Cell Therapy for Retinal Degenerative Diseases: Progress and Prospects.

Area of Science:

• Ophthalmology
• Regenerative Medicine
• Cell Biology

Background:

• Age-related macular degeneration (AMD) and retinitis pigmentosa (RP) are leading causes of irreversible vision loss.
• Current treatments for advanced AMD and RP are limited, highlighting the need for novel therapeutic strategies.
• Both conditions involve progressive retinal degeneration, impacting millions worldwide.

Purpose of the Study:

• To review retinal anatomy and physiology.
• To elucidate the pathophysiology of AMD and RP.
• To evaluate emerging cell-based therapies for AMD and RP, including their potential and challenges.

Main Methods:

• Comprehensive literature review of preclinical and clinical studies on cell therapies.
• Analysis of stem cell types: embryonic stem cells (ESCs), induced pluripotent stem cells (iPSCs), mesenchymal stem cells (MSCs), and retinal progenitor cells.
• Evaluation of therapeutic mechanisms (cell replacement, neuroprotection, paracrine effects) and clinical translation challenges.

Main Results:

• Cell-based therapies offer potential for retinal function restoration and disease progression slowing via neuroprotection and cell replacement.
• Preclinical trials yield promising results, but clinical studies face hurdles in cell delivery, integration, and long-term efficacy.
• Emerging combination therapies involving gene editing and biomaterials present future avenues.

Conclusions:

• Cell therapies for AMD and RP have advanced significantly but face substantial barriers to widespread clinical application.
• Further research is crucial to address challenges in cell delivery, efficacy, and safety.
• Successful translation requires overcoming obstacles to ensure effective clinical practice for these blinding conditions.