Establishment and characterization of proliferating primary cultures of equine epidermal keratinocytes.

The research article discusses the development and characterization of primary cultures of epidermal keratinocytes (skin cells) obtained from horses. This study aims to explore molecular processes linked to skin renewal and the pathogenesis of skin diseases by using these cultures.

Establishment of Equine Skin-Derived Primary Cell Cultures

• The research aimed to establish cell cultures of primary equine keratinocytes (peK), which are skin cells from horses. These types of cultures can help researchers study skin diseases, improve wound healing processes, and potentially influence the production of keratinocyte grafts.
• The cell lines were established using both enzymatic and explant methods. The enzymatic method involves breaking down the tissues using enzymes, while the explant method allowed cells to naturally migrate out from tissue pieces placed in the culture dish.
• It was done with the intent to maintain a high proliferative capacity, meaning the cells should be able to multiply successfully for at least five passages (transfers) to ensure the longevity of the culture.

Characterization of Primary Equine Keratinocytes

• After developing the cell lines, they were then characterized using various commercially available antibodies for different epithelial/keratinocyte markers. This aimed to understand the cell type and its specific features better.
• The characterization was also done alongside localization studies of these markers in skin histological sections to provide a comparative analysis.
• Relative expressions of typical markers, which indicate the differentiation stage of the cells, were determined by using a technique called RT-qPCR. This technique helps in understanding how actively certain genes are being transcribed in a cell.

Observations and Findings

• The findings reveal that the primary cell type in these cell lines was basal (proliferating) keratinocytes. However, low expressions of post-mitotic keratinocyte markers were also recorded, hinting these cultures also housed mature keratinocytes that had stopped dividing.
• No differences in marker expression were detected between peK obtained from different animals or established through various methods (enzymatic or explant). This consistency indicates that the methods are reliable for future research.

Conclusion

• The study concludes that the demonstrated methods and suggested characterization and differentiation markers could be effectively used for setting up proliferating peK and evaluating their differentiation status. Such methodologies are crucial for future research on skin diseases and wound healing in horses.