Roles of microRNA let-7b in papillary thyroid carcinoma by regulating HMGA2
The incidence of thyroid cancer has increased significantly in the last decade, and the most frequent type of this cancer is papillary thyroid carcinoma. MicroRNAs have been demonstrated to be abnormally expressed in tumors and associated with the development of the tumors. Our aim was to analyze th...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2017-10-01
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| Series: | Tumor Biology |
| Online Access: | https://doi.org/10.1177/1010428317719274 |
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| author | Hongguang Li Lihong Zhao Zhenhua Zhang Heng Zhang Chao Ding Zijie Su |
| author_facet | Hongguang Li Lihong Zhao Zhenhua Zhang Heng Zhang Chao Ding Zijie Su |
| author_sort | Hongguang Li |
| collection | DOAJ |
| description | The incidence of thyroid cancer has increased significantly in the last decade, and the most frequent type of this cancer is papillary thyroid carcinoma. MicroRNAs have been demonstrated to be abnormally expressed in tumors and associated with the development of the tumors. Our aim was to analyze the role and molecular mechanisms of tumor suppressor let-7b in the papillary thyroid carcinoma. Expression of let-7b and high-mobility group A2 in papillary thyroid carcinoma tissues and cell lines was assessed using quantitative reverse transcription polymerase chain reaction and western blot analysis. To explore the role of let-7b or high-mobility group A2 in the BCPAP and TPC-1 cells, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and Transwell methods were used. Let-7b expression was significantly downregulated while expression of high-mobility group A2 was upregulated dramatically in papillary thyroid carcinoma tissues and cells compared with that in normal thyroid tissues and cells. In addition, overexpression of let-7b or knockdown of high-mobility group A2 inhibited cell migration and invasion compared with that of control. Besides, high-mobility group A2 was negatively regulated by let-7b in BCPAP cells. Moreover, high-mobility group A2 reintroduction reversed the anti-proliferation, anti-migration, and anti-invasion roles of let-7b. Let-7b might function as a tumor suppressor in papillary thyroid carcinoma by suppressing the expression of high-mobility group A2, and therefore might provide a promising therapeutic target for patients with papillary thyroid carcinoma. |
| format | Article |
| id | doaj-art-0f081cc74fd9496fa7b53fea01037264 |
| institution | DOAJ |
| issn | 1423-0380 |
| language | English |
| publishDate | 2017-10-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Tumor Biology |
| spelling | doaj-art-0f081cc74fd9496fa7b53fea010372642025-08-20T03:15:53ZengSAGE PublishingTumor Biology1423-03802017-10-013910.1177/1010428317719274Roles of microRNA let-7b in papillary thyroid carcinoma by regulating HMGA2Hongguang Li0Lihong Zhao1Zhenhua Zhang2Heng Zhang3Chao Ding4Zijie Su5Department of Thyroid Surgery, Henan Provincial People’s Hospital, Zhengzhou, ChinaCentral Sterile Department, Henan Provincial People’s Hospital, Zhengzhou, ChinaDepartment of Thyroid Surgery, Henan Provincial People’s Hospital, Zhengzhou, ChinaDepartment of Thyroid Surgery, Henan Provincial People’s Hospital, Zhengzhou, ChinaDepartment of Thyroid Surgery, Henan Provincial People’s Hospital, Zhengzhou, ChinaDepartment of Thyroid Surgery, Henan Provincial People’s Hospital, Zhengzhou, ChinaThe incidence of thyroid cancer has increased significantly in the last decade, and the most frequent type of this cancer is papillary thyroid carcinoma. MicroRNAs have been demonstrated to be abnormally expressed in tumors and associated with the development of the tumors. Our aim was to analyze the role and molecular mechanisms of tumor suppressor let-7b in the papillary thyroid carcinoma. Expression of let-7b and high-mobility group A2 in papillary thyroid carcinoma tissues and cell lines was assessed using quantitative reverse transcription polymerase chain reaction and western blot analysis. To explore the role of let-7b or high-mobility group A2 in the BCPAP and TPC-1 cells, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and Transwell methods were used. Let-7b expression was significantly downregulated while expression of high-mobility group A2 was upregulated dramatically in papillary thyroid carcinoma tissues and cells compared with that in normal thyroid tissues and cells. In addition, overexpression of let-7b or knockdown of high-mobility group A2 inhibited cell migration and invasion compared with that of control. Besides, high-mobility group A2 was negatively regulated by let-7b in BCPAP cells. Moreover, high-mobility group A2 reintroduction reversed the anti-proliferation, anti-migration, and anti-invasion roles of let-7b. Let-7b might function as a tumor suppressor in papillary thyroid carcinoma by suppressing the expression of high-mobility group A2, and therefore might provide a promising therapeutic target for patients with papillary thyroid carcinoma.https://doi.org/10.1177/1010428317719274 |
| spellingShingle | Hongguang Li Lihong Zhao Zhenhua Zhang Heng Zhang Chao Ding Zijie Su Roles of microRNA let-7b in papillary thyroid carcinoma by regulating HMGA2 Tumor Biology |
| title | Roles of microRNA let-7b in papillary thyroid carcinoma by regulating HMGA2 |
| title_full | Roles of microRNA let-7b in papillary thyroid carcinoma by regulating HMGA2 |
| title_fullStr | Roles of microRNA let-7b in papillary thyroid carcinoma by regulating HMGA2 |
| title_full_unstemmed | Roles of microRNA let-7b in papillary thyroid carcinoma by regulating HMGA2 |
| title_short | Roles of microRNA let-7b in papillary thyroid carcinoma by regulating HMGA2 |
| title_sort | roles of microrna let 7b in papillary thyroid carcinoma by regulating hmga2 |
| url | https://doi.org/10.1177/1010428317719274 |
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