Abstract:
PURPOSE:The normal cornea is devoid of blood and lymphatic vessels but can become vascularized secondary to a variety of corneal diseases and surgical manipulations. Whereas corneal (hem)angiogenesis, i.e., the outgrowth of new blood vessels from preexisting limbal vessels, is obvious both clinically and histologically, proof of associated corneal lymphangiogenesis has long been hampered by invisibility and lack of specific markers. This has changed with the recent discovery of the lymphatic endothelial markers vascular endothelial growth factor receptor 3, LYVE-1 (a lymphatic endothelium-specific hyaluronan receptor), Prox 1, and Podoplanin. METHODS:We herein summarize the current evidence for lymphangiogenesis in the cornea and describe its molecular markers and mediators. Furthermore, the pathophysiologic implications of corneal lymphangiogenesis for corneal transplant immunology are discussed. RESULTS:Whereas corneal angiogenesis in vascularized high-risk beds provides a route of entry for immune effector cells to the graft, lymphangiogenesis enables the exit of antigen-presenting cells and antigenic material from the graft to regional lymph nodes, thus inducing alloimmunization and subsequent graft rejection. CONCLUSIONS:Antilymphangiogenic strategies may improve transplant survival both in the high- and low-risk setting of corneal transplantation.
journal_name
Corneajournal_title
Corneaauthors
Cursiefen C,Chen L,Dana MR,Streilein JWdoi
10.1097/00003226-200304000-00021subject
Has Abstractpub_date
2003-04-01 00:00:00pages
273-81issue
3eissn
0277-3740issn
1536-4798journal_volume
22pub_type
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