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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Schorderet, Daniel F. Traboulsi, Elias Marmorstein, Lihua Y. Munier, Francis L. Marmorstein, Alan D. Arsenijevic, Yvan Mclaughlin, Precious J. Chung, Daniel |
| Description | Author Affiliation: Marmorstein LY ( Cole Eye Institute, and Department of Cell Biology, Lerner Research Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA. marmorl@ccf.org); |
| Abstract | Malattia Leventinese (ML), an inherited macular degenerative disease, is closely reminiscent of age-related macular degeneration (AMD), the most common cause of incurable blindness. Both ML and AMD are characterized by extracellular deposits known as drusen between the retinal pigment epithelium (RPE) and Bruch's membrane. The mechanism underlying drusen formation is unknown. An Arg to Trp mutation in a gene of unknown function, EFEMP1, is responsible for ML, indicating EFEMP1 may be important in drusen formation. Here, we show that wild-type EFEMP1 is a secreted protein whereas mutant EFEMP1 is misfolded, secreted inefficiently, and retained within cells. In normal eyes, EFEMP1 is not present at the site of drusen formation. However, in ML eyes, EFEMP1 accumulates within the RPE cells and between the RPE and drusen, but does not appear to be a major component of drusen. Furthermore, in AMD eyes, EFEMP1 is found to accumulate beneath the RPE immediately overlaying drusen, but not in the region where there is no apparent retinal pathology observed. These data present evidence that misfolding and aberrant accumulation of EFEMP1 may cause drusen formation and cellular degeneration and play an important role in the etiology of both ML and AMD. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 20 |
| Volume Number | 99 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2002-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Extracellular Matrix Proteins Genetics Metabolism Macular Degeneration Antibodies Cell Line DNA, Complementary Gene Library Glutathione Transferase Immunoblotting Immunohistochemistry Pathology Mutation Pigment Epithelium Of Eye Precipitin Tests Protein Folding Recombinant Fusion Proteins Retina Retinal Drusen Time Factors Transfection Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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