TTK and cancer: TTK (TTK Protein Kinase), a dual‐specific protein kinase, can phosphorylate tyrosine, serine, and threonine.[12] Previous studies have indicated that TTK is typically undetectable in normal cells but is significantly upregulated in various cancers.[13, 14, 15, 16, 17] Additionally, TTK promotes the metastatic potential of cancer cells, contributing to tumor progression and poor prognosis in several cancers.[18, 19] However, its role in atherosclerosis and postinjury restenosis has not been previously investigated.