Prostaglandin F2 Alpha
Mostrando 1-12 de 159 artigos, teses e dissertações.
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1. Indução de codominância e dupla ovulação e novas abordagens em luteólise de bovinos / Induced codominance and double ovulation and new approaches on luteolysis in cattle
The day-4 ablation model for increasing the incidence of double ovulations in heifers was used for the chapters 2 and 3. In this regard, follicles ≥ 5 mm were ablated at 4 d post-ovulation to induce a prominent FSH surge and a new follicular wave, and two injections of prostaglandin F2α (12 h apart) were given two days later (6 d) to favor ovulati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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2. Diagnóstico ultra-sonográfico do momento ovulatório em búfalas (Bubalus bubalis) inseminadas no estro espontâneo e induzido / Ultrasonographical diagnosis of ovulation in buffaloes (Bubalus bubalis) inseminated in spontaneous and induced oestrus
O objetivo deste experimento foi determinar o intervalo entre o início do estro induzido ou espontâneo e a ovulação em fêmeas bubalinas (Bubalus bubalis) com o auxílio da ultra-sonografia, o que permitirá a determinação de um horário mais apropriado para a I.A. pré-fixada. Nos meses de março a junho, outono no sul do Brasil (época reprodutiva do
Publicado em: 2010
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3. Prostaglandina F2 alfa associada à ocitocina ou carbetocina na indução de partos em suínos / Prostaglandin f2 alpha associated with oxytocin or carbetocin in induction on parturition in swines
O presente estudo teve como objetivo avaliar a aplicação de análogo sintético da prostaglandina F2 (PGF2 ) associado à carbetocina ou ocitocina sobre a eficiência na indução ao parto em suínos. Foram analisados o tempo entre aplicação e início do trabalho de parto, duração do parto e percentual de natimortalidade. A indução do parto foi reali
Publicado em: 2009
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4. Antiluteolytic activity in the uterine microenvironment during the critic period to pregnancy establishment in bovines / Atividade antiluteolítica no microambiente uterino durante o período crítico para o estabelecimento da gestação em bovinos
The inhibition of pulsatile secretion of PGF2α mediated by interferon-tau (IFN) is fundamental on the maternal recognition of pregnancy, maintaining the progesterone secretion by corpus luteum. Therefore the measurement of interferon activity in the uterine microenvironment was studied. Due to a lack of assays those measure specific antiluteolytic capa
Publicado em: 2006
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5. RANK, RANKL and osteoprotegerin in arthritic bone loss
Rheumatoid arthritis is characterized by the presence of inflammatory synovitis and destruction of joint cartilage and bone. Tissue proteinases released by synovia, chondrocytes and pannus can cause cartilage destruction and cytokine-activated osteoclasts have been implicated in bone erosions. Rheumatoid arthritis synovial tissues produce a variety of cytoki
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-02
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6. Protective effect of N-acetylcysteine against oxygen radical-mediated coronary artery injury
The present study investigated the protective effect of N-acetylcysteine (NAC) against oxygen radical-mediated coronary artery injury. Vascular contraction and relaxation were determined in canine coronary arteries immersed in Kreb's solution (95% O2-5% CO2), incubated or not with NAC (10 mM), and exposed to free radicals (FR) generated by xanthine oxidase (
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-08
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7. Ionic radiocontrast inhibits endothelium-dependent vasodilation of the canine renal artery in vitro: possible mechanism of renal failure following contrast medium infusion
To determine if radiocontrast impairs vascular relaxation of the renal artery, segments (4-5 mm in length) of canine renal artery were suspended in vitro in organ chambers to measure isometric force (95% O2/5% CO2, at 37ºC). Arterial segments with and without endothelium were placed at the optimal point of their length-tension relation and incubated with 10
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-02
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8. 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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9. 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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10. Sincronização da ovulação com dispositivo intravaginal de progesterona (CIDR®) em novilhas Bos indicus, Bos indicus x Bos taurus e Bos taurus / Synchronization of ovulation with intravaginal progesterone device in Bos indicus, Bos indicus x Bos taurus and Bos taurus heifers
This study evaluated the effect of treatment with progesterone intravaginal device (CIDR®) associated to estradiol benzoate (BE) and prostaglandin F2α in the follicular dynamic of B. indicus (Nelore and Gir), B. taurus (Angus and BWH) and respectively cross-breed. Aiming to evaluate the effect of different plasmatic progesterone concentration (P4)
Publicado em: 2004
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11. Effect of arginine vasopressin on the canine epicardial coronary artery: experiments on V1-receptor-mediated production of nitric oxide
OBJECTIVE: To determine whether arginine vasopressin releases endothelium-derived nitric oxide (EDNO) from the epicardial coronary artery. METHODS: We studied segments of canine left circumflex coronary arteries suspended in organ chambers to measure isometric force. The coronary artery segments were contracted with prostaglandin F2alpha (2 x 10-6M) and expo
Arquivos Brasileiros de Cardiologia. Publicado em: 2003-05
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12. Localisation of prostaglandin F2 alpha and E2 binding sites in the human eye.
Prostaglandin F2 alpha reduces intraocular pressure possibly by increasing uveoscleral outflow. To further understand the mechanism of its action binding sites for prostaglandin F2 alpha and, for comparison, prostaglandin E2 were localised in sections of human cadaveric eyes using an in vitro ligand-binding technique and autoradiography. Specific binding sit