laser-induced-brain-injury-in-the-motor-cortex-of-rats

Laser-Induced Brain Injury in the Motor Cortex of Rats

A common technique for inducing stroke in experimental rodent models involves the transient (often denoted as MCAO-t) or permanent (designated as MCAO-p) ...

measuring-post-stroke-cerebral-edema-infarct-zone-blood-brain-barrier

Measuring Post-Stroke Cerebral Edema, Infarct Zone and Blood-Brain Barrier Breakdown in a Single Set of Rodent Brain Samples

One of the most common causes of morbidity and mortality worldwide is ischemic stroke. Historically, an animal model used to stimulate ischemic stroke ...

assessing-dominant-submissive-behavior-adult-rats-following-traumatic

Assessing Dominant-Submissive Behavior in Adult Rats Following Traumatic Brain Injury

Competition over resources such as food, territory, and mates significantly influences relationships within animal species and is mediated through social ...

Oles Honchar Dnipro National University

Dnepropetrovsk State University

Oles Gonchar of the Dnipro National University

Maternal-deprivation of rodent pups is a relevant model of extreme early-life stress that can be relevant to the understanding of long-term effects of war, migration, parental loss and displacement. Although even mild stress during infancy affects brain development and behavior, the current study focused on the effects of six hour daily maternal-separation, a model that reflects the severe distress often experienced in those circumstances. This study emphasizes the effect of maternal separation on social behavior in the context of a variety of factors that measure cognitive and emotional behavior which were subject to principle component analysis. Sprague-Dawley pups were separated from the dam for 6 h each day during the first 3-weeks of life and underwent a battery of behavioral tests at 3-months of age. We found that rodents exposed to postnatal maternal deprivation displayed submissive behavior in resident-intruder and dominant-submissive tests, as well as significantly more anxiety and anhedonia than control rats. The results of multivariate statistical analysis show that the dominant-submissive behavior correlates with depressive, anxiety and social behavior and can be predicted with an accuracy of 86.2%. The increased submissive behavior in male rats that had been subjected to severe postnatal stress suggests that exposure to stress during infancy and childhood could have long-term effects on social relationships. The mechanism of the long-term effects on depression, anxiety and submissive behavior requires further investigation.

Early life stress induces submissive behavior in adult rats.

Traumatic brain injury (TBI) affects millions of people worldwide, many of whom are affected with post-TBI mood disorders or behavioral changes, including aggression or social withdrawal. Diminished functionality can persist for decades after TBI and delay rehabilitation and resumption of employment. It has been established that there is a relationship between these mental disorders and brain injury. However, the etiology and causal relationships behind these conditions are poorly understood. Rodent models provide a helpful tool for researching mood disorders and social impairment due to their natural tendencies to form social hierarchies. Here, we present a rat model of mental complications after TBI using a suite of behavioral tests to examine the causal relationships between changes in social behavior, including aggressive, hierarchical, depressive, and anxious behavior. For this purpose, we used multivariate analysis to identify causal relationships between the above post-TBI psychiatric sequelae. We performed statistical analysis using principal component analysis, discriminant analysis, and correlation analysis, and built a model to predict dominant-submissive behavior based on the behavioral tests. This model displayed a predictive accuracy of 93.3% for determining dominant-submissive behavior in experimental groups. Machine learning algorithms determined that in rats, aggression is not a principal prognostic factor for dominant-submissive behavior. Alternatively, dominant-submissive behavior is determined solely by the rats' depressive-anxious state and exploratory activity. We expect the causal approach used in this study will guide future studies into mood conditions and behavioral changes following TBI.

ArticleTotal : 3	Year
Publication title	2020
Publication title Cited by 4	2020
Publication title	2022

Article	Year
Early life stress induces submissive behavior in adult rats. Behavioural brain research\| PubMed ID: 31254880
Traumatic brain injury-induced submissive behavior in rats: link to depression and anxiety. Translational psychiatry\| PubMed ID: 35672289	2022

Olena Severynovska

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