Differential Expression of MITF, WNT3A, SLC7A11, and EDN3 in the Shoulder Bider Marking of Dun Mongolian Horses

This study examines the molecular mechanisms behind the 'Bider marking' pigmentation in Dun Mongolian horses, focusing on the expression of MITF, WNT3A, SLC7A11, and EDN3 genes. The research found that MITF and WNT3A proteins are significantly more expressed in the dark-colored areas of the marking, indicating their crucial role in pigmentation. In contrast, SLC7A11 and EDN3 did not show consistent expression patterns, suggesting they are not primary regulators of this trait. The study highlights the complex regulatory network of these proteins and suggests that genetic factors may be part of an adaptive response to environmental pressures. However, the small sample size of 3 horses per group limits the generalizability of the results, necessitating further research.