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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

A study of PAF-induced ocular inflammation in the rat and its inhibition by the PAF antagonist, L-652,731.

A significant inflammatory reaction in the rat conjunctiva followed the subconjunctival injection of synthetic platelet activating factor (PAF) in doses which ranged from 10 ng to 1 microgram, an inflammatory response being evaluated as the increase in both tissue weight and extravasation of Evans blue dye in the conjunctival tissue. Inflammation was still present 6 h after the injection of 0.1 microgram of PAF. Orally administered indomethacin or BW 755C failed to alter the response to 0.1 microgram of PAF. In contrast, the PAF-induced inflammation was blocked by the oral administration of the PAF receptor antagonist, L-652,731, a dose as low as 5 mg kg-1 eliciting a significant inhibition. The topical administration of L-652,731, (two doses of 100 micrograms as a 1% suspension), elicited a slight, but significant blockade of 23%. Its antagonistic action was more striking when it was co-injected subconjunctivally with 0.1 microgram of PAF, a dose as low as 3 micrograms evoking a significant blockade. The topical administration of 0.1 microgram of PAF did not elicit a significant inflammatory reaction and this contrasts with the results obtained after its subconjunctival injection.[1]

References

  1. A study of PAF-induced ocular inflammation in the rat and its inhibition by the PAF antagonist, L-652,731. Gautheron, P.D., Coulbault, L., Sugrue, M.F. J. Pharm. Pharmacol. (1987) [Pubmed]
 
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