Neuroprotective Effects of Heinsia crinita and Coconut Water in a Scopolamine-Induced Alzheimer's Model in Albino Rats: Biochemical Changes, Cellular Health, and Neuronal Activity

Aim: This study aimed to investigate the potential therapeutic effects of Heinsia Crinita and Tender Coconut water (TCW) on Alzheimer's disease, focusing on their phytochemical composition, antioxidant activity, and anti-inflammatory effects. The study aimed to identify potential therapeutic agents for Alzheimer's disease and contribute to the development of more effective and natural treatments for this devastating disorder.

Study Design: The study used a randomized controlled trial design, with six groups: negative control (Group A), positive control (Group B), Donepezil-treated group (Group C), TCW-treated group (Group D), Heinsia Crinita-treated group (Group E) and TCW + Heinsia Crinita-treated group (Group F).

Place and Duration of Study: The study was carried out in the University of Calabar, between February 2022 and January 2024.

Methods: About 30 rats were used for the work. Alzheimer's disease-like neurotoxicity and neurodegeneration was inducee in 25 rats using scopolamine; 1.0 mg/kg, intraperitoneally (i.p.) and then treated with the respective interventions; TCW (2ml/kgBW) and Heinsia Crinita (500mg/kgBW). Histological analysis of the hippocampal tissue was performed using Hematoxylin and Eosin stain and Glial Fibrillary Acid Protein (GFAP) stain. Biochemical assays were conducted to determine Malondialdehyde (MDA) levels and glutathione peroxidase (GPx) activity.

Results: The results of the study showed that Heinsia Crinita may provide greater health benefits than Tender Coconut water due to its higher concentrations of bioactive compounds like alkaloids, flavonoids, and saponins, enhancing its medicinal properties, particularly its antioxidant and anti-inflammatory effects. Scopolamine induced histomorphological, immunochemical, and biochemical alterations. When combined with Tender Coconut water, Heinsia crinita (Group F) shows improved efficacy in reducing inflammation, cellular damage, and oxidative stress compared to Tender Coconut water alone. This combination is also as effective as Donepezil (Group C) in alleviating immunochemical alterations in a scopolamine-induced Alzheimer's model in Wistar rats, marked by reduced astrocyte activation, lower malondialdehyde (MDA) levels, and increased glutathione peroxidase (GPx) activity p < 0.05.

Conclusion: This study suggest that the combination of Heinsia Crinita and Tender Coconut water may serve as a promising therapeutic approach for addressing neurodegenerative conditions like Alzheimer's disease. The enhanced medicinal properties of Heinsia Crinita, particularly its ability to reduce oxidative stress and inflammation, coupled with the nutritional benefits of tender coconut water, could provide a synergistic effect that supports neuronal health and mitigates disease progression. This finding highlights the potential for natural products to be integrated into traditional medicine and modern therapeutic strategies.