Abstract：
:Bizarre behaviors (stereotyped stretching, stereotyped rearing, backward movements and jumps) were conspicuously elicited in classical unconditioned tests with different levels of anxiogenic conditions. They were characterized for the first time as early-BPSD-like symptoms in 6 month-old male and female 3xTg-AD mice. The pattern of these behaviors differed from that exhibited by their age- and gender-matched NTg counterparts. Confrontation of an open and illuminated field was the best trigger of such behaviors as compared to mild neophobia in the corner test or the choice between two compartments in the dark-light box. Here we also report that increased freezing, delayed thigmotaxis and enhancement of emotional behaviors were early BPSD-like symptoms indicative of their response to low-stressful environments. Independently of the genotype, consistent gender effects pointed toward the relevance of female gender to study bizarre behaviors and risk assessment. The identification of items of behavior and its gender component were relevant to find out bidirectional and selective behavioral long-lasting effects of postnatal handling. This early life treatment reduced freezing and most of the bizarre behaviors whereas potentiated risk assessment and the horizontal locomotor activity. In contrast, vertical exploratory activity was not modified by the treatment. The results also talk in favor of the beneficence of early-life interventions on the behavioral outcome in adulthood in both healthy and disease conditions. As shown, the consideration of bizarre behaviors and risk assessment may become an additional tool for evaluating BPSD-like symptoms in relation to preventive and/or therapeutical strategies targeted at AD. It may also have a role in the evaluation of the potential risk factors for the disease.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Baeta-Corral R,Giménez-Llort Ldoi
10.1016/j.bbr.2013.10.017subject
Has Abstractpub_date
2014-01-01 00:00:00pages
97-105eissn
0166-4328issn
1872-7549pii
S0166-4328(13)00625-6journal_volume
258pub_type
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journal_title：Behavioural brain research
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