ArticleJournal of chromatography. B, Analytical technologies in the biomedical and life sciences2022
Quantitation of cystic fibrosis triple combination therapy, elexacaftor/tezacaftor/ivacaftor, in human plasma and cellular lysate.
Article in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
16 citing papers in PubMed, 20 citations in OpenAlex.
- Evaluation of the drug interaction between rifabutin and elexacaftor/tezacaftor/ivacaftor (ETI).Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society · 2026Trial
- Physiologically Based Pharmacokinetic Modeling of Elexacaftor-Tezacaftor-Ivacaftor in Adults and Pediatric People with Cystic Fibrosis: Exploring Brain Exposure and Neuropsychiatric Adverse Events.Clinical pharmacokinetics · 2026Article
- Impact of CFTR modulator concentrations on clinical response in cystic fibrosis.The European respiratory journal · 2026Observational
- Pharmacokinetic assessment of elexacaftor/tezacaftor/ivacaftor and their metabolites in maternal blood, cord blood, the neonate, and breastmilk of a cystic fibrosis carrier mother/affected fetus dyad.Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society · 2026Article
- Molecular and pharmacological evaluation of rare, cystic fibrosis-causing missense mutations of the CFTR channel.The Journal of physiology · 2025Article
- VX-445 (elexacaftor) inhibits chloride secretion across human bronchial epithelial cells by directly blocking KCa3.1 channels.PNAS nexus · 2025Article
- Elexacaftor-tezacaftor-ivacaftor pharmacokinetics with concurrent tacrolimus administration after lung transplant.Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society · 2025Observational
- A Liquid Chromatography-Tandem Mass Spectrometry Method for the Quantification of Cystic Fibrosis Drugs (Caftors) in Plasma and Its Application for Therapeutic Monitoring.Molecules (Basel, Switzerland) · 2025Article
- Pilot and feasibility study of dietary composition with elexacaftor-tezacaftor-ivacaftor concentrations in people with cystic fibrosis.Pharmacotherapy · 2024Article
- Development and clinical implementation of an LC-HRMS method for ivacaftor, lumacaftor, tezacaftor and elexacaftor in human plasma and breast milk.Analytical and bioanalytical chemistry · 2024Article
- Therapeutic Drug Monitoring of Elexacaftor, Tezacaftor, and Ivacaftor in Adult People with Cystic Fibrosis.Journal of personalized medicine · 2024Article
- Pharmacokinetic variability of CFTR modulators from standard and alternative regimens.Pulmonary pharmacology & therapeutics · 2024Article
- Differential distribution of ivacaftor and its metabolites in plasma and human airway epithelia.Pulmonary pharmacology & therapeutics · 2024Article
- Potentiation of BKCa channels by cystic fibrosis transmembrane conductance regulator correctors VX-445 and VX-121.The Journal of clinical investigation · 2024Article
- Simultaneous Quantification of Ivacaftor, Tezacaftor, and Elexacaftor in Cystic Fibrosis Patients' Plasma by a Novel LC-MS/MS Method.Biomedicines · 2023Article
- Post-approval studies with the CFTR modulators Elexacaftor-Tezacaftor-Ivacaftor.Frontiers in pharmacology · 2023Review
Corrections and comments
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
Abstract
The triple combination modulator therapy (ETI, elexacaftor (ELX), tezacaftor (TEZ), and ivacaftor (IVA)) is a recent advancement for the care of patients with cystic fibrosis. To aid in the development of clinical pharmacokinetics studies of this treatment, we developed a liquid chromatography tandem mass spectrometry (LC-MS/MS) assay for quantifying the component compounds in human plasma and cell lysate. This assay was optimized for small volumes (10 µL), uses stably labeled isotopes of the ETI compounds as internal standards, and employs a simple methanol protein precipitation method. Chromatography was performed on an ACE Excel C18, 2.1 × 50 mm, reversed phase analytical column, using a step or bump isocratic method, with mobile phases consisting of 0.1% formic acid in water for A, and 0.1% formic acid in acetonitrile for B. Analyte and internal standard detection was conducted with ESI positive ionization tandem mass spectrometry. The precursor/product transitions (m/z) monitored were 598.0/422.0 for ELX, 521.0/449.0 for TEZ, 393.0/172.0 for IVA, 601.0/422.0 for IS-ELX, 525.0/453.0 for IS-TEZ, and 399.0/178.0 for IS-IVA, respectively. The assay has a dynamic range of 10 to 10,000 ng/mL, with a mean coefficient of determination (r
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.