Neuroprotective role of Convolvulus pluricaulis on aluminium induced neurotoxicity in rat brain

Aim of the study: Convolvulus pluricaulis (Convolvulaceae) has long been used as traditional herbal medicine in India as nerve tonic. We investigated neuroprotective effects of aqueous extract from Canvolvulus pluricaulis (CP) against aluminium chloride induced neurotoxicity in rat cerebral cortex. Material, method and result: Daily administration of CP (150 mg/kg) for 3 months along with aluminium chloride (50 mg/kg) decreased the elevated enzymatic activity of acetylcholine esterase and also inhibited the decline in Na+/K+ ATPase activity which resulted from aluminium intake. Beside, preventing accumulation of lipid and protein damage, changes in the levels of endogenous antioxidant enzymes associated with aluminium administration were also rectified. Oral administration of CP preserved the mRNA levels of muscarinic receptor 1 (M1 receptor), choline acetyl transferase (ChAT) and Nerve Growth Factor-Tyrosine kinase A receptor (NGF-TrkA). It also ameliorated the upregulated protein expression of cycline dependent kinase5 (Cdk5) induced by aluminium. The potential of CPE to inhibit aluminium induced toxicity was compared with rivastigmine tartrate (I mg/kg), which was taken as standard. The potential of the extract to prevent aluminium-induced neurotoxicity was also reflected at the microscopic level, indicative of its neuroprotective effects. Conclusion: Convolvulus pluricaulis possesses neuroprotective potential, thus validating its use in alleviating toxic effects of aluminium. (C) 2009 Elsevier Ireland Ltd. All rights reserved.