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Related Experiment Videos

Tissue-type plasminogen activator in subretinal fluid.

I Immonen1, R W Stephens, E M Salonen

  • 1Department of Ophthalmology, Helsinki University Hospital, Finland.

Current Eye Research
|March 1, 1989
PubMed
Summary
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The plasmin system, a key part of extracellular proteolysis, is activated in some retinal detachment cases. Tissue-type plasminogen activator is the main driver, potentially increasing pigment epithelial cell dispersion.

Area of Science:

  • Ophthalmology
  • Biochemistry
  • Extracellular Matrix Biology

Background:

  • The plasminogen activation system is a primary pathway for extracellular proteolysis.
  • Understanding its role in ocular conditions like retinal detachment is crucial for therapeutic development.

Purpose of the Study:

  • To investigate the presence and activity of plasmin and plasminogen activators in subretinal fluid (SRF) from patients with retinal detachment.
  • To determine the specific plasminogen activators involved in SRF during retinal detachment.

Main Methods:

  • Measurement of plasmin and plasminogen activators in subretinal fluid samples.
  • Analysis of 12 SRF samples from patients with retinal detachment.

Main Results:

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  • Plasmin was detected in 5 out of 12 SRF samples.
  • Tissue-type plasminogen activator was present in 5 samples, but its activity did not consistently correlate with plasmin levels.
  • Urokinase-type plasminogen activator was not detected in any SRF samples.

Conclusions:

  • The plasmin system is activated in the subretinal fluid of some patients with retinal detachment.
  • Tissue-type plasminogen activator appears to be the predominant activator in these cases.
  • Activated plasmin in SRF may contribute to pigment epithelial cell dispersion, a common feature in retinal detachment.