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Article Abstract
Background: The aim of this study was to identify the molecular mechanism of dysregulation of B cell subpopulations of primary Sjögren's syndrome (pSS) at the transcriptome level.
Methods: We enrolled patients with pSS (n = 6) and healthy controls (HCs) (n = 6) in the discovery cohort using microarray and pSS (n = 14) and HCs (n = 12) in the validation cohort using quantitative PCR (qPCR). Peripheral B cells acquired from these subjects were separated by cell sorting into four subsets: CD38IgD (Bm1), CD38IgD (naive B cells), CD38IgD (pre-germinal centre B cells) and CD38IgD (memory B cells). We performed differentially expressed gene (DEG) analysis and weighted gene co-expression network analysis (WGCNA).
Results: Expression of the long non-coding RNA LINC00487 was significantly upregulated in all B cell subsets, as was that of HLA and interferon (IFN) signature genes. Moreover, the normalized intensity value of LINC00487 significantly correlated with the disease activity score of all pSS B cell subsets. Studies of human B cell lines revealed that the expression of LINC00487 was strongly induced by IFNα. WGCNA revealed six gene clusters associated with the B cell subpopulation of pSS. Further, SOX4 was identified as an inter-module hub gene.
Conclusion: Our transcriptome analysis revealed key genes involved in the dysregulation of B cell subpopulations associated with pSS.
Trial Registration: Not required.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7310138 | PMC |
| http://dx.doi.org/10.1186/s13075-020-02248-2 | DOI Listing |
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