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Chinese Journal of Stomatological Research(Electronic Edition) ›› 2022, Vol. 16 ›› Issue (04): 208-218. doi: 10.3877/cma.j.issn.1674-1366.2022.04.002

• Column for OLP·Original Article • Previous Articles     Next Articles

Screening differentially expressed genes in salivary exosomes of oral lichen planus by lncRNA microarray

Wenxin Zuo1, Li Yuan2, Tianhui Yang2, Jianming Tang2, Zhiyi Zhou3, Fei He2,()   

  1. 1. Department of Stomatology, The University of Hong Kong-Shenzhen Hospital, Shenzhen 518053, China
    2. Stomatology Center, Shenzhen People′s Hospital, Shenzhen 518020, China
    3. Stomatology Center, Shenzhen Luohu Hospital Group, Shenzhen 518001, China
  • Received:2022-05-20 Online:2022-08-01 Published:2022-10-10
  • Contact: Fei He
  • Supported by:
    Science and Technology Planning Project of Shenzhen(JCYJ20190807145815129, JCYJ20180228164611173)

Abstract:

Objective

To screen the abnormal expression of long non-coding RNAs (lncRNAs) and mRNA by lncRNA expression microarray in oral lichen planus (OLP) salivary exosomes, and to analyze and explore the possible molecular mechanism of lncRNA and mRNA in the occurrence and development of OLP.

Methods

Saliva samples from 9 OLP patients and 3 healthy controls were collected to isolate exosomes. Then, exosomes were detected by nanoparticle tracking analysis (NTA) , transmission electron microscopy and western blot analysis of exosome-specific biomarkers. The expression profiles of lncRNA and mRNA in the salivary exosomes of erosive OLP patients (EOLP group) and reticulated OLP patients (ROLP group) were compared with those of healthy controls by lncRNA expression microarray, and the differentially expressed genes were screened. The differential genes were analyzed by Gene Ontology (GO) functional enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) signaling pathway enrichment analysis.

Results

NTA, transmission electron microscopy and Western blot confirmed the isolation of exosomes. Compared with the control group, there were 267 differentially expressed lncRNAs in the EOLP group, including 99 up-regulated and 168 down-regulated lncRNAs, and there were 122 differentially expressed mRNAs, of which 38 were up-regulated and 84 were down-regulated. There were 201 differentially expressed lncRNAs in the ROLP group, of which 83 were up-regulated and 118 were down-regulated, and there were 86 differentially expressed mRNAs, of which 32 were up-regulated and 54 were down-regulated. There were 50 identical differentially expressed mRNAs and 128 identical differentially expressed lncRNAs in the two groups. GO and KEGG analysis showed that differentially expressed genes involved in gene transcription, protein translation, immune response and other biological processes.

Conclusions

In this study, we determined the expression profile of lncRNA and mRNA in salivary exosomes of OLP patients, and identified differentially expressed lncRNAs and mRNAs associated with OLP. These lncRNAs and mRNAs may serve as important candidates for diagnosis and elucidate the pathogenesis of OLP.

Key words: Lichen planus, oral, Saliva, Exosomes, Long Noncoding RNA, RNA, messenger

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