| Autor: |
Roninson IB; Department of Drug Discovery and Biomedical Sciences, University of South Carolina, Columbia, SC 29208, USA.; Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia., Győrffy B; MTA TTK Lendület Cancer Biomarker Research Group, Institute of Enzymology, Hungarian Academy of Sciences, Magyar tudósok körútja 2., H-1117 Budapest, Hungary.; Department of Pediatrics, Semmelweis University, Tűzoltó utca 7-9, H-1094 Budapest, Hungary., Mack ZT; Department of Drug Discovery and Biomedical Sciences, University of South Carolina, Columbia, SC 29208, USA., Shtil AA; Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia.; Blokhin National Medical Research Center of Oncology, 115478 Moscow, Russia., Shtutman MS; Department of Drug Discovery and Biomedical Sciences, University of South Carolina, Columbia, SC 29208, USA., Chen M; Department of Drug Discovery and Biomedical Sciences, University of South Carolina, Columbia, SC 29208, USA., Broude EV; Department of Drug Discovery and Biomedical Sciences, University of South Carolina, Columbia, SC 29208, USA. broude@cop.sc.edu. |
| Abstrakt: |
CDK8 and CDK19 Mediator kinases are transcriptional co-regulators implicated in several types of cancer. Small-molecule CDK8/19 inhibitors have recently entered or are entering clinical trials, starting with breast cancer and acute myeloid leukemia (AML). To identify other cancers where these novel drugs may provide benefit, we queried genomic and transcriptomic databases for potential impact of CDK8, CDK19, or their binding partner CCNC. sgRNA analysis of a panel of tumor cell lines showed that most tumor types represented in the panel, except for some central nervous system tumors, were not dependent on these genes. In contrast, analysis of clinical samples for alterations in these genes revealed a high frequency of gene amplification in two highly aggressive subtypes of prostate cancer and in some cancers of the GI tract, breast, bladder, and sarcomas. Analysis of survival correlations identified a group of cancers where CDK8 expression correlated with shorter survival (notably breast, prostate, cervical cancers, and esophageal adenocarcinoma). In some cancers (AML, melanoma, ovarian, and others), such correlations were limited to samples with a below-median tumor mutation burden. These results suggest that Mediator kinases are especially important in cancers that are driven primarily by transcriptional rather than mutational changes and warrant an investigation of their role in additional cancer types. |
