Bovine Endometrium
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Aspects of embryo-maternal communication in establishment of pregnancy in cattle
Abstract Establishment of pregnancy in mammals requires reciprocal molecular communication between the conceptus and endometrium that modifies the endometrial transcriptome and uterine luminal milieu to support pregnancy. Due to the small size of the early embryo and elongating conceptus relative to the volume of the uterine lumen, collection of endometrium
Anim. Reprod.. Publicado em: 28/11/2019
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2. Histological and BMP and Wnt gene expression evaluation in the bovine endometrium during embryo implantation / Avaliação histologica e da expressão genica de BMP e Wnt no endometrio durante a implantação embrionaria em bovinos
A implantação embrionária implica em alterações profundas do ambiente uterino, cujos eventos devem obedecer uma sincronia temporal e espacial com o estágio do desenvolvimento embrionário. Qualquer desequilíbrio nesta sincronia resulta em interrupção da gestação e o desconhecimento dos mecanismos que atuam nas interações materno-fetais inviabili
Publicado em: 2009
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3. Hepatic function and lipid profile assessment in puerperal and post-puerperal periods and their relationship with reproductive disorders in Holstein cows raised in the State of São Paulo / Avaliação da função hepática e do lipidograma no período puerperal e pós-puerperal e suas inter-relações com os distúrbios reprodutivos de fêmeas bovinas da raça Holandesa, criadas no Estado de São Paulo
Aiming to assess the influence of physiological puerperium and post-puerperal phase on the hepatic function and lipid profile of health cows, as well as to assess their connection with some reproductive disorders of early puerperium (Acute postpartum endometritis and placental retention); late puerperium (genital catarrhal discharges level I and II, and leve
Publicado em: 2005
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4. Role of estradiol on bovine luteolysis: estradiol stimulates PGF2&alpha througthout P4 receptor activation in the endometrium? / As funções do estradiol no processo da luteólise em bovinos: o estradiol estimula PGF2α através da ativação de receptores de P4 no endométrio?
Estradiol (E2) is essential for triggering luteolysis in ruminants. The low E2 concentrations after follicular ablation prolongs luteolysis instead of E2 injections in late luteal phase stimulate prostaglandin F2α (PGF2α) and luteolysis. The E2 could act in endometrium avoiding progesterone (P4 ) to stimulate PGF 2α secretion. A P4 antagoni
Publicado em: 2004
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5. Endocrine and molecular mechanisms by which estradiol stimulates endometrial prostaglandin F2α synthesis in the cow / Mecanismos endócrinos e moleculares pelos quais o estradiol estimula a síntese de prostaglandina F2α no endometrial em fêmeas bovinas
Estradiol (E2) is required for luteolysis in bovine female and E2 injections stimulate prostaglandin F2α (PGF2α) release. It is possible that E2 stimulates synthesis and/or activity of molecules in the cascade of PGF2α production, such as enzymes and receptors to other ligands. Calcium is a known cofactor for protein kinase C and phospholip
Publicado em: 2004
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6. Development of the placenton in water buffalo (Bubalus bubalis bubalis Linnaeus, 1758) / Desenvolvimento do placentônio em búfalos (Bubalus bubalis bubalisLinnaeus, 1758)
The ruminant placenta has an uniform gross structure based on specialized areas of feto-maternal membrane apposition and proliferation: the placentons. By exerting a fundamental role for the development of the pregnancy, these structures have been very well studied in several domestic species of commercial interest. Particularly in the buffalo, however, ther
Publicado em: 2000
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7. Molecular cloning and spatio-temporal expression of the prostaglandin transporter: A basis for the action of prostaglandins in the bovine reproductive system
Prostaglandins (PGs) play important roles in mammalian reproductive function through autocrine, paracrine, and endocrine actions. However, they predominate as charged anions and diffuse poorly across the plasma membrane. Recently, a PG transporter (PGT) has been found to mediate PG transport across cell membranes. In ruminants, endometrial PGs are transporte
National Academy of Sciences.
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8. The effects of estrogen, its antagonist ICI 182, 780, and interferon-tau on the expression of estrogen receptors and integrin alphaV beta 3 on cycle day 16 in bovine endometrium
We have shown previously that downregulation of intercaruncular stromal integrin αvβ3 in bovine endometrium on day 16 of the estrous cycle coincided with the antibody recognition of estrogen receptors (ER) in the luminal epithelium. In pregnancy, these changes were not observed. Our hypothesis was that on day 16 of the estrous cycle, estrogen from the domi
BioMed Central.
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9. Effects of the estrous cycle, pregnancy and interferon tau on expression of cyclooxygenase two (COX-2) in ovine endometrium
In sheep, the uterus produces luteolytic pulses of prostaglandin F2α (PGF) on Days 15 to 16 of estrous cycle to regress the corpus luteum (CL). These PGF pulses are produced by the endometrial lumenal epithelium (LE) and superficial ductal glandular epithelium (sGE) in response to binding of pituitary and/or luteal oxytocin to oxytocin receptors (OTR) and l
BioMed Central.
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10. Identification of the major pregnancy-specific antigens of cattle and sheep as inactive members of the aspartic proteinase family.
Pregnancy in cattle and sheep can be diagnosed by the presence of a conceptus-derived antigen in maternal serum that is secreted by trophoblast and placental tissue primarily as an acidic component of Mr 67,000. Molecular cloning of its cDNA reveals that the antigen belongs to the aspartic proteinase family and has greater than 50% amino acid sequence identi
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11. Ureaplasma diversum infection in vitro alters prostaglandin E2 and prostaglandin F2a production by bovine endometrial cells without affecting cell viability.
Bovine epithelial and stromal cells of the endometrium were inoculated with Ureaplasma diversum, pathogenic strain 2312, at 10(6) or 10(3) color-changing units (ccu)/ml in the presence of 1% fetal bovine serum (depleted of steroids by dextran-charcoal treatment) to assess the effect of infection on prostaglandin biosynthesis. When the inoculum of U. diversum
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12. The diversity and evolutionary relationships of the pregnancy-associated glycoproteins, an aspartic proteinase subfamily consisting of many trophoblast-expressed genes
The pregnancy-associated glycoproteins (PAGs) are structurally related to the pepsins, thought to be restricted to the hooved (ungulate) mammals and characterized by being expressed specifically in the outer epithelial cell layer (chorion/trophectoderm) of the placenta. At least some PAGs are catalytically inactive as proteinases, although each appears to po
The National Academy of Sciences of the USA.