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Related Concept Videos

Aggression01:47

Aggression

Humans engage in aggression when they seek to cause harm or pain to another person. Aggression takes two forms depending on one’s motives: hostile or instrumental. Hostile aggression is motivated by feelings of anger with intent to cause pain; a fight in a bar with a stranger is an example of hostile aggression. In contrast, instrumental aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain (Berkowitz, 1993); a contract killer who murders for hire...
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Neurotransmitters

Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.

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Neurotensin inversely modulates maternal aggression.

S C Gammie1, K L D'Anna, H Gerstein

  • 1Department of Zoology, University of Wisconsin, Madison, WI 53706, USA. scgammie@wisc.edu

Neuroscience
|January 3, 2009
PubMed
Summary
This summary is machine-generated.

Neurotensin (NT) inversely regulates maternal aggression. Lowering NT signaling enhances this social behavior, suggesting a novel mechanism for maternal defense.

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Area of Science:

  • Neuroscience
  • Behavioral Neuroscience
  • Molecular Psychiatry

Background:

  • Neurotensin (NT) is a neuropeptide implicated in various CNS functions.
  • NT's role in social behaviors, particularly maternal aggression, remains unexplored.
  • Previous studies noted lower NT expression in highly aggressive maternal mice.

Purpose of the Study:

  • To investigate the direct role of neurotensin in maternal aggression.
  • To determine if NT signaling modulates maternal defense behaviors.
  • To identify brain regions involved in NT's regulation of aggression.

Main Methods:

  • Intracerebroventricular (i.c.v.) administration of NT and NT receptor 1 (NT1) antagonist SR 48692 in mice.
  • Behavioral analysis of maternal aggression (time aggressive, attack number) and other maternal behaviors (pup retrieval).
  • Fos expression analysis in brain regions following NT administration to map neural activity.

Main Results:

  • i.c.v. NT injections significantly impaired maternal aggression at all tested doses.
  • NT injections did not affect other maternal behaviors like pup retrieval, indicating specificity.
  • Administration of the NT1 antagonist SR 48692 significantly increased maternal aggression.
  • NT administration increased Fos expression in key brain regions including the lateral septum, bed nucleus of the stria terminalis, paraventricular nucleus, and central amygdala.

Conclusions:

  • Neurotensin inversely regulates maternal aggression.
  • Reduced NT signaling is a potential mechanism underlying enhanced maternal defense.
  • This study provides the first direct evidence linking neurotensin to a social behavior.