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Related Experiment Videos

Age-related changes in neutrophil structure and function.

M H Perskin1, B N Cronstein

  • 1Department of Medicine, New York University Medical Center, NY 10016.

Mechanisms of Ageing and Development
|July 15, 1992
PubMed
Summary
This summary is machine-generated.

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Elderly individuals exhibit decreased neutrophil plasma membrane viscosity, leading to reduced oxygen production and impaired adherence to extracellular matrix components. This age-related change in neutrophils may increase susceptibility to bacterial infections.

Area of Science:

  • Immunology
  • Gerontology
  • Cell Biology

Background:

  • Elderly individuals have higher infection rates due to potential age-related changes in neutrophils (PMNs).
  • Previous research indicated increased plasma membrane viscosity in lymphocytes and neurons of the elderly.

Purpose of the Study:

  • To investigate age-related changes in neutrophil plasma membrane viscosity.
  • To determine if altered neutrophil membrane viscosity affects neutrophil function and susceptibility to infection.

Main Methods:

  • Neutrophil plasma membrane viscosity was measured using fluorescence anisotropy of labeled cells.
  • Neutrophil function was assessed by measuring oxygen (O2-) generation, adherence to gelatin and fibrinogen, and chemotaxis.

Main Results:

Related Experiment Videos

  • Neutrophils from elderly individuals showed decreased plasma membrane viscosity compared to young controls.
  • Stimulated O2- generation and adherence to denatured collagen (gelatin) were significantly reduced in elderly neutrophils.
  • Neutrophil adherence to fibrinogen and chemotaxis remained unchanged with age.

Conclusions:

  • Age-related decrease in neutrophil plasma membrane viscosity is linked to diminished O2- production and impaired adherence to the extracellular matrix.
  • These structural and functional alterations in neutrophils may contribute to increased infection risk in the elderly.