Cited by 619Protein Degradation and InhibitorsUbiquitin and proteasome pathwaysT-cell and B-cell Immunology

Immunomodulatory agents lenalidomide and pomalidomide co‐stimulate T cells by inducing degradation of T cell repressors I karos and A iolos via modulation of the E 3 ubiquitin ligase complex CRL 4 CRBN

Open access
Gandhi, Anita K., Kang, Jian, Havens, Courtney G., Conklin, Thomas, Ning, Yuhong, Wu, Lei, Ito, Takumi, Ando, Hideki +7 more·2014·British Journal of Haematology

Abstract

Summary: Cereblon ( CRBN ), the molecular target of lenalidomide and pomalidomide, is a substrate receptor of the cullin ring E 3 ubiquitin ligase complex, CRL 4 CRBN . T cell co‐stimulation by lenalidomide or pomalidomide is cereblon dependent: however, the CRL 4 CRBN substrates responsible for T cell co‐stimulation have yet to be identified. Here we demonstrate that interaction of the transcription factors Ikaros ( IKZF 1, encoded by the IKZF 1 gene) and A iolos ( IKZF 3, encoded by the IKZF 3 gene) with CRL 4 CRBN is induced by lenalidomide or pomalidomide. Each agent promotes A iolos and I karos binding to CRL 4 CRBN with enhanced ubiquitination leading to cereblon‐dependent proteosomal degradation in T lymphocytes. We confirm that A iolos and I karos are transcriptional repressors of interleukin‐2 expression. The findings link lenalidomide‐ or pomalidomide‐induced degradation of these transcriptional suppressors to well documented T cell activation. Importantly, Aiolos could serve as a proximal pharmacodynamic marker for lenalidomide and pomalidomide, as healthy human subjects administered lenalidomide demonstrated A iolos degradation in their peripheral T cells. In conclusion, we present a molecular model in which drug binding to cereblon results in the interaction of I karos and A iolos to CRL 4 CRBN , leading to their ubiquitination, subsequent proteasomal degradation and T cell activation.

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 · 10.1111/bjh.12708

Cites

31 of 31 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?

  • In 2014, landmark studies revealed that thalidomide and lenalidomide did not behave as inhibitors but functioned as molecular glue degraders analogous to auxin degrader TIR1.

    “the second breakthrough came in 2014 when a series of landmark studies revealed that thalidomide, and its more potent derivative lenalidomide, did not behave as inhibitors but in fact functioned as molecular glue degraders analogous to the auxin degrader tiR1 (chamberlain et al. 2014;Fischer et al. 2014;gandhi et al. 2014;Krönke et al. 2014;lu et al. 2014).”

    From From serendipity to strategy: molecular glue degraders in cancer therapeutics (2025) · cites this paper as Gandhi et al. 2014

    The Discussion (page unavailable) reports that lenalidomide promotes CRL4CRBN-mediated recruitment and degradation of Ikaros and Aiolos, rather than simply inhibiting the ligase. The paper studies lenalidomide and pomalidomide, not thalidomide as a degrader, and the cited passages do not establish an analogy to auxin–TIR1. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Following iMiD treatment and selective degradation of IKZF1, T cells increase production of IFN-γ, IL-21, and IL-2, enhancing the anti-tumor capability of the immune system.

    “Following iMiD treatment and the selective degradation of iKZF1, t cells increase their production of iFN-γ, il-21, and il-2 enhancing the anti-tumor capability of the immune system to target the cancerous plasma cells (gandhi et al. 2014;D'Souza et al. 2021;Bird and Pawlyn 2023) (Figure 5A, iii).”

    From From serendipity to strategy: molecular glue degraders in cancer therapeutics (2025) · cites this paper as gandhi et al. 2014

    The Results section on Ikaros knockdown reports increased IL-2 production in T cells, and the Discussion identifies IFN-γ among cytokines negatively regulated by Ikaros. But the paper describes drug-induced degradation of both IKZF1 (Ikaros) and IKZF3 (Aiolos), not IKZF1 alone. Our copy does not report increased IL-21 or show that these cytokine changes enhance targeting of cancerous plasma cells. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Lenalidomide promotes the interaction between CRBN and IKZF1 and IKZF3.

    “lenalidomide was shown to promote the interaction between cRBN and two members of the ikaros transcription factor family: iKZF1 and iKZF3 (gandhi et al. 2014;Krönke et al. 2014;lu et al. 2014).”

    From From serendipity to strategy: molecular glue degraders in cancer therapeutics (2025) · cites this paper as Gandhi et al. 2014

  • MG degraders can induce the degradation of target proteins otherwise deemed unligandable, such as IKZF1/3 and RBM39.

    “(ii) can induce the degradation of target proteins otherwise deemed unligandable (e.g., IKZF1/3, RBM39); [44][45][46][47][48][49][50][51][52][53][54][55]”

    From Chasing molecular glue degraders: screening approaches (2022) · cites this paper as [46]

  • IMiDs trigger CRBN-dependent proteasomal degradation of the transcription factors IKZF1 and IKZF3.

    “In brief, IMiDs were first shown to trigger CRBN-dependent proteasomal degradation of the C2H2-type zing-finger transcription factors Ikaros (IKZF1) and Aiolos (IKZF3).[46][47][48]”

    From Chasing molecular glue degraders: screening approaches (2022) · cites this paper as [46]

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

Cited by

Sorted by citations

Authors
Gandhi, A. K., Kang, J., Havens, C. G., Conklin, T., Ning, Y., Wu, L., Ito, T., Ando, H., Waldman, M. F., Thakurta, A., Klippel, A., Handa, H., Daniel, T. O., Schafer, P. H., & Chopra, R.
Affiliations
  • Celgene (United States) (US)
  • Celgene Corporation San Diego CA USA
  • Tokyo Medical University (JP)
Corresponding author
Gandhi, Anita K.
Venue
British Journal of Haematology
Publisher
Wiley
Published
2013-12-13
Volume
164
Issue
6
Pages
811-821
ISSN
  • 0007-1048 (ISSN-L)
  • 1365-2141
OpenAlex
W1973999018
Cited by
619
References
31
Citations by year
2026: 24 · 2025: 57 · 2024: 52 · 2023: 53 · 2022: 60 · 2021: 76 · 2020: 72 · 2019: 44 · 2018: 42 · 2017: 36 · 2016: 47 · 2015: 30 · 2014: 26
FWCI
15.39
Type
journal article
Language
en
Open access
Locations
  • British Journal of Haematology (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
Celgene corporation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
lenalidomide, pomalidomide, cereblon, Ikaros, Aiolos, IKZF1, IKZF3, T cell costimulation, ubiquitination, proteasomal degradation, immunomodulators, pharmacodynamic biomarkers, T cells
MeSH terms
Lenalidomide, Humans, Immunologic Factors, Peptide Hydrolases, T-Lymphocytes, Thalidomide, Transcription Factors, Transfection, Angiogenesis Inhibitors, Ubiquitin-Protein Ligases, Proteasome Endopeptidase Complex, Adaptor Proteins, Signal Transducing, Ikaros Transcription Factor, Ubiquitination

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