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Tumor Biology

, Volume 35, Issue 12, pp 12613–12617 | Cite as

Circulating miRNAs 21 and 221 as biomarkers for early diagnosis of prostate cancer

  • Sameh Kotb
  • Ashraf Mosharafa
  • Mona Essawi
  • Heba Hassan
  • Alaa Meshref
  • Ahmed Morsy
Research Article

Abstract

To compare the expression of two promising circulating micro-ribonucleic acids (miRNAs 21 and 221) in patients with prostate cancer to subjects without cancer and to evaluate their potential role as specific noninvasive molecular biomarkers for prostate cancer diagnosis, circulating miRNAs 21 and 221 expression profiles were analyzed in 20 men aged 50–75 years, presenting with lower urinary tract symptoms (LUTSs) and undergoing transrectal ultrasound (TRUS)-guided prostate biopsy based on either elevated serum prostate-specific antigen (PSA) (>4.0 ng/ml) or suspicious digital rectal examination (DRE). The performance of miRNAs 21 and 221 in differentiating prostate cancer from nonmalignant cases was evaluated and compared to DRE and elevated PSA. miRNA 21 was overexpressed in 90 % of group A vs. 10 % of group B, while miRNA 221 was overexpressed in 80 % of group A vs. 20 % of group B (p = 0.001). MiRNA 21 overexpression had the highest performance as a diagnostic test with a sensitivity of 90 % and a specificity 90 % (p = 0.02). No correlations were noted between Gleason score of prostate cancer cases and relative quantity (RQ) 21 (r = −0.355, p = 0.292) or RQ 221 (r = −0.044, p = 0.892). Our study showed that serum miRNAs 21 and 221 expression profiling tests may be used as specific noninvasive molecular biomarkers for prostate cancer diagnosis due to their higher sensitivity and specificity with a high negative predictive value leading to a decrease in the biopsies taken for patients with elevated serum PSA values.

Keywords

miRNAs Prostate neoplasms Diagnosis Biological markers 

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2014

Authors and Affiliations

  • Sameh Kotb
    • 1
  • Ashraf Mosharafa
    • 1
  • Mona Essawi
    • 2
  • Heba Hassan
    • 2
  • Alaa Meshref
    • 1
  • Ahmed Morsy
    • 1
  1. 1.Urology DepartmentCairo UniversityCairoEgypt
  2. 2.Medical Molecular Genetics DepartmentNational Research CentreCairoEgypt

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