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Related Experiment Videos

Racial differences in cellular composition of benign prostatic hyperplasia.

Y Aoki1, Y Arai, H Maeda

  • 1Department of Urology, Kurashiki Central Hospital, Kurashiki, Japan.

The Prostate
|December 18, 2001
PubMed
Summary

Japanese men with benign prostatic hyperplasia (BPH) have significantly less stromal tissue and more glandular lumen compared to Caucasian-American and African-American men. These differences in BPH cellular composition may explain racial variations in prostate-specific antigen (PSA) levels and BPH incidence.

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Area of Science:

  • Urology
  • Pathology
  • Racial Health Disparities

Background:

  • Benign prostatic hyperplasia (BPH) affects men globally, with observed variations in prevalence and clinical presentation across different racial groups.
  • Understanding the underlying cellular differences in BPH tissue is crucial for explaining these disparities.

Purpose of the Study:

  • To compare the distinct cellular compositions of benign prostatic hyperplasia (BPH) tissue among Caucasian-American (CA), African-American (AA), and Japanese (JP) men.
  • To investigate potential correlations between cellular composition and previously reported racial differences in prostate-specific antigen (PSA) levels and BPH incidence.

Main Methods:

  • Prostate biopsy specimens were collected from 15 men in each racial group (CA, AA, JP) with prostate-specific antigen (PSA) levels between 4.1-10.0 ng/mL.

Related Experiment Videos

  • Computer-assisted color imaging was employed for quantitative analysis of stained prostate cores.
  • The percentage area density of stroma (S), epithelium (E), epithelial lumen (L), and glandular component (G = E + L) was determined for each specimen.

    • Main Results:

    • Japanese men exhibited a significantly lower stroma/epithelium (S/E) ratio and stroma/glandular (S/G) ratio compared to Caucasian-American men.
    • Prostate tissue in Japanese men showed a higher proportion of glandular lumen (L) and a lower proportion of stromal component (S) relative to Caucasian-American and African-American men.
    • No significant differences in cellular composition were observed between Caucasian-American and African-American men.

    Conclusions:

    • Significant racial differences exist in the cellular composition of benign prostatic hyperplasia (BPH).
    • Japanese men have a distinct BPH cellular profile characterized by less stroma and more glandular lumen compared to Caucasian-American and African-American men.
    • These observed cellular divergences may contribute to the known racial variations in PSA levels, PSA density, and the clinical incidence of BPH.