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Article type: Research Article
Authors: Oh, Eun Hyea; 1 | Rhee, Je-Keunb; 1 | Shin, Jin-Honga | Cho, Jae Wooka | Kim, Dae-Seonga | Park, Ji-Yunc | Choi, Seo Youngd | Choi, Kwang-Dongd | Choi, Jae-Hwana; *
Affiliations: [a] Department of Neurology, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea | [b] School of Systems Biomedical Science, Soongsil University, Seoul, Korea | [c] Department of Neurology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea | [d] Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Biomedical Research Institute, Busan, Korea
Correspondence: [*] Corresponding author: Jae-Hwan Choi, MD, PhD. Department of Neurology, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Kumo-ro 20, Beomo-ri, Mulgum-eup, Yangsan, Gyeongnam, 50612, Korea. E-mail: rachelbolan@hanmail.net.
Note: [1] Eun Hye Oh and Je-Keun Rhee contributed equally to this work.
Abstract: OBJECTIVE:This study aimed to investigate the underlying pathogenesis of acute unilateral vestibulopathy (AUV) using gene expression profiling combined with bioinformatics analysis. METHODS:Total RNA was extracted from the peripheral blood mononuclear cells of ten AUV patients in the acute phase and from ten controls. The differentially expressed genes (DEGs) between these two groups were screened using microarray analysis with the cut-off criteria (|fold changes| > 1.5 and p-value < 0.05). Functional enrichment analysis of DEGs was performed using Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analysis, and the protein-protein interaction (PPI) network was constructed using the STRING (Search Tool for the Retrieval of Interacting Genes) database. RESULTS:There were 57 DEGs (50 up-regulated and 7 down-regulated) identified in the AUV group. Functional enrichment analysis showed that most of the up-regulated DEGs were significantly enriched in terms related to the neutrophil-mediated immune pathway. From the PPI network, the top ten hub genes were extracted by calculating four topological properties, and most of them were related to the innate immune system, inflammatory processes and vascular disorders. The complete blood count tests showed that the neutrophil-to-lymphocyte ratio was significantly higher in the 72 AUV patients than in the age-matched controls (2.93±2.25 vs 1.54±0.61, p < 0.001). CONCLUSIONS:This study showed that the neutrophil-mediated immune pathway may contribute to the development of AUV by mediating inflammatory and thrombotic changes in the vestibular organ.
Keywords: Acute unilateral vestibulopathy, bioinformatics analysis, immune system, neutrophil
DOI: 10.3233/VES-200044
Journal: Journal of Vestibular Research, vol. 30, no. 6, pp. 363-374, 2020
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