BRD4 Degrader

ARV-825 is a BET protein PROTAC degrader that recruits cereblon, and it targets BRD2, BRD3, and BRD4 for degradation via the ubiquitin-proteasome pathway. ARV-825 downregulates c-MYC, PLK1, MYCN, CDK4/6, JAK2, pSTAT3/5, PIM1, and Bcl-xL, upregulates p21 and p27, and modulates H3K27Ac-mediated transcription, the G2/M checkpoint, the Wnt/β-catenin pathway, and amino acid transport pathways. ARV-825 induces G1 phase cell cycle arrest, caspase 3/PARP-mediated apoptosis, DNA damage, and reactive oxygen species (ROS) production, reduces mitochondrial respiration, and simultaneously inhibits cell proliferation, clonogenic growth, and cell migration. ARV-825 is used in research on gastric cancer, leukemia, neuroblastoma, and cholangiocarcinoma.

ARV-771 is a BET PROTAC degrader, with K_d values of 34, 4.7, 8.3, 7.6, 9.6 and 7.6 nM against BRD2 (1), BRD2 (2), BRD3 (1), BRD3 (2), BRD4 (1) and BRD4 (2) , respectively. ARV-771 inhibits the transcription of AR/AR-v7 and its downstream target genes. By degrading BRD4 protein, ARV-771 enhances the sensitivity of prostate cancer cells to ferroptosis, suppresses cancer cell viability, and induces apoptosis. ARV-771 downregulates the levels of BRD4, c-MYC and AR-V7 in tumor tissues and inhibits tumor tissue growth. ARV-771 can be used in prostate cancer-related research.

ZXH-3-26 is a CRBN-recruiting BRD4 PROTAC degrader with a DC_50/5h of approximately 5 nM. ZXH-3-26 drives the ubiquitination and degradation of BRD4 by recruiting BRD4_BD1 to the CRL4^CRBN E3 ubiquitin ligase complex, thereby inhibiting the dynamic distribution of super-enhancers. ZXH-3-26 reverses TNF-α-induced impairment of the immunosuppressive function of mesenchymal stem cells, and affects RNA synthesis and the transcriptional elongation process of Pol II. ZXH-3-26 can be used in studies related to inflammatory arthritis, malignant tumors, and HIV latency.

A1874 is an orally active BRD4 PROTAC degrader with a DC₅₀ of 32 nM. A1874 degrades BRD4 via the ubiquitin-proteasome system by recruiting the MDM2 E3 ligase, while disrupting the MDM2-p53 interaction to stabilize p53 and upregulate p21, thereby inducing cell cycle arrest and apoptosis. A1874 exhibits selectivity for wild-type p53 cells and MDM2-amplified tumors, and it can be used in research on breast cancer, colorectal cancer, melanoma, lung cancer, lymphoma, myeloid leukemia, osteosarcoma, and glioblastoma.

SIM1 is a potent von Hippel-Lindau (VHL)-based trivalent PROTAC capable of degradation for all BET family members, with preference for BRD2 degradation (IC₅₀=1.1 nM; Kd=186 nM). SIM1 shows sustained anti-cancer activity.

IBG3 is a bivalent molecular glue degrader that targets BRD2 and BRD4, with an EC₅₀ of 32 nM and a Kd of 0.6 µM against human BRD4. IBG3 exhibits selectivity for BRD2 and BRD4 over BRD3. By recruiting the DCAF16 E3 ligase, IBG3 cis-binds to the tandem bromodomains of BRD2 and BRD4, enhances BRD-DCAF16 binding affinity, promotes ubiquitination and proteasomal degradation, and does not degrade isolated bromodomains. IBG3 lacks degradation selectivity for PSMA-positive and PSMA-negative prostate cancer cells, but shows lower in vivo antitumor efficacy than the PSMA-targeting conjugate IBG-P3, and can be used in prostate cancer-related research.

TMX1 is a covalent, selective BRD4 molecular glue degrader. TMX1 binds to the JQ1-binding site of BRD4BD2, forms covalent bonds with Cys58 of DCAF16 and Cys87 of GAK in a BRD4BD2-dependent template-assisted manner, stabilizes the BRD4-TMX1-DCAF16 ternary complex, and promotes the ubiquitination of BRD4 via the CRL4_DCAF16 ubiquitin ligase complex. TMX1 induces selective degradation of BRD4, mild degradation of BRD2 and BRD3, as well as DCAF16-dependent cytotoxicity.

IBG1 is a bivalent molecular glue degrader targeting BRD2/BRD4, with IC₅₀ values of 12.8 nM and 462 nM, respectively, and an EC₅₀ of 44 nM. By binding to the adjacent BD1 and BD2 bromodomains of BRD2 and BRD4, IBG1 stabilizes the ternary complex formed with DCAF16, thereby driving CRL-mediated ubiquitination and proteasomal degradation. IBG1 induces cancer cell apoptosis and inhibits cancer cell growth in a DCAF16-dependent manner, and downregulates MYC expression through DCAF16-independent BET bromodomain inhibition. IBG1 can be used in research of various cancers including prostate cancer.

MMH2 is a novel BRD4 molecular glue degrader that functions by recruiting the CUL4 and DCAF16 ligases to the second bromodomain of BRD4 (BRD4_BD2).

