| First Author | Maruyama K | Year | 2012 |
| Journal | Invest Ophthalmol Vis Sci | Volume | 53 |
| Issue | 6 | Pages | 3145-53 |
| PubMed ID | 22511631 | Mgi Jnum | J:196828 |
| Mgi Id | MGI:5489989 | Doi | 10.1167/iovs.11-8010 |
| Citation | Maruyama K, et al. (2012) The maintenance of lymphatic vessels in the cornea is dependent on the presence of macrophages. Invest Ophthalmol Vis Sci 53(6):3145-53 |
| abstractText | PURPOSE: It has been shown previously that the presence in the cornea of antigen-presenting cells (APC), such as macrophages (MPS) and lymphangiogenesis, is a risk for corneal transplantation. We sought to determine whether the existence of lymphatic vessels in the non-inflamed cornea is associated with the presence of MPS. METHODS: Flat mounts were prepared from corneas of untreated C57BL/6, CD11b(-/-), F4/80(-/-), and BALB/c mice, and after suture placement or corneal transplantation, observed by immunofluorescence for the presence of lymphatic vessels using LYVE-1 as a marker of lymphatic endothelium. Innate immune cells were detected in normal mouse corneas using CD11b, F4/80, CD40, as well as MHC-class II. Digital images of the flat mounts were taken using a spot image analysis system, and the area covered by lymphatic vessels was measured using NIH Image software. RESULTS: The number of spontaneous lymphatic vessels in C57BL/6 corneas was significantly greater than in BALB/c corneas (P = 0.03). There were more CD11b(+) (P < 0.01) and CD40(+), MHC-class II (+) cells in the C57BL/6 corneas than in BALB/c mouse corneas. MPS depletion via clodronate liposome in C57BL/6 mice led to fewer spontaneous lymphatic vessels and reduced inflammation-induced lymphangiogenesis relative to control mice. Mice deficient in CD11b or F4/80 had fewer spontaneous lymphatic vessels and less lymphangiogenesis than control C57BL/6 mice. CONCLUSIONS: C57BL/6 mouse corneas have more endogenous CD11b(+) cells and lymphatic vessels. The endogenous lymphatic vessels, along with pro-inflammatory MPS, account for the high risk of corneal graft rejection in C57BL/6 mice. CD11b(+) and F4/80(+) MPS appear to have an important role in of the formation of new lymphatic vessels. |
