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Estresse pré-natal, perfil de ansiedade de progenitoras na gestação e de sua progênie ao longo do desenvolvimento

  • Soliani, Flaviane Cristina de Brito Guzz...
Publication Date
Jul 23, 2014
Repositório Institucional UNESP
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Considering the relevance of understanding the manifestation of anxiety, given the growing prevalence of this disorder, this dissertation aimed to evaluate the effect of chronic exposure to stressors in different periods of pregnancy on the profile of anxiety of dams and their progeny, in three phases of development. Wistar rats were divided into three groups: Control, Social Separation and Chronic Unpredictable Stress. The stressors were applied in one of the three weeks of pregnancy and the behavioral assessment were conducted using the Elevated Plus Maze at the end of those weeks. The offspring (males) were grouped according to the procedure performed in their mother during pregnancy and were evaluated in the Elevated T Maze in 1 st , 3 rd or 6 th month of life. Control dams presented a low level of anxiety at the end of the 1 st and 2 nd weeks, but there was increased anxiety at the end of 3 rd gestational week, featuring a defense behavioral profile at the proximity of parturition. Control offspring presented increase of generalized anxiety disorder and panic reduction on the 6 th month of life. Dams exposed to social separation (a chronic predictable stressor) showed alterations only when this was applied in the last week of pregnancy, with reduction of anxiety at the end of this period. Nevertheless, their progeny presented varied behaviors, highlighting the increase of generalized anxiety disorder on the 1 st month (separation on 2 nd week) and its reduction on 6 months of age (separation on 1st or 2nd week), and increase of panic (separation on 2nd week)on the 3rd month. Additionally, social separation on the 2 nd week of pregnancy affected the aversive conditioning (learning in avoidances) of the offspring in all ages evaluated, showing impairment on acquisition of aversive memory. Dams exposed to chronic unpredictable stress showed increase in anxiety at the end of all gestational weeks...

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