Document Detail

Expression profile and protein levels of placental products as indirect measures of placental function in in vitro-derived bovine pregnancies.
MedLine Citation:
PMID:  16388019     Owner:  NLM     Status:  MEDLINE    
Bovine conceptus development and its association with placental proteins present in maternal, foetal and neonatal plasma and foetal (amniotic and allantoic) fluids were investigated in in vivo- and in vitro-produced (IVP) concepti and newborn calves. Females were superovulated to obtain control embryos, whereas IVP embryos were derived from established in vitro procedures. Pregnant animals were slaughtered on days 90 or 180 of gestation or allowed to develop to term for the assessment of physical traits. Foetal, maternal and neonatal blood and foetal fluids were collected for the determination of bovine placental lactogen (bPL) and bovine pregnancy-specific protein B (bPSPB) concentrations. Placental transcripts for bPL and bPSPB, determined by quantitative RT-PCR, were elevated in IVP placentomes. No major physical differences were observed between groups on day 90, but concentrations of bPL and bPSPB were higher in foetal plasma and allantoic fluid of IVP concepti in day 180 pregnancies, which were correlated with larger uterine and conceptus traits. Maternal concentrations of bPL in IVP pregnancies were lower than controls during the last 8 weeks of gestation, to become similar as parturition approached. Newborn IVP calves and foetal membranes were larger and displayed higher concentrations of plasma bPL than controls (10 and 60 min after birth). Our results indicated that differential patterns of secretion of bPL and bPSPB into the maternal and foetal systems occurred at distinct stages of gestation, and these were associated with altered conceptus development after in vitro embryo manipulations, indirectly demonstrating deviations in placental function in IVP pregnancies.
Marcelo Bertolini; Charles R Wallace; Gary B Anderson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Reproduction (Cambridge, England)     Volume:  131     ISSN:  1470-1626     ISO Abbreviation:  Reproduction     Publication Date:  2006 Jan 
Date Detail:
Created Date:  2006-01-02     Completed Date:  2006-07-03     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  100966036     Medline TA:  Reproduction     Country:  England    
Other Details:
Languages:  eng     Pagination:  163-73     Citation Subset:  IM    
Department of Animal Science, University of California, Davis, 95616, USA.
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MeSH Terms
Allantoin / chemistry
Amnion / chemistry
Animals, Newborn
Aspartic Acid Endopeptidases / analysis,  blood
Cattle / metabolism*
Embryo Transfer
Fertilization in Vitro*
Gene Expression
Gene Expression Profiling
Gestational Age
Oligonucleotide Array Sequence Analysis
Placenta / metabolism*
Placental Hormones / analysis*,  genetics
Placental Lactogen / analysis,  blood
Pregnancy Proteins / analysis,  blood
Pregnancy, Animal / metabolism*
Reg. No./Substance:
0/Placental Hormones; 0/Pregnancy Proteins; 9035-54-5/Placental Lactogen; 97-59-6/Allantoin; EC 3.4.23.-/Aspartic Acid Endopeptidases; EC 3.4.23.-/pregnancy-associated glycoprotein 1

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