2 groups was assessed by χ2 test, and multivariable logistic regression was used to determine the relevant factors contributing to the comorbidity of MCI and T2DM. RESULTS Of the 472 participants, 162 were identified with MCI, making the comorbidity rate at 34.3%. Values of isopropyl alcohol sniff test were significantly different between the 2 groups [(9.15±3.22) cm vs (21.03±4.36) cm, P<0.05]. The number of patients with olfactory dysfunction also differed significantly between the 2 groups (120 vs 50). After adjustment for age, educational level, T2DM duration, fasting insulin, and glycosylated hemoglobin (HbA1c), multivariate logistic regression analysis showed older age (OR=1.14, 95% CI 1.09 to 1.20), longer course of diabetes (OR=1.21, 95% CI 1.12 to 1.31), and olfactory-impaired (OR=4.61, 95% CI 3.04 to 6.18) were independent risk factors for T2DM combined with MCI, and the high education level (OR=0.26, 95% CI 0.15 to 0.38) was an independent protective factor for T2DM combined with MCI. CONCLUSIONS Olfactory dysfunction is an independent risk factor for the comorbidity of MCI and T2DM. Special attention should be paid to those with olfactory dysfunction when carrying out cognitive interventions in T2DM patients.
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Affiliation(s)
- Lina Gong
- Intensive Care Unit, Department of Neurology, Third Xiangya Hospital, Central South University, Changsha 410013.
| | - Jianfei Xie
- Department of Nursing, Third Xiangya Hospital, Central South University, Changsha 410013
| | - Jia Liu
- Department of Transplantation, Third Xiangya Hospital, Central South University, Changsha 410013
| | - Guanxiu Tang
- Department of Gerontology, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Wanli Lin
- Intensive Care Unit, Department of Neurology, Third Xiangya Hospital, Central South University, Changsha 410013.
| | - Zhen Zhang
- Intensive Care Unit, Department of Neurology, Third Xiangya Hospital, Central South University, Changsha 410013
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9
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Wu C, Xu K, Liu W, Liu A, Liang H, Li Q, Feng Z, Yang Y, Ding J, Zhang T, Liu Y, Liu X, Zuo Z. Protective Effect of Raf-1 Kinase Inhibitory Protein on Diabetic Retinal Neurodegeneration through P38-MAPK Pathway. Curr Eye Res 2021; 47:135-142. [PMID: 34133251 DOI: 10.1080/02713683.2021.1944644] [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] [Indexed: 10/21/2022]
Abstract
PURPOSE This study aimed to investigate the effect of Raf-1 kinase inhibitory protein (RKIP) on diabetic retinal neurodegeneration in streptozotocin-treated rat model and high glucose-treated rat Müller cells. METHODS Control and streptozotocin-treated rats were intravitreally injected with saline, RKIP gene overexpression lentivirus (oeRKIP) or negative control lentivirus (RKIP-vector). Normal or high glucose-treated Müller cells were transfected with saline, RKIP gene overexpression lentivirus or negative control lentivirus. Western blotting and immunofluorescence assay were utilized to evaluate the function of RKIP on the expression of RKIP, p38 mitogen-activated protein kinase (p38-MAPK), glutamate/aspartate transporter (GLAST), glutamine synthetase (GS), glial fibrillar acidic protein (GFAP) and cysteine-aspartic acid protease-3 (caspase-3). A glutamate assay kit was adopted to detect glutamate level in retina samples. Apoptosis of Müller cells was determined by Annexin-V/PI staining and flow cytometry. RESULTS High glucose-treated Müller cells exhibited promoted apoptosis, while RKIP overexpression in high glucose-treated Müller cells down-regulated the enhanced apoptosis. Compared with rats injected with saline, streptozotocin-treated hyperglycemic rats displayed enhancement in the immunoreactivities of p38-MAPK and GFAP as well as in the protein expression of p38-MAPK and caspase-3. Strikingly, intravitreal injection of RKIP gene overexpression lentivirus in the hyperglycemic rats reversed the augmented immunoreactivities and protein expression mentioned above. Meanwhile, RKIP overexpression in the hyperglycemic rats improved the immunoreactivities and protein expression of RKIP, GS and GLAST. Besides, RKIP down-regulated the increased level of retinal glutamate in the hyperglycemic rats. CONCLUSIONS Intravitreal injection of RKIP gene overexpression lentivirus functioned in preventing diabetic retinal neurodegeneration in a rat model of diabetes presumably by inhibiting p38-MAPK pathway.
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Affiliation(s)
- Chuanling Wu
- Teaching and Research Section of Basic Medicine, Jianhu College, Zhejiang Industry Polytechnic College, Shaoxing, Zhejiang, China.,Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Kai Xu
- Department of Hepatopancreatobiliary Surgery, Qinghai University Affiliated Hospital, Xining, Qinghai, China
| | - Wenqiang Liu
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China
| | - Anqi Liu
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China
| | - Huimin Liang
- Department of Fundus Disease, Shandong Lunan Eye Hospital, Linyi, Shangdong, China
| | - Qunwang Li
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China
| | - Zhen Feng
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China
| | - Yang Yang
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China
| | - Jiayuan Ding
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China
| | - Tianyi Zhang
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China
| | - Yingxue Liu
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China
| | - Xuezheng Liu
- Department of Anatomy, Histology and Embryology, Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou, Liaoning, China.,Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Zhongfu Zuo
- Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, Liaoning, China.,Department of Anatomy, Histology and Embryology, Postdoctoral Research Station, Guangxi Medical University, Nanning, Guangxi, China
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10
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Sanke H, Mita T, Yoshii H, Someya Y, Yamashiro K, Shimizu T, Ohmura C, Onuma T, Watada H. Olfactory dysfunction predicts the development of dementia in older patients with type 2 diabetes. Diabetes Res Clin Pract 2021; 174:108740. [PMID: 33711397 DOI: 10.1016/j.diabres.2021.108740] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 02/23/2021] [Accepted: 03/01/2021] [Indexed: 01/21/2023]
Abstract
AIMS Olfactory dysfunction is associated with the transition from normal cognition to dementia in persons without type 2 diabetes. This study aimed to investigate whether olfactory dysfunction could be an early marker of future dementia in older patients with type 2 diabetes. METHODS This exploratory study included 151 older Japanese outpatients with type 2 diabetes who did not have a diagnosis of probable dementia at baseline. A multivariate logistic regression model was used to determine whether Open Essence (OE) test score at baseline is associated with the development of probable dementia. RESULTS Over 3 years, approximately 9% of the study subjects developed probable dementia. Subjects with olfactory dysfunction at baseline developed probable dementia more frequently than those without. Multivariate logistic regression showed that lower OE test score, higher age, lower Mini-Mental State Examination (MMSE) score, higher total protein concentration, and more frequent use of a sulfonylurea are significantly associated with the development of probable dementia. Stepwise multivariate regression analysis demonstrated that change in OE test score over 3 years is significantly associated with change in MMSE score. CONCLUSIONS Our study suggested that olfactory dysfunction precedes the development of probable dementia in older patients with type 2 diabetes.
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Affiliation(s)
- Haruna Sanke
- Department of Metabolism & Endocrinology, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Tomoya Mita
- Department of Metabolism & Endocrinology, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Center for Therapeutic Innovations in Diabetes, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan.
| | - Hidenori Yoshii
- Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center, Shinsuna 3-3-20, Koto-ku, Tokyo 136-0075, Japan
| | - Yuki Someya
- Department of Metabolism & Endocrinology, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Sportology Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Keiko Yamashiro
- Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center, Shinsuna 3-3-20, Koto-ku, Tokyo 136-0075, Japan
| | - Tomoaki Shimizu
- Department of Metabolism & Endocrinology, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Chie Ohmura
- Department of Metabolism & Endocrinology, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Tomio Onuma
- Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center, Shinsuna 3-3-20, Koto-ku, Tokyo 136-0075, Japan
| | - Hirotaka Watada
- Department of Metabolism & Endocrinology, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Center for Therapeutic Innovations in Diabetes, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Center for Molecular Diabetology, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Sportology Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
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11
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Diabetes Mellitus-Related Dysfunction of the Motor System. Int J Mol Sci 2020; 21:ijms21207485. [PMID: 33050583 PMCID: PMC7589125 DOI: 10.3390/ijms21207485] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/08/2020] [Accepted: 10/08/2020] [Indexed: 12/20/2022] Open
Abstract
Although motor deficits in humans with diabetic neuropathy have been extensively researched, its effect on the motor system is thought to be lesser than that on the sensory system. Therefore, motor deficits are considered to be only due to sensory and muscle impairment. However, recent clinical and experimental studies have revealed that the brain and spinal cord, which are involved in the motor control of voluntary movement, are also affected by diabetes. This review focuses on the most important systems for voluntary motor control, mainly the cortico-muscular pathways, such as corticospinal tract and spinal motor neuron abnormalities. Specifically, axonal damage characterized by the proximodistal phenotype occurs in the corticospinal tract and motor neurons with long axons, and the transmission of motor commands from the brain to the muscles is impaired. These findings provide a new perspective to explain motor deficits in humans with diabetes. Finally, pharmacological and non-pharmacological treatment strategies for these disorders are presented.
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12
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Rasouli H, Yarani R, Pociot F, Popović-Djordjević J. Anti-diabetic potential of plant alkaloids: Revisiting current findings and future perspectives. Pharmacol Res 2020; 155:104723. [PMID: 32105756 DOI: 10.1016/j.phrs.2020.104723] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 01/07/2020] [Accepted: 02/23/2020] [Indexed: 02/07/2023]
Abstract
Diabetes mellitus (DM) is a chronic metabolic disease which causes millions of death all over the world each year, and its incidence is on increase. The most prevalent form, type 2 DM, is characterized by insulin resistance and β-cell dysfunction, whereas type 1 DM is due to insulin deficiency as a result of β-cell destruction. Various classes of synthetic drugs have been developed to regulate glucose homeostasis and combat the development of late-diabetic complications. However, several of these chemical agents are either sub-optimal in their effect and/or may have side effects. Biologically, alkaloids unveiled a wide range of therapeutic effects including anti-diabetic properties. The chemical backbones of these compounds have the potential to interact with a wide range of proteins involved in glucose homeostasis, and thus they have received increasing attention as reliable candidates for drug development. This review sets out to investigate the anti-diabetic potential of plant alkaloids (PAs), and therefore, scientific databases were comprehensively screened to highlight the biological activity of 78 PAs with a considerable anti-diabetic profile. There are not enough clinical data available for these phytochemicals to follow their fingerprint in human, but current studies generally recommending PAs as potent α-glucosidase inhibitors. Except for some classes of monoterpene alkaloids, other compounds showed similar features as well as the presently available anti-diabetic drugs such as amino sugars and other relevant drugs. Moreover, the evidence suggests that PAs have the potential to be used as alternative additives for the treatment of DM, however, further in vitro and in vivo studies are needed to validate these findings.
