Prednisone Reprograms the Transcriptional Immune Cell Landscape in CNS Autoimmune Disease
He Li1, Yuehan Gao1, Lihui Xie1
1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
Abstract:
Glucocorticoids (GCs) are widely used immunosuppressive drugs for autoimmune diseases, although considerable gaps exist between current knowledge of the mechanisms of GCs and their conclusive immune-regulatory effects. Here we generated a single-cell transcriptional immune cell atlas based on prednisone-treated or untreated experimental autoimmune uveitis (EAU) mice. Immune cells were globally activated in EAU, and prednisone partially reversed this effect in terms of cell composition, gene expression, transcription factor regulation, and cell-cell communication. Prednisone exerted considerable rescue effects on T and B cells and increased the proportion of neutrophils. Besides commonly regulated transcriptional factors (Fosb, Jun, Jund), several genes were only regulated in certain cell types (e.g. Cxcr4 and Bhlhe40 in T cells), suggesting cell-type-dependent immunosuppressive properties of GC. These findings provide new insights into the mechanisms behind the properties and cell-specific effects of GCs and can potentially benefit immunoregulatory therapy development.
Insights
Prednisone, a glucocorticoid, partially reverses immune cell activation in autoimmune uveitis. This study reveals cell-specific effects of prednisone on immune cells, offering insights for developing better immunoregulatory therapies.
Area of Science:
- Immunology
- Pharmacology
- Genomics
Background:
- Glucocorticoids (GCs) are crucial immunosuppressants for autoimmune diseases.
- The precise mechanisms and immune-regulatory effects of GCs remain incompletely understood.
- Experimental autoimmune uveitis (EAU) serves as a model for studying autoimmune inflammation.
Purpose of the Study:
- To elucidate the cell-specific mechanisms of glucocorticoid action in autoimmune diseases.
- To characterize the immune cell landscape during EAU and the impact of prednisone treatment.
- To identify novel therapeutic targets for immunoregulatory treatments.
Main Methods:
- Generation of a single-cell transcriptional immune cell atlas from prednisone-treated and untreated EAU mice.
- Analysis of immune cell composition, gene expression, and transcription factor regulation.
- Assessment of cell-cell communication networks.
Main Results:
- Prednisone partially reversed global immune cell activation observed in EAU.
- Significant rescue effects of prednisone were noted in T and B cells, with increased neutrophil proportions.
- Cell-type-specific gene regulation by prednisone (e.g., Cxcr4, Bhlhe40 in T cells) was identified, highlighting context-dependent immunosuppression.
Conclusions:
- Prednisone modulates immune cell populations and gene expression in a cell-specific manner during EAU.
- These findings provide novel insights into glucocorticoid mechanisms and cell-specific effects.
- The study supports the potential for developing targeted immunoregulatory therapies based on these mechanisms.
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