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Beltrame RT, Covre C, Littig LB, Martins ADB, Quirino CR, Junior AB, da Costa RLD. Transrectal Doppler sonography of uterine blood flow in ewes during pregnancy. Theriogenology 2016; 91:55-61. [PMID: 28215686 DOI: 10.1016/j.theriogenology.2016.12.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 12/12/2016] [Accepted: 12/14/2016] [Indexed: 01/20/2023]
Abstract
In sheep, there is a lack of information on the behaviour of hemodynamic indices and parameters of blood flow velocity of the uterine artery during pregnancy, making it impossible to determine the real meaning of the values found and their probable relevance in normal physiological or pathological states. The objective of the present study was to evaluate the blood flow velocity parameters and hemodynamic indices of the uterine artery in ewes (18) during pregnancy (33). Based on non-invasive colour Doppler sonography, we evaluated the peak systolic velocity (PS), end diastolic velocity (ED), time-averaged maximum and minimum velocity in a cardiac cycle (TAMAX and TAMEAN), pulsatility index (PI), resistance index (RI), systolic/diastolic ratio (S/D), heart rate (HR), arterial diameter (AD) and the blood flow volume (BFV). Examinations started on day 28 and continued at two-week intervals until parturition. The Doppler parameters and the diameter of the uterine artery underwent significant changes during pregnancy. In the evaluated animals, indices related to resistance of the uterine artery, namely the impedance of blood flow, decreased throughout the initial, middle and late stages of gestation (PI: 1.15, 1.04, 0.97; RI: 0.61, 0.59, 0.57; S/D: 2.68, 2.52, 2.39, respectively) (p < 0.05). In contrast, the contents related to higher uterine irrigation increased during gestation (PS, ED, TAMAX, TAMEAN, HR, AD and BFV) (p < 0.05). No differences were found between the means of the variables in relation to the right and left uterine arteries and between single and multiple pregnancies in the hemodynamic indices. The present study is the first to demonstrate changes in uterine hemodynamics throughout pregnancy in sheep.
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Affiliation(s)
- Renato Travassos Beltrame
- Centro Universitário do Espírito Santo (UNESC), Avenida Fioravante Rossi, 2930, Colatina, ES, 29703-900, Brazil.
| | - Carolina Covre
- Centro Universitário do Espírito Santo (UNESC), Avenida Fioravante Rossi, 2930, Colatina, ES, 29703-900, Brazil
| | - Lucas Buss Littig
- Centro Universitário do Espírito Santo (UNESC), Avenida Fioravante Rossi, 2930, Colatina, ES, 29703-900, Brazil
| | - Amanda de Barros Martins
- Centro Universitário do Espírito Santo (UNESC), Avenida Fioravante Rossi, 2930, Colatina, ES, 29703-900, Brazil
| | - Celia Raquel Quirino
- Universidade Estadual do Norte Fluminense (UENF), Av. Alberto Lamego, 2000, Parque California, Campos dos Goitacazes, RJ, 28035-200, Brazil
| | - Aylton Bartholazzi Junior
- Universidade Estadual do Norte Fluminense (UENF), Av. Alberto Lamego, 2000, Parque California, Campos dos Goitacazes, RJ, 28035-200, Brazil
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Nel K, Rimbach R, Pillay N. Dietary protein influences the life-history characteristics across generations in the African striped mouseRhabdomys. ACTA ACUST UNITED AC 2015; 323:97-108. [DOI: 10.1002/jez.1903] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 09/19/2014] [Accepted: 10/14/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Kerith Nel
- School of Animal; Plant & Environmental Sciences; University of the Witwatersrand; Johannesburg South Africa
| | - Rebecca Rimbach
- School of Animal; Plant & Environmental Sciences; University of the Witwatersrand; Johannesburg South Africa
| | - Neville Pillay
- School of Animal; Plant & Environmental Sciences; University of the Witwatersrand; Johannesburg South Africa
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Morehouse NI, Nakazawa T, Booher CM, Jeyasingh PD, Hall MD. Sex in a material world: why the study of sexual reproduction and sex-specific traits should become more nutritionally-explicit. OIKOS 2010. [DOI: 10.1111/j.1600-0706.2009.18569.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Vidonho AF, da Silva AA, Catanozi S, Rocha JC, Beutel A, Carillo BA, Furukawa LNS, Campos RR, de Toledo Bergamaschi CM, Carpinelli AR, Quintão ECR, Dolnikoff MS, Heimann JC. Perinatal salt restriction: a new pathway to programming insulin resistance and dyslipidemia in adult wistar rats. Pediatr Res 2004; 56:842-8. [PMID: 15470199 DOI: 10.1203/01.pdr.0000145258.75160.5b] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Several studies support the hypothesis that chronic diseases in adulthood might be triggered by events that occur during fetal development. This study examined the consequences of perinatal salt intake on blood pressure (BP) and carbohydrate and lipid metabolism in adult offspring of dams on high-salt [HSD; 8% (HSD2) or 4% (HSD1)], normal-salt (NSD; 1.3%), or low-salt (LSD; 0.15% NaCl) diet during pregnancy and lactation. At 12 wk of age, female Wistar rats were matched with adult male rats that were fed NSD. Weekly tail-cuff BP measurements were performed before, during, and after pregnancy. After weaning, the offspring received only NSD and were housed in metabolic cages for 24-h urine collection for sodium and potassium and nitrate and nitrite excretion measurements. At 12 wk of age, intra-arterial mean BP was measured, a euglycemic-hyperinsulinemic clamp was performed, and plasma lipids and nitrate and nitrite concentrations were determined. Tail-cuff BP was higher during pregnancy in HSD2 and HSD1 than in NSD and LSD dams. Mean BP (mm Hg) was also higher in the offspring of HSD2 (110 +/- 5) and HSD1 (107 +/- 5) compared with NSD (100 +/- 2) and LSD (92 +/- 2). Lower glucose uptake and higher plasma cholesterol and triacylglycerols were observed in male offspring from LSD dams (glucose uptake: HSD2 17 +/- 4, HSD1 15 +/- 3, NSD 11 +/- 3, LSD 4 +/- 1 mg . kg(-1) . min(-1); cholesterol: HSD2 62 +/- 6, HSD1 82 +/- 11, NSD 68 +/- 10, LSD 98 +/- 17 mg/dL; triacylglycerols: HSD2 47 +/- 15, HSD1 49 +/- 12, NSD 56 +/- 19, LSD 83 +/- 11 mg/dL). In conclusion, maternal salt intake during pregnancy and lactation has long-term influences on arterial pressure, insulin sensitivity, and plasma lipids of the adult offspring.
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Affiliation(s)
- Armando F Vidonho
- Laboratory of Experimental Hypertension, Department of Internal Medicine, Nephrology Division, University of São Paulo School of Medicine, 01246-903 São Paulo SP, Brazil
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