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Affiliation(s)
- Hassan Rasouli
- Medical Biology Research Center (MBRC), Kermanshah University of Medical Science, Kermanshah, Iran; Department of Agricultural Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Reza Yarani
- T1D Biology, Department of Clinical Research, Steno Diabetes Center Copenhagen, Denmark
| | - Flemming Pociot
- T1D Biology, Department of Clinical Research, Steno Diabetes Center Copenhagen, Denmark; Copenhagen Diabetes Research Center, Department of Pediatrics, Herlev University Hospital, Herlev Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Jelena Popović-Djordjević
- University of Belgrade, Faculty of Agriculture, Department of Food Technology and Biochemistry, 11080 Belgrade, Serbia
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13
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Kumar M, Chail M. Sucrose and saccharin differentially modulate depression and anxiety-like behavior in diabetic mice: exposures and withdrawal effects. Psychopharmacology (Berl) 2019; 236:3095-3110. [PMID: 31073738 DOI: 10.1007/s00213-019-05259-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 04/26/2019] [Indexed: 01/08/2023]
Abstract
RATIONALE Sugar has addictive potential owing to increase in monoaminergic-transmission at pleasure and reward centers of brain. Insulin dysfunction triggered synaptic monoamine deficit is associated with sugar overeating and craving-related psychological changes in diabetic patients. Sugar-substitute (saccharin) is non-caloric artificial sweetener that may alleviate brain disorders in diabetes. OBJECTIVES In present study, effects of sucrose and sugar-substitute (saccharin) exposures and withdrawal on depression and anxiety-like behavior in type 2 diabetic mice were assessed. METHODS Swiss albino mice were injected with streptozotocin (135 mg/kg). After induction of diabetes, mice were exposed to a two-bottle water-water, 10% sucrose-water, or 10% saccharin-water choice paradigm for 28 days. Separate groups were employed to assess withdrawal effect of sucrose or saccharin in diabetic mice. Monoamine oxidase (MAO), corticosterone, thiobarbituric acid reactive substances (TBARS), and reduced glutathione (GSH) were quantified after behavioral tests. RESULTS Diabetic mice manifested preference towards 10% sucrose or saccharin over water. Sucrose-overeating by diabetic mice amplified symptoms of depression and anxiety; however, withdrawal further exaggerated these behavioral abnormalities. Substitution of sucrose by 10% saccharin attenuated the depressive and anxiety-like behavior in comparison to diabetic mice that were exposed separately to water-water or sucrose-water alone, and with respect to normal mice. Although withdrawal from saccharin resurfaced behavioral anomalies in diabetic mice, however, these were significantly low in comparison with withdrawal from sucrose or normal group. Reinstatement of exposure to saccharin mitigated symptoms of depression and anxiety in diabetic mice. CONCLUSION Preference of sucrose overeating augments while saccharin mitigates depressive and anxiety behavior during diabetes.
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Affiliation(s)
- Manish Kumar
- Department of Pharmacology, Swift School of Pharmacy, Ghaggar Sarai, Rajpura, Punjab, 140401, India.
| | - Monica Chail
- Department of Pharmacology, Swift School of Pharmacy, Ghaggar Sarai, Rajpura, Punjab, 140401, India
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14
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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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15
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Kamel SR, Sadek HA, Hamed A, Sayed OA, Mahmud MH, Mohamed FA, El Sagher GM, Aly LH. Ultrasound-guided insulin injection for carpal tunnel syndrome in type 2 diabetes mellitus patients. Clin Rheumatol 2019; 38:2933-2940. [PMID: 31209710 DOI: 10.1007/s10067-019-04638-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/23/2019] [Accepted: 06/04/2019] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To compare effectiveness of ultrasound-guided local insulin injection, local steroid injection, and local steroid followed by insulin injections in treating mild to moderate carpal tunnel syndrome (CTS) in type 2 diabetes mellitus (DM). METHOD Study included 60 patients with electrophysiologic evidence of mild to moderate CTS. They were randomly divided into three groups: group I received insulin injection locally into the affected carpal tunnel at first visit and a similar dose after 2 weeks; group II received single injection of 40 mg methylprednisolone acetate injection; and group III received steroid injection then followed by insulin injection twice after 2 and 4 weeks. All injections were performed with ultrasonographic guidance. All patients were assessed by modified Boston Carpal Tunnel Questionnaire (FD score), CTS severity score (SS score), and neurophysiological and ultrasonographic assessments at baseline and 10 weeks after treatment. RESULTS A significant improvement in mean FD score, SS score, DML (distal motor latency), SNCV (sensory nerve conduction velocity), PSL (peak sensory latency), Samp (sensory amplitude), and CSA (cross-sectional area of median nerve) observed in all groups (with exception of mean DML and Samp in the second group and mean Samp in the third group). Group III showed significant improvement in CSA especially when compared to group II by post hoc analysis (P = 0.005). CONCLUSIONS Local insulin injection is as effective as steroid in treating mild to moderate CTS in type 2 DM and is a safer alternative. Adding insulin injections after steroid shows more sonographic improvement than steroid alone. Key Points • Local insulin injection is as effective as steroid in treating mild to moderate CTS in type 2 diabetic patients. • Measuring CSA of median nerve at CT inlet by US is a better tool for monitoring median nerve changes after treatment. • Adding insulin injections after steroid has more sonographic improvement than steroid alone.
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Affiliation(s)
- Shereen Refaat Kamel
- Rheumatology and Rehabilitation Department, Faculty of Medicine, Minia University, Minia, Egypt.
| | - Hanaa A Sadek
- Rheumatology and Rehabilitation Department, Faculty of Medicine, Minia University, Minia, Egypt
| | - Ahmed Hamed
- Rheumatology and Rehabilitation Department, Faculty of Medicine, Minia University, Minia, Egypt
| | - Omima A Sayed
- Rheumatology and Rehabilitation Department, Faculty of Medicine, Minia University, Minia, Egypt
| | - Mona H Mahmud
- Rheumatology and Rehabilitation Department, Faculty of Medicine, Minia University, Minia, Egypt
| | - Fatma A Mohamed
- Rheumatology and Rehabilitation Department, Faculty of Medicine, Minia University, Minia, Egypt
| | - Ghada M El Sagher
- Internal Medicine Department, Faculty of Medicine, Minia University, Minia, Egypt
| | - Lamia H Aly
- Clinical Pathology Department, Faculty of Medicine, Minia University, Minia, Egypt
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16
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Metformin Regulates the Expression of SK2 and SK3 in the Atria of Rats With Type 2 Diabetes Mellitus Through the NOX4/p38MAPK Signaling Pathway. J Cardiovasc Pharmacol 2019; 72:205-213. [PMID: 30188871 DOI: 10.1097/fjc.0000000000000615] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We previously found that metformin regulates the ion current conducted by the small conductance calcium-activated potassium channels (SK channels) in the atria of rats with type 2 diabetes mellitus (T2DM) as well as the mRNA and protein expression of the SK2 and SK3 subtypes of SK channels. In this study, we hypothesized that the nicotinamide adenine dinucleotide phosphate oxidase 4 (NOX4)/p38 mitogen-activated protein kinase (p38MAPK) signaling pathway was involved in the metformin-mediated regulation of SK2 and SK3 expression in the atria of rats with T2DM. We randomly divided Wistar rats into the control group, the untreated T2DM group, the metformin-treated group, the group receiving subcutaneous injections of the nicotinamide adenine dinucleotide phosphate oxidase (NOX) inhibitor diphenyleneiodonium (DPI), and the group receiving tail vein injections of the p38MAPK agonist anisomycin. Real-time polymerase chain reaction, Western blot, and immunohistochemistry were applied to examine the expression levels of SK2, SK3, NOX4, and phospho-p38MAPK (p-p38MAPK) mRNAs and proteins in the atrial tissue of relevant groups. We observed that the expression levels of NOX4 mRNA and protein and p-p38MAPK protein were significantly elevated in the atria of rats with T2DM compared with the control group. In addition, SK2 protein expression was reduced, whereas SK3 protein expression was increased. The 8-week treatment with metformin markedly reduced the expression levels of NOX4 mRNA and protein and p-p38MAPK protein, upregulated the SK2 expression, and downregulated the SK3 expression. Tail vein injection with anisomycin significantly increased the p-p38MAPK expression while further inhibiting the expression of SK2 and enhancing the expression of SK3. Subcutaneous injection with DPI considerably inhibited the expression of NOX4, further enhanced the expression of SK2 and suppressed the expression of SK3. In addition, subcutaneous injection with DPI significantly suppressed the phosphorylation of p38MAPK. In conclusion, the NOX4/p38MAPK signaling pathway mediates the downregulation of SK2 and the upregulation of SK3 in the atria of rats with T2DM. Long-term metformin treatment upregulates SK2 protein expression and downregulates SK3 protein expression by inhibiting the NOX4/p38MAPK signaling pathway.
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17
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Sarkar R, Ghosh P, Tripathy A, Ghosh D. Correction of diabetes-induced testicular dysfunction by a hydro-methanol (60:40) extract of Curcuma amada rhizomes: A dose-dependent study. J Food Biochem 2019; 43:e12829. [PMID: 31353516 DOI: 10.1111/jfbc.12829] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/25/2019] [Accepted: 02/14/2019] [Indexed: 11/28/2022]
Abstract
Diabetes affects the reproductive system. This study was conducted to find out the potent dose of the hydro-methanol 60:40 extract of Curcuma amada rhizomes for the management of diabetes-induced testicular dysfunction in albino rats. The extract was administered at the doses of 10, 20, 40, and 80 mg/100 g body weight/day for 28 days. Oxidative stresses, reproductive parameters, histological, and gene expressions of the testicular tissue were assessed. Out of the doses used, the 20-mg dose showed maximum recovery as the minimum dose (e.g., sperm motility 112.03%, testicular cholesterol 34.86%, Bax gene expression 49.77%), whereas 40- and 80-mg doses did not vary statistically with each other (e.g., sperm motility 95.37% and 89.19%, testicular cholesterol 30.42% and 28.41%, Bax gene expression 47.33% and 46.18%, respectively) as well as with the 20-mg dose. It may be concluded that the 20-mg dose is the threshold dose for this purpose. PRACTICAL APPLICATIONS: The hydro-methanol 60:40 extract of rhizomes of Curcuma amada has a strong antioxidant property that can manage diabetes-induced oxidative injuries in testes which may raise a hope to the pharmaceutical industries to develop a herbal drug for diabetes-linked testicular hypofunction management.
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Affiliation(s)
- Riya Sarkar
- Molecular Medicine and Nutrigenomics Research Laboratory, Department of Bio-Medical Laboratory Science and Management, Vidyasagar University, Midnapore, India
| | - Prabal Ghosh
- Molecular Medicine and Nutrigenomics Research Laboratory, Department of Bio-Medical Laboratory Science and Management, Vidyasagar University, Midnapore, India
| | - Adrija Tripathy
- Molecular Medicine and Nutrigenomics Research Laboratory, Department of Bio-Medical Laboratory Science and Management, Vidyasagar University, Midnapore, India
| | - Debidas Ghosh
- Molecular Medicine and Nutrigenomics Research Laboratory, Department of Bio-Medical Laboratory Science and Management, Vidyasagar University, Midnapore, India
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18
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Sriraksa N, Kongsui R, Thongrong S, Duangjai A, Hawiset T. Effect of Azadirachta indica flower extract on functional recovery of sciatic nerve crush injury in rat models of DM. Exp Ther Med 2019; 17:541-550. [PMID: 30651834 DOI: 10.3892/etm.2018.6931] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 10/26/2018] [Indexed: 01/29/2023] Open
Abstract
Chronic hyperglycemia causes nerves to be more susceptible to compression, which often occurs as a result of hyperglycemia-induced oxidative stress. Oxidative stress impairs nerve function and delays nerve recovery. Azadirachta indica, a herb from Thailand, possesses antioxidant and antidiabetic properties. The aim of the present study was therefore to investigate the effect of A. indica flower extract on the functional recovery of a sciatic nerve crush injury in rat models of diabetes mellitus (DM). Male Wistar rats were randomly assigned into seven groups including the control rats, rats with DM subjected to sham surgery and treated with vehicle, and rats with DM subjected to the crush surgery and treated with vehicle or A. indica flower extract at a dose of 250, 500 or 750 mg/kg animal body weight, or with vitamin C. DM was induced using a single intraperitoneal injection of streptozotocin (55 mg/kg animal body weight). Rats subjected to a sciatic nerve crush injury or sham surgery were orally treated with either vehicle, A. indica flower extract or vitamin C for 21 days. Functional recovery was assessed every 3 days using a walking track analysis, foot withdrawal reflex test and rotarod test. At the end of the study, the rats were sacrificed and their left sciatic nerves were harvested in order to determine malondialdehyde levels, superoxide dismutase activity and axon density. The treatment with A. indica flower extract significantly improved functional recovery, especially motor and sensory functions. The extract significantly decreased malondialdehyde levels, and increased superoxide dismutase activity and axon density. The results of the current study indicate that the mechanism underlying the enhanced functional recovery of the sciatic nerve following treatment with A. indica flower extract may be associated with an antioxidative effect. However, further studies are required to confirm the current results.
