Gene Expression Profiles in Autoimmune Diseases from Twin Studies
Author Information
Author(s): O'Hanlon Terrance P, Rider Lisa G, Gan Lu, Fannin Rick, Paules Richard S, Umbach David M, Weinberg Clarice R, Shah Ruchir R, Mav Deepak, Gourley Mark F, Miller Frederick W
Primary Institution: National Institute of Environmental Health Sciences, National Institutes of Health
Hypothesis
Do multiple systemic autoimmune diseases share gene expression pathways that could provide insights into common pathogenic mechanisms?
Conclusion
Gene expression profiles suggest that unaffected twins may be in a transitional state of immune dysregulation, potentially predisposing them to systemic autoimmune diseases.
Supporting Evidence
- 104 probes corresponding to 92 identifiable genes showed significant differences in gene expression between probands and unrelated controls.
- Intermediate gene expression levels were observed in unaffected twins compared to probands and unrelated controls.
- Gene expression profiles suggest common pathways involved in immune response and signaling among systemic autoimmune diseases.
Takeaway
The study looked at twins to see if they share similar gene patterns when one has an autoimmune disease and the other doesn't, finding that the healthy twins might be at risk for developing the disease.
Methodology
RNA microarray analyses were used to quantify gene expression in peripheral blood cells from 20 monozygotic twin pairs discordant for systemic autoimmune diseases.
Potential Biases
Potential confounding factors related to genetic polymorphisms and environmental exposures.
Limitations
Small sample sizes and limited statistical power due to challenges in recruiting qualified monozygotic twins discordant for systemic autoimmune diseases.
Participant Demographics
19 non-Hispanic Caucasian twin pairs and 1 Hispanic twin pair, with ages ranging from 3 to 43 years.
Statistical Information
P-Value
< 0.1
Statistical Significance
p<0.1
Digital Object Identifier (DOI)
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