The invention relates to the field of
tumor detection, in particular to a
hepatocellular carcinoma TKI
drug resistance marker and application thereof. The invention reveals the expression level of
methyltransferase SMYD3, the expression level of MELK, MELK trimethylation and direct association between IGF1R activity and the
drug resistance of
hepatocellular carcinoma for the first time, and through systematic experimental
verification, it is confirmed that SMYD3 is remarkably and highly expressed in a
drug-resistant
hepatocellular carcinoma cell line of the revatinib and tissues of a drug-resistant patient of the hepatocellular
carcinoma. According to the present invention, the recombinant
plasmid is capable of regulating the expression and the trimethylation of MELK so as to activate the activity of IGF1R, such that the hepatocellular
carcinoma lenvatinib drug resistance is finally caused, and the recombinant
plasmid has significant potential as the
lenvatinib drug resistance detection marker. According to the present invention, with the detection of the SMYD3 expression level, the MELK expression level, the MELK trimethylation and the IGF1R
activity level, the
drug resistance condition of the patient to the
lenvatinib can be accurately reflected, the powerful tool is provided for the
clinical diagnosis, and the kit can be used for guiding the timely adjustment of the
treatment strategy, and has important social and
economic benefits.