title: Rapamycin: something old, something new, sometimes borrowed and now renewed.
abstract: The molecular target of rapamycin (mTOR) is central to a complex intracellular signaling pathway and is involved in diverse processes including cell growth and proliferation, angiogenesis, autophagy, and metabolism. Although sirolimus (rapamycin), the oldest inhibitor of mTOR, was discovered more than 30 years ago, renewed interest in this pathway is evident by the numerous rapalogs recently developed. These newer agents borrow from the structure of sirolimus and, although there are some pharmacokinetic differences, they appear to differ little in terms of pharmacodynamic effects and overall tolerability. Given the multitude of potential applications for this class of agents and the decrease in cost that can be expected upon the expiration of sirolimus patents, renewed focus on this agent is warranted.
authors.affiliation: Committee on Clinical Pharmacology and Pharmacogenomics, The University of Chicago, Chicago, Illinois, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Hartford
authors.forename: M J
authors.initials: MJ
authors.lastname: Ratain
mesh_terms: D000818:Animals; D000935:Antifungal Agents / Q000009:adverse effects / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology*; D000970:Antineoplastic Agents / Q000009:adverse effects / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology*; D015195:Drug Design; D004347:Drug Interactions; D000068338:Everolimus; D006801:Humans; D007166:Immunosuppressive Agents / Q000009:adverse effects / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology*; D015394:Molecular Structure; D011494:Protein Kinases / Q000187:drug effects; D015398:Signal Transduction / Q000187:drug effects; D020123:Sirolimus / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology*; D013329:Structure-Activity Relationship; D058570:TOR Serine-Threonine Kinases
chemical_list: D000935:Antifungal Agents; D000970:Antineoplastic Agents; D007166:Immunosuppressive Agents; C401859:temsirolimus; D000068338:Everolimus; D011494:Protein Kinases; C546842:MTOR protein, human; D058570:TOR Serine-Threonine Kinases; D020123:Sirolimus