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Transplantation of cultured human retinal pigment epithelium into rabbit subretina

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Abstract

Transplantation of normal retinal pigment epithelium (RPE) into a diseased eye holds promise for treatment of several blinding disorders. Previuos studies have involved immunosuppression and implantation of freshly isolated cells. We report here the successful transplantation of cultured human RPE cells into rabbits that were not immunosuppressed. A modified pars plana transvitreal technique was used for RPE transplantation. The cultured RPE cells, loaded with carbon as a marker, were transplanted into the denuded Bruch's membrane of albino rabbits. The animals were followed for from 1 week to 3 months. On histologic examination at 2 months, no infiltrating lymphocytes were found in the vitreous cavity or choroid, even though Bruch's membrane was damaged. At about 3 months there were some macrophages in the subretina of transplanted eyes, indicating that an immunoreaction does occur eventually. Electron microscopy of the transplanted RPE showed apical-basal polarity and gap junctions. Restored function was attested to by the presence of phagosomes and phagocytosed outer segments in the transplanted cells. Our findings suggest that there is a weak, delayed immunoreaction to human RPE cells transplanted beneath the retina of the rabbit; however, functional recovery of the transplanted cells occurs before this immune response develops.

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Authors and Affiliations

  1. Department of Ophthalmology, University of Southern California, School of Medicine, The Doheny Eye Institute, 1450 San Pablo Street, 90033, Los Angeles, CA, USA

    S. He, H. -M. Wang, T. E. Ogden & S. J. Ryan

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  1. S. He
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  2. H. -M. Wang
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  3. T. E. Ogden
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  4. S. J. Ryan
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Additional information

Supported in part by NIH Grants EY-01545 and EY-03040, the latter a Core Grant for Vision Research

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He, S., Wang, H.M., Ogden, T.E. et al. Transplantation of cultured human retinal pigment epithelium into rabbit subretina. Graefe's Arch Clin Exp Ophthalmol 231, 737–742 (1993). https://doi.org/10.1007/BF00919290

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  • DOI: https://doi.org/10.1007/BF00919290

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