TG101348(SAR302503)

Fedratinib (TG-101348) is a selective inhibitor of JAK2 with an IC50 of 3 nM, showing 35- and 334-fold selectivity over JAK1 and JAK3, respectively.
N-tert-butyl-3-[[5-methyl-2-[4-[2-(1-pyrrolidinyl)ethoxy]anilino]-4-pyrimidinyl]amino]benzenesulfonamide is a sulfonamide.|Fedratinib, also known as SAR302503 and TG101348, is a tyrosine kinase inhibitor used to treat intermediate-2 and high risk primary and secondary myelofibrosis. It is an anilinopyrimidine derivative. Fedratinib was granted FDA approval on August 16, 2019.|Fedratinib is an oral selective inhibitor of Janus associated kinase 2 (JAK-2) and FMS-like tyrosine kinase 3 (FLT3) that is used in the therapy of intermediate or high-risk, primary or secondary myelofibrosis. Fedratinib has been associated with a high rate of serum enzyme elevations during therapy, but has been associated with only rare instances of clinically apparent acute liver injury.|Fedratinib is an orally bioavailable, small-molecule, ATP-competitive inhibitor of Janus-associated kinase 2 (JAK2) and FMS-like tyrosine kinase 3 (FLT3; CD135; STK1; FLK2), with potential antineoplastic activity. Upon oral administration, fedratinib competes with wild-type JAK2 as well as mutated forms for ATP binding, which may result in inhibition of JAK2 activation, inhibition of the JAK-STAT signaling pathway, inhibition of tumor cell proliferation and induction of tumor cell apoptosis. JAK2 is the most commonly mutated gene in bcr-abl-negative myeloproliferative disorders (MPDs). In addition, fedratinib targets, binds to and inhibits the activity of FLT3. This inhibits uncontrolled FLT3 signaling and results in the inhibition of proliferation in tumor cells overexpressing FLT3. FLT3, a class III receptor tyrosine kinase (RTK), is overexpressed or mutated in most B-lineage neoplasms and in acute myeloid leukemias and plays a key role in tumor cell proliferation.