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Current Cancer Drug Targets

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ISSN (Print): 1568-0096
ISSN (Online): 1873-5576

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Review Article

Role of Genomic Alterations in HER2 Positive Breast Carcinoma: Focus on Susceptibility and Trastuzumab-therapy

Author(s): Heena Singla, Sourav Kalra, Preeti Kheterpal, Vinod Kumar* and Anjana Munshi*

Volume 17, Issue 4, 2017

Page: [344 - 356] Pages: 13

DOI: 10.2174/1568009616666161216094026

Price: $65

Abstract

Background: Breast cancer is the most frequently diagnosed life-threatening malignancy among women, across the globe. HER2 positive is a distinct breast cancer subtype, on account of its unique biology and physiological behavior.

Results: Amplification of HER2 oncogene/polysomy 17 leads to HER2 overexpression that is a significant causal implication in HER2 positive breast cancer. HER2 gene variants, as well as other genes/gene variants, are involved in its overexpression, disease prognosis and in predicting the susceptibility towards HER2 positive breast cancer. Trastuzumab (Herceptin) is the most commonly used therapy for treating patients with HER2 positive status. Genomic alterations are incriminated in the development of trastuzumab-resistance, which influences the response towards trastuzumab-therapy.

Conclusion: In the current review article, we have summarized the genomic alterations that are responsible for overexpression of HER2 and therefore, increased risk of breast cancer. In addition, the gene variants affecting response towards trastuzumab-therapy have also been discussed.

Keywords: Breast cancer, HER2 overexpression, gene variants, genomic alterations, drug resistance, trastuzumab.

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