• 1. Clinical Medicine College of Cuizhou Medical University, Guiyang 550004, P. R. China;
  • 2. Department of Thyroid Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, P. R. China;
  • 3. Department of General Surgery, The Sencond Affiliated Hospital of Guizhou Medical University, Kaili, Guizhou 556000, P. R. China;
ZHAO Daiwei, Email: zhaodw@hotmail.com
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Objective To investigate relationship of long non-coding RNA FoxP4-AS1 expression with lymph node metastasis (LNM) of papillary thyroid carcinoma (PTC).Methods Real time fluorescent quantitative polymerase chain reaction was used to detect the expression level of FoxP4-AS1 in 52 cases of PTC tissues and corresponding adjacent tissues, PTC cells (TPC-1, B-CPAP, K1), and normal thyroid follicular epithelial cells (Nthy-ori3-1). Univariate and multivariate analysis were used to identify the influencing factors of LNM in PTC. Receiver operating characteristic (ROC) curve was drawn to evaluate the predictive value of influencing factors of LNM in PTC.Results The expression level of FoxP4-AS1 in the PTC tissues was significantly decreased as compared with the corresponding adjacent tissues (t=7.898, P<0.001), which in the different cells had statistical difference (F=29.866, P<0.001): expression levels in the TPC-1 and K1 cells were lower than Nthy-ori3-1 cells (P<0.05) and in the B-CPAP cells and Nthy-ori3-1 cells had no statistical difference (P>0.05) by multiple comparisons. Univariate analysis showed that the extraglandular invasion (χ2=4.205, P=0.040)and low expression of FoxP4-AS1 (χ2=7.144, P=0.008) were the influencing factors of LNM in PTC. Binary logistic regression analysis showed that extraglandular invasion [OR=9.455, 95%CI (1.120, 79.835), P=0.039] and low expression ofFoxP4-AS1[OR=5.437, 95%CI (1.488, 19.873), P=0.010] were risk factors for LNM of PTC. The area under the ROC curve ofFoxP4-AS1,extraglandular invasion alone, and combination of the two were 0.679, 0.656, and 0.785, respectively.Conclusions FoxP4-AS1 is down-regulated in PTC. Low level of FoxP4-AS1 is a risk factor for LNM of PTC. Combined detection of expression level of FoxP4-AS1 and extraglandular invasion has a high predictive value for LNM of PTC.

Citation: TANG Rui, YANG Huifang, GAO Qingjun, LUO Xue, CHEN Xinghong, ZHAO Daiwei. Expression of long non-coding RNA FoxP4-AS1 in papillary thyroid carcinoma and its relationship with lymph node metastasis. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2021, 28(5): 566-570. doi: 10.7507/1007-9424.202101002 Copy

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