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Related Experiment Videos

[Cell-to-cell interactions between iris and trabecular meshwork in primary open-angle glaucoma].

M M Krasnov, G G Ziangirova, O V Antonova

    Vestnik Oftalmologii
    |March 31, 2000
    PubMed
    Summary

    Primary open-angle glaucoma (POAG) involves iris microcirculation damage, affecting the trabecular system. Therapeutic strategies should target improving ocular blood flow and providing antioxidant support.

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    Area of Science:

    • Ophthalmology
    • Pathology
    • Microcirculation

    Background:

    • Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness.
    • The role of iris ischemia in POAG pathogenesis remains incompletely understood.
    • Ocular draining system integrity is crucial for maintaining intraocular pressure.

    Purpose of the Study:

    • To investigate the pathomorphological changes in the ocular draining system associated with iris ischemia in POAG patients.
    • To elucidate the relationship between iridal microcirculatory abnormalities and trabecular system pathology.
    • To identify potential therapeutic targets for managing POAG.

    Main Methods:

    • Histochemical staining (Congo red, thioflavin, toluidine blue) of scleral and iridal biopsy specimens.

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  • Electron microscopy examination of ocular tissues.
  • Analysis of 173 biopsy specimens from 115 POAG patients aged 32-90 years.

    • Main Results:

    • Morphological alterations in the trabecular system are linked to abnormalities in the iridal microcirculatory bed.
    • Trabecular system status correlates with the severity of involvement of iridal arterioles, capillaries, and venules.
    • Pathology of endotheliocytes and collagen matrix in the trabecular system is associated with iris dystrophy and anterior segment biochemical changes.

    Conclusions:

    • Iris microcirculatory dysfunction significantly impacts the trabecular system in POAG.
    • Therapeutic approaches for POAG should consider agents that enhance ocular microcirculation.
    • Antihypoxant and antioxidant therapies may be beneficial in managing POAG by addressing ischemic and dystrophic processes.