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Del Grosso A, Carpi S, De Sarlo M, Scaccini L, Colagiorgio L, Alabed HBR, Angella L, Pellegrino RM, Tonazzini I, Emiliani C, Cecchini M. Chronic Rapamycin administration via drinking water mitigates the pathological phenotype in a Krabbe disease mouse model through autophagy activation. Biomed Pharmacother 2024; 173:116351. [PMID: 38422660 DOI: 10.1016/j.biopha.2024.116351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/17/2024] [Accepted: 02/23/2024] [Indexed: 03/02/2024] Open
Abstract
Krabbe disease (KD) is a rare disorder arising from the deficiency of the lysosomal enzyme galactosylceramidase (GALC), leading to the accumulation of the cytotoxic metabolite psychosine (PSY) in the nervous system. This accumulation triggers demyelination and neurodegeneration, and despite ongoing research, the underlying pathogenic mechanisms remain incompletely understood, with no cure currently available. Previous studies from our lab revealed the involvement of autophagy dysfunctions in KD pathogenesis, showcasing p62-tagged protein aggregates in the brains of KD mice and heightened p62 levels in the KD sciatic nerve. We also demonstrated that the autophagy inducer Rapamycin (RAPA) can partially reinstate the wild type (WT) phenotype in KD primary cells by decreasing the number of p62 aggregates. In this study, we tested RAPA in the Twitcher (TWI) mouse, a spontaneous KD mouse model. We administered the drug ad libitum via drinking water (15 mg/L) starting from post-natal day (PND) 21-23. We longitudinally monitored the mouse motor performance through grip strength and rotarod tests, and a set of biochemical parameters related to the KD pathogenesis (i.e. autophagy markers expression, PSY accumulation, astrogliosis and myelination). Our findings demonstrate that RAPA significantly enhances motor functions at specific treatment time points and reduces astrogliosis in TWI brain, spinal cord, and sciatic nerves. Utilizing western blot and immunohistochemistry, we observed a decrease in p62 aggregates in TWI nervous tissues, corroborating our earlier in-vitro results. Moreover, RAPA treatment partially removes PSY in the spinal cord. In conclusion, our results advocate for considering RAPA as a supportive therapy for KD. Notably, as RAPA is already available in pharmaceutical formulations for clinical use, its potential for KD treatment can be rapidly evaluated in clinical trials.
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Affiliation(s)
- Ambra Del Grosso
- Istituto Nanoscienze - CNR, Pisa, Piazza San Silvestro 12, Pisa 56127, Italy; Laboratorio NEST, Scuola Normale Superiore, Piazza S. Silvestro 12, 56127, Pisa, Italy.
| | - Sara Carpi
- Istituto Nanoscienze - CNR, Pisa, Piazza San Silvestro 12, Pisa 56127, Italy
| | - Miriam De Sarlo
- Istituto Nanoscienze - CNR, Pisa, Piazza San Silvestro 12, Pisa 56127, Italy
| | - Luca Scaccini
- Laboratorio NEST, Scuola Normale Superiore, Piazza S. Silvestro 12, 56127, Pisa, Italy
| | - Laura Colagiorgio
- Istituto Nanoscienze - CNR, Pisa, Piazza San Silvestro 12, Pisa 56127, Italy
| | - Husam B R Alabed
- Department of Chemistry, Biology, and Biotechnologies, University of Perugia, Perugia, Italy
| | - Lucia Angella
- Istituto Nanoscienze - CNR, Pisa, Piazza San Silvestro 12, Pisa 56127, Italy
| | | | - Ilaria Tonazzini
- Istituto Nanoscienze - CNR, Pisa, Piazza San Silvestro 12, Pisa 56127, Italy
| | - Carla Emiliani
- Department of Chemistry, Biology, and Biotechnologies, University of Perugia, Perugia, Italy
| | - Marco Cecchini
- Istituto Nanoscienze - CNR, Pisa, Piazza San Silvestro 12, Pisa 56127, Italy.
