In vitro activity: (+)-JQ1 PA (also known as (+)-JQ1 propargyl amide) is a novel propargyl amide derivative of (+)-JQ1 with IC50 of 10.4 nM for Bromodomain and extra-terminal (BET). It was created as a functionally conserved compound that is amenable to click chemistry and can be used as molecular probes in vitro and in vivo. (+)-JQ1 is a potent and highly specific BET (Bromodomain and extra terminal domain) bromodomain inhibitor, with IC50 of 77 nM and 33 nM for BRD4(1/2) in enzymatic assays. (–)-JQ1 shows no significant interaction with any bromodomain. Besides, (–)-JQ1 enantiomer is comparatively inactive in nuclear protein in testis (NUT) midline carcinoma (NMC). (+)-JQ1 has high specificity for BET in that it only binds to bromodomains of the BET family, but not to any bromodomains of non-BET family. (+)-JQ1 has potential antineoplastic activity against various cancers such as MM (Multiple myeloma), pancreatic ductal adenocarcinoma and ovarian cancer etc. Its mechanism of action is to inhibit c-MYC and upregulate p21. (+)-JQ1 has been used as a chemical probe to investigate the role of BET bromodomains in the transcriptional regulation of oncogenesis.

Kinase Assay: (+)-JQ1 is a potent and highly specific BET (Bromodomain and extra terminal domain) bromodomain inhibitor, with IC50 of 77 nM and 33 nM for BRD4(1/2) in enzymatic assays.

Cell Assay: Cells are seeded into white, 384-well microtiter plates at 500 cells per well in a total volume of 50 μL media. The 797, TT and TE10 cells are grown in DMEM containing 1% penicillin/streptomycin and 10% FBS. The Per403 cells are grown in DMEM containing 1 % penicillin/streptomycin and 20% FBS. Patient-derived NMC 11060 cells are grown in RPMI with 10% FBS and 1% penicillin/streptomycin. (+)-JQ1 is delivered to microtiter assay plates by robotic pin transfer. Following a 48 hours incubation at 37℃, cells are lysed and wells are assessed for total ATP content using a commercial proliferation assay. Replicate measurements are analyzed with respect to dose and estimates of IC50 are calculated by logistic regression (GraphPad Prism).