Long Non-Coding RNA NLIPMT as a Tumor Suppressor and Inhibitor of Cell Proliferation and Metastasis in Papillary Thyroid Carcinoma

• Main Authors: Zhang F, Cai Y, Diao B, Song D, Miao R, Zhang B, Hu Y, Zeng H, Hu X
• Format: Article
• Language: English
• Published: Dove Medical Press 2020-10-01
• Series: Cancer Management and Research
• Subjects: papillary thyroid carcinoma; long non-coding rna; invasion; proliferation; metastasis
• Online Access: https://www.dovepress.com/long-non-coding-rna-nlipmt-as-a-tumor-suppressor-and-inhibitor-of-cell-peer-reviewed-article-CMAR

Fen Zhang,1,2,* Yangjun Cai,1,3,* Biyu Diao,1 Dandan Song,1 Rongrong Miao,1 Baodan Zhang,1 Yingying Hu,1 Hanqian Zeng,1 Xiaoqu Hu1 1Department of Thyroid and Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China; 2Department of Oncology, Dajiangdong Hospital of Hangzhou First People’s Hospital Group, Hangzhou, Zhejiang, People’s Republic of China; 3Department of Thyroid and Breast Surgery, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Taizhou, Zhejiang, People’s Republic of China*These authors contributed equally to this workCorrespondence: Xiaoqu HuDepartment of Thyroid and Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, People’s Republic of ChinaEmail [e-mail]: Gene expression association studies of tumor samples have uncovered several long non-coding RNAs (lncRNAs) closely related to various types of cancer. Several lncRNAs have been reported to play essential roles in the progression of papillary thyroid carcinoma (PTC). Novel lncRNA inhibiting proliferation and metastasis (lnc-NLIPMT) is a known regulator of mammary cell proliferation and motility, but its involvement in PTC is unclear.Materials and Methods: We investigated the role of lnc-NLIPMT in PTC by quantitative real-time polymerase chain reaction (qRT-PCR) on various PTC tissue samples and cell lines. We assessed the effects of overexpression or knockdown of lnc-NLIPMT on the proliferation, migration, and invasion of PTC cells using CCK-8, cell clone formation, and transwell assays. Changes in the expression of N-cadherin and vimentin were detected by immunoblotting.Results: Our results revealed a downregulation of the expression of lnc-NLIPMT in PTC and a negative correlation between lnc-NLIPMT expression and tumor size (P=0.006). Overexpression of lnc-NLIPMT in TPC-1 and B-CPAP cells significantly suppressed cell proliferation, migration, and invasion, while lnc-NLIPMT knockdown had the opposite effect. In addition, lnc-NLIPMT played an important role in the regulation of the expression of N-cadherin and vimentin.Conclusion: lnc-NLIPMT inhibits cell proliferation and metastasis of PTC cells and is a potential diagnostic and prognostic biomarker in PTC.Keywords: papillary thyroid carcinoma, long non-coding RNA, invasion, proliferation, metastasis