Abstract
The present study investigated the antioxidant and cyto-/mito-protective roles of Methanol Fraction of Ficus mucoso (MFFM) in iron-induced oxidative damage in Drosophila melanogaster. At first, 10-day survival rates were carried out separately on FeSO4 and MFFM, respectively, after which ameliorative effects of MFFM were investigated on FeSO4-induced toxicity for 5 days using biochemical and behavioral markers. Additionally, mitochondria were isolated from treated D. melanogaster to assess mitochondrial Permeability Transition (mPT) pore opening. The results showed that FeSO4 significantly reduced survival rate, total thiol level and activities of catalase and glutathione-S-transferase in D. melanogaster. In addition, treatment with FeSO4 caused increased generation of H2O2, NO (nitrite/nitrates) and acetylcholinesterase (AChE) activity compared with control (p < 0.05). Conversely, MFFM restored FeSO4-induced inhibition of glutathione-S-transferase and catalase activities, as well as glutathione and total thiol levels. FeSO4-induced elevation of AChE activity as well as H2O2 and NO (nitrites/nitrates) levels were ameliorated by MFFM with improved climbing activity. Interestingly, MFFM prevented FeSO4-induced mitochondrial Permeability Transition (mPT) pore opening, and elevated mitochondrial ATPase activity and mitochondrial lipid peroxides generation in D. melanogaster. Taken together, our results demonstrated that iron impaired anti-stress defence capacity, altered behavioral functions, increased generation of mitochondrial malondialdehyde and activated opening of the mPT pore in D. melanogaster. Conversely, methanol fraction of F. mucoso protected against iron-induced cyto-/mito-toxic effects. F. mucoso possibly contain bioactive agents which might be useful in the management of disorders associated with oxidative stress induced by iron and or related metals.
