Rapamycin (Sirolimus, AY 22989) is a potent and specific blood-brain barrier-transmissible mTOR inhibitor with an IC50 of 0.1 nM in HEK293 cells. Rapamycin is a molecular glue that binds FKBP12 and mTOR proteins together, thereby inhibiting mTOR kinase activity. Rapamycin binds to FKBP12 and specifically acts as an allosteric inhibitor of mTORC1. Rapamycin is an autophagy activator, an immunosuppressant[1][2][3][4][5].
