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Published on: February 12, 2018
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Daylight vision repair by cell transplantation
Tiago Santos-Ferreira1, Kai Postel, Henrike Stutzki
1CRTD/DFG-Center for Regenerative Therapies Dresden, Technische Universität Dresden, Dresden, Germany.
Stem Cells (Dayton, Ohio)
|September 4, 2014
Summary
Researchers developed a new cell therapy for cone photoreceptor degeneration, a leading cause of blindness. This approach successfully restored light-dependent vision in mice, offering hope for treating human daylight vision impairment.
Area of Science:
- Ophthalmology
- Neuroscience
- Regenerative Medicine
Background:
- Human daylight vision relies on cone photoreceptors, and their degeneration causes irreversible blindness.
- Current cell replacement therapies primarily target rod dystrophies, leaving cone degenerations understudied.
- No effective treatments exist for diseases involving cone photoreceptor loss.
Purpose of the Study:
- To establish an abundant and traceable source of donor cone-like photoreceptors for cell replacement therapy.
- To investigate the feasibility of restoring daylight vision through cell transplantation in mouse models of cone degeneration.
Main Methods:
- Generated tg(Nrl(-/-); aGFP) mice by crossing Nrl(-/-) mice with a GFP reporter line to create a source of cone-like photoreceptors.
- Enriched donor cells using CD73-based magnetic activated cell sorting.
- Transplanted cells into the subretinal space of adult wild-type, cone-only (Nrl(-/-)), or Cpfl1 mice.
- Assessed cell integration, morphology, marker expression, survival, and functional recovery using retinal ganglion cell recordings.
Main Results:
- Donor cells integrated into host retinas, exhibited mature photoreceptor morphology, and expressed cone-specific markers.
- Transplanted cells survived for up to 6 months, with enhanced integration in Nrl(-/-) recipients.
- Retinal ganglion cell recordings showed restored photopic responses in transplanted cone degeneration models.
Conclusions:
- Successfully generated and transplanted functional cone-like photoreceptors derived from Nrl(-/-) mice.
- Demonstrated the potential of cell replacement therapy to restore daylight vision in adult mammalian retinas.
- This study provides a crucial preclinical proof-of-concept for treating cone photoreceptor degenerations.
