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Erythrocyte Sedimentation Rate: A Physics-Driven Characterization in a Medical Context
Published on: March 24, 2023
Complement receptor 1 gene variants are associated with erythrocyte sedimentation rate
Iftikhar J Kullo1, Keyue Ding, Khader Shameer
1Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905, USA. kullo.iftikhar@mayo.edu
American Journal of Human Genetics
|June 25, 2011
Summary
Genetic variations in the complement receptor 1 (CR1) gene significantly influence erythrocyte sedimentation rate (ESR), a key indicator of inflammation. This discovery links innate immunity pathways to red blood cell behavior.
Area of Science:
- Genetics
- Immunology
- Hematology
Background:
- The erythrocyte sedimentation rate (ESR) is a common measure of the acute phase response, but its molecular basis remains unclear.
- Understanding the genetic factors influencing ESR can provide insights into inflammatory processes and erythrocyte behavior.
Purpose of the Study:
- To identify genetic variants associated with erythrocyte sedimentation rate (ESR).
- To investigate the role of the complement receptor 1 (CR1) gene in ESR variation.
Main Methods:
- A genome-wide association study (GWAS) was conducted on 7607 patients from the Electronic Medical Records and Genomics (eMERGE) network.
- Discovery and replication cohorts were utilized to validate findings, including a nonsynonymous single nucleotide polymorphism (SNP) in the CR1 gene (rs6691117).
Main Results:
- A significant association was found between a nonsynonymous SNP in the CR1 gene (rs6691117, Val→IIe) and ESR (combined cohort p = 9 × 10(-24)).
- Another CR1 SNP (rs2274567, His→Arg), in linkage disequilibrium with rs6691117, also showed a strong association with ESR (combined cohort p = 2 × 10(-25)).
- These associated CR1 variants are located near the C3b/C4b binding site, suggesting a functional mechanism.
Conclusions:
- Genetic variation within the CR1 gene significantly contributes to interindividual differences in ESR.
- This finding highlights a connection between the innate immune system, specifically complement-mediated clearance, and erythrocyte sedimentation dynamics.
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