Article (Scientific journals)
Ultrasound fetal measurements and pregnancy associated glycoprotein secretion in early pregnancy in cattle recipients carrying somatic clones
Chavatte-Palmer, P.; Melo de Sousa, Noelita; Laigre, P. et al.
2006In Theriogenology, 66 (4), p. 829-840
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Keywords :
cloning; LOS; ultrasound; PAG; bovine
Abstract :
[en] Somatic cloning in the bovine species leads to high levels of fetal losses which occur throughout pregnancy. These losses are most often associated with fetal overgrowth, a syndrome known as large offspring syndrome (LOS), and excessive maternal plasma pregnancy serum protein 60 (PSP60), a protein similar to a pregnancy-associated glycoprotein of 67 kDa (PAG 167) produced by the bovine placenta. Predicting the outcome of pregnancies initiated from cloned embryos has become an important issue both to prevent potential harm to the mother because of excessive fetal size at birth and also to get a better understanding of the relationships between growth, differentiation and placental functions in developing cloned fetuses. Here, we report on a systematic analysis of fetal and placental development in the first trimester of pregnancy performed by ultrasonographic imaging and by measurement of the maternal concentrations of pregnancy associated glycoproteins (PAGS), using four different radioimmunoassays (RIA) (two homologous RIA systems with PSP60 and PAG 167; two heterologous RIA systems with PAG 167 as standard and tracer, and antisera anti-caprine PAGs). We showed that crown-rump length (CRL) in clones appeared smaller than controls at 35, 50 and 62 days (P < 0.05). At 62 days of pregnancy, CRL in cloned fetuses that died before 90 days was smaller compared to the other cloned fetuses (P < 0.05) whereas the width of the fetal sack and the biparietal diameter (BPD) was larger in fetuses that developed LOS in late gestation (P < 0.05). Maternal PAGs concentrations were statistically different between controls and all clone recipients as early as Day 34, suggesting early abnormal placental glycoprotein synthesis for clone pregnancies regardless of pregnancy outcome. This work provides a practical, non-invasive tool to follow up clone pregnancies and suggests that primary growth retardation and abnormal placental function precedes excessive fetal and placental growth at later stages of pregnancy. (c) 2006 Elsevier Inc. All rights reserved.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Chavatte-Palmer, P.
Melo de Sousa, Noelita ;  Université de Liège - ULiège > Département de sciences fonctionnelles > Physiologie de la reproduction
Laigre, P.
Camous, S.
Ponter, A. A.
Beckers, Jean-François  ;  Université de Liège - ULiège > Département de sciences fonctionnelles > Physiologie de la reproduction
Heyman, Y.
Language :
English
Title :
Ultrasound fetal measurements and pregnancy associated glycoprotein secretion in early pregnancy in cattle recipients carrying somatic clones
Publication date :
2006
Journal title :
Theriogenology
ISSN :
0093-691X
eISSN :
1879-3231
Publisher :
Elsevier, New York, United States - New York
Volume :
66
Issue :
4
Pages :
829-840
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 March 2009

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