European Journal of Anatomy

Official Journal of The Spanish Society of Anatomy
Cover Volume 24 - Number 5
Eur J Anat, 24 (5): 343-356 (2020)

Memory state and hippocampal histomorphology in Wistar rat following monosodium glutamate-induced neurotoxicity; role of aqueous extract of Aloe Barbadensis

Olugbenga Ayannuga1,2, Sinmidele Bamigboye1, Ayodeji Abijo1

1Department of Anatomy and Cell Biology, Obafemi Awolowo University, Ile Ife, Nigeria, 2School of Anatomical Sciences, University of Witwatersrand, South Africa

ABSTRACT This study assessed the effect of varying doses of aqueous extract of Aloe barbadensis on the cel-lular changes of hippocampal cells, oxidative and memory state of Wistar rats following monosodium glutamate-induced neurotoxicity.Eighty Wistar rats (8 weeks) were randomly as-signed into 4 groups of 20 rats; Group 1 received 3 mL/kg of distilled water. Groups 2, 3 and 4 re-ceived 3 g/kg/day of MSG. In addition, groups 3 and 4 received 100 and 200 mg/kg/day of AB ex-tract respectively. Administration was done orally for 28 days in all groups. Five rats per group were sacrificed weekly over a 4-week period. Memory was assessed using radial arm maze on the last day of administration. Following brain harvest, one cerebral hemisphere was homogenized for oxida-tive state assessment, while the other was fixed in 10% neutral buffered formalin and stained with H&E for hippocampal histomorphology. Data ob-tained were analyzed using student t-test and p value < 0.05 was considered significant.Across the 4-week period, group 2 rats showed significant increase in time spent to identify baited arms, significant reduction in density of apparentlynormal neurons and oligodendrocyte in CA 1-3 regions of hippocampus, and significant increase in reduced glutathione when compared with other groups. However, no significant differences were noted between groups 1, 3 and 4 for the above stated parameters.The study concluded that MSG caused hippo-campal neuronal and oligodendrocytes degenera-tion and impairment of memory. These anomalies are prevented by 100 and 200 mg/kg of Aloe bar-badensis.

Keywords: Hippocampus Monosodium gluta-mate Memory Neuron Oligodendrocyte Oxidative stress

European Journal of anatomy
ISSN 2340-311X (Online)