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Related Experiment Videos

Decrease of pigment epithelium-derived factor in aqueous humor with increasing age.

Nahoko Ogata1, Masato Matsuoka, Masahito Imaizumi

  • 1Department of Ophthalmology, Kansai Medical University, Fumizono-cho 10-15, Moriguchi, Osaka 570-8507, Japan. ogata@takii.kmu.ac.jp

American Journal of Ophthalmology
|May 6, 2004
PubMed
Summary

Pigment epithelium-derived factor (PEDF) levels in aqueous humor decrease with age. This age-related decline in PEDF is more pronounced in men and may impact age-related eye diseases.

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Area of Science:

  • Ophthalmology
  • Molecular Biology
  • Gerontology

Background:

  • Pigment epithelium-derived factor (PEDF) is a crucial protein with neurotrophic and anti-angiogenic properties.
  • Understanding age-related changes in ocular biomarkers is vital for managing eye diseases.

Purpose of the Study:

  • To investigate the relationship between age and pigment epithelium-derived factor (PEDF) levels in human aqueous humor.
  • To determine if gender influences PEDF concentration in the aqueous humor.

Main Methods:

  • An observational case series design was employed.
  • Aqueous humor samples were collected from 121 patients undergoing cataract surgery (152 eyes).
  • Pigment epithelium-derived factor (PEDF) concentrations were quantified using enzyme-linked immunosorbent assay (ELISA).

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Main Results:

  • A significant negative correlation was observed between aqueous PEDF levels and patient age (r = -0.22, P =.006).
  • Mean PEDF levels were lower in men (0.76 microg/ml) compared to women (0.91 microg/ml) (P =.03).
  • The average age of participants was 70.7 years.

Conclusions:

  • Age-related decline in aqueous humor PEDF levels is significant.
  • The observed lower PEDF levels in men warrant further investigation.
  • These findings should be considered in the context of age-related eye diseases, particularly those involving angiogenesis.