ABH Gene Polymorphisms and Cystic Fibrosis Lung Disease Severity
Author Information
Author(s): Jennifer L. Taylor-Cousar, Maimoona A. Zariwala, Lauranell H. Burch, Rhonda G. Pace, Mitchell L. Drumm, Hollin Calloway, Haiying Fan, Brent W. Weston, Fred A. Wright, Michael R. Knowles
Primary Institution: University of New Mexico Health Sciences Center
Hypothesis
Genetically determined ABO histo-blood group antigen differences may lead to differences in microbial binding by airway mucus, predisposing to early lung infection and more severe lung disease in cystic fibrosis patients.
Conclusion
Polymorphisms in the genes encoding ABO blood type, secretor, or Lewis genotypes were not associated with the severity of cystic fibrosis lung disease or the age of onset of Pseudomonas aeruginosa infection.
Supporting Evidence
- ABO genotype was determined for 778 patients, showing no significant difference in blood type distribution between mild and severe patients.
- FUT2 and FUT3 genotypes were analyzed, with no significant associations found with lung disease severity.
- Multivariate analyses showed no significant differences based on ABH type for other clinical phenotypes.
Takeaway
The study looked at whether blood type affects how bad lung disease gets in cystic fibrosis, but it found that blood type doesn't really make a difference.
Methodology
The study involved collecting clinical information and DNA from over 800 cystic fibrosis patients, genotyping for ABO, FUT2, and FUT3 alleles, and analyzing associations with lung disease severity and Pseudomonas aeruginosa infection.
Potential Biases
Loss of some patients from the original cohort could influence the results, but the overall mortality in the cohort was low.
Limitations
The study relied on retrospective data for Pseudomonas aeruginosa acquisition and did not have prospective culture data, which may limit the findings.
Participant Demographics
Patients were cystic fibrosis homozygous for the ΔF508 mutation, with a mean age of 28.6 years in the mild group and 16.2 years in the severe group.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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