The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Specificity of growth inhibition of melanoma by 4-hydroxyanisole.

An experimental study using human melanoma (NEL-MI), rat hepatoma (Fu5-5), and human kidney (293-31) cell lines was undertaken in order to evaluate the antitumor activity of 4-hydroxyanisole (4-OHA) in vitro. Prior reports have indicated highly specific antitumor activity of 4-OHA against melanoma cells in vitro. This specific antitumor activity has been proposed to be due to the oxidation of 4-OHA by tyrosinase to cytotoxic oxidation products. Dose-dependent cytotoxicity was observed when cells were cultured for 72 h in the presence of 4-OHA. At 100 microM, 4-OHA produced growth inhibition of 62%, 32%, and 55% in melanoma, hepatoma, and kidney cell lines, respectively. No effect was seen at 10 microM 4-OHA. 1,000 microM 4-OHA produced 100% kill. Tyrosinase activity was detected only in melanoma cells. The effect of 100 microM 4-OHA on the incorporation of 3H DNA precursors in melanoma, hepatoma, and kidney cells was also studied. Thymidine incorporation was inhibited in all three cell lines at the lowest cell density tested, with the greatest inhibition seen on melanoma cells. As cell density increased, the effect of 4-OHA on thymidine incorporation decreased. With respect to RNA synthesis, 4-OHA significantly reduced the incorporation of uridine in all three cell lines, with the greatest effect in melanoma cells. Cell density also affected the inhibition of uridine incorporation, but to a lesser extent than that observed on thymidine incorporation. The effect of 4-OHA on leucine incorporation was modest and uninfluenced by cell density. Thus, cytotoxicity of 4-OHA may involve two different mechanisms.(ABSTRACT TRUNCATED AT 250 WORDS)[1]


  1. Specificity of growth inhibition of melanoma by 4-hydroxyanisole. Kulkarni, G.A., Nathanson, L. Pigment Cell Res. (1989) [Pubmed]
WikiGenes - Universities