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Affiliation(s)
- Napatr Sriraksa
- Division of Physiology, School of Medical Sciences, University of Phayao, Mueang, Phayao 56000, Thailand
| | - Ratchaniporn Kongsui
- Division of Physiology, School of Medical Sciences, University of Phayao, Mueang, Phayao 56000, Thailand
| | - Sitthisak Thongrong
- Division of Anatomy, School of Medical Sciences, University of Phayao, Mueang, Phayao 56000, Thailand
| | - Acharaporn Duangjai
- Division of Physiology, School of Medical Sciences, University of Phayao, Mueang, Phayao 56000, Thailand
| | - Thaneeya Hawiset
- School of Medicine, Mae Fah Luang University, Mueang, Chiang Rai 57100, Thailand
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19
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Cloyd RA, Koren SA, Abisambra JF. Manganese-Enhanced Magnetic Resonance Imaging: Overview and Central Nervous System Applications With a Focus on Neurodegeneration. Front Aging Neurosci 2018; 10:403. [PMID: 30618710 PMCID: PMC6300587 DOI: 10.3389/fnagi.2018.00403] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Accepted: 11/23/2018] [Indexed: 12/16/2022] Open
Abstract
Manganese-enhanced magnetic resonance imaging (MEMRI) rose to prominence in the 1990s as a sensitive approach to high contrast imaging. Following the discovery of manganese conductance through calcium-permeable channels, MEMRI applications expanded to include functional imaging in the central nervous system (CNS) and other body systems. MEMRI has since been employed in the investigation of physiology in many animal models and in humans. Here, we review historical perspectives that follow the evolution of applied MRI research into MEMRI with particular focus on its potential toxicity. Furthermore, we discuss the more current in vivo investigative uses of MEMRI in CNS investigations and the brief but decorated clinical usage of chelated manganese compound mangafodipir in humans.
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Affiliation(s)
- Ryan A Cloyd
- Department of Physiology, University of Kentucky, Lexington, KY, United States.,College of Medicine, University of Kentucky, Lexington, KY, United States.,Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, United States
| | - Shon A Koren
- Department of Physiology, University of Kentucky, Lexington, KY, United States.,Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, United States.,Department of Neuroscience & Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, United States
| | - Jose F Abisambra
- Department of Physiology, University of Kentucky, Lexington, KY, United States.,Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, United States.,Department of Neuroscience & Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL, United States.,Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, KY, United States
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20
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Wanrooy BJ, Kumar KP, Wen SW, Qin CX, Ritchie RH, Wong CHY. Distinct contributions of hyperglycemia and high-fat feeding in metabolic syndrome-induced neuroinflammation. J Neuroinflammation 2018; 15:293. [PMID: 30348168 PMCID: PMC6198529 DOI: 10.1186/s12974-018-1329-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 10/09/2018] [Indexed: 01/04/2023] Open
Abstract
Background High-fat feeding and hyperglycemia, key risk factors for the development of metabolic syndrome (MetS), are emerging to associate with increased risk of developing dementia and cognitive decline. Despite this, clinical and experimental studies have yet to elucidate the specific contributions of either high-fat feeding or hyperglycemia to potential neuroinflammatory components. In this study, we delineate these individual components of MetS in the development of neuroinflammation. Methods Male C57Bl/6 J adult mice were treated with either citrate vehicle (CIT) or streptozotocin (STZ; 55 mg/kg) 3, 5 and 7 days before commencement of either a normal or high-fat diet for 9 or 18 weeks. By creating separate models of high-fat feeding, STZ-induced hyperglycemia, as well as in combination, we were able to delineate the specific effects of a high-fat diet and hyperglycemia on the brain. Throughout the feeding regime, we measured the animals’ body weight and fasting blood glucose levels. At the experimental endpoint, we assessed plasma levels of insulin, glycated haemoglobin and performed glucose tolerance testing. In addition, we examined the effect of high fat-feeding and hyperglycemia on the levels of systemic inflammatory cytokines, gliosis in the hippocampus and immune infiltration in cerebral hemispheric tissue. Furthermore, we used intravital multiphoton microscopy to assess leukocyte-endothelial cell interactions in the cerebral vasculature of mice in vivo. Results We showed that acute hyperglycemia induces regional-specific effects on the brain by elevating microglial numbers and promotes astrocytosis in the hippocampus. In addition, we demonstrated that chronic hyperglycemia supported the recruitment of peripheral GR1+ granulocytes to the cerebral microvasculature in vivo. Moreover, we provided evidence that these changes were independent of the systemic inflammation associated with high-fat feeding. Conclusions Hyperglycemia alone preferentially induces microglial numbers and astrocytosis in the hippocampus and is associated with the peripheral recruitment of leukocytes to the cerebrovasculature, but not systemic inflammation. High-fat feeding alone, and in combination with hyperglycemia, increases the systemic pro-inflammatory cytokine milieu but does not result in brain-specific immune gliosis. These results shed light on the specific contributions of high-fat feeding and hyperglycemia as key factors of MetS in the development of neuroinflammation. Electronic supplementary material The online version of this article (10.1186/s12974-018-1329-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Brooke J Wanrooy
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash Medical Centre, Monash University, Clayton, VIC, 3168, Australia
| | - Kathryn Prame Kumar
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash Medical Centre, Monash University, Clayton, VIC, 3168, Australia
| | - Shu Wen Wen
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash Medical Centre, Monash University, Clayton, VIC, 3168, Australia
| | - Cheng Xue Qin
- Baker Heart and Diabetes Institute, Melbourne, Australia
| | - Rebecca H Ritchie
- Baker Heart and Diabetes Institute, Melbourne, Australia.,Department of Diabetes, Monash University, Melbourne, Australia
| | - Connie H Y Wong
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences at Monash Health, Monash Medical Centre, Monash University, Clayton, VIC, 3168, Australia.
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21
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Okuyama S, Nakashima T, Nakamura K, Shinoka W, Kotani M, Sawamoto A, Nakajima M, Furukawa Y. Inhibitory Effects of Auraptene and Naringin on Astroglial Activation, Tau Hyperphosphorylation, and Suppression of Neurogenesis in the Hippocampus of Streptozotocin-Induced Hyperglycemic Mice. Antioxidants (Basel) 2018; 7:antiox7080109. [PMID: 30126250 PMCID: PMC6115810 DOI: 10.3390/antiox7080109] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/10/2018] [Accepted: 08/17/2018] [Indexed: 01/08/2023] Open
Abstract
Auraptene, a citrus-related compound, exerts anti-inflammatory effects in peripheral tissues, and we demonstrated these effects in the brains of a lipopolysaccharide-injected systemic inflammation animal model and a brain ischemic mouse model. Naringin, another citrus-related compound, has been shown to exert antioxidant effects in several animal models. Hyperglycemia induces oxidative stress and inflammation and causes extensive damage in the brain; therefore, we herein evaluated the anti-inflammatory and other effects of auraptene and naringin in streptozotocin-induced hyperglycemic mice. Both compounds inhibited astroglial activation and the hyperphosphorylation of tau at 231 of threonine in neurons, and also recovered the suppression of neurogenesis in the dentate gyrus of the hippocampus in hyperglycemic mice. These results suggested that auraptene and naringin have potential effects as neuroprotective agents in the brain.
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Affiliation(s)
- Satoshi Okuyama
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Tatsumi Nakashima
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Kumi Nakamura
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Wakana Shinoka
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Maho Kotani
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Atsushi Sawamoto
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Mitsunari Nakajima
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
| | - Yoshiko Furukawa
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan.
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22
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Chiu CD, Chiu YP, Lin CL, Ji HR, Shen CC, Lee HT, Chang C. Acetazolamide alleviates sequelae of hyperglycaemic intracerebral haemorrhage by suppressing astrocytic reactive oxygen species. Free Radic Res 2018; 52:1010-1019. [PMID: 30079794 DOI: 10.1080/10715762.2018.1508838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Hyperglycaemia is associated with the poor outcome after intracerebral haemorrhage (ICH). Acetazolamide (AZA), a kind of carbonic anhydrogenase (CA) inhibitor, its effectiveness in ICH had been reported. However, the connections between AZA and ICH, especially in hyperglycaemia condition had never been defined. In this study, adult Sprague-Dawley rats were administered with vehicle or streptozotocin (STZ) to render them into normoglycaemic (NG) or hyperglycaemic (HG), respectively. Collagenase was then injected into the striatum. The NG or HG ICH rats treated with vehicle control or 5 mg/kg AZA (oral gavage) underwent haemorrhagic area assessments on the 1st, 4th, and 7th day after ICH. The coverage of pericytes was examined by immunohistochemistry. Reactive oxygen species (ROS) levels were assessed in mouse astrocyte cell line treated with vehicle or 20 μmol/L of AZA in culture media according to two different glucose concentrations. AZA reduced the haematoma size, improved neurobehavioral functions, suppressed astrocytic ROS production in vitro, and preserved cerebral pericytes coverage, which are even more remarkable in HG conditions. The present study indicates that AZA may alleviate some sequelae after ICH, especially in poorer prognostic HG rats through the suppression of astrocytic ROS production.
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Affiliation(s)
- Cheng-Di Chiu
- a School of Medicine , China Medical University , Taichung , Taiwan.,b Graduate Institute of Biomedical Science , China Medical University , Taichung , Taiwan.,c Department of Neurosurgery , China Medical University Hospital , Taichung , Taiwan.,d Stroke Center , China Medical University Hospital , Taichung , Taiwan
| | - You-Pen Chiu
- a School of Medicine , China Medical University , Taichung , Taiwan.,d Stroke Center , China Medical University Hospital , Taichung , Taiwan
| | - Cheng-Li Lin
- a School of Medicine , China Medical University , Taichung , Taiwan
| | - Hui-Ru Ji
- b Graduate Institute of Biomedical Science , China Medical University , Taichung , Taiwan.,d Stroke Center , China Medical University Hospital , Taichung , Taiwan
| | - Chiung-Chyi Shen
- e Department of Minimally Invasive Skull Base Neurosurgery , Neurological Institute, Taichung Veterans General Hospital , Taichung , Taiwan
| | - Hsu-Tung Lee
- f Department of Neurosurgical Oncology , Neurological Institute, Taichung Veterans General Hospital , Taichung , Taiwan
| | - Chen Chang
- g Institute of Biomedical Sciences, Academic Sinica , Taipei , Taiwan
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23
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Okuyama S, Shinoka W, Nakamura K, Kotani M, Sawamoto A, Sugawara K, Sudo M, Nakajima M, Furukawa Y. Suppressive effects of the peel of Citrus kawachiensis (Kawachi Bankan) on astroglial activation, tau phosphorylation, and inhibition of neurogenesis in the hippocampus of type 2 diabetic db/db mice. Biosci Biotechnol Biochem 2018; 82:1384-1395. [DOI: 10.1080/09168451.2018.1469396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
ABSTRACT
We previously reported that the dried peel powder of Citrus kawachiensis exerted anti-inflammatory effects in the brain in several animal models. Hyperglycemia induces inflammation and oxidative stress and causes massive damage in the brain; therefore, we herein examined the anti-inflammatory and other effects of the dried peel powder of C. kawachiensis in the streptozotocin-induced hyperglycemia mice model and in the type 2 diabetic db/db mice model. The C. kawachiensis administration inhibited microglial activation in the hippocampus in the streptozotocin-injected mice. Moreover, The C. kawachiensis treatment inhibited astroglial activation in the hippocampus and the hyperphosphorylation of tau at 231 of threonine and 396 of serine in hippocampal neurons, and also relieved the suppression of neurogenesis in the dentate gyrus of the hippocampus in the db/db mice. It was suggested that the dried peel powder of C. kawachiensis exerts anti-inflammatory and neuroprotective effects in the brain.
