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Hoch M, Huth F, Sato M, Sengupta T, Quinlan M, Dodd S, Kapoor S, Hourcade-Potelleret F. Pharmacokinetics of asciminib in the presence of CYP3A or P-gp inhibitors, CYP3A inducers, and acid-reducing agents. Clin Transl Sci 2022; 15:1698-1712. [PMID: 35616006 PMCID: PMC9283742 DOI: 10.1111/cts.13285] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 03/14/2022] [Accepted: 04/06/2022] [Indexed: 12/16/2022] Open
Abstract
Asciminib is a first‐in‐class inhibitor of BCR::ABL1, specifically targeting the ABL myristoyl pocket. Asciminib is a substrate of CYP3A4 and P‐glycoprotein (P‐gp) and possesses pH‐dependent solubility in aqueous solution. This report summarizes the results of two phase I studies in healthy subjects aimed at assessing the impact of CYP3A and P‐gp inhibitors, CYP3A inducers and acid‐reducing agents (ARAs) on the pharmacokinetics (PK) of asciminib (single dose of 40 mg). Asciminib exposure (area under the curve [AUC]) unexpectedly decreased by ~40% when administered concomitantly with the strong CYP3A inhibitor itraconazole oral solution, whereas maximum plasma concentration (Cmax) decreased by ~50%. However, asciminib exposure was slightly increased in subjects receiving an itraconazole capsule (~3%) or clarithromycin (~35%), another strong CYP3A inhibitor. Macroflux studies showed that cyclodextrin (present in high quantities as excipient [40‐fold excess to itraconazole] in the oral solution formulation of itraconazole) decreased asciminib flux through a lipid membrane by ~80%. The AUC of asciminib was marginally decreased by concomitant administration with the strong CYP3A inducer rifampicin (by ~13–15%) and the strong P‐gp inhibitor quinidine (by ~13–16%). Concomitant administration of the ARA rabeprazole had little or no effect on asciminib AUC, with a 9% decrease in Cmax. The treatments were generally well tolerated. Taking into account the large therapeutic window of asciminib, the observed changes in asciminib PK following multiple doses of P‐gp, CYP3A inhibitors, CYP3A inducers, or ARAs are not considered to be clinically meaningful. Care should be exercised when administering asciminib concomitantly with cyclodextrin‐containing drug formulations.
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Affiliation(s)
- Matthias Hoch
- Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Felix Huth
- Novartis Institutes for BioMedical Research, Basel, Switzerland
| | - Masahiko Sato
- Novartis Pharma K.K., Novartis Institutes for Biomedical Research, Tokyo, Japan
| | | | | | - Stephanie Dodd
- Novartis Institutes for BioMedical Research, Cambridge, Massachusetts, USA
| | - Shruti Kapoor
- Novartis Pharmaceuticals, East Hanover, New Jersey, USA
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García-Gutiérrez V, Hernández-Boluda JCA. An evaluation of asciminib for patients with chronic myeloid leukemia previously treated with ≥2 Tyrosine Kinase Inhibitors. Expert Rev Hematol 2022; 15:477-484. [PMID: 35583386 DOI: 10.1080/17474086.2022.2080049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION : To date, five tyrosine kinase inhibitors (TKIs) are available for treating chronic myeloid leukemia (CML) patients in clinical practice. Despite this, a significant proportion of patients will ultimately develop failure to approved TKIs due to intolerance or resistance. Consequently, new treatment approaches are still required in this unmet clinical need. Asciminib, a first-in-class BCR::ABL1 inhibitor Specifically Targeting the ABL Myristoyl Pocket (STAMP), has the potential to overcome resistance/intolerance to prior TKI treatment. AREAS COVERED This review will cover the mechanism of action, pharmacokinetic profile and clinical data of asciminib based on available information from laboratory studies, clinical trials and real world evidence. EXPERT OPINION Recent approval of asciminib will require positioning of this drug in the treatment algorithm of CML patients failing initial TKI therapy. Available data support the lack of cross-intolerance of asciminib with other TKIs and its favorable cardiovascular toxicity profile. In addition, asciminib has demonstrated considerable efficacy in CML patients who have failed at least two TKIs, although preliminary data suggest that this efficacy may be lower in those previously exposed to ponatinib. The introduction of asciminib in clinical practice may represent an important step forward in the management of CML.
