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Fetal development and renal function in adult rats prenatally subjected to sodium overload

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Abstract

The aims of this study were (1) to evaluate two factors that affect fetal development—placental oxidative stress (Ox) and plasma volume (PV)—in dams with sodium overload and (2) to correlate possible alterations in these factors with subsequent modifications in the renal function of adult offspring. Wistar dams were maintained on 0.17 M NaCl instead of water from 20 days before mating until either the twentieth pregnancy day/parturition or weaning. Colorimetric methods were used to measure Ox in maternal and offspring tissues, PV, 24-h urinary protein (UProt24 h) and serum triacylglycerols (TG) and cholesterol (Chol). Renal hemodynamics was evaluated in the offspring at 90 days of age using a blood pressure transducer, a flow probe and inulin clearance to measure mean arterial pressure (MAP), renal blood flow and glomerular filtration rate (GFR), respectively. The number of nephrons (NN) was counted in kidney suspensions. Dams showed unchanged PV, placental Ox and fetal weight but increased UProt24 h (150%, P < 0.05). Prenatally sodium-overloaded pups showed increased UProt24 h (45%, P < 0.05) but unchanged MAP, renal hemodynamics, NN and kidney Ox. Prenatally and postnatally sodium-overloaded rats showed increased UProt24 h (27%, P < 0.05) and kidney Ox (44%, P < 0.05), reduced GFR (12%, P < 0.05), increased PV (26%, P < 0.05) and unchanged MAP and NN. The TG increased in both groups of treated offspring (21%, P < 0.05), whereas Chol increased only in the postnatally sodium-overloaded group. We conclude that salt overload from the prenatal stage until weaning leads to alterations in lipid metabolism and in the renal function of the pups, which are additional to those alterations seen in rats only overloaded prenatally.

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Acknowledgments

This research was financed with grants from the Brazilian Research Council (grant number 470196/2007-6), CAPES/PROCAD (grant 00852) and FACEPE (grant BIC-0618-2.07/07).

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Authors and Affiliations

  1. Departamento de Fisiologia e Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, s/n, Cidade Universitária, 50670-901, Recife, PE, Brazil

    Henriqueta D. Cardoso, Edjair V. Cabral, Leucio D. Vieira-Filho & Ana D. O. Paixão

  2. Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, 21941-590, Rio de Janeiro, RJ, Brazil

    Adalberto Vieyra

  3. Instituto Nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagem, 21941-590, Rio de Janeiro, RJ, Brazil

    Leucio D. Vieira-Filho, Adalberto Vieyra & Ana D. O. Paixão

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  1. Henriqueta D. Cardoso
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  2. Edjair V. Cabral
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  3. Leucio D. Vieira-Filho
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  4. Adalberto Vieyra
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  5. Ana D. O. Paixão
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Correspondence to Ana D. O. Paixão.

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Cardoso, H.D., Cabral, E.V., Vieira-Filho, L.D. et al. Fetal development and renal function in adult rats prenatally subjected to sodium overload. Pediatr Nephrol 24, 1959–1965 (2009). https://doi.org/10.1007/s00467-009-1247-1

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  • DOI: https://doi.org/10.1007/s00467-009-1247-1

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