Abstract:
PURPOSE:Neovascularization of the avascular cornea is a significant problem associated with many corneal diseases. Because Fas ligand (FasL) is highly expressed in the cornea, the role of this molecule in controlling corneal neovascularization was examined in this study. METHODS:C57BL/6(B6), FasL (CD95L)-deficient B6-gld, and Fas (CD95)-deficient B6-lpr mice were subjected to the suture model of neovascularization. Corneas were evaluated for neovascularization and representative samples subjected to immunohistochemical analysis for expression of Fas antigen and CD31 (platelet-endothelial cell adhesion molecule [PECAM-1]) on vessels that were present in the tissue. Corneas were also explanted and placed in collagen gel cultures to test the ability of anti-Fas antibody to prevent vessel extension from explanted corneas. RESULTS:Immunohistochemical data demonstrated that quiescent vessels express CD31 alone, whereas vessels that penetrate the cornea coexpressed both the Fas antigen and CD31. A significant increase was observed in neovascularization in FasL-deficient B6-gld corneas compared with B6 corneas, and new vessel growth in both B6 and B6-gld was inhibited by anti-Fas antibody. Whereas Fas-deficient B6-lpr corneas displayed significantly less neovascularization than normal B6, B6-lpr mice express Fas on growing vessels. In corneal explant cultures, vessel growth from B6 and lpr mice corneas was inhibited by anti-Fas antibody, confirming functional Fas expression in B6-lpr mice. CONCLUSIONS:These data indicate that FasL is an important factor in controlling corneal neovascularization.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Stuart PM,Pan F,Plambeck S,Ferguson TAdoi
10.1167/iovs.02-0299keywords:
subject
Has Abstractpub_date
2003-01-01 00:00:00pages
93-8issue
1eissn
0146-0404issn
1552-5783journal_volume
44pub_type
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