title: Immunogenetic studies in autism and related disorders.
abstract: The major histocompatibility complex comprises a number of genes that control the function and regulation of the immune system. One of these genes, the C4B gene, encodes a product that is involved in eliminating pathogens such as viruses and bacteria from the body. We previously reported that a deficient form of the C4B gene, termed the C4B null allele (no C4B protein produced) had an increased frequently in autism. In this study we attempted to confirm the increased incidence of the C4B null allele in autism and investigated the presence of a C4B null allele in two other childhood disorders, attention-deficit hyperactivity disorder and dyslexia (reading disability). In addition, we explored the relationship of autism to the DR beta 1 gene, a gene located close to the C4B in autism. We confirmed the finding of an increased frequency of the C4B null allele in autism and found that the related disorders also had an increased frequency of this null allele. In addition, two alleles of the DR beta 1 gene also had significantly increased representation in the autistic subjects.
authors.affiliation: Utah State University, Logan 84322, USA.
authors.forename: R P
authors.initials: RP
authors.lastname: Warren
authors.forename: V K
authors.initials: VK
authors.lastname: Singh
authors.forename: R E
authors.initials: RE
authors.lastname: Averett
authors.forename: J D
authors.initials: JD
authors.lastname: Odell
authors.forename: A
authors.initials: A
authors.lastname: Maciulis
authors.forename: R A
authors.initials: RA
authors.lastname: Burger
authors.forename: W W
authors.initials: WW
authors.lastname: Daniels
authors.forename: W L
authors.initials: WL
authors.lastname: Warren
mesh_terms: D000595:Amino Acid Sequence; D001289:Attention Deficit Disorder with Hyperactivity / Q000235:genetics / Q000276:immunology; D001321:Autistic Disorder / Q000235:genetics* / Q000276:immunology*; D002874:Chromosome Mapping; D002896:Chromosomes, Human, Pair 6; D015935:Complement C4b / Q000235:genetics*; D006684:HLA-DR Antigens / Q000737:chemistry / Q000235:genetics; D059811:HLA-DRB1 Chains; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics / Q000276:immunology; D007859:Learning Disabilities / Q000235:genetics / Q000276:immunology; D008285:Major Histocompatibility Complex; D008969:Molecular Sequence Data
chemical_list: D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; D015935:Complement C4b