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Dwi Nur Indah Sari
Graduate Program in Biomedicine, Faculty of Medicine, Universitas Gadjah Mada
Immunology & microbiology Neuroscience

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The Expression of hsa-miR-155-5p in Plasma Samples Of Breast Cancer Before And After Chemotherapy Meutia Srikandi Fitria; Sofia Mubarika Haryana; Sumadi Lukman Anwar; Teguh Aryandono; Dewi Sahfitri Tanjung; Aprilia Indra Kartika; Risky Oktriani; . Irianianiwati; Dwi Nur Indah Sari
Journal of the Medical Sciences (Berkala Ilmu Kedokteran) Vol 48, No 4 (2016): SUPPLEMENT
Publisher : Journal of the Medical Sciences (Berkala Ilmu Kedokteran)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (93.072 KB) | DOI: 10.19106/JMedScieSup0048042016018

Abstract

Breast cancer has emerged as the most common cancer-related mortality among women worldwide. Therefore, early cancer detection using biomarkers such as microRNA is needed. One of microRNAs that has an important role in breast cancer development is miR-155. Hsa-miR-155-5p is an oncomir that is commonly dysregulated in breast cancer. This study aims to determine the expression of hsa-miR-155-5p in breast cancer patient’s plasma before and after chemotherapy. We collected 64 samples from breast cancer patients admitted to Dr. Sardjito Hospital in Yogyakarta. RNA from plasma was extracted using RNA Isolation Kit miRCURY-Biofluid. cDNA synthesis was performed using cDNA Synthesis kit II and quantification of miR-155-5p using ExiLent SYBR Green master mix (Exiqon). qRT-PCR results were then analyzed with Livak's method and compared (before and after chemotherapy) with t-test. Expression of miR-155-5p in the breast cancer patients’ plasma after chemotherapy was significantly increased (10.59 times) when compared to before chemotherapy (p = 0.001). We concluded that there was upregulated expression of miR-155-5p after chemotherapy than before chemotherapy. There has not been a known, relevant pathway between hsa-miR-155-5p and chemotherapy regimens nor resistance to chemotherapy. Keywords: Breast cancer, plasma, hsa-miR-155-5p, oncomiR, chemotherapy.
Co-Authors . Irianianiwati Anwar, Sumadi Lukman Aprilia Indra Kartika Dewi Sahfitri Tanjung Meutia Srikandi Fitria Risky Oktriani Sofia Mubarika Haryana Teguh Aryandono