Cited by 1,028Sarcoma Diagnosis and TreatmentLung Cancer Treatments and MutationsCancer Genomics and Diagnostics

The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.

Larotrectinib in patients with TRK fusion-positive solid tumours: a pooled analysis of three phase 1/2 clinical trials

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Abstract

Background The selective TRK inhibitor larotrectinib was approved for paediatric and adult patients with advanced TRK fusion-positive solid tumours based on a primary analysis set of 55 patients. The aim of our analysis was to explore the efficacy and long-term safety of larotrectinib in a larger population of patients with TRK fusion-positive solid tumours.Methods Patients were enrolled and treated in a phase 1 adult, a phase 1/2 paediatric, or a phase 2 adolescent and adult trial. Some eligibility criteria differed between these studies. For this pooled analysis, eligible patients were aged 1 month or older, with a locally advanced or metastatic non-CNS primary, TRK fusion-positive solid tumour, who had received standard therapy previously if available. This analysis set includes the 55 patients on which approval of larotrectinib was based. Larotrectinib was administered orally (capsule or liquid formulation), on a continuous 28-day schedule, to adults mostly at a dose of 100 mg twice daily, and to paediatric patients mostly at a dose of 100 mg/m 2 (maximum of 100 mg) twice daily. The primary endpoint was objective response as assessed by local investigators in an intention-to-treat analysis. Contributing trials are registered with ClinicalTrials.gov, NCT02122913 (active not recruiting), NCT02637687 (recruiting), and NCT02576431 (recruiting).Findings Between May 1, 2014, and Feb 19, 2019, 159 patients with TRK fusion-positive cancer were enrolled and treated with larotrectinib. Ages ranged from less than 1 month to 84 years. The proportion of patients with an objective response according to investigator assessment was 121 (79%, 95% CI 72-85) of 153 evaluable patients, with 24 (16%) having complete responses. In a safety population of 260 patients treated regardless of TRK fusion status, the most common grade 3 or 4 larotrectinib-related adverse events were increased alanine aminotransferase (eight [3%] of 260 patients), anaemia (six, 2%), and decreased neutrophil count (five [2%]). The most common larotrectinib-related serious adverse events were increased alanine aminotransferase (two [<1%] of 260 patients), increased aspartate aminotransferase (two [<1%]), and nausea (two [<1%]). No treatment-related deaths occurred.Interpretation These data confirm that TRK fusions define a unique molecular subgroup of advanced solid tumours for which larotrectinib is highly active. Safety data indicate that long-term administration of larotrectinib is feasible.Funding Bayer and Loxo Oncology.

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  1. Geoerger, 2019, Larotrectinib efficacyand safety in pediatric patients with TRK fusion cancer, Pediatr Blood Cancer, 66, S4

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Authors
Hong, D. S., DuBois, S. G., Kummar, S., Farago, A. F., Albert, C. M., Rohrberg, K. S., van Tilburg, C. M., Nagasubramanian, R., Berlin, J. D., Federman, N., Mascarenhas, L., Geoerger, B., Dowlati, A., Pappo, A. S., Bielack, S., Doz, F., McDermott, R., Patel, J. D., Schilder, R. J., Tahara, M., Pfister, S. M., Witt, O., Ladanyi, M., Rudzinski, E. R., Nanda, S., Childs, B. H., Laetsch, T. W., Hyman, D. M., & Drilon, A.
Affiliations
  • The University of Texas MD Anderson Cancer Center (US)
  • Harvard University (US)
  • Stanford Medicine (US)
  • Massachusetts General Hospital (US)
  • Seattle Children's Hospital (US)
  • University of Copenhagen (DK)
  • Vanderbilt University Medical Center (US)
  • University of California, Los Angeles (US)
  • University of Southern California (US)
  • Université Paris-Saclay (FR)
  • University Hospitals Cleveland Medical Center (US)
  • St. Jude Children's Research Hospital (US)
  • Olgahospital (DE)
  • Université Paris Descartes (FR)
  • Cancer Trials Ireland (IE)
  • University of Chicago (US)
  • Thomas Jefferson University (US)
  • National Cancer Center Hospital East (JP)
  • German Cancer Research Center (DE)
  • Memorial Sloan Kettering Cancer Center (US)
  • Bayer (United States) (US)
  • The University of Texas Southwestern Medical Center (US)
Corresponding author
Drilon, Alexander
Venue
The Lancet Oncology
Publisher
Elsevier BV
Published
2020-04
Volume
21
Issue
4
Pages
531-540
ISSN
1470-2045 (ISSN-L)
OpenAlex
W3008107700
Cited by
1,028
References
25
Citations by year
2026: 106 · 2025: 148 · 2024: 162 · 2023: 178 · 2022: 202 · 2021: 171 · 2020: 60
FWCI
86.25
Type
journal article
Language
en
Open access
Locations
  • The Lancet Oncology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • Loxo Oncology
  • Bayer Corporation
  • Bayer Fund
Topics
  • Health Sciences › Medicine › Oncology › Sarcoma Diagnosis and Treatment
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
Keywords
larotrectinib, TRK inhibitors, objective response rate, long-term safety, adverse events, childhood cancer, adult cancer, metastatic cancer, pooled analysis of clinical trials, alanine aminotransferase elevation, neutropenia, anemia, complete response, dose-limiting toxicity
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Child, Child, Preschool, Female, Humans, Infant, Infant, Newborn, Male, Middle Aged, Neoplasms, Proteins, Pyrazoles, Pyrimidines, Vesicular Transport Proteins, Young Adult

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