PMID- 24965573 OWN - NLM STAT- MEDLINE DCOM- 20150714 LR - 20211203 IS - 1552-4604 (Electronic) IS - 0091-2700 (Linking) VI - 54 IP - 12 DP - 2014 Dec TI - The pharmacokinetics, pharmacodynamics, and safety of baricitinib, an oral JAK 1/2 inhibitor, in healthy volunteers. PG - 1354-61 LID - 10.1002/jcph.354 [doi] AB - Baricitinib (also known as LY3009104 or INCB028050), a novel and potent small molecule inhibitor of Janus kinase family of enzymes (JAKs) with selectivity for JAK1 and JAK2, is currently in clinical development for the treatment of rheumatoid arthritis (RA) and other inflammatory disorders. Two double-blind, randomized, and placebo-controlled studies were conducted to evaluate single ascending doses of 1-20 mg and multiple ascending doses of 2-20 mg QD and 5 mg BID for 10 or 28 days in healthy volunteers. Following oral administration, baricitinib plasma concentration typically attains its peak value within 1.5 hours postdose and subsequently declines in a bi-exponential fashion. Baricitinib demonstrates dose-linear and time-invariant pharmacokinetics, with low oral-dose clearance (17 L/h) and minimal systemic accumulation observed following repeat dosing. The mean renal clearance of baricitinib was determined to be approximately 2 L/h. The effect of a high-fat meal on baricitinib pharmacokinetics was insignificant. The pharmacodynamics of baricitinib, evaluated by the inhibition of STAT3 phosphorylation following cytokine stimulation in the whole blood ex vivo, was well correlated with baricitinib plasma concentrations. Baricitinib was generally safe and well tolerated, with no serious treatment-related adverse events (AEs) reported from either of the studies. An expected rapidly reversible, dose-related decline in absolute neutrophil count was seen with baricitinib. CI - (c) 2014, The American College of Clinical Pharmacology. FAU - Shi, Jack G AU - Shi JG AD - From Incyte Corporation, Wilmington, DE, USA. FAU - Chen, Xuejun AU - Chen X FAU - Lee, Fiona AU - Lee F FAU - Emm, Thomas AU - Emm T FAU - Scherle, Peggy A AU - Scherle PA FAU - Lo, Yvonne AU - Lo Y FAU - Punwani, Naresh AU - Punwani N FAU - Williams, William V AU - Williams WV FAU - Yeleswaram, Swamy AU - Yeleswaram S LA - eng PT - Clinical Trial, Phase I PT - Journal Article PT - Randomized Controlled Trial PL - England TA - J Clin Pharmacol JT - Journal of clinical pharmacology JID - 0366372 RN - 0 (Azetidines) RN - 0 (Protein Kinase Inhibitors) RN - 0 (Purines) RN - 0 (Pyrazoles) RN - 0 (STAT3 Transcription Factor) RN - 0 (STAT3 protein, human) RN - 0 (Sulfonamides) RN - EC 2.7.10.2 (JAK1 protein, human) RN - EC 2.7.10.2 (JAK2 protein, human) RN - EC 2.7.10.2 (Janus Kinase 1) RN - EC 2.7.10.2 (Janus Kinase 2) RN - ISP4442I3Y (baricitinib) SB - IM MH - Adolescent MH - Adult MH - *Azetidines/adverse effects/blood/pharmacokinetics/pharmacology MH - Dose-Response Relationship, Drug MH - Double-Blind Method MH - Female MH - Food-Drug Interactions MH - Healthy Volunteers MH - Humans MH - Janus Kinase 1/antagonists & inhibitors MH - Janus Kinase 2/antagonists & inhibitors MH - Male MH - Middle Aged MH - *Protein Kinase Inhibitors/adverse effects/blood/pharmacokinetics/pharmacology MH - Purines MH - Pyrazoles MH - STAT3 Transcription Factor/antagonists & inhibitors MH - *Sulfonamides/adverse effects/blood/pharmacokinetics/pharmacology MH - Young Adult OTO - NOTNLM OT - JAK OT - baricitinib OT - pharmacodynamics OT - pharmacokinetics OT - rheumatoid arthritis EDAT- 2014/06/27 06:00 MHDA- 2015/07/15 06:00 CRDT- 2014/06/27 06:00 PHST- 2014/05/12 00:00 [received] PHST- 2014/06/23 00:00 [accepted] PHST- 2014/06/27 06:00 [entrez] PHST- 2014/06/27 06:00 [pubmed] PHST- 2015/07/15 06:00 [medline] AID - 10.1002/jcph.354 [doi] PST - ppublish SO - J Clin Pharmacol. 2014 Dec;54(12):1354-61. doi: 10.1002/jcph.354.