KIF24 controls the clustering of supernumerary centrosomes in pancreatic ductal adenocarcinoma cells
Mashima, Y.; Nohira, H.; Sugihara, H.; Dynlacht, B. D.; Kobayashi, T.; Itoh, H.
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Clustering of supernumerary centrosomes, potentially leading to cell survival and chromosomal instability, is frequently observed in cancers. However, the molecular mechanisms by which centrosome clustering is controlled in cancer cells remain largely unknown. A centrosomal kinesin, KIF24, was previously shown to restrain the assembly of primary cilia in mammalian cells. Here, we revealed that KIF24 depletion suppresses multipolar spindle formation by clustering centrosomes in pancreatic ductal adenocarcinoma (PDAC) cells harboring supernumerary centrosomes. KIF24 depletion also induced hyperproliferation and improved the mitotic progression in PDAC cells. On the other hand, disruption of primary cilia failed to affect the proliferation and spindle formation in KIF24-depleted cells. These results represent a novel role of KIF24 in suppressing centrosome clustering independent of primary ciliation in centrosome-amplified PDAC cells.
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