Ligand id: 5890

Name: ponatinib

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Structure and Physico-chemical Properties

2D Structure
Calculated Physico-chemical Properties
Hydrogen bond acceptors 7
Hydrogen bond donors 1
Rotatable bonds 6
Topological polar surface area 65.77
Molecular weight 532.22
XLogP 6.33
No. Lipinski's rules broken 1

Molecular properties generated using the CDK

No information available.
Summary of Clinical Use
Ponatinib is a multi-targeted tyrosine-kinase inhibitor approved for the treatment of adult patients with chronic phase, accelerated phase, or blast phase chronic myeloid leukemia (CML) or Philadelphia chromosome positive acute lymphoblastic leukemia (Ph+ALL) that is resistant or intolerant to prior tyrosine kinase inhibitor therapy. For example, cases of CML which have the T315I mutation, are resistant to current therapies such as imatinib so ponatinib has been designed to be effective against these types of tumours. Final 5-year results of safety and efficacy in Ph+ leukemia as evaluated in Phase 2 study NCT01207440 are reported by Cortes et al. (2018) [1]. This analysis concludes that ponatinib is an effective treatment that produces durable and clinically significant responses, but also, that the risk of AOEs should be considered on a patient-by-patient basis to fully inform the decision to treat with ponatinib.
Mechanism Of Action and Pharmacodynamic Effects
The primary target for ponatinib is BCR-Abl, the abnormal tyrosine kinase that is the hallmark of CML and Ph+ALL. Ponatinib also inhibits the in vitro activity of other kinases including several receptor tyrosine kinases (eg KIT, RET, TIE2, and FLT3) and Src familiy kinases, at nanomolar concentrations.
The absolute bioavailability of ponatinib is unknown. Peak concentrations of ponatinib are reached within 6 hours following oral administration. This drug can be taken with or without food. More than 99% of circulating ponatinib is bound to plasma proteins.
In vitro studies show that CYP3A4 and to a lesser extent CYP2C8, CYP2D6 and CYP3A5 are involved in phase I metabolism of ponatinib and in total (phase I + phase II) more than 64% of a ponatinib dose is metabolised. Ponatinib is also metabolized by esterases and/or amidases.
Ponatinib is mainly eliminated via feces (87%) and a minor amount is eliminated in the urine (5%).
Organ function impairment
As hepatic elimination is a major route of excretion, hepatic impairment may result in increased exposure to ponatinib. Use should therefore be avoided in patients with moderate to severe (Child-Pugh B or C) hepatic impairment unless the benefit outweighs the possible risk of ponatinib overexposure. Although renal excretion is not a major route of ponatinib elimination, the potential for moderate or severe renal impairment to affect hepatic elimination has not been determined
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