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Related Experiment Videos

Age and membrane fluidity.

R Wahnon1, S Mokady, U Cogan

  • 1Department of Food Engineering and Biotechnology, Technion-Israel Institute of Technology, Haifa.

Mechanisms of Ageing and Development
|December 1, 1989
PubMed
Summary
This summary is machine-generated.

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Aging decreases intestinal membrane fluidity in male rats, affecting transition temperatures. Red blood cell membrane fluidity showed minimal age-related changes.

Area of Science:

  • Biogerontology
  • Membrane Biophysics
  • Cellular Aging

Background:

  • Cell membrane fluidity is crucial for cellular function.
  • Aging is associated with alterations in cellular structures and functions.
  • Understanding age-related changes in membrane properties is vital for gerontological research.

Purpose of the Study:

  • To investigate the impact of aging on membrane fluidity in different rat tissues.
  • To determine age-associated changes in the intestinal microvillus and red blood cell membranes.
  • To correlate changes in membrane fluidity with alterations in transition temperatures.

Main Methods:

  • Utilized male rats of three age groups: 1, 9, and 19 months.
  • Employed fluorescence polarization technique with 1,6-diphenyl-1,3,5-hexatriene (DPH) as a fluorescent probe.

Related Experiment Videos

  • Analyzed membrane fluidity and gel-to-liquid crystalline transition temperature in isolated intestinal microvillus and red blood cell membranes.

    • Main Results:

    • Intestinal microvillus membranes from 19-month-old rats exhibited significantly lower fluidity compared to younger rats.
    • A corresponding increase in the gel-to-liquid crystalline transition temperature was observed with aging in intestinal membranes.
    • Red blood cell membranes showed only minor, statistically insignificant changes in fluidity across the studied age groups.

    Conclusions:

    • Aging leads to a decrease in intestinal microvillus membrane fluidity, impacting its physical properties.
    • The observed changes in intestinal membrane fluidity with age suggest potential functional consequences.
    • Red blood cell membranes appear to be more resistant to age-related alterations in fluidity.