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[Effect of neonatal retinal pigment cell transplantation on aged retinas]
K Yamaguchi1, K Yamaguchi, V P Gaur
1Department of Ophthalmology, Tohoku University School of Medicine, Sendai, Japan.
Insights
Neonatal retinal pigment epithelium (RPE) transplantation into aged rat eyes successfully deterred aging changes. This study demonstrates RPE transplantation
Area of Science:
- Ophthalmology
- Regenerative Medicine
- Aging Research
Context:
- Aging leads to photoreceptor cell death and retinal degeneration.
- Fischer-344 rats are a validated model for studying age-related vision loss.
- Retinal pigment epithelium (RPE) dysfunction is implicated in various blinding conditions.
Purpose:
- To investigate the potential of neonatal RPE transplantation to mitigate age-related retinal changes.
- To assess if aging-associated retinal degeneration can be halted or reversed using RPE grafts.
- To evaluate the long-term efficacy of subretinal RPE transplantation in an aged rodent model.
Summary:
- Neonatal RPE cells were transplanted into the subretinal space of 3-month-old Fischer-344 rats.
- Grafted RPE cells significantly preserved retinal layer thickness compared to controls at 3 and 6 months post-transplantation.
- Transplanted RPE cells reduced age-related cell loss in the outer and inner nuclear layers from 40% to 17% and 33% to 8%, respectively.
Impact:
- Neonatal RPE transplantation shows promise for preserving retinal structure and function in aging eyes.
- This study provides a potential therapeutic strategy for age-related retinal diseases.
- Demonstrates the capacity of healthy RPE to counteract age-induced retinal cellular attrition.
Abstract:
The authors performed neonatal healthy retinal pigment epithelium (RPE) transplantation into older eyes to test whether aging changes could be deterred or arrested in an appropriate model. Fischer-344 rats, a model for studying age-related photoreceptor cell death, were used as the recipient and 6- to 8-day-old Long Evans rats were used as the donor of neonatal RPE. Isolated RPE cells were transplanted into the subretinal space in 24, 3-month-old Fischer-344 rats. The presence of healthy neonatal RPE cells significantly maintained the thickness of each layer as compared to the findings in nongrafted and sham operated controls at 3 and 6 months after the transplantation. The transplanted RPE cells saved the reduction of cell population caused by aging from 40% to 17% in the outer nuclear layer and from 33% to 8% in the inner nuclear layer at 6 months after transplantation.