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Prostatic growth factor: purification and structural relationship to basic fibroblast growth factor.

M T Story1, J Sasse, S C Jacobs

  • 1Department of Urology, Medical College of Wisconsin, Milwaukee 53226.

Biochemistry
|June 30, 1987
PubMed
Summary
This summary is machine-generated.

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Researchers purified prostatic growth factor (PrGF) from human benign prostatic hyperplasia tissue. This growth factor is related to basic fibroblast growth factor (bFGF) but appears larger.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Urology

Background:

  • Benign prostatic hyperplasia (BPH) is a common condition in aging men.
  • Growth factors play a role in prostatic tissue development and disease.

Purpose of the Study:

  • To isolate and characterize a novel growth factor from human benign prostatic hyperplastic tissue.
  • To investigate the relationship between the purified growth factor and known growth factors like basic fibroblast growth factor (bFGF).

Main Methods:

  • Purification of prostatic growth factor (PrGF) using ammonium sulfate precipitation, heparin affinity chromatography, and cation-exchange chromatography.
  • Characterization of PrGF's molecular weight (17,600 daltons) and isoelectric point (pI 10.2).
  • Immunological assays using antisera against synthetic peptides of bFGF to assess sequence homology.

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Main Results:

  • Successfully purified a basic growth factor, termed PrGF, from BPH tissue.
  • Demonstrated immunological cross-reactivity between PrGF and bFGF, indicating a relationship.
  • Observed that PrGF appears larger than bFGF, suggesting potential N-terminal sequence variations.

Conclusions:

  • A novel growth factor, PrGF, related to bFGF has been identified in human BPH tissue.
  • The observed size difference may be attributed to alkaline extraction conditions and potential protease activity.
  • Further investigation is warranted to elucidate the precise structure and function of PrGF in BPH.