Vitamin C Research Today is a free monthly online journal that collates and summarizes the latest research about Vitamin C, including details on benefits, dosage, supplements, information. | ||||||||
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The effect of N-acetylcysteine in combination with vitamin C on the activity of ornithine decarboxylase of lung carcinoma cells--In vitro.Vanisree AJ, Shyamaladevi CS Department of Biochemistry, University of Madras, Guindy Campus, Chennai-600025, Tamilnadu, India. vanielango@yahoo.com Ornithine decarboxylase (ODC) is a marker of lung cancer and is a key enzyme in the synthesis of polyamines, which are necessary for the promotion of the growth of malignant cells. This study assesses the dose-dependent effect of N-acetylcysteine (NAC), a chemopreventive agent, in combination with vitamin C (VC) on the activity of ODC in lung carcinoma cell line, NCI-H82. The cells were subjected to supplementation of NAC and VC both individually and in combination at different dosages for 24 h as well as 48 h. The cells were incubated with radiolabeled L-ornithine (14C) after the supplementation of NAC and VC individually as well as in combination. A microprocedure was carried out to estimate the activity of ODC in cells after 24 and 48 h of incubation. The activity which was found to be elevated in control cells was decreased significantly on drug supplementation in dose-dependent fashion. The content of nucleic acids also exhibited similar result and [3H]-thymidine incorporation was also affected by the supplementation. Published 3 July 2006 in Life Sci, 79(7): 654-9.
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