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In vitro study on corneal permeability to bunazosin
Journal of Pharmacobio-Dynamics
|February 1, 1988
Summary
Bunazosin corneal permeability was enhanced by caprylic and capric acids, likely through ion-pair formation. This study found no corneal swelling, suggesting a potential method for improving drug delivery.
Area of Science:
- Ophthalmology
- Pharmacology
- Drug Delivery
Background:
- Bunazosin is an alpha-adrenergic receptor antagonist.
- Understanding corneal permeability is crucial for ophthalmic drug development.
- Corneal drug delivery can be limited by low permeability.
Purpose of the Study:
- To investigate the in vitro corneal permeability of bunazosin.
- To evaluate the effect of various acids on bunazosin corneal permeability.
- To explore the mechanism of permeability enhancement.
Main Methods:
- Utilized an in vitro excised rabbit cornea model.
- Employed a corneal permeability apparatus.
- Assessed octanol/water partition coefficients and corneal permeability.
Main Results:
- Caprylic and capric acids increased bunazosin's octanol/water partition coefficient.
- Corneal permeability of bunazosin was enhanced by these acids.
- Ion-pair formation is suggested as the mechanism for enhancement.
- No corneal swelling was observed with bunazosin, acids, or ion-pairs.
- Pilocarpine partition and permeability were minimally affected.
Conclusions:
- Caprylic and capric acids can enhance bunazosin corneal permeability.
- Ion-pair formation is a likely mechanism for this enhancement.
- This method shows potential for improving ophthalmic drug delivery without causing corneal toxicity.