title: Genetic variants in the mannose receptor gene (MRC1) are associated with asthma in two independent populations.
abstract: Mannose receptor is a member of the C-type lectin receptor family involved in pathogen molecular pattern recognition and thought to be critical in shaping host immune responses and maintaining homeostasis. The aim of this study was to investigate potential associations of genetic variants in the MRC1 gene with asthma in two independent populations. Seven single-nucleotide polymorphisms (SNPs; rs2477637, rs2253120, rs2477631, rs2477664, rs692527, rs1926736, and rs691005) in the MRC1 gene locus were genotyped and evaluated regarding association with asthma in 870 unrelated Japanese subjects (446 asthmatics, 424 controls). The same markers were validated in 176 unrelated African-American subjects (86 asthmatics, 90 controls). Suggestive evidence of association between five SNPs (rs2477637, rs2253120, rs2477664, rs692527, and rs1926736) and asthma was observed in the analysis of the Japanese population independent of sex, age, smoking status, and atopic status. SNPs rs692527 and rs691005 showed significant association with asthma in the African-American population. Haplotypes containing two linked SNPs (rs692527 and rs1926736) were significantly associated with asthma in both Japanese and African-American populations. Our results suggest that sequence variations in the MRC1 gene are associated with the development of asthma in two independent and ethnically diverse populations.
authors.affiliation: First Department of Medicine, Hokkaido University School of Medicine, Kita-15 Nishi-7 Kita-Ku, Sapporo 060-8638, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Hattori
authors.forename: Satoshi
authors.initials: S
authors.lastname: Konno
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Hizawa
authors.forename: Akira
authors.initials: A
authors.lastname: Isada
authors.forename: Ayumu
authors.initials: A
authors.lastname: Takahashi
authors.forename: Kaoruko
authors.initials: K
authors.lastname: Shimizu
authors.forename: Kenichi
authors.initials: K
authors.lastname: Shimizu
authors.forename: Peisong
authors.initials: P
authors.lastname: Gao
authors.forename: Terri H
authors.initials: TH
authors.lastname: Beaty
authors.forename: Kathleen C
authors.initials: KC
authors.lastname: Barnes
authors.forename: Shau-Ku
authors.initials: SK
authors.lastname: Huang
authors.forename: Masaharu
authors.initials: M
authors.lastname: Nishimura
mesh_terms: D000293:Adolescent; D000328:Adult; D001741:Black or African American / Q000235:genetics; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D044466:Asian People / Q000235:genetics; D001249:Asthma / Q000208:ethnology / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D014644:Genetic Variation; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D007564:Japan; D037181:Lectins, C-Type / Q000235:genetics*; D015810:Linkage Disequilibrium; D016015:Logistic Models; D008297:Male; D000090323:Mannose Receptor; D037241:Mannose-Binding Lectins / Q000235:genetics*; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D011956:Receptors, Cell Surface / Q000235:genetics*; D055815:Young Adult
chemical_list: D037181:Lectins, C-Type; D000090323:Mannose Receptor; D037241:Mannose-Binding Lectins; D011956:Receptors, Cell Surface