Progress of stem/progenitor cell-based therapy for retinal degeneration.

Area of Science:

• Ophthalmology
• Regenerative Medicine
• Cell Biology

Background:

• Retinal degeneration (RD) causes blindness, with limited treatment options due to the retina's poor regenerative capacity.
• Current therapies for wet age-related macular degeneration (AMD) only slow progression, not restore vision.

Purpose of the Study:

• To review stem/progenitor cell strategies for treating retinal degeneration.
• To discuss ocular and non-ocular stem cell sources and their application in RD models.

Main Methods:

• Review of studies on four predominant stem/progenitor cell types in animal models of RD.
• Overview of clinical trials involving stem/progenitor cell therapies for RD.

Main Results:

• Stem/progenitor cells show potential for rescuing and replacing photoreceptors and retinal pigmented epithelium (RPE).
• Four main cell types (retinal progenitors, embryonic stem cells, induced pluripotent stem cells, mesenchymal stromal cells) are discussed.
• Clinical trials are underway, but challenges like in vitro proliferation/differentiation and in vivo graft survival persist.

Conclusions:

• Stem/progenitor cell therapy is the most promising future strategy for retinal degeneration treatment.
• Overcoming current limitations in cell proliferation, differentiation, and graft integration is crucial for therapeutic success.