alexa Differences in Gene Expression Profiles between Human Breast Tissue and Peripheral Blood Samples for Breast Cancer Detection | OMICS International | Abstract
ISSN: 1948-5956

Journal of Cancer Science & Therapy
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Research Article

Differences in Gene Expression Profiles between Human Breast Tissue and Peripheral Blood Samples for Breast Cancer Detection

Mahesh Kandula1, Kalyana Kumar Ch1*, Ravi Kanth K1, Laxmi Addala VV1, Sudha Murthy2 and YS Ammi Raju1

1Krisani Biosciences Private Limited, Alexandria Incubation Center, Genome Valley, Hyderabad, India

2Indo American Cancer Hospital and Research Centres, Banjara Hills, Hyderabad, India

*Corresponding Author:
Kalyan Kumar Ch
Krisani Biosciences Private Limited
Alexandria Incubation Center
Genome Valley, Hyderabad, India
Tel: 040-23480204
E-mail: [email protected]

Received date: October 12, 2012; Accepted date: October 27, 2012; Published date: October 29, 2012

Citation: Mahesh K, Kalyana Kumar Ch, Ravi Kanth K, Laxmi Addala VV, Sudha Murthy, et al. (2012) Differences in Gene Expression Profiles between Human Breast Tissue and Peripheral Blood Samples for Breast Cancer Detection. J Cancer Sci Ther 4: 379-385. doi: 10.4172/1948-5956.1000171

Copyright: © 2012 Mahesh K, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

The purpose of this study is to check the similarities of differential gene expression of 11 genes in breast cancer tissue and blood samples from the same individual for early detection of breast cancer. We had investigated differential gene expression by qRT-PCR in 20 breast cancer patients’ tumoral tissues and corresponding blood sample. In our analysis BRCA2, HER-2, ER, PR, MET and BRAF mRNA levels were significantly over expressed in tumoral tissues. ER and PR mRNA levels were not detected in any of the peripheral blood samples, whereas KRAS and PTEN mRNA levels were not detected in any of the tumoral tissues. HER-2 (45%), EGFR (40%) and PI3KCA (30%). KRAS and PTEN mRNA levels were significantly over expressed in peripheral blood. In the correlation analysis expression of most of the genes were significantly altered in grade II and III in the tissues, where as in premenopausal women mRNA expression was significantly high in Grade II and III and ER/PR negative tumors. Our results suggests that BRCA2, ER, PR, PI3KCA, MET and BRAF differential gene expression at mRNA levels showed no diagnostic value as a marker of circulating tumour cells in breast cancer. qRT-PCR may be suitable alternative method for the determination of HER-2, EGFR, PI3KCA KRAS and PTEN mRNA status in the blood of breast cancer patients. Premenopausal women with high grade (Grade II and III) and ER/PR negative cases may be associated with proliferation/metastasis, high recurrence rate, and poor prognosis.

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