Abstract
Medicine
* These authors contributed equally
ERRATUM NOTICE
Important: There has been an erratum issued for this article. Read more …Retinal pigment epithelial (RPE) transplantation holds great promise for the treatment of inherited and acquired retinal degenerative diseases. These conditions include retinitis pigmentosa (RP) and advanced forms of age-related macular degeneration (AMD), such as geographic atrophy (GA). Together, these disorders represent a significant proportion of currently untreatable blindness globally. These unmet medical needs have generated heightened academic interest in developing methods of RPE replacement. Among the animal models commonly utilized for preclinical testing of therapeutics, the non-human primate (NHP) is the only animal model that has a macula. As it shares this anatomical similarity with the human eye, the NHP eye is an important and appropriate preclinical animal model for the development of advanced therapy medicinal products (ATMPs) such as RPE cell therapy.
This manuscript describes a method for the submacular transplantation of an RPE monolayer, cultured on a polyethylene terephthalate (PET) cell carrier, underneath the macula onto a surgically created RPE wound in immunosuppressed NHPs. The fovea-the central avascular portion of the macula-is the site of the greatest mechanical weakness during the transplantation. Foveal trauma will occur if the initial subretinal fluid injection generates an excessive force on the retina. Hence, slow injection under perfluorocarbon liquid (PFCL) vitreous tamponade is recommended with a dual-bore subretinal injection cannula at low intraocular pressure (IOP) settings to create a retinal bleb.
Pretreatment with an intravitreal plasminogen injection to release parafoveal RPE-photoreceptor adhesions is also advised. These combined strategies can reduce the likelihood of foveal tears when compared to conventional techniques. The NHP is a key animal model in the preclinical phase of RPE cell therapy development. This protocol addresses the technical challenges associated with the delivery of RPE cellular therapy in the NHP eye.
Erratum
Erratum: Retinal Pigment Epithelium Transplantation in a Non-human Primate Model for Degenerative Retinal DiseasesAn erratum was issued for:Â Retinal Pigment Epithelium Transplantation in a Non-human Primate Model for Degenerative Retinal Diseases. The Authors section was updated.
The Authors section was updated from:
Ivan Seah*1, Zengping Liu*2,3,4, Daniel Soo Lin Wong3, Wendy Wong1, Graham E. Holder1,3,5, Veluchamy Amutha Barathi3,4,6, Gopal Lingam1,3,4, Xinyi Su1,2,3,4, Boris V. Stanzel1,7,8
1Department of Ophthalmology, National University Hospital, Singapore,
2Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR),
3Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore,
4Singapore Eye Research Institute (SERI),
5UCL Institute of Ophthalmology,
6Academic Clinical Program in Ophthalmology, Duke-NUS Medical School,
7Macula Center Saar, Eye Clinic Sulzbach, Knappschaft Hospital Saar,
8Department of Ophthalmology, University of Bonn
* These authors contributed equally
to:
Ivan Seah*1,2, Zengping Liu*1,3,4, Daniel Soo Lin Wong1, Wendy Wong2, Graham E. Holder1,2,5, Veluchamy Amutha Barathi1,4,6, Gopal Lingam1,2,4, Xinyi Su1,2,3,4, Boris V. Stanzel1,7,8
1Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore
2Department of Ophthalmology, National University Hospital, Singapore,
3Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR)
4Singapore Eye Research Institute (SERI),
5UCL Institute of Ophthalmology,
6Academic Clinical Program in Ophthalmology, Duke-NUS Medical School,
7Macula Center Saar, Eye Clinic Sulzbach, Knappschaft Hospital Saar,
8Department of Ophthalmology, University of Bonn
* These authors contributed equally
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