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Affiliation(s)
- Valentin García-Gutiérrez
- Servicio de Hematología, Hospital Universitario Ramón y Cajal. IRYCIS. Universidad de Alcalá. Madrid, Spain
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Hoch M, Zack J, Quinlan M, Huth F, Forte S, Dodd S, Aimone P, Hourcade-Potelleret F. Pharmacokinetics of Asciminib When Taken With Imatinib or With Food. Clin Pharmacol Drug Dev 2021; 11:207-219. [PMID: 34609077 DOI: 10.1002/cpdd.1019] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/03/2021] [Indexed: 12/17/2022]
Abstract
Asciminib, a first-in-class, Specifically Targeting the Abelson kinase Myristoyl Pocket (STAMP) inhibitor with the potential to overcome resistance to adenosine triphosphate-competitive tyrosine kinase inhibitors, is being investigated in leukemia as monotherapy and in combination with tyrosine kinase inhibitors including imatinib. This phase 1 study in healthy volunteers assessed the pharmacokinetics of asciminib (40 mg single dose) under 2 conditions: when taken with imatinib (steady state; 400 mg once daily) and a low-fat meal (according to imatinib prescription information), or when taken as single-agent under different food conditions. Asciminib plus imatinib with a low-fat meal increased asciminib area under the plasma concentration-time curve from time 0 to infinity and maximum plasma concentration (geometric mean ratios [90% confidence interval], 2.08 [1.93-2.24] and 1.59 [1.45-1.75], respectively) compared with asciminib alone under the same food conditions. Asciminib plus food decreased asciminib area under the plasma concentration-time curve from time 0 to infinity compared with asciminib taken under fasted conditions (geometric mean ratios: low-fat meal, 0.7 [0.631-0.776]; high-fat meal, 0.377 [0.341-0.417]). Asciminib plus imatinib was well tolerated with no new safety signals. Overall, coadministration of asciminib with imatinib and a low-fat meal results in a moderate increase in asciminib exposure compared with asciminib alone under the same food condition. Food itself decreases asciminib exposure, indicating that single-agent asciminib should be administered in the fasted state to prevent potential suboptimal exposures.
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Affiliation(s)
- Matthias Hoch
- Novartis Pharma AG, Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Julia Zack
- Novartis Pharmaceuticals, East Hanover, New Jersey, USA
| | | | - Felix Huth
- Novartis Pharma AG, Novartis Institutes for Biomedical Research, Basel, Switzerland
| | | | - Stephanie Dodd
- Novartis Pharmaceuticals, Novartis Institutes for Biomedical Research, Cambridge, Massachusetts, USA
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Sharma S, Prasad B. Meta-Analysis of Food Effect on Oral Absorption of Efflux Transporter Substrate Drugs: Does Delayed Gastric Emptying Influence Drug Transport Kinetics? Pharmaceutics 2021; 13:1035. [PMID: 34371727 PMCID: PMC8309017 DOI: 10.3390/pharmaceutics13071035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/02/2021] [Accepted: 07/04/2021] [Indexed: 01/07/2023] Open
Abstract
The oral route of drug administration is the most convenient method of drug delivery, but it is associated with variable bioavailability. Food is one of the major factors that affect oral drug absorption by influencing drug properties (e.g., solubility and dissolution rate) and physiological factors (e.g., metabolism and transport across the gastrointestinal tract). The aim of this work was to investigate the effect of food on the high-affinity intestinal efflux transporter substrate drugs. We hypothesized that transport efficiency is higher in the fed state as compared to the fasted state because of the lower intestinal lumen drug concentration due to prolonged gastric emptying time. A systematic analysis of reported clinical food-effect (FE) studies on 311 drugs was performed and the association of the efflux transport efficiency was investigated on the FE magnitude, i.e., changes in maximal plasma concentration and area under the plasma concentration-time profile curve for both solubility and permeability-limited drugs. In total, 124 and 88 drugs showed positive and negative FE, respectively, whereas 99 showed no FE. As expected, the solubility-limited drugs showed positive FE, but interestingly, drugs with a high potential for efflux transport, were associated with negative FE. Moreover, a high-fat diet was associated with a higher magnitude of negative FE for high-affinity efflux transporter substrates as compared to a low-fat diet. To account for changes in drug absorption after food intake, the prolonged gastric emptying time should be considered in the physiologically based pharmacokinetic (PBPK) modeling of orally absorbed efflux transporter substrate drugs.
