Cited by 813Chronic Lymphocytic Leukemia ResearchT-cell and B-cell ImmunologyProtein Degradation and Inhibitors

Ibrutinib is an irreversible molecular inhibitor of ITK driving a Th1-selective pressure in T lymphocytes

Open access
Dubovsky, Jason A., Beckwith, Kyle A., Natarajan, Gayathri, Woyach, Jennifer A., Jaglowski, Samantha, Zhong, Yiming, Hessler, Joshua D., Liu, Ta-Ming +21 more·2013·Blood

Abstract

Given its critical role in T-cell signaling, interleukin-2-inducible kinase (ITK) is an appealing therapeutic target that can contribute to the pathogenesis of certain infectious, autoimmune, and neoplastic diseases. Ablation of ITK subverts Th2 immunity, thereby potentiating Th1-based immune responses. While small-molecule ITK inhibitors have been identified, none have demonstrated clinical utility. Ibrutinib is a confirmed irreversible inhibitor of Bruton tyrosine kinase (BTK) with outstanding clinical activity and tolerability in B-cell malignancies. Significant homology between BTK and ITK alongside in silico docking studies support ibrutinib as an immunomodulatory inhibitor of both ITK and BTK. Our comprehensive molecular and phenotypic analysis confirms ITK as an irreversible T-cell target of ibrutinib. Using ibrutinib clinical trial samples along with well-characterized neoplastic (chronic lymphocytic leukemia), parasitic infection (Leishmania major), and infectious disease (Listeria monocytogenes) models, we establish ibrutinib as a clinically relevant and physiologically potent ITK inhibitor with broad therapeutic utility. This trial was registered at www.clinicaltrials.gov as #NCT01105247 and #NCT01217749.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1182/blood-2013-06-507947

Cites

48 of 48 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Ibrutinib inhibits other similar kinases that contain C481, including ITK and BLK.

    “Although ibrutinib inhibits other similar kinases that contain C481, including ITK and BLK,7,22”

    From Resistance Mechanisms for the Bruton's Tyrosine Kinase Inhibitor Ibrutinib (2014) · cites this paper as [22]

    The Results confirm that ibrutinib binds and inhibits ITK, but identify its covalent binding residue as C442, not C481. The passages searched for BLK do not report BLK inhibition, so the source does not support that part of the claim. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • At relapse, none of the six patients had mutations in other kinases containing a cysteine residue homologous to C481 in BTK that are irreversibly inhibited by ibrutinib.

    “At relapse, none of the patients had mutations in other kinases containing a cysteine residue homologous to C481 in BTK that are irreversibly inhibited by ibrutinib”

    From Resistance Mechanisms for the Bruton's Tyrosine Kinase Inhibitor Ibrutinib (2014) · cites this paper as [22]

    The Introduction and Results describe cysteine-dependent irreversible inhibition of BTK and ITK, but do not report mutation testing at relapse. A search for relapsed patients, six patients, and mutations in other kinases found no passage addressing the claim. (LLM, conf=0.75)

    Experimental — accuracy not yet measured
  • Mutations have not been observed in other kinases containing C481, including ITK and BLK, in patients with acquired resistance.

    “mutations have not been observed in these other targets, findings that suggest that BTK is its critical target.”

    From Resistance Mechanisms for the Bruton's Tyrosine Kinase Inhibitor Ibrutinib (2014) · cites this paper as [22]

    The Results describe ITK-C442A engineered in Jurkat cells to test ibrutinib binding, not mutations observed in patients with acquired resistance. Searches for acquired-resistance mutations in ITK, BLK, and other targets found no passage addressing whether such mutations were observed; our copy therefore cannot verify the attributed claim. (LLM, conf=0.73)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 49 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Dubovsky, J. A., Beckwith, K. A., Natarajan, G., Woyach, J. A., Jaglowski, S., Zhong, Y., Hessler, J. D., Liu, T.-M., Chang, B. Y., Larkin, K. M., Stefanovski, M. R., Chappell, D. L., Frissora, F. W., Smith, L. L., Smucker, K. A., Flynn, J. M., Jones, J. A., Andritsos, L. A., Maddocks, K., Lehman, A. M., Furman, R., Sharman, J., Mishra, A., Caligiuri, M. A., Satoskar, A. R., Buggy, J. J., Muthusamy, N., Johnson, A. J., & Byrd, J. C.
Affiliations
  • Department of Internal Medicine, Division of Hematology,
  • The Ohio State University (US)
  • Pharmacyclics (United States) (US)
  • Weill Cornell Medicine (US)
  • Willamette Valley Cancer Institute and Research Center (US)
  • Department of Pathology, and
Venue
Blood
Published
2013-10-10
Volume
122
Issue
15
Pages
2539-2549
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2089103836
Cited by
810
References
49
Citations by year
2026: 30 · 2025: 43 · 2024: 55 · 2023: 51 · 2022: 70 · 2021: 98 · 2020: 68 · 2019: 71 · 2018: 71 · 2017: 70 · 2016: 65 · 2015: 67 · 2014: 43 · 2013: 5 · 2012: 1
FWCI
29.54
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (4p01ca081534-16)
  • National Cancer Institute (P01CA095426, P50CA140158, T32CA009338, 5 T32 CA009338-33-03, P30CA016058, K12CA133250, P01-CA-081534)
Topics
  • Health Sciences › Medicine › Genetics › Chronic Lymphocytic Leukemia Research
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
Keywords
ibrutinib, irreversible kinase inhibitors, Bruton's tyrosine kinase, T cell signaling, Th1 response, Th2 immune response, chronic lymphocytic leukemia, Leishmania major, Listeria monocytogenes, immunomodulation
MeSH terms
Adenine, Animals, Disease Models, Animal, Enzyme Inhibitors, Humans, Leukemia, Listeriosis, Lymphocyte Activation, Piperidines, Protein-Tyrosine Kinases, Pyrazoles, Pyrimidines, Leishmaniasis, Cutaneous, CD8-Positive T-Lymphocytes, Th1 Cells, Th2 Cells, Jurkat Cells, Mice, Primary Cell Culture

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review