PMID- 10328976 OWN - NLM STAT- MEDLINE DCOM- 19990616 LR - 20151119 IS - 0014-4835 (Print) IS - 0014-4835 (Linking) VI - 68 IP - 5 DP - 1999 May TI - Rabbit retinal Muller cells undergo antigenic changes in response to experimentally induced proliferative vitreoretinopathy. PG - 617-27 AB - Experimental proliferative vitreoretinopathy (PVR) was induced in the rabbit eye by injecting mitotically active Muller cells into the vitreal chamber. Two weeks after the initiation of PVR, the retina and the epiretinal membrane that formed were examined to ascertain the antigenic expression of Muller cells in the retina and in the epiretinal membrane. Examination of various regions of the retina from the experimental PVR eye demonstrated that vimentin, glial fibrillary acidic protein (GFAP), cellular retinaldehyde binding protein (CRALBP), and beta-amyloid precursor protein (beta-APP), which were present in the Muller cells of the retina from the control eye, increased their expression, while the antigenicity of glutamine synthetase (GS), did not change; these proteins were also present in the cells contained within the experimentally induced epiretinal membrane. Alpha smooth muscle actin (alpha-SMA), a cytoskeletal protein that is associated with migration and tractional forces in many cell types, was not only present in the cells embedded within the epiretinal membrane, but was also present in the Muller cells underlying the epiretinal membrane. However, Muller cells that were in the inferior portion of the retina, where epiretinal membrane pathology was absent, did not express alpha-SMA. Although this protein is not normally found in Muller cells, they do express it de novo when they are maintained in culture. This suggests that a localized mechanism associated with epiretinal membrane formation induces the expression of alpha-SMA in Muller cells while the increased expression of GFAP, beta-APP, vimentin, and CRALBP are probably regulated via a more general mechanism. CI - Copyright 1999 Academic Press. FAU - McGillem, G S AU - McGillem GS AD - Eye Foundation Hospital, Department of Ophthalmology, University of Alabama at Birmingham, Birmingham, AL, 35233, USA. FAU - Dacheux, R F AU - Dacheux RF LA - eng GR - EY-03011/EY/NEI NIH HHS/United States GR - P30EY03039/EY/NEI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Exp Eye Res JT - Experimental eye research JID - 0370707 RN - 0 (11-cis-retinal-binding protein) RN - 0 (Actins) RN - 0 (Amyloid beta-Protein Precursor) RN - 0 (Antigens) RN - 0 (Biomarkers) RN - 0 (Carrier Proteins) RN - 0 (Glial Fibrillary Acidic Protein) RN - 0 (Vimentin) SB - IM MH - Actins/analysis MH - Amyloid beta-Protein Precursor/analysis MH - Animals MH - Antigens/*analysis MH - Biomarkers/analysis MH - Carrier Proteins/analysis MH - Cells, Cultured MH - Glial Fibrillary Acidic Protein/analysis MH - Immunohistochemistry MH - Neuroglia/*metabolism/pathology MH - Rabbits MH - Retina/*metabolism/pathology MH - Vimentin/analysis MH - Vitreoretinopathy, Proliferative/*metabolism/pathology EDAT- 1999/05/18 00:00 MHDA- 1999/05/18 00:01 CRDT- 1999/05/18 00:00 PHST- 1999/05/18 00:00 [pubmed] PHST- 1999/05/18 00:01 [medline] PHST- 1999/05/18 00:00 [entrez] AID - S0014-4835(98)90648-0 [pii] AID - 10.1006/exer.1998.0648 [doi] PST - ppublish SO - Exp Eye Res. 1999 May;68(5):617-27. doi: 10.1006/exer.1998.0648.