NDLI: Short- and long-term effects of a maternal low-protein diet on ventilation, O2/CO2 chemoreception and arterial blood pressure in male rat offspring

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Short- and long-term effects of a maternal low-protein diet on ventilation, O2/CO2 chemoreception and arterial blood pressure in male rat offspring

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Short- and long-term effects of a maternal low-protein diet on ventilation, O2/CO2 chemoreception and arterial blood pressure in male rat offspring

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	de Brito Alves, José Luiz Nogueira, Viviane Oliveira de Oliveira, Gerliny Bezerra da Silva, Glauber Santos Ferreira Wanderley, Almir Gonçalves Leandro, Carol Góis Costa-Silva, João Henrique
Description	Country affiliation: Brazil Author Affiliation: de Brito Alves JL ( Department of Nutrition, Federal University of Pernambuco, Pernambuco 50670-901, Brazil.); Nogueira VO ( Department of Physical Education and Sport Sciences, Federal University of Pernambuco, Vitória de Santo Antão - Pernambuco, 55608-680, Brazil.); de Oliveira GB ( Department of Physical Education and Sport Sciences, Federal University of Pernambuco, Vitória de Santo Antão - Pernambuco, 55608-680, Brazil.); da Silva GS ( Department of Physiology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo 14049-900, Brazil.); Wanderley AG ( Department of Physiology and Pharmacology, Federal University of Pernambuco, Pernambuco 50670-901, Brazil.); Leandro CG ( Department of Nutrition, Federal University of Pernambuco, Pernambuco 50670-901, Brazil.); Costa-Silva JH ( Department of Physical Education and Sport Sciences, Federal University of Pernambuco, Vitória de Santo Antão - Pernambuco, 55608-680, Brazil.)
Abstract	Maternal undernutrition increases the risk of adult arterial hypertension. The present study investigated the short- and long-term effects of a maternal low-protein diet on respiratory rhythm, O2/CO2 chemosensitivity and arterial blood pressure (ABP) of the offspring. Male Wistar rats were divided into two groups according to their mothers' diets during gestation and lactation: control (NP, 17 % of casein) and low-protein (LP, 8 % of casein) groups. Direct measurements of ABP, respiratory frequency (RF), tidal volume (VT) and ventilation (VE), as well as hypercapnia (7 % CO2) and hypoxia (7 % O2) evoked respiratory responses were recorded from the awake male offspring at the 30th and 90th days of life. Blood samples were collected for the analyses of protein, creatinine and urea concentrations. The LP offspring had impaired body weight and length throughout the experiment. At 30 d of age, the LP rats showed a reduction in the concentrations of total serum protein (approximately 24 %). ABP in the LP rats was similar to that in the NP rats at 30 d of age, but it was 20 % higher at 90 d of age. With respect to ventilatory parameters, the LP rats showed enhanced RF (approximately 34 %) and VE (approximately 34 %) at 30 d of age, which was associated with increased ventilatory responses to hypercapnia (approximately 21 % in VE) and hypoxia (approximately 82 % in VE). At 90 d of age, the VE values and CO2/O2 chemosensitivity of the LP rats were restored to the control range, but the RF values remained elevated. The present data show that a perinatal LP diet alters respiratory rhythm and O2/CO2 chemosensitivity at early ages, which may be a predisposing factor for increased ABP at adulthood.
File Format	HTM / HTML
ISSN	00071145
Issue Number	4
Volume Number	111
e-ISSN	14752662
Journal	British Journal of Nutrition
Language	English
Publisher	Cambridge University Press (on behalf of The Nutrition Society)
Publisher Date	2014-02-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Nutritional Discipline Sciences Blood Pressure Diet, Protein-restricted Adverse Effects Dietary Proteins Administration & Dosage Hypertension Etiology Maternal Nutritional Physiological Phenomena Prenatal Exposure Delayed Effects Respiration Animal Nutritional Physiological Phenomena Animals Blood Proteins Metabolism Body Size Carbon Dioxide Blood Female Hypercapnia Physiopathology Anoxia Lactation Oxygen Pregnancy Rats Rats, Wistar Time Factors Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Nutrition and Dietetics Medicine

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