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Investigative Ophthalmology & Visual Science, Vol 27, 1288-1292, Copyright © 1986 by Association for Research in Vision and Ophthalmology

ARTICLES AND REPORTS

Anaphylatoxin levels in human aqueous humor

BJ Mondino and H Sumner

Radioimmunoassay was used to measure levels of C3a, C4a, and C5a in aqueous humor from 13 normal eyes, 8 noninflamed eyes with a history of surgery or inflammation, and 14 eyes with anterior uveitis. The authors were unable to measure levels of C3a, C4a, or C5a in normal aqueous humor. In noninflamed aqueous humor from eyes with a history of surgery or inflammation, the authors were unable to measure levels of C4a or C5a, but were able to measure low levels of C3a in 3/8 patients. In aqueous humor from eyes with anterior uveitis, the authors were able to measure levels of C3a in all 14 patients, C4a in 9/14 patients, and C5a in 5/14 patients. Patients with severe anterior uveitis had higher levels of C3a than those with moderate anterior uveitis. The higher ratios of anaphylatoxin to protein levels in inflamed aqueous humor, when compared to normal plasma or noninflamed aqueous humor, suggested that complement was being activated by either the classical or alternative pathways in inflamed aqueous humor. Measurable levels of C3a without detectable C4a in five patients with anterior uveitis suggested alternative pathway activation of complement.




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Copyright © 1986 by the Association for Research in Vision and Ophthalmology