Secretory leukocyte protease inhibitor is an inducible antimicrobial peptide expressed in Staphylococcus aureus endophthalmitis.

REVIGLIO V; SAMBUELLI R; OLMEDO A; FALCO M; ECHENIQUE J; O'BRIEN T; KUO I

Hindawi Pub. Corp.

Lugar: New York; Año: 2007 vol. 2007 p. 938 - 938

URPOSE: To describe the presence of secretory leukocyte protease inhibitor (SLPI), a cationic peptide with antimicrobial and antiprotease activity, in the innate ocular immune reaction in a rat model of Staphylococcus aureus endophthalmitis. METHODS: Seventy-five female Lewis rats were divided into three groups: the endophthalmitis group received an intravitreal injection of 65 colony-forming units of viable S. aureus, the vehicle-injected group received balanced sterile saline solution (BSS), and the control group was not injected. Eyes were enucleated at 24 and 48 hours and processed for immunohistochemical staining and Western blot studies for SLPI. RESULTS: In S. aureus endophthalmitis eyes, there was strong immunostaining for SLPI in the retina and vitreous with associated neutrophilic infiltrates. At 48 hours, corneas also stained for SLPI. Western blots confirmed increased SLPI expression in all infected eyes. By immunohistochemical assays, SLPI was absent in the BSS and contro