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Polymorphisms and linkage analysis for ICAM-1 and the selectin gene cluster
D K Vora1, C L Rosenbloom, A L Beaudet
1Institute of Molecular Genetics, Baylor College of Medicine, Houston, Texas 77030.
Genomics
|June 1, 1994
Summary
Genetic variations in cell adhesion molecules like ICAM-1 and selectins may influence inflammatory disease susceptibility. Researchers identified specific polymorphisms in these genes, providing insights into disease risk factors.
Area of Science:
- Genetics
- Immunology
- Molecular Biology
Background:
- Leukocyte and endothelial cell adhesion molecules play roles in inflammatory processes.
- Genetic polymorphisms in these molecules could affect susceptibility to multifactorial diseases.
Purpose of the Study:
- To identify polymorphisms in intercellular adhesion molecule-1 (ICAM-1) and the selectin gene cluster (P-selectin, L-selectin, E-selectin).
- To investigate the linkage of these genes within the human genome.
Main Methods:
- Screening for amino acid and dinucleotide repeat polymorphisms in ICAM-1.
- Identifying restriction fragment length polymorphisms (RFLPs) in E-selectin, P-selectin, and L-selectin using cDNA probes.
- Performing linkage analysis using CEPH families.
Main Results:
- Two ICAM-1 amino acid polymorphisms (codon 241 and 469) and dinucleotide repeat polymorphisms were found.
- Dinucleotide repeat polymorphisms were identified in P-selectin.
- Linkage analysis confirmed ICAM-1 is on chromosome 19 (near LDL receptor) and the selectin cluster is on chromosome 1q23.
Conclusions:
- Specific genetic polymorphisms in ICAM-1 and selectins have been identified.
- These findings contribute to understanding genetic factors in inflammatory diseases.
- The chromosomal locations of ICAM-1 and the selectin gene cluster were confirmed.