HDAC2 Inhibitor

HDAC3-IN-5 (9c) is a HDAC3 selective inhibitor, with IC₅₀ values of 4.2 nM, 1629 nM and 298.2 nM for HDAC3, HDAC2, HDAC1, respectively. HDAC3-IN-5 (9c) can effectively induce apoptosisin MV4-11 cells in vitro and reduce the expression of anti-apoptotic proteins, the development of HDAC3 selective inhibitors may serve as a potential lead compound to reverse Venetoclax resistance.

Syk/HDAC6-IN-1 is a dual SYK/HDAC6 selective inhibitor with IC₅₀ values of 0.19 nM (SYK) and 0.66 nM (HDAC6). Syk/HDAC6-IN-1 downregulates p-SYK to block downstream AKT/FOXO1 signaling, elevates acetylated histone H3 and α-tubulin via HDAC suppression, represses SREBF1 -mediated lipid biosynthetic pathways, triggers G0/G1 cell cycle arrest and robust mitochondrial-dependent caspase-3-mediated apoptosis in leukemia cells. Syk/HDAC6-IN-1 can be used for the research of FLT3-mutant acute myeloid leukemia.

ZSNI-21 is a ADAM17/HDAC2 inhibitor with ADAM17 IC₅₀ 0.939 μM and HDAC2 IC₅₀ 0.844 μM. ZSNI-21 regulates the expression of apoptosis-related proteins (Bax, Bcl-2) and Cyclin D1, and induces apoptosis.. ZSNI-21 can be used for the research of hepatocellular carcinoma, breast cancer, and non-small cell lung cancer.

PHD2/HDACs-IN-1 is a potent PHD2/HDACs hybrid inhibitor (IC₅₀s of 1.15 μM, 19.75 μM, 26.60 μM and 15.98 μM for PHD2, HDAC1, HDAC2 and HDAC6, respectively). PHD2/HDACs-IN-1 is a low-toxicity renoprotective agent for research of cisplatin-induced acute kidney injury (AKI).

Valproic acid (VPA) sodium (2:1) is an orally active HDAC inhibitor, with IC₅₀ in the range of 0.5 and 2 mM, also inhibits HDAC1 (IC₅₀, 400 μM), and induces proteasomal degradation of HDAC2. Valproic acid sodium (2:1) activates Notch1 signaling and inhibits proliferation in small cell lung cancer (SCLC) cells. Valproic acid sodium (2:1) is used in the treatment of epilepsy, bipolar disorder, metabolic disease, HIV infection and prevention of migraine headaches.

GSK-3β/HDAC-IN-1 (Compd 4) is a brain-penetrant and first in class dual non-ATP-competitive Glycogen Synthase Kinase 3β/Histone Deacetylases (GSK-3β/HDACs) Inhibitor with IC₅₀s of 0.142, 0.03 and 0.045 μM against GSK-3β, HDAC2 and HDAC6, respectively. GSK-3β/HDAC-IN-1 can be used for Alzheimer’s disease research.

HDAC8-IN-3 (compound P19) is a potent HDAC8 inhibitor with IC₅₀ value of 9.3 μM and produces thermal stabilization. HDAC8-IN-3 has cytotoxicity and induces apoptosis in leukemic cell lines.

PI3K/HDAC-IN-2 is a potent dual PI3K/HDAC inhibitor with IC₅₀s of 226 nM, 279 nM, 467 nM, 29 nM for PI3Kα, PI3Kβ, PI3Kγ, PI3Kδ, respectively, and IC₅₀s of 1.3 nM, 3.4 nM, 972 nM, 17 nM, 12 nM for HDAC1, HDAC2, HDC4, HDAC6, HDAC8, respectively. PI3K/HDAC-IN-2 exhibits PI3Kδ and class I and IIb HDAC selectivity. PI3K/HDAC-IN-2 has remarkable anticancer effects.

HDAC1-IN-3 is a potent Pf HDAC1 inhibitor. HDAC1-IN-3 shows antimalarial activity in wild-type and multidrug-resistant parasite strains. HDAC1-IN-3 shows a significant in vivo killing effect against all life cycles of parasites.

KH-1 is a KRAS^G12D/HDAC2 dual-target inhibitor with K_d values of 11.63 nM and 20.17 nM, respectively. KH-1 induces pancreatic cell apoptosis, cell cycle arrest, and inhibits cell proliferation, invasion and migration, as well as suppresses tumor growth in pancreatic cancer xenograft models. KH-1 can be used for the research of pancreatic cancer.

Wee1/HDAC-IN-1 is a dual Wee1/HDAC inhibitor with an IC₅₀ of 1.2 nM for Wee1 and IC₅₀ values of 196 nM for HDAC1, 156 nM for HDAC3, and 55 nM for HDAC6. Wee1/HDAC-IN-1 exhibits strong antiproliferative activity against MV4-11 cells with an IC₅₀ of 0.076 μM. Wee1/HDAC-IN-1 selectively binds to Wee1 and HDACs. Wee1/HDAC-IN-1 interferes with DNA damage repair pathways and induces apoptosis in MV4-11 cells. Wee1/HDAC-IN-1 Wee1/HDAC-IN-1 can be used for the research of acute myeloid leukemia (AML).

