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Published online: 2024-09-17

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IGF 1, BDNF, and NGF mediate the neuro-modulatory role of stem cells in acrylamide-induced hippocampal toxic changes in rats

Abstract

Background: Acrylamide (ACR), a common industrial chemical, is a strong neurotoxic material. The hippocampus is a brain area of interest mostly affected by Alzheimer’s disease. Mesenchymal stem cells (MSCs) usefulness in various neurological diseases including Alzheimer’s is being debated. In this work, the authors aim to explore the role of MSCs in ACR-induced hippocampal neurodegeneration and elucidate the mediating mechanism.

Materials and methods: For this purpose, ten rats served as control, another ten were injected ACR (i.p. 50 mg/kg/day for 2 weeks), and the last ten rats were injected ACR in addition to MSCs (i.p. 1 × 107 MSCs single injection).

Results: ACR induced neurodegenerative histopathological hippocampal changes and adversely altered hippocampal oxidative stress markers SOD, MDA, and GSH. ACR had induced hippocampal demyelination as detected by silver staining. ACR significantly (P < 0.05) up-regulated the ELISA hippocampal  TNF-alpha and IL-6 and produced microglial & astrocyte activation (as tracked by Iba1 & GFAP immunohistochemistry respectively).  ACR significantly reduced hippocampal PCR gene expression of IGF 1 (insulin growth factor-1), BDNF (brain-derived neurotrophic factor), and NGF (nerve growth factor). MSCs administration had mitigated all the previous deleterious changes.

Conclusions: Acrylamide caused detrimental effects on the hippocampus and demonstrably altered the hippocampal architecture. Bone marrow mesenchymal stem cells offered a promising therapeutic role against these neurotoxic effects of acrylamide, presumably through modulation of IGF 1, BDNF, and NGF gene expressions.

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