Mesoscopic and ultrastructural study on the atrio-auricular complex related to myoendocrine cells in guinea pig (2004)
- Authors:
- USP affiliated authors: LIBERTI, EDSON APARECIDO - ICB ; SOUZA, ROMEU RODRIGUES DE - ICB
- Unidade: ICB
- Assunto: ANATOMIA
- Language: Inglês
- Abstract: Previous studies in guinea pig hearts have shown the presence of specific atrial granules, which secrets an activator of sodium and water excretion and consenquently blood pressure reduction. This hormone, called atrial natriuretic factor (ANF), are secreted and released by the atrio-auricular complex under stimuli of hypervolemia or blood pressure increase. The endocardial surface plays a fundamental role in the transport and activation of ANF. The objective of this paper was to analyse the myoarchitecture, angioarchitecture, endocardial surface and ultrastructure of the guinea pig atrio-auricular complex, and their role in the ANF function. Hearts from 20 guinea pigs were used. The results showed that the muscle architecture in the auricles are more complex than in the atria. The arterial arrangement of the atria shows a vascular net relatively uniform and dense. In the auricle, the arterial net is denser and tortuous The scanning electron microscopy of endocardial surface has shown irregularities on the auricular surface, with the atrial surface showing a uniform arrangement. The findings related to the atrial-auricular complex are very useful, since it has been observed in studies related to cardiac surgeries that removal of the auricles, and consequently reduction of circulating ANF, causes acute and chronic abnormalities in the body fluid control
- Imprenta:
- Source:
- Título do periódico: Abstracts
- Conference titles: Congress of the Brazilian Society for Cell Biology
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ABNT
GAMA, Eliane Florencio et al. Mesoscopic and ultrastructural study on the atrio-auricular complex related to myoendocrine cells in guinea pig. 2004, Anais.. Campinas: Instituto de Ciências Biomédicas, Universidade de São Paulo, 2004. . Acesso em: 19 abr. 2024. -
APA
Gama, E. F., Ferraz de Carvalho, C. A., Liberti, E. A., & Souza, R. R. de. (2004). Mesoscopic and ultrastructural study on the atrio-auricular complex related to myoendocrine cells in guinea pig. In Abstracts. Campinas: Instituto de Ciências Biomédicas, Universidade de São Paulo. -
NLM
Gama EF, Ferraz de Carvalho CA, Liberti EA, Souza RR de. Mesoscopic and ultrastructural study on the atrio-auricular complex related to myoendocrine cells in guinea pig. Abstracts. 2004 ;[citado 2024 abr. 19 ] -
Vancouver
Gama EF, Ferraz de Carvalho CA, Liberti EA, Souza RR de. Mesoscopic and ultrastructural study on the atrio-auricular complex related to myoendocrine cells in guinea pig. Abstracts. 2004 ;[citado 2024 abr. 19 ] - Effects of differents forms of the CL strain of Trypanosoma cruzi in the myenteric plexus of the esophagus in chronic chagasic CH3 mice
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