Human Pluripotent Stem Cells Derived Endothelial Cells Repair Choroidal Ischemia

Area of Science:

• Ophthalmology
• Regenerative Medicine
• Vascular Biology

Background:

• Choroidal atrophy is a key factor in age-related macular degeneration (AMD) and pathological myopia.
• Choroidal endothelial cells (CECs) are the primary cells lost during choroidal atrophy.
• Human pluripotent stem cell-derived endothelial cells (hPSC-ECs) show promise for replacing lost CECs.

Purpose of the Study:

• To investigate the therapeutic potential of hPSC-ECs in repairing choroidal ischemia.
• To evaluate the integration and survival of transplanted hPSC-ECs in a rodent model.
• To assess the impact of hPSC-EC transplantation on visual function and choroidal structure.

Main Methods:

• Generation of hPSC-ECs from human pluripotent stem cells via MESP1+ mesodermal progenitors.
• Single-cell RNA sequencing to analyze gene expression in hPSC-ECs.
• Transplantation of hPSC-ECs into the suprachoroidal space of rats with induced choroidal ischemia (CI).
• Histological and functional assessments of the choroid and visual function post-transplantation.

Main Results:

• Transplanted hPSC-ECs expressed CECs-specific markers and integrated into the rat choroidal vasculature.
• hPSC-ECs survived for at least 90 days in the host tissue.
• Transplantation led to increased choroid thickness and vasculature density.
• EC transplantation significantly improved visual function in CI rats.

Conclusions:

• hPSC-ECs can effectively repair choroidal ischemia in an animal model.
• This study demonstrates the potential of hPSC-ECs as a cell-based therapy for choroidal atrophy.
• The findings may pave the way for new treatments for AMD, pathological myopia, and related ocular conditions.