Publication: Cardiac, renal and uterine hemodynamics
changes throughout pregnancy in rats with a
prolonged high fat diet from an early age.
Authors
Llinás Más, María Teresa ; Oltra, Lidia ; Reverte Ribó, Virginia ; Tapia, Antonio ; Moreno, Juan Manuel ; Salazar, Francisco Javier
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Publisher
Public Library of Science
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DOI
https://doi.org/10.1371/journal.pone.0234861
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info:eu-repo/semantics/article
Description
Abstract
Objective: To examine whether the cardiac, renal and uterine physiological hemodynamic
changes during gestation are altered in rats with an early and prolonged exposure to a high fat
diet (HFD).
Methods: Arterial pressure and cardiac, renal, uterine and radial arteries hemodynamic
changes during gestation were examined in adult SD rats exposed to normal (13%) (n=8) or
high (60%) (n=8) fat diets from weaning. Plethysmography, high-resolution high-frequency
ultrasonography and clearance of an inulin analog were used to evaluate the arterial pressure
and hemodynamic changes before and at days 7, 14 and 19 of gestation.
Results: Arterial pressure was higher (P<0.05) in rats with high than in those with normal
(NFD) fat diet before pregnancy (123 ±3 and 110 ±3 mmHg, respectively) and only decreased
at day 14 of gestation in rats with NFD (98±4 mmHg, P<0.05). A significant increment in
stroke volume (42 ±10%) and cardiac output (51 ±12%) was found at day 19 of pregnancy in
rats with NFD. The changes in stroke volume and cardiac output were similar in rats with
NFD and HFD. When compared to the values obtained before pregnancy, a transitory
elevation in renal blood flow was found at day 14 of pregnancy in both groups. However,
glomerular filtration rate only increased (P<0.05) in rats with NFD at days 14 (20 ±7%) and
19 (27 ±8%) of gestation. The significant elevations of mean velocity, and velocity time
integral throughout gestation in radial (127 ±26% and 111 ±23%, respectively) and uterine
(91 ±16% and 111 ±25%, respectively) arteries of rats with NFD were not found in rats with
an early and prolonged HFD.
Summary: This study reports novel findings showing that the early and prolonged exposure to
a HFD leads to a significant impairment in the renal, uterine and radial arteries hemodynamic
changes associated to gestation.
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Citation
PLoS ONE 15(6): e0234861.
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