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Lung Cancer (Amsterdam, Netherlands) Aug 2022Tyrosine kinase inhibitors (TKIs) are the standard of care for patients with non-small cell lung cancer (NSCLC) that harbor mutations of the epidermal growth factor... (Review)
Review
Tyrosine kinase inhibitors (TKIs) are the standard of care for patients with non-small cell lung cancer (NSCLC) that harbor mutations of the epidermal growth factor receptor (EGFR) gene. First-line therapy for these patients is often osimertinib, a third-generation EGFR TKI. Erlotinib, gefitinib, afatinib, and dacomitinib are first- and second-generation TKIs that are also available. However, almost all patients eventually develop disease progression due to TKI-acquired resistance. The mechanisms of resistance after TKI exposure often involve EGFR or its downstream pathways. While a frequently utilized strategy for combating acquired resistance to EGFR TKIs remains standard platinum-based chemotherapy, clinical investigation of promising novel agents targeting common resistance mechanisms such as MET, HER2, and HER3 is of increased interest. In this review, we discuss the mechanisms of resistance to TKIs in EGFR-mutant NSCLC, examine current treatment standards, and discuss novel developing therapies. Both EGFR-dependent (involving secondary mutations in EGFR) and EGFR-independent (mutations that bypass EGFR signaling and histologic transformation) resistance mechanisms are considered. Several novel treatment strategies are emerging to overcome these resistance mechanisms, as the understanding and identification of specific EGFR-TKI resistance mechanisms continues to improve. The treatments in development aim to target or bypass the mechanisms of resistance, including MET-, HER2-, and HER3-directed therapies. In patients with acquired TKI resistance, molecular profiling at the time of initial progression may help identify relevant mechanisms of resistance. Clinical trial participation is vital to continued investigation for EGFR-mutant NSCLC.
Topics: Carcinoma, Non-Small-Cell Lung; Drug Resistance, Neoplasm; ErbB Receptors; Humans; Lung Neoplasms; Mutation; Protein Kinase Inhibitors
PubMed: 35714425
DOI: 10.1016/j.lungcan.2022.05.011 -
Journal of Thoracic Oncology : Official... May 2021The first-line treatment of choice for patients with EGFR mutation-positive NSCLC is an EGFR tyrosine kinase inhibitor (TKI), of which five as follows are predominantly... (Review)
Review
The first-line treatment of choice for patients with EGFR mutation-positive NSCLC is an EGFR tyrosine kinase inhibitor (TKI), of which five as follows are predominantly available in practice: gefitinib, erlotinib, afatinib, dacomitinib, and osimertinib. Most prospective clinical trial data with these agents are limited to patients with the common activating and sensitizing EGFR mutations as follows: exon 19 deletions and exon 21 L858R point mutations. However, 10% to 20% of patients with NSCLC harbor uncommon EGFR mutations that have variable sensitivity to different EGFR TKIs. Owing to their molecular structures, afatinib, dacomitinib, and osimertinib have broader inhibitory profiles than the first-generation agents, gefitinib and erlotinib. Nevertheless, the paucity of prospective clinical data, the wide heterogeneity of uncommon mutations, and the existence of compound mutations in up to 25% of the cases complicate treatment decisions in this patient subgroup. Here, we collate the latest preclinical and clinical data regarding the activity of different TKIs against major uncommon EGFR mutations including compound mutations, but excluding exon 20 insertions which are generally insensitive to TKIs. On the basis of these data, we offer suggestions regarding treatment strategies for uncommon EGFR mutations. Moving forward, it will be important to include uncommon EGFR mutations in the first-line molecular analysis of all patients with adenocarcinoma of the lung, as this will help optimize patient outcomes according to their precise genotype.
Topics: ErbB Receptors; Exons; Humans; Lung Neoplasms; Mutation; Prospective Studies; Protein Kinase Inhibitors
PubMed: 33333327
DOI: 10.1016/j.jtho.2020.12.002 -
BMJ (Clinical Research Ed.) Oct 2019To compare the efficacy and safety of first line treatments for patients with advanced epidermal growth factor receptor (EGFR) mutated non-small cell lung cancer (NSCLC). (Meta-Analysis)
Meta-Analysis
Efficacy and safety of first line treatments for patients with advanced epidermal growth factor receptor mutated, non-small cell lung cancer: systematic review and network meta-analysis.
OBJECTIVE
To compare the efficacy and safety of first line treatments for patients with advanced epidermal growth factor receptor (EGFR) mutated non-small cell lung cancer (NSCLC).
