Several studies have found genetic association between the SLC6A4 gene and autism in AGRE, CPEA, French-Caucasian, Portuguese and several mixed US population cohorts. However, several other studies found no genetic association between the SLC6A4 gene and autism in AGRE, SARC, US and Chinese Han population cohorts. Separately, genetic association has been found between the SLC6A4 gene and pervasive developmental disorder (PDD) in a Dutch population cohort. In addition, rare mutations in the SLC6A4 gene have been identified in individuals with ASD (Neale et al., 2012).
Molecular Function
The encoded protein has serotonin transporter activity, serotonin:sodium symport er activity.
External Links
References
Type
Title
Type of Disorder
Associated Disorders
Author, Year
Primary
Evidence of linkage between the serotonin transporter and autistic disorder.
The serotonin reuptake transporter modulates mitochondrial copy number and mitochondrial respiratory complex gene expression in the frontal cortex and cerebellum in a sexually dimorphic manner
76 children with high-functioning autism (HFA, IQ>80), 78 siblings, and 99 controls (all of Caucasian descent) collected in Dept. of Child and Adolescent Psychiatry at Univ. of Zurich
The serotonin transporter (SERT) knockout rat model was generated by N-ethyl-N-nitrosurea (ENU)-driven target-selected mutagenesis. Neurochemical changes in the homozygous SERT knockout rat are primarily limited to the serotonergic system, making this novel rat model potentially very useful for studying the behavioral and neurobiological consequences of disturbed 5-HT homeostasis. A multifactorial model of the SERT heterozygote combined with gestational VPA exposure serves as a model to investigate interactions between gene and environment.
References
Type
Title
Author, Year
Primary
Characterization of the serotonin transporter knockout rat: a selective change in the functioning of the serotonergic system.
Model Type:
Genetic
Model Genotype:
Homozygous
Mutation:
High-throughput resequencing of target genes in a library of ENU-mutagenized rats (Smits et al., 2006) revealed a C to A transversion at position 3924 (relative to the start codon in ENSRNOG0000003476) in the SERT gene, resulting in a premature stop codon (TGC>TGA) in the third exon encoding the second extracellular loop.
Allele Type: Chemical mutation
Strain of Origin: Wistar/Crl
Genetic Background: Wistar
ES Cell Line: Not Applicable
Mutant ES Cell Line: Not Applicable
Model Source: Unreported
Model Type:
Genetic
Model Genotype:
Heterozygous
Mutation:
High-throughput resequencing of target genes in a library of ENU-mutagenized rats (Smits et al., 2006) revealed a C to A transversion at position 3924 (relative to the start codon in ENSRNOG0000003476) in the SERT gene, resulting in a premature stop codon (TGC>TGA) in the third exon encoding the second extracellular loop.
Allele Type: Chemical mutation
Strain of Origin: Wistar/Crl
Genetic Background: Wistar
ES Cell Line: Not Applicable
Mutant ES Cell Line: Not Applicable
Model Source: Unreported
Model Type:
Pharmaceutical intervention
Model Genotype:
Heterozygous
Mutation:
High-throughput resequencing of target genes in a library of ENU-mutagenized rats (Smits et al., 2006) revealed a C to A transversion at position 3924 (relative to the start codon in ENSRNOG0000003476) in the SERT gene, resulting in a premature stop codon (TGC>TGA) in the third exon encoding the second extracellular loop.
Allele Type: Chemical mutation
Strain of Origin: Wistar/Crl
Genetic Background: Wistar
ES Cell Line: Not Applicable
Mutant ES Cell Line: Not Applicable
Model Source: Unreported
Description: Northern blot shows that premature stop codon results in nonsense-mediated decay; radiolabeled citalopram shows in situ absense of SERT protein
Exp Paradigm: Radioligand binding studies
Description: Northern blot shows that premature stop codon results in nonsense-mediated decay; radiolabeled citalopram shows in situ absense of SERT protein
Exp Paradigm: Northern blot
Description: 13% reduced 5-HT reuptake in hippocampal synaptosomes; no change in intracellular levels of 5-HT and 5-HIAA in hippocampus, caudate putamen, cortex and amygdala
Exp Paradigm: Synaptosomal assay; Autoradiographic analysis
Description: Decrease time in open arms, decreased stretch attend; increased latency in novelty-suppressed feeding
Exp Paradigm: Elevated plus maze test; Novelty-suppressed feeding-Elevated plus maze test
Description: Decrease time in open arms, decreased stretch attend; increased latency in novelty-suppressed feeding
Exp Paradigm: Elevated plus maze test; Novelty-suppressed feeding- Novelty-suppressed feeding paradigm