CM-545, the cis-isomer of CM-414 (HY-119316), is a dual inhibitor of PDE5, HDAC1, HDAC2, HDAC3, and HDAC6 with pIC₅₀ values of 7.47, 6.65, 6.14, 6.55, and 6.84, repectively.

HDAC1-IN-10 (Compound 2b) is a potent, selective and orally active HDAC1/2 inhibitor with IC₅₀ values of 6 and 190 nM. HDAC1-IN-10 shows IC₅₀ > 50 μM for HDAC3-8. HDAC1-IN-10 can inhibit tumor growth in HCT-116 colon xenograft nude mice model. HDAC1-IN-10 can be used for research of colon cancer.

ZWZH-21 is a selective and orally active HDAC1/2 dual inhibitor with IC₅₀ values of 34 nM for HDAC1 and 41 nM for HDAC2. ZWZH-21 can inhibit HCT116 and SW480 cells growth with IC₅₀ values of 0.524 μM and 1.063 μM, respectively. ZWZH-21 can inhibit proliferation and migration and induces apoptosis in multiple colorectal cancer cells. ZWZH-21 can be used for the research of cancer, such as colorectal cancer.

SM-06-09 is a potent, highly selective, orally active tetrazolone-based HDAC6 inhibitor with an IC₅₀ value of 0.49 nM. SM-06-09 promotes tumor-associated macrophage (TAM) polarization toward an antitumor M1-like phenotype and enhances macrophage phagocytosis, antigen presentation, and T-cell activation. SM-06-09 remodels the tumor immune microenvironment, exhibits antitumor activity in melanoma models, and enhances the efficacy of anti-PD-1 immune checkpoint blockade.

ST13, an ortho-hydroxyanilide, is a selective, slow- and tight-binding HDAC1 and HDAC2 inhibitor with IC₅₀s of 23 nM and 49 nM, respectively. ST13 shows a weak inhibition of HDAC3 (IC₅₀ = 4.30 μM) and HDAC6 (IC₅₀ > 10 μM). The induced fit mechanism of ST13 proceeds through a two-step process: first, the enzyme and inhibitor rapidly form a collision complex (EI), which then slowly transforms into the stable complex E*I. ST13 induces apoptosis in cancer cells. ST13 can be used for the study of melanoma and triple-negative breast.

HDAC-IN-88 (Compound HJ-9) is the inhibitor for HDAC that inhibits HDAC6, HDAC1, HDAC2, HDAC8 and HDAC3 with IC₅₀s of 0.226, 1.103, 2.308, 3.255 and 3.864 μM, respectively. HDAC-IN-88 inhibits the proliferation of cancer cell HepG2, HCT116 and MV4-11 with IC₅₀ of 5.47, 9.78 and 0.38 μM, inhibits the migration of HCT116, arrests the cell cycle at G0/G1 phase, and induces apoptosis and autophagy in MV4-11. HDAC-IN-88 reduces ROS level and mitochondrial membrane potential. HDAC-IN-88 exhibits antimalarial activity that inhibits P. falciparum 3D7 with EC₅₀ of 165 nM. HDAC-IN-88 also exhibits anti-angiogenic activity.

HDAC-IN-99 is a histone deacetylase (HDAC) inhibitor with an IC₅₀ of 37.73 nM, and it exhibits potent inhibitory activity against HDAC1 (IC₅₀ = 48.09 nM), HDAC2 (IC₅₀ = 300.28 nM) and HDAC6 (IC₅₀ = 9.16 nM). HDAC-IN-99 exerts broad-spectrum antiproliferative activity in various cancer cell lines. HDAC-IN-99 induces S-phase cell cycle arrest and apoptosis in colon cancer cells, increases the acetylation levels of histone H3, histone H4 and α-tubulin, and upregulates the expression of p21 as well as the cleavage of caspase-3. HDAC-IN-99 displays antitumor activity in colon cancer xenograft models. HDAC-IN-99 can be used for the research of colon cancer.

HDAC-IN-38 (compound 13) is a potent HDAC inhibitor. HDAC-IN-38 shows similar micro-molar inhibitory activity toward HDAC1, 2, 3, 5, 6, and 8. HDAC-IN-38 increases cerebral blood flow (CBF), attenuates cognitive impairment, and improves hippocampal atrophy. HDAC-IN-38 also increases the level of histone acetylation (H3K14 or H4K5).

HDAC-IN-100 is a histone deacetylase inhibitor with an IC₅₀ of 0.038 μM against HDAC1, 0.283 μM against HDAC2, and 0.586 μM against HDAC3. HDAC-IN-100 acts as a chemosensitizer and apoptosis inducer, activates caspase 3/7, and reverses Cisplatin (HY-17394) resistance. HDAC-IN-100 exerts antiproliferative effects in ovarian cancer cells and squamous cancer cells. HDAC-IN-100 is applicable for research related to ovarian cancer, squamous cell carcinoma, and Cisplatin (HY-17394)-resistant squamous cell carcinoma.