Related Experiment Videos
Microfibrillar protein and phospholipid in granular corneal dystrophy
Archives of Ophthalmology (Chicago, Ill. : 1960)
|May 1, 1983
Summary
Granular corneal dystrophy (GCD) involves abnormal microfibrillar protein deposits in the cornea. These deposits contain specific peptides and altered lipids, impacting corneal structure.
Area of Science:
- Ophthalmology
- Biochemistry
- Histology
Background:
- Granular corneal dystrophy (GCD) is a hereditary eye disease.
- The precise composition of the characteristic corneal deposits in GCD remains incompletely understood.
Purpose of the Study:
- To characterize the molecular and ultrastructural composition of granular deposits in GCD.
- To investigate the protein and lipid components within these corneal opacities.
Main Methods:
- Immunohistological staining with various antibodies.
- Transmission electron microscopy (TEM) for ultrastructural analysis.
- Sodium dodecyl sulfate gel electrophoresis (SDS-PAGE) for peptide analysis.
Main Results:
- GCD deposits stained positively for microfibrillar protein and showed tubular microfibrils on TEM.
- SDS-PAGE revealed denser peptide bands at 65 and 110 kDa in GCD corneas.
- Luxol fast blue MBSN stain was positive; stains for elastin, amyloid, and glycosaminoglycans were negative.
- Increased lipid content in phospholipid classes and altered fatty acid profiles were observed in some GCD corneas.
Conclusions:
- Corneal granules in GCD are primarily composed of microfibrillar proteins and associated lipids.
- The findings differentiate GCD from other corneal dystrophies and suggest specific molecular pathways involved.