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Is fever suppression involved in the etiology of autism and neurodevelopmental disorders?Torres ARBMC Pediatr 2003[Sep]; 3 (ä): 9BACKGROUND: There appears to be a significant increase in the prevalence rate of autism. Reasons for the increase are unknown, however, there is a substantial body of evidence that suggests the etiology involves infections of the pregnant mother or of a young child. Most infections result in fever that is routinely controlled with antipyretics such as acetaminophen. The blocking of fever inhibits processes that evolved over millions of years to protect against microbial attack. Immune mechanisms in the central nervous system are part of this protective process. HYPOTHESIS: The blockage of fever with antipyretics interferes with normal immunological development in the brain leading to neurodevelopmental disorders such as autism in certain genetically and immunologically disposed individuals. TESTING THE HYPOTHESIS: Epidemiological studies to determine associations between the use of antipyretics and neurodevelopmental disorders should be undertaken. Biochemical tests will involve the examination of fluids/serum by mass spectrometry and the determination of cytokine/chemokine levels in serum and cell culture fluids after stimulation with fever-inducing molecules from bacteria, viruses and yeast. Postmortem brain can be examined by immunohistochemistry or other methods such as fluorescent in situ hybridization (FISH) to determine altered expression levels of chemokines/cytokines and other molecules. IMPLICATIONS OF THE HYPOTHESIS: 1) The use of antipyretics during pregnancy or in young children may be reserved for more severe fevers. 2) The perplexing genetic findings in autism may be better understood by categorizing genes along functional pathways. 3) New treatments based on immune, cell, pharmacological or even heat therapies may be developed.|Analgesics, Non-Narcotic/*adverse effects[MESH]|Autistic Disorder/genetics/*immunology[MESH]|Brain/*immunology[MESH]|Child[MESH]|Child Development Disorders, Pervasive/genetics/*immunology[MESH]|Disease Susceptibility[MESH]|Female[MESH]|Fever/*drug therapy/immunology[MESH]|Humans[MESH]|Pregnancy[MESH] |
