Abstract

Background: Breast cancer is the most common cancer type among woman. Ion channels are important for different physiologic functions as muscle contraction and hormone secretion. Recently the effect of Transient Receptor Potential (TRP) channels on calcium balance, cell proliferation, cell differantiation, tumor invasion, oncogen regulation and resistance to apoptotic cell death has been demonstrated. Some members of TRP family as TRPV6, TRPM1, TRPM8 and TRPM5 has been directly associated with cancer. The aim of this study is to determine the importance of TRP channels in breast cancer.Methods: Thirty two breast cancer patients were enrolled. Normal breast tissue and breast cancer tissue has been taken from each patient during operation. Tissues has been protected in liquid nitrogen. RNA isolation from tissues was made with RNA isolation kit and cDNA has been derived with reverse transcriptase reaction (PCR) from RNA. Expression of 20 genes containing TRPC, TRPM, TRPV and TRPA genes has been investigated with Biomark Fludigm nano Real Time PCR tool.Results: The expression of TRPM1, TRPC7 and TRPC5 genes has not been observed in normal breast and breast cancer tissues. Compared to normal breast tissue TRPMA1, TRMPV5, TRPM5 and TRPV6 genes expression was at high levels in breast cancer tissues. There was no expression of TRPMA1, TRMPV5, TRPM5 and TRPV6 genes in normal breast tissues.Conclusion: In this study the importance of TRP channels in breast cancer has been evaluated. Expression of genes for regulating the TRP channel proteins could be an important candidate for breast cancer diagnosis and treatment. Especially expression of TRPMA1, TRMPV5, TRPM5 and TRPV6 genes has been determined at high levels in breast cancer tissues. Evaluation of the clinical effects of these genes on breast cancer progression can be used at new researchs for diagnosis and treatment options of breast cancer.

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