Back to Search
Start Over
CX3CR1 modulates SLE-associated glomerulonephritis and cardiovascular disease in MRL/lpr mice.
- Source :
-
Inflammation Research . May2023, Vol. 72 Issue 5, p1083-1097. 15p. - Publication Year :
- 2023
-
Abstract
- Objective: Patients with systemic lupus erythematosus (SLE) often develop multi-organ damages including heart and kidney complications. We sought to better define the underlying mechanisms with a focus on the chemokine receptor CX3CR1. Methods: We generated Cx3cr1-deficient MRL/lpr lupus-prone mice through backcrossing. We then employed heterozygous intercross to generate MRL/lpr littermates that were either sufficient or deficient of CX3CR1. The mice were also treated with either Lactobacillus spp. or a high-fat diet (HFD) followed by assessments of the kidney and heart, respectively. Results: Cx3cr1–/– MRL/lpr mice exhibited a distinct phenotype of exacerbated glomerulonephritis compared to Cx3cr1+/+ littermates, which was associated with a decrease of spleen tolerogenic marginal zone macrophages and an increase of double-negative T cells. Interestingly, upon correction of the gut microbiota with Lactobacillus administration, the phenotype of exacerbated glomerulonephritis was reversed, suggesting that CX3CR1 controls glomerulonephritis in MRL/lpr mice through a gut microbiota-dependent mechanism. Upon treatment with HFD, Cx3cr1–/– MRL/lpr mice developed significantly more atherosclerotic plaques that were promoted by Ly6C+ monocytes. Activated monocytes expressed ICOS-L that interacted with ICOS-expressing follicular T-helper cells, which in turn facilitated a germinal center reaction to produce more autoantibodies. Through a positive feedback mechanism, the increased circulatory autoantibodies further promoted the activation of Ly6C+ monocytes and their display of ICOS-L. Conclusions: We uncovered novel, Cx3cr1 deficiency-mediated pathogenic mechanisms contributing to SLE-associated glomerulonephritis and cardiovascular disease. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10233830
- Volume :
- 72
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Inflammation Research
- Publication Type :
- Academic Journal
- Accession number :
- 163829090
- Full Text :
- https://doi.org/10.1007/s00011-023-01731-1