Chemotactic factors can cause polymorphonuclear leukocytes to release the contents of azurophilic granules, including the enzymes β-glucuronidase and myeloperoxidase. In the presence of aqueous humor from the anterior chamber of the rabbit eye, the supernatant from stimulated leukocytes contains β-glucuronidase, but myeloperoxidase is not detectable. Studies with aqueous humor and partially purified human myeloperoxidase suggest that this phenomenon is not due to a failure of enzyme release. The factor responsible for the inability to detect MPO in the assay system is heat-labile, dialyzable, and reversed by ascorbate oxidase. Comparable assay inhibition is produced by ascorbic acid at a concentration present in either human or rabbit aqueous humor. The ability of aqueous humor to protect against myeloperoxidase-induced oxidation may contribute to several diverse phenomena, including the susceptibility of the eye to Candida infection and a prolonged half-life for several inflammatory mediators in the anterior chamber.
|Original language||English (US)|
|Number of pages||4|
|Journal||American Journal of Pathology|
|State||Published - 1985|
ASJC Scopus subject areas
- Pathology and Forensic Medicine