DESIGN
Systematic review and network meta-analysis.
DATA SOURCES
PubMed, Embase, Cochrane Central Register of Controlled Trials, ClinicalTrials.gov, and several international conference databases, from inception to 20 May 2019.
ELIGIBILITY CRITERIA FOR SELECTING STUDIES
Published and unpublished randomised controlled trials comparing two or more treatments in the first line setting for patients with advanced EGFR mutated NSCLC were included in a bayesian network meta-analysis. Eligible studies reported at least one of the following clinical outcome measures: progression free survival, overall survival, objective response rate, and adverse events of grade 3 or higher.
RESULTS
18 eligible trials involved 4628 patients and 12 treatments: EGFR tyrosine kinase inhibitors (TKIs; osimertinib, dacomitinib, afatinib, erlotinib, gefitinib, and icotinib), pemetrexed based chemotherapy, pemetrexed free chemotherapy, and combination treatments (afatinib plus cetuximab, erlotinib plus bevacizumab, gefitinib plus pemetrexed based chemotherapy, and gefitinib plus pemetrexed). Consistent with gefitinib plus pemetrexed based chemotherapy (hazard ratio 0.95, 95% credible interval 0.72 to 1.24), osimertinib showed the most favourable progression free survival, with significant differences versus dacomitinib (0.74, 0.55 to 1.00), afatinib (0.52, 0.40 to 0.68), erlotinib (0.48, 0.40 to 0.57), gefitinib (0.44, 0.37 to 0.52), icotinib (0.39, 0.24 to 0.62), pemetrexed based chemotherapy (0.24, 0.17 to 0.33), pemetrexed free chemotherapy (0.16, 0.13 to 0.20), afatinib plus cetuximab (0.44, 0.28 to 0.71), and gefitinib plus pemetrexed (0.65, 0.46 to 0.92). Osimertinib and gefitinib plus pemetrexed based chemotherapy were also consistent (0.94, 0.66 to 1.35) in providing the best overall survival benefit. Combination treatments caused more toxicity in general, especially erlotinib plus bevacizumab, which caused the most adverse events of grade 3 or higher. Different toxicity spectrums were revealed for individual EGFR-TKIs. Subgroup analyses by the two most common EGFR mutation types indicated that osimertinib was associated with the best progression free survival in patients with the exon 19 deletion, and gefitinib plus pemetrexed based chemotherapy was associated with the best progression free survival in patients with the Leu858Arg mutation.
CONCLUSIONS
These results indicate that osimertinib and gefitinib plus pemetrexed based chemotherapy were associated with the best progression free survival and overall survival benefits for patients with advanced EGFR mutated NSCLC, compared with other first line treatments. The treatments resulting in the best progression free survival for patients with the exon 19 deletion and Leu858Arg mutations were osimertinib and gefitinib plus pemetrexed based chemotherapy, respectively.
SYSTEMATIC REVIEW REGISTRATION
PROSPERO CRD42018111954.
Topics: Biomarkers, Tumor; Carcinoma, Non-Small-Cell Lung; ErbB Receptors; Humans; Mutation; Network Meta-Analysis
PubMed: 31591158
DOI: 10.1136/bmj.l5460 -
Drugs Feb 2021ARCHER 1050, an ongoing, randomized, open-label, phase III trial of dacomitinib versus gefitinib in newly diagnosed patients with advanced non-small-cell lung cancer... (Comparative Study)
Comparative Study Randomized Controlled Trial
Updated Overall Survival in a Randomized Study Comparing Dacomitinib with Gefitinib as First-Line Treatment in Patients with Advanced Non-Small-Cell Lung Cancer and EGFR-Activating Mutations.
BACKGROUND
ARCHER 1050, an ongoing, randomized, open-label, phase III trial of dacomitinib versus gefitinib in newly diagnosed patients with advanced non-small-cell lung cancer (NSCLC) and an EGFR-activating mutation, reported significant improvement in overall survival (OS) with dacomitinib.
OBJECTIVE
This paper reports an updated OS analysis of ARCHER 1050 after an extended follow-up.
