title: The impact of HMG-CoA reductase therapy on serum PSA.
abstract: BACKGROUND
  3-hydroxy-3-methyl-glutaryl-CoA (HMG-CoA) reductase inhibitors, otherwise known as statins, inhibit the enzyme that controls the conversion of HMG-CoA to mevalonate, a precursor for cholesterol. Statins may be important to prostate cancer biology by inhibiting cell growth, inflammation, and oxidative stress. The purpose of this study was to assess the influence of statin therapy on serum prostate-specific antigen (PSA) levels.
  
  
  METHODS
  The computerized medical records at the University of Rochester Medical Center were used to identify men who filled statin prescriptions between May 31st, 2008 and September 30th, 2008. Men with at least one PSA assay performed within 2 years before and at least one PSA assay performed within 1 year after starting a statin medication were included. The primary endpoint was the change in PSA concentration computed as the difference between PSA levels before and after starting a statin medication. Paired t-tests were used to analyze the mean differences in PSA values.
  
  
  RESULTS
  A total of 962 patients were identified. The mean difference in serum PSA level after statin administration was -0.29 ng/ml (-8.04%). Subgroup analyses for mean PSA concentration change before and after statin administration by age group revealed: 50-59 years old (-0.1609, 95% CI: -0.2444, -0.0775, P < 0.0002), 60-69 years old (-0.3393, 95% CI: -0.4641, -0.2145, P < 0.0001), and >70 years old (-0.351, 95% CI: -0.490, -0.212, P < 0.0001).
  
  
  CONCLUSIONS
  These observations suggest a statistically significant reduction in serum PSA level that is associated with the onset of statin therapy.
authors.affiliation: Department of Urology, University of Rochester/Strong Memorial Hospital, Rochester, New York, USA. david.mener@gmail.com
authors.forename: David J
authors.initials: DJ
authors.lastname: Mener
authors.forename: Angelo
authors.initials: A
authors.lastname: Cambio
authors.forename: David G
authors.initials: DG
authors.lastname: Stoddard
authors.forename: Brad A
authors.initials: BA
authors.lastname: Martin
authors.forename: Ganesh S
authors.initials: GS
authors.lastname: Palapattu
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003627:Data Interpretation, Statistical; D004305:Dose-Response Relationship, Drug; D023381:Endpoint Determination; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000494:pharmacology*; D008297:Male; D008875:Middle Aged; D017430:Prostate-Specific Antigen / Q000097:blood*; D012189:Retrospective Studies
chemical_list: D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D017430:Prostate-Specific Antigen