hdac in 4

HDAC-IN-4, a selective HDAC6 and HDAC10 inhibitor (pIC50s: 7.2 and 6.8 in the BRET assay), exhibits antitumoral activity.

c-Met/HDAC-IN-4, a dual inhibitor of c-Met/HDAC, exhibits an IC 50 value of 28.92 nM for c-Met. This compound effectively induces G 0 /G 1 phase cell cycle arrest and apoptosis in MDA-MB-231 breast cancer cells. Additionally, c-Met/HDAC-IN-4 suppresses both the proliferation and invasion of breast cancer cell lines.

CDK/HDAC-IN-4 is a highly selective dual inhibitor of cyclin-dependent kinase (CDK) and histone deacetylase (HDAC), with IC50 values of 88.4 nM and 168.9 nM, respectively. This compound exhibits antiproliferative effects in both hematologic and solid tumor cells. Additionally, CDK/HDAC-IN-4 induces apoptosis and S-phase cell cycle arrest in MV-4-11 cells. It has also demonstrated significant antitumor efficacy in an MV-4-11 xenograft model.

JAK/HDAC-IN-4 (compound 11 i) is a dual inhibitor targeting both JAK2 and HDAC6, with IC50 values of 0.49 nM and 12 nM respectively. It inhibits cell proliferation and the production of nitric oxide. In a mouse model induced by Imiquimod, JAK/HDAC-IN-4 ameliorates psoriasiform skin lesions with low toxicity.

PI3K/HDAC-IN-4 (Compound 31f) is a dual inhibitor targeting PI3K and HDAC, with an IC50 of 0.2μM. It demonstrates high selectivity for HDAC1-3, with IC50 values of 75.5 nM, 70.9 nM, and 1.9 nM, respectively. As a potent pan-PI3K inhibitor, PI3K/HDAC-IN-4 has IC50 values of 2.5 nM, 80.5 nM, 10.0 nM, and 57.2 nM for PI3Kα, β, δ, and γ, respectively. This compound effectively induces apoptosis in tumor cells by concurrently inhibiting the PI3K/AKT/mTOR signaling pathway and HDAC1-3. It shows significant antiproliferative activity across various tumor cell lines, such as MV4-11, Jeko-1, HL60, and MCF-7, with IC50 values of 0.2, 0.9, 0.8, and 1.5 μM, respectively. PI3K/HDAC-IN-4 is applicable in the study of lymphoma and leukemia.

Tubulin/HDAC-IN-4 (compound 9n) is a dual inhibitor targeting microtubules (Tubulin) and HDAC, exhibiting IC50 values of 0.73, 0.43, 0.62, and 2.34 µM for HDAC1, HDAC2, HDAC6, and HDAC7, respectively. It disrupts microtubule assembly by binding to the colchicine site and induces apoptosis and G2/M cell cycle arrest. Additionally, Tubulin/HDAC-IN-4 significantly increases intracellular ROS levels and demonstrates both anti-angiogenic and anticancer properties.

HDAC-IN-4-D4 is a deuterated compound of HDAC-IN-4 (T11542).

HDAC/HSP90-IN-4 significantly inhibited HDAC and HSP90 activity, with compound 20 (HDACIC50= 194 nM; HSP90αIC50= 153 nM) and compound 26 ((HDACIC50= 360 nM; HSP90αIC50= 77 nM) having the strongest HDAC and HSP90α inhibition. effect. Both compounds induced HSP90 expression and down-regulated HSP90 client proteins, which play an important role in the regulation of cancer cell survival and invasion.

HDAC4 CHDI Degrader 11 is a potent, selective degrader of HDAC4 (PROTAC) with DC_50 values of 4 nM and 6 nM in Jurkat E6-1 and Jurkat cells, respectively. This compound integrates the class IIa HDAC inhibitor trifluoromethyloxadiazole with a ligand for the Von Hippel-Lindau (VHL) protein through a linker. Demonstrating significant efficacy, HDAC4 CHDI Degrader 11 achieves a DC_50 value of 1 nM in a mouse cell model of Huntington's disease. For enhanced degradation in neuroblastoma cell lines, it can be administered alongside the P-glycoprotein inhibitor, Elacridar.

CDK4/6/HDAC-IN-1 (Compound N14) is a dual-target inhibitor of CDK4/6 and HDAC, with IC50 values of 7.23 nM for CDK4, 13.20 nM for CDK6, 55.66 nM for HDAC1, and 48.38 nM for HDAC6. It induces apoptosis and G0/G1 phase arrest through the HDAC-p21-CDK signaling pathway and can inhibit hepatocellular carcinoma.

