Transcription profiling of peripheral B cells in antibody-positive primary Sjogren's syndrome reveals upregulated expression of CX3CR1 and a type I and type II interferon signature

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Transcription profiling of peripheral B cells in antibody-positive primary Sjogren's syndrome reveals upregulated expression of CX3CR1 and a type I and type II interferon signature

Imgenberg-Kreuz, Juliana (author): Uppsala universitet,Science for Life Laboratory, SciLifeLab,Molekylär medicin,Reumatologi

Sandling, Johanna K. (author): Uppsala universitet,Science for Life Laboratory, SciLifeLab,Reumatologi

Bjork, A. (author): Karolinska Institutet

Nordlund, J. (author): Uppsala universitet,Molekylär medicin,Science for Life Laboratory, SciLifeLab

Kvarnstrom, M. (author): Karolinska Institutet

Eloranta, Maija-Leena (author): Uppsala universitet,Reumatologi,Science for Life Laboratory, SciLifeLab

Rönnblom, Lars (author): Uppsala universitet,Reumatologi,Science for Life Laboratory, SciLifeLab

Wahren-Herlenius, M. (author): Karolinska Institutet

Syvänen, Ann-Christine, 1950- (author): Uppsala universitet,Molekylär medicin,Science for Life Laboratory, SciLifeLab

Nordmark, Gunnel (author): Uppsala universitet,Reumatologi,Science for Life Laboratory, SciLifeLab

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2018-04-18
2018
English.
In: Scandinavian Journal of Immunology. - : Wiley. - 0300-9475 .- 1365-3083. ; 87:5

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Journal article (peer-reviewed)

Abstract Subject headings

B cells play a key role in the pathogenesis of primary Sjogren's syndrome (pSS). The aim of this study was to analyse the transcriptome of CD19+ B cells from patients with pSS and healthy controls to decipher the B cell-specific contribution to pSS. RNA from purified CD19+ B cells from 12 anti-SSA antibody-positive untreated female patients with pSS and 20 healthy blood donors was subjected to whole transcriptome sequencing. A false discovery rate corrected significance threshold of <0.05 was applied to define differential gene expression. As validation, gene expression in B cells from 17 patients with pSS and 16 healthy controls was analysed using a targeted gene panel. RNA-sequencing identified 4047 differentially expressed autosomal genes in pSS B cells. Upregulated expression of type I and type II interferon (IFN)-induced genes was observed, establishing an IFN signature in pSS B cells. Among the top upregulated and validated genes were CX3CR1, encoding the fractalkine receptor involved in regulation of B-cell malignancies, CCL5/RANTES and CCR1. Increased expression of several members of the TNF superfamily was also identified; TNFSF4/Ox40L, TNFSF10/TRAIL, TNFSF13B/BAFF, TNFRSF17/BCMA as well as S100A8 and -A9/calprotectin, TLR7, STAT1 and STAT2. Among genes with downregulated expression in pSS B cells were SOCS1 and SOCS3, CD70 and TNFAIP3/A20. We conclude that B cells from patients with anti-SSA antibody-positive pSS display immune activation with upregulated expression of chemokines, chemokine receptors and a prominent type I and type II IFN signature, while suppressors of cytokine signalling are downregulated. This adds insight into the autoimmune process and suggests potential targets for future functional studies.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Immunologi inom det medicinska området (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Immunology in the medical area (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Reumatologi och inflammation (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Rheumatology and Autoimmunity (hsv//eng)

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine; and Immunology in th ...

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