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Related Experiment Videos

CD44H localization in primary open-angle glaucoma

P A Knepper1, W Goossens, C S Mayanil

  • 1Laboratory for Oculo-Cerebrospinal Investigation, Children's Memorial Medical Center, Northwestern University Medical School, Chicago, IL 60614, USA.

Investigative Ophthalmology & Visual Science
|April 16, 1998
PubMed
Summary
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Reduced CD44H, a hyaluronan receptor, was found in key eye tissues of primary open-angle glaucoma (POAG) patients. This suggests CD44H may be a POAG marker and contribute to the disease process.

Area of Science:

  • Ophthalmology
  • Cell Biology
  • Glaucoma Research

Background:

  • Primary open-angle glaucoma (POAG) is linked to reduced hyaluronan in the trabecular meshwork and juxtacanalicular tissue.
  • CD44H is a key transmembrane glycoprotein and the primary receptor for hyaluronan.

Purpose of the Study:

  • To investigate the localization and content of CD44H in specific anterior segment regions of POAG eyes.
  • To determine if CD44H levels differ between POAG and normal eyes.

Main Methods:

  • Immunostaining of anterior eye segment sections from POAG and normal eyes using a CD44H antibody.
  • Analysis with and without Triton X-100 to assess CD44H expression.
  • Quantification using computer-aided color image analysis.

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Main Results:

  • CD44H expression was detected in all analyzed regions.
  • Significantly lower CD44H content was observed in POAG eyes compared to normal eyes in regions including ciliary muscle, ciliary stroma, iris, and trabecular meshwork.
  • Triton X-100 treatment enhanced immunostaining in normal eyes, and distinct CD44H expression patterns helped differentiate POAG from normal cases.

Conclusions:

  • CD44H may serve as a diagnostic marker for POAG.
  • The altered CD44H content suggests it could be an etiological factor in the development of POAG.