PMID- 30282067 OWN - NLM STAT- MEDLINE DCOM- 20181102 LR - 20191210 IS - 1421-9778 (Electronic) IS - 1015-8987 (Linking) VI - 50 IP - 1 DP - 2018 TI - Circular RNA Expression Profile in Laryngeal Squamous Cell Carcinoma Revealed by Microarray. PG - 342-352 LID - 10.1159/000494010 [doi] AB - BACKGROUND/AIMS: A growing body of evidence has suggested that circular RNAs (circRNAs) have crucial functions in the regulation of gene expression, and their dysregulation has been implicated in various types of cancers. However, the roles of circRNAs in laryngeal cancer remain largely unknown. This study investigated the global changes in the expression pattern of circRNAs in laryngeal squamous cell carcinoma (LSCC) to identify potential differentially expressed circRNAs. METHODS: Microarray-based circRNA expression was determined in LSCC and paired normal laryngeal tissues. Pathway analyses of the genes producing differentially expressed circRNAs were performed to predict the function of circRNAs using standard enrichment computational methods. Expression levels of candidate circRNAs and microRNAs (miRNAs) were detected by quantitative real-time PCR. The circRNA/ miRNA interactions were constructed using bioinformatics methods to predict the binding of miRNA with circRNA. RESULTS: We identified 506 differentially expressed circRNAs from human LSCC and normal laryngeal mucosa tissues. We confirmed that hsa_circ_0044520 and hsa_circ_0044529 were significantly upregulated in LSCC tissues. The most likely potential target miRNAs for hsa_ circ_0044520 and hsa_circ_0044529 were hsa-miR-4726-5p and hsa-miR-4640-5p, respectively. Functional analysis showed that hsa_circ_0044520 and hsa_circ_0044529 were involved in the process of collagen synthesis. CONCLUSION: Competitive endogenous RNA network prediction and bioinformatics functional analysis revealed that hsa_circ_0044520 and hsa_circ_0044529 play important regulatory roles by sponging hsa-miR-4726-5p and hsa-miR-4640-5p, thereby providing novel insights into the tumorigenesis of LSCC. CI - (c) 2018 The Author(s). Published by S. Karger AG, Basel. FAU - Fan, Yue AU - Fan Y FAU - Xia, Xin AU - Xia X FAU - Zhu, Yingying AU - Zhu Y FAU - Diao, Wenwen AU - Diao W FAU - Zhu, Xiaoli AU - Zhu X FAU - Gao, Zhiqiang AU - Gao Z FAU - Chen, Xingming AU - Chen X LA - eng PT - Journal Article DEP - 20181003 PL - Germany TA - Cell Physiol Biochem JT - Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology JID - 9113221 RN - 0 (MicroRNAs) RN - 0 (RNA, Circular) RN - 63231-63-0 (RNA) SB - IM MH - Carcinoma, Squamous Cell/genetics/*pathology MH - Computational Biology MH - Gene Regulatory Networks/genetics MH - Humans MH - Laryngeal Neoplasms/genetics/*pathology MH - Male MH - MicroRNAs/metabolism MH - Middle Aged MH - Oligonucleotide Array Sequence Analysis MH - RNA/*metabolism MH - RNA, Circular MH - Transcriptome OTO - NOTNLM OT - Bioinformatics analysis OT - CircRNAs OT - Laryngeal squamous cell carcinoma OT - Microarray OT - miRNA sponges EDAT- 2018/10/04 06:00 MHDA- 2018/11/06 06:00 CRDT- 2018/10/04 06:00 PHST- 2018/01/01 00:00 [received] PHST- 2018/09/25 00:00 [accepted] PHST- 2018/10/04 06:00 [pubmed] PHST- 2018/11/06 06:00 [medline] PHST- 2018/10/04 06:00 [entrez] AID - 000494010 [pii] AID - 10.1159/000494010 [doi] PST - ppublish SO - Cell Physiol Biochem. 2018;50(1):342-352. doi: 10.1159/000494010. Epub 2018 Oct 3.