Expression of putative markers of pluripotency in equine embryonic and adult tissues.

This study investigates the expression of several markers that potentially indicate pluripotency (the ability of a stem cell to develop into any cell type) in horse tissues including early embryos, induced pluripotent stem cells, testis, adipose- and bone marrow-derived mesenchymal stromal cells, and keratinocytes. The study confirmed that these markers show high expression in embryos and iPSCs and are largely absent in keratinocytes, highlighting hereto underexplored details of cell differentiation in horses.

Study Purpose and Methodology

• The research aimed to identify and evaluate the expression of potential markers of pluripotency (OCT4, SOX2, NANOG, LIN28A, REX1, DNMT3B, and TERT) in various equine tissues. Pluripotency is the capacity of certain stem cells to differentiate into any type of cell in the human body.
• To fulfil their objective, researchers examined these markers in early horse embryos, induced pluripotent stem cells (iPSCs), cells from the testes, adipose and bone marrow-derived mesenchymal stromal cells (MSCs), and keratinocytes (a type of skin cell).

Results and Key Findings

• The results showed that transcripts (the first step of gene expression where part of the DNA is copied into RNA) for all markers were most abundant in horse embryos and iPSCs.
• Except for the SOX2 marker, these transcripts were nearly absent or completely undetectable in keratinocytes. This suggests that keratinocytes have less pluripotent potential compared to embryos or iPSCs.
• On average, all marker expression levels were lower in testis than in embryos or iPSCs.
• With the exception of DNMT3B, marker expression levels were higher in testis than in MSCs. This suggests that the testis have a slightly higher potential for cell differentiation than MSCs.
• The study found that only OCT4, NANOG and DNMT3B markers were present in MSCs. This indicates that certain levels of pluripotency exist within these types of cells.
• Of all the markers studied, only LIN28A, REX1 and TERT were found exclusively in pluripotent cells in horses. This could suggest that these three markers are reliable indicators of pluripotency in horse cells.

Implications and Conclusion

• The research provides valuable insight for future studies into pluripotency and cell differentiation in equines, especially with the potential therapeutic uses of such cells.
• These results could have significant implications for regenerative medicine, tissue engineering, and other healthcare applications in veterinary practice.