title: Evidence for human leukocyte antigen-related susceptibility in idiopathic childhood ischemic stroke.
abstract: Stroke in children is a relatively uncommon condition and frequently associated with other diseases like cardiopathies, sickle cell disease and chronic smoking. In contrast to stroke in adults, it is rarely caused by atherosclerosis, hypertension or diabetes mellitus. Childhood stroke of unknown causes is called idiopathic stroke. The etiology of idiopathic stroke is unknown. However, several so-called idiopathic diseases develop on the basis of a genetic predisposition. As an approach to investigate this possibility in idiopathic childhood ischemic stroke, we studied the relationship between clinical and immunogenetic features in this disease. We demonstrate that the gene frequencies and relative risk of HLA-B51 were markedly increased in our patients compared with controls (p < 0.001). Thirteen of seventeen HLA-B51-positive patients had had a preceding respiratory infection, which was a higher proportion than in the control group (p < 0.05). In the patient group, the alleles HLA-DRB1*0802, -DRAI*0401 and -DQBI*0402 were also significantly increased, defining the haplotype DRB1*0802-DRA1*0401-DQB1*0402 as a high-risk haplotype for idiopathic childhood ischemic stroke. Transient viral or bacterial infections, which involve vasculitis and vascular occlusion in the brain, can trigger idiopathic childhood ischemic stroke on the basis of an genetic predisposition.
authors.affiliation: Division of Neurology, Department of Internal Medicine, Beijing Children's Hospital, The Capital University of Medical Sciences, Beijing, China. zouliping21@hotmail.com
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Zou
authors.forename: Yu-Hong
authors.initials: YH
authors.lastname: Guo
authors.forename: Fang
authors.initials: F
authors.lastname: Fang
authors.forename: Hong
authors.initials: H
authors.lastname: Jin
authors.forename: Hu-Sheng
authors.initials: HS
authors.lastname: Wu
authors.forename: Eilhard
authors.initials: E
authors.lastname: Mix
mesh_terms: D002648:Child; D002675:Child, Preschool; D002681:China; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D015234:HLA-A Antigens / Q000235:genetics; D015235:HLA-B Antigens / Q000235:genetics; D006683:HLA-DQ Antigens / Q000235:genetics; D059848:HLA-DQ alpha-Chains; D059866:HLA-DQ beta-Chains; D006684:HLA-DR Antigens / Q000235:genetics; D059811:HLA-DRB1 Chains; D015395:Histocompatibility Antigens Class I / Q000235:genetics*; D000949:Histocompatibility Antigens Class II / Q000235:genetics*; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D012141:Respiratory Tract Infections / Q000150:complications / Q000235:genetics / Q000276:immunology; D020521:Stroke / Q000235:genetics* / Q000276:immunology / Q000473:pathology; D014057:Tomography, X-Ray Computed
chemical_list: D015234:HLA-A Antigens; D015235:HLA-B Antigens; D006683:HLA-DQ Antigens; D059848:HLA-DQ alpha-Chains; D059866:HLA-DQ beta-Chains; C069050:HLA-DQA1 antigen; C069051:HLA-DQB1 antigen; D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II