Human Embryos
Mostrando 13-24 de 445 artigos, teses e dissertações.
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13. Expression of Msx1 and Dlx1 during Dumbo rat head development: correlation with morphological features
The Dumbo rat possesses some characteristics that evoke several human syndromes, such as Treacher-Collins: shortness of the maxillary, zygomatic and mandibular bones, and low position of the ears. Knowing that many homeobox genes are candidates in craniofacial development, we investigated the involvement of the Msx1 and Dlx1 genes in the Dumbo phenotype with
Genetics and Molecular Biology. Publicado em: 01/05/2009
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14. Análise ético-constitucional da utilização de embriões humanos em experimentos científicos.
This work aims to carry out an analysis ethics and legal about the constitutionality of the use of human embryos produced in vitro in scientific experiments. The doctrine about the subject is scarce and it appears quite divided. For someone there would not be any ethical or legal problem in the use of human embryos in such experiments although these would no
Publicado em: 2009
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15. Morphological differences in human zygotes and embryos cultured in different media / Efeito de quatro diferentes meios de cultura na qualidade morfologica de zigotos e embriões
Objective: compare the effects of four different culture media on the quality of zygotes and embryos. Methods: This retrospective study, performed at the Center for Human Reproduction of Campinas-Brazil analyzed 2289 embryos were assessed from September 2006 to September 2008. Long protocol was used for ovarian stimulation in all cases. The oocytes of each p
Publicado em: 2009
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16. Ativação de genes apoptóticos no bloqueio do desenvolvimento em embriões bovinos / Activation of apoptotic genes at developmental block in bovine embryo development
Maternal-zygotic transition is a complex phenomenon characterized by the initiation of transcription in the embryo and the transition of maternal mRNA with embryonic mRNA. It is believed that the mRNAs and proteins synthethized by the oocyte during its growth and final maturation allow the zygote to develop during the early stages of embryo development up to
Publicado em: 2009
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17. Análise da variação da concentração de amônia, dos aminoácidos alanina e glutamina e do dipeptídeo alanil-glutamina no meio de cultura de embriões humanos e os efeitos na reprodução assistida / Analysis of the variation of the concentrations of ammonium, alanine, glutamine, and alanyl-glutamine in culture medium of human embryos and the effects on assisted reproduction / Analysis of the variation of the concentrations of ammonium, alanine, glutamine, and alanyl-glutamine in culture medium of human embryos and the effects on assisted reproduction / Análise da variação da concentração de amônia, dos aminoácidos alanina e glutamina e do dipeptídeo alanil-glutamina no meio de cultura de embriões humanos e os efeitos na reprodução assistida
Objective: to verify the relations between culture media concentrations of ammonia, alanine, glutamine, and alanyl-glutamine and embryo quality, pregnancy, and type of hormonal stimulation. Methods: a prospective case-control study was carried out including 62 embryos from 20 women submitted to assisted reproduction at the Sao Paulo Federal University. Inclu
Publicado em: 2009
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18. Analise do padrão de metilação da região promotora do gene humano PAX9 (-947 - +251) e analise in vitro da sua atividade transcricional / New insights into methylation pattern and transcriptional activity of human PAX9 gene (-947 - +251) in vitro
PAX9 is a key regulator during tooth development and plays an essential role in the patterning of murine and human dentition. In humans, mutations in PAX9 are associated with unique phenotypes of familial tooth agenesis that mainly involve posterior teeth. The objectives of this study were to gain new insights into the transcriptional activity and DNA methyl
Publicado em: 2009
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19. Identificação e caracterização funcional dos elementos cis-regulatorios da miostatina / Identification and functional characterization of the cis-regulatory elements of myostatin
The Myostatin protein (also known as GDF8) is a member of the transforming growth factor-β (TGF-β) superfamily and is expressed almost exclusively in skeletal muscle, both in the embryo and in the adult, where the protein circulates in the blood flow. It was initially identified in 1997 by MCPHERRON et al., and since then many studies have been dem
Publicado em: 2009
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20. A TRAJETÓRIA DO MITO E A CONDIÇÃO HUMANA NOS CONTOS DE VIA-SACRA E A CIDADE DO ÓCIO, DE JOSÉ MENDONÇA TELES
Is at work studying the trajectory of Myth and the Human Condition in tales of Via Sacra, and A Cidade do Ócio, from Jose Mendonça Teles. It is part of our proposal to give special attention to the trajectory of the anonymous man in the city that smashes through violence, the mass, the eroticism, the consumerism and many other phenomena typical of this sea
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/11/2008
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21. Cryptic mosaicism involving a second chromosome X in patients with Turner syndrome
The high abortion rate of 45,X embryos indicates that patients with Turner syndrome and 45,X karyotype could be mosaics, in at least one phase of embryo development or cellular lineage, due to the need for the other sex chromosome presence for conceptus to be compatible with life. In cases of structural chromosomal aberrations or hidden mosaicism, convention
Brazilian Journal of Medical and Biological Research. Publicado em: 2008-05
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22. Uso de matriz extracelular (Matrigel®) para estabelecimento de cultivo de células-tronco embrionárias de suínos e caracterização da expressão de moléculas associadas à pluripotência / Use of extracellular matrix (Matrigel®) for establishment of porcine embryonic stem cells and expression characterization of plurpotency related molecules
Establishment of embryonic stem cell (ESC) culture in pigs has not been achieved. Verification of pluripotency markers and differentiation in the three embryonic layers are necessary for validation of a pluripotent cell line. The objective of this study was to establish and characterize porcine ESC culture using Matrigel and compare the expression of pluripo
Publicado em: 2008
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23. As Tecnologias da reprodução: discursos sobre maternidade e paternidade no campo da reprodução assistida no Brasil
Assisted reproduction has made possible the beginning of the reproductive process outside the human body. The manipulation and circulation of embryos, eggs, sperm, and uterus displacement with the so called gestacional surrogacy have led to new social experiences. This work investigates the discourses of the main social actors involved in the issues raised b
Publicado em: 2008
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24. In vitro human beings rights / A proteção jurídica do embrião in vitro na esfera civil-constitucional
The present paper aimed at studying issues concerning the safeguard of in vitro human beings rights with regard to civil-constitutional law. At first, it was analyzed the legal condition of cryopreserved human embryos taking into account the similarities between the already born person and the unborn person. Following that, it was observed whether the consti
Publicado em: 2007