Evidence map›Paper›PMID 33303536›Full record

ArticleThe European respiratory journal2021

Rescue of multiple class II CFTR mutations by elexacaftor+tezacaftor+ivacaftor mediated in part by the dual activities of elexacaftor as both corrector and potentiator.

Onofrio Laselva, Claire Bartlett, Tarini N A Gunawardena, Hong Ouyang, Paul D W Eckford, Theo J Moraes, Christine E Bear, Tanja Gonska

Open access · hybridAbstract read
In one paragraph

Article in The European respiratory journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 93 papers.

0numbers the graph read from it
0cells of the map it votes in
93citing papers in PubMed
12.5field-weighted citation impact, top 1% of its field
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

93 citing papers in PubMed, 162 citations in OpenAlex.

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  6. Chronic and acute modulator treatment restore wild-type-like activity and stability to the primary cystic fibrosis-causingProceedings of the National Academy of Sciences of the United States of America · 2026
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33 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 1 country.

Onofrio LaselvaProgramme in Molecular Medicine, The Hospital for Sick Children, Toronto, ON, Canada.ORCID 0000-0002-0237-4079
Claire BartlettProgramme in Translational Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
Tarini N A GunawardenaProgramme in Molecular Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
Hong OuyangProgramme in Translational Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
Paul D W EckfordProgramme in Molecular Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
Theo J MoraesProgramme in Translational Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
Christine E BearProgramme in Molecular Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
Tanja GonskaProgramme in Translational Medicine, The Hospital for Sick Children, Toronto, ON, Canada tanja.gonska@sickkids.ca.
Hospital for Sick Children · CAUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Positive results in pre-clinical studies of the triple combination of elexacaftor, tezacaftor and ivacaftor, performed in airway epithelial cell cultures obtained from patients harbouring the class II cystic fibrosis transmembrane conductance regulator (CFTR) mutation F508del-CFTR, translated to impressive clinical outcomes for subjects carrying this mutation in clinical trials and approval of Trikafta.Encouraged by this correlation, we were prompted to evaluate the effect of the elexacaftor, tezacaftor and ivacaftor triple combination on primary nasal epithelial cultures obtained from individuals with rare class II CF-causing mutations (G85E, M1101K and N1303K) for which Trikafta is not approved.Cultures from individuals homozygous for M1101K responded better than cultures harbouring G85E and N1303K after treatment with the triple combination with respect to improvement in regulated channel function and protein processing. A similar genotype-specific effect of the triple combination was observed when the different mutations were expressed in HEK293 cells, supporting the hypothesis that these modulators may act directly on the mutant proteins. Detailed studies in nasal cultures and HEK293 cells showed that the corrector, elexacaftor, exhibited dual activity as both corrector and potentiator, and suggested that the potentiator activity contributes to its pharmacological activity.These pre-clinical studies using nasal epithelial cultures identified mutation genotypes for which elexacaftor, tezacaftor and ivacaftor may produce clinical responses that are comparable to, or inferior to, those observed for F508del-CFTR.

Indexed as

Cystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorAminophenolsBenzodioxolesDrug CombinationsHEK293 CellsHumansIndolesMutationPyrazolesPyridinesPyrrolidinesQuinolinesQuinolonesAminophenolsBenzodioxolesCFTR protein, humanCystic Fibrosis Transmembrane Conductance RegulatorDrug Combinationselexacaftorelexacaftor, ivacaftor, tezacaftor drug combinationIndolesivacaftorPyrazolesPyridinesPyrrolidinesQuinolinesQuinolonestezacaftortezacaftor, ivacaftor drug combination

Identifiers

PMID33303536
PMCPMC8209484
OpenAlexW3112448433

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

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.