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1.
Anim. Reprod. (Online) ; 16(1): 31-38, jan.-mar. 2019. ilus
Artigo em Inglês | VETINDEX | ID: biblio-1461422

Resumo

Intercellular communication is an essential mechanism for development and maintenance of multicellular organisms. Extracellular vesicles (EVs) were recently described as new players in the intercellular communication. EVs are double-membrane vesicles secreted by cells and are classified according to their biosynthesis, protein markers and morphology. These extracellular vesicles contain bioactive materials such as miRNA, mRNA, protein and lipids. These characteristics permit their involvement in different biological processes. Reproductive physiology is complex and involves constant communication between cells. Different laboratories have described the presence of EVs secreted by ovarian follicular cells, oviductal cells, in vitro produced embryos and by the endometrium, suggesting that EVs are involved in the development of gametes and embryos, in animals and humans. Therefore, is important to understand physiological mechanisms and contributions of EVs in female reproduction in order to develop new tools to improve in vivo reproductive events and assisted reproductive techniques (ARTs). This review will provide the current knowledge related to EVs in female reproductive tissues and their role in ARTs.


Assuntos
Feminino , Animais , Técnicas Reprodutivas/tendências , Técnicas Reprodutivas/veterinária , Vesículas Extracelulares/enzimologia
2.
Anim. Reprod. ; 16(1): 31-38, jan.-mar. 2019. ilus
Artigo em Inglês | VETINDEX | ID: vti-20907

Resumo

Intercellular communication is an essential mechanism for development and maintenance of multicellular organisms. Extracellular vesicles (EVs) were recently described as new players in the intercellular communication. EVs are double-membrane vesicles secreted by cells and are classified according to their biosynthesis, protein markers and morphology. These extracellular vesicles contain bioactive materials such as miRNA, mRNA, protein and lipids. These characteristics permit their involvement in different biological processes. Reproductive physiology is complex and involves constant communication between cells. Different laboratories have described the presence of EVs secreted by ovarian follicular cells, oviductal cells, in vitro produced embryos and by the endometrium, suggesting that EVs are involved in the development of gametes and embryos, in animals and humans. Therefore, is important to understand physiological mechanisms and contributions of EVs in female reproduction in order to develop new tools to improve in vivo reproductive events and assisted reproductive techniques (ARTs). This review will provide the current knowledge related to EVs in female reproductive tissues and their role in ARTs.(AU)


Assuntos
Animais , Feminino , Técnicas Reprodutivas/tendências , Técnicas Reprodutivas/veterinária , Vesículas Extracelulares/enzimologia
3.
Braz. j. vet. pathol ; 9(1): 31-33, mar. 2016. ilus
Artigo em Inglês | VETINDEX | ID: biblio-1469942

Resumo

Dysgerminoma and granulosa cell tumor are neoplasms of the ovary of domestic animals, originating from germ cells and sex-cords cells, respectively. These neoplasms generally occur unilaterally, and usually as a single neoplasm. This report describes a case of a dysgerminoma in the right ovary and a granulosa cell tumor in the left ovary in a six years old bitch. An Akita and Siberian Husky crossbred bitch was admitted at the Veterinary Hospital (Universidade Vila Velha), with a history of purulent vaginal discharge, irregular estrous cycle, fatigue, polydipsia and polyuria. Ultrasound exam demonstrated bilateral ovarian neoplasms, and the animal was subjected to ovariohysterectomy. Macroscopic and microscopic features found in right and left ovaries were typical of dysgerminoma and granulosa cells tumor Sertoli-like, respectively. The uterus had cystic endometrial hyperplasia associated with mild metritis. Ovarian neoplasms occurring bilaterally are uncommon especially with different cell origins and distinct histopathological patterns in each ovary as described in this report.


Assuntos
Feminino , Animais , Cães , Disgerminoma/patologia , Disgerminoma/veterinária , Tumor de Células da Granulosa/veterinária , Doenças do Sistema Endócrino/veterinária , Endometrite/veterinária , Neoplasias Ovarianas/veterinária
4.
Rev. bras. ciênc. avic ; 18(3): 505-509, Jul-Set. 2016. tab, ilus
Artigo em Inglês | VETINDEX | ID: biblio-1490278

