Two-Dimensional Linkage Analyses of Rheumatoid Arthritis
Author Information
Author(s): Mukhopadhyay Nandita, Halder Indrani, Bhattacharjee Samsiddhi, Weeks Daniel E
Primary Institution: University of Pittsburgh
Hypothesis
Can gene × gene interactions influencing rheumatoid arthritis be identified through a two-stage linkage analysis procedure?
Conclusion
The study found evidence of interacting loci on chromosomes 5, 6, and 18 that influence rheumatoid arthritis.
Supporting Evidence
- Linkage analyses identified regions on chromosomes 3, 5, 6, 8, 16, 18, 19, and 20.
- Evidence of interacting loci was found on chromosomes 5, 6, and 18.
- The study utilized a two-dimensional genome scan to detect gene × gene interactions.
Takeaway
Researchers looked at how different genes work together to affect rheumatoid arthritis and found some important interactions.
Methodology
The study used a two-stage linkage analysis procedure, first identifying regions of interest through one-dimensional linkage analyses and then analyzing selected regions for gene × gene interactions using a two-dimensional genome scan.
Potential Biases
The analysis may be affected by the high concordance of traits among family members, which could limit the power to detect linkage.
Limitations
The study faced challenges in detecting interactions due to the complexity of the data and the potential for high false-positive rates.
Participant Demographics
The data consisted of 472 multiplex pedigrees with 1164 genotyped individuals, primarily affected by rheumatoid arthritis.
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