Project description:We tested if Brd2 inhibitor ABBV-744 could reduce SARS-CoV-2 infection in Syrian Hamsters. Three days post-infection, the lungs of hamsters were harvested and subjected to RNA-seq. Infected, but untreated, hamsters showed marked up-regulation of a number of genes including ISGs when compared to uninfected controls. In contrast, hamsters treated with ABBV-744 showed a down-regulation of ISG levels, confirming ABBV-744 activity. Thus, Brd2 inhibition can decrease SARS-CoV-2 infection in Syrian Hamsters.
Project description:To have a global picture of the targets of the mir-744-5p, we assessed transcriptome changes, by deep-sequencing, of HeLa cells transfected with this miRNA or a control miRNA (cel-miR-231).
Project description:We used microarrays to detail the differentially expressed miRNA before and after down-regulation of miR-744 in lung cancer cell lines by genome-wide expression microarray To gain insights into the molecular mechanism of miR-744 in the promotion of malignant phenotype of lung cancer cells, we analyzed the mRNAs differentially expressed before and after miR-744 down-regulation.
Project description:Primary objectives: The primary objective is to investigate circulating tumor DNA (ctDNA) via deep sequencing for mutation detection and by whole genome sequencing for copy number analyses before start (baseline) with regorafenib and at defined time points during administration of regorafenib for treatment efficacy in colorectal cancer patients in terms of overall survival (OS).
Primary endpoints: circulating tumor DNA (ctDNA) via deep sequencing for mutation detection and by whole genome sequencing for copy number analyses before start (baseline) with regorafenib and at defined time points during administration of regorafenib for treatment efficacy in colorectal cancer patients in terms of overall survival (OS).
Project description:Here we report the discovery of ABBV-744, a first in class, highly potent and selective inhibitor of BET family BD2 domains with drug like properties. ChIP-seq analysis revealed that ABBV-744 displaced BRD4 from AR-containing super enhancers and elicited potent inhibition of AR-dependent transcription without causing broad transcription alterations associated with exposure to pan BET inhibitors.
Project description:Dual bromodomain BET inhibitors (DbBi) that bind with similar affinities to the first and second bromodomains across BRD2, BRD3, BRD4 and BRDt only displayed modest activity as monotherapy in clinical trials. Thrombocytopenia, closely followed by symptoms characteristic of GI toxicity, have presented as dose limiting adverse events that may prevented escalation to higher dose levels for more robust efficacy. ABBV-744 is a highly selective inhibitor for the second bromodomain (BD2) of the four BET family proteins. In contrast to the broad antiproliferative activities observed with DbBi, ABBV-744 displayed significant antiproliferative activities largely but not exclusively in cancer cell lines derived from AML and androgen receptor (AR) positive prostate cancer. Studies in AML xenograft models demonstrated anti-tumor efficacy for ABBV-744 that was comparable to the pan-BET inhibitor ABBV-075 but with improved tolerability. Enhanced anti-tumor efficacy was also observed with the combination of ABBV-744 and the Bcl-2 inhibitor, venetoclax (ABT-199) compared to monotherapies of either agent alone. These results collectively support the clinical evaluation of ABBV-744 in AML (Clinical Trials.gov identifier: NCT03360006).