Evaluation of the contribution of the placentomal fusion during gestation in cattle

Rici, Rose Elí Grassi; Facciotti, Patricia Reginato; Maria, Durvanei Augusto; Fernandes, Viviane Mendes; Ambrósio, Carlos Eduardo; Miglino, María Angélica

doi:10.1016/j.anireprosci.2011.06.004

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…In the ewe, the caruncle encapsulates the cotyledon whereas the cotyledon encapsulates the caruncle in the bovine. Furthermore, it is known that the morphological features of adjacent placentomes from sheep and cattle differ during the last trimester (Rici et al, ). In sheep, single placentomes are distinct during the last third of gestation, while in cattle it appears that there is some degree of fusion between multiple adjacent placentomes.…”

Section: Discussionmentioning

confidence: 99%

“…In sheep, single placentomes are distinct during the last third of gestation, while in cattle it appears that there is some degree of fusion between multiple adjacent placentomes. This fusion appears to be exclusively of fetal origin, as adjacent caruncles are distinctly separate (Rici et al, ). The impact that these differences in placentomal morphology might have on the mechanisms of placentomal separation is unknown.…”

Section: Discussionmentioning

confidence: 99%

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The plasminogen activator system in the ovine placentome during late gestation and stage‐two of parturition

McNeel

Cushman

Vallet

2013

Molecular Reproduction Devel

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The process of placental separation is not completely understood. In domestic animals, especially cattle, it is important that expulsion of the fetal membranes takes place in a timely manner in order to achieve maximal reproductive efficiency. The activity of the matrix-metalloprotease (MMP) family of proteases is known to be reduced in placentomes from cases of retained placenta. Members of the MMP family are known to be activated by the plasminogen activator (PA) family of proteases. We hypothesized that the expression and activity of the PA family increase in the cotyledon and/or caruncle as parturition approaches, with maximal expression and activity at parturition. To test this hypothesis, we performed reverse-transcriptase quantitative PCR and plasminogen-casein zymography to detect the presence and activity of PA family members in the placentome leading up to and during parturition in spontaneous and dexamethasone-induced parturient ewes. The results from our experiments indicated that serine proteases inhibitor E1 (SERPINE1) mRNA abundance in the cotyledon was different between treatment groups (P = 0.0002). In the caruncle, gene expression for plasminogen activator urokinase-type (PLAU) was different (P = 0.0154), and there was a strong trend for differences in SERPINE1 expression (P = 0.0565). These results demonstrate that expression of the PA system in the placentome changes from late pregnancy to parturition, and the presence or activity of these enzymes may occur after fetal expulsion.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The plasminogen activator system in the ovine placentome during late gestation and stage‐two of parturition

McNeel

Cushman

Vallet

2013

Molecular Reproduction Devel

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ECM proteins involved in cell migration and vessel formation compromise bovine cloned placentation

et al. 2022

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İvesi Irkı Koyunlarda Yavru Sayısına Göre Amniyon Sıvısındaki Biyokimyasal Değişikliklerin Belirlenmesi.

Akkuş

YAPRAKCI

2022

BAUN Sağ Bil Derg

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Fetal fluids, which are important in feto-maternal homeostasis, may be affected by the number of developing fetuses, and these effects can be evaluated by measuring some biochemical markers. Aim: The present study was carried out to investigate the difference in metabolic needs between twin and singleton pregnancies by looking at some biochemical and hormonal markers in the amniotic fluid taken at the time of birth in Awassi sheep. Materials and Methods: A total of 30 Awassi sheep were used in the study. Sheep were divided into 2 groups according to the number of offsprings by ultrasonography. The first group of the study (Group 1, n=15); ewes carrying one offspring included the second group of the study (Group 2, n=15); created sheep carrying two offsprings. From the sheep in both study groups; 10 ml of amniotic fluid was taken with a sterile syringe without disturbing the integrity of the amniotic sac hanging from the lips of the vulva at the time of delivery. Electrolyte (sodium, potassium, chlorine, calcium, phosphorus), total protein, glucose, liver (ALT and AST), kidney biomarkers (urea and keratinin) and cortisol levels were measured from the amniotic fluid. Obtained data were analyzed with independent samples t-test (Independent Sample T-test). Results: In the amniotic fluid; glucose and cortisol levels were significantly higher in the twin pregnant group than in the singleton pregnant group (p

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Evaluation of the contribution of the placentomal fusion during gestation in cattle

Cited by 3 publications

References 15 publications

The plasminogen activator system in the ovine placentome during late gestation and stage‐two of parturition

The plasminogen activator system in the ovine placentome during late gestation and stage‐two of parturition

ECM proteins involved in cell migration and vessel formation compromise bovine cloned placentation

İvesi Irkı Koyunlarda Yavru Sayısına Göre Amniyon Sıvısındaki Biyokimyasal Değişikliklerin Belirlenmesi.

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