PMID: 11323390Apr 27, 2001Paper

Reduced DNA-dependent protein kinase activity is associated with lung cancer

Carcinogenesis
D H AuckleyS A Belinsky

Abstract

Reduced DNA repair capacity of carcinogen-induced DNA damage is now thought to significantly influence inherent susceptibility to lung cancer. DNA-dependent protein kinase (DNA-PK) is a serine-threonine kinase activated by the presence of double-strand breaks in DNA that appears to play a major role in non-homologous recombination and transcriptional control. The purpose of this study was to determine whether DNA-PK activity varies among individuals and how this affects lung cancer risk. DNA-PK activity in peripheral mononuclear cells from individuals with lung cancer (n = 41) was compared with lung cancer-free controls (n = 41). Interindividual variability was seen within each group, however, significant differences (P = 0.03) in DNA-PK activity between cases and controls were seen when comparing the distribution of enzyme activity among these two groups. The percentages of cases and controls with DNA-PK activity in the ranges 2.5-5.0 and 7.6-10.0 units were 39 versus 20% and 7 versus 29%, respectively. The enzyme activity in peripheral mononuclear cells reflected that seen in bronchial epithelial cells, one progenitor cell for lung cancer, supporting the use of peripheral mononuclear cells for larger population-based studies ...Continue Reading

Citations

Apr 25, 2003·Lung Cancer : Journal of the International Association for the Study of Lung Cancer·Lasse Tengbjerg HansenMogens Spang-Thomsen
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