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Evidence for increased activated metalloproteinase 2 (MMP-2a) expression associated with human prostate cancer

M Stearns1, M E Stearns

  • 1Department of Pathology, Medical College of Pennsylvania, Philadelphia 19129, USA.

Oncology Research
|January 1, 1996
PubMed

Insights

Activated matrix metalloproteinase 2 (MMP-2a) is linked to prostate cancer advancement. Increased MMP-2a expression correlates with higher Gleason scores and lymph node metastasis in prostate cancer patients.

Area of Science:

  • Oncology
  • Biochemistry
  • Molecular Biology

Background:

  • Previous studies suggest a link between matrix metalloproteinase 2 (MMP-2) expression and prostate cancer progression.
  • The expression of enzymatically active MMP-2 (MMP-2a) in prostate cancer and its association with disease progression remain unclear.

Purpose of the Study:

  • To investigate the expression of activated MMP-2 (MMP-2a) in human prostate tissues.
  • To determine if MMP-2a expression is associated with prostate cancer progression and metastasis.

Main Methods:

  • Utilized monoclonal antibodies specific for MMP-2a.
  • Employed SDS-PAGE, Western blots, zymography, and quantitative ELISAs on normal prostate, benign prostatic hyperplasia, and prostate cancer tissue extracts.
  • Analyzed tissues from varying Gleason scores and lymph node metastases.

Main Results:

  • MMP-2a was undetectable in normal prostate, benign prostatic hyperplasia, and low Gleason score (GS) 4 prostate cancer.
  • MMP-2a was detected in higher GS prostate cancer and lymph node metastases.
  • Levels of both MMP-2 and MMP-2a increased with higher GS; MMP-2a was prominent in metastases while MMP-2 was not.

Conclusions:

  • Significant increases in activated MMP-2 (MMP-2a) are associated with malignant progression in prostate cancer.
  • Elevated MMP-2a levels correlate with tumor cell metastasis to lymph nodes in prostate cancer.

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