Effect of rifampin on the pharmacokinetics of bosutinib, a dual Src/Abl tyrosine kinase inhibitor, when administered concomitantly to healthy subjects

Author(s):  
Richat Abbas ◽  
Joseph Boni ◽  
Daryl Sonnichsen

AbstractBosutinib is an orally bioavailable dual Src/Abl tyrosine kinase inhibitor and a CYP3A4 enzyme substrate. This study assessed the safety, tolerability, and pharmacokinetics of bosutinib when coadministered with the CYP3A4 inducer rifampin in 24 healthy men.Subjects received single oral doses of bosutinib 500 mg (Days 1 and 14) and once-daily oral doses of rifampin 600 mg (Days 8–17); serial blood samples were analyzed.Bosutinib exposures were reduced following concomitant administration of rifampin vs. bosutinib alone, measured by peak plasma concentration (CConcomitant use of potent or moderate CYP3A inducers with bosutinib should be avoided because of the effects of drug-drug interaction observed between bosutinib and rifampin.

Blood ◽  
2000 ◽  
Vol 96 (9) ◽  
pp. 3195-3199 ◽  
Author(s):  
J. Tyler Thiesing ◽  
Sayuri Ohno-Jones ◽  
Kathryn S. Kolibaba ◽  
Brian J. Druker

Abstract Chronic myelogenous leukemia (CML), a malignancy of a hematopoietic stem cell, is caused by the Bcr-Abl tyrosine kinase. STI571(formerly CGP 57148B), an Abl tyrosine kinase inhibitor, has specific in vitro antileukemic activity against Bcr-Abl–positive cells and is currently in Phase II clinical trials. As it is likely that resistance to a single agent would be observed, combinations of STI571 with other antileukemic agents have been evaluated for activity against Bcr-Abl–positive cell lines and in colony-forming assays in vitro. The specific antileukemic agents tested included several agents currently used for the treatment of CML: interferon-alpha (IFN), hydroxyurea (HU), daunorubicin (DNR), and cytosine arabinoside (Ara-C). In proliferation assays that use Bcr-Abl–expressing cells lines, the combination of STI571 with IFN, DNR, and Ara-C showed additive or synergistic effects, whereas the combination of STI571 and HU demonstrated antagonistic effects. However, in colony-forming assays that use CML patient samples, all combinations showed increased antiproliferative effects as compared with STI571 alone. These data indicate that combinations of STI571 with IFN, DNR, or Ara-C may be more useful than STI571 alone in the treatment of CML and suggest consideration of clinical trials of these combinations.


2011 ◽  
Vol 18 (4) ◽  
pp. 1092-1100 ◽  
Author(s):  
Adil I. Daud ◽  
Smitha S. Krishnamurthi ◽  
Mansoor N. Saleh ◽  
Barbara J. Gitlitz ◽  
Mitesh J. Borad ◽  
...  

2020 ◽  
Vol 22 (4) ◽  
pp. 678-682 ◽  
Author(s):  
Syed O. Amin ◽  
Marcel Ruzicka ◽  
Kevin D. Burns ◽  
Isabelle A. Bence‐Bruckler ◽  
Stephen E. Ryan ◽  
...  

Blood ◽  
2007 ◽  
Vol 110 (10) ◽  
pp. 3540-3546 ◽  
Author(s):  
Hagop M. Kantarjian ◽  
Francis Giles ◽  
Norbert Gattermann ◽  
Kapil Bhalla ◽  
Giuliana Alimena ◽  
...  

Abstract Nilotinib, an orally bioavailable, selective Bcr-Abl tyrosine kinase inhibitor, is 30-fold more potent than imatinib in pre-clinical models, and overcomes most imatinib resistant BCR-ABL mutations. In this phase 2 open-label study, 400 mg nilotinib was administered orally twice daily to 280 patients with Philadelphia chromosome–positive (Ph+) chronic myeloid leukemia in chronic phase (CML-CP) after imatinib failure or intolerance. Patients had at least 6 months of follow-up and were evaluated for hematologic and cytogenetic responses, as well as for safety and overall survival. At 6 months, the rate of major cytogenetic response (Ph ≤ 35%) was 48%: complete (Ph = 0%) in 31%, and partial (Ph = 1%-35%) in 16%. The estimated survival at 12 months was 95%. Nilotinib was effective in patients harboring BCR-ABL mutations associated with imatinib resistance (except T315I), and also in patients with a resistance mechanism independent of BCR-ABL mutations. Adverse events were mostly mild to moderate, and there was minimal cross-intolerance with imatinib. Grades 3 to 4 neutropenia and thrombocytopenia were observed in 29% of patients; pleural or pericardial effusions were observed in 1% (none were severe). In summary, nilotinib is highly active and safe in patients with CML-CP after imatinib failure or intolerance. This clinical trial is registered at http://clinicaltrials.gov as ID no. NCT00109707.


Blood ◽  
2008 ◽  
Vol 111 (4) ◽  
pp. 1834-1839 ◽  
Author(s):  
Philipp le Coutre ◽  
Oliver G. Ottmann ◽  
Francis Giles ◽  
Dong-Wook Kim ◽  
Jorge Cortes ◽  
...  

Patients with imatinib-resistant or -intolerant accelerated-phase chronic myelogenous leukemia (CML-AP) have very limited therapeutic options. Nilotinib is a highly selective BCR-ABL tyrosine kinase inhibitor. This phase 2 trial was designed to characterize the efficacy and safety of nilotinib (400 mg twice daily) in this patient population with hematologic response (HR) as primary efficacy endpoint. A total of 119 patients were enrolled and had a median duration of treatment of 202 days (range, 2–611 days). An HR was observed in 56 patients (47%; 95% confidence interval [CI], 38%-56%). Major cytogenetic response (MCyR) was observed in 35 patients (29%; 95% CI, 21%-39%). The median duration of HR has not been reached. Overall survival rate among the 119 patients after 12 months of follow-up was 79% (95% CI, 70%-87%). Nonhematologic adverse events were mostly mild to moderate. Severe peripheral edema and pleural effusions were not observed. The most common grade 3 or higher hematologic adverse events were thrombocytopenia (35%) and neutropenia (21%). Grade 3 or higher bilirubin and lipase elevations occurred in 9% and 18% of patients, respectively, resulting in treatment discontinuation in one patient. In conclusion, nilotinib is an effective and well-tolerated treatment in imatinib-resistant and -intolerant CML-AP. This trial is registered at www.clinicaltrials.gov as NCT00384228.


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