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Influência da atmosfera gasosa e da fonte protéica sobre o desenvolvimento embrionário in vitro e taxa de prenhez em bovinos
(Universidade Federal de Santa Maria, 2006-05-18)
The embryonic development and pregnancy rates are influenced by
variations in embryo in vitro production (IVP) systems and protocols for bovine
embryos, such as gaseous atmosphere, culture media and the protein supply
adopted ...
Caracterização de um novo modelo de maturação de oócito in vitro e participação do mTOR na ovulação em bovinos
(Universidade Federal de Santa Maria, 2016-02-26)
In the first study, we characterized an in vitro culture system able to delaying meiosis resumption of bovine oocytes. Firstly, we demonstrated that the use of an EGFR inhibitor (AG1478; 5μM) in a culture system with ...
Ácido ascórbico na produção in vitro de embriões bovinos
(Universidade Federal de Santa Maria, 2008-11-17)
In vitro cultured bovine embryos are susceptible to oxidative stress caused by
high oxygen concentration, that contributes to free radicals formation. Therefore,
antioxidant defense systems are needed to neutralize the ...
Eixo ECA2/ANG-(1-7)/mas e sua regulação no processo de ovulação
(Universidade Federal de Santa Maria, 2011-02-28)
The Renin-Angiotensin System (RAS) has been associated with various reproductive
functions, including the ovulatory cascade. Unlike angiotensin II (AngII), the role of
angiotensin-(1-7) [Ang-(1-7)] has not been characterized ...
Análise bacteriológica, citológica e histopatológica do trato reprodutivo de vacas de abate
(Universidade Federal de Santa Maria, 2016-07-29)
Reproductive diseases, mainly endometritis, are important hurdles in cattle raising, In the current study we evaluated gross, bacteriological, cytological, and histological findings from selected sites of the genital from ...
Injeção intracitoplasmática de espermatozoide: métodos de ativação oocitária e desestabilização da membrana espermática
(Universidade Federal de Santa Maria, 2017-02-09)
Development of bovine embryos produced by intracytoplasmic sperm injection (ICSI) is low compared to fertilized embryos. Deficient oocyte activation, inappropriate sperm capacitation, and lack of sperm decondensation are ...
Angiotensina II e sua associação com fator-I de crescimento semelhante à insulina, insulina e células foliculares na maturação de oócitos bovinos e conseqüente desenvolvimento embrionário
(Universidade Federal de Santa Maria, 2005-05-06)
The aim of the present study was to evaluate the action of angiotensin II (Ang II), insulin-like growth factor-I (IGF-I) and insulin (Ins) on bovine oocyte nuclear and cytoplasmic maturation with follicular cells. ...
Citologia aspirativa por agulha fina como método diagnóstico precoce em enfermidades em medicina veterinária
(Universidade Federal de Santa Maria, 2016-04-04)
Fine-needle aspiration cytology is an easy, rapid, low cost, and minimally invasive
technique, consequently contributes to a faster diagnosis leading to a faster decision,
mainly to provide welfare and quality of life ...
Ácidos graxos não esterificados (NEFAs) e beta-hidroxibutirato (BHBA) na regulação da foliculogênese e epigenética das células endometriais
(Universidade Federal de Santa Maria, 2020-02-10)
Dairy cows milk production has increased over the past decades as a result of intense genetic
selection. However, the advances in genetic selection of dairy herds did not come with an
improvement of reproductive parameters. ...
Rotas de sinalização na divergência folicular e luteólise em bovinos
(Universidade Federal de Santa Maria, 2014-09-12)
It is well established that locally produced factors exert pivotal roles during dominant follicle selection, oocyte maturation, ovulation and luteolysis. However, the identification of these factors and pathways involved ...