PMID- 16698940 OWN - NLM STAT- MEDLINE DCOM- 20070913 LR - 20240312 IS - 0741-5400 (Print) IS - 0741-5400 (Linking) VI - 80 IP - 1 DP - 2006 Jul TI - The immune response in autism: a new frontier for autism research. PG - 1-15 AB - Autism spectrum disorders (ASD) are part of a broad spectrum of neurodevelopmental disorders known as pervasive developmental disorders, which occur in childhood. They are characterized by impairments in social interaction, verbal and nonverbal communication and the presence of restricted and repetitive stereotyped behaviors. At the present time, the etiology of ASD is largely unknown, but genetic, environmental, immunological, and neurological factors are thought to play a role in the development of ASD. Recently, increasing research has focused on the connections between the immune system and the nervous system, including its possible role in the development of ASD. These neuroimmune interactions begin early during embryogenesis and persist throughout an individual's lifetime, with successful neurodevelopment contingent upon a normal balanced immune response. Immune aberrations consistent with a dysregulated immune response, which so far, have been reported in autistic children, include abnormal or skewed T helper cell type 1 (T(H)1)/T(H)2 cytokine profiles, decreased lymphocyte numbers, decreased T cell mitogen response, and the imbalance of serum immunoglobulin levels. In addition, autism has been linked with autoimmunity and an association with immune-based genes including human leukocyte antigen (HLA)-DRB1 and complement C4 alleles described. There is potential that such aberrant immune activity during vulnerable and critical periods of neurodevelopment could participate in the generation of neurological dysfunction characteristic of ASD. This review will examine the status of the research linking the immune response with ASD. FAU - Ashwood, Paul AU - Ashwood P AD - Medical Microbiology and Immunology and the M.I.N.D. Institute, University of California Davis, Sacramento, CA 95817, USA. pashwood@ucdavis.edu FAU - Wills, Sharifia AU - Wills S FAU - Van de Water, Judy AU - Van de Water J LA - eng PT - Journal Article PT - Review DEP - 20060512 PL - England TA - J Leukoc Biol JT - Journal of leukocyte biology JID - 8405628 RN - 0 (Complement C4) RN - 0 (HLA-DR Antigens) RN - 0 (HLA-DRB1 Chains) SB - IM MH - Animals MH - Autistic Disorder/genetics/*immunology MH - Autoimmunity MH - Complement C4/genetics MH - HLA-DR Antigens/genetics MH - HLA-DRB1 Chains MH - Humans MH - T-Lymphocytes, Helper-Inducer/immunology RF - 199 EDAT- 2006/05/16 09:00 MHDA- 2007/09/14 09:00 CRDT- 2006/05/16 09:00 PHST- 2006/05/16 09:00 [pubmed] PHST- 2007/09/14 09:00 [medline] PHST- 2006/05/16 09:00 [entrez] AID - jlb.1205707 [pii] AID - 10.1189/jlb.1205707 [doi] PST - ppublish SO - J Leukoc Biol. 2006 Jul;80(1):1-15. doi: 10.1189/jlb.1205707. Epub 2006 May 12.