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Dexmedetomidine alleviates oxidative stress and mitochondrial dysfunction in diabetic peripheral neuropathy via the microRNA-34a/SIRT2/S1PR1 axis. Int Immunopharmacol 2023; 117:109910. [PMID: 37012886 DOI: 10.1016/j.intimp.2023.109910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/06/2023] [Accepted: 02/14/2023] [Indexed: 03/12/2023]
Abstract
OBJECTIVE Dexmedetomidine (Dex) is a highly selective α2-adrenoceptor agonist with sedative, analgesic, sympatholytic, and hemodynamic-stabilizing properties, which plays a neuroprotective role in diabetic peripheral neuropathy (DPN) and diabetes-induced nerve damage. However, the related molecular mechanisms are not fully understood. Therefore, our study explored the mechanism of Dex in DPN using rat and RSC96 cell models. METHODS Sciatic nerve sections were observed under an optical microscope and the ultrastructure of the sciatic nerves was observed under a transmission electron microscope. Oxidative stress was assessed by detecting MDA, SOD, GSH-Px, and ROS levels. The motor nerve conduction velocity (MNCV), mechanical withdrawal threshold (MWT), and thermal withdrawal latency (TWL) of rats were measured. Cell viability, apoptosis, and the changes in the expression of related genes and proteins were examined. Furthermore, the relationship between microRNA (miR)-34a and SIRT2 or SIRT2 and S1PR1 was analyzed. RESULTS Dex reversed DPN-induced decreases in MNCV, MWT, and TWL. Dex alleviated oxidative stress, mitochondrial damage, and apoptosis in both the rat and RSC96 cell models of DPN. Mechanistically, miR-34a negatively targeted SIRT2, and SIRT2 inhibited S1PR1 transcription. The overexpression of miR-34a or S1PR1 or the inhibition of SIRT2 counteracted the neuroprotective effects of Dex in DPN in vivo and in vitro. CONCLUSION Dex alleviates oxidative stress and mitochondrial dysfunction associated with DPN by downregulating miR-34a to regulate the SIRT2/S1PR1 axis.
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Gatica S, Aravena C, Prado Y, Aravena D, Echeverría C, Santibanez JF, Riedel CA, Stehberg J, Simon F. Appraisal of the Neuroprotective Effect of Dexmedetomidine: A Meta-Analysis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1408:163-181. [PMID: 37093427 DOI: 10.1007/978-3-031-26163-3_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
Dexmedetomidine is an adrenergic receptor agonist that has been regarded as neuroprotective in several studies without an objective measure to it. Thus, the aim of this meta-analysis was to analyze and quantify the current evidence for the neuroprotective effects of dexmedetomidine in animals. The search was performed by querying the National Library of Medicine. Studies were included based on their language, significancy of their results, and complete availability of data on animal characteristics and interventions. Risk of bias was assessed using SYRCLE's risk of bias tool and certainty was assessed using the ARRIVE Guidelines 2.0. Synthesis was performed by calculating pooled standardized mean difference and presented in forest plots and tables. The number of eligible records included per outcome is the following: 22 for IL-1β, 13 for IL-6, 19 for apoptosis, 7 for oxidative stress, 7 for Escape Latency, and 4 for Platform Crossings. At the cellular level, dexmedetomidine was found protective against production of IL-1β (standardized mean difference (SMD) = - 4.3 [- 4.8; - 3.7]) and IL-6 (SMD = - 5.6 [- 6.7; - 4.6]), apoptosis (measured through TUNEL, SMD = - 6.0 [- 6.8; - 4.6]), and oxidative stress (measured as MDA production, SMD = - 2.0 [- 2.4; - 1.4]) exclusively in the central nervous system. At the organism level, dexmedetomidine improved behavioral outcomes measuring escape latency (SMD = - 2.4 [- 3.3; - 1.6]) and number of platform crossings (SMD = 9.1 [- 6.8; - 11.5]). No eligible study had high risk of bias and certainty was satisfactory for reproducibility in all cases. This meta-analysis highlights the complexity of adrenergic stimulation and sheds light into the mechanisms potentiated by dexmedetomidine, which could be exploited for improving current neuroprotective formulations.
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Affiliation(s)
- Sebastian Gatica
- Laboratory of Integrative Physiopathology, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile.
- Millennium Institute on Immunology and Immunotherapy, Santiago, Chile.
| | - Cristobal Aravena
- Laboratory of Integrative Physiopathology, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Santiago, Chile
| | - Yolanda Prado
- Laboratory of Integrative Physiopathology, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Santiago, Chile
| | - Diego Aravena
- Laboratory of Integrative Physiopathology, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Santiago, Chile
| | - Cesar Echeverría
- Laboratory of Molecular Biology, Nanomedicine and Genomics, Faculty of Medicine, University of Atacama, Copiapo, Chile
| | - Juan F Santibanez
- Institute for Medical Research, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
- Integrative Center for Biology and Applied Chemistry (CIBQA), Bernardo O'Higgins University, Santiago, Chile
| | - Claudia A Riedel
- Laboratory of Integrative Physiopathology, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Santiago, Chile
| | - Jimmy Stehberg
- Laboratory of Neurobiology, Institute of Biomedical Sciences, Faculty of Medicine and Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
| | - Felipe Simon
- Laboratory of Integrative Physiopathology, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile.
