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Chapter category: Oncology

p53, BRCA1 and Breast Cancer Chemoresistance

This chapter appears in the following book:

Breast Cancer Chemosensitivity

Edited by: Dihua Yu and Mien-Chie Hung
ISBN: 978-0-387-74037-9
» Get more information about this book at landesbioscience.com «

Chapter authors:
Kimberly A. Scata and Wafik S. El-Deiry


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The tumor suppressor genes p53 and BRCA1 are involved in hereditary as well as sporadic breast cancer development and therapeutic responses. While p53 mutations contribute to resistance to chemo- and radiotherapy, BRCA1 dysfunction leads to enhanced sensitivity to DNA damaging therapeutic agents. The biochemical pathways used by p53 and BRCA1 for signaling tumor suppression involve some cross-talk including repression of BRCA1 transcription by p53 and altered selectivity of p53-dependent gene activation by BRCA1. In this chapter we review clinical and preclinical data implicating p53 and BRCA1 in breast cancer chemosensitivity. We discuss the known signaling pathways downstream of p53 or BRCA1 that contribute to their modulation of therapeutic responses, and we discuss the implications of p53 or BRCA1 mutation in therapeutic design.

Kimberly A. Scata
University of Pennsylvania Medical Center

Wafik S. El-Deiry
University of Pennsylvania School of Medicine

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p53, BRCA1 and Breast Cancer Chemoresistance

Kimberly A. Scata and Wafik S. El-Deiry

The tumor suppressor genes p53 and BRCA1 are involved in hereditary as well as sporadic breast cancer development and therapeutic responses. While p53 mutations contribute to resistance to chemo- and ...


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