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Doctoral Degrees (Physiology)

Permanent URI for this collectionhttps://hdl.handle.net/10413/7045

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Browsing Doctoral Degrees (Physiology) by Subject "Asiatic acid."

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    Evaluating plasmodium berghei infection influence and asiaticacid administration efficacy in sprague dawley male rats: effects on parasitamia, glucose homeostasis and renal electrolyte handling.
    (2016) Mavondo, Greanious Alfred.; Mabandla, Musa Vuyisele.
    Abstract Introduction: Five human-infecting Plasmodium species orchestrate varied pathophysiology culminating in malaria. Despite being treatable, malaria has high mortality and morbidity in pregnant women and children under five years. Current treatment is hampered by drug resistance, toxicity and failure to address malaria induced pathology directly. Asiatic acid has antioxidant, pro-oxidant, antihyperglycaemiac renoprotective qualities which may be anti-disease properties in malaria. Very little is currently known or reported about these asiatic acid anti-disease perspectives in malaria and therefore require further investigations. The aim of this study was to investigate the influence of asiatic acid administration and malaria infection on parasitaemia suppression, glucose homeostasis, renal function and electrolyte handling in Plasmodium berghei-infected Sprague Dawley male rats. Methods: Three sub-chronic studies and one acute study were conducted. The sub-chronic protocol involved per-oral pre- and post-infection administration of asiatic acid (5, 10, 20 mg/kg) and post-infection transdermal drug delivery system application of asiatic acid (5, 10, 20 mg/kgamidated hydrogel matrix pectin patch). Acute studies included post-infection oral glucose tolerance response to asiatic acid. Influence of asiatic acid on %parasitaemia changes, physicochemical changes, immunological effects of malaria, haematological results of malaria, antioxidant capacity, glucose homeostasis, renal function and renal electrolyte handling were investigated. Results: Asiatic acid suppressed parasitaemia to varying extents with asiatic acid 10mg/kg and 5mg/kg emerging as the most efficacious amongst the three doses by per oral administration and transdermal delivery drug delivery system, respectively. Malaria suppression occurred in both pre-infection and post-infection administration of asiatic acid. Asiatic acid preserved physicochemical parameters, ameliorated haematological effects of malaria, influenced immunological effects of malaria, modulated glucose homeostasis in malaria, protected renal function and electrolyte handling in malaria. Asiatic acid improved glucose tolerance response in acute malarial states. Antioxidant status was also improved in malaria. Conclusions: Asiatic acid displayed chemoprophylactic and chemotherapeutic effects in malaria. Asiatic acid has both glucose homeostatic and renoprotective properties in malaria. The antioxidant characteristics of the amphiphilic asiatic acid seem to exert anti-disease and antiparasitic effects in malaria. Asiatic acid may be used as an antimalarial compound with ability to ameliorate malaria associated pathophysiology.