- Millennium Institute on Immunology and Immunotherapy, Santiago, Chile.
- Millennium Nucleus of Ion Channel-Associated Diseases, Universidad de Chile, Santiago, Chile.
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Pan S, Hada SS, Liu Y, Hu C, Zhou M, Zheng S, Xu M, Shi C, Yin S, Xie X. Human Placenta-Derived Mesenchymal Stem Cells Ameliorate Diabetic Neuropathy via Wnt Signaling Pathway. Stem Cells Int 2022; 2022:6897056. [PMID: 36440182 PMCID: PMC9683984 DOI: 10.1155/2022/6897056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 04/27/2022] [Accepted: 05/18/2022] [Indexed: 04/19/2024] Open
Abstract
OBJECTIVES To investigate the effect of placenta-derived mesenchymal stem cells (PMSCs) on diabetic peripheral neuropathy and explore the role of Wnt signaling pathway. METHOD Twenty-seven male db/db mice were randomly categorized into the control group, PMSC group, and PMSC treatment with Wnt inhibitor treatment group. Intervention was initiated in week 22. Thermal stimulation response was determined with a plantar analgesia tester. The mice were sacrificed on 7, 14, and 28 days. The morphology of sciatic nerves was observed by electron microscopy, and the expression of protein gene product (PGP) 9.5, S100β, and Ku80 was detected by immunofluorescence. Bax, β-catenin, and dishevelled1 (DVL1) were detected by western blot. RESULTS Thermal stimulation response was improved in the PMSC group on 14 and 28 days. Compared with the control group, PGP9.5 was increased in the PMSC group, accompanied by a significant increase in the expression of S100β. On the contrary, LGK974 inhibited the effect of PMSCs on thermal stimulation response and the expression of PGP9.5 and S100β. Both PGP9.5 and S100β were correlated with Ku80 in fluorescence colocalization. The myelin sheath of sciatic nerves in the PMSC group was uniform and dense compared with that in the control group. The effects of PMSCs promoting myelin repair were significantly inhibited in the PMSC+LGK974 group. Bax in the PMSC group expressed less than the control group. In contrast, the expressions of β-catenin and DVL1 were higher compared with that in the control group on the 14th and 28th days. The expression of DVL1 and β-catenin was lower in the PMSC+LGK974 group than in the PMSC group. CONCLUSIONS PMSCs improved the symptoms of diabetic peripheral neuropathy, along with the improvement of nerve myelin lesions, promotion of nerve regeneration, and activation of Schwann cells, which might be related to the regulation of Wnt signaling pathway and inhibition of apoptosis.
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Affiliation(s)
- Songsong Pan
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Sushant S. Hada
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yang Liu
- Division of Geriatrics, Tongji Hospital, Tongji University, School of Medicine, Shanghai, China
| | - Chao Hu
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Mengdie Zhou
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shaoqiu Zheng
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Minjie Xu
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Changsheng Shi
- Department of Interventional Therapy, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Shiwu Yin
- Department of Interventional & Vascular Surgery, Hefei Second People's Hospital, Hefei Hospital Affiliated to Anhui Medical University, 1 Guangde Road, Hefei, Anhui Province 230011, China
| | - Xiaoyun Xie
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
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Zhang YZ, Zhou ZC, Song CY, Chen X. The Protective Effect and Mechanism of Dexmedetomidine on Diabetic Peripheral Neuropathy in Rats. Front Pharmacol 2020; 11:1139. [PMID: 32848754 PMCID: PMC7406656 DOI: 10.3389/fphar.2020.01139] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 07/13/2020] [Indexed: 12/15/2022] Open
Abstract
Objective To investigate the role of dexmedetomidine (DEX) in the inhibition of diabetic peripheral neuropathy (DPN) and the protection in the nerve damage. Methods Eighty male Sprague-Dawley (SD) rats were randomly allocated to four groups: the control group (C group), DPN model group (DPN group), DEX-treated group (DEX group), and the yohimbine treated group (YOH group). DPN was induced by intraperitoneal administration of streptozocin (STZ) (35 mg/kg). The body weights, blood glucose level, mechanical withdrawal threshold (MWT), thermal withdrawal latency (TWL), the motor, and sensory nerve conduction velocities (MNCV and SNCV) of sciatic nerve were measured. Then the sciatic nerve was isolated for H&E staining and immunohistochemical staining. The oxidative stress makers such as malondialdehyde (MDA), superoxide-dismutase (SOD), and glutathione peroxidase (GSH-Px) and apoptosis related cytokines such as Bax, Bcl-2, and caspase-3 were estimated. Results There was no significant difference of the blood glucose and body weight among the DPN group, DEX group, and YOH group. H&E staining showed that DEX treatment can ameliorate the damage of sciatic nerve cells. In the DPN group, MWT, TWL, MNCV, and SNCV were significantly reduced compared with the C group (P < 0.05). In DEX group rats, MWT, TWL, MNCV, and SNCV were increased significantly (P < 0.05) compared with the DPN group and YOH group rats. Lower SOD and GSH-Px, and higher MDA were found in the DPN group compared with the C group (P < 0.01), and DEX treatment restored SOD, GSH-px, and MDA activity significantly (P < 0.01). The expression levels of Bax and caspase-3 were increased, while that of Bcl-2 was decreased significantly in the DPN group compared with the C group (P < 0.05). In the DEX group, the expression levels of Bax and caspase-3 were decreased significantly (P < 0.05), while that of Bcl-2 was increased significantly (P < 0.05) compared with the DPN group and the YOH group. Conclusion The results of this study demonstrated that DEX has the inhibitory and protective effects on DPN of rats. This may be associated with its antioxidative and anti-apoptosis responses.
