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Related Experiment Videos

Age-dependent changes in monkey lenticular gangliosides.

M Ogiso1, N Saito, K Sudo

  • 1Department of Physiology, Toho University School of Medicine, Tokyo, Japan.

Experimental Eye Research
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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Ganglioside content and complexity increase in rhesus monkey lenses with age. This study identifies specific gangliosides (GM3, GM1, GD1a) and their distribution changes over time.

Area of Science:

  • Biochemistry
  • Ophthalmology
  • Neuroscience

Background:

  • Gangliosides are crucial glycosphingolipids involved in cell recognition and signaling.
  • Changes in lens composition can impact visual function and contribute to aging-related eye conditions.
  • Understanding lenticular ganglioside profiles is essential for comprehending age-related ocular changes.

Purpose of the Study:

  • To investigate the content, composition, and distribution of gangliosides in rhesus monkey lenses.
  • To determine how these ganglioside profiles change with aging in the primate lens.
  • To identify specific ganglioside species present and their variations.

Main Methods:

  • Gangliosides were extracted from rhesus monkey lenses (aged 6-16 years) using organic solvents.

Related Experiment Videos

  • Isolation and purification were performed using DEAE-Sephadex ion-exchange column chromatography.
  • Analysis included thin-layer chromatography (TLC) for compositional analysis and TLC-immunostaining for identification.

    • Main Results:

    • Ganglioside content in the lens significantly increased with age, as quantified by the thiobarbituric acid method.
    • TLC analysis revealed a more complex ganglioside pattern in older lenses compared to younger ones.
    • Predominant gangliosides identified were GM3, GM1, and GD1a, with their presence and distribution varying with age.

    Conclusions:

    • Aging is associated with increased ganglioside content and altered composition within the primate lens.
    • Specific gangliosides like GM3, GM1, and GD1a are key components of the lens, with age-dependent modifications.
    • These findings contribute to understanding the biochemical changes in the aging lens and their potential functional implications.