Results 171 to 180 of about 14,257 (219)

Identification of Arginase in Human Placental Villi

Placenta, 2007
l-Arginine is the common substrate for arginase and nitric oxide synthase (NOS). Arginase converts l-arginine to urea and ornithine, which is the principal precursor for production of polyamines required for cell proliferation. Human placenta expresses endothelial NOS (eNOS) in syncytiotrophoblasts, but the expression of arginase has not been fully ...
T, Ishikawa, T, Harada, H, Koi, T, Kubota, H, Azuma, T, Aso   +5 more
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Angiogenic Response of Placental Villi to Heparin

Obstetrics & Gynecology, 2011
To estimate the angiogenic effect of heparin on human umbilical vein endothelial cells cultured in conditioned media from normal and severely pre-eclamptic human placental villi.Normal first- and second-trimester floating placental villi were explanted in control conditions and increasing concentrations of heparin (unfractionated and low molecular ...
Mara L, Sobel, John, Kingdom, Sascha, Drewlo   +2 more
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Fetal vasculogenesis and angiogenesis in human placental villi

Placenta, 1989
Placental villi of 5 exactly defined early human specimens ranging from day 21 post conception (p.c.) until day 42 p.c. and from an additional 43 specimens from about 5 to 40 weeks menstrual age have been analyzed ultrastructurally with regard to fetal vasculogenesis and angiogenesis. The following results were obtained: The first cells differentiating
R, Demir, P, Kaufmann, M, Castellucci, T, Erbengi, A, Kotowski   +4 more
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The fetal vascularisation of term human placental villi

Anatomy and Embryology, 1985
Vessel arrangement and vessel structure of the intermediate and terminal villi of 50 human normal term placentas have been studied by means of semithin histology, three-dimensional reconstruction of serial sections as well as scanning electron microscopy of vessel casts.
P, Kaufmann, U, Bruns, R, Leiser, M, Luckhardt, E, Winterhager   +4 more
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Branching morphogenesis during development of placental villi

Differentiation, 2006
The placenta forms a complex interface between the mother and fetus during development that is designed for efficient nutrient exchange. A large surface area is created by extensive branching morphogenesis of the trophoblast-derived epithelium to create a villous network, called the labyrinth in rodents.
Cross, James C., Nakano, Haruo, Natale, David R. C., Simmons, David G., Watson, Erica D.   +4 more
openaire   +5 more sources

Viability of the human placental villi in organ culture

Archives of Gynecology, 1984
The viability of the placental villi in organ culture was investigated both from the morphological and functional points of view. Morphological viability was judged on the appearance of the villi with special emphasis on the trophoblastic cells and the morphological integrity of the placental villi could be maintained for at least 96 h in organ culture.
M, Ogino, M, Satoh, K, Kinoshita, K, Satoh, M, Mizuno, S, Sakamoto   +5 more
openaire   +2 more sources

Morphological Characteristics of the Terminal Villi in Placental Failure

Bulletin of Experimental Biology and Medicine, 2013
A comparative morphological study of the placentas in spontaneous and induced pregnancy aggravated by placental failure was carried out. Placental failure manifested by shrinkage of the terminal villi, lesser number and section areas of their capillaries, and higher expression of vascular endothelium growth factor and endothelial NO synthase in the ...
E A, Dubova, F B, Buranova, T A, Fyodorova, A I, Shchyogolev, G T, Sukhikh   +4 more
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Markers of Oxidative Stress in Placental Villi Exposed to Ethanol

Journal of the Society for Gynecologic Investigation, 2004
Ethanol exposure during pregnancy may result in fetal alcohol syndrome (FAS). The mechanism by which this occurs is unknown. Recent studies in several organ systems, including the placenta, suggest that oxidative stress is involved. In this study we investigated the presence and levels of three oxidative stress markers in placental villous tissue ...
Helen H, Kay, Stephen, Tsoi, Kreg, Grindle, Ronald R, Magness   +3 more
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The organization of actin filaments in human placental villi

Journal of Ultrastructure Research, 1983
The surface of the syncytial trophoblast of the human placenta is covered by a microvillous (brush) border that is in direct contact with maternal blood. Because of this location, it is the site of a variety of transport, enzymatic and receptor activities vital to many placental functions.
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Androgen receptor in human placental villi.

Journal of biochemistry, 1981
In studies with a synthetic androgen, R 1881, an androgen-binding component was found in the cytosol of human placental villi. Kinetic analysis indicated that the Kd value of this component was 1.4 nM at 0-4 degrees C and that binding of R 1881 amounted to 277 +/- 73 fmol/mg protein.
K, Hirota, T, Gomi, R, Kishimoto, M, Iguchi, K, Hayakawa, H, Nakagawa   +5 more
openaire   +2 more sources