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[5ARI and PSA: open questions.]

Andrea Tubaro1, Federica Puccini, Cosimo De Nunzio

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Serum prostate specific antigen (PSA) testing accuracy for prostate cancer diagnosis is maintained, even increased, in patients taking 5-alpha reductase inhibitors (5ARI). These findings address concerns about PSA test reliability during BPH treatment.

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Area of Science:

  • Urology
  • Oncology
  • Pharmacology

Background:

  • Serum prostate specific antigen (PSA) has limitations as a sole diagnostic marker for prostate cancer.
  • Factors like benign prostatic hyperplasia (BPH), aging, and inflammation can affect PSA levels.
  • Clinical trials like PCPT and REDUCE highlight a correlation between PSA levels and prostate cancer risk.

Purpose of the Study:

  • To evaluate the predictive value of serum PSA for prostate cancer diagnosis in patients treated with 5-alpha reductase inhibitors (5ARI).
  • To address concerns regarding the accuracy of PSA testing in patients undergoing treatment for lower urinary tract symptoms (LUTS) due to BPH with 5ARI medications like finasteride and dutasteride.

Main Methods:

  • Analysis of clinical trial data focusing on patients treated with 5-alpha reductase inhibitors (5ARI).
  • Assessment of PSA levels and their correlation with prostate cancer diagnosis during 5ARI therapy.
  • Review of studies on the pharmacological treatment of LUTS associated with BPH.

Main Results:

  • 5-alpha reductase inhibitors (finasteride and dutasteride) significantly decrease serum PSA levels by approximately 50%.
  • Despite the decrease, PSA testing accuracy for prostate cancer diagnosis is maintained and potentially enhanced in patients on 5ARI treatment.
  • Data suggests that PSA testing remains a reliable tool even during 5ARI therapy for BPH.

Conclusions:

  • The accuracy of serum PSA testing for prostate cancer diagnosis is not compromised, but rather improved, in patients using 5-alpha reductase inhibitors (5ARI).
  • Concerns about PSA test reliability during 5ARI treatment for BPH are addressed, indicating PSA remains a valuable diagnostic marker.
  • The question of PSA accuracy during 5ARI treatment is considered resolved based on available clinical trial evidence.