HDAC3/BRD4-IN-1 (compound 26n) is an inhibitor of HDAC3/BRD4, exhibiting an IC50 of 8 nM for HDAC3, while its IC50 values for HDAC1 and HDAC2 are 220 nM and 120 nM, respectively. It displays anti-tumor and anti-proliferative effects by upregulating Ac-H3 and downregulating c-Myc. The half-life of HDAC3/BRD4-IN-1 in human liver microsomes is 29.36 minutes.

PROTAC HDAC6 degrader4 (Compound 17c) is a PROTAC that targets and degrades HDAC6, with a DC50 of 14 nM. It exhibits inhibitory activity against HDAC1, HDAC2, HDAC3, and HDAC6, with IC50 values of 2.2, 2.37, 0.61, and 0.295 μM, respectively. [Pink: ligand for target protein HDAC6 ligand-3; Black: linker; Blue: ligand for cereblon E3 ligase]

PROTACHDAC8 Degrader-3 (Compound BP6) is an efficient and selective HDAC8PROTAC degrader with low cytotoxicity, exhibiting a DC50 of 80 nM. It demonstrates IC50 values of 0.26 μM for HDAC8 and 30 μM for CRBN. PROTACHDAC8 Degrader-3 enhances Ac-SMC3 levels, stabilizes p53, and sensitizes cells to targeted agents such as Idasanutlin, indicating significant potential for combination therapy.

PROTACHDAC4 Degrader-1 (compound SCT-1) is a potent and selective PROTACHDAC4 degrader. It effectively reduces HDAC4 protein levels, induces S phase cell cycle arrest, and inhibits colony formation, leading to the suppression of tumor cell proliferation. The compound has demonstrated inhibitory activity in the H460 mouse model and is applicable in cancer research, including studies of lung cancer.

HDAC6-IN-4 (C10) is an orally active, highly selective HDAC6 inhibitor with an IC50 of 23 nM. It induces apoptosis and demonstrates potent anti-tumor effects while exhibiting non-significant toxicity.

HDAC1-IN-4 is a potent inhibitor of Plasmodium falciparum HDAC1 (PfHDAC1) with low cytotoxicity and antimalarial effects (IC50<5 nM).

G4/HDAC-IN-1, a dual-targeting compound for G4 and HDAC, shows inhibition of intracellular HDAC activity, with an IC50 value of 1.1 μM, and promotes G4 formation. It effectively inhibits proliferation and tumor growth in a TNBC xenograft model, presenting potential for cancer research applications.

HDAC8-IN-4 is a selective HDAC8 inhibitor with IC50 values of 0.15 μM for HDAC8 and 12 μM for HDAC3 [1].

HDAC/JAK/BRD4-IN-1 (compound 25ap) is a potent triple inhibitor targeting HDAC, JAK, and BRD4. This compound not only inhibits cell proliferation but also induces apoptosis in MDA-MB-231 cells and demonstrates in vivo anticancer efficacy [1].

HDAC4-IN-1 (compound 1a), a class IIa HDACI inhibitor with an IC 50 of 0.077 μM, exhibits anticancer activity by enhancing Caspase-induced apoptosis. It is also utilized in cancer drug combination research [1].

HDAC3-IN-4 is a selective and orally active inhibitor of HDAC3, boasting an IC50 of 89 nM. It induces the degradation of PD-L1 by modulating cathepsin B (CTSB) in lysosomes, with a DC50 of 5.7 μM. Compared to HDAC1, HDAC6, HDAC7, and HDAC8, HDAC3-IN-4 demonstrates superior selectivity for HDAC3.

HDAC-IN-40 is a potent alkoxyamide-based HDAC inhibitor with a Ki of 60 nM for HDAC2 and 30 nM for HDAC6, exhibiting antitumor effects.

HDAC-IN-42 (compound 14f) is a highly potent and selective inhibitor of histone deacetylase (HDAC) enzymes, with IC50 values of 0.19 μM for HDAC1 and 4.98 μM for HDAC6. It exhibits significant anticancer properties, inhibiting cell proliferation, inducing apoptosis, and causing cell cycle arrest specifically at the G2/M phase [1].

HDAC-IN-47 is an orally active histone deacetylase (HDAC) inhibitor, with IC50 values of 19.75 nM, 57.8 nM, 40.27 nM, 5.63 nM, and 302.73 nM for HDAC1, HDAC2, HDAC3, HDAC6, and HDAC8, respectively. HDAC-IN-47 can block the cell cycle in the G2/M phase, inhibit autophagy, induce apoptosis via the Bax/Bcl-2 and caspase-3 pathways, and exhibits anti-cancer activity in vivo.