Abstract:
:Oral cancer refers to the malignant tumors that occur in the oral cavity, of which 80% are squamous cell carcinomas. The incidence of oral cancer accounts for ~5% of the incidence of systemic malignancies, with rapid progression, extensive infiltration and poor prognosis. In the present study, Kinesin family member (KIF)20B, a member of Kinesin‑6 family, was identified as a potential biomarker which could promote cancer progression. A total of 82 patients were recruited and KIF20B expression levels were investigated by immunohistochemistry, and were divided into high and low groups based on the median of KIF20B expression levels. The clinicopathological features and survival‑associated data of the two groups were analyzed and the results were provided as a table and by a Kaplan‑Meier plot, respectively. Additionally, KIF20B was successfully silenced in two tongue cancer cell lines, CAL‑27 and TCA‑8113. MTT and colony formation assay were performed to determine the changes of cell proliferation in knocked down‑KIF20B cell lines. In addition, proliferation‑associated proteins Ki67 and PCNA were investigated, by western blotting. In animal experiments, subcutaneous tumor formation was performed with control cells and cells with knocked down KIF20B, to determine the inhibitory effect of KIF20B in vivo. Firstly, it was found that there was significantly high expression levels of KIF20B in tongue cancer patients (P<0.05). Patients with high expression of KIF20B had poorer clinicopathological results including tumor differentiation level, lymph node metastasis and clinical stages. The overall survival and relapse‑free survival of high‑expression group were also poor. Secondly, after successful establishment of cells with knocked down KIF20B, this resulted in a notable reduction in cell proliferation in vitro. Subsequent western blotting further confirmed that Ki67 and PCNA expression levels had a significant decline. Finally, it was demonstrated that knocking down KIF20B could inhibit tumor volume growth in vivo. In conclusion, the high level of KIF20B in oral squamous cell carcinoma was significantly associated with poor clinicopathological features and survival. KIF20B might promote cancer development through enhancing cell proliferation in vitro, and might be a potential biomarker of oral squamous cell carcinoma.
journal_name
Mol Med Repjournal_title
Molecular medicine reportsauthors
Li ZY,Wang ZX,Li CCdoi
10.3892/mmr.2019.9851subject
Has Abstractpub_date
2019-03-01 00:00:00pages
2202-2210issue
3eissn
1791-2997issn
1791-3004journal_volume
19pub_type
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