TINCR inhibits the proliferation and invasion of laryngeal squamous cell carcinoma by regulating miR-210/BTG2

Abstract

Background Terminal differentiation-induced ncRNA (TINCR) plays an essential role in epidermal differentiation and is involved in the development of various cancers. Methods qPCR was used to detect the expression level of TINCR in tissues and cell lines of laryngeal squamous cell carcinoma (LSCC). The potential targets of TINCR were predicted by the bioinformation website. The expression of miR-210 and BTG2 genes were detected by qPCR, and the protein levels of BTG2 and Ki-67 were evaluated by western blot. CCK-8 assay, scratch test, and transwell chamber were used to evaluate the proliferation, invasion, and metastasis ability of LSCC cells. The relationships among TINCR, miR-210, and BTG2 were investigated by bioinformatics software and luciferase reporter assay. The in vivo function of TINCR was accessed on survival rate and tumor growth in nude mice. Results We used qRT-PCR to detect the expression of TINCR in laryngeal squamous cell carcinoma (LSCC) tissues and cells and found significantly lower levels in cancer tissues compared with adjacent tissues. Additionally, patients with high TINCR expression had a better prognosis. TINCR overexpression was observed to inhibit the proliferation and invasion of LSCC cells. TINCR was shown to exert its antiproliferation and invasion effects by adsorbing miR-210, which significantly promoted the proliferation and invasion of laryngeal squamous cells. Overexpression of miR-210 was determined to reverse the tumour-suppressive effects of TINCR. BTG2 (anti-proliferation factor 2) was identified as the target gene of miR-210, and BTG2 overexpression inhibited the proliferation and invasion of LSCC cells. BTG2 knockdown relieved the inhibitory effects of TINCR on the proliferation and invasion of LSCC. Finally, TINCR upregulation slowed xenograft tumour growth in nude mice and significantly increased survival compared with control mice. Conclusion The results of this study suggest that TINCR inhibits the proliferation and invasion of LSCC by regulating the miR-210/BTG2 pathway, participates in cell cycle regulation, and may become a target for the treatment of LSCC.

Diagnostic and Prognostic Value of microRNAs in Patients with Laryngeal Cancer: A Systematic Review

“…Of those, 166 were excluded for describing HNSCC cases without focus on the larynx ( n = 28), for being exclusively in vitro studies ( n = 39), for having a number of patients less than 10 or for using patient data from public databases ( n = 50), for not quantifying miRNAs in patient samples ( n = 43) and for other reasons, such as for not having statistically significant results or wrong miRNA sequence ( n = 6). Finally, the review was performed on a total of 177 studies [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 …”

Elevated BTG2 improves the radiosensitivity of non‐small cell lung cancer (NSCLC) through apoptosis

“…BTG2 is expressed at low levels in multiple cancers and might therefore act as a tumor suppressor. [25][26][27] BTG2 plays an important role in cell proliferation, migration, invasion and drug resistance. 28,29 Little research has been performed on the biological behavior of BTG2 in response to IR stress.…”

“…The B cell translocation gene 2 (BTG2) is one of the BTG/TOB family genes. BTG2 is expressed at low levels in multiple cancers and might therefore act as a tumor suppressor 25–27 . BTG2 plays an important role in cell proliferation, migration, invasion and drug resistance 28,29 .…”

Role and mechanism of miR-548-3p/DAG1 in the occurrence and malignant transformation of laryngeal carcinoma.

“…From the perspective of molecular pathology, the root cause of malignant tumors is the accumulation of DNA mutations. The accumulation of mutations leads to the large expression of proteins that promote cell growth, making cell cycle control abnormal [12][13][14] . Primary laryngeal carcinoma is a kind of squamous cell carcinoma, and its malignancy ranks in the forefront of all cancers [15][16] .…”