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Affiliation(s)
- Yan-Zhuo Zhang
- Department of Anesthesiology, The Fourth Affiliated Hospital of Guangxi Medical University/Liuzhou Workers' Hospital, Liuzhou, China.,Department of Anesthesiology, China and Heilongjiang Key Laboratory for Anesthesia and Critical Care, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Zhong-Cheng Zhou
- Department of Anesthesiology, China and Heilongjiang Key Laboratory for Anesthesia and Critical Care, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Chun-Yu Song
- Department of Anesthesiology, China and Heilongjiang Key Laboratory for Anesthesia and Critical Care, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xia Chen
- Department of Anesthesiology, The Fourth Affiliated Hospital of Guangxi Medical University/Liuzhou Workers' Hospital, Liuzhou, China
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Hangping Z, Ling H, Lijin J, Wenting Z, Xiaoxia L, Qi Z, Xiaoming Z, Qingchun L, Yiming L, Qian X, Ji H, Bin L, Shuo Z. The Preventive Effect of IL-1beta Antagonist on Diabetic Peripheral Neuropathy. Endocr Metab Immune Disord Drug Targets 2020; 20:753-759. [PMID: 31642797 DOI: 10.2174/1871530319666191022114139] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/26/2019] [Accepted: 10/03/2019] [Indexed: 11/22/2022]
Abstract
Objective:
To investigate the relationship between Interleukin-1beta (IL-1beta) and diabetic
peripheral neuropathy (DPN) using animal models.
Materials:
The rat model of diabetic neuropathy was induced by intraperitoneal injection of a single
dose of streptozotocin (STZ) at 65mg/kg. Diabetic rats were randomly divided into two groups (10
each), one treated with 0.9% saline (DMS group) and the other with interleukin-1 receptor antagonist
(IL-1RA) at 50mg/kg (DMI group) twice a day for 5 weeks. Ten normal rats matched for weight, age
and sex served as normal controls (Con group) and were treated with saline. Morphologic studies of
sciatic nerves were achieved using light and transmission electron microscopy.
Results:
Transmission electron microscopy of the sciatic nerve showed the ultrastructure of myelin and
the axon in the IL-1RA group was highly protected compared to diabetic controls.
Conclusions:
High levels of circulating IL-1beta may be associated with the risk of DPN and anti-IL-1
treatment may provide a potential strategy for the prevention of diabetic neuropathy.
