Effect of isolation method on human corneal stromal cell behaviour.

Area of Science:

• Ophthalmology and regenerative medicine
• Cell biology and tissue engineering

Background:

• Primary corneal stromal cells are vital for in vivo research, typically sourced from donor limbal tissue.
• Central corneal tissue is less utilized in research due to its transplantation priority.
• Whole donor corneas offer research opportunities, including central tissue, but may have longer storage times.

Purpose of the Study:

• To compare central and limbal corneal stromal cells cultured in vitro.
• To investigate the impact of different extraction methods (enzyme digestion vs. explant migration) on stromal cells.
• To understand how extraction method and tissue origin affect cell characteristics.

Main Methods:

• Stromal cells were extracted from both limbal and central regions of healthy donor corneas.
• Two primary extraction methods were employed: enzyme digestion and explant migration.
• Cell adherence, survival, and gene expression were analyzed post-extraction and in culture.

Main Results:

• Extraction method and tissue origin significantly influenced cell adherence, survival, and gene expression.
• Enzyme-digested limbal and central cells exhibited distinct pre-culture gene expression profiles.
• The ALDH3A1 gene was notably more expressed in limbal cells post-enzyme digestion.
• Enzyme digestion of the limbal ring produced the most robust stromal cell populations.

Conclusions:

• Enzyme digestion of limbal corneal tissue yields the hardiest primary stromal cells for research.
• The choice of extraction method and tissue source impacts cultured corneal stromal cell behavior and characteristics.
• Understanding these factors is crucial for consistent and representative in vitro studies.