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Affiliation(s)
- Satoshi Okuyama
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Wakana Shinoka
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Kumi Nakamura
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Maho Kotani
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Atsushi Sawamoto
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Kuniaki Sugawara
- Department of Planning and Development, Ehime Beverage Inc. , Matsuyama, Japan
| | - Masahiko Sudo
- Department of Planning and Development, Ehime Beverage Inc. , Matsuyama, Japan
| | - Mitsunari Nakajima
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
| | - Yoshiko Furukawa
- Department of Pharmaceutical Pharmacology, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Japan
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24
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Impairment of Axonal Transport in Diabetes: Focus on the Putative Mechanisms Underlying Peripheral and Central Neuropathies. Mol Neurobiol 2018; 56:2202-2210. [PMID: 30003516 DOI: 10.1007/s12035-018-1227-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/05/2018] [Indexed: 10/28/2022]
Abstract
Diabetes mellitus is a chronic disease with numerous complications that severely impact on the quality of life of patients. Different neuropathies may arise as complications associated with the nervous system, both peripherally and at the central level. The mechanisms behind these neuronal complications are far from being clarified, but axonal transport impairment, a vital process for neuronal physiology, has been described in the context of experimental diabetes. Alterations in neuronal cytoskeleton and motor proteins, deficits in ATP supply or neuroinflammation, as processes that disturb the effective transport of cargoes along the axon, were reported as putative causes of axonal impairment, ultimately leading to axonal degeneration. The main goal of the present review is to reunite the main studies in the literature exploring diabetes-induced alterations likely involved in axonal transport deficits, and call the attention for the uttermost importance of further exploring the field. Understanding the mechanisms underlying neuronal deficits in diabetes is crucial for the development of new therapeutic strategies to prevent neuronal degeneration in diabetes and related neuropathies.
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25
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Hypothalamic inflammation and malfunctioning glia in the pathophysiology of obesity and diabetes: Translational significance. Biochem Pharmacol 2018; 153:123-133. [DOI: 10.1016/j.bcp.2018.01.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 01/09/2018] [Indexed: 12/25/2022]
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26
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Berkowitz BA. Oxidative stress measured in vivo without an exogenous contrast agent using QUEST MRI. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2018; 291:94-100. [PMID: 29705036 PMCID: PMC5963509 DOI: 10.1016/j.jmr.2018.01.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 01/09/2018] [Accepted: 01/24/2018] [Indexed: 05/10/2023]
Abstract
Decades of experimental studies have implicated excessive generation of reactive oxygen species (ROS) in the decline of tissue function during normal aging, and as a pathogenic factor in a vast array of fatal or debilitating morbidities. This massive body of work has important clinical implications since many antioxidants are FDA approved, readily cross blood-tissue barriers, and are effective at improving disease outcomes. Yet, the potential benefits of antioxidants have remained largely unrealized in patients because conventional methods cannot determine the dose, timing, and drug combinations to be used in clinical trials to localize and decrease oxidative stress. To address this major problem and improve translational success, new methods are urgently needed that non-invasively measure the same ROS biomarker both in animal models and patients with high spatial resolution. Here, we summarize a transformative solution based on a novel method: QUEnch-assiSTed MRI (QUEST MRI). The QUEST MRI index is a significant antioxidant-induced improvement in pathophysiology, or a reduction in 1/T1 (i.e., R1). The latter form of QUEST MRI provides a unique measure of uncontrolled production of endogenous, paramagnetic reactive oxygen species (ROS). QUEST MRI results to-date have been validated by gold standard oxidative stress assays. QUEST MRI has high translational potential because it does not use an exogenous contrast agent and requires only standard MRI equipment. Summarizing, QUEST MRI is a powerful non-invasive approach with unprecedented potential for (i) bridging antioxidant treatment in animal models and patients, (ii) identifying tissue subregions exhibiting oxidative stress, and (iii) coupling oxidative stress localization with behavioral dysfunction, disease pathology, and genetic vulnerabilities to serve as a marker of susceptibility.
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Affiliation(s)
- Bruce A Berkowitz
- Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, MI 48201, United States; Department of Ophthalmology, Wayne State University School of Medicine, Detroit, MI 48201, United States.
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27
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Redel JM, DiFrancesco M, Vannest J, Altaye M, Beebe D, Khoury J, Dolan LM, Lee G, Brunner H, Holland S, Brady C, Shah AS. Brain gray matter volume differences in obese youth with type 2 diabetes: a pilot study. J Pediatr Endocrinol Metab 2018; 31:261-268. [PMID: 29373319 DOI: 10.1515/jpem-2017-0349] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 12/22/2017] [Indexed: 01/18/2023]
Abstract
BACKGROUND Adults with type 2 diabetes (T2D) have significantly lower gray matter volume (GMV) compared to healthy peers. Whether GMV differences exist in youth with T2D remains unclear. Thus, we compared global and regional GMV between obese youth with T2D with age, race and sex similar healthy controls. METHODS In a cross-sectional study, 20 obese youth with T2D underwent T1-weighted brain magnetic resonance imaging (MRI). Comparisons were made to 20 age, race and sex similar controls. Differences in global and regional GMV between groups were identified using voxel-based morphometry (VBM). RESULTS Youth with T2D had a significantly lower global GMV-to-intracranial volume ratio (0.51±0.02 in T2D vs. 0.53±0.02 in controls, p=0.02, Cohen's d=0.85). There were 14 regions where GMV was significantly lower in the T2D group, and nine of these were found in either the temporal or occipital lobes. There were six regions with increased GMV in T2D. All regional differences were significant at p<0.05 after adjusting for multiple comparisons. CONCLUSIONS Results from this pilot study show obese youth with T2D have significantly lower global GMV and regional GMV differences, when compared to their age, race and sex similar peers. Future work is needed to determine whether these brain findings are a direct result of adolescent-onset T2D.
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Affiliation(s)
- Jacob M Redel
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA, Phone: 513-636-4479, Fax: 513-803-1174
| | - Mark DiFrancesco
- Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Neuroimaging Research Consortium, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jennifer Vannest
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Mekibib Altaye
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Dean Beebe
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jane Khoury
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Lawrence M Dolan
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Gregory Lee
- Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Neuroimaging Research Consortium, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Hermine Brunner
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Rheumatology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Scott Holland
- Department of Radiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Neuroimaging Research Consortium, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Cassandra Brady
- Division of Endocrinology and Diabetes, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, TN, USA.,Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Amy S Shah
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
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28
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Eugenosedin-A improves glucose metabolism and inhibits MAPKs expression in streptozotocin/nicotinamide-induced diabetic rats. Kaohsiung J Med Sci 2018; 34:142-149. [DOI: 10.1016/j.kjms.2017.11.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 10/31/2017] [Accepted: 11/08/2017] [Indexed: 11/22/2022] Open
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29
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Pesaresi M, Giatti S, Spezzano R, Romano S, Diviccaro S, Borsello T, Mitro N, Caruso D, Garcia-Segura LM, Melcangi RC. Axonal transport in a peripheral diabetic neuropathy model: sex-dimorphic features. Biol Sex Differ 2018; 9:6. [PMID: 29351809 PMCID: PMC5775621 DOI: 10.1186/s13293-018-0164-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 01/02/2018] [Indexed: 02/07/2023] Open
Abstract
Background Disruption of axonal transport plays a pivotal role in diabetic neuropathy. A sex-dimorphism exists in the incidence and symptomatology of diabetic neuropathy; however, no studies so far have addressed sex differences in axonal motor proteins expression in early diabetes as well as the possible involvement of neuroactive steroids. Interestingly, recent data point to a role for mitochondria in the sexual dimorphism of neurodegenerative diseases. Mitochondria have a fundamental role in axonal transport by producing the motors’ energy source, ATP. Moreover, neuroactive steroids can also regulate mitochondrial function. Methods Here, we investigated the impact of short-term diabetes in the peripheral nervous system of male and female rats on key motor proteins important for axonal transport, mitochondrial function, and neuroactive steroids levels. Results We show that short-term diabetes alters mRNA levels and axoplasm protein contents of kinesin family member KIF1A, KIF5B, KIF5A and Myosin Va in male but not in female rats. Similarly, the expression of peroxisome proliferator-activated receptor γ co-activator-1α, a subunit of the respiratory chain complex IV, ATP levels and the key regulators of mitochondrial dynamics were affected in males but not in females. Concomitant analysis of neuroactive steroid levels in sciatic nerve showed an alteration of testosterone, dihydrotestosterone, and allopregnanolone in diabetic males, whereas no changes were observed in female rats. Conclusions These findings suggest that sex-specific decrease in neuroactive steroid levels in male diabetic animals may cause an alteration in their mitochondrial function that in turn might impact in axonal transport, contributing to the sex difference observed in diabetic neuropathy.
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Affiliation(s)
- Marzia Pesaresi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy
| | - Silvia Giatti
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy
| | - Roberto Spezzano
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy
| | - Simone Romano
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy
| | - Silvia Diviccaro
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy
| | - Tiziana Borsello
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy.,Department of Neuroscience, IRCCS-Mario Negri Institute for Pharmacological Research, Milano, Italy
| | - Nico Mitro
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy
| | - Donatella Caruso
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy
| | - Luis Miguel Garcia-Segura
- Instituto Cajal, CSIC, CIBER de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain
| | - Roberto Cosimo Melcangi
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy.
