| First Author | Bhatti F | Year | 2014 |
| Journal | Invest Ophthalmol Vis Sci | Volume | 56 |
| Issue | 1 | Pages | 232-42 |
| PubMed ID | 25406276 | Mgi Jnum | J:230990 |
| Mgi Id | MGI:5766621 | Doi | 10.1167/iovs.13-13652 |
| Citation | Bhatti F, et al. (2015) Pulmonary surfactant protein a is expressed in mouse retina by Muller cells and impacts neovascularization in oxygen-induced retinopathy. Invest Ophthalmol Vis Sci 56(1):232-42 |
| abstractText | PURPOSE: Surfactant protein A (SP-A) up-regulates cytokine expression in lung disease of prematurity. Here we present data that for the first time characterizes SP-A expression and localization in the mouse retina and its impact on neovascularization (NV) in the mouse. METHODS: Retinal SP-A was localized in wild-type (WT) mice with the cell markers glutamine synthetase (Muller cells), neurofilament-M (ganglion cells), glial acid fibrillary acid protein (astrocytes), and cluster of differentiation 31 (endothelial cells). Toll-like receptor 2 and 4 (TLR-2 and TLR-4) ligands were used to up-regulate SP-A expression in WT and myeloid differentiation primary response 88 (MyD88) protein (necessary for NFkappaB signaling) null mouse retinas and Muller cells, which were quantified using ELISA. Retinal SP-A was then measured in the oxygen-induced retinopathy (OIR) mouse model. The effect of SP-A on retinal NV was then studied in SP-A null (SP-A(-/-)) mice. RESULTS: SP-A is present at birth in the WT mouse retina and colocalizes with glutamine synthetase. TLR-2 and TLR-4 ligands increase SP-A both in the retina and in Muller cells. SP-A is increased at postnatal day 17 (P17) in WT mouse pups with OIR compared to that in controls (P = 0.02), and SP-A(-/-) mice have reduced NV compared to WT mice (P = 0.001) in the OIR model. CONCLUSIONS: Retinal and Muller cell SP-A is up-regulated via the NFkappaB pathway and up-regulated during the hypoxia phase of OIR. Absence of SP-A attenuates NV in the OIR model. Thus SP-A may be a marker of retinal inflammation during NV. |
