Cited by 188Protein Degradation and InhibitorsAcute Myeloid Leukemia ResearchProtein Tyrosine Phosphatases

Enhancing Antiproliferative Activity and Selectivity of a FLT-3 Inhibitor by Proteolysis Targeting Chimera Conversion

Burslem, George M., Song, Jayoung, Chen, Xin, Hines, John, Crews, Craig M.·2018·Journal of the American Chemical Society

Abstract

The receptor tyrosine kinase FLT-3 is frequently mutated in acute myeloid leukemia; however, current small molecule inhibitors suffer from limited efficacy in the clinic. Conversion of a FLT-3 inhibitor (quizartinib) into a proteolysis targeting chimera (PROTAC) results in a compound that induces degradation of FLT-3 ITD mutant at low nanomolar concentrations. Furthermore, the PROTAC is capable of inhibiting cell growth more potently than the warhead alone while inhibiting fewer off-target kinases. This enhanced antiproliferative activity occurs, despite a slight reduction in the PROTAC's kinase inhibitory activity, via an increased level of apoptosis induction suggesting nonkinase roles for the FLT-3 ITD protein. Additionally, the PROTAC is capable of inducing FLT-3 ITD degradation in vivo. These results suggest that degradation of FLT-3 ITD may provide a useful method for therapeutic intervention.

Integrity signals

Registry

Crossref · 10.1021/jacs.8b10320

Cites

40 of 40 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

  • PROTAC selectivity does not necessarily mimic that of its target-binding warhead, but rather depends sensitively on the linker.

    “It has further been shown that PROTAC selectivity does not necessarily mimic that of its target-binding warhead, but rather depends sensitively on the linker 20, 23, 24, 33”
  • The in vitro anti-proliferative activity of the FLT-3 PROTAC varies among AML cells compared to the FLT-3 inhibitor used to develop the PROTAC; it is significantly better against MV4-11 and wild-type MOLM-14, but less potent in OCI-AML3, likely due to extent of kinase engagement/selectivity.

    “However, the in vitro anti-proliferative activity of the FLT-3 PROTAC varies among AML cells compared to the FLT-3 inhibitor that was used to develop the PROTAC. For example, the PROTAC exerted a significantly better activity against MV4-11 and wild-type MOLM-14 AML cells, but was less potent in OCI-AML3 cells, than the FLT-3 inhibitor, which is likely attributed to the extent of kinase engagement”
  • The FLT-3 PROTAC degrades FLT-3 in MV4-11 mouse xenografts.

    “They confirmed the ability of this FLT-3 PROTAC to degrade FLT-3 in MV4-11 mouse xenografts.”
  • Both the FLT-3 PROTAC and inhibitor were ineffective against K562 CML cells, suggesting that the antitumor effect of the FLT-3 PROTAC on different FLT-3 ITD mutated cells is cell-dependent.

    “In addition, both the FLT-3 PROTAC and inhibitor were ineffective against other types of hematologic malignancies, such as K562 CML cells, suggesting that the antitumor effect of the FLT-3 PROTAC on different FLT-3 ITD mutated cells is cell-dependent.”
  • A VHL-recruiting FLT-3 PROTAC potently induced FLT-3 ITD degradation in MV4-11 and MOLM-14 AML cell lines in vitro.

    “In contrast, a VHL-recruiting FLT-3 PROTAC from Crews’ lab potently induced FLT-3 ITD degradation in MV4-11 and MOLM-14 AML cell lines in vitro [10].”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Burslem, G. M., Song, J., Chen, X., Hines, J., & Crews, C. M.
Affiliations
  • Yale University (US)
  • Arvinas (United States) (US)
Corresponding author
Crews, Craig M.
Venue
Journal of the American Chemical Society
Published
2018-11-14
Volume
140
Issue
48
Pages
16428-16432
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2900888512
Cited by
176
References
40
Citations by year
2026: 10 · 2025: 25 · 2024: 20 · 2023: 20 · 2022: 22 · 2021: 28 · 2020: 31 · 2019: 19 · 2018: 1
FWCI
7.29
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Cancer Institute (R35CA197589, R50CA211252)
  • National Research Foundation of Korea (NRF-2016R1A6A3A03012989)
  • Leukemia and Lymphoma Society
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
FLT3, quizartinib, PROTACs, acute myeloid leukemia, kinase selectivity, protein degradation, apoptosis, off-target kinase inhibition, antiproliferative activity
MeSH terms
Animals, Antineoplastic Agents, Humans, Mice, Nude, Phenylurea Compounds, Xenograft Model Antitumor Assays, Ubiquitin-Protein Ligases, Cell Line, Tumor, Protein Kinase Inhibitors, Cell Proliferation, fms-Like Tyrosine Kinase 3, Benzothiazoles, Proteolysis

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