Isaac Paul Emeje, Nkiruka Rose Ukibe*, Charles Chinedum Onyenekwe and Nwakasi K Nnamah
Background: Prostate disorders (prostatitis, BPH and Pca) can contribute to renal impairment. Benign prostatic hyperplasia (BPH) and renal impairment (RI) such as chronic kidney disease are important public health problems in older men. The present study aimed to assess serum levels of prostate specific antigen, urea, creatinine, protein and uric acids in subjects with BPH at Federal Medical Center, Lokoja, Kogi State, Nigeria. A population-based sample of one hundred and ten (110) men aged (51-70) years were conveniently recruited and divided into three groups designation A= BPH with RI, (n=35) B=BPH without RI, (n=35) and C=Control, (n=40).
Methods: Blood samples were collected from all the participants and serum separated and stored at -20Ã?Å¡C until analyzed for prostate specific antigen using Enzyme Linked Immunosorbent Assay (ELISA) and colorimetric assay method for creatinine, urea, protein and uric acid. Data were analyzed using SPSS software application (version 17.0). Pearson correlation and Receiving Operating Characteristics of the groups were done.
Results: The result showed that urea and creatinine levels were significantly higher in BPH subjects with or without renal impairment when compared with controls (p<0.05 respectively). Similarly, total prostate specific antigen (tPSA), free prostate specific antigen (fPSA), complex prostate specific antigen (cPSA) and percent free prostate specific antigen (%fPSA) were significantly higher in BPH subjects with or without RI when compared with controls (p<0.05 respectively). Urea, creatinine and uric acid were significantly higher while total protein was significantly lower in BPH with RI when compared with BPH without RI (p<0.05 respectively).
Conclusion: The significantly higher urea, creatinine and uric acid levels in BPH subjects showed that BPH subjects with RI may have decrease excretion and accumulation of uric acid by the kidney suggesting possible risk of progression to CKD while BPH subjects without RI tends to be more prone to developing renal dysfunction. The significant correlation between %fPSA, creatinine and urea shows an association between BPH and renal diseases. Using receiving operating characteristic (ROC) curves to assess diagnostic performance of various parameters in various groups for the prediction of BPH with or without renal disease, there was evidence that fPSA and %fPSA have higher predictive value in the diagnosis of BPH while uric acid, urea, creatinine and protein have higher predictive value in the diagnosis of renal disease. It is therefore, recommended that people with prostate disorders should be screened for renal diseases and vice versa.
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