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Related Experiment Videos

Prostatic specific antigen

A M el-Shirbiny1

  • 1Nuclear Medicine Department, Albert Einstein Medical School, NY, NY 10461.

Advances in Clinical Chemistry
|January 1, 1994
PubMed
Summary
This summary is machine-generated.

Prostate-specific antigen (PSA) is a protein produced by prostate cells. While its use in screening for prostate cancer is limited, PSA is highly valuable for monitoring treatment effectiveness and detecting recurrence.

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Area of Science:

  • Biochemistry
  • Oncology
  • Urology

Background:

  • Prostate-specific antigen (PSA) is a glycoprotein produced by prostatic epithelial cells.
  • It functions as a serine protease and is involved in seminal fluid liquefaction.
  • PSA production is regulated by androgens and its gene expression is androgen-dependent.

Purpose of the Study:

  • To review the characteristics and clinical utility of Prostate-Specific Antigen (PSA).
  • To evaluate PSA's role in prostate cancer screening, staging, and post-treatment monitoring.
  • To compare PSA with other prostate cancer markers like PAP.

Main Methods:

  • Literature review of studies on PSA.
  • Analysis of PSA's biochemical properties and biological functions.

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  • Evaluation of clinical data regarding PSA levels in various prostate conditions and treatment scenarios.

    • Main Results:

    • PSA levels can be elevated by various factors including prostatitis, biopsy, and BPH, limiting its screening utility.
    • PSA shows a correlation with pathological stage but has overlap, limiting its role in staging.
    • PSA is highly sensitive and specific for monitoring treatment response and detecting recurrence post-therapy, outperforming PAP.

    Conclusions:

    • PSA's primary clinical utility lies in post-treatment monitoring for residual disease or recurrence.
    • Despite limitations in screening and staging, PSA is a precise and meaningful marker for prostate cancer.
    • Advancements in assays and standardization could further enhance PSA's role as a tumor marker in cancer biology.