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Related Experiment Videos

Apoptosis and calcification

K M Kim1

  • 1Department of Pathology, V. A. Medical Center and LSU Medical Center, Shreveport, Louisiana 71101-4295, USA.

Scanning Microscopy
|January 1, 1995
PubMed
Summary
This summary is machine-generated.

Apoptosis, or programmed cell death, is a key driver of calcification. This process involves calcium and phosphate accumulation in cell blebs, forming the basis for both normal and abnormal calcification.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Pathology

Background:

  • Calcification is a known phenomenon in necrotic tissues.
  • The role of cell death, particularly apoptosis, in calcification has been understudied.
  • Understanding calcification mechanisms is crucial for various medical conditions.

Purpose of the Study:

  • To review and update the mechanisms of calcification.
  • To emphasize the role of apoptosis in the calcification process.
  • To compare physiological and pathological calcification.

Main Methods:

  • Review of existing scientific literature on calcification and apoptosis.
  • Discussion of calcium (Ca2+) and phosphate (Pi) homeostasis in cell injury and apoptosis.
  • Comparison of data from physiological calcification and dystrophic calcinoses.

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Main Results:

  • Apoptotic and/or necrotic cells exhibit increased Ca2+ and Pi in blebs and matrix vesicles, initiating calcification.
  • Membranous cellular degradation products (CDP) from cell disintegration act as a nidus for calcification.
  • Apoptosis appears to be the underlying mechanism for both physiological and pathological calcification.

Conclusions:

  • Calcification is an integral function of apoptosis.
  • Cellular degradation products play a significant role in the calcification process.
  • The morphology and mechanisms of calcification by CDP are complex.