Majalah Kedokteran Bandung (Dec 2013)
Ekspresi Protein B-RAF Mutan pada Karsinoma Tiroid Papilifer yang Bermetastasis ke Kelenjar Getah Bening Regional
Abstract
gene correlated with the biological characteristic of lymph node progressivity. Mutation of B-RAF will encode mutant B-RAF protein which acts as the central regulator on mytogen activated-pathway kinase (MAPK) pathway in terms of proliferation and dedifferentiation processes. B-RAF gene mutation can be identified at deoxyribosenucleic acid (DNA), ribonucleic acid (RNA) and protein levels. There are still controversies in corelation between B-RAF mutation and regional lymph node metastasis. The purpose of this study was to discover the correlation between mutant B-RAF protein and regional lymph node metastasis on PTC. This is a quantitative observational paired case-control study. The study was conducted at the Surgical Oncology, Head and Neck Division Departement of Surgery and Pathology Anatomy Departement, Faculty of Medicine, Universitas Padjadjaran/Dr. Hasan Sadikin General Hospital Bandung in April 2011–January 2012. The sample consisted of 38 PTC cases with metastasis and 38 control cases without regional lymph node metastasis treated in Dr. Hasan Sadikin Hospital between January 2003–December 2010 which have been selected based on the matching process. Each group was examined using the immunohistochemistry method. Correlation between each dependent and non-dependent variables were tested using McNemar bivariate analysis. The results showed that mutant B-RAF protein have a significant correlation (p=0.023) with lymph node metastasis in PTC. The risk of metastasis in B-RAF mutant group was 5.92 times higher than without mutation. This study also showed that from 76 PTC cases studied, the prevalence of mutant B-RAF was about 65.8% (32 in cases and 18 in control group). In conclusion, there is a correlation between mutant B-RAF protein and regional lymph node metastasis in papillary thyroid carcinoma.
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