Abstract
The DNA-dependent protein kinase (DNA-PK) consists of a heterodimer DNA-binding complex, Ku70 and Ku80, and a large catalytic subunit, DNA-PKcs. To examine the role of DNA-PKcs in lymphocyte development, radiation sensitivity, and tumorigenesis, we disrupted the mouse DNA-PKcs by homologous recombination. DNA-PKcs -null mice exhibit neither growth retardation nor a high frequency of T cell lymphoma development, but show severe immunodeficiency and radiation hypersensitivity. In contrast to the Ku70−/− and Ku80−/− phenotype, DNA-PKcs -null mice are blocked for V(D)J coding but not for signal-end joint formation. Furthermore, inactivation of DNA-PKcs leads to hyperplasia and dysplasia of the intestinal mucosa and production of aberrant crypt foci, suggesting a novel role of DNA-PKcs in tumor suppression.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 10:44 a.m.) |
Deposited | 3 years, 4 months ago (April 13, 2022, 5:53 p.m.) |
Indexed | 1 month, 3 weeks ago (July 2, 2025, 3:07 p.m.) |
Issued | 26 years, 6 months ago (Feb. 16, 1999) |
Published | 26 years, 6 months ago (Feb. 16, 1999) |
Published Online | 26 years, 6 months ago (Feb. 16, 1999) |
Published Print | 26 years, 6 months ago (Feb. 16, 1999) |
@article{Kurimasa_1999, title={Catalytic subunit of DNA-dependent protein kinase: Impact on lymphocyte development and tumorigenesis}, volume={96}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.96.4.1403}, DOI={10.1073/pnas.96.4.1403}, number={4}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Kurimasa, Akihiro and Ouyang, Honghai and Dong, Li-jin and Wang, Sa and Li, Xiaoling and Cordon-Cardo, Carlos and Chen, David J. and Li, Gloria C.}, year={1999}, month=feb, pages={1403–1408} }