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miRNA-21 Serum Evaluation in BPH, Hormone Sensitive Prostate Cancer, and Castrate Resistant Prostate Cancer: Attempt for Diagnostic Biomarker Evaluation

Kurnia Penta Seputra, Basuki Bambang Purnomo, Hani Susianti, Handono Kalim, Athaya Febriantyo Purnomo.


Background: Some of prostate cancer cases could progress to be Castrate Resistant Prostate Cancer (CRPC). However it is still a challenge to early diagnose it since no reliable examination could be done except PSA, which has high variability. It is now known that miRNAs are involved in nearly all inflammatory responses. Several malignancies in humans that specifically express miRNA have been detected and identified. The expression values of miRNA-21 also correlates with the occurrence of resistant castration of prostate cancer and metastases, therefore miRNA-21 is expected to be a biomarker to estimate the progression of cancer. Objective: The purpose of this study was to analyze the expression values and cut-off markers of miRNA-21 as markers of CRPC progression. Methods: This study used a retrospective cohort design with observational analysis. The forty-eight total sample was obtained from serum, then the RT-PCR was performed to obtain expression values of miRNA-21. Data were analyzed using One Way ANOVA to see the difference in the expression values of miRNA-21. Furthermore, to determine the cut-off analysis was carried out using the ROC curve. Results: In the BPH group, an average expression value of miRNA-21 was 33,785±1.80 ng/dL, in the Prostate cancer group the average miRNA-21 was 34.51±1.32 ng/dL, while in the CRPC group, an average miRNA-21 was obtained, reaching to 34.51±1.32 ng/dL. The cut-off value of miRNA-21 from the BPH category was 35.21, PPV = 80%, NPV = 58.3 with a value of p = 0.04. Conclusion: There is a significant difference in the expression values of miRNA-21 between BPH with CRPC and Prostate cancer and CRPC, therefore, miRNA-21 cut-off point is potential to differentiate the diagnosis.

Key words: miRNA-21, biomarker, prostate, cancer, progressivity

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