FLA-63 blocks food-deprivation-induced behavioral arousal in the mouse

Murphy, James M.; Nagy, Z. Michael

doi:10.3758/bf03326666

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…Horizontal locomotion levels from the third day onward did not differ between DER and CTR animals and in both groups, they increased progressively, as did the number of rearings, suggesting that the FA training could effectively induce anticipatory hyperactivity in both groups. Indeed, we showed that horizontal mobility levels were influenced by weight loss, and previous reports have associated food deprivation with elevated locomotion (Murphy and Nagy, 1979;Timberlake and White, 1990). Elevated locomotion could also be explained by circadian food entrainment although such effects are typically observable after a week of food restriction (Boulos et al, 1980;Webb et al, 2009;Patton et al, 2014).…”

Section: Discussionsupporting

confidence: 63%

Maternal neglect alters reward-anticipatory behavior, social status stability, and reward circuit activation in adult male rats

Ryakiotakis,

Fousfouka,

Stamatakis

2023

Front. Neurosci.

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IntroductionAdverse early life experiences affect neuronal growth and maturation of reward circuits that modify behavior under reward predicting conditions. Previous studies demonstrate that rats undergoing denial of expected reward in the form of maternal contact (DER-animal model of maternal neglect) during early post-natal life developed anhedonia, aggressive play-fight behaviors and aberrant prefrontal cortex structure and neurochemistry. Although many studies revealed social deficiency following early-life stress most reports focus on individual animal tasks. Thus, attention needs to be given on the social effects during group tasks in animals afflicted by early life adversity.MethodsTo investigate the potential impact of the DER experience on the manifestation of behavioral responses induced by natural rewards, we evaluated: 1) naïve adult male sexual preference and performance, and 2) anticipatory behavior during a group 2-phase food anticipation learning task composed of a context-dependent and a cue-dependent learning period.ResultsDER rats efficiently spent time in the vicinity of and initiated sexual intercourse with receptive females suggesting an intact sexual reward motivation and consummation. Interestingly, during the context-dependent phase of food anticipation training DER rats displayed a modified exploratory activity and lower overall reward-context association. Moreover, during the cue-dependent phase DER rats displayed a mild deficit in context-reward association while increased cue-dependent locomotion. Additionally, DER rats displayed unstable food access priority following food presentation. These abnormal behaviours were accompanied by overactivation of the ventral prefrontal cortex and nucleus accumbens, as assessed by pCREB levels.Conclusions/discussionCollectively, these data show that the neonatal DER experience resulted in adulthood in altered activation of the reward circuitry, interfered with the normal formation of context-reward associations, and disrupted normal reward access hierarchy formation. These findings provide additional evidence to the deleterious effects of early life adversity on reward system, social hierarchy formation, and brain function.

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