Oxidative stress is a result of disruption in the balance between antioxidants and pro-oxidants in which subsequently impacting on redox signaling, causing cell and tissue damages. It leads to a range of medical conditions including inflammation, skin aging, impaired wound healing, chronic diseases and cancers but these conditions can be managed properly with the aid of antioxidants. This review features various studies to provide an overview on how Carica papaya help counteract oxidative stress via various mechanisms of action closely related to its antioxidant properties and eventually improving the management of various oxidative stress-related health conditions. Carica papaya is a topical plant species discovered to contain high amounts of natural antioxidants that can usually be found in their leaves, fruits and seeds. It contains various chemical compounds demonstrate significant antioxidant properties including caffeic acid, myricetin, rutin, quercetin, α-tocopherol, papain, benzyl isothiocyanate (BiTC), and kaempferol. Therefore, it can counteract pro-oxidants via a number of signaling pathways that either promote the expression of antioxidant enzymes or reduce ROS production. These signaling pathways activate the antioxidant defense mechanisms that protect the body against both intrinsic and extrinsic oxidative stress. To conclude, Carica papaya can be incorporated into medications or supplements to help manage the health conditions driven by oxidative stress and further studies are needed to investigate the potential of its chemical components to manage various chronic diseases.
Dengue is a serious health endemic with a prediction that 2.5 billion are at risk of acquiring dengue infection and 50 million are infected yearly. Over the years, tremendous effort has been done to develop potential treatment for dengue infection. However, to no avail, most of the treatment modalities have failed in clinical evaluation and trials. With the lack of treatment for dengue infection, home remedies have been widely used as a belief to relieve the symptoms, one of them is the use of papaya leaf juice. This review provides a recent evidences and research that have been attempted to unravel the mechanism of actions of papaya leaf extract to treat dengue infection. Up to date, there are three main mechanisms that have been proposed, which are the anti-thrombocytopenic, immunomodulatory and anti-viral effect of papaya leaf juice extract.
The current investigation was to examine the antioxidant potential of D.littoralis Nees. (family Acanthaceae) On paracetamol-induced hepatotoxicity in rats. The aerial parts of D.littoralis Nees. The powder was concentratesed with various solvents (PE, EA, and methanol) through Soxhlet concentrates and various crude concentrates utilized for hepatoprotective activity. Hepatotoxicity was induced by paracetamol (2g/kg b.wt.) on the 5th day of the investigational period and given orally. Paracetamol-induced rats to exhibit elevated activities of TBARS and reduction the enzymes levels such as Superoxide dismutase(SOD), catalase(CAD), Glutathione peroxidise (GPx), Glutathione S transferase(GST) and Glutathione (GSH) in liver and kidney. Furthermore, Oral administration of the ethyl acetate concentrates of D.littoralis (200 mg/ kgb.wt.) given rats were major reduction the level of TBARS and also significantly elevated the levels of the enzyme such as Superoxide dismutase(SOD), catalase(CAD), Glutathione peroxidise(GPx), Glutathione S transferase(GST) and Glutathione (GSH) in liver and kidney as compared to other concentrates. Thus, results suggested that ethyl acetate concentrates of D.littoralis could be afford better antioxidant effect against paracetamol-induced hepatotoxicity rats.
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