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	Provedor de dados Anais da ABC (AABC) (2) Autor CARUSO-NEVES,CELSO (1) LOPES,ANÍBAL GIL (1) Martini,Sabrina V. (1) Morales,Marcelo M. (1) Nascimento,Suzete B. (1) Palavra-chave Fluid secretion (2) (Na+ + K+)ATPase (1) 5-hydroxitryptamine (1) Adenosine (1) Hormones (1) Malpighian tubule (1) Malpighian tubules (1) Na+ -ATPase (1) Rhodnius prolixus (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2007 (1) 2000 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Sodium pumps in the Malpighian tubule of Rhodnius sp. Anais da ABC (AABC) CARUSO-NEVES,CELSO; LOPES,ANÍBAL GIL. Malpighian tubule of Rhodnius sp. express two sodium pumps: the classical ouabain-sensitive (Na+ + K+)ATPase and an ouabain-insensitive, furosemide-sensitive Na+-ATPase. In insects, 5-hydroxitryptamine is a diuretic hormone released during meals. It inhibits the (Na+ + K+)ATPase and Na+ -ATPase activities indicating that these enzymes are involved in fluid secretion. Furthermore, in Rhodnius neglectus, proximal cells of Malpighian tubule exposed to hyperosmotic medium, regulate their volume through a mechanism called regulatory volume increase. This regulatory response involves inhibition of the (Na+ + K+)ATPase activity that could lead to accumulation of active osmotic solute inside the cell, influx of water and return to the normal cell volume.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Malpighian tubule; (Na+ + K+)ATPase; Na+ -ATPase; Fluid secretion; Adenosine; 5-hydroxitryptamine. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652000000300014 Rhodnius prolixus Malpighian tubules and control of diuresis by neurohormones Anais da ABC (AABC) Martini,Sabrina V.; Nascimento,Suzete B.; Morales,Marcelo M.. Rhodnius prolixus Malpighian tubules (MTs) are a good model for fluid and ion secretion studies in view of the dramatic postprandial diuresis, which follows its massive blood meals. Ingestion of a blood meal equals to 10-12 times their initial body mass, leads to rapid activation of high output by excretory system, which eliminates 40-50% of the fluid mass. Secretion of ions and water is stimulated 1000-fold by serotonin and diuretic hormone. These hormones cooperate synergistically to activate adenylate cyclase activity from MTs cells, which increase the level of intracellular cAMP. The anti-diuretic hormones have also an important role in the fluid maintenance of Rhodnius prolixus. Several hours after insect feeding occurs a reduction in urine flow, that... Tipo: Info:eu-repo/semantics/article Palavras-chave: Malpighian tubules; Rhodnius prolixus; Hormones; Fluid secretion. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000100011 Registros recuperados: 2 Primeira ... 1 ... Última

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