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Lack of mutations in DNA polymerase beta of estradiol-induced hamster kidney tumors: sequence of hamster DNA polymerase beta cDNA.

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We examined the effects of estradiol (E2), the natural estrogenic hormone, on the structure and expression of DNA polymerase beta (DNA pol beta), a DNA repair gene, from E2-induced primary kidney tumors of twelve Syrian hamsters, their metastases, and from kidney tissues surrounding the tumors. We sequenced the coding region of the hamster DNA pol beta and found it to differ from that of the human by 11%. No mutations were detected in the entire coding region including the catalytic domain of the DNA pol beta from E2-induced primary kidney tumors, their metastases, or from kidney tissues surrounding the tumors. The expression of the DNA pol beta mRNA was also not significantly altered in E2-induced kidney tumors or in kidney tissues surrounding the tumors compared to that of control kidney tissues. These results suggest that mutations in the DNA pol beta gene may not be involved in the induction or malignant progression of hamster kidney tumors induced by E2. The nucleotide sequence of the hamster DNA pol beta described here will be useful for the study of the structure and expression of this gene.
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Document Type: Research Article

Affiliations: Stehlin Foundation for Cancer Research, Houston, TX 77003, USA.

Publication date: January 1, 1999

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  • The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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