Cited by 224Neurotransmitter Receptor Influence on BehaviorGenetic Associations and EpidemiologySchizophrenia research and treatment

Serotonin transporter promoter and intron 2 polymorphisms: relationship between allelic variants and gene expression

Hranilovic, Dubravka, Stefulj, Jasminka, Schwab, Sibylle, Borrmann-Hassenbach, Margitta, Albus, Margot, Jernej, Branimir, Wildenauer, Dieter·2004·Biological Psychiatry

Abstract

Background Two polymorphic regions of serotonin transporter (5-HTT) gene: a 44 base pair (bp) insertion/deletion in the promoter region (5-HTTLPR) and a 17 bp variable number of tandem repeats in second intron (VNTR-2), seem to modulate the gene's transcription in allele-dependent manner.Methods We have earlier demonstrated association with 5-HTT gene in families multiply affected by schizophrenia. Here, we investigated separate and combined effects of VNTR-2 and 5-HTTLPR on the rate of peripheral 5-HTT transcription in a sample of offspring from those families. Relative 5-HTT mRNA levels were determined in 53 permanent lymphoblast cell lines by semiquantitative real-time polymerase chain reaction using beta-actin as reference.Results Since the low-expressing alleles (short [S], 10) appeared to act dominantly, genotypes were grouped as "high-expressing" (long [L]/L, 12/12) versus "low-expressing" (S, 10). At both loci, nonsignificant differences in 5-HTT mRNA levels ( approximately 30%) were observed between "high"- and "low-expressing" genotypes. In order to search for the potential combined effect of 5-HTTLPR and VNTR-2, levels of 5-HTT mRNA were compared among three groups of samples having "low-expressing" genotype at none, one, or both loci. Increase in number of "low-expressing" genotypes significantly reduced relative 5-HTT gene expression (p <.02).Conclusions Our results indicate weak individual influence, but possible combined effect, of 5-HTTLPR and VNTR-2 polymorphisms on 5-HTT gene expression.

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Crossref · 10.1016/j.biopsych.2004.01.029

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Authors
Hranilovic, D., Stefulj, J., Schwab, S., Borrmann-Hassenbach, M., Albus, M., Jernej, B., & Wildenauer, D.
Affiliations
  • University of Bonn (DE)
  • Ruđer Bošković Institute (HR)
Corresponding author
Jernej, Branimir
Venue
Biological Psychiatry
Publisher
Elsevier BV
Published
2004-06
Volume
55
Issue
11
Pages
1090-1094
ISSN
0006-3223 (ISSN-L)
OpenAlex
W2011793525
Cited by
224
References
48
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 5 · 2020: 3 · 2019: 5 · 2018: 9 · 2017: 3 · 2016: 6 · 2015: 5 · 2014: 11 · 2013: 11 · 2012: 14
FWCI
5.87
Type
journal article
Language
en
Open access
closed
Locations
  • Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Bundesministerium für Bildung und Forschung
  • Ministry of Science and Technology, Croatia
  • Deutsche Forschungsgemeinschaft (400)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
Keywords
serotonin transporter, serotonin transporter gene, 5-HTTLPR, promoter polymorphism, variable number tandem repeats, gene expression, mRNA levels, schizophrenia, family-based association, lymphoblastoid cell lines
MeSH terms
Adult, Analysis of Variance, Carrier Proteins, Family Health, Female, Genotype, Humans, Lymphocytes, Male, Membrane Glycoproteins, Nerve Tissue Proteins, Polymorphism, Genetic, Promoter Regions, Genetic, RNA, Messenger, Schizophrenia, Gene Expression, Minisatellite Repeats, Reverse Transcriptase Polymerase Chain Reaction, Membrane Transport Proteins, Serotonin Plasma Membrane Transport Proteins

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