title: The intercellular adhesion molecule-1 K469E polymorphism in type 1 diabetes.
abstract: Type 1 (insulin-dependent) diabetes is a complex trait. The region harboring the ICAM1 gene on 19p13 links to type 1 diabetes, and a growing body of evidence indicates that intercellular adhesion molecule-1 (ICAM-1) could play a role in type 1 diabetes development. Recently, association studies of an ICAM-1 K469E polymorphism in type 1 diabetes populations have reported conflicting results. Hence, we performed a transmission disequilibrium test analysis of the ICAM-1 K469E variations in 253 Danish type 1 diabetes families. Linkage and association was not found between the ICAM-1 K469E variation and type 1 diabetes in Danish patients (P(tdt)> or =0.48), and our data did not indicate an interaction between ICAM1 and IDDM1 in predisposition to type 1 diabetes in Danes (P=0.78). We did not observe significant association with late-onset type 1 diabetes (P(tdt)> or =0.12) or differences in transmission patterns between groups of affected offspring stratified for age at onset (P> or =0.19), as suggested in Japanese patients. Combined analysis of the present and previously reported transmission data comprising 728 affected offspring of Romanian, Finnish, and Danish ancestry suggested association between the ICAM-1 E469 allele and type 1 diabetes (P(tdt)=0.013), but association was not found in the combined Scandinavian material. In conclusion, we found no association of the ICAM-1 K469E polymorphism with type 1 diabetes or its subsets stratified for age at onset and HLA risk in Danish patients. Analysis of ICAM-1 K469E transmissions reported in three populations suggested association to type 1 diabetes, but also demonstrated heterogeneity between populations.
authors.affiliation: Steno Diabetes Center, Gentofte, Denmark.
authors.forename: O P
authors.initials: OP
authors.lastname: Kristiansen
authors.forename: R L
authors.initials: RL
authors.lastname: Nolsøe
authors.forename: H
authors.initials: H
authors.lastname: Holst
authors.forename: S
authors.initials: S
authors.lastname: Reker
authors.forename: Z M
authors.initials: ZM
authors.lastname: Larsen
authors.forename: J
authors.initials: J
authors.lastname: Johannesen
authors.forename: J
authors.initials: J
authors.lastname: Nerup
authors.forename: F
authors.initials: F
authors.lastname: Pociot
authors.forename: T
authors.initials: T
authors.lastname: Mandrup-Poulsen
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D003718:Denmark; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics*; D005060:Europe; D005260:Female; D006801:Humans; D007223:Infant; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D017354:Point Mutation; D011110:Polymorphism, Genetic
chemical_list: D018799:Intercellular Adhesion Molecule-1