Abstract
Autoimmune diseases appear to have multiple contributing factors including genetics, epigenetics, environmental factors, and aging. The predominance of females among patients with autoimmune diseases suggests possible involvement of the X chromosome and X chromosome inactivation. X chromosome inactivation is an epigenetic event resulting in multiple levels of control for modulation of the expression of X-linked genes in normal female cells such that there remains only one active X chromosome in the cell. The extent of this control is unique among the chromosomes and has the potential for problems when regulation is disrupted. Here we discuss the X chromosome inactivation process and how the X chromosome and X chromosome inactivation may be involved in development of autoimmune disorders.
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Abbreviations
- dcSAM:
-
Decarboxylated S-adenosylmethionine
- EBV:
-
Epstein–Barr virus
- LINE:
-
Long interspersed nuclear element
- MS:
-
Multiple sclerosis
- PAD:
-
Peptidyl arginine deiminase
- PAR1, PAR2:
-
Pseudo-autosomal regions of the X chromosome
- SAF:
-
Scaffold attachment factor
- SAM:
-
S-adenosylmethionine, the cellular methyl group donor
- SAMDC:
-
SAM decarboxylase, a key, initial enzyme in polyamine synthesis
- SAT1:
-
Spermidine/spermine-N1-acetyltransferase, an enzyme in polyamine recycling
- SMS:
-
Spermine synthase, an enzyme in polyamine synthesis
- TSIX:
-
An anti-sense gene to the XIST gene, involved in initiation of XCI
- Xa:
-
The active X chromosome
- XAR:
-
X-added region
- XCI:
-
X chromosome inactivation, epigenetic silencing of X chromosomes
- XCR:
-
X-conserved region
- Xi:
-
The inactive X chromosome
- XIC:
-
X-inactivation center, locus of genes involved in initiating XCI
- XIST:
-
X-inactivation specific transcript, a key gene in initiating XCI
- X-CGD:
-
X-linked chronic granulomatous disease
- Xp:
-
X chromosome short arm
- Xq:
-
X chromosome long arm
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Acknowledgements
The author would like to thank Dr. Yves Renaudineau (University of Brest, Brest, France) for his kind advice in the preparation of this manuscript. The author would also like to thank Dr. Thomas Yang (University of Florida, Gainesville, Florida, USA) for providing the cell lines and facilities used in preparing Fig. 2. The author would also like to thank Dr. Missag Parseghian (Peregrine Pharmaceuticals, Inc., Tustin, California, USA) for providing the anti-histone H1 antibodies used in Fig. 2.
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This work is supported by the NIH (P30-CA76292-11; SP01CA118210; W81XWH-08-2-0101; CA067771-14) through funding awarded to H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612-9416 USA
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Brooks, W.H. X Chromosome Inactivation and Autoimmunity. Clinic Rev Allerg Immunol 39, 20–29 (2010). https://doi.org/10.1007/s12016-009-8167-5
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DOI: https://doi.org/10.1007/s12016-009-8167-5