Maternal Fetal Exchange
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Transferência transplacentária de anticorpos anti-Streptococcus B nos recém-nascidos de termo e pré-termo / Placental transfer of anti-Streptococcus B antibodies in term and preterm newborn babies
O Streptococcus do Grupo B (EGB) é um dos principais agentes de infecção no período neonatal, sendo responsável por altos índices de morbimortalidade materno-fetal. Este estudo tem por objetivo avaliar a passagem transplacentária de anticorpos anti-Streptococcus B e imunoglobulina G em recém-nascidos de termo e pré-termo, bem como comparar seus nív
Publicado em: 2008
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2. Plasma amino acids in pregnancy, placental intervillous space and preterm newborn infants
Plasma amino acid levels have never been studied in the placental intervillous space of preterm gestations. Our objective was to determine the possible relationship between plasma amino acids of maternal venous blood (M), of the placental intervillous space (PIVS) and of the umbilical vein (UV) of preterm newborn infants. Plasma amino acid levels were analyz
Brazilian Journal of Medical and Biological Research. Publicado em: 05/04/2007
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3. Development of the placenton in water buffalo (Bubalus bubalis bubalis Linnaeus, 1758) / Desenvolvimento do placentônio em búfalos (Bubalus bubalis bubalisLinnaeus, 1758)
The ruminant placenta has an uniform gross structure based on specialized areas of feto-maternal membrane apposition and proliferation: the placentons. By exerting a fundamental role for the development of the pregnancy, these structures have been very well studied in several domestic species of commercial interest. Particularly in the buffalo, however, ther
Publicado em: 2000
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4. Exchange of carbon dioxide in the pregnant rhesus monkey: multicompartmental analysis of carbon dioxide kinetics
The exchange of carbon dioxide in the pregnant rhesus monkey has been studied quantitatively using sodium bicarbonate-14C and applying the model of a system of seven compartments. The transfer rates among the various compartments, compartment sizes, and the rate of production of carbon dioxide by fetus and mother were determined with a computer programmed to
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5. In utero analysis of sister chromatid exchange: alterations in suscptibility to mutagenic damage as a function of fetal cell type and gestational age.
Frequencies of baseline and cyclophosphamide-induced sister chromatid exchanges (SCE) were measured in mouse maternal and fetal cells between days 11 and 19 of gestation. Baseline levels of SCE did not vary as a function of gestational age in either the mother or fetus. Cyclophosphamide-induced SCE frequencies remained constant in maternal cells but declined
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6. Transport of calcium by the placenta of the rat.
Transport of 45Ca and of radioactively labelled inert saccharides across the intact or perfused placenta was measured in the rat on day 21 of pregnancy, the day after mating being day 1. The values of permeability--surface area product (PS) of the intact placenta to radioactive mannitol, sucrose, raffinose, and methoxyinulin were approximately proportional t
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7. Respiratory Function of the Placenta as Determined with Carbon Monoxide in Sheep and Dogs*
A technique is described for studying the respiratory function of the placenta using carbon monoxide, a gas whose exchange across the placenta between the maternal and fetal circulations is limited by diffusion rather than blood flow.
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8. The Uterine Placental Bed Renin-Angiotensin System in Normal and Preeclamptic Pregnancy
Previously, we demonstrated activation of the renin-angiotensin system in the fetal placental chorionic villi, but it is unknown whether the immediately adjacent area of the maternal uterine placental bed is regulated similarly. This study measured angiotensin peptides, renin-angiotensin system component mRNAs, and receptor binding in the fundus from nonpreg
The Endocrine Society.
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9. Purification of a distinct placental lactogen receptor, a new member of the growth hormone/prolactin receptor family.
Recent findings from this laboratory suggest that the biological actions of placental lactogen (PL) in mammalian fetal tissues are mediated through binding of the hormone to a distinct and unique PL receptor. We have now purified this receptor from fetal and maternal sheep liver, characterized its binding to PL, growth hormone (GH), and prolactin (PRL), and
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10. High affinity of lead for fetal haemoglobin.
In-vitro experiments using 203Pb were performed to identify lead-binding components in human haemoglobin. Sephadex A-50 ion-exchange chromatography of haemolysate showed that different types of haemoglobin had different affinities for lead. For the haemolysate from adults, lead was present in both Hb A (alpha 2 beta 2) and Hb A2 (alpha 2 delta 2), whereas, i
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11. Effect of lung liquid volume on respiratory performance after caesarean delivery in the lamb.
1. The volume of liquid in the lungs of the fetal lamb is reported to fall in the final days of gestation and during labour itself. We aimed to test the hypothesis that this fall in liquid volume adapts the lungs for air breathing and pulmonary gas exchange. 2. In twelve chronically catheterized fetal lambs we measured lung liquid volume at 140 days gestatio
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12. Aquaporin-1 water channel protein in lung: ontogeny, steroid-induced expression, and distribution in rat.
At birth water is rapidly reabsorbed from the distal lung in preparation for alveolar gas exchange. To investigate a potential role for the AQP1 water channel in development, lung membranes from fetal and perinatal rats were analyzed by immunoblot. First expression of AQP1 was noted in fetal rat lung at E19 (19th day of the 21-day gestation). The level of AQ