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Related Concept Videos

Human Genetics01:28

Human Genetics

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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.
The complex relationship between genetics and psychology is observable through common biological components such...
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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
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Related Experiment Video

Updated: May 2, 2026

Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
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Genetic variation in CACNA1C affects neural processing in major depression.

Heidelore Backes1, Bruno Dietsche1, Arne Nagels1

  • 1Department of Psychiatry and Psychotherapy, Philipps-University Marburg, Rudolf-Bultmann-Str. 8, 35039 Marburg, Germany.

Journal of Psychiatric Research
|March 12, 2014
PubMed
Summary

Genetic variations in the CACNA1C gene (rs1006737) impact brain activity during semantic verbal fluency (SVF) tasks in major depressive disorder (MDD) patients. The A allele is linked to altered neural responses in the frontal lobe and cerebellum, suggesting a potential mechanism for MDD susceptibility.

Keywords:
CACNA1CCerebellumLeft inferior frontal gyrusMajor depressionVerbal fluencyfMRI

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Background:

  • Major depressive disorder (MDD) is associated with altered prefrontal brain function and impaired semantic verbal fluency (SVF).
  • The A allele of the single nucleotide polymorphism rs1006737 in the CACNA1C gene is overrepresented in MDD patients.
  • Previous studies linked this allele to poorer SVF performance and increased left inferior frontal gyrus (IFG) activation in healthy individuals.

Purpose of the Study:

  • To investigate the effects of the rs1006737 polymorphism on neural processing during SVF tasks in patients with MDD.
  • To explore the association between CACNA1C gene variation and brain activity in the context of MDD.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity in 40 MDD patients and 40 matched controls during an SVF task.
  • Participants overtly generated words in response to semantic category cues.
  • Whole-brain analyses examined the impact of rs1006737 genotype on task-related brain activation and functional coupling.

Main Results:

  • Genotype significantly affected brain activity in MDD patients.
  • Patients with the A allele showed increased activation in the left middle/inferior frontal gyrus and bilateral cerebellum compared to GG genotype patients.
  • Enhanced functional coupling was observed between left and right frontal gyri in A allele carriers.
  • No significant differences in SVF performance or brain activation were found between MDD patients and controls based on genotype.

Conclusions:

  • Genetic variation in CACNA1C (rs1006737) modulates neural responses in the left IFG and cerebellum during SVF in MDD patients.
  • These functional alterations in prefrontal and cerebellar areas may contribute to the susceptibility to MDD.
  • The findings highlight the role of specific genetic variations in the neural mechanisms underlying MDD.