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30
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Shen Y, Yan Y, Lu L, Qian Y, Guan X, Zhang L, Qi Y, Gu L, Ding F. Klotho ameliorates hydrogen peroxide-induced oxidative injury in TCMK-1 cells. Int Urol Nephrol 2017; 50:787-798. [PMID: 29285593 DOI: 10.1007/s11255-017-1765-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 12/05/2017] [Indexed: 12/31/2022]
Abstract
PURPOSE Defects in Klotho gene expression in mice result in a vulnerability to oxidative injuries. We aimed to identify the expression of Klotho in a mouse tubular epithelial (TCMK-1) cell line, and also to investigate changes in Klotho expression induced by oxidative stress and the potential role of intra- and extracellular Klotho protein. METHODS During exposure to hydrogen peroxide (H2O2), an overexpression of the Klotho gene was induced and exogenous Klotho protein was added in TCMK-1 cells. The generation of reactive oxidative species (ROS) was examined by flow cytometry, and cell viability was assessed by Cell Counting Kit-8. Cellular apoptosis was determined by flow cytometry and Hoechst 33258 staining followed by Western blotting to evaluate the expression of Klotho, antioxidant enzymes, and apoptosis-associated proteins. RESULTS While H2O2 significantly suppressed Klotho expression, cell viability, and the expression of antioxidant enzymes in a concentration-dependent manner, cellular apoptosis was increased and p38/MAPK and JNK/MAPK were activated. Intra- and extracellular Klotho remarkably ameliorated viability inhibition, ROS generation, and cellular apoptosis induced by H2O2. Intra- and extracellular Klotho also reversed the loss of antioxidant enzymes, the elevation of cleaved Caspase-3 and Bax/Bcl-2, and the phosphorylation of JNK/MAPK and p38/MAPK. CONCLUSIONS Klotho has posed antioxidant and anti-apoptotic effects on oxidative injuries in TCMK-1 cells, which might be partially related to its inhibition of JNK/MAPK and p38/MAPK phosphorylation and subsequent elevation of antioxidant enzymes. Increasing Klotho expression has played a protective role against oxidative stress in tubular epithelial cells.
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Affiliation(s)
- Yue Shen
- Department of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, 639 Zhizaoju Rd., Shanghai, 200011, China
| | - Yucheng Yan
- Department of Nephrology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Rd., Shanghai, 200127, China.
| | - Liming Lu
- Shanghai Institute of Immunology, School of Medicine, Shanghai Jiao Tong University, 227 South Chongqing Rd., Shanghai, 200025, China
| | - Yingying Qian
- Department of Nephrology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Rd., Shanghai, 200127, China
| | - Xuejing Guan
- Department of Nephrology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Rd., Shanghai, 200127, China
| | - Lulu Zhang
- Department of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, 639 Zhizaoju Rd., Shanghai, 200011, China
| | - Yuanyuan Qi
- Shanghai Institute of Immunology, School of Medicine, Shanghai Jiao Tong University, 227 South Chongqing Rd., Shanghai, 200025, China
| | - Leyi Gu
- Department of Nephrology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Rd., Shanghai, 200127, China
| | - Feng Ding
- Department of Nephrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, 639 Zhizaoju Rd., Shanghai, 200011, China
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Jun JE, Lee SE, Lee YB, Ahn JY, Kim G, Jin SM, Hur KY, Lee MK, Kim JH. Glycated albumin and its variability as an indicator of cardiovascular autonomic neuropathy development in type 2 diabetic patients. Cardiovasc Diabetol 2017; 16:127. [PMID: 29017498 PMCID: PMC5635541 DOI: 10.1186/s12933-017-0619-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 10/06/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND We investigated whether glycated albumin (GA) and its variability are associated with cardiovascular autonomic neuropathy (CAN) and further compared their associations with glycated hemoglobin (HbA1c). METHODS This retrospective longitudinal study included 498 type 2 diabetic patients without CAN. CAN was defined as at least two abnormal results in parasympathetic tests or presence of orthostatic hypotension. The mean, standard deviation (SD), and coefficient of variance (CV) were calculated from consecutively measured GA (median 7 times) and HbA1c levels (median 8 times) over 2 years. Logistic regression analysis was used to compare the associations between CAN and GA- or HbA1c-related parameters. Receiver operating characteristic (ROC) curve analysis was used to compare the predictive power for CAN between GA- and HbA1c-related parameters. RESULTS A total of 53 subjects (10.6%) developed CAN over 2 years. The mean, SD, and CV of GA or HbA1c were significantly higher in subjects with CAN. Higher mean GA and GA variability were associated with the risk of developing CAN, independent of conventional risk factors and HbA1c. In ROC curve analysis, the SD and CV of GA showed higher predictive value for CAN compared to the SD and CV of HbA1c, whereas the predictive value of mean GA did not differ from that of mean HbA1c. The mean, SD, and CV of GA showed additive predictive power to detect CAN development along with mean HbA1c. CONCLUSIONS Higher serum GA and its variability are significantly associated with the risk of developing CAN. Serum GA might be a useful indicator for diabetic complications and can enhance HbA1c's modest clinical prediction for CAN.
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Affiliation(s)
- Ji Eun Jun
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Seung-Eun Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - You-Bin Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Ji Yeon Ahn
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Gyuri Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Sang-Man Jin
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Kyu Yeon Hur
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Moon-Kyu Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - Jae Hyeon Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea. .,Department of Clinical Research Design & Evaluation, SAIHST, Sungkyunkwan University, 81 Irwon-ro, Gangnam-gu, Seoul, Republic of Korea.
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Salvadores N, Sanhueza M, Manque P, Court FA. Axonal Degeneration during Aging and Its Functional Role in Neurodegenerative Disorders. Front Neurosci 2017; 11:451. [PMID: 28928628 PMCID: PMC5591337 DOI: 10.3389/fnins.2017.00451] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 07/25/2017] [Indexed: 12/11/2022] Open
Abstract
Aging constitutes the main risk factor for the development of neurodegenerative diseases. This represents a major health issue worldwide that is only expected to escalate due to the ever-increasing life expectancy of the population. Interestingly, axonal degeneration, which occurs at early stages of neurodegenerative disorders (ND) such as Alzheimer's disease, Amyotrophic lateral sclerosis, and Parkinson's disease, also takes place as a consequence of normal aging. Moreover, the alteration of several cellular processes such as proteostasis, response to cellular stress and mitochondrial homeostasis, which have been described to occur in the aging brain, can also contribute to axonal pathology. Compelling evidence indicate that the degeneration of axons precedes clinical symptoms in NDs and occurs before cell body loss, constituting an early event in the pathological process and providing a potential therapeutic target to treat neurodegeneration before neuronal cell death. Although, normal aging and the development of neurodegeneration are two processes that are closely linked, the molecular basis of the switch that triggers the transition from healthy aging to neurodegeneration remains unrevealed. In this review we discuss the potential role of axonal degeneration in this transition and provide a detailed overview of the literature and current advances in the molecular understanding of the cellular changes that occur during aging that promote axonal degeneration and then discuss this in the context of ND.
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Affiliation(s)
- Natalia Salvadores
- Center for Integrative Biology, Faculty of Sciences, Universidad MayorSantiago, Chile.,Fondap Geroscience Center for Brain Health and MetabolismSantiago, Chile
| | - Mario Sanhueza
- Center for Integrative Biology, Faculty of Sciences, Universidad MayorSantiago, Chile.,Fondap Geroscience Center for Brain Health and MetabolismSantiago, Chile
| | - Patricio Manque
- Center for Integrative Biology, Faculty of Sciences, Universidad MayorSantiago, Chile
| | - Felipe A Court
- Center for Integrative Biology, Faculty of Sciences, Universidad MayorSantiago, Chile.,Fondap Geroscience Center for Brain Health and MetabolismSantiago, Chile
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Prior R, Van Helleputte L, Benoy V, Van Den Bosch L. Defective axonal transport: A common pathological mechanism in inherited and acquired peripheral neuropathies. Neurobiol Dis 2017; 105:300-320. [DOI: 10.1016/j.nbd.2017.02.009] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/29/2017] [Accepted: 02/20/2017] [Indexed: 12/29/2022] Open
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Bathina S, Srinivas N, Das UN. Streptozotocin produces oxidative stress, inflammation and decreases BDNF concentrations to induce apoptosis of RIN5F cells and type 2 diabetes mellitus in Wistar rats. Biochem Biophys Res Commun 2017; 486:406-413. [PMID: 28315336 DOI: 10.1016/j.bbrc.2017.03.054] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Accepted: 03/13/2017] [Indexed: 01/21/2023]
Abstract
BACKGROUND Neurodegenerative disorders, such as deficits in learning, memory and cognition and Alzheimer's disease are associated with diabetes mellitus. Brain-derived neurotrophic factor (BDNF) is a neurotrophic factor and is known to possess anti-obesity, anti-diabetic actions and is believed to have a role in memory and Alzheimer's disease. OBJECTIVE To investigate whether STZ can reduce BDNF production by rat insulinoma (RIN5F) cells in vitro and decrease BDNF levels in the pancreas, liver and brain in vivo. METHODS Streptozotocin (STZ)-induced cytotoxicity to RIN5F cells in vitro and type 2 DM in Wistar rats was employed in the present study. Cell viability, activities of various anti-oxidants and secretion of BDNF by RIN5F cells in vitro were measured using MTT assay, biochemical methods and ELISA respectively. In STZ-induced type 2 DM rats: plasma glucose, interleukin-6 and tumor necrosis factor-α levels and BDNF protein expression in the pancreas, liver and brain tissues were measured. In addition, neuronal count and morphology in the hippocampus and hypothalamus areas was assessed. RESULTS STZ-induced suppression of RIN5F cell viability was abrogated by BDNF. STZ suppressed BDNF secretion by RIN5F cells in vitro. STZ-induced type 2 DM rats showed hyperglycemia, enhanced plasma IL-6 and TNF-αlevels and reduced plasma and pancreas, liver and brain tissues (P < 0.001) and increased oxidative stress compared to untreated control. Hypothalamic and hippocampal neuron in STZ-treated animals showed a decrease in the number of neurons and morphological changes suggesting of STZ cytotoxicity. CONCLUSIONS The results of the present study suggest that STZ is not only cytotoxic to pancreatic beta cells but also to hypothalamic and hippocampal neurons by inducing oxidative stress. STZ ability to suppress BDNF production by pancreas, liver and brain tissues suggests that impaired memory, learning, and cognitive dysfunction seen in diabetes mellitus could be due to BDNF deficiency.
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Affiliation(s)
- Siresha Bathina
- BioScience Research Centre, Department of Medicine, Gayatri Vidya Parishad Hospital, GVP College of Engineering Campus, Visakhapatnam 530048, India.
| | - Nanduri Srinivas
- National Institute of Pharmaceutical Education and Research, Hyderabad, India
| | - Undurti N Das
- BioScience Research Centre, Department of Medicine, Gayatri Vidya Parishad Hospital, GVP College of Engineering Campus, Visakhapatnam 530048, India; UND Life Sciences, 2221, NW 5th St, Battle Ground, WA 98604, USA.
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Duda-Sobczak A, Araszkiewicz A, Urbas M, Borucki L, Kulas K, Chudzinski M, Suwalska A, Zozulinska-Ziolkiewicz D. Impaired olfactory function is related to the presence of neuropathy in adults with type 1 diabetes. Diab Vasc Dis Res 2017; 14:139-143. [PMID: 28103703 DOI: 10.1177/1479164116679079] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION Olfactory dysfunction is suggested to be a clinical manifestation of central diabetic neuropathy. The aim of the study was to assess olfactory function in adult patients with type 1 diabetes. MATERIALS AND METHODS A total of 106 patients with type 1 diabetes and 30 healthy subjects were included in the study. We evaluated the metabolic control of diabetes and the presence of chronic complications. Olfactory function was assessed with Sniffin' Sticks. RESULTS We found a negative correlation between olfactory identification scores and body mass index ( Rs -0.2; p = 0.04) and triglycerides ( Rs = -0.2; p = 0.04). We showed lower olfactory identification scores in neuropathy group versus non-neuropathy group [8 (interquartile range, 7-9) vs 10 (interquartile range, 9-11) points; p = 0.005]. In multivariate linear regression, impaired olfaction was independently associated with neuropathy (beta, -0.3; p = 0.005). In multivariate logistic regression, diabetes duration (odds ratio, 1.06; 95% confidence interval, 1.00-1.11; p = 0.04) and olfactory identification score (odds ratio, 0.61; 95% confidence interval, 0.43-0.85; p = 0.003) were independently associated with neuropathy. CONCLUSION Olfactory dysfunction is observed in patients with type 1 diabetes and diabetic peripheral neuropathy.
