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Tan Z, Zhou P, Zhu Z, Wang Y, Guo Z, Shen M, Xiao Y, Shen W, Wu D. Upregulated long non‑coding RNA LincIN promotes tumor progression via the regulation of nuclear factor 90/microRNA‑7/HOXB13 in esophageal squamous cell carcinoma. Int J Mol Med 2021; 47:78. [PMID: 33693959 PMCID: PMC7979264 DOI: 10.3892/ijmm.2021.4911] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 02/18/2021] [Indexed: 12/09/2022] Open
Abstract
Long non-coding RNA LincIN has been reported to be overexpressed and to be involved in the metastasis of breast cancer. However, the expression and role of LincIN in esophageal squamous cell carcinoma (ESCC) remain unsolved. In the present study, LincIN expression was examined in ESCC by RT-qPCR, and the roles of LincIN in ESCC were determined using cell growth, migration and invasion assays. In addition, the effects of LincIN on nuclear factor 90 (NF90) and microRNA/miR (miR)-7 were examined by RNA immunoprecipitation assay, RT-qPCR, dual-luciferase reporter assay and western blot analysis. The results revealed that LincIN expression was significantly increased in ESCC tissues and cell lines. The increased expression of LincIN was positively associated with invasion depth, lymph node metastasis, TNM stage and a poor prognosis. Functional assays revealed that the overexpression of LincIN promoted ESCC cell growth, migration and invasion. Mechanistic analysis revealed that LincIN physically bound to NF90, enhanced the binding between NF90 and primary miR-7 (pri-miR-7), and further enhanced the inhibitory effects of NF90 on miR-7 biogenesis. Therefore, LincIN downregulated miR-7 expression in ESCC. The expression of miR-7 inversely correlated with that of LincIN in ESCC tissues. By downregulating miR-7, LincIN increased the expression of HOXB13, a target of miR-7. The overexpression of miR-7 or the depletion of HOXB13 both attenuated the tumor-promoting roles of LincIN in ESCC cell growth, migration and invasion. On the whole, the findings of the present study suggest that LincIN is overexpressed and plays an oncogenic role in ESCC via the regulation of the NF90/miR-7/HOXB13 axis. Thus, LincIN may prove to be a promising prognostic biomarker and therapeutic target for ESCC.
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Affiliation(s)
- Zhibo Tan
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Peitao Zhou
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Zhenru Zhu
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Ying Wang
- Department of Medical Oncology, National Cancer Centre/National Clinical Research Centre for Cancer/Cancer Hospital and Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, Guangdong 518116, P.R. China
| | - Zeqin Guo
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Mengying Shen
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Yazhi Xiao
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Weixi Shen
- Department of Oncology, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong 518100, P.R. China
| | - Dehua Wu
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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Boghaert ER, Austin V, Zimmer SG. The influence of the presence of adenovirus 5 E1a and E1b sequences on the pathology of rat embryonic fibroblasts transfected with activated c-Ha-ras and v-ras. Clin Exp Metastasis 1991; 9:231-43. [PMID: 2060183 DOI: 10.1007/bf01753727] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We compared the pathology of two groups of tumors following implantation of cells enmeshed in alginate beads into the syngeneic rat. The first group of tumors was generated by implanting alginate beads containing cloned embryonic fibroblasts (CREF) that were transfected with activated c-Ha-ras (T24) and v-ras (pH1) (CREF tumors). The second group was created by implantation of CREF cells that were transfected with E1a and E1b of wild type adenovirus type 5 prior to transfection with T24 and pH1 (Wt tumors). Alginate beads were implanted at three different sites in the rat, i.e. subcutaneous in the flank, subcutaneous in the tail and under the renal capsule. Tumorigenicity, invasiveness and metastatic capacity of the transfectant cell lines were determined. The tumor latency period (TLP), the doubling time of the tumors and the metastatic capacity of the cell lines depended on the site of implantation. Invasion was not influenced by site-dependency. Wt tumors were invasive and generally had longer TLP than the CREF tumors. Wt tumors did not metastasize to the lungs as opposed to CREF tumors. We concluded that the genetic background of Wt cells modulated the effect of ras transfection by stretching the TLP and by limiting the metastatic potential to the draining lymph nodes. Malignancy per se was not repressed since no differences in invasive capacity were noticed.
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Affiliation(s)
- E R Boghaert
- Department of Microbiology and Immunology, University of Kentucky, Lexington 40536
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Abstract
The influence of the primary implantation site on the metastatic behavior of a murine transitional cell carcinoma line (MBT-2) and three metastatic sublines (L3F1, L3F2, and L3F3) was studied. The parent MBT-2 cell line produced a low incidence of lung metastasis after intravenous injection and no metastases from the primary tumor when injected either subcutaneously in the right hind flank or in the footpad. Intramuscular implantation of the MBT-2 cells in the right hind flank resulted in a significant increase over the subcutaneous, footpad, and intravenous sites in the incidence and number of lung metastases. Three in vivo/in vitro selected metastatic sublines (L3F1, L3F2, and L3F3) were highly metastatic when injected subcutaneously, intramuscularly, and intravenously. A low number of pulmonary metastases was observed after footpad implantation of the three sublines. This study demonstrated a definite implantation site-influence on the metastatic ability of the parent MBT-2 line and the three selected sublines. Intramuscular implantation was the most permissive implantation site for the development of spontaneous metastasis for the MBT-2 line and the L3F1, L3F2, and L3F3 sublines.
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Affiliation(s)
- J E Klaunig
- Dept. of Pathology, Medical College of Ohio, Toledo 43699
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