Modulation of biochemical parameters by Hemidesmus indicus in cumene hydroperoxide-induced murine skin: possible role in protection against free radicals-induced cutaneous oxidative stress and tumor promotion.
Hemidesmus indicus has been shown to possess significant activity against immunotoxicity and other pharmacological and physiological disorders. In this communication, we have shown the modulating effect of H. indicus on cumene hydroperoxide-mediated cutaneous oxidative stress and tumor promotion response in murine skin. Cumene hydroperoxide treatment (30 mg per animal) increased cutaneous microsomal lipid peroxidation and induction of xanthine oxidase activity which are accompanied by decrease in the activities of cutaneous antioxidant enzymes and depletion in the level of glutathione. Parallel to these changes a sharp decrease in the activities of phase II metabolizing enzymes was observed. Cumene hydroperoxide treatment also induced the ornithine decarboxylase activity and enhanced the [3H]-thymidine uptake in DNA synthesis in murine skin. Application of ethanolic extract of H. indicus at a dose level of 1.5 and 3.0mg/kg body weight in acetone prior to that of cumene hydroperoxide treatment resulted in significant inhibition of cumene hydroperoxide-induced cutaneous oxidative stress, epidermal ornithine decarboxylase activity and enhanced DNA synthesis in a dose-dependent manner. Enhanced susceptibility of cutaneous microsomal membrane for lipid peroxidation and xanthine oxidase activity were significantly reduced (P<0.01). In addition the depleted level of glutathione, inhibited activities of antioxidants and phase II metabolizing enzymes were recovered to significant level (P<0.05). In summary, our data suggest that H. indicus is an effective chemopreventive agent in skin and capable of ameliorating hydroperoxide-induced cutaneous oxidative stress and tumor promotion.
Sultana
Sarwat
S
Section of Chemoprevention and Nutrition Toxicology, Department of Medical Elementology and Toxicology, Faculty of Science, Jamia Hamdard (Hamdard University), New Delhi 110062, India. sarwat786@rediffmail.com
Khan
Naghma
N
Sharma
Sonia
S
Alam
Aftab
A
D000818:Animals; D016588:Anticarcinogenic Agents / Q000494:pharmacology*; D000975:Antioxidants / Q000378:metabolism; D001555:Benzene Derivatives / Q000633:toxicity*; D004247:DNA / Q000096:biosynthesis; D005260:Female; D005609:Free Radicals / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D031102:Hemidesmus; D015227:Lipid Peroxidation / Q000187:drug effects; D051379:Mice; D008861:Microsomes / Q000378:metabolism; D016660:NAD(P)H Dehydrogenase (Quinone) / Q000378:metabolism; D009955:Ornithine Decarboxylase / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects*; D010936:Plant Extracts / Q000494:pharmacology; D012867:Skin / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D014969:Xanthine Oxidase / Q000378:metabolism
D016588:Anticarcinogenic Agents; D000975:Antioxidants; D001555:Benzene Derivatives; D005609:Free Radicals; D010936:Plant Extracts; D004247:DNA; D014969:Xanthine Oxidase; D016660:NAD(P)H Dehydrogenase (Quinone); D005982:Glutathione Transferase; D009955:Ornithine Decarboxylase; D005978:Glutathione; C007164:cumene hydroperoxide