Influences of the adrenal cortex and the corpuscles of stannius on osmoregulation in the European eel (Anguilla anguilla L.) adapted to freshwater

Chan, D; Rankin, J. C.; Jones, I.Chester

doi:10.1016/0016-6480(69)90044-6

Cited by 74 publications

(22 citation statements)

References 23 publications

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“…But, although many hormonal factors are known to influence the G FR , a direct effect of prolactin on glomerular filtration has not been reported so far. In freshwater eels (Anguilla anguilla) G F R is stimulated by several other substances, like urophysial hormones, cortisol (Chan et al, 1969), adrenalin, angiotensin or extracts of Stannius bodies (Chester Jones et al, 1969b). The stimulating effect of prolactin on urine flow may therefore be mediated by a reduction of water uptake in the renal tubules and in the bladder.…”

Section: Renal Corpusclesmentioning

confidence: 99%

The effect of prolactin on kidney structure of the euryhaline teleost Gasterosteus aculeatus during adaptation to fresh water

Bonga

1976

Cell Tissue Res.

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Summary.The effect of injections of ovine prolactin on kidney structure was examined in the first 10 days following transfer of seawater sticklebacks to fresh water.In hormone injected animals as well as in controls the glomeruli increase slightly in size after transfer. The podocytes intensify the secretion of m ucopo lysaccharides, which is indicative of increased turnover of the components of the glomerular basal lamina. The nuclei of the podocytes become enlarged, while those of the juxtaglomerular cells decrease in size. These changes are related to the well known rise of the glomerular filtration rate following transfer to fresh water. Structural indications that prolactin is involved in the control of glomerular filtration were not found.The epithelial cells of the three nephronic segments and of the ureter become considerably better developed after transfer to fresh water. Cell height, nuclear and mitochondrial volume, and surface of the membranes of the basal labyrinth increase in all tubular epithelia, although not to the same extent. Increases are moderate in the first proximal segment, but in creasingly higher for the second proximal segment, collecting duct and the ureter. Especially the growth of membrane surface of the basal labyrinth, site of ion transport mechanisms, is impressive. In