RNA and RNA-RBP Relationships Shown by Microarray Data Guang-Bin Wang, Ni-Ni Rao, Chang-Long Dong, and Xiao-Qin Lyu
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Identification of the Potential Function of circRNA in Hypertrophic Cardiomyopathy Based on Mutual RNA- RNA and RNA-RBP Relationships Shown by Microarray Data Guang-Bin Wang, Ni-Ni Rao, Chang-Long Dong, and Xiao-Qin Lyu Citation: Wang Guang-Bin, Rao Ni-Ni, Dong Chang-Long, Lyu Xiao-Qin. Identification of the Potential Function of circRNA in Hypertrophic Cardiomyopathy Based on Mutual RNA-RNA and RNA-RBP Relationships Shown by Microarray Data[J]. Journal of Electronic Science and Technology, 2021, 19(1): 41-52. doi: 10.1016/j.jnlest.2021.100097 View online: https://doi.org/10.1016/j.jnlest.2021.100097 Articles you may be interested in Pei-Xin Liu, Zhao-Sheng Zhu, Xiao-Feng Ye, Xiao-Feng Li. Conditional Random Field Tracking Model Based on a Visual Long Short Term Memory Network[J]. Journal of Electronic Science and Technology, 2020, 18(4): 308-319. doi: 10.1016/j.jnlest.2020.100031 Juan Zhou, Ying Shen, Ya-Juan Xue, Li Li. 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Components and Development in Big Data System: A Survey[J]. Journal of Electronic Science and Technology, 2019, 17(1): 51-72. doi: 10.11989/JEST.1674-862X.80926105 Follow JEST WeChat public account for more information JOURNAL OF ELECTRONIC SCIENCE AND TECHNOLOGY, VOL. 19, NO. 1, MARCH 2021 41 Digital Object Identifier: 10.1016/j.jnlest.2021.100097 Article Number: 100097 Identification of the Potential Function of circRNA in Hypertrophic Cardiomyopathy Based on Mutual RNA-RNA and RNA-RBP Relationships Shown by Microarray Data Guang-Bin Wang | Ni-Ni Rao* | Chang-Long Dong | Xiao-Qin Lyu Abstract—The pathogenesis of hypertrophic cardiomyopathy (HCM) is very complicated, particularly regarding the role of circular RNA (circRNA). This research pays special attention to the relationships of the circRNA-mediated network, including RNA-RNA relationships and RNA-RNA binding protein (RNA-RBP) relationships. We use the parameter framework technology proposed in this paper to screen differentially expressed circRNA, messenger RNA (mRNA), and microRNA (miRNA) from the expression profile of samples related to HCM. And 31 pairs of circRNA and mRNA relationship pairs were extracted, combined with the miRNA targeting database; 145 miRNA-mRNA relationship pairs were extracted; 268 circRNA-mRNA-miRNA triads were established through the common mRNA in the 2 types of relationship pairs. Thus, 268 circRNA-miRNA regulatory relationships were deduced and 30 circRNA- RBP relationship pairs were analyzed at the protein level. On this basis, a circRNA-mediated regulatory network corresponding to the two levels of RNA-RNA and RNA-RBP was established. And then the roles of circRNA in HCM were analyzed through circRNA-mRNA, circRNA-miRNA, and circRNA-RBP, and the possible role in disease development mas inferred. Index Terms—circular RNA (circRNA), circular RNA-messanger RNA-microRNA (circRNA-mRNA-miRNA), co- expression network, functions analysis, hypertrophic cardiomyopathy, regulatory network, RNA-binding protein (RNA- RBP). 1. Introduction Hypertrophic cardiomyopathy (HCM) is a common genetic cardiovascular disease caused by excessive hypertrophy of the myocardium and characterized by thickening of the left ventricular wall[1]. *Corresponding author Manuscript received 2020-09-22; revised 2020-11-02. This work was supported by the National Natural Science Foundation of China under Grant No. 61872405; the Key R&D program of Sichuan Province under Grant No. 2020YFS0243; the Key Project of Natural Science Foundation of Guangdong Province under Grant No. 2016A030311040. G.-B. Wang is with the School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054; also with the Computer Department, Chengdu College of University of Electronic Science and Technology of China, Chengdu 610097 (e-mail: [email protected]). N.-N. Rao, C.-L. Dong, and X.