Antioxidants in Chinese Herbal Medicines: A Biochemical Perspective

Abstract

For Abstract see ChemInform Abstract in Full Text.

Hepatoprotective and antioxidant activity of a mangrove plant Lumnitzera racemosa

“…Oxidative stress is the state of imbalance between the level of antioxidant defence system and production of the oxygen derived species [23] . The increased level of oxygen and oxygen derived species such as superoxide radicals, hydroxyl radicals and peroxide radicals causes the oxidative stress [24] . The in vitro assays such as DPPH radical scavenging assay, superoxide radical scavenging assay, hydroxyl radical scavenging assay, lipid peroxide radical scavenging assay suggest the ability of the L. racemosa leaf extract to reduce the biological oxidative stress [25,26] .…”

Hepatoprotective effect of total flavonoids from Laggera alata against carbon tetrachloride-induced injury in primary cultured neonatal rat hepatocytes and in rats with hepatic damage

“…Increased O 2 concentration and production of oxygen-derived species such as superoxide radical ( O 2 À ), hydroxyl radical (OH ) and hydrogen peroxide cause oxidative stress [21]. DPPH and superoxide radical scavenging activity assays indicated that TFLA and quercetin were capable of scavenging DPPH and superoxide radicals in a dose dependent manner, thus suggesting the ability of TFLA to ameliorate oxidative stress.…”

“…Natural antioxidants including superoxide dismutase, catalase and glutathione peroxidase are depleted accompanied by accumulation of reactive oxygen species. In such a situation, natural products can play an important role in two aspects: enhance the activity of original natural antioxidants and neutralize reactive oxygen species by nonenzymatic mechanisms [21]. Oxidative stress is considered to play a prominent causative role in many diseases including liver damage [22].…”

Comparative in vitro antioxidant potential of different parts of Ipomoea asarifolia, Roemer & Schultes, Guiera senegalensis, J. F. Gmel and Anisopus mannii N. E. Brown

“…A number of these plants from other continents have been reported to exert therapeutic efficacies through their antioxidant activities (Aruoma, 2003;Park, Pezzuto, 2002;Scartezzini, Speroni, 2000;Zhu et al, 2004) Ipomoea asarifolia, Roemer & J.A. Schultes (synonyms: Ipomoea hederifolia) or Morning glory, known in the Hausa language of Nigeria as "Duman Karda" (Kaduna), "Duman ra'afii" (Kano) and "Woba boje" or "Daadi mayo" (Adamawa), is a hairless, succulent perennial weed of the family Convolvulaceae that grows in hydromorphic soils in low lying and inland valleys, streams, and river banks of temperate and tropical countries (Okozie, Agyakwa, 1998).…”

“…A number of these plants from other continents have been reported to exert therapeutic efficacies through their antioxidant activities (Aruoma, 2003;Park, Pezzuto, 2002;Scartezzini, Speroni, 2000;Zhu et al, 2004), but only a few Nigerian and African medicinal plants have been the focus of research (Atawodi, 2005). Ipomoea asarifolia, Roemer & J.A.…”