Is Wnt5a Overexpression Sufficient for Generating a Psoriasis-Like Phenotype in Transgenic Mice?

The study investigated whether overexpression of Wnt5a in transgenic mice could induce a psoriasis-like phenotype. Despite initial expectations, the Wnt5a transgenic mice did not exhibit psoriasis symptoms, such as inflamed hyperkeratotic plaques, and their skin appeared normal. This discrepancy was attributed to differences in epidermal differentiation and immune systems between humans and mice. However, the transgenic mice showed impaired hair follicle transition from telogen to anagen, suggesting that Wnt5a plays a role in hair follicle cycling. The findings indicated that Wnt5a and its inhibitors might be more relevant for treating hair disorders like alopecia rather than psoriasis, though further clinical studies were needed to confirm their potential applications.