Abstract
In the past two decades, there has been increasing interest in the potential contributions of immune activation and neural inflammation to the pathogenesis of seizures and epilepsies. Studies have focused on the contribution of antibody-mediated encephalitis as well as pro-inflammatory mediators produced by brain-resident glial cells to the pathogenesis of epilepsy and seizure induction. Immune activation that leads to functional rewiring of the brain can be both the cause and the consequence of seizures. The immune response, however, is a process tightly controlled by a system of checks and balances to prevent aberrant inflammatory damage. The role of regulatory immune cells that suppress overt immune activation has been largely unexplored in epileptogenesis and seizure control. In this review, we discuss experimental data generated in our laboratory to examine the role of regulatory immune cells in seizure modulation and epileptogenesis. Specifically, we focus on the emerging knowledge of CD4+FoxP3+ regulatory T cells (Tregs) in neurological disorders, recruitment of thymus-derived natural Tregs (tTregs) to the central nervous system (CNS), generation of peripherally derived antigen-specific Tregs (pTregs), Treg markers, and the immunosuppressive mechanisms of Tregs. We discuss the interaction between immune regulatory cells and inflammation-driven effector cells in the regulation of neural inflammation to suppress excessive immune responses deleterious to the host and maintenance of immune homeostasis.
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Abbreviations
- Ab::
-
antibody
- APC::
-
antigen-presenting cells
- BBB::
-
blood-brain barrier
- CD127::
-
IL-7 receptor alpha chain
- CNS::
-
central nervous system
- CSF::
-
cerebral spinal fluid
- CTL::
-
cytotoxic T lymphocyte
- CTLA-4::
-
cytotoxic T lymphocytes antigen-4
- DC::
-
dendritic cells
- FoxP3::
-
forkhead box P3
- FR4::
-
folate receptor 4
- GARP::
-
glycoprotein A repetitions predominant
- GFP::
-
green fluorescent protein
- GITR::
-
glucocorticoid-induced tumor necrosis factor receptor
- ICOS::
-
inducible co-stimulator
- IL-10::
-
interleukin-10
- IMP::
-
immune-modifying nanoparticle
- iTreg::
-
induced regulatory T cells
- IPEX::
-
immune dysregulation, polyendocrinopathy, enteropathy, and X-linked
- KA::
-
kainic acid
- LAG-3::
-
lymphocyte activation antigen-3
- LAP::
-
latency-associated peptide
- MHC::
-
major histocompatibility complex
- mTOR::
-
mammalian target of rapamycin
- NFAT::
-
nuclear factor of activated T cells
- NF-kB::
-
nuclear factor-kB
- NOD-Rag::
-
Non-obese diabetic–recombination activating gene
- PD-1::
-
programmed cell death-1
- PI3K::
-
phosphatidylinositol-3-kinase
- PLGA::
-
carboxylated poly(lactic-co-glycolic) acid
- PTEN::
-
phosphatase and tensin homolog
- pTregs::
-
peripherally derived regulatory T cells
- S1P1::
-
sphingosine phosphate receptor 1
- SCID::
-
severe combined immunodeficiency
- Tconv::
-
conventional T cells
- TCR::
-
T cell receptor
- Teff::
-
effector T cells
- TGF-β::
-
tumor necrosis factor-β
- Tr1::
-
type 1 regulatory T cells
- Tregs::
-
regulatory T cells
- tTregs::
-
thymus-derived regulatory T cells
- TSDR::
-
Treg-specific demethylation region
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Xu, D., Koh, S., Miller, S.D. (2021). Role of Regulatory T cells in Epilepsy. In: Janigro, D., Nehlig, A., Marchi, N. (eds) Inflammation and Epilepsy: New Vistas. Progress in Inflammation Research, vol 88. Springer, Cham. https://doi.org/10.1007/978-3-030-67403-8_9
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