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Affiliation(s)
- Zheng Hangping
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Han Ling
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital, Soochow University 1055# Sanxiang Road, Suzhou, Jiangsu, China
| | - Ji Lijin
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Zhao Wenting
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Liu Xiaoxia
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Zhang Qi
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Zhu Xiaoming
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Li Qingchun
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Li Yiming
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Xiong Qian
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Hu Ji
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital, Soochow University 1055# Sanxiang Road, Suzhou, Jiangsu, China
| | - Lu Bin
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
| | - Zhang Shuo
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University 12# Middle Wulumuqi Road, Shanghai, China
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Abo-Salem OM, Ali TM, Harisa GI, Mehanna OM, Younos IH, Almalki WH. Beneficial effects of (-)-epigallocatechin-3-O-gallate on diabetic peripheral neuropathy in the rat model. J Biochem Mol Toxicol 2020; 34:e22508. [PMID: 32275810 DOI: 10.1002/jbt.22508] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 02/26/2020] [Accepted: 03/26/2020] [Indexed: 11/11/2022]
Abstract
Diabetic neuropathic pain is characterized by spontaneous pain with hyperalgesia and allodynia. We investigated whether (-)-epigallocatechin-3-O-gallate could improve diabetic neuropathic pain development through hypoglycemic, hypolipidemic, antioxidant, and anti-inflammatory effects. Diabetes was induced in rats by streptozotocin (55 mg/kg/once) and treated with (-)-epigallocatechin-3-O-gallate (25 mg/kg/orally/once/daily/5 weeks). Diabetic rats showed an increase in serum levels of glucose, nitric oxide, triglyceride, total cholesterol, and low-density lipoprotein-cholesterol with a decrease in high-density lipoprotein-cholesterol and body weight. Also, there was an elevation in brain malondialdehyde with a marked reduction in brain levels of glutathione, superoxide dismutase, catalase, glutathione peroxidase, and glutathione-S-transferase. Furthermore, diabetic rats showed a clear reduction in plasma levels of insulin and an increase in plasma cytokines (interleukin-6 and tumor necrosis factor-α). Moreover, diabetic rats exhibited hyperalgesia as indicated by a hot plate, tail immersion, formalin, and carrageenan-induced edema tests as well as brain histopathological changes (neuron degeneration, gliosis, astrocytosis, congestion and hemorrhage). (-)-Epigallocatechin-3-O-gallate treatment ameliorated alterations in body weight, biochemical parameters, pain sensation, and histopathological changes in brain tissue. (-)-Epigallocatechin-3-O-gallate offers promising hypoglycemic, hypolipidemic, antioxidant and anti-inflammatory effects, which can prevent the development and progression of diabetic neuropathic pain.
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Affiliation(s)
- Osama Mohamed Abo-Salem
- Department of Pharmacology & Toxicology, Faculty of Pharmacy (Boys), Al-Azhar University, Nasr City, Cairo, Egypt
| | - Tarek Mohamed Ali
- Department of Medical Physiology, Faculty of Medicine, Beni-Suef University, Beni Suef, Egypt.,Department of Medical Physiology, Faculty of Medicine, Taif University, Taif, Saudi Arabia
| | - Gamaleldin Ibrahim Harisa
- Department of Pharmaceutics, Kayyali Chair for Pharmaceutical Industry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.,Department of Biochemistry, College of Pharmacy (Boys), Al-Azhar University, Nasr, Cairo, Egypt
| | - Osama Mahmoud Mehanna
- Department of Medical Physiology, Faculty of Medicine, Taif University, Taif, Saudi Arabia.,Department of Medical Physiology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Ibrahim Hamdy Younos
- Department of Clinical Pharmacology, College of Medicine, Menoufia University, Shebin El-Kom, Egypt
| | - Waleed Hassan Almalki
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
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Dysregulated autophagy as a new aspect of the molecular pathogenesis of Krabbe disease. Neurobiol Dis 2019; 129:195-207. [DOI: 10.1016/j.nbd.2019.05.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 05/08/2019] [Accepted: 05/13/2019] [Indexed: 12/19/2022] Open
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Wang HL, Zhang GY, Dai WX, Shu LP, Wei QF, Zheng RF, Lin CX. Dose-dependent neurotoxicity caused by the addition of perineural dexmedetomidine to ropivacaine for continuous femoral nerve block in rabbits. J Int Med Res 2019; 47:2562-2570. [PMID: 31079512 PMCID: PMC6567711 DOI: 10.1177/0300060519847368] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE This study was designed to evaluate the neurotoxicity of dexmedetomidine combined with ropivacaine for continuous femoral nerve block in rabbits. METHODS Thirty New Zealand rabbits were randomly divided into 5 groups of 6 rabbits each and received a continuous femoral nerve block with saline; 0.25% ropivacaine; or 1, 2, or 3 µg/mL of dexmedetomidine added to 0.25% ropivacaine (Groups A-E, respectively). Sensory and motor function was assessed after the nerve block. The rabbits were anesthetized and killed after 48 hours of a continuous femoral nerve block, and the femoral nerves were removed for light and electron microscopy analyses. RESULTS The behavior scores were highest in Group A at 2 and 6 hours after injection. The scores were higher in Groups B and C than in Groups D and E at these same time points. All groups showed normal pathological tissues in the femoral nerves under optical microscopy. Under electron microscopy, histological abnormalities were observed only in Group E; none of the other groups exhibited pathological abnormalities. Quantitative analysis of the myelin sheath area revealed no significant difference in the axonal area, total area of the myelin sheath, or ratio of the total axonal area to the total area of the myelin sheath in all groups. CONCLUSION The lowest doses of dexmedetomidine (1 and 2 µg/mL) combined with 0.25% ropivacaine for continuous femoral nerve block resulted in no neurotoxic lesions, but the higher dose (3 µg/mL) resulted in neurotoxic lesions in this rabbit experimental model.
