Rapamycin is a drug that calms down the immune system. It works by hooking onto a specific protein inside cells, which then locks onto and shuts down a key growth switch called mTOR, preventing immune cells called T-cells from dividing and multiplying.

The study is about rapamycin (same drug), and it mentions rapamycin as an immunosuppressant and talks about mTOR, which is related to the claim. However, the available abstract is too short and unclear to confirm whether it specifically tests the exact mechanism (FKBP-12 complex formation and T-cell cycle blocking) described in the claim.