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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1991-9-27
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pubmed:abstractText |
In the present study, increasing amounts of the anti-estrogen 1-(p-2-diethylaminoethoxyphenyl)-1-phenyl-2-p-methoxyphenoletha nol (MER-25) were administered to pregnant baboons (Papio anubis) to block the action of endogenous estrogen and to determine effect on placental low-density lipoprotein (LDL) uptake. Pregnant baboons were untreated (n = 8) or received MER-25 orally at a dosage of 25 (n = 10), 50 (n = 8), or 75 (n = 4) mg/kg BW daily on Days 140-170 of gestation (term = 184 days). Placentas were removed on Day 170 of gestation and villous tissue was dispersed with 0.1% collagenase. Placental cells (10(6] were incubated in Medium 199 for 12 h at 37 degrees C with increasing amounts of 125I-LDL, with or without a 100-fold excess of unlabeled baboon LDL. Mean (+/- SEM) placental uptake (ng/micrograms cell protein) of 125I-LDL was 55% (6.4 +/- 1.0), 75% (3.6 +/- 0.7), and 81% (2.7 +/- 0.2) lower (p less than 0.001) in baboons that received MER-25 in doses of 25, 50, and 75 mg/kg BW, respectively, than in untreated baboons (14.2 +/- 1.3 ng/micrograms cell protein). Maximal effect occurred with 50 mg MER-25, because LDL uptake was not further decreased with greater levels of MER-25. Dissociation constants for placental LDL uptake, as determined by Scatchard analysis, were unaltered by anti-estrogen treatment. The amount of 125I-LDL degradation by placental cells of untreated and MER-25-treated baboons was proportional to LDL uptake.(ABSTRACT TRUNCATED AT 250 WORDS)
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Estrogens,
http://linkedlifedata.com/resource/pubmed/chemical/Ethamoxytriphetol,
http://linkedlifedata.com/resource/pubmed/chemical/Iodine Radioisotopes,
http://linkedlifedata.com/resource/pubmed/chemical/Lipoproteins, LDL,
http://linkedlifedata.com/resource/pubmed/chemical/Progesterone,
http://linkedlifedata.com/resource/pubmed/chemical/Receptors, LDL
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pubmed:status |
MEDLINE
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pubmed:month |
Jul
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pubmed:issn |
0006-3363
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
45
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
43-8
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:1878435-Animals,
pubmed-meshheading:1878435-Dose-Response Relationship, Drug,
pubmed-meshheading:1878435-Estrogens,
pubmed-meshheading:1878435-Ethamoxytriphetol,
pubmed-meshheading:1878435-Female,
pubmed-meshheading:1878435-Iodine Radioisotopes,
pubmed-meshheading:1878435-Lipoproteins, LDL,
pubmed-meshheading:1878435-Papio,
pubmed-meshheading:1878435-Placenta,
pubmed-meshheading:1878435-Pregnancy,
pubmed-meshheading:1878435-Progesterone,
pubmed-meshheading:1878435-Receptors, LDL
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pubmed:year |
1991
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pubmed:articleTitle |
Regulation of placental low-density lipoprotein uptake in baboons by estrogen: dose-dependent effects of the anti-estrogen ethamoxytriphetol (MER-25).
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pubmed:affiliation |
Department of Obstetrics/Gynecology, University of Maryland School of Medicine, Baltimore 21201.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.
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