Imatinib

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Product Details:

  • CAS No: 152459-95-5
  • AHFC code: 10:00.00 92:00.00
  • Synonyms: Imatinib Mesylate Imatinib Methansulfonate STI-571
  • ATC Code: L01XE01
  • Chemical Formula: C19H16ClNO4
  • Molecular Weight: 493.6027
  • Assay/Purity: Typically NLT 98%
  • DrugBank: DB00619 (APRD01028, DB03261, EXPT02967)
  • SMILES: CN1CCN(CC2=CC=C(C=C2)C(=O)NC2=CC(NC3=NC=CC(=N3)C3=CN=CC=C3)=C(C)C=C2)CC1
  • InChl: KTUFNOKKBVMGRW-UHFFFAOYSA-N
  • PubChem: 5291
  • IUPAC: N-(4-methyl-3-{[4-(pyridin-3-yl)pyrimidin-2-yl]amino}phenyl)-4-[(4-methylpiperazin-1-yl)methyl]benzamide

Additional Details

Indication:
For the treatment Philadelphia chromosome positive chronic myeloid leukemia (CML) and malignant gastrointestinal stromal tumors (GIST).
Pharmacodynamics:
Imatinib is an antineoplastic agent used to treat chronic myelogenous leukemia. Imatinib is a 2-phenylaminopyrimidine derivative that functions as a specific inhibitor of a number of tyrosine kinase enzymes. In chronic myelogenous leukemia, the Philadelphia chromosome leads to a fusion protein of Abl with Bcr (breakpoint cluster region), termed Bcr-Abl. As this is now a continuously active tyrosine kinase, Imatinib is used to decrease Bcr-Abl activity.
Mode of Action:
Imatinib mesylate is a protein-tyrosine kinase inhibitor that inhibits the Bcr-Abl tyrosine kinase, the constitutive abnormal tyrosine kinase created by the Philadelphia chromosome abnormality in chronic myeloid leukemia (CML). It inhibits proliferation and induces apoptosis in Bcr-Abl positive cell lines as well as fresh leukemic cells from Philadelphia chromosome positive chronic myeloid leukemia. Imatinib also inhibits the receptor tyrosine kinases for platelet derived growth factor (PDGF) and stem cell factor (SCF) – called c-kit. Imatinib was identified in the late 1990s by Dr Brian J. Druker. Its development is an excellent example of rational drug design. Soon after identification of the bcr-abl target, the search for an inhibitor began. Chemists used a high-throughput screen of chemical libraries to identify the molecule 2-phenylaminopyrimidine. This lead compound was then tested and modified by the introduction of methyl and benzamide groups to give it enhanced binding properties, resulting in imatinib.
Metabolism:
Primarily hepatic via CYP3A4. Other cytochrome P450 enzymes, such as CYP1A2, CYP2D6, CYP2C9, and CYP2C19, play a minor role in its metabolism. The main circulating active metabolite in humans is the N-demethylated piperazine derivative, formed predominantly by CYP3A4.
Toxicity:
Side effects include nausea, vomiting, diarrhea, loss of appetite, dry skin, hair loss, swelling (especially in the legs or around the eyes) and muscle cramps
General Reference:
Deininger MW, Druker BJ: Specific targeted therapy of chronic myelogenous leukemia with imatinib. Pharmacol Rev. 2003 Sep;55(3):401-23. Epub 2003 Jul 17. Pubmed Vigneri P, Wang JY: Induction of apoptosis in chronic myelogenous leukemia cells through nuclear entrapment of BCR-ABL tyrosine kinase. Nat Med. 2001 Feb;7(2):228-34. Pubmed Droogendijk HJ, Kluin-Nelemans HJ, van Doormaal JJ, Oranje AP, van de Loosdrecht AA, van Daele PL: Imatinib mesylate in the treatment of systemic mastocytosis: a phase II trial. Cancer. 2006 Jul 15;107(2):345-51. Pubmed Lassila M, Allen TJ, Cao Z, Thallas V, Jandeleit-Dahm KA, Candido R, Cooper ME: Imatinib attenuates diabetes-associated atherosclerosis. Arterioscler Thromb Vasc Biol. 2004 May;24(5):935-42. Epub 2004 Feb 26. Pubmed Reeves PM, Bommarius B, Lebeis S, McNulty S, Christensen J, Swimm A, Chahroudi A, Chavan R, Feinberg MB, Veach D, Bornmann W, Sherman M, Kalman D: Disabling poxvirus pathogenesis by inhibition of Abl-family tyrosine kinases. Nat Med. 2005 Jul;11(7):731-9. Epub 2005 Jun 26. Pubmed
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