CDK
CDK (Cyclin-dependent kinases) is a group of serine/threonine kinases. It is activated by binding to cyclin and participates in the regulation of cell cycle.
Most of the known cyclin-CDK complexes regulate the progression through the cell cycle. Animal cells contain at least nine CDKs, four of which, CDK1, 2, 3, and 4, are directly involved in cell cycle regulation. In mammalian cells, CDK1, with its partners cyclin A2 and B1, alone can drive the cell cycle. Another one, CDK7, is involved indirectly as the CDK-activating kinase. A cyclin-dependent kinase inhibitor (CKI) is a protein that interacts with a cyclin-CDK complex to block kinase activity, usually during G1 or in response to signals from the environment or from damaged DNA.
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S-Ruxolitinib是第一个应用到临床的，有效的，选择性JAK1/2抑制剂，IC50为3.3 nM/2.8 nM，作用于JAK1/2比作用于JAK3选择性高130倍以上。
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AT9283是一种有效的JAK2/3抑制剂，IC50为1.2 nM/1.1 nM；对Aurora A/B， Abl(T315I)也有效。
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Cerdulatinib (PRT-062070)是一种具有口服活性的多靶点酪氨酸激酶抑制剂，对JAK1/JAK2/JAK3/TYK2和Syk的IC50分别为12 nM/6 nM/8 nM/0.5 nM和32 nM。也能够抑制测试的其他19种激酶，IC50均低于200 nM。
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CEP-33779是JAK2新型选择性高效抑制剂，IC50值为1.8nM。
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AZ 960是一种新型的，ATP竞争性的JAK2抑制剂，IC50和Ki分别低于3 nM和0.45 nM，作用于JAK2比作用于JAK3选择性高3倍。
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