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Fermented seeds of Pentaclethra macrophylla mitigate against memory deficit and restored altered enzymatic activity in the brain of streptozotocin-diabetic rats

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Abstract

Memory deficit has been reported as one of the complications of diabetes. Fermented seeds of Pentaclethra Macrophylla (P. macrophylla) have been used in folklore for the management of metabolic diseases. The research aims to evaluate the impact of diets with the inclusion of the fermented seed of P. macrophylla on memory deficit in diabetic rats and its underlying mechanisms. Before the induction, the rats were subjected to training sessions. Thereafter, streptozotocin (50 mg/kg body weight) was administered to the trained rats via intraperitoneal (i.p). 72 hours after, the rats blood glucose level was checked, rats with blood glucose level greater than 250 mg/dl were selected for the memory index evaluation study. The induced rats were randomly distributed into groups: Normal rats (group 1), untreated diabetic rat (Group 2), acarbose treated diabetic rats (group 3); diabetic rats placed on diet supplemented with fermented seed of P. macrophylla (10 & 20% inclusion) were allotted to group 4 & 5. Then, evaluation of memory retention capacity was performed on the day 14 of the experiment. Thereafter, experimental rats were sacrificed, tissue of interest (brain) was excised, homogenized and homogenates were used for biochemical analysis. The cholinergic, angiotensin-1-converting enzyme (ACE), arginase activity and biomarkers for oxidative stress were significantly altered in untreated diabetic rats when compared with non-diabetes rats. Also, the memory capacity of the diabetic rats was significantly reduced when compared with the non-diabetes rats. Meanwhile, diabetic rats placed on diet with fermented seeds of P. macrophylla (10 & 20% inclusion) exhibited significantly higher memory capacity, lower activity of cholinergic, ACE, arginase activity in relation to untreated diabetic rats while the antioxidant status of the brain was enhanced. Nevertheless, fermented seeds of P. macrophylla ameliorated memory deficit in STZ induced diabetes rats. This gave credence to P. macrophylla nutraceutical potential as claimed in folk medicine.

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Authors and Affiliations

  1. Functional Foods and Nutraceuticals Unit, Department of Biochemistry, Federal University of Technology, Akure, Nigeria

    Odunayo Michael Agunloye & Ganiyu Oboh

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  1. Odunayo Michael Agunloye
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  2. Ganiyu Oboh
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Agunloye Odunayo M: Conceived, designed collect data, analyzed and draft the Manuscript.

Oboh G: Provide logistics and vetting of the draft manuscript.

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Correspondence to Odunayo Michael Agunloye.

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Agunloye, O.M., Oboh, G. Fermented seeds of Pentaclethra macrophylla mitigate against memory deficit and restored altered enzymatic activity in the brain of streptozotocin-diabetic rats. Metab Brain Dis 38, 973–981 (2023). https://doi.org/10.1007/s11011-022-01141-y

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