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Affiliation(s)
- Hai-Li Wang
- 1 Department of Anesthesiology, Sanmenxia Central Hospital of Henan University of Science and Technology, Sanmenxia Henan, China
| | - Guang-Ying Zhang
- 2 Department of Anesthesiology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Wei-Xin Dai
- 2 Department of Anesthesiology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Li-Pei Shu
- 2 Department of Anesthesiology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Qiu-Feng Wei
- 2 Department of Anesthesiology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Ruo-Fang Zheng
- 3 Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Cheng-Xin Lin
- 2 Department of Anesthesiology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Inam-U-Llah, Shi X, Zhang M, Li K, Wu P, Suleman R, Shahbaz M, Taj A, Piao F. Protective Effect of Taurine on Apoptosis of Spinal Cord Cells in Diabetic Neuropathy Rats. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1155:875-887. [PMID: 31468454 DOI: 10.1007/978-981-13-8023-5_74] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Diabetes mellitus (DM) is a condition characterized by chronic hyperglycemia, which leads to diabetic neuropathy and apoptosis in the spinal cord. Taurine has been found to ameliorate the diabetic neuropathy and control apoptosis in various tissues. However, there are few reports that discuss the direct relationship between spinal cord and anti-apoptotic effect of taurine. In this study, DM was induced in male SD rats with STZ @ 25 mg/Kg of body weight in combination with high fat diet. After 2 weeks, they were divided into four groups as DM: diabetic rats, T1 (0.5%), T2 (1%) and T3 (2%) taurine solution, while control group was non-diabetic rats (no treatment). The results showed that DM increased apoptosis, decreased phosphorylated Akt and Bad. DM decreased expression of Bcl-2 and increased the Bax. Moreover, the release of cytochrome c into cytosol was increased in DM and activation of caspase-3 was also increased. However, taurine reversed all these abnormal changes in a dose dependent manner. Our results suggested the involvement of Akt/Bad signaling pathway and mitochondrial apoptosis pathway in protective effect of taurine against apoptosis in the spinal cord of diabetic rats. Therefore, taurine may be a potential medicine against diabetic neuropathy by controlling apoptosis.
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Affiliation(s)
- Inam-U-Llah
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Xiaoxia Shi
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Mengren Zhang
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Kaixin Li
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Pingan Wu
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Raheel Suleman
- Institute of Food Science and Technology, Chinese Academy of Agricultural Science, Beijing, China
| | - Muhammad Shahbaz
- Department of Food Science and Technology, Muhammad Nawaz Sharif University of Agriculture, Multan, Pakistan
| | - Ayaz Taj
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, China
| | - Fengyuan Piao
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
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11
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Yu ZY, Geng J, Li ZQ, Sun YB, Wang SL, Masters J, Wang DX, Guo XY, Li M, Ma D. Dexmedetomidine enhances ropivacaine-induced sciatic nerve injury in diabetic rats. Br J Anaesth 2018; 122:141-149. [PMID: 30579393 DOI: 10.1016/j.bja.2018.08.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 08/07/2018] [Accepted: 08/12/2018] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Previous studies suggest that dexmedetomidine has a protective effect against local anaesthetic-induced nerve injury in regional nerve blocks. Whether this potentially protective effect exists in the context of diabetes mellitus is unknown. METHODS A diabetic state was established in adult male Sprague-Dawley rats with intraperitoneal injection of streptozotocin. Injections of ropivacaine 0.5%, dexmedetomidine 20 μg kg-1 (alone and in combination), or normal saline (all in 0.2 ml) were made around the sciatic nerve in control and diabetic rats (n=8 per group). The duration of sensory and motor nerve block and the motor nerve conduction velocity (MNCV) were determined. Sciatic nerves were harvested at post-injection day 7 and assessed with light and electron microscopy or used for pro-inflammatory cytokine measurements. RESULTS Ropivacaine and dexmedetomidine alone or in combination did not produce nerve fibre damage in control non-diabetic rats. In diabetic rats, ropivacaine induced significant nerve fibre damage, which was enhanced by dexmedetomidine. This manifested with slowed MNCV, decreased axon density, and decreased ratio of inner to outer diameter of the myelin sheath (G ratio). Demyelination, axon disappearance, and empty vacuoles were also found using electron microscopy. An associated increase in nerve interleukin-1β and tumour necrosis factor-α was also seen. CONCLUSIONS Ropivacaine 0.5% causes significant sciatic nerve injury in diabetic rats that is greatly potentiated by high-dose dexmedetomidine. Although the dose of dexmedetomidine used in this study is considerably higher than that used in clinical practice, our data suggest that further studies to assess ropivacaine (alone and in combination with dexmedetomidine) use for peripheral nerve blockade in diabetic patients are warranted.
