Abstract
Multiple sclerosis (MS) is a chronic, autoimmune, demyelinating disease of the central nervous system (CNS) that leads to axonal damage and accumulation of disability. Relapsing-remitting MS (RR-MS) is the most frequent presentation of MS and this form of MS is three times more prevalent in females than in males. This female bias in MS is apparent only after puberty, suggesting a role for sex hormones in this regulation; however, very little is known of the biological mechanisms that underpin the sex difference in MS onset. Experimental autoimmune encephalomyelitis (EAE) is an animal model of RR-MS that presents more severely in females in certain mouse strains and thus has been useful to study sex differences in CNS autoimmunity. Here, we overview the immunopathogenesis of MS and EAE and how immune mechanisms in these diseases differ between a male and female. We further describe how females exhibit more robust myelin-specific T helper (Th) 1 immunity in MS and EAE and how this sex bias in Th cells is conveyed by sex hormone effects on the T cells, antigen presenting cells, regulatory T cells, and innate lymphoid cell populations.
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Abbreviations
- Aire:
-
Autoimmune regulator
- APC:
-
Antigen presenting cell
- BBB:
-
Blood-brain barrier
- cDC:
-
Classical dendritic cell
- CFA:
-
Complete Freund’s adjuvant
- CNS:
-
Central nervous system
- CSF:
-
Cerebrospinal fluid
- DC:
-
Dendritic cell
- DC1:
-
Type 1 classical dendritic cell
- DC2:
-
Type 2 classical dendritic cell
- E2:
-
17-beta-estradiol
- EAE:
-
Experimental autoimmune encephalomyelitis
- Gd:
-
Gadolinium
- GM-CSF:
-
Granulocyte-macrophage colony-stimulating factor
- GWAS:
-
Genome-wide susceptibility study
- IFN:
-
Interferon
- Ig:
-
Immunoglobulin
- IL:
-
Interleukin
- ILC2:
-
Type 2 innate lymphoid cell
- LPS:
-
Lipopolysaccharide
- MBP:
-
Myelin basic protein
- MHC:
-
Major histocompatibility complex
- MHC-II:
-
Major histocompatibility complex class II
- MMP:
-
Matrix metalloproteinase
- MOG:
-
Myelin oligodendrocyte glycoprotein
- MRI:
-
Magnetic resonance imaging
- MS:
-
Multiple sclerosis
- NK:
-
Natural killer cell
- NKT:
-
Natural killer T cell
- PLP:
-
Myelin proteolipid protein
- PPAR:
-
Peroxisome proliferator-activated receptor
- PP-MS:
-
Primary progressive multiple sclerosis
- PTX:
-
Pertussis toxin
- RR-MS:
-
Relapsing-remitting multiple sclerosis
- S1PR:
-
Sphingosine-1-phosphate receptor
- SP-MS:
-
Secondary progressive multiple sclerosis
- TCR:
-
T cell receptor
- TEC:
-
Thymic epithelial cell
- Th:
-
T helperspiepr146 cell
- TLR:
-
Toll-like receptor
- TMEV:
-
Theiler’s murine encephalomyelitis virus
- TNF:
-
Tumour necrosis factor
- Tr1:
-
Type I regulatory cell
- Treg:
-
T regulatory cell
- TSPO-PET:
-
18-kDa translocator protein positron emission tomography
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Alvarez-Sanchez, N., Dunn, S.E. (2022). Immune Cell Contributors to the Female Sex Bias in Multiple Sclerosis and Experimental Autoimmune Encephalomyelitis. In: Gibson, C., Galea, L.A.M. (eds) Sex Differences in Brain Function and Dysfunction. Current Topics in Behavioral Neurosciences, vol 62. Springer, Cham. https://doi.org/10.1007/7854_2022_324
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