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Affiliation(s)
- Sheena Sharma
- Department of Pharmaceutical Sciences, Washington State University, 412 E Spokane Falls Blvd, Spokane, WA 99202, USA
| | - Bhagwat Prasad
- Department of Pharmaceutical Sciences, Washington State University, 412 E Spokane Falls Blvd, Spokane, WA 99202, USA
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Hoch M, Sato M, Zack J, Quinlan M, Sengupta T, Allepuz A, Aimone P, Hourcade-Potelleret F. Pharmacokinetics of Asciminib in Individuals With Hepatic or Renal Impairment. J Clin Pharmacol 2021; 61:1454-1465. [PMID: 34115385 DOI: 10.1002/jcph.1926] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/12/2021] [Accepted: 06/08/2021] [Indexed: 12/17/2022]
Abstract
Asciminib is an investigational, first-in-class, specifically targeting the ABL myristoyl pocket (STAMP) inhibitor of BCR-ABL1 with a new mechanism of action compared with approved ATP-competitive tyrosine kinase inhibitors. This report describes the findings from 2 phase 1 studies assessing the pharmacokinetic (PK) profile of a single dose of asciminib (40 mg) in individuals with impaired renal function (based on absolute glomerular filtration rate; NCT03605277) or impaired hepatic function (based on Child-Pugh classification; NCT02857868). Individuals with severe renal impairment exhibited 49%-56% higher exposure (area under the curve [AUC]), with similar maximum plasma concentration (Cmax ), than matched healthy controls. Based on these findings, as per the protocol, the PK of asciminib in individuals with mild or moderate renal impairment was not assessed. In individuals with mild and severe hepatic impairment, asciminib AUC was 21%-22% and 55%-66% higher, respectively, and Cmax was 26% and 29% higher, respectively, compared with individuals with normal hepatic function. Individuals with moderate hepatic impairment had similar asciminib AUC and Cmax than matched healthy controls. The increase in asciminib AUC and Cmax in the mild hepatic impairment cohort was mainly driven by 1 participant with particularly high exposure. Asciminib was generally well tolerated, and the safety data were consistent with its known safety profile. In summary, these findings indicate that renal or hepatic impairment has no clinically meaningful effect on the exposure or safety profile of asciminib, and support its use in patients with varying degrees of renal or hepatic dysfunction.
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Affiliation(s)
- Matthias Hoch
- Novartis Institutes for Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Masahiko Sato
- Novartis Institutes for Biomedical Research, Novartis Pharma K.K, Tokyo, Japan
| | - Julia Zack
- Novartis Pharmaceuticals, East Hanover, New Jersey, USA
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G. Lindström HJ, Friedman R. The effects of combination treatments on drug resistance in chronic myeloid leukaemia: an evaluation of the tyrosine kinase inhibitors axitinib and asciminib. BMC Cancer 2020; 20:397. [PMID: 32380976 PMCID: PMC7204252 DOI: 10.1186/s12885-020-06782-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 03/23/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Chronic myeloid leukaemia is in principle a treatable malignancy but drug resistance is lowering survival. Recent drug discoveries have opened up new options for drug combinations, which is a concept used in other areas for preventing drug resistance. Two of these are (I) Axitinib, which inhibits the T315I mutation of BCR-ABL1, a main source of drug resistance, and (II) Asciminib, which has been developed as an allosteric BCR-ABL1 inhibitor, targeting an entirely different binding site, and as such does not compete for binding with other drugs. These drugs offer new treatment options. METHODS We measured the proliferation of KCL-22 cells exposed to imatinib-dasatinib, imatinib-asciminib and dasatinib-asciminib combinations and calculated combination index graphs for each case. Moreover, using the median-effect equation we calculated how much axitinib can reduce the growth advantage of T315I mutant clones in combination with available drugs. In addition, we calculated how much the total drug burden could be reduced by combinations using asciminib and other drugs, and evaluated which mutations such combinations might be sensitive to. RESULTS Asciminib had synergistic interactions with imatinib or dasatinib in KCL-22 cells at high degrees of inhibition. Interestingly, some antagonism between asciminib and the other drugs was present at lower degrees on inhibition. Simulations revealed that asciminib may allow for dose reductions, and its complementary resistance profile could reduce the risk of mutation based resistance. Axitinib, however, had only a minor effect on T315I growth advantage. CONCLUSIONS Given how asciminib combinations were synergistic in vitro, our modelling suggests that drug combinations involving asciminib should allow for lower total drug doses, and may result in a reduced spectrum of observed resistance mutations. On the other hand, a combination involving axitinib was not shown to be useful in countering drug resistance.
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MESH Headings
- Antineoplastic Combined Chemotherapy Protocols/pharmacology
- Axitinib/administration & dosage
- Cell Line, Tumor
- Computer Simulation
- Dasatinib/administration & dosage
- Drug Discovery/methods
- Drug Resistance, Neoplasm/genetics
- Drug Synergism
- Humans
- Imatinib Mesylate/administration & dosage
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Mutation
- Niacinamide/administration & dosage
- Niacinamide/analogs & derivatives
- Pyrazoles/administration & dosage
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Affiliation(s)
| | - Ran Friedman
- Department of Chemistry and Biomedical Sciences, Linnæus University, Kalmar, 391 82 Sweden
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