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Related Experiment Videos

Does captopril have a direct pro-apoptotic effect?

M Buemi1, A Allegra, D Marino

  • 1Department of Internal Medicine, University of Messina, Italy.

Nephron
|January 13, 1999
PubMed
Summary
This summary is machine-generated.

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Angiotensin-converting enzyme (ACE) inhibitors like captopril promote apoptosis in human vascular myocytes. This increased cell death may explain their beneficial effects on cardiovascular remodeling and kidney diseases.

Area of Science:

  • Cardiovascular Science
  • Cell Biology
  • Pharmacology

Background:

  • Hypertension and ischemic heart disease involve cardiovascular remodeling.
  • ACE inhibitors are known to benefit cardiovascular remodeling.
  • The mechanism may involve regulating cell proliferation and death.

Purpose of the Study:

  • To investigate the in vitro effect of captopril on apoptosis in human vascular myocytes.
  • To elucidate the role of apoptosis in the cardiovascular effects of ACE inhibitors.

Main Methods:

  • Human vascular myocytes were treated with captopril (0.23 mM).
  • Apoptosis was assessed using propidium iodide fluorescence analysis.
  • Morphological analysis was performed using the acridine orange technique.

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Main Results:

  • Captopril significantly increased apoptosis by over 3.5-fold at 24 and 48 hours compared to controls.
  • Propranolol enhanced the apoptotic effect of captopril.
  • Quantified apoptosis rates: 7.7% vs. 2% at 24h, and 10.1% vs. 3.8% at 48h.

Conclusions:

  • ACE inhibitors, exemplified by captopril, induce apoptosis in vascular myocytes.
  • Apoptosis induction is a potential mechanism for ACE inhibitors' favorable effects on cardiovascular remodeling.
  • This mechanism may also contribute to the therapeutic benefits in IgA nephropathy and diabetic nephropathy.