Resumo

Gossypol, a phenolic compound produced by the pigment glands of cotton, is known to affect male reproduction. In females, exposure to gossypol has been associated with interference with the estrous cycle and embryo development. In laying hens fed cottonseed, gossypol was found to reduce egg production and weight and to cause discoloration of the egg yolk and/or albumen. It is probable that gossypol directly affects ovarian follicles, but this has not been confirmed experimentally yet. Thus, the aim of the present study was to determine if gossypol affected cultivated ovarian follicles of the chicken. Ovarian follicles of adult female chickens were cultivated with different concentrations of gossypol (0, 5, 10 and 20 g/mL) and classified according to the stage of development as primordial, transitional, primary, secondary or antral, and as viable or atretic. The percentages of viable and atretic follicles in the ovaries cultivated for 24 hours in the presence of gossypol were significantly different from those of the controls for all types of follicles except for secondary follicles, but in all types after cultivation for 7 days. The percentage of viable follicles was higher than that of atretic follicles in ovaries cultivated without gossypol. In contrast, ovaries cultivated with gossypol showed a predominance of atretic follicles. Gossypol increased the proportion of atretic follicles at all stages of development in cultivated chicken ovaries. Thus, gossypol may affect ovarian follicular viability and maturation, which might interfere with female fertility.


Assuntos
Feminino , Animais , Desenvolvimento Embrionário/fisiologia , Folículo Ovariano , Galinhas/fisiologia , Gossipol/análise , Ciclo Estral , Fertilidade , Reprodução/fisiologia , Técnicas In Vitro/veterinária
5.
R. bras. Ci. avíc. ; 18(3): 505-509, Jul-Set. 2016. tab, ilus
Artigo em Inglês | VETINDEX | ID: vti-15512

Resumo

Gossypol, a phenolic compound produced by the pigment glands of cotton, is known to affect male reproduction. In females, exposure to gossypol has been associated with interference with the estrous cycle and embryo development. In laying hens fed cottonseed, gossypol was found to reduce egg production and weight and to cause discoloration of the egg yolk and/or albumen. It is probable that gossypol directly affects ovarian follicles, but this has not been confirmed experimentally yet. Thus, the aim of the present study was to determine if gossypol affected cultivated ovarian follicles of the chicken. Ovarian follicles of adult female chickens were cultivated with different concentrations of gossypol (0, 5, 10 and 20 g/mL) and classified according to the stage of development as primordial, transitional, primary, secondary or antral, and as viable or atretic. The percentages of viable and atretic follicles in the ovaries cultivated for 24 hours in the presence of gossypol were significantly different from those of the controls for all types of follicles except for secondary follicles, but in all types after cultivation for 7 days. The percentage of viable follicles was higher than that of atretic follicles in ovaries cultivated without gossypol. In contrast, ovaries cultivated with gossypol showed a predominance of atretic follicles. Gossypol increased the proportion of atretic follicles at all stages of development in cultivated chicken ovaries. Thus, gossypol may affect ovarian follicular viability and maturation, which might interfere with female fertility.(AU)


Assuntos
Animais , Feminino , Gossipol/análise , Galinhas/fisiologia , Desenvolvimento Embrionário/fisiologia , Folículo Ovariano , Técnicas In Vitro/veterinária , Reprodução/fisiologia , Ciclo Estral , Fertilidade
6.
Braz. J. Vet. Pathol. ; 9(1): 31-33, mar. 2016. ilus
Artigo em Inglês | VETINDEX | ID: vti-684115

Resumo

Dysgerminoma and granulosa cell tumor are neoplasms of the ovary of domestic animals, originating from germ cells and sex-cords cells, respectively. These neoplasms generally occur unilaterally, and usually as a single neoplasm. This report describes a case of a dysgerminoma in the right ovary and a granulosa cell tumor in the left ovary in a six years old bitch. An Akita and Siberian Husky crossbred bitch was admitted at the Veterinary Hospital (Universidade Vila Velha), with a history of purulent vaginal discharge, irregular estrous cycle, fatigue, polydipsia and polyuria. Ultrasound exam demonstrated bilateral ovarian neoplasms, and the animal was subjected to ovariohysterectomy. Macroscopic and microscopic features found in right and left ovaries were typical of dysgerminoma and granulosa cells tumor Sertoli-like, respectively. The uterus had cystic endometrial hyperplasia associated with mild metritis. Ovarian neoplasms occurring bilaterally are uncommon especially with different cell origins and distinct histopathological patterns in each ovary as described in this report.(AU)


Assuntos
Animais , Feminino , Cães , Disgerminoma/patologia , Disgerminoma/veterinária , Tumor de Células da Granulosa/veterinária , Neoplasias Ovarianas/veterinária , Endometrite/veterinária , Doenças do Sistema Endócrino/veterinária
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