research Effects of immunosuppressive peptidyl-prolyl cis-trans isomerase (PPIase) inhibitors, cyclosporin A, FK506, ascomycin and rapamycin, on hair growth initiation in mouse: immunosuppression is not required for new hair growth
This study found that topical application of cyclosporin A and FK506 induces new hair growth in mice, while ascomycin and rapamycin do not, suggesting hair induction is not due to immunosuppression.