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Heat-induced apoptosis in human prostatic stromal cells.

M Brehmer1, I Svensson

  • 1Department of Urology, Huddinge Hospital, Huddinge, Sweden. Marianne.Brehmer@sos.ki.se

BJU International
|February 26, 2000
PubMed
Summary

Moderate heat exposure induces apoptosis, programmed cell death, in human prostatic stromal cells. This finding is relevant for understanding transurethral microwave thermotherapy (TUMT) effects.

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Area of Science:

  • Urology
  • Cell Biology
  • Oncology

Background:

  • Benign prostatic hyperplasia (BPH) is often treated with transurethral microwave thermotherapy (TUMT).
  • TUMT utilizes heat to create necrotic lesions within the prostate adenoma.
  • The specific cellular mechanisms of TUMT's effects on stromal cells require further elucidation.

Purpose of the Study:

  • To investigate whether heat induces apoptosis in benign human prostatic stromal cells.
  • To analyze the cellular response of stromal cells to moderate hyperthermia.

Main Methods:

  • Prostatic stromal cells were isolated and cultured from benign human prostatic tissue.
  • Cell origin was confirmed via immunohistochemical staining and transmission electron microscopy.
  • Cultures were subjected to moderate hyperthermia (47°C for 1 hour), and apoptosis was assessed using light microscopy, transmission electron microscopy, and caspase-3-like activity assays.

Main Results:

  • Heat exposure resulted in a significant increase in apoptosis, with 76% of cells undergoing programmed cell death 24 hours post-treatment.
  • Caspase activity, a marker of apoptosis, was notably increased following heat exposure.
  • Necrosis was observed in only 14% of the cells, indicating apoptosis as the primary cell death pathway.

Conclusions:

  • Moderate hyperthermia effectively induces apoptosis in cultured human prostatic stromal cells.
  • This suggests that apoptosis is a key mechanism by which TUMT may exert its therapeutic effects in BPH.
  • Further research can explore the clinical implications of heat-induced apoptosis in prostate tissue.

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