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Ref Type Journal Article
PMID (34911818)
Authors Jo H, Yagishita S, Hayashi Y, Ryu S, Suzuki M, Kohsaka S, Ueno T, Matsumoto Y, Horinouchi H, Ohe Y, Watanabe SI, Motoi N, Yatabe Y, Mano H, Takahashi K, Hamada A
Title Comparative Study on the Efficacy and Exposure of Molecular Target Agents in Non-small Cell Lung Cancer PDX Models with Driver Genetic Alterations.
Journal Molecular cancer therapeutics
Vol 21
Issue 2
Date 2022 Feb
URL
Abstract Text Patient-derived xenografts (PDX) can adequately reflect clinical drug efficacy. However, the methods for evaluating drug efficacy are not fully established. We selected five non-small cell lung cancer (NSCLC) PDXs with genetic alterations from established PDXs and the corresponding molecular targeted therapy was administered orally for 21 consecutive days. Genetic analysis, measurement of drug concentrations in blood and tumors using LC/MS-MS, and analysis of drug distribution in tumors using matrix-assisted laser desorption/ionization mass spectrometry were performed. Fifteen (20%) PDXs were established using samples collected from 76 patients with NSCLC with genetic alterations. The genetic alterations observed in original patients were largely maintained in PDXs. We compared the drug efficacy in original patients and PDX models; the efficacies against certain PDXs correlated with the clinical effects, while those against the others did not. We determined blood and intratumor concentrations in the PDX model, but both concentrations were low, and no evident correlation with the drug efficacy could be observed. The intratumoral spatial distribution of the drugs was both homogeneous and heterogeneous for each drug, and the distribution was independent of the expression of the target protein. The evaluation of drug efficacy in PDXs enabled partial reproduction of the therapeutic effect in original patients. A more detailed analysis of systemic and intratumoral pharmacokinetics may help clarify the mode of action of drugs. Further development of evaluation methods and indices to improve the prediction accuracy of clinical efficacy is warranted.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
EML4 - ALK lung adenocarcinoma sensitive Brigatinib Preclinical - Pdx Actionable In a preclinical study, Alunbrig (brigatinib) treatment decreased tumor growth in a patient-derived xenograft (PDX) model of lung adenocarcinoma harboring EML4-ALK (PMID: 34911818). 34911818
EML4 - ALK lung adenocarcinoma predicted - sensitive Alectinib Case Reports/Case Series Actionable In a clinical case study, Alecensa (alectinib) treatment resulted in a partial response lasting 17.5 months in a patient with lung adenocarcinoma harboring EML4-ALK (PMID: 34911818). 34911818
EML4 - ALK lung adenocarcinoma sensitive Lorlatinib Preclinical - Pdx Actionable In a preclinical study, Lorbrena (lorlatinib) treatment decreased tumor growth in a patient-derived xenograft (PDX) model of lung adenocarcinoma harboring EML4-ALK (PMID: 34911818). 34911818
EML4 - ALK lung adenocarcinoma predicted - sensitive Ceritinib Case Reports/Case Series Actionable In a clinical case study, Zykadia (ceritinib) treatment resulted in a partial response lasting 8.7 months in a patient with lung adenocarcinoma harboring EML4-ALK, who progressed on prior Alecensa (alectinib) treatment (PMID: 34911818). 34911818