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Affiliation(s)
- Z Y Yu
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - J Geng
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Z Q Li
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - Y B Sun
- Department of Anesthesiology and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - S L Wang
- Department of Pathology, Peking University Health Science Center, Beijing, China
| | - J Masters
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - D X Wang
- Department of Anesthesiology and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - X Y Guo
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China
| | - M Li
- Department of Anesthesiology, Peking University Third Hospital, Beijing, China.
| | - D Ma
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK.
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12
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Dexmedetomidine Reduces Diabetic Neuropathy Pain in Rats through the Wnt 10a/ β-Catenin Signaling Pathway. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9043628. [PMID: 30622965 PMCID: PMC6288584 DOI: 10.1155/2018/9043628] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 11/13/2018] [Indexed: 11/25/2022]
Abstract
Diabetic neuropathy pain (DNP), a spontaneous pain with hyperalgesia and allodynia, greatly compromises patients' quality of life. Our previous study suggested that dexmedetomidine (DEX) can relieve hyperalgesia in rats by inhibiting inflammation and apoptosis at the level of the spinal cord. In the present study, we aimed to evaluate the role of Wnt 10a/β-catenin signaling in DEX-induced alleviation of DNP in rats. Forty-eight rats were randomly allocated to four groups (n=12/group): control, DNP, DEX, and yohimbine groups. The DNP model was established by streptozotocin (STZ) injection. The effects of DEX with or without the α2 adrenergic antagonist yohimbine were assessed by behavior tests (mechanical withdrawal threshold and thermal withdrawal latency). Spinal cord tissue was evaluated by immunofluorescence staining of astrocytes as well as for Wnt 10a and β-catenin expression, western blot analysis of Wnt 10a and β-catenin expression, and enzyme-linked immunosorbent assay measurement of proinflammatory cytokines (tumor necrosis factor-α and interleukin-1β). Rats with STZ-induced DNP had a decreased pain threshold, activated astrocytes, increased expression of Wnt 10a and β-catenin, and increased levels of proinflammatory cytokines compared to the control group, and these effects were ameliorated by treatment with DEX. Yohimbine administration partly abolished the protective effects of DEX in the DNP model rats. In conclusion, DEX alleviated DNP in rats by inhibiting inflammation and astrocyte activation, which may be attributed to downregulation of the Wnt 10a/β-catenin signaling pathway.
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13
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Dewanjee S, Das S, Das AK, Bhattacharjee N, Dihingia A, Dua TK, Kalita J, Manna P. Molecular mechanism of diabetic neuropathy and its pharmacotherapeutic targets. Eur J Pharmacol 2018; 833:472-523. [DOI: 10.1016/j.ejphar.2018.06.034] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 06/15/2018] [Accepted: 06/26/2018] [Indexed: 02/07/2023]
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Yu T, Li L, Liu H, Li H, Liu Z, Li Z. KCNQ2/3/5 channels in dorsal root ganglion neurons can be therapeutic targets of neuropathic pain in diabetic rats. Mol Pain 2018; 14:1744806918793229. [PMID: 30027794 PMCID: PMC6088482 DOI: 10.1177/1744806918793229] [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] [Indexed: 12/14/2022] Open
Abstract
Background Diabetic neuropathic pain is poorly controlled by analgesics, and the precise molecular mechanisms underlying hyperalgesia remain unclear. The KCNQ2/3/5 channels expressed in dorsal root ganglion neurons are important in pain transmission. The expression and activity of KCNQ2/3/5 channels in dorsal root ganglion neurons in rats with diabetic neuropathic pain were investigated in this study. Methods The mRNA levels of KCNQ2/3/5 channels were analyzed by real-time polymerase chain reaction. The protein levels of KCNQ2/3/5 channels were evaluated by Western blot assay. KCNQ2/3/5 channel expression in situ in dorsal root ganglion neurons was detected by double fluorescent labeling technique. M current (IM) density and neuronal excitability were determined by whole-cell voltage and current clamp recordings. Mechanical allodynia and thermal hyperalgesia were assessed by von Frey filaments and plantar analgesia tester, respectively. Results The mRNA and protein levels of KCNQ2/3/5 channels significantly decreased, followed by the reduction of IM density and elevation of neuronal excitability of dorsal root ganglion neurons from diabetic rats. Activation of KCNQ channels with retigabine reduced the hyperexcitability and inhibition of KCNQ channels with XE991 enhanced the hyperexcitability. Administration of retigabine alleviated both mechanical allodynia and thermal hyperalgesia, while XE991 augmented both mechanical allodynia and thermal hyperalgesia in diabetic neuropathic pain in rats. Conclusion The findings elucidate the mechanisms by which downregulation of the expression and reduction of the activity of KCNQ2/3/5 channels in diabetic rat dorsal root ganglion neurons contribute to neuronal hyperexcitability, which results in hyperalgesia. These data provide intriguing evidence that activation of KCNQ2/3/5 channels might be the potential new targets for alleviating diabetic neuropathic pain symptoms.
