Liu Xiaoli, Fu Qingfeng, Li Shijie, Liang Nan, Li Fang, Li Changlin, Sui Chengqiu, Dionigi Gianlorenzo, Sun Hui
Division of Thyroid Surgery, Jilin Provincial Key Laboratory of Surgical Translational Medicine, China-Japan Union Hospital of Jilin University, Changchun, China.
Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood "G. Barresi", University Hospital "G. Martino", University of Messina, Messina, Italy.
Front Endocrinol (Lausanne). 2019 Apr 8;10:207. doi: 10.3389/fendo.2019.00207. eCollection 2019.
Long non-coding RNA FOXD2 Adjacent Opposite Strand RNA 1 (FOXD2-AS1) has been widely reported to be implicated in the progression and recurrence of several cancers. The clinical significance and functional role of FOXD2-AS1 in thyroid carcinoma remain unknown. FOXD2-AS1 expression was evaluated by analyzing thyroid cancer RNA sequencing dataset from The Cancer Genome Atlas (TCGA). and were performed to assess the biological roles of FOXD2-AS1 in thyroid cancer cells. Western blot, luciferase, immunoprecipitation (IP), and RNA immunoprecipitation (RIP) assays were used to identify the underlying miRNA and mRNA target mediating the biological roles of FOXD2-AS1 in thyroid cancer cells. FOXD2-AS1 was upregulated in thyroid carcinoma tissues and cells. High expression of FOXD2-AS1 significantly correlated with clinical stage, recurrence of thyroid carcinoma. Silencing FOXD2-AS1 inhibited cancer stem cell-like phenotypes and attenuates the anoikis resistance . Downregulating FOXD2-AS1 represses the tumorigenesis of thyroid carcinoma cells . FOXD2-AS1 acts as a competitive endogenous RNA (ceRNA) for miR-7-5p, up-regulating the expression of telomerase reverse transcriptase (TERT), which further promotes the cancer stem cells features and anoikis resistance in thyroid cancer cells. Our findings indicate that FOXD2-AS1 functions as an oncogenic regulator in the development of thyroid cancer, contributing to early recurrence of thyroid cancer.
长链非编码RNA FOXD2相邻反义链RNA 1(FOXD2-AS1)已被广泛报道与多种癌症的进展和复发有关。FOXD2-AS1在甲状腺癌中的临床意义和功能作用尚不清楚。通过分析来自癌症基因组图谱(TCGA)的甲状腺癌RNA测序数据集来评估FOXD2-AS1的表达。并进行实验以评估FOXD2-AS1在甲状腺癌细胞中的生物学作用。采用蛋白质免疫印迹法、荧光素酶报告基因检测法、免疫沉淀(IP)和RNA免疫沉淀(RIP)实验来鉴定介导FOXD2-AS1在甲状腺癌细胞中生物学作用的潜在miRNA和mRNA靶点。FOXD2-AS1在甲状腺癌组织和细胞中上调。FOXD2-AS1的高表达与甲状腺癌的临床分期、复发显著相关。沉默FOXD2-AS1可抑制癌症干细胞样表型并减弱失巢凋亡抗性。下调FOXD2-AS1可抑制甲状腺癌细胞的肿瘤发生。FOXD2-AS1作为miR-7-5p的竞争性内源性RNA(ceRNA),上调端粒酶逆转录酶(TERT)的表达,进而促进甲状腺癌细胞中的癌症干细胞特征和失巢凋亡抗性。我们的研究结果表明,FOXD2-AS1在甲状腺癌发生过程中起致癌调节作用,促进甲状腺癌的早期复发。