PATIENTS AND METHODS
In this multinational, multicenter trial, adults (aged ≥ 18 years or ≥ 20 years in Japan and Korea) with newly diagnosed NSCLC and EGFR mutation (exon 19 deletion or exon 21 L858R substitution), and no history of central nervous system metastases, were randomized 1:1 to receive dacomitinib 45 mg/day (n = 227) or gefitinib 250 mg/day (n = 225). Randomization was stratified by race and EGFR mutation type. An ad hoc updated analysis of OS was conducted at the protocol-defined cut-off of 48 months from first dosing of the last enrolled patient (13 May 2019).
RESULTS
After a median follow-up of 47.9 months, 133 (58.6%) patients had died in the dacomitinib arm and 152 (67.6%) in the gefitinib arm. The hazard ratio (HR) for OS was 0.748 (95% CI 0.591-0.947; two-sided P = 0.0155); median OS was 34.1 months with dacomitinib versus 27.0 months with gefitinib. The HR for OS in patients with dose reduction(s) in the dacomitinib arm (n = 154) compared with all patients in the gefitinib arm was 0.554 (95% CI 0.420-0.730); median OS was 42.5 months for patients with dose reduction(s) in the dacomitinib arm. The most common adverse events were diarrhea (87.7%), paronychia (61.7%), dermatitis acneiform (49.3%), and stomatitis (43.6%) with dacomitinib, and diarrhea (55.8%) and alanine aminotransferase increased (40.2%) with gefitinib.
CONCLUSIONS
The OS benefit from first-line treatment with dacomitinib versus gefitinib was maintained after extended follow-up in patients with advanced NSCLC with EGFR-activating mutations. CLINICALTRIALS.GOV: NCT01774721 (registered 24 January 2013).
Topics: Aged; Antineoplastic Combined Chemotherapy Protocols; Carcinoma, Non-Small-Cell Lung; Dose-Response Relationship, Drug; ErbB Receptors; Female; Gefitinib; Humans; Lung Neoplasms; Male; Mutation; Protein Kinase Inhibitors; Quinazolinones; Survival Analysis
PubMed: 33331989
DOI: 10.1007/s40265-020-01441-6 -
Pharmaceuticals (Basel, Switzerland) Apr 2023In spite of the increasing number of biologics license applications, the development of covalent inhibitors is still a growing field within drug discovery. The... (Review)
Review
In spite of the increasing number of biologics license applications, the development of covalent inhibitors is still a growing field within drug discovery. The successful approval of some covalent protein kinase inhibitors, such as ibrutinib (BTK covalent inhibitor) and dacomitinib (EGFR covalent inhibitor), and the very recent discovery of covalent inhibitors for viral proteases, such as boceprevir, narlaprevir, and nirmatrelvir, represent a new milestone in covalent drug development. Generally, the formation of covalent bonds that target proteins can offer drugs diverse advantages in terms of target selectivity, drug resistance, and administration concentration. The most important factor for covalent inhibitors is the electrophile (warhead), which dictates selectivity, reactivity, and the type of protein binding (i.e., reversible or irreversible) and can be modified/optimized through rational designs. Furthermore, covalent inhibitors are becoming more and more common in proteolysis, targeting chimeras (PROTACs) for degrading proteins, including those that are currently considered to be 'undruggable'. The aim of this review is to highlight the current state of covalent inhibitor development, including a short historical overview and some examples of applications of PROTAC technologies and treatment of the SARS-CoV-2 virus.
PubMed: 37242447
DOI: 10.3390/ph16050663 -
Pharmaceutical Biology Dec 2021Dacomitinib and poziotinib, irreversible ErbB family blockers, are often used for treatment of non-small cell lung cancer (NSCLC) in the clinic.
CONTEXT
Dacomitinib and poziotinib, irreversible ErbB family blockers, are often used for treatment of non-small cell lung cancer (NSCLC) in the clinic.
OBJECTIVE
This study investigates the effect of dacomitinib on the pharmacokinetics of poziotinib in rats.
MATERIALS AND METHODS
Twelve Sprague-Dawley rats were randomly divided into two groups: the test group (20 mg/kg dacomitinib for 14 consecutive days) and the control group (equal amounts of vehicle). Each group was given an oral dose of 10 mg/kg poziotinib 30 min after administration of dacomitinib or vehicle at the end of the 14 day administration. The concentration of poziotinib in plasma was quantified by UPLC-MS/MS. Both effects of dacomitinib on poziotinib and the mechanism of the observed inhibition were studied in rat liver microsomes and human liver microsomes.