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Affiliation(s)
- Anna Duda-Sobczak
- 1 Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznań, Poland
| | - Aleksandra Araszkiewicz
- 1 Department of Internal Medicine and Diabetology, Poznan University of Medical Sciences, Poznań, Poland
| | - Magdalena Urbas
- 2 Department of Otorhinolaryngology, Raszeja City Hospital, Poznań, Poland
| | - Lukasz Borucki
- 2 Department of Otorhinolaryngology, Raszeja City Hospital, Poznań, Poland
| | - Katarzyna Kulas
- 3 Laboratory of Neuropsychobiology, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland
| | - Maciej Chudzinski
- 3 Laboratory of Neuropsychobiology, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland
| | - Aleksandra Suwalska
- 3 Laboratory of Neuropsychobiology, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland
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Soliman RH, Ismail OA, Badr MS, Nasr SM. Resveratrol ameliorates oxidative stress and organ dysfunction in Schistosoma mansoni infected mice. Exp Parasitol 2017; 174:52-58. [PMID: 28167208 DOI: 10.1016/j.exppara.2017.02.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 01/04/2017] [Accepted: 02/03/2017] [Indexed: 10/20/2022]
Abstract
Schistosoma mansoni causes a major chronic debilitating disease in more than 230 million people around the world. The pathognomonic granuloma is a major cause of the oxidative stress encountered as a consequence of infection not only in the liver, but also in other important organs as spleen, lung, brain and kidney. Resveratrol administration at a dose of 20 mg/kg once daily for two weeks to mice infected with Schistosoma mansoni resulted in improvement in serum cholesterol and triglyceride levels. Enzymatic antioxidant profile showed significant modulations in Superoxide dismutase, catalase activities and reduced glutathione levels. Specific biomarkers for homeostasis of brain and lung i.e. Tau and RAGE respectively, showed significant improvement after resveratrol administration.
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Affiliation(s)
- R H Soliman
- Faculty of Medicine, Parasitology Department, Suez Canal University, Ismaillia, Egypt; Faculty of Medicine, Parasitology Department, Taif University, KSA.
| | - O A Ismail
- Faculty of Medicine, Parasitology Department, Suez Canal University, Ismaillia, Egypt
| | - M S Badr
- Medical Research Center, Ain Shams University Hospital, Faculty of Medicine, Egypt
| | - S M Nasr
- Biochemistry and Molecular Biology Department, Theodor Bilharz Research Institute, Giza, Egypt
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Kancherla S, Kohler WJ, van der Merwe Y, Chan KC. In Vivo Evaluation of the Visual Pathway in Streptozotocin-Induced Diabetes by Diffusion Tensor MRI and Contrast Enhanced MRI. PLoS One 2016; 11:e0165169. [PMID: 27768755 PMCID: PMC5074510 DOI: 10.1371/journal.pone.0165169] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 10/07/2016] [Indexed: 02/07/2023] Open
Abstract
Visual function has been shown to deteriorate prior to the onset of retinopathy in some diabetic patients and experimental animal models. This suggests the involvement of the brain's visual system in the early stages of diabetes. In this study, we tested this hypothesis by examining the integrity of the visual pathway in a diabetic rat model using in vivo multi-modal magnetic resonance imaging (MRI). Ten-week-old Sprague-Dawley rats were divided into an experimental diabetic group by intraperitoneal injection of 65 mg/kg streptozotocin in 0.01 M citric acid, and a sham control group by intraperitoneal injection of citric acid only. One month later, diffusion tensor MRI (DTI) was performed to examine the white matter integrity in the brain, followed by chromium-enhanced MRI of retinal integrity and manganese-enhanced MRI of anterograde manganese transport along the visual pathway. Prior to MRI experiments, the streptozotocin-induced diabetic rats showed significantly smaller weight gain and higher blood glucose level than the control rats. DTI revealed significantly lower fractional anisotropy and higher radial diffusivity in the prechiasmatic optic nerve of the diabetic rats compared to the control rats. No apparent difference was observed in the axial diffusivity of the optic nerve, the chromium enhancement in the retina, or the manganese enhancement in the lateral geniculate nucleus and superior colliculus between groups. Our results suggest that streptozotocin-induced diabetes leads to early injury in the optic nerve when no substantial change in retinal integrity or anterograde transport along the visual pathways was observed in MRI using contrast agent enhancement. DTI may be a useful tool for detecting and monitoring early pathophysiological changes in the visual system of experimental diabetes non-invasively.
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Affiliation(s)
- Swarupa Kancherla
- NeuroImaging Laboratory, University of Pittsburgh, Pittsburgh, PA, United States of America
- UPMC Eye Center, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - William J. Kohler
- NeuroImaging Laboratory, University of Pittsburgh, Pittsburgh, PA, United States of America
- UPMC Eye Center, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Yolandi van der Merwe
- NeuroImaging Laboratory, University of Pittsburgh, Pittsburgh, PA, United States of America
- UPMC Eye Center, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, United States of America
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America
- Louis J. Fox Center for Vision Restoration, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Kevin C. Chan
- NeuroImaging Laboratory, University of Pittsburgh, Pittsburgh, PA, United States of America
- UPMC Eye Center, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, United States of America
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States of America
- Louis J. Fox Center for Vision Restoration, University of Pittsburgh, Pittsburgh, PA, United States of America
- Center for the Neural Basis of Cognition, University of Pittsburgh and Carnegie Mellon University, Pittsburgh, PA, United States of America
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
- * E-mail:
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Neuroimaging in Alzheimer's disease: preclinical challenges toward clinical efficacy. Transl Res 2016; 175:37-53. [PMID: 27033146 DOI: 10.1016/j.trsl.2016.03.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/05/2016] [Accepted: 03/06/2016] [Indexed: 12/21/2022]
Abstract
The scope of this review focuses on recent applications in preclinical and clinical magnetic resonance imaging (MRI) toward accomplishing the goals of early detection and responses to therapy in animal models of Alzheimer's disease (AD). Driven by the outstanding efforts of the Alzheimer's Disease Neuroimaging Initiative (ADNI), a truly invaluable resource, the initial use of MRI in AD imaging has been to assess changes in brain anatomy, specifically assessing brain shrinkage and regional changes in white matter tractography using diffusion tensor imaging. However, advances in MRI have led to multiple efforts toward imaging amyloid beta plaques first without and then with the use of MRI contrast agents. These technological advancements have met with limited success and are not yet appropriate for the clinic. Recent developments in molecular imaging inclusive of high-power liposomal-based MRI contrast agents as well as fluorine 19 ((19)F) MRI and manganese enhanced MRI have begun to propel promising advances toward not only plaque imaging but also using MRI to detect perturbations in subcellular processes occurring within the neuron. This review concludes with a discussion about the necessity for the development of novel preclinical models of AD that better recapitulate human AD for the imaging to truly be meaningful and for substantive progress to be made toward understanding and effectively treating AD. Furthermore, the continued support of outstanding programs such as ADNI as well as the development of novel molecular imaging agents and MRI fast scanning sequences will also be requisite to effectively translate preclinical findings to the clinic.
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Falkowska A, Gutowska I, Goschorska M, Nowacki P, Chlubek D, Baranowska-Bosiacka I. Energy Metabolism of the Brain, Including the Cooperation between Astrocytes and Neurons, Especially in the Context of Glycogen Metabolism. Int J Mol Sci 2015; 16:25959-81. [PMID: 26528968 PMCID: PMC4661798 DOI: 10.3390/ijms161125939] [Citation(s) in RCA: 177] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 09/27/2015] [Accepted: 10/16/2015] [Indexed: 01/15/2023] Open
Abstract
Glycogen metabolism has important implications for the functioning of the brain, especially the cooperation between astrocytes and neurons. According to various research data, in a glycogen deficiency (for example during hypoglycemia) glycogen supplies are used to generate lactate, which is then transported to neighboring neurons. Likewise, during periods of intense activity of the nervous system, when the energy demand exceeds supply, astrocyte glycogen is immediately converted to lactate, some of which is transported to the neurons. Thus, glycogen from astrocytes functions as a kind of protection against hypoglycemia, ensuring preservation of neuronal function. The neuroprotective effect of lactate during hypoglycemia or cerebral ischemia has been reported in literature. This review goes on to emphasize that while neurons and astrocytes differ in metabolic profile, they interact to form a common metabolic cooperation.
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Affiliation(s)
- Anna Falkowska
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111 Szczecin, Poland.
| | - Izabela Gutowska
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Broniewskiego 24, 71-460 Szczecin, Poland.
| | - Marta Goschorska
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111 Szczecin, Poland.
| | - Przemysław Nowacki
- Department of Neurology, Pomeranian Medical University, Unii Lubelskiej 1, 71-225 Szczecin, Poland.
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111 Szczecin, Poland.
| | - Irena Baranowska-Bosiacka
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111 Szczecin, Poland.
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Majid T, Griffin D, Criss Z, Jarpe M, Pautler RG. Pharmocologic treatment with histone deacetylase 6 inhibitor (ACY-738) recovers Alzheimer's disease phenotype in amyloid precursor protein/presenilin 1 (APP/PS1) mice. ALZHEIMERS & DEMENTIA-TRANSLATIONAL RESEARCH & CLINICAL INTERVENTIONS 2015; 1:170-181. [PMID: 29854936 PMCID: PMC5975056 DOI: 10.1016/j.trci.2015.08.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Introduction Current therapy for Alzheimer's disease (AD) focuses on delaying progression, illustrating the need for more effective therapeutic targets. Histone deacetylase 6 (HDAC6) modulates tubulin acetylation and has been implicated as an attractive target. HDAC6 is also elevated in postmortem tissue samples from patients. However, HDAC6 inhibitors have had limited success preclinically due to low blood-brain barrier penetration. Method We investigated a specific, potent HDAC6 inhibitor (ACY-738) in a mouse model of AD. We determined the effects of ACY-738 treatment on axonal transport, behavior, and pathology in amyloid precursor protein/presenilin 1 mice. Results We demonstrated improvements in in vivo axonal transport in two treatment groups as a result of ACY-738 brain levels. We also demonstrated recovery of short-term learning and memory deficits, hyperactivity, and modifications of tau and tubulin. Discussion Our findings implicate specific, targeted HDAC6 inhibitors as potential therapeutics and demonstrate that further investigations are warranted into effects of HDAC6 inhibitors in AD.
