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Transcriptional CDK inhibitors as potential treatment option for testicular germ cell tumors

ABSTRACT: Type II testicular germ cell tumors (TGCT) are the most frequently diagnosed solid malignancy in young men. Up to 15 % of patients with metastatic non-seminomas show cisplatin resistance having a very poor survival rate due to lacking treatment options. Transcriptional cyclin-dependent kinases (CDK) have been shown to be effective targets in treatment of different types of cancer. Here, we investigated the effects of the CDK inhibitors dinaciclib, flavopiridol, YKL-5-124, THZ1, NVP2, SY0351 and THZ531. XTT viability assay revealed strong cytotoxic impact of CDK7/ 12/ 13 inhibitor SY0351 and CDK9 inhibitor NVP2 on the TGCT wild type cell lines (2102EP, NCCIT, TCam2) and the cisplatin resistant cell lines (2102EP-R, NCCIT-R). The CDK7 inhibitor YKL-5-124 showed strong impact on 2102EP, 2102EP-R, NCCIT and NCCIT-R cell lines leaving the MPAF control cell line mostly unaffected. FACS based analysis revealed mild effects on the cell cycle of 2102EP and TCam2 cells after SY0351, YKL-5-124 or NVP2 treatment. Molecular analysis showed a cell line specific response for SY0351 and NVP2 inhibition while YKL-5-124 induced similar molecular changes in 2102EP, TCam2 and MPAF cells. Thus, after TGCT subtype determination CDK inhibitors might be a potential alternative for optimized and individualized therapy independent of chemotherapy sensitivity.

ORGANISM(S): Homo sapiens

PROVIDER: GSE198248 | GEO | 2022/03/26

REPOSITORIES: GEO

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