Description:IC50 Value: 0.6 nM (Abl); 0.8 nM (Src) [1]Dasatinib is an oral multi- BCR/Abl and Src family tyrosine kinase inhibitor approved for first line use in patients with chronic myelogenous leukemia (CML) and Philadelphia chromosome-positive acute lymphoblastic leukemia(Ph+ ALL).in vitro: Dasatinib potently inhibits wild-type Abl kinase and all mutants except T315I over a narrow range. Dasatinib directly targets wild-type and mutant Abl kinase domains and inhibits autophosphorylation and substrate phosphorylation in a concentration-dependent manner. Dasatinib displays 325-fold greater potency compared with imatinib against cells expressing wild-type Bcr-Abl [1]. DSB and radiotherapy induced a significant growth delay in both HNSCC xenograft models, although to a lesser extent in SCCNij202. DSB did not inhibit phosphorylated protein kinase B (pAKT) or phosphorylated extracellular signal-regulated kinase 1/2 (pERK1/2) but did inhibit (phosphorylated) DNA-dependent protein kinase [2].in vivo: Daily oral administration of dasatinib delays tumour onset and increases overall survival but does not inhibit the proliferation of established tumours. The striking difference between the dasatinib-treated group of tumours and the vehicle controls was the prominent squamous metaplasia that was seen in six out of 11 dasatinib-treated tumours [3]. In vivo studies were performed in a nude mouse xenograft model, the new prescription (DDP + Dasatinib) was better than DDP alone in terms of therapeutic efficacy [4].Toxicity: Major cytogenetic response was significantly (P < 0.01) associated with weighted average steady-state dasatinib plasma concentrations, and pleural effusion was significantly associated with trough concentration [5]. We present a patient with chronic myelogenous leukemia who developed nephrotic-range proteinuria after initiation ondasatinib therapy that resolved after changing therapy to imatinib [6].Clinical trial: Dasatinib, Cytarabine, and Idarubicin in Treating Patients With High-Risk Acute Myeloid Leukemia. Phase 1/Phase 2