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342763

Mechanical Allodynia and Thermal Hyperalgesia in Diabetic Mice and Neurodegenerative Changes in the Spinal Cord and Sciatic Nerves: Modulation by Topiramate

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Last updated: 01 Jan 2025

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Abstract

Abstract Background: Diabetes-related pathological alterations in body organs may take place due to immunological reactions and inflammatory/oxidative burden. Aim of Study: The current study aimed to test the neuropro-tective effect of topiramate in an animal model of peripheral di-abetic neuropathy (DN) and test its ability to suppress the spinal cord inflammatory burden and glial reactivity. Material and Methods: The study was carried out in Fac-ulty of Medicine, Suez Canal University, Male adult mice were assigned as vehicle group, DN group (alloxan 180mg/kg, i.p.), DN+topiramate 10-mg/kg and DN+topiramate 30-mg/kg. Mice received topiramate therapy for four weeks then tested for allo-dynia and hyperalgesia. Spinal cord specimens were examined by molecular assays, light microscopic technique and neurofila-ment heavy chain (NEFH) immunostaining Sciatic nerves were examined microscopically. Results: Indicated that DN mice had lower the hotplate la-tency time (0.46-fold of latency to licking) and lower the von-Frey test pain threshold (0.6-fold of filament size). In contrast, treatment with topiramate increased these values. Sciatic nerve showed axonal degeneration, demyelination, loss of some cen-tral axons, and shrunken Schwann cells. Further, spinal cords of DN mice had elevated levels of GFAP (5.6-fold) and lower GAP-43 (0.25-fold), inflammatory cytokines (-3 or 4-fold) and neuronal degeneration with dystrophic neurons. Conclusion: Topiramate produced neuroprotection and increased pain thresholds in mice with DN, suppressed spinal cord inflammation and GFAP but enhanced plasticity as indi-cated by higher GAP-43 protein level. Hence, our study rein-forces topiramate as neuroprotection and suggests it for allevi-ating neuropathic pain.

DOI

10.21608/mjcu.2024.342763

Keywords

GFAP — Mouse diabetic neuropathy — Neurofila, ment — Pain test — Sciatic nerve — Spinal cord

Authors

First Name

FATEN ABBAS , MD.*; HOWAIDA S. ALI, M.D.**

Last Name

DALIA IBRAHIM, M.D.*

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Affiliation

The Department Physiology*, Faculty of Medicine, Suez Canal University and Pharmacology Department**, Faculty of Medicine, Assiut University

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Volume

91

Article Issue

12

Related Issue

46126

Issue Date

2023-12-01

Receive Date

2024-02-23

Publish Date

2024-12-01

Page Start

1,585

Page End

1,599

Print ISSN

0045-3803

Online ISSN

2536-9806

Link

https://mjcu.journals.ekb.eg/article_342763.html

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https://mjcu.journals.ekb.eg/service?article_code=342763

Order

342,763

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Original Article

Type Code

263

Publication Type

Journal

Publication Title

The Medical Journal of Cairo University

Publication Link

https://mjcu.journals.ekb.eg/

MainTitle

Mechanical Allodynia and Thermal Hyperalgesia in Diabetic Mice and Neurodegenerative Changes in the Spinal Cord and Sciatic Nerves: Modulation by Topiramate

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Article

Created At

30 Dec 2024