-Q. Lyu are with the School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054 (e-mail: [email protected]). Color versions of one or more of the figures in this paper are available online at http://www.journal.uestc.edu.cn. Publishing editor: Xin Huang 42 JOURNAL OF ELECTRONIC SCIENCE AND TECHNOLOGY, VOL. 19, NO. 1, MARCH 2021 The mutation of the junctophilin-2 (JPH2) gene is the cause of HCM and the main genetic cause of left ventricular hypertrophy and myofilament disorders, and the PH2 protein is a member of the junctophilin family and is mainly expressed in the heart[2]. At the transcriptome level, HCM is closely related to the expression levels of mRNA, microRNA (miRNA), and circRNA. A recent study showed that HCM is usually associated with missense mutations in the MYH6 and MYH7 genes. Silencing specific MYH6 alleles in mice can reduce the incidence of HCM[3]. Jin and Chen found that abnormal miR-145-5p expression affects circRNA in oxygen glucose deprivation-induced (OGD-induced) cell damage by upregulating miRNA-145-5p and the mitogen- activated extracellular signal-regulated kinase (MEK)/extracellular signal-regulated kinases (ERK) pathway to activate the mammalian target of rapamycin (mTOR) and silence circRNA_0010729, thereby protecting against HCM damage[4]. The CYTOR gene may activate the protein kinase B (PKB) and NF-kB signaling pathways through miR-155 to inhibit cardiac hypertrophy, most possibly through serving as ceRNA for miR- 155 to counteract the miR-155-mediated repression of the inhibitor of nuclear factor kappa-B kinase subunit epsilon (IKBKE)[5]. The circRNAs DNAJC6, TMEM56, and MBOAT2 can be used together to distinguish between healthy patients and who with HCM. In addition, circTMEM56 and circDNAJC6 can be used as indicators of disease severity in hypertrophic obstructive cardiomyopathy patients[6]. Thus, the circRNAs regulate gene expression at the transcriptional and post-transcriptional levels and participate in various biological processes, leading to the occurrence of HCM[7],[8]. At the protein level, the p.I603M mutation is mapped to the C4 domain of the cardiac myosin-binding protein (cMyBPC). It was found that the stability of C4 I603M was severely impaired in HCM, so p.I603M was used as a basis for reclassification of variants[9]. Serum N-terminal pro-B-type natriuretic peptide (NT-proBNP) and cardiac troponin I (cTnI) concentrations have been used to indicate the presence of a variety of heart diseases, including HCM, in various species[10]. circRNA is a non-coding RNA molecule that does not have a 5'end cap or a 3'end poly (A) tail and forms a ring structure with covalent bonds. Because circRNA is usually produced by special variable shearing, more than 80% of circRNAs contain protein exons, and has a large number of identical sequences with homologous mRNA, which acts as a sponge for adsorbing miRNA. circRNA participates in the pathological process of various diseases through spongy miRNA, but the role of circRNA in HCM is still unclear. The currently used circRNA annotation tool, circRNADb (http://reprod.njmu.edu.cn/cgi-bin/circrnadb/ resources.php)[11] is a comprehensive database of circRNA molecules in humans. It is difficult to prove the role of circRNA in disease development based on circRNA-mRNA-miRNA. Therefore, the RNA-RNA and RNA-binding protein (RNA-RBP) relationships noted in this article were used to speculate on the possible role of circRNA in HCM. The results were confirmed by Gene Ontology (GO)[12] and Kyoto Encyclopedia of Genes and Genomes (KEGG)[13] enrichment analysis and by using an experimentally verified database, which is more helpful for functional annotation of circRNA, especially in HCM research. Therefore, the method used in the present paper also has potential value for studying the role of circRNA in other complex diseases. 2. Materials The Gene Expression Omnibus (GEO, http://www.ncbi.nlm.nih.gov/geo/) is an international public repository for high-throughput microarray datasets, we used the keywords “circRNA” and “HCM” to search for relevant information. Datasets related to HCM were obtained, including the human circRNA expression profile (ID: GSE148602), which included case (n = 15 HCM samples) and control (n = 7 normal samples) data, and the miRNA expression profile (ID: GSE36946), which contained case (n = 107 HCM samples) and control (n = 20 normal samples) data. Datasets related to HCM can be downloaded from GitHub (https://github.com/ wgb2098/HCM). WANG et al.: Identification of the Potential Function of circRNA in Hypertrophic Cardiomyopathy Based on··· 43 3. Overview of Methods As shown in Fig. 1, the method used in this study consists of three steps: The 1st step, the construction of circRNA-mediated co-expression and regulatory relationship pairs; the 2nd step, the construction of the circRNA-mediated co-expression and regulatory network based on the 1st step and the deduction of circRNA- related relationship pairs; the 3rd step, functional analysis. In Fig. 1, PCC is the Pearson correlation coefficient and SCC is the Spearman coefficient. In this section, we will describe the three steps in detail.