Common Variants within MECP2 Confer Risk of Systemic Lupus Erythematosus
Author Information
Author(s): Sawalha Amr H., Webb Ryan, Han Shizhong, Kelly Jennifer A., Kaufman Kenneth M., Kimberly Robert P., Alarcón-Riquelme Marta E., James Judith A., Vyse Timothy J., Gilkeson Gary S., Choi Chan-Bum, Scofield R. Hal, Bae Sang-Cheol, Nath Swapan K., Harley John B.
Primary Institution: University of Oklahoma Health Sciences Center
Hypothesis
The study investigates the association of common variants in the MECP2 gene with the risk of developing systemic lupus erythematosus (SLE).
Conclusion
The study identifies significant associations between MECP2 gene variants and systemic lupus erythematosus in two independent cohorts.
Supporting Evidence
- Nine SNPs showed significant association with SLE in the Korean cohort.
- The strongest association was found with the SNP rs17435.
- Similar associations were replicated in a European-derived cohort.
- Three haplotypes were identified, with one being a risk haplotype.
- MECP2 is located on the X chromosome, which is relevant for the predominantly female SLE population.
- DNA methylation plays a critical role in the pathogenesis of SLE.
- MECP2 is involved in the regulation of methylation-sensitive genes.
- Findings suggest a genetic and epigenetic interaction in SLE pathogenesis.
Takeaway
This study found that certain changes in a gene called MECP2 are linked to a higher chance of getting lupus, a disease that affects many parts of the body.
Methodology
The study used a candidate gene association approach to genotype 21 SNPs in SLE patients and controls from two different populations.
Potential Biases
Potential bias due to population stratification was assessed and found to be minimal.
Limitations
The study primarily focused on female patients and may not generalize to male patients or other ethnic groups.
Participant Demographics
The study included 628 Korean female SLE patients and 736 healthy female controls, as well as 1080 European-derived SLE patients and controls.
Statistical Information
P-Value
0.0000018
Confidence Interval
1.31–1.90
Statistical Significance
p<0.0000018
Digital Object Identifier (DOI)
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