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Related Concept Videos

Human Genetics01:28

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
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Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role...
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Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
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Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
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Related Experiment Video

Updated: Mar 22, 2026

Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome
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Face and emotion expression processing and the serotonin transporter polymorphism 5-HTTLPR/rs22531.

A Hildebrandt1, A Kiy1, M Reuter2,3

  • 1Department of Psychology, Ernst-Moritz-Arndt-Universität Greifswald.

Genes, Brain, and Behavior
|April 16, 2016
PubMed
Summary
This summary is machine-generated.

The serotonin transporter gene (5-HTTLPR/rs25531) influences facial emotion recognition. Individuals with two long alleles show better emotion perception compared to those with short alleles.

Keywords:
5-HTTLPRface cognitionfacial expression perception and recognitiongene-behavior relationshiprs22531socio-emotional abilities

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Area of Science:

  • Neuroscience
  • Behavioral Genetics
  • Social Psychology

Background:

  • Face cognition is vital for social interaction.
  • Molecular genetic studies on face cognition are limited.
  • The serotonin transporter gene (5-HTTLPR/rs25531) is implicated in socio-emotional processing.

Purpose of the Study:

  • To investigate the association between 5-HTTLPR/rs25531 polymorphisms and face perception (identity and emotion).
  • To examine discriminant validity by including non-social cognitive abilities.

Main Methods:

  • Structural equation modeling was used.
  • Data from 230 young adults were analyzed.
  • A comprehensive, multivariate task battery assessed face perception, memory, and fluid intelligence.

Main Results:

  • A robust association was found between 5-HTTLPR/rs25531 polymorphism and facial emotion perception.
  • Carriers of two long (L) alleles outperformed carriers of one or two short (S) alleles.
  • Weaker associations were observed for face identity perception and memory for emotional faces; no association with non-social abilities was found.

Conclusions:

  • The 5-HTTLPR/rs25531 polymorphism significantly impacts facial emotion perception.
  • Findings suggest a specific role of this polymorphism in socio-emotional abilities, distinct from general cognitive functions.
  • Further research into neural mechanisms is warranted.