Histone Demethylases

CPI-455 hydrochloride is a potent pan-KDM5 inhibitor, exhibiting an IC50 of 10 nM for KDM5A. This compound effectively inhibits KDM5 activity, leading to an increase in global levels of H3K4me3. It has demonstrated the ability to reduce the population of drug-tolerant persister cancer cells across various cancer cell line models subjected to standard chemotherapy or targeted treatments, making it a valuable tool for cancer research and therapeutic development.

LSD1/HDAC6-IN-2 is a potent inhibitor targeting LSD1, HDAC6, and MAO-A, with IC50 values of 5 nM, 11 nM, and 5 nM, respectively. It demonstrates significant inhibitory effects on the growth of multiple myeloma cell lines, including MM.1S, MM.1R, and RPMI-8226. This compound is suitable for research applications focused on acute myeloid leukemia and lymphoma, providing insights into potential therapeutic mechanisms.

HDAC6-IN-3 is a potent inhibitor of histone deacetylase 6 (HDAC6), with an IC50 ranging from 0.02 to 1.54 μM for various HDAC isoforms, including HDAC1, HDAC2, HDAC3, and HDAC8. Additionally, it exhibits significant inhibitory activity against monoamine oxidase A (MAO-A) with an IC50 of 0.79 μM and lysine-specific demethylase 1 (LSD1). This compound serves as a valuable tool for research applications in cancer biology and epigenetics and is equipped with an alkyne functionality, enabling it to participate in copper-catalyzed azide-alkyne cycloaddition (CuAAc).

LSD1-IN-20 is a potent dual non-covalent inhibitor of lysine-specific demethylase 1 (LSD1) and G9a, exhibiting Ki values of 0.44 and 0.68 μM, respectively. This compound demonstrates significant antiproliferative effects in THP-1 leukemia and MDA-MB-231 breast cancer cell lines, with IC50 values of 0.51 and 1.60 μM over 72 hours. LSD1-IN-20 serves as a valuable tool for research focused on epigenetic regulation and its implications in cancer biology.

ML234 is a dual inhibitor targeting EZH2 and LSD1, exhibiting IC50 values of 0.09 μM and 0.12 μM, respectively. This compound demonstrates significant antiproliferative effects in prostate cancer cell lines, including LNCAP, PC3, and 22RV1. In vivo studies reveal that ML234 effectively suppresses tumor growth in the 22RV1 xenograft mouse model, making it a valuable tool for research focused on anticancer therapies in prostate cancer.

JMJD1C-IN-1 is a selective inhibitor of JMJD1C with an IC50 of 0.59 μM and a Kd of 1.96 μM. This compound effectively disrupts the binding of JMJD1C to the H3K9me2 peptide substrate as demonstrated in the HTRF assay, showing an IC50 of 1.47 μM. JMJD1C-IN-1 enhances tumor immunotherapy research by impairing intratumoral regulatory T (Treg) cell fitness through the accumulation of H3K9me2, which downregulates PD1 expression, and by reducing STAT3 demethylation, thereby promoting STAT3 activation. Furthermore, it exhibits dose-dependent antitumor efficacy across various mouse cancer models, including fibrosarcoma, melanoma, lung cancer, hepatocellular carcinoma, and colorectal cancer.

Higenamine hydrochloride is a selective inhibitor of LSD1, with an IC50 value of 1.47 μM. This compound exhibits anti-inflammatory and antibacterial properties, and has been shown to attenuate IL-1β-induced apoptosis via the ROS-mediated PI3K/Akt signaling pathway. Additionally, Higenamine hydrochloride protects brain cells from oxygen deprivation and promotes bone formation in osteoporosis through the SMAD2/3 pathway. Its versatile applications make it suitable for research in cancer, inflammation, cardiorenal syndrome, and related diseases.