Cited by 82Protein Degradation and InhibitorsAcute Lymphoblastic Leukemia researchCAR-T cell therapy research

BRD4 PROTAC degrader ARV-825 inhibits T-cell acute lymphoblastic leukemia by targeting 'Undruggable' Myc-pathway genes

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Wu, Shuiyan, Jiang, You, Hong, Yi, Chu, Xinran, Zhang, Zimu, Tao, Yanfang, Fan, Ziwei, Bai, Zhenjiang +12 more·2021·Cancer Cell International

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Abstract

Background: T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive disease with a high risk of induction failure and poor outcomes, with relapse due to drug resistance. Recent studies show that bromodomains and extra-terminal (BET) protein inhibitors are promising anti-cancer agents. ARV-825, comprising a BET inhibitor conjugated with cereblon ligand, was recently developed to attenuate the growth of multiple tumors in vitro and in vivo. However, the functional and molecular mechanisms of ARV-825 in T-ALL remain unclear. This study aimed to investigate the therapeutic efficacy and potential mechanism of ARV-825 in T-ALL. Methods: Expression of the BRD4 were determined in pediatric T-ALL samples and differential gene expression after ARV-825 treatment was explored by RNA-seq and quantitative reverse transcription-polymerase chain reaction. T-ALL cell viability was measured by CCK8 assay after ARV-825 administration. Cell cycle was analyzed by propidium iodide (PI) staining and apoptosis was assessed by Annexin V/PI staining. BRD4, BRD3 and BRD2 proteins were detected by western blot in cells treated with ARV-825. The effect of ARV-825 on T-ALL cells was analyzed in vivo. The functional and molecular pathways involved in ARV-825 treatment of T-ALL were verified by western blot and chromatin immunoprecipitation (ChIP). Results: BRD4 expression was higher in pediatric T-ALL samples compared with T-cells from healthy donors. High BRD4 expression indicated a poor outcome. ARV-825 suppressed cell proliferation in vitro by arresting the cell cycle and inducing apoptosis, with elevated poly-ADP ribose polymerase and cleaved caspase 3. BRD4, BRD3, and BRD2 were degraded in line with reduced cereblon expression in T-ALL cells. ARV-825 had a lower IC50 in T-ALL cells compared with JQ1, dBET1 and OTX015. ARV-825 perturbed the H3K27Ac-Myc pathway and reduced c-Myc protein levels in T-ALL cells according to RNA-seq and ChIP. In the T-ALL xenograft model, ARV-825 significantly reduced tumor growth and led to the dysregulation of Ki67 and cleaved caspase 3. Moreover, ARV-825 inhibited cell proliferation by depleting BET and c-Myc proteins in vitro and in vivo. Conclusions: BRD4 indicates a poor prognosis in T-ALL. The BRD4 degrader ARV-825 can effectively suppress the proliferation and promote apoptosis of T-ALL cells via BET protein depletion and c-Myc inhibition, thus providing a new strategy for the treatment of T-ALL.

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Crossref · 10.1186/s12935-021-01908-w

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  • ARV-825 (218) effectively degrades BRD4 protein while inhibiting proliferation and inducing apoptosis in cellular in vitro experiments, and in primary drug-resistant T-ALL cells it eradicates cells through BRD4 degradation, reducing c-Myc expression.

    “In 2021, Hu’s team revealed, through cellular in vitro experiments, that ARV-825 (218) effectively degraded the BRD4 protein while inhibiting proliferation and inducing apoptosis (Table 4). In primary drug-resistant T-cell acute lymphoblastic leukemia (T-ALL) cells, the researchers observed that ARV-825 eradicated cells through BRD4 protein degradation, significantly reducing c-Myc expression.518”

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Authors
Wu, S., Jiang, Y., Hong, Y., Chu, X., Zhang, Z., Tao, Y., Fan, Z., Bai, Z., Li, X., Chen, Y., Li, Z., Ding, X., Lv, H., Du, X., Lim, S. L., Zhang, Y., Huang, S., Lu, J., Pan, J., & Hu, S.
Affiliations
  • Soochow University (CN)
  • Nanjing University of Chinese Medicine (CN)
  • Cincinnati Children's Hospital Medical Center (US)
  • Saint Michael's Medical Center (US)
Corresponding author
  • Pan, Jian
  • Hu, Shaoyan
Venue
Cancer Cell International
Published
2021-04-22
Volume
21
Issue
1
Pages
230-230
ISSN
1475-2867 (ISSN-L)
OpenAlex
W3113804806
Cited by
81
References
37
Citations by year
2026: 18 · 2025: 13 · 2024: 11 · 2023: 23 · 2022: 12 · 2021: 4
FWCI
4.00
Type
journal article
Language
en
Open access
Locations
  • Cancer Cell International (publishedVersion, cc-by)
  • Research Square (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Natural Science Foundation of China (82072767)
  • Innovative Research Group Project of the National Natural Science Foundation of China (81770145)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Acute Lymphoblastic Leukemia research
  • Health Sciences › Medicine › Oncology › CAR-T cell therapy research
Keywords
ARV-825, BRD4, T-cell acute lymphoblastic leukemia, PROTAC degraders, cereblon ligands, BET inhibitors, MYC pathway, H3K27 acetylation, c-Myc, BRD3, BRD2, apoptosis, cell cycle arrest, pediatric leukemia, xenograft tumor growth

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