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• W2067601412 abstract "Aurora kinases and cyclin-dependent kinases, which play critical roles in the cell cycle and are frequently overexpressed in a variety of tumors, have been suggested as attractive targets for cancer therapy. JNJ-7706621, a recently identified dual inhibitor of these kinases, is reported to induce cell cycle arrest, endoreduplication, and apoptosis. In the present study, we further investigated the molecular mechanisms underlying these effects. The inhibitor arrested various cells at G2 phase at low concentration, and at both G1 and G2 phases at high concentration. JNJ-7706621 did not prevent localization of Aurora A to the spindle poles, but did inhibit other centrosomal proteins such as TOG, Nek2, and TACC3 in early mitotic phase. Similarly, the drug did not prevent localization of Aurora B to the kinetochore, but did inhibit other chromosomal passenger proteins such as Survivin and INCENP. In the cells exposed to JNJ-7706621 after nocodazole release, Aurora B, INCENP, and Survivin became relocated to the peripheral region of chromosomes, but Plk1 and Prc1 were localized on microtubules in later mitotic phase. Treatment of nocodazole-synchronized cells with JNJ-7706621 was able to override mitotic arrest by preventing spindle checkpoint signaling, resulting in failure of chromosome alignment and segregation. Injection of the drug significantly inhibited the growth of TC135 Ewing’s sarcoma cells transplanted into athymic mice by cell cycle arrest and apoptosis. JNJ-7706621 is a unique inhibitor regulating cell cycle progression at multiple points, suggesting that it could be useful for cell cycle analysis and therapy of various cancers, including Ewing’s sarcoma. Keywords: Aurora, cell cycle, checkpoint, cyclin-dependent kinase, cytokinesis, Ewing’s sarcoma, Ewing’s sarcoma family of tumor, Inner centromere protein, Hematoxylin-Eosin, Polo-like kinase" @default.
• W2067601412 created "2016-06-24" @default.
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• W2067601412 date "2012-05-01" @default.
• W2067601412 modified "2023-10-03" @default.
• W2067601412 title "Growth Suppression and Mitotic Defect Induced by JNJ-7706621, an Inhibitor of Cyclin-Dependent Kinases and Aurora Kinases" @default.
• W2067601412 doi "https://doi.org/10.2174/156800912801784839" @default.
• W2067601412 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22463590" @default.
• W2067601412 hasPublicationYear "2012" @default.
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