2024-03-28T22:59:05Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/108142021-03-18T16:54:34Zcom_10261_63com_10261_6col_10261_316
Plasmatic profiles of pregnancy-associated glycoprotein and progesterone levels during gestation in Churra and Merino sheep
Ranilla, María José
Sulon, J.
Carro Travieso, Mª Dolores
Mantecón, Ángel R.
Beckers, J. F.
Pregnancy-associated glycoprotein (PAG)
Progesterone
Gestation profile
Sheep
3 figures, 1 table.-- PMID: 16727560 [PubMed].
This study was carried out to determine ovine pregnancy-associated glycoprotein (oPAG) and progesterone (P4) levels in the serum of Churra and Merino ewes throughout gestation and the first month post partum. The oPAG levels were determined with an heterologus RIA using bovine PAG as standard and tracer and rabbit antiserum against oPAG, sensitivity was 4.0 ng/ml. The P4 levels were measured with a radioimmunological procedure, including a specific extraction step with petroleum ether (bp 60–80°C) with a sensitivity of less than 0.1 ng/ml. There were no differences (P<0.10) in the oPAG profile between breeds from Weeks 1 to 18. From Week 18 to lambing, oPAG concentrations increased rapidly in Churra ewes (on average, from 250 to 650 ng/ml) while remaining relatively constant in the Merino ewes (around 250 ng/ml). No significant differences (P>0.05) were observed for mean weekly P4 levels between the 2 breeds. In both breeds, P4 increased throughout the whole length of gestation, with the highest level measured at Weeks 19–20, then declined 2 wk before parturition. No correlation was found between P4 and oPAG concentrations during gestation in either of the breeds. After lambing, oPAG and P4 levels decreased rapidly in 4 wk to basal values. In both breeds the oPAG concentrations at Weeks 19, 20 and 21 of gestation in ewes carrying male fetuses were higher than in those carrying female fetuses. From the results, we conclude that the breed and sex of the fetus could influence the production of oPAG.
The part of this work that was carried out at Liege University was supported by grants
from IRSIA and FRSM. M. J. Ranilla gratefully acknowledges receipt of a scholarship from the Ministerio de Education y Ciencia (MEC).
Peer reviewed
2009-02-19T10:04:30Z
2009-02-19T10:04:30Z
1994
artículo
http://purl.org/coar/resource_type/c_6501
Theriogenology 42(3): 537-545 (1994)
0093-691X
http://hdl.handle.net/10261/10814
10.1016/0093-691X(94)90691-B
en
http://dx.doi.org/10.1016/0093-691X(94)90691-B
none
94510 bytes
application/pdf
Elsevier