Brief daily postpartum separations from the litter alter dam response to psychostimulants and to stress
Neonatal handling induces several behavioral and neurochemical alterations in pups, including decreased responses to stress and reduced fear in new environments. However, there are few reports in the literature concerning the behavioral effects of this neonatal intervention on the dams during the po...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Divulgação Científica
2013-05-01
|
| Series: | Brazilian Journal of Medical and Biological Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000500426&lng=en&tlng=en |
| _version_ | 1818134366459527168 |
|---|---|
| author | P.P. Silveira C. da Silva Benetti A.K. Portella L.A. Diehl R. Dalle Molle A.B. Lucion C. Dalmaz |
| author_facet | P.P. Silveira C. da Silva Benetti A.K. Portella L.A. Diehl R. Dalle Molle A.B. Lucion C. Dalmaz |
| author_sort | P.P. Silveira |
| collection | DOAJ |
| description | Neonatal handling induces several behavioral and neurochemical alterations in pups, including decreased responses to stress and reduced fear in new environments. However, there are few reports in the literature concerning the behavioral effects of this neonatal intervention on the dams during the postpartum period. Therefore, the aim of the current study was to determine if brief postpartum separation from pups has a persistent impact on the dam's stress response and behavior. Litters were divided into two neonatal groups: 1) non-handled and 2) handled [10 min/day, from postnatal day (PND) 1 to 10]. Weaning occurred at PND 21 when behavioral tasks started to be applied to the dams, including sweet food ingestion (PND 21), forced swimming test (PND 28), and locomotor response to a psychostimulant (PND 28). On postpartum day 40, plasma was collected at baseline for leptin assays and after 1 h of restraint for corticosterone assay. Regarding sweet food consumption, behavior during the forced swimming test or plasma leptin levels did not differ between dams briefly separated and non-separated from their pups during the postpartum period. On the other hand, both increased locomotion in response to diethylpropion and increased corticosterone secretion in response to acute stress were detected in dams briefly separated from their pups during the first 10 postnatal days. Taken together, these findings suggest that brief, repeated separations from the pups during the neonatal period persistently impact the behavior and induce signs of dopaminergic sensitization in the dam. |
| first_indexed | 2024-12-11T09:07:29Z |
| format | Article |
| id | doaj.art-45f09816de834d24996a35a1fd3f3586 |
| institution | Directory Open Access Journal |
| issn | 1414-431X |
| language | English |
| last_indexed | 2024-12-11T09:07:29Z |
| publishDate | 2013-05-01 |
| publisher | Associação Brasileira de Divulgação Científica |
| record_format | Article |
| series | Brazilian Journal of Medical and Biological Research |
| spelling | doaj.art-45f09816de834d24996a35a1fd3f35862022-12-22T01:13:35ZengAssociação Brasileira de Divulgação CientíficaBrazilian Journal of Medical and Biological Research1414-431X2013-05-0146542643210.1590/1414-431X20132784S0100-879X2013000500426Brief daily postpartum separations from the litter alter dam response to psychostimulants and to stressP.P. SilveiraC. da Silva BenettiA.K. PortellaL.A. DiehlR. Dalle MolleA.B. LucionC. DalmazNeonatal handling induces several behavioral and neurochemical alterations in pups, including decreased responses to stress and reduced fear in new environments. However, there are few reports in the literature concerning the behavioral effects of this neonatal intervention on the dams during the postpartum period. Therefore, the aim of the current study was to determine if brief postpartum separation from pups has a persistent impact on the dam's stress response and behavior. Litters were divided into two neonatal groups: 1) non-handled and 2) handled [10 min/day, from postnatal day (PND) 1 to 10]. Weaning occurred at PND 21 when behavioral tasks started to be applied to the dams, including sweet food ingestion (PND 21), forced swimming test (PND 28), and locomotor response to a psychostimulant (PND 28). On postpartum day 40, plasma was collected at baseline for leptin assays and after 1 h of restraint for corticosterone assay. Regarding sweet food consumption, behavior during the forced swimming test or plasma leptin levels did not differ between dams briefly separated and non-separated from their pups during the postpartum period. On the other hand, both increased locomotion in response to diethylpropion and increased corticosterone secretion in response to acute stress were detected in dams briefly separated from their pups during the first 10 postnatal days. Taken together, these findings suggest that brief, repeated separations from the pups during the neonatal period persistently impact the behavior and induce signs of dopaminergic sensitization in the dam.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000500426&lng=en&tlng=enFeeding behaviorNeonatal handlingPsychostimulantsStress responseDam behavior |
| spellingShingle | P.P. Silveira C. da Silva Benetti A.K. Portella L.A. Diehl R. Dalle Molle A.B. Lucion C. Dalmaz Brief daily postpartum separations from the litter alter dam response to psychostimulants and to stress Brazilian Journal of Medical and Biological Research Feeding behavior Neonatal handling Psychostimulants Stress response Dam behavior |
| title | Brief daily postpartum separations from the litter alter dam response to psychostimulants and to stress |
| title_full | Brief daily postpartum separations from the litter alter dam response to psychostimulants and to stress |
| title_fullStr | Brief daily postpartum separations from the litter alter dam response to psychostimulants and to stress |
| title_full_unstemmed | Brief daily postpartum separations from the litter alter dam response to psychostimulants and to stress |
| title_short | Brief daily postpartum separations from the litter alter dam response to psychostimulants and to stress |
| title_sort | brief daily postpartum separations from the litter alter dam response to psychostimulants and to stress |
| topic | Feeding behavior Neonatal handling Psychostimulants Stress response Dam behavior |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000500426&lng=en&tlng=en |
| work_keys_str_mv | AT ppsilveira briefdailypostpartumseparationsfromthelitteralterdamresponsetopsychostimulantsandtostress AT cdasilvabenetti briefdailypostpartumseparationsfromthelitteralterdamresponsetopsychostimulantsandtostress AT akportella briefdailypostpartumseparationsfromthelitteralterdamresponsetopsychostimulantsandtostress AT ladiehl briefdailypostpartumseparationsfromthelitteralterdamresponsetopsychostimulantsandtostress AT rdallemolle briefdailypostpartumseparationsfromthelitteralterdamresponsetopsychostimulantsandtostress AT ablucion briefdailypostpartumseparationsfromthelitteralterdamresponsetopsychostimulantsandtostress AT cdalmaz briefdailypostpartumseparationsfromthelitteralterdamresponsetopsychostimulantsandtostress |