Exploring the Role of Chemokine Receptor 6 (Ccr6) in the BXD Mouse Model of Gulf War Illness

文献类型: 外文期刊

第一作者: Gao, Jun

作者: Gao, Jun;Xu, Fuyi;Starlard-Davenport, Athena;Jones, Byron C.;Lu, Lu;Gao, Jun;Miller, Diane B.;O'Callaghan, James P.

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关键词: Ccr6; GWI; DFP; CORT; BXD strain; RNA-seq; neuroinflammation

期刊名称:FRONTIERS IN NEUROSCIENCE ( 影响因子:4.677; 五年影响因子:4.993 )

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年卷期: 2020 年 14 卷

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收录情况: SCI

摘要: Gulf War illness (GWI) is a chronic and multi-symptomatic disorder with persistent neuroimmune symptomatology. Chemokine receptor 6 (CCR6) has been shown to be involved in several inflammation disorders in humans. However, the causative relationship betweenCCR6and neuroinflammation in GWI has not yet been investigated. By using RNA-seq data of prefrontal cortex (PFC) from 31 C57BL/6J X DBA/2J (BXD) recombinant inbred (RI) mouse strains and their parental strains under three chemical treatment groups - saline control (CTL), diisopropylfluorophosphate (DFP), and corticosterone combined with diisopropylfluorophosphate (CORT+DFP), we identifiedCcr6as a candidate gene underlying individual differences in susceptibility to GWI. TheCcr6gene iscis-regulated and its expression is significantly correlated with CORT+DFP treatment. Its mean transcript abundance in PFC of BXD mice decreased 1.6-fold (p< 0.0001) in the CORT+DFP group. The response ofCcr6to CORT+DFP is also significantly different (p< 0.0001) between the parental strains, suggestingCcr6is affected by both host genetic background and chemical treatments. Pearson product-moment correlation analysis revealed 1473Ccr6-correlated genes (p< 0.05). Enrichment of these genes was seen in the immune, inflammation, cytokine, and neurological related categories. In addition, we also found five central nervous system-related phenotypes and fecal corticosterone concentration have significant correlation (p< 0.05) with expression ofCcr6in the PFC. We further established a protein-protein interaction subnetwork for theCcr6-correlated genes, which provides an insight on the interaction of G protein-coupled receptors, kallikrein-kinin system and neuroactive ligand-receptors. This analysis likely defines the heterogeneity and complexity of GWI. Therefore, our results suggest thatCcr6is one of promising GWI biomarkers.

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