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Autism Studies and Related Medical Conditions, January 2009 - TACA

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Department of Psychiatry, Indiana University School of Medicine, 1111 W. 10th<br />

Street, Indianapolis, IN 46202-4800, USA.<br />

BACKGROUND: Neuroimmune regulation abnormalities have been implicated in<br />

the pathophysiology of autistic disorder. Nitric oxide (NO) is involved in immune<br />

reactivity <strong>and</strong> is known to affect brain neurodevelopmental processes. Recent<br />

evidence indicates that NO, <strong>and</strong> cytokines involved in NO production, may be<br />

high in children with autism. The purpose of this study was to verify that plasma<br />

NO is high in children with autism <strong>and</strong> determine whether this elevation is<br />

related to plasma levels of cytokines involved in NO production. METHODS: The<br />

metabolites of NO, nitrite, <strong>and</strong> nitrate (NOx), along with the cytokines interferongamma<br />

(IFN-gamma), tumor necrosis factor-alpha, <strong>and</strong> interleukin-1beta, were<br />

measured in plasma of 29 children with autism (mean age +/- SD = 6.1 +/- 2.8<br />

years) <strong>and</strong> 27 age- <strong>and</strong> gender-matched healthy comparison subjects using<br />

commercially available assay kits. RESULTS: Plasma levels of NOx were<br />

significantly higher in the autistic subjects (p =.006); plasma levels of the<br />

cytokines did not differ between groups. NOx <strong>and</strong> IFN-gamma levels were<br />

positively correlated in the autistic subjects (r =.51; p =.005). CONCLUSIONS:<br />

These results confirm that plasma NO is high in some children with autism <strong>and</strong><br />

suggest that this elevation may be related to IFN-gamma activity.<br />

PMID: 14960298 [PubMed - indexed for MEDLINE]<br />

Swisher CN, Swisher L. Letter: Congenital rubella <strong>and</strong> autistic behavior. N Engl J Med.<br />

1975 Jul 24;293(4):198.<br />

Swisher CN, Swisher L.<br />

PMID: 1134536 [PubMed - indexed for MEDLINE]<br />

Todd RD, Hickok JM, Anderson GM, Cohen DJ. Antibrain antibodies in infantile autism.<br />

Biol Psychiatry. 1988 Mar 15;23(6):644-7.<br />

Todd RD, Hickok JM, Anderson GM, Cohen DJ.<br />

Department of Psychiatry, Washington University School of Medicine, St. Louis,<br />

MO 63110.<br />

PMID: 3355880 [PubMed - indexed for MEDLINE]<br />

<strong>Autism</strong> <strong>Studies</strong> & <strong>Related</strong> <strong>Medical</strong> <strong>Conditions</strong> – <strong>TACA</strong> © Page 263

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