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Related Experiment Videos

Pharmacological testing in the laser-induced monkey glaucoma model.

P Y Lee, S M Podos, J R Howard-Williams

    Current Eye Research
    |July 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

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    This study developed a primate glaucoma model to test intraocular pressure-lowering drugs. Several medications, including timolol and prostaglandin F2 alpha, effectively reduced eye pressure.

    Area of Science:

    • Ophthalmology
    • Pharmacology
    • Veterinary Medicine

    Background:

    • Glaucoma is a leading cause of irreversible blindness.
    • Accurate animal models are crucial for developing effective glaucoma treatments.
    • Trabecular meshwork photocoagulation in primates offers a robust model for studying intraocular pressure regulation.

    Purpose of the Study:

    • To establish and validate a cynomolgus monkey model of induced glaucoma.
    • To evaluate the efficacy of various pharmacological agents in lowering intraocular pressure (IOP) within this model.
    • To assess the impact of these agents on aqueous humor outflow facility.

    Main Methods:

    • Glaucoma was induced in cynomolgus monkeys using argon laser photocoagulation of the trabecular meshwork.

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  • Intraocular pressure was measured hourly using a pneumatonometer before and after drug administration.
  • The effects of timolol, epinephrine, pilocarpine, vanadate, prostaglandin F2 alpha (PGF2 alpha), forskolin, and corynanthine were tested.

    • Main Results:

    • Significant IOP reductions (p < 0.05) were observed with timolol, epinephrine, pilocarpine, vanadate, PGF2 alpha, and forskolin.
    • Corynanthine did not produce a significant IOP-lowering effect.
    • Pilocarpine administration increased outflow facility, indicating a mechanism of action.

    Conclusions:

    • The induced primate glaucoma model demonstrates characteristic IOP fluctuations and is responsive to various IOP-lowering drugs.
    • This model is suitable for investigating novel therapeutic agents targeting different mechanisms of IOP reduction.
    • Pharmacological agents like timolol, epinephrine, and prostaglandin F2 alpha show promise for glaucoma management.