Journal of Carcinogenesis & Mutagenesis

Wen-Hsing Cheng

Publications

• Research Article
  Effect of Nicotine-free Tobacco Extract on DNA Damage Responses in Cancerous and Non-cancerous Cells
  Author(s): Ying Yu, Pavan K Soma, Y Martin Lo, Cheng-I Wei and Wen-Hsing ChengYing Yu, Pavan K Soma, Y Martin Lo, Cheng-I Wei and Wen-Hsing Cheng
  
  The use of cigarette products tags tobacco as a crop with serious health concerns, but nutraceutical potentials of tobacco constituents other than nicotine have not been adequately explored. The objective of this study was to investigate the effect of nicotine-free tobacco extract on the activation of tumorigenesis barriers. Four lines of human cells were treated with a nicotine-free tobacco extract (0.1 and 1 mg/mL, 0-48 h). MRC-5 and CCD841 non-cancerous cells treated with the tobacco extract showed hypersensitivity, apoptosis and cell cycle arrest in S and G2/M phases, and induction of DNA damage response as evidenced by phosphorylation of ataxia telangiectasia mutated at Ser- 1981 and histone H2A.X at Ser-139. In contrast, HCT 116 cancerous cells, with or without functional DNA mismatch repair, were resistant to the tobacco extract treatment. These results suggest that tobacco com.. View More»
  DOI: 10.4172/2157-2518.S3-002

  Abstract PDF