Title:Dysregulation of miR-551b-5p and SETD2 Predicts Poor Prognosis and
Promotes Migration and Invasion of Thyroid Cancers
Volume: 23
Issue: 11
Author(s): Anbing Dong, Ming Gao*, Xiangqian Zheng and Xianhui Ruan
Affiliation:
- Department of Thyroid and Neck Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical
Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for
Cancer, Tianjin, 300040, China
- Department of Thyroid and Breast Surgery, Tianjin Union Medical Center, Tianjin, 300121, China
- Tianjin
Key Laboratory of General Surgery Inconstruction, Tianjin Union Medical Center, Tianjin, 300121, China
Keywords:
miR-551b-5p, SETD2, prognosis, thyroid carcinoma, cell lines, CCK-8.
Abstract:
Objective: This study was to investigate the clinical significance of miR-551b-5p and
SETD2 in thyroid cancers (TC) and their effects on the biological function of TC cells.
Methods: The expression level of miR-551b-5p and SETD2 in tumor/nontumor tissues and TC cell
lines was measured by quantitative real-time polymerase chain reaction (RT-qPCR). Subsequently,
the relationship between miR-551b-5p or SETD2 expression and the clinicopathological feature
was detected by Chi-square analysis. Kaplan-Meier and multivariate Cox regression analyses were
used to assess their prognostic values. Finally, the regulatory effects of miR-551b-5p and SETD2
on the proliferation, migration and invasion ability of TC cells were detected by CCK-8 and
Transwell assays.
Results: Compared with non-tumor groups, the expression of miR-551b-5p was significantly increased
in patients' tissues and TC cell lines, while SETD2 mRNA expression was decreased. Patients
with up-regulated miR-551b-5p or downregulated SETD2 mRNA in TC showed more positive
lymph node metastasis and advanced TNM stage. High miR-551b-5p expression level and low
SETD2 mRNA level were related to poor survival rate. miR-551b-5p and SETD2 might be potential
prognostic biomarkers for TC. miR-551b-5p knockdown can inhibit cell proliferation, migration
and invasion by targeting SETD2.
Conclusion: miR-551b-5p and SETD2 may be valuable prognostic biomarkers and new therapeutic
targets for TC.