Abstract |
The leflunomide (CAS 75706-12-6) metabolite (LFM) analog alpha-cyano-beta-hydroxy-beta-methyl-N-(2,5-dibromophenyl)-propenamide (LFM-A13, DDE-28, CAS 244240-24-2) is a rationally-designed specific inhibitor of the TEC family protein tyrosine kinase, Bruton's tyrosine kinase (BTK). LFM-A13 exhibited favorable pharmacokinetics in CD-1 mice, BALB/c mice, rats, and dogs. The intraperitoneal bioavailability was estimated to be -100%, while the oral bioavailability was -30%. LFM-A13 enters, but does not bind to multiple tissues followed by a rapid elimination from most of the tissues. Limited distribution of LFM-A13 to extravascular tissues and its corresponding low volume of distribution could be attributed to its plasma protein binding. LFM-A13 was not toxic to mice, rats, or dogs at daily dose levels as high as 100 mg/kg. LFM-A13 formulated as a suspension and hard gelatin capsules for oral administration showed a rapid absorption and favorable pharmacokinetic features. These preclinical research studies provide the basis for future pre-IND studies and clinicaldevelopment of LFM-A13 as an intravenously or orally administered new anti- leukemia agent targeting BTK.
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Authors | Fatih M Uckun, Heather Tibbles, Taracad Venkatachalam, Darin DuMez, Douglas Erbeck |
Journal | Arzneimittel-Forschung
(Arzneimittelforschung)
Vol. 57
Issue 1
Pg. 31-46
( 2007)
ISSN: 0004-4172 [Print] Germany |
PMID | 17341007
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
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Chemical References |
- Amides
- Antineoplastic Agents
- Capsules
- Excipients
- LFM A13
- Nitriles
- Suspensions
- Gelatin
- Protein-Tyrosine Kinases
- Agammaglobulinaemia Tyrosine Kinase
- Btk protein, mouse
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Topics |
- Agammaglobulinaemia Tyrosine Kinase
- Amides
(administration & dosage, pharmacokinetics, toxicity)
- Animals
- Antineoplastic Agents
(administration & dosage, pharmacokinetics, toxicity)
- Capsules
- Chromatography, High Pressure Liquid
- Dogs
- Excipients
- Female
- Gelatin
- Injections, Intravenous
- Intestinal Absorption
- Leukemia
(drug therapy)
- Male
- Mice
- Mice, Inbred BALB C
- Nitriles
(administration & dosage, pharmacokinetics, toxicity)
- Protein-Tyrosine Kinases
(antagonists & inhibitors)
- Rats
- Rats, Inbred Lew
- Suspensions
- Tissue Distribution
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