SUMO4 M55V polymorphism affects susceptibility to type I diabetes in HLA DR3- and DR4-positive Swedish patients

• SUMO4 M55V, located in IDDM5, has been a focus for debate because of its association to type I diabetes (TIDM) in Asians but not in Caucasians. The current study aims to test the significance of M55V association to TIDM in a large cohort of Swedish Caucasians, and to test whether M55V is associated in those carrying human leukocyte antigen (HLA) class II molecules. A total of 673 TIDM patients and 535 age- and sex-matched healthy controls were included in the study. PCR-RFLP was performed to identify the genotype and allele variations. Our data suggest that SUMO4 M55V is not associated with susceptibility to TIDM by itself. When we stratified our patients and controls based on heterozygosity for HLA-DR3/DR4 and SUMO4 genotypes, we found that presence of SUMO4 GG increased further the relative risk conferred by HLA-DR3/DR4 to TIDM, whereas SUMO4 AA decreased the risk. From the current study, we conclude that SUMO4 M55V is associated with TIDM in association with high-risk HLA-DR3 and DR4, but not by itself.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine (hsv//eng)

Nyckelord

Adolescent

Adult

Alleles

Case-Control Studies

Child

Child

Preschool

Cohort Studies

Diabetes Mellitus

Type 1/*genetics/immunology

Female

Genetic Predisposition to Disease

Genotype

HLA-DR3 Antigen/*genetics/immunology

HLA-DR4 Antigen/*genetics/immunology

Haplotypes

Humans

Infant

Infant

Newborn

Male

Polymorphism

Single Nucleotide

Small Ubiquitin-Related Modifier Proteins/*genetics/immunology

Sweden

Adolescent

MEDICINE

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)