RESULTS
When orally administered, dacomitinib increased the AUC, and decreased CL of poziotinib ( < 0.05). The IC values of M1 in RLM, HLM and CYP3A4 were 11.36, 30.49 and 19.57 µM, respectively. The IC values of M2 in RLM, HLM and CYP2D6 were 43.69, 0.34 and 0.11 µM, respectively, and dacomitinib inhibited poziotinib by a mixed way in CYP3A4 and CYP2D6. The results of the experiments were consistent with those of the experiments.
CONCLUSIONS
This research demonstrates that a drug-drug interaction between poziotinib and dacomitinib possibly exists when readministered with poziotinib; thus, clinicians should pay attention to the resulting changes in pharmacokinetic parameters and accordingly, adjust the dose of poziotinib in clinical settings.
Topics: Administration, Oral; Animals; Antineoplastic Agents; Area Under Curve; Chromatography, High Pressure Liquid; Drug Interactions; Humans; Inhibitory Concentration 50; Microsomes, Liver; Quinazolines; Quinazolinones; Rats; Rats, Sprague-Dawley; Tandem Mass Spectrometry
PubMed: 33899675
DOI: 10.1080/13880209.2021.1914114 -
Clinical and Translational Radiation... Jan 2021There has been little success targeting individual genes in combination with radiation in head and neck cancer. In this study we investigated whether targeting two key...
BACKGROUND AND PURPOSE
There has been little success targeting individual genes in combination with radiation in head and neck cancer. In this study we investigated whether targeting two key pathways simultaneously might be more effective.
MATERIALS AND METHODS
We studied the effect of combining dacomitinib (pan-HER, irreversible inhibitor) and gedatolisib (dual PI3K/MTOR inhibitor) with radiation in well characterized, low passage xenograft models of HNSCC in vitro and .
RESULTS
Dacomitinib showed differential growth inhibition in vitro that correlated to EGFR expression whilst gedatolisib was effective in both cell lines. Neither agent radiosensitized the cell lines in vitro. In vivo studies demonstrated that dacomitinib was an effective agent alone and in combination with radiation whilst the addition of gedatolisib did not enhance the effect of these two modalities despite inhibiting phosphorylation of key genes in the PI3K/MTOR pathway.
CONCLUSIONS
Our results showed that combining two drugs with radiation provided no added benefit compared to the single most active drug. Dacomitinib deserves more investigation as a radiation sensitizing agent in HNSCC.
PubMed: 33251343
DOI: 10.1016/j.ctro.2020.11.003 -
Clinical Cancer Research : An Official... Apr 2023Primary and acquired resistance to osimertinib remain significant challenges for patients with EGFR-mutant lung cancers. Acquired EGFR alterations such as EGFR T790M or...
PURPOSE
Primary and acquired resistance to osimertinib remain significant challenges for patients with EGFR-mutant lung cancers. Acquired EGFR alterations such as EGFR T790M or C797S mediate resistance to EGFR tyrosine kinase inhibitors (TKI) and combination therapy with dual EGFR TKIs may prevent or reverse on-target resistance.
PATIENTS AND METHODS
We conducted two prospective, phase I/II trials assessing combination osimertinib and dacomitinib to address on-target resistance in the primary and acquired resistance settings. In the initial therapy study, patients received dacomitinib and osimertinib in combination as initial therapy. In the acquired resistance trial, dacomitinib with or without osimertinib was administered to patients with EGFR-mutant lung cancers with disease progression on osimertinib alone and evidence of an acquired EGFR second-site mutation.
RESULTS
Cutaneous toxicities occurred in 93% (any grade) of patients and diarrhea in 72% (any grade) with the combination. As initial therapy, the overall response to the combination was 73% [95% confidence interval (CI), 50%-88%]. No acquired secondary alterations in EGFR were observed in any patients at progression. In the acquired resistance setting, the overall response was 14% (95% CI, 1%-58%).
CONCLUSIONS
We observed no acquired secondary EGFR alterations with dual inhibition of EGFR as up-front treatment, but this regimen was associated with greater toxicity. The combination was not effective in reversing acquired resistance after development of a second-site acquired EGFR alteration. Our study highlights the need to develop better strategies to address on-target resistance in patients with EGFR-mutant lung cancers.
Topics: Humans; Lung Neoplasms; Carcinoma, Non-Small-Cell Lung; ErbB Receptors; Mutation; Prospective Studies; Protein Kinase Inhibitors; Drug Resistance, Neoplasm; Adenocarcinoma of Lung; Aniline Compounds
PubMed: 36729110
DOI: 10.1158/1078-0432.CCR-22-3484