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5-HTTLPR variants not associated with autistic spectrum disorders.

N Zhong¹, L Ye, W Ju

¹Department of Human Genetics, New York State Institute for Basic Research, 1050 Forest Hill Road, Staten Island, NY 10314, USA. omrddzhong@aol.com

|February 7, 2001

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This study investigated the serotonin transporter (5-HTT) gene-linked polymorphic region (5-HTTLPR) and autism spectrum disorders. Findings show no association between 5-HTTLPR variants and autism susceptibility.

Area of Science:

Neurogenetics
Developmental disorders

Background:

Autism spectrum disorders (ASDs) are complex neurodevelopmental conditions.
The serotonin transporter gene (5-HTT) and its polymorphic region (5-HTTLPR) have been implicated in various neuropsychiatric disorders.

Purpose of the Study:

To investigate the association between 5-HTTLPR gene variants and autistic spectrum disorders.
To determine if 5-HTTLPR polymorphism influences susceptibility to ASDs.

Main Methods:

Genotyping analysis of the 5-HTTLPR locus.
Comparison of allele frequencies in autistic subjects, fragile X syndrome patients with autistic behavior, and control groups.

Main Results:

No significant differences were observed in the distribution frequency of the 5-HTTLPR long (L) and short (S) alleles between the studied groups.

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The study found no statistical association between 5-HTTLPR variants and autistic spectrum disorders.

Conclusions:

The polymorphic variants of the 5-HTTLPR gene are not supported as a susceptibility factor for autistic disorders.
Further research may be needed to explore other genetic or environmental factors contributing to ASDs.