BRD4 degrader-1 (Compound mL 1-50) is a relatively selective, monovalent and covalent BRD4 Molecular glue degrader. BRD4 degrader-1 induces degradation of both long and short isoforms of BRD4 by targeting DCAF16 (an E3 ligase). BRD4 degrader-1 can be used in breast cancer research.

BRD4 degrader-3 is a molecular glue degrader targeting BRD4, with binding activity towards the BD1 and BD2 domains of BRD4. BRD4 degrader-3 regulates the activity of BRD4. BRD4 degrader-3 inhibits MYC expression in cancer cells. BRD4 degrader-3 suppresses cell proliferation. BRD4 degrader-3 can be used in research related to acute myeloid leukemia and prostate cancer.

MZP-54 is a PROTAC degrader that selectively targets BRD3/BRD4, with a DC₅₀ of < 0.05 μM in AML cells. MZP-54 recruits VHL to form a ternary complex, induces BRD3/BRD4 degradation via the ubiquitin-proteasome pathway, inhibits c-Myc expression, and exerts antiproliferative activity. MZP-54 can be used for the research of acute myeloid leukemia.

MMH1 is a novel BRD4 molecular glue degrader. MMH1 functions by recruiting the CUL4 DCAF16 ligase to the second bromodomain of BRD4 (BRD4 BD2). MMH1 binds to the JQ1-binding site of BRD4 BD2, acts as a template to covalently modify Cys58 of DCAF16, stabilizes the BRD4-DCAF16 ternary complex, and thereby promotes BRD4 degradation via the CRL4_DCAF16 ubiquitin ligase pathway. Using BRD4 BD2 as a structural template, MMH1 covalently modifies Cys87 of GAK and induces the GAK-BRD4 BD2 interaction. Through its covalent mechanism, MMH1 exhibits sustained BRD4 degradation activity, and shows selective degradation activity for BRD4 BD2 over BRD4 BD1.

PROTAC BET Degrader-12 (Compound 8b) is a PROTAC degrader for bromodomain and extra-terminal domain (BET)-containing proteins, which degrades the BRD3 and BRD4 in a DCAF11-dependent manner. PROTAC BET Degrader-12 inhibits cell viability of KBM7 with a DC₅₀ of 305.2 nM

BD-9136 is a selective BRD4 PROTAC degrader with a DC₅₀ of 1.2 nM, and exhibits a selectivity of ≥1000-fold over BRD2 and BRD3. BD-9136 preferentially forms a ternary complex with the BD1 domain of BRD4, and downregulates the expression of B7-H4 by disrupting the PR-P300-BRD4 axis. BD-9136 depletes BRD4 protein in tumor tissues, inhibits tumor growth, reduces B7-H4 protein expression, increases CD8+ T cell infiltration, and enhances tumor sensitivity to anti-PD-L1. Degradation of BRD4 by BD-9136 rescues the erythroid differentiation block induced by LSD1 inhibition, and transient administration restores erythroid output while retaining HbF induction. BD-9136 causes no adverse effects in mice at effective doses. BD-9136 can be used in studies related to acute myeloid leukemia, acute lymphoblastic leukemia and breast cancer.

JQ-1-Azidopropylamine is an Target Protein Ligand-Linker Conjugate that incorporates a ligand for BRD4 (HY-78695) and a PROTAC linker (HY-151862), which recruits E3 ligases. JQ-1-Azidopropylamine can be used for synthesis of PROTAC JY-21 (HY-174975).

TD-428 is a BRD4/BET PROTAC degrader. TD-428 induces the degradation of BRD4 and BET proteins via the ubiquitin-proteasome pathway by recruiting cereblon, thereby inhibiting C-MYC transcription and cancer cell proliferation. TD-428 can be used in the research of metastatic castration-resistant prostate cancer and prostate cancer.

SJ995973 is a BRD4 PROTAC degrader with DC₅₀ values of 0.87 nM (12 h) and 0.16 nM (24 h), respectively. SJ995973 induces the formation of a ternary complex between purified BRD4 and CRBN-DDB1 proteins, with an IC₅₀ of 17 nM against CRBN. SJ995973 inhibits the viability of human acute myeloid leukemia cells. SJ995973 can be used in studies related to acute myeloid leukemia and medulloblastoma.

β-NF-JQ1 is a BRD2/3/4 PROTAC degrader. β-NF-JQ1 recruits the AhR E3 ligase complex to BRD2, BRD3 and BRD4, induces AhR-BRD interaction, and mediates AhR-dependent degradation through the proximity effect between the target protein and AhR. β-NF-JQ1 acts as an antiproliferative and cytotoxic agent that induces anticancer activity associated with BRD protein knockdown. β-NF-JQ1 can be used for research on breast cancer and neuroblastoma.

SNIPER (BRD)-1 is a BRD2/3/4 SNIPER degrader. SNIPER (BRD)-1 induces ubiquitin-proteasome-dependent degradation of the epigenetic regulatory proteins BRD2/3/4 as well as the IAP family E3 ligase itself with its IC₅₀ values for cIAP1, cIAP2 and XIAP of 6.8 nM, 17 nM and 49 nM, respectively. SNIPER (BRD)-1 can be used in the research of prostate cancer.