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Affiliation(s)
- Ting Yu
- 1 Department of Anatomy, School of Basic Medical Sciences, Shandong University, Jinan, China.,2 Department of Physiology, Jining Medical University, Jining, China
| | - Lei Li
- 3 Department of Diagnosis, Jining Medical University, Jining, China
| | - Huaxiang Liu
- 4 Department of Rheumatology, Shandong University Qilu Hospital, Jinan, China
| | - Hao Li
- 5 Department of Orthopaedics, Shandong University Qilu Hospital, Jinan, China
| | - Zhen Liu
- 1 Department of Anatomy, School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Zhenzhong Li
- 1 Department of Anatomy, School of Basic Medical Sciences, Shandong University, Jinan, China
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Zhou R, Xu T, Liu X, Chen Y, Kong D, Tian H, Yue M, Huang D, Zeng J. Activation of spinal dorsal horn P2Y 13 receptors can promote the expression of IL-1β and IL-6 in rats with diabetic neuropathic pain. J Pain Res 2018; 11:615-628. [PMID: 29628771 PMCID: PMC5877493 DOI: 10.2147/jpr.s154437] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Objective The dorsal horn P2Y13 receptor is involved in the development of pain behavior induced by peripheral nerve injury. It is unclear whether the expression of proinflammatory cytokines interleukin (IL)-1β and IL-6 at the spinal dorsal horn are influenced after the activation of P2Y13 receptor in rats with diabetic neuropathic pain (DNP). Methods A rat model of type 1 DNP was induced by intraperitoneal injection of streptozotocin (STZ). We examined the expression of P2Y13 receptor, Iba-1, IL-1β, IL-6, JAK2, STAT3, pTyr1336, and pTyr1472 NR2B in rat spinal dorsal horn. Results Compared with normal rats, STZ-diabetic rats displayed obvious mechanical allodynia and the increased expression of P2Y13 receptor, Iba-1, IL-1β, and IL-6 in the dorsal spinal cord that was continued for 6 weeks in DNP rats. The data obtained indicated that, in DNP rats, administration of MRS2211 significantly attenuated mechanical allodynia. Compared with DNP rats, after MRS2211 treatment, expression of the P2Y13 receptor, Iba-1, IL-1β, and IL-6 were reduced 4 weeks after the STZ injection. However, MRS2211 treatment did not attenuate the expression of the P2Y13 receptor, Iba-1, IL-1β, and IL-6 at 6 weeks after the STZ injection. MRS2211 suppressed JAK2 and STAT3 expression in the early stage, but not in the later stage. Moreover, pTyr1336 NR2B was significantly decreased, whereas pTyr1472 NR2B was unaffected in the dorsal spinal cord of MRS2211-treated DNP rats. Conclusion Intrathecal MRS2211 produces an anti-nociceptive effect in early-stage DNP. A possible mechanism involved in MRS2211-induced analgesia is that blocking the P2Y13 receptor downregulates levels of IL-1β and IL-6, which subsequently inhibit the activation of the JAK2/STAT3 signaling pathway. Furthermore, blocking the activation of the P2Y13 receptor can decrease NR2B-containing NMDAR phosphorylation in dorsal spinal cord neurons, thereby attenuating central sensitization in STZ-induced DNP rats.
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Affiliation(s)
- Rui Zhou
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Tao Xu
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - XiaoHong Liu
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - YuanShou Chen
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - DeYing Kong
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Hong Tian
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Mingxia Yue
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Dujuan Huang
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Junwei Zeng
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
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