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[Keratocyte apoptosis in keratoconus]
Vestnik Oftalmologii
|October 10, 2002
Summary
Keratoconus corneas show significantly higher CD95 receptor expression and keratocyte apoptosis, indicating a Fas-mediated mechanism is dominant in this condition.
Area of Science:
- Ophthalmology
- Cell Biology
- Immunology
Background:
- Keratoconus is a progressive thinning of the cornea.
- Keratocyte apoptosis, or programmed cell death, is implicated in corneal diseases.
- The role of CD95 receptor (Fas) in keratocyte apoptosis in keratoconus is not fully understood.
Purpose of the Study:
- To investigate the expression of CD95 receptors on keratocytes.
- To evaluate the rate of keratocyte apoptosis in keratoconus.
- To determine if Fas-mediated apoptosis plays a significant role in keratoconus.
Main Methods:
- Analysis of corneal disks from keratoconus patients (n=37) and controls (n=15).
- Indirect immunofluorescence was used to detect CD95 receptor expression on keratocyte membranes.
- Indirect immunofluorescence labeling of nuclear DNA nucleotides was employed to assess keratocyte apoptosis.
Main Results:
- Corneal disks from keratoconus patients exhibited an approximately 8-fold higher proportion of keratocytes expressing CD95 receptors compared to controls.
- The apoptosis index of keratocytes was approximately 5-fold higher in keratoconus corneas than in control corneas.
- A significant increase in both CD95 expression and apoptosis was observed in keratoconus.
Conclusions:
- The findings suggest a Fas-mediated mechanism drives keratocyte apoptosis in keratoconus.
- This Fas-mediated apoptosis is significantly more prevalent in keratoconus corneas.
- These results have clinical implications for developing targeted therapies for keratoconus.
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