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Affiliation(s)
- Tabassum Majid
- Interdepartmental Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Deric Griffin
- Interdepartmental Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Zachary Criss
- Interdepartmental Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, USA
| | | | - Robia G Pautler
- Interdepartmental Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, USA.,Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA.,Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA
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Wogonin suppresses osteopontin expression in adipocytes by activating PPARα. Acta Pharmacol Sin 2015; 36:987-97. [PMID: 26073326 PMCID: PMC4564880 DOI: 10.1038/aps.2015.37] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 03/30/2015] [Indexed: 12/14/2022] Open
Abstract
AIM Wogonin (5,7-dihydroxy-8-methoxyflavone), a major bioactive compound of the flavonoid family, is commonly extracted from the traditional Chinese medicine Scutellaria baicalensis and possesses antioxidant and anti-inflammatory activities and is assumed to have anti-diabetes function. Indeed, a current study has shown that it can possibly treat metabolic disorders such as those found in db/db mice. However, the underlying molecular mechanism remains largely unclear. The aim of this study was to investigate the impact of wogonin on osteopontin (OPN) expression in adipose tissue from type 1 diabetic mice and in 3T3-L1 adipocytes. METHODS Type 1 diabetes was induced by streptozotocin (STZ) injection. 3T3-L1 preadipocytes were converted to 3T3-L1 adipocytes through treatment with insulin, dexamethasone, and 3-isobutyl-1-methylxanthine (IBMX). Western blot analysis and RT-PCR were performed to detect protein expression and mRNA levels, respectively. RESULTS Wogonin treatment suppressed the increase in serum OPN levels and reduced OPN expression in adipose tissue from STZ-induced type 1 diabetic mice. Administration of wogonin enhanced PPARα expression and activity. Silencing of PPARα diminished the inhibitory effects of wogonin on OPN expression in 3T3-L1 adipocytes. Furthermore, the levels of c-Fos and phosphorylated c-Jun were reduced in wogonin-treated adipose tissue and 3T3-L1 adipocytes. In addition, wogonin treatment dramatically mitigated p38 MAPK phosphorylation. Pharmacological inhibition of p38 MAPK by its specific inhibitor SB203580 increased PPARα activity and decreased OPN expression. CONCLUSION Our results suggest that wogonin downregulated OPN expression in adipocytes through the inhibition of p38 MAPK and the sequential activation of the PPARα pathway. Given the adverse effects of high OPN levels on metabolism, our results provide evidence for the potential administration of wogonin as a treatment for diabetes.
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Malheiros JM, Paiva FF, Longo BM, Hamani C, Covolan L. Manganese-Enhanced MRI: Biological Applications in Neuroscience. Front Neurol 2015. [PMID: 26217304 PMCID: PMC4498388 DOI: 10.3389/fneur.2015.00161] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Magnetic resonance imaging (MRI) is an excellent non-invasive tool to investigate biological systems. The administration of the paramagnetic divalent ion manganese (Mn2+) enhances MRI contrast in vivo. Due to similarities between Mn2+ and calcium (Ca2+), the premise of manganese-enhanced MRI (MEMRI) is that the former may enter neurons and other excitable cells through voltage-gated Ca2+ channels. As such, MEMRI has been used to trace neuronal pathways, define morphological boundaries, and study connectivity in morphological and functional imaging studies. In this article, we provide a brief overview of MEMRI and discuss recently published data to illustrate the usefulness of this method, particularly in animal models.
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Affiliation(s)
- Jackeline Moraes Malheiros
- Department of Physiology, Universidade Federal de São Paulo - UNIFESP , São Paulo , Brazil ; Centro de Imagens e Espectroscopia In vivo por Ressonância Magnética, Institute of Physics of São Carlos, Universidade de São Paulo , São Carlos , Brazil
| | - Fernando Fernandes Paiva
- Centro de Imagens e Espectroscopia In vivo por Ressonância Magnética, Institute of Physics of São Carlos, Universidade de São Paulo , São Carlos , Brazil
| | - Beatriz Monteiro Longo
- Department of Physiology, Universidade Federal de São Paulo - UNIFESP , São Paulo , Brazil
| | - Clement Hamani
- Department of Physiology, Universidade Federal de São Paulo - UNIFESP , São Paulo , Brazil ; Research Imaging Centre, Centre for Addiction and Mental Health , Toronto, ON , Canada ; Centre for Addiction and Mental Health, Campbell Family Mental Health Research Institute , Toronto, ON , Canada
| | - Luciene Covolan
- Department of Physiology, Universidade Federal de São Paulo - UNIFESP , São Paulo , Brazil
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Köksal B, Emre MH, Polat A. Investigation of Propolis' Effect on Thiobarbituric Acid Reactive Substances and Anti-Oxidant Enzyme Levels of Hippocampus in Diabetic Rats Induced by Streptozotocin. Open Access Maced J Med Sci 2015; 3:52-6. [PMID: 27275196 PMCID: PMC4877788 DOI: 10.3889/oamjms.2015.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 02/22/2015] [Accepted: 02/23/2015] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Propolis is an organic resinous viscous substance collected from flower bud and plant sprig by bees. Propolis has a potential treatment agent for oxidative damage caused by diabetes in hippocampus due to its flavonoid and phenolic content. AIM In this study effect of propolis on thiobarbituric acid reactive substances and anti-oxidative enzyme levels of hippocampus in diabetic rats induced by streptozotocin was investigated. MATERIALS AND METHODS The study involved measuring levels of SOD, CAT, GSH-Px and TBARs in hippocampus tissue of STZ-induced diabetic rats (Adult Male Sprague Dawley rats) after applying propolis for one month. The subjects of the study were composed of 51 rats randomly assigned to four groups (Control, STZ, P+STZ and STZ+P). For analysis of data, Kruskal Wallis Test was utilized. RESULTS The findings of the study showed that there were no significant difference in the levels of TBARS, SOD, CAT and GSH-Px of hippocampus across the groups. CONCLUSION Propolis application in four-week duration does not have effect on TBARS, SOD, CAT and GSH-Px levels of hippocampus of diabetic rats. These findings mean that more time for observing oxidative harms on hippocampus is needed.
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Affiliation(s)
- Burcu Köksal
- Inonu University, Faculty of Medicine, Department of Physiology, 44280 Malatya, Turkey
| | - Memet Hanifi Emre
- Inonu University, Faculty of Medicine, Department of Physiology, 44280 Malatya, Turkey
| | - Alaadin Polat
- Inonu University, Faculty of Medicine, Department of Physiology, 44280 Malatya, Turkey
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Sanke H, Mita T, Yoshii H, Yokota A, Yamashiro K, Ingaki N, Onuma T, Someya Y, Komiya K, Tamura Y, Shimizu T, Ohmura C, Kanazawa A, Fujitani Y, Watada H. Relationship between olfactory dysfunction and cognitive impairment in elderly patients with type 2 diabetes mellitus. Diabetes Res Clin Pract 2014; 106:465-73. [PMID: 25451914 DOI: 10.1016/j.diabres.2014.09.039] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 08/18/2014] [Accepted: 09/15/2014] [Indexed: 01/06/2023]
Abstract
AIMS Recent clinical studies identified the relation between olfactory dysfunction and cognitive impairment in the elderly without type 2 diabetes mellitus. The aim of the present study was to define the relation between olfactory function and cognition in elderly patients with type 2 diabetes mellitus. METHODS The study participants comprised 250 elderly (age, 68-77, median 72) Japanese outpatient with type 2 diabetes mellitus free of clinically-evident cognitive impairment. Olfactory and cognitive functions were evaluated by the Open Essence (OE) test and Mini-mental State Examination (MMSE), respectively. RESULTS Based on the MMSE score, 62.0%, 24.4%, and 13.6% of the participants were considered to have no impairment, possible cognitive impairment and probable dementia, respectively. The OE test score of the probable dementia group was significantly lower than other groups. Furthermore, age and serum uric acid were significantly higher in the probable dementia group than other groups. Simple correlation analysis showed positive correlation between the MMSE score and diastolic blood pressure, education, OE test score, total cholesterol, LDL cholesterol, folic acid, and negative correlation with age, HbA1c, aspartate aminotransferase, serum adiponectin and urinary albumin excretion. Multivariate regression analysis showed that OE test score correlated significantly and independently with MMSE score (standardized coefficients β=0.542, R(2)=0.478, P<0.01), in addition to education level, HbA1c and serum adiponectin. CONCLUSIONS The results suggested the association of olfactory dysfunction with cognitive impairment in elderly patients with type 2 diabetes mellitus.
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Affiliation(s)
- Haruna Sanke
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Tomoya Mita
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Center for Molecular Diabetology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan.
| | - Hidenori Yoshii
- Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center, Shinsuna 3-3-20, Koto-ku, Tokyo 136-0075, Japan
| | - Ayako Yokota
- Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center, Shinsuna 3-3-20, Koto-ku, Tokyo 136-0075, Japan
| | - Keiko Yamashiro
- Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center, Shinsuna 3-3-20, Koto-ku, Tokyo 136-0075, Japan
| | - Noriko Ingaki
- Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center, Shinsuna 3-3-20, Koto-ku, Tokyo 136-0075, Japan
| | - Tomio Onuma
- Department of Medicine, Diabetology & Endocrinology Juntendo Tokyo Koto Geriatric Medical Center, Shinsuna 3-3-20, Koto-ku, Tokyo 136-0075, Japan
| | - Yuki Someya
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Koji Komiya
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Yoshifumi Tamura
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Sportology Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Tomoaki Shimizu
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Chie Ohmura
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Akio Kanazawa
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Center for Therapeutic Innovations in Diabetes, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Yoshio Fujitani
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
| | - Hirotaka Watada
- Department of Metabolism & Endocrinology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Center for Therapeutic Innovations in Diabetes, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Center for Molecular Diabetology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan; Sportology Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyoku, Tokyo 113-8421, Japan
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45
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Nagayach A, Patro N, Patro I. Astrocytic and microglial response in experimentally induced diabetic rat brain. Metab Brain Dis 2014; 29:747-61. [PMID: 24833555 DOI: 10.1007/s11011-014-9562-z] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Accepted: 04/30/2014] [Indexed: 02/06/2023]
Abstract
Diabetes Mellitus is associated with increased risk of cognitive and behavioural disorders with hitherto undeciphered role of glia. Glia as majority population in brain serve several vital functions, thus require pertinent revelation to further explicate the mechanisms affecting the brain function following diabetes. In this study we have evaluated glial changes in terms of phenotypic switching, proliferation and expression of activation cell surface markers and associated cellular degeneration in hippocampus following STZ-induced diabetes and caused cognitive impairments. Experimental diabetes was induced in Wistar rats by a single dose of STZ (45 mg/kg body weight; intraperitoneally) and changes were studied in 2nd, 4th and 6th week post diabetes confirmation using Barnes maze and T-maze test, immunohistochemistry and image analysis. An increase in GFAP expression sequentially from 2nd to 6th weeks of diabetes was analogous with the phenotypic changes and increased astrocyte number. Elevated level of S100β with defined stellate morphology further confirmed the astrocytosis following diabetes. Enhanced level of Iba-1 and MHC-II revealed the corroborated microglial activation and proliferation following diabetes, which was unresolved till date. Increased caspase-3 activity induced profound cell death upto 6th weeks post diabetes confirmation. Such caspase 3 mediated cellular damage with a concomitant activation of the astrocytes and microglia suggests that diabetes linked cell death activates the astrocytes and microglia in hippocampus which further underpin the progression and severity of brain disorders resulting in cognitive and behavioural impairments.
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Affiliation(s)
- Aarti Nagayach
- School of Studies in Neuroscience, Jiwaji University, Gwalior, 474011, Madhya Pradesh, India
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Kapoor R, Kakkar P. Naringenin accords hepatoprotection from streptozotocin induced diabetes in vivo by modulating mitochondrial dysfunction and apoptotic signaling cascade. Toxicol Rep 2014; 1:569-581. [PMID: 28962270 PMCID: PMC5598533 DOI: 10.1016/j.toxrep.2014.08.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 08/01/2014] [Accepted: 08/01/2014] [Indexed: 12/31/2022] Open
Abstract
Diabetic complications cause noticeable liver damage, which finally progresses to diabetic hepatopathy. Nutritive antioxidants not only reduce the liver damage, but also prevent it by modulating the release of various proteins involved in apoptotic signaling cascades. This study explores the molecular mechanisms underlying diabetes-induced liver damage and its modulation by naringenin. Antioxidant status, liver & kidney biomarker enzymes, reactive oxygen species (ROS) generation, mitochondrial membrane potential, expression of apoptotic proteins like Bax (bcl-2 associated X), Bcl-2 (b-cell Lymhoma-2), Caspase-3, Caspase-9, AIF (Apoptosis inducing factor) and Endo-G (Endonuclease-G) were studied in streptozotocin induced diabetic rats. Significant hyperglycemia, disturbed antioxidant status, altered carbohydrate metabolizing enzymes, increased ROS and lipid peroxidation; decreased mitochondrial membrane potential and enhanced release of AIF and Endo-G were observed. Hyperglycemia also affected apoptosis and its related genes at both transcriptional and translational level (Caspase-3 & 9, Bax and Bcl-2) in the liver of diabetic rats. Naringenin, a flavonone, exerted anti-hyperglycemic effect and was able to prevent oxidative stress and resultant apoptotic events caused due to diabetes-induced hepatotoxicity. Thus, our study shows, a protective effect of naringenin against diabetes induced liver damage and redox imbalance, which could further be exploited for the management of diabetic hepatopathy.
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Key Words
- AGE, advanced glycated end products
- AIF, apoptosis inducing factor
- Apoptosis
- Bax, bcl-2 associated X
- Bcl-2, b-cell Lymhoma-2
- CAT, catalase
- CoN, diabetic rats co-treated with naringenin during streptozotocin induction
- CtN, control rats treated with naringenin
- Ctrl, control rats
- DCF, dichlorofluorescein
- DCFH-DA, 2′7′dichlorofluorescein diacetate
- DNA,COX-II, cyclo-oxygenase-II
- Diab, diabetic rats
- EDTA, ethylenediaminetetraacetic acid
- Endo-G, endonuclease-G
- FITC, fluorescein isothiocyanate
- GAPDH, glyceraldehyde 3 phosphate dehydrogenase
- GPx, glutathione peroxidase
- GSH, reduced glutathione
- Glib, diabetic rats treated with standard drug glybenclamide
- Glibenclamide (PubChem CID: 3488)
- HRP, horseradish peroxidase
- JC-1, 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazol-carbocyanine iodide
- Liver damage
- MPT, mitochondrial permeability transition
- Mitochondrial dysfunction
- NADPH (PubChem CID: 12598259)
- NADPH, nicotinamide adenine dinucleotide phosphate reduced
- NBT, nitroblue tetrazolium
- Naringenin
- Naringenin (PubChem CID: 932)
- Nicotinamide (PubChem CID: 936)
- Oxidative stress
- PBS, phosphate buffered saline
- PKC, protein kinase-C
- PVDF, polyvinylidene difluoride
- PoN, diabetic rats treated with naringenin after diabetes induction
- ROS, reactive oxygen species
- RT-PCR, reverse transciptase polymerase chain reaction
- SOD, superoxide dismutase
- Sil, diabetic rats treated with silymarin
- Silymarin (PubChem CID: 1548894)
- Sodium dodecyl sulphate (PubChem CID: 3423265)
- Streptozotocin (PubChem CID: 29327)
- Streptozotocin induced diabetes
- Thiobarbituric acid (PubChem CID: 3081198)
- TriChloroacetic acid (PubChem CID: 6421)
- cDNA, complementary
- d-glucose (PubChem CID: 5793)
- p-NA, p-nitro aniline
- ΨΔm, mitochondrial membrane potential
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Affiliation(s)
| | - Poonam Kakkar
- CSIR-Indian Institute of Toxicology Research, M.G. Marg, Lucknow 226001, India
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47
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Lin TH, Kim JH, Perez-Torres C, Chiang CW, Trinkaus K, Cross AH, Song SK. Axonal transport rate decreased at the onset of optic neuritis in EAE mice. Neuroimage 2014; 100:244-53. [PMID: 24936685 DOI: 10.1016/j.neuroimage.2014.06.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 05/30/2014] [Accepted: 06/03/2014] [Indexed: 12/21/2022] Open
Abstract
Optic neuritis is frequently the first symptom of multiple sclerosis (MS), an inflammatory demyelinating neurodegenerative disease. Impaired axonal transport has been considered as an early event of neurodegenerative diseases. However, few studies have assessed the integrity of axonal transport in MS or its animal models. We hypothesize that axonal transport impairment occurs at the onset of optic neuritis in experimental autoimmune encephalomyelitis (EAE) mice. In this study, we employed manganese-enhanced MRI (MEMRI) to assess axonal transport in optic nerves in EAE mice at the onset of optic neuritis. Axonal transport was assessed as (a) optic nerve Mn(2+) accumulation rate (in % signal change/h) by measuring the rate of increased total optic nerve signal enhancement, and (b) Mn(2+) transport rate (in mm/h) by measuring the rate of change in optic nerve length enhanced by Mn(2+). Compared to sham-treated healthy mice, Mn(2+) accumulation rate was significantly decreased by 19% and 38% for EAE mice with moderate and severe optic neuritis, respectively. The axonal transport rate of Mn(2+) was significantly decreased by 43% and 65% for EAE mice with moderate and severe optic neuritis, respectively. The degree of axonal transport deficit correlated with the extent of impaired visual function and diminished microtubule-associated tubulins, as well as the severity of inflammation, demyelination, and axonal injury at the onset of optic neuritis.
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Affiliation(s)
- Tsen-Hsuan Lin
- Department of Physics, Washington University, St. Louis, MO 63130, USA
| | - Joong Hee Kim
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Carlos Perez-Torres
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Chia-Wen Chiang
- Department of Chemistry, Washington University, St. Louis, MO 63130, USA
| | - Kathryn Trinkaus
- Divison of Biostatistics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Anne H Cross
- Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA; Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Sheng-Kwei Song
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Insulin therapy modulates mitochondrial dynamics and biogenesis, autophagy and tau protein phosphorylation in the brain of type 1 diabetic rats. Biochim Biophys Acta Mol Basis Dis 2014; 1842:1154-66. [PMID: 24747740 DOI: 10.1016/j.bbadis.2014.04.011] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 04/08/2014] [Accepted: 04/10/2014] [Indexed: 01/22/2023]
Abstract
The main purpose of this study was to examine whether streptozotocin (STZ)-induced type 1 diabetes (T1D) and insulin (INS) treatment affect mitochondrial function, fission/fusion and biogenesis, autophagy and tau protein phosphorylation in cerebral cortex from diabetic rats treated or not with INS. No significant alterations were observed in mitochondrial function as well as pyruvate levels, despite the significant increase in glucose levels observed in INS-treated diabetic rats. A significant increase in DRP1 protein phosphorylated at Ser616 residue was observed in the brain cortex of STZ rats. Also an increase in NRF2 protein levels and in the number of copies of mtDNA were observed in STZ diabetic rats, these alterations being normalized by INS. A slight decrease in LC3-II levels was observed in INS-treated rats when compared to STZ diabetic animals. An increase in tau protein phosphorylation at Ser396 residue was observed in STZ diabetic rats while INS treatment partially reversed that effect. Accordingly, a modest reduction in the activation of GSK3β and a significant increase in the activity of phosphatase 2A were found in INS-treated rats when compared to STZ diabetic animals. No significant alterations were observed in caspases 9 and 3 activity and synaptophysin and PSD95 levels. Altogether our results show that mitochondrial alterations induced by T1D seem to involve compensation mechanisms since no significant changes in mitochondrial function and synaptic integrity were observed in diabetic animals. In addition, INS treatment is able to normalize the alterations induced by T1D supporting the importance of INS signaling in the brain.
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Arbelaez AM, Semenkovich K, Hershey T. Glycemic extremes in youth with T1DM: the structural and functional integrity of the developing brain. Pediatr Diabetes 2013; 14:541-53. [PMID: 24119040 PMCID: PMC3857606 DOI: 10.1111/pedi.12088] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 08/14/2013] [Accepted: 09/04/2013] [Indexed: 12/13/2022] Open
Abstract
The adult brain accounts for a disproportionally large percentage of the body’s total energy consumption (1). However, during brain development,energy demand is even higher, reaching the adult rate by age 2 and increasing to nearly twice the adult rate by age 10, followed by gradual reduction toward adult levels in the next decade (1,2). The dramatic changes in brain metabolism occurring over the first two decades of life coincide with the initial proliferation and then pruning of synapses to adult levels.The brain derives its energy almost exclusively from glucose and is largely driven by neuronal signaling, biosynthesis, and neuroprotection (3–6).Glucose homeostasis in the body is tightly regulated by a series of hormones and physiologic responses. As a result, hypoglycemia and hyperglycemia are rare occurrences in normal individuals, but they occur commonly inpatients with type 1 diabetes mellitus (T1DM) due to a dysfunction of peripheral glucose-insulin-glucagon responses and non-physiologic doses of exogenous insulin, which imperfectly mimic normal physiology. These extremes can occur more frequently in children and adolescents with T1DM due to the inadequacies of insulin replacement therapy, events leading to the diagnosis [prolonged untreated hyperglycemia and diabetic ketoacidosis (DKA)], and to behavioral factors interfering with optimal treatment. When faced with fluctuations in glucose supply the metabolism of the body and brain change dramatically, largely to conserve resources and, at a cost to other organs, to preserve brain function (7). However,if the normal physiological mechanisms that prevent these severe glucose fluctuations and maintain homeostasis are impaired, neuronal function and potentially viability can be affected (8–11).
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Affiliation(s)
- Ana Maria Arbelaez
- Department of Pediatrics, Washington University School of Medicine St. Louis, Missouri, United States, 63110
| | - Katherine Semenkovich
- Department of Pediatrics, Washington University School of Medicine St. Louis, Missouri, United States, 63110
| | - Tamara Hershey
- Department of Psychiatry, Washington University School of Medicine St. Louis, Missouri, United States, 63110,Department of Neurology, Washington University School of Medicine St. Louis, Missouri, United States, 63110,Department of Radiology, Washington University School of Medicine St. Louis, Missouri, United States, 63110
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50
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Nod-like receptor protein 1 inflammasome mediates neuron injury under high glucose. Mol Neurobiol 2013; 49:673-84. [PMID: 24014157 DOI: 10.1007/s12035-013-8551-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 08/27/2013] [Indexed: 12/17/2022]
Abstract
Diabetic encephalopathy is one of the most common complications of diabetes. Inflammatory events during diabetes may be an important mechanism of diabetic encephalopathy. Inflammasome is a multiprotein complex consisting of Nod-like receptor proteins (NLRPs), apoptosis-associated speck-like protein (ASC), and caspase 1 or 5, which functions to switch on the inflammatory process and the release of inflammatory factors. The present study hypothesized that the formation and activation of NLRP1 inflammasome turns on neuroinflammation and neuron injury during hyperglycemia. The results demonstrated that the levels of interleukin-1 beta (IL-1β) were increased in the cortex of streptozocin (STZ)-induced diabetic rats. The levels of mature IL-1β and IL-18 were also elevated in culture medium of neurons treated with high glucose (50 mM). The expression of three essential components of the NLRP1 inflammasome complex, namely, NLRP1, ASC, and caspase 1, was also upregulated in vivo and in vitro under high glucose. Silencing the ASC gene prevented the caspase-1 activation, and inhibiting caspase 1 activity blocked hyperglycemia-induced release of inflammatory factors and neuron injury. Moreover, we found that pannexin 1 mediated the actvitation of NLRP1 inflammasome under high glucose. These results suggest that hyperglycemia induces neuroinflammation through activation of NLRP1 inflammasome, which represents a novel mechanism of diabetes-associated neuron injury.
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