NEK6

NIMA-related kinase 6 (NEK6) is a serine/threonine kinase that regulates cell cycle progression, mitotic spindle assembly, and microtubule dynamics^[1][2]. Mechanistically, NEK6 interacts with Smad4 to inhibit TGFβ/Smad-mediated transcription, blocking nuclear translocation and counteracting growth arrest in tumor models^[3]. NEK6 also contributes to endocytic trafficking by regulating early and recycling endosome morphology and cargo sorting, a function distinct from NEK7 which shares partial overlapping roles^[4]. In disease contexts, NEK6 mediates castration-resistant prostate cancer by maintaining androgen-independent proliferation and activating transcription factors such as FOXJ2^[5]. In neurodegenerative models, NEK6 modulates poly(PR)-induced p53-related DNA damage in C9orf72-associated frontotemporal dementia and ALS, indicating its broader relevance beyond oncology^[6]. Compared with related isoforms, NEK6 exhibits unique substrate specificity, particularly for Y-box binding protein-1 (YBX1) and Smad4, and forms protein complexes that localize at centrosomes and cytoplasmic networks^[1][2][5]. Preclinical studies suggest that inhibition of NEK6, alone or combined with CDK4/6 inhibitors, effectively suppresses tumor growth and rescues cellular toxicity in neuronal models, highlighting its potential as a targetable kinase^[6][7]. Therefore, NEK6 serves as a multifunctional regulator of mitotic control, intracellular trafficking, and stress responses, with implications for cancer therapy and neurodegenerative disease research^{[1][2][3][4][5][6][7]}.

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