Abstract:
:Forced Swimming Test (FST) models behavioural despair in animals by loss of motivation to respond or the refusal to escape. The present study was aimed at characterizing genetic (genotype and gender) and environmental factors (age/stage of disease and rearing conditions: C, standard; H, early postnatal handling; EE, environmental enrichment consisting in physical exercise as well as social and object enrichment) that may modulate the poor behavioural and cognitive flexibility response we have recently described in 12-month-old male 3xTg-AD mice in the FST. The comprehensive analysis of the ethogram shown in the FST considered the intervals of the test (0-2 and 2-6min), all the elicited behavioural responses (immobility, swimming and climbing) and their features (total duration and frequency of episodes). The long persistence of behaviours found in 17-month-old (late-stages of disease) 3xTg-AD mice was comparable to that recently described in males at 12 months of age (beginning of advanced stages) but also suggested increased age-dependent frailty in both genotypes. The poor behavioral flexibility of 3xTg-AD mice to elicit the behavioural despair shown by the NTg mice, was also found in the female gender. Finally, the present work demonstrates that early-life interventions were able to improve the time and frequency of episodes of immobility, being more evident in the female gender of both old NTg and 3xTg-AD mice. Ontogenic modulation by early-postnatal handling resulted in a more effective long-term improvement of the elicited behaviours in the FST than that achieved by environmental enrichment. The results talk in favor of the beneficence of early-life interventions on ageing in both healthy and disease conditions.
journal_name
Behav Processesjournal_title
Behavioural processesauthors
Torres-Lista V,Giménez-Llort Ldoi
10.1016/j.beproc.2015.09.011subject
Has Abstractpub_date
2015-11-01 00:00:00pages
120-7eissn
0376-6357issn
1872-8308pii
S0376-6357(15)30041-3journal_volume
120pub_type
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