Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-10-20T21:50:55Z No. of bitstreams: 1 2010 - Fabr?cia Gon?alves de Oliveira.pdf: 3004332 bytes, checksum: 2be6a40f5f6dc0cb0c93d29552abee56 (MD5) Made available in DSpace on 2020-10-20T21:50:55Z (GMT). No. of bitstreams: 1 2010 - Fabr?cia Gon?alves de Oliveira.pdf: 3004332 bytes, checksum: 2be6a40f5f6dc0cb0c93d29552abee56 (MD5) Previous issue date: 2010-09-03 The renin-angiotensin system (RAS) has been involved with the organization ontogenetic neural systems related to affective behavior. However, there is no known evidence of the involvement of RAS in ontogeny of systems that control hydroelectrolytic equilibrium. This dissertation aimed to investigate the effect of treatment with drugs affecting the activity of RAS during pregnancy and lactation of rats and its effects on offspring on natriorexigenic response in adulthood. The change of RAS was raised with the administration subcutaneous administration of captopril (50 mg / kg), an ACE inhibitor; isoproterenol (300 mg/kg), a betablocker; losartan (50 mg/kg), a blocker of ANG II receptors and furosemide (10 mg/kg), a potent diuretic handle, from seventh day of pregnancy to fourteenth day after parturition. To investigate the influence of these drugs during and after treatment on the homeostatic programming the individual was assessed indirectly through feeding behavior, the electrolytic equilibrium of adult rats by measurements of basal and under stimulation (water deprivation, sodium depletion with furosemide 20mg. kg-1, s.c.) as compared with the influence of neonatal changing of the RAS. In these assays were evaluated intakes of water and NaCl 0,3M. Furthermore, we tested the milk intake and intake of food under basal conditions in adulthood. Also, it was evaluated mortality rate in the treatments and the volume of urine correlating with the effect of drugs on RAS. The results showed changes in appetite and satiety of the neonate, reflected the lowest intake of milk in the treated group with isoproterenol, suggesting a supra-regulation of the RAS with subsequent change the electrolytic equilibrium of the body. It was also observed that in the baseline protocol using isoproterenol affected the intake of saline to 1440 min, and therefore have lower intake than group control. In the protocol of deprivation had lower water intake in the group treated with captopril in time 1440 min and no changes in ingestion of saline. It was also observed that in the depletion protocol, there was a lower percentage of water intake in the groups treated with captopril, isoproterenol and furosemide, at 1440 min, compared to group control. However, in this protocol, no significant difference was observed in response natriorexigenic. Regarding the baseline intake ration, no significant difference in the groups treated compared to control. Furthermore, the protocol baseline, there was a highest percentage in volume of urine in the group treated with captopril while the protocol of deprivation, there was less volume in groups isoproterenol and furosemide. In the depletion protocol, there was less volume in the three groups. Also observed a high rate of mortality in animals from mothers treated with losartan. In short, these results demonstrate that the use of drugs during the period neonatal programming alters the homeostatic balance electrolyte and expression of ingestive behavior in rats adults. O sistema renina-angiotensina (SRA) tem sido implicado com a organiza??o ontog?nica de sistemas neurais relacionados com o comportamento afetivo. Entretanto, n?o s?o conhecidas evid?ncias do envolvimento do SRA na ontog?nese de sistemas que controlam o equil?brio hidroeletrol?tico. Nesta disserta??o objetivou-se investigar o efeito do tratamento com drogas que influenciam a atividade do SRA durante a gesta??o e lacta??o de ratas e suas repercuss?es na resposta natriorexig?nica da prole na vida adulta. A altera??o do SRA foi evocada com a administra??o subcut?nea de captopril (50 mg/kg), um inibidor da ECA; isoproterenol (300 ?g/kg), um betabloqueador; losartan (50 mg/kg), um bloqueador dos receptores de ANG II e furosemida (10mg/kg), um potente diur?tico da al?a, do s?timo dia de gesta??o at? o d?cimo quarto dia ap?s o parto. A fim de investigar a influ?ncia dessas drogas, durante e ap?s o tratamento, sobre a programa??o homeost?tica do indiv?duo, foi avaliado indiretamente, atrav?s de comportamento ingestivo, o equil?brio hidroeletrol?tico dos ratos adultos atrav?s das mensura??es basais e sob estimula??o (priva??o h?drica, deple??o de s?dio com furosemida 20mg. kg-1, s.c) correlacionando com a influ?ncia da altera??o neonatal do SRA. Nestes ensaios experimentais foram avaliadas as ingest?es de ?gua e NaCl 0,3 M. Ademais, foram avaliadas a ingest?o de leite e a ingest?o de alimento sob condi??es basais na idade adulta. Foi avaliado tamb?m o ?ndice de mortalidade nos tratamentos e o volume de urina, correlacionando com o efeito das drogas no SRA. Os resultados demonstraram altera??es no apetite e na saciedade do neonato, refletido pela menor ingest?o de leite nos animais do grupo tratado com isoproterenol, sugerindo a supra-regula??o do SRA com subseq?ente altera??o do equil?brio hidroeletrol?tico do corpo. Observou-se tamb?m que, no protocolo basal o uso de isoproterenol afetou a ingest?o de salina aos 1440 min, tendo, portanto, menor ingest?o em rela??o ao grupo controle. No protocolo de priva??o houve menor ingest?o de ?gua no grupo tratado com captopril no tempo 1440 min e n?o ocorreram altera??es na ingest?o de salina. Observou-se ainda que, no protocolo de deple??o, houve menor percentual de ingest?o de ?gua nos grupos tratados com captopril, isoproterenol e furosemida, aos 1440 min, em rela??o ao grupo controle. Por?m, neste protocolo, n?o foi observada diferen?a significativa na resposta natriorexig?nica. Em rela??o ? ingest?o basal de ra??o, n?o houve diferen?a significativa dos grupos tratados em rela??o ao controle. Al?m disso, no protocolo basal, foi observado um maior percentual no volume de urina do grupo tratado com captopril enquanto que no protocolo de priva??o, houve menor volume nos grupos isoproterenol e furosemida. J? no protocolo de deple??o, houve menor volume nos tr?s grupos tratados. Ademais foi observado alto ?ndice de mortalidade em animais provenientes de m?es tratadas com losartan. Em suma, estes resultados demonstram que o uso de drogas durante o per?odo neonatal altera a programa??o da homeostase do equil?brio hidroeletrol?tico e da express?o comportamental ingestiva em ratos adultos.