Optimization of Storage Temperature for Cultured ARPE-19 Cells

Area of Science:

• Ophthalmology
• Cell Biology
• Tissue Engineering

Background:

• Retinal pigment epithelium (RPE) cell replacement therapy holds promise for treating retinal diseases.
• Availability of viable, tissue-engineered RPE cells is crucial for therapeutic success.
• Effective storage methods are needed to maintain RPE cell quality.

Purpose of the Study:

• To investigate the impact of various storage temperatures on cultured RPE cell viability, morphology, and phenotype.
• To determine optimal storage conditions for preserving RPE cell integrity.

Main Methods:

• ARPE-19 cells were cultured and stored for seven days at temperatures ranging from 4°C to 37°C.
• Cell viability and phenotype were assessed using microplate fluorometry and epifluorescence microscopy.
• Cell morphology was analyzed via scanning electron microscopy.

Main Results:

• Storage at 16°C yielded the highest percentage of viable cells (48.7%).
• Optimal ultrastructure preservation was observed at 12°C, 16°C, and 20°C.
• Key protein expression (actin, ZO-1, PCNA, caspase-3, RPE65) was maintained at 16°C.

Conclusions:

• Storage temperatures between 12°C and 20°C are optimal for maintaining RPE cell viability, morphology, and phenotype.
• RPE cell preservation is highly dependent on storage temperature.
• Findings support the development of storage protocols for tissue-engineered RPE.