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Quizartinib — a Phase 2B trial treatment for acute myeloid leukemia

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quizartinib

Ambit Biosciences

 13 MAY 2013

Ambit Biosciences (NASDAQ:AMBI) is a biotech company that focuses on treatments that inhibit kinases, which are drivers for diseases such as cancer. Three drugs are in development, with the lead one being quizartinib — a Phase 2B trial treatment for acute myeloid leukemia.

However, AMBI’s collaboration agreement with Astellas Pharma (OTC:ALPMY) is set to expire in September, and if it is not replaced, it could mean a delay in Phase 3 trials for quizartinib. Keep in mind that AMBI generated $23.8 million in collaboration revenues last year.

 

Quizartinib (AC220) is a small molecule receptor tyrosine kinase inhibitor that is currently under development for the treatment of acute myeloid leukaemia. Its molecular target isFLT3, also known as CD135 which is a proto-oncogene.[1]

Flt3 mutations are among the most common mutations in acute myeloid leukaemia due tointernal tandem duplication of Flt3. The presence of this mutation is a marker of adverse outcome.

Specifically, Quizartinib selectively inhibits class III receptor tyrosine kinases, including FMS-related tyrosine kinase 3 (FLT3/STK1), colony-stimulating factor 1 receptor (CSF1R/FMS), stem cell factor receptor (SCFR/KIT), and platelet derived growth factor receptors (PDGFRs).Mutations cause constitutive action of Flt3 leading to resulting in inhibition of ligand-independent leukemic cell proliferation and apoptosis

It had good results in a phase II clinical trial for refractory AML – particularly in patients who went on to have a stem cell transplant.[2]

 

  1.  Chao, Qi; Sprankle, Kelly G.; Grotzfeld, Robert M.; Lai, Andiliy G.; Carter, Todd A.; Velasco, Anne Marie; Gunawardane, Ruwanthi N.; Cramer, Merryl D.; Gardner, Michael F.; James, Joyce; Zarrinkar, Patrick P.; Patel, Hitesh K.; Bhagwat, Shripad S. (2009). “Identification of N-(5-tert-Butyl-isoxazol-3-yl)-N’-{4-[7-(2-morpholin-4-yl-ethoxy)imidazo[2,1-b][1,3]benzothiazol-2-yl]phenyl}urea Dihydrochloride (AC220), a Uniquely Potent, Selective, and Efficacious FMS-Like Tyrosine Kinase-3 (FLT3) Inhibitor”. Journal of Medicinal Chemistry 52 (23): 7808–7816.
  2.  Drug Tames Refractory AML. ASH Dec 2012

 


3 Comments

  1. […] Quizartinib — a Phase 2B trial treatment for acute myeloid leukemia. […]

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DR ANTHONY CRASTO

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DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO, Born in Mumbai in 1964 and graduated from Mumbai University, Completed his Ph.D from ICT, 1991,Matunga, Mumbai, India, in Organic Chemistry, The thesis topic was Synthesis of Novel Pyrethroid Analogues, Currently he is working with GLENMARK PHARMACEUTICALS LTD, Research Centre as Principal Scientist, Process Research (bulk actives) at Mahape, Navi Mumbai, India. Total Industry exp 30 plus yrs, Prior to joining Glenmark, he has worked with major multinationals like Hoechst Marion Roussel, now Sanofi, Searle India Ltd, now RPG lifesciences, etc. He has worked with notable scientists like Dr K Nagarajan, Dr Ralph Stapel, Prof S Seshadri, Dr T.V. Radhakrishnan and Dr B. K. Kulkarni, etc, He did custom synthesis for major multinationals in his career like BASF, Novartis, Sanofi, etc., He has worked in Discovery, Natural products, Bulk drugs, Generics, Intermediates, Fine chemicals, Neutraceuticals, GMP, Scaleups, etc, he is now helping millions, has 9 million plus hits on Google on all Organic chemistry websites. His friends call him Open superstar worlddrugtracker. His New Drug Approvals, Green Chemistry International, All about drugs, Eurekamoments, Organic spectroscopy international, etc in organic chemistry are some most read blogs He has hands on experience in initiation and developing novel routes for drug molecules and implementation them on commercial scale over a 30 year tenure till date Dec 2017, Around 35 plus products in his career. He has good knowledge of IPM, GMP, Regulatory aspects, he has several International patents published worldwide . He has good proficiency in Technology transfer, Spectroscopy, Stereochemistry, Synthesis, Polymorphism etc., He suffered a paralytic stroke/ Acute Transverse mylitis in Dec 2007 and is 90 %Paralysed, He is bound to a wheelchair, this seems to have injected feul in him to help chemists all around the world, he is more active than before and is pushing boundaries, He has 9 million plus hits on Google, 2.5 lakh plus connections on all networking sites, 50 Lakh plus views on dozen plus blogs, He makes himself available to all, contact him on +91 9323115463, email amcrasto@gmail.com, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 19 lakh plus views on New Drug Approvals Blog in 216 countries......https://newdrugapprovals.wordpress.com/ , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc

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