Abstract：
:The KH type splicing regulatory protein (KSRP) is a nucleic acid binding protein, which negatively regulates the stability and/or translatability of many mRNA species encoding immune-relevant proteins. As KSRP is expressed in immune cells including T and B cells, neutrophils, macrophages and dendritic cells, we wanted to analyze its importance for the development of autoimmune diseases. We chose collagen antibody-induced arthritis (CAIA) as an appropriate autoimmune disease mouse model in which neutrophils and macrophages constitute the main effector cell populations. We compared arthritis induction in wild type (WT) and KSRP-/- mice and paws were taken for histological sections and qPCR analysis. Furthermore, we determined the frequencies of spleen immune cells by flow cytometry. Cytokine levels in spleen cell supernatants were determined by cytometric bead array analyses (CBA). After CAIA induction we unexpectedly observed in WT animals much stronger swelling of the paws than in KSRP-/- mice. In accordance, histological staining of paw sections of KSRP-/- animals revealed much lower frequencies of infiltrating immune cells in the joints compared to WT animals. Furthermore, CAIA-treatment resulted in reduced expression of several inflammatory factors (like CXCL-1, iNOS, TNF-α and S100A8) as well as immune cell marker genes (e.g. LFA-1, CD68, Ly6G) in the joints of KSRP-/- mice. Spleen cells of KSRP-/- mice showed lower frequencies of myeloid cells. On cytokine level IFN-γ production was increased in spleen cells of KSRP-/- mice compared to WT samples. These data surprisingly suggest that the absence of KSRP protects against the induction of inflammatory arthritis.
journal_name
Mol Immunoljournal_title
Molecular immunologyauthors
Käfer R,Schrick K,Schmidtke L,Montermann E,Hobernik D,Bros M,Chen CY,Kleinert H,Pautz Adoi
10.1016/j.molimm.2017.05.003subject
Has Abstractpub_date
2017-07-01 00:00:00pages
207-216eissn
0161-5890issn
1872-9142pii
S0161-5890(17)30119-0journal_volume
87pub_type
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