Androgen Receptor and ETS-Like Protein-1 Expression of Prostate Cancer Correlates with Gleason Score International Society of Urological Pathology 2014/WHO 2016

Abstract

AIM: Prostate cancer is the second most common and the fifth leading cause of death by cancer in men worldwide now. Grading based on Gleason score is a significant prognostic factor of prostate cancer. Androgen receptor (AR) plays important role in the initiation and progression of prostate cancer. AR signaling pathways in prostate cancer can also promote MAPK/ERK signaling pathways which activate ETS-like protein1 (Elk-1). METHODS: A total of 56 slides and paraffin blocks sampling of prostate cancer by consecutive from Department of Anatomical Pathology in West Sumatera. Hematoxylin and eosin (HE) stained slides were evaluated to review Gleason score, histopathological grading, and WHO grade group based on International Society of Urological Pathology (ISUP) 2014/WHO 2016. Immunohistochemistry staining of AR and Elk-1 was performed to analyze protein expression. RESULTS: Prostate cancers were found in mean age 70.68 ± 7.99 years. The most proportion of prostate cancer was Gleason score 9 (44.64%), histopathological grading poorly differentiated/undifferentiated (76.78%), and WHO grade Group 5 (48.21%). The positive expression AR of tumor cells 39 (69.64%) and Elk-1 34 (60.71%). Statistically, these results showed significant correlations of AR (p = 0.009) and Elk-1 (p = 0.012) with Gleason score. CONCLUSIONS: These results showed complex interactions between AR and Elk-1 initiation and progression of prostate cancer. Both variables indicated a significant correlation with Gleason score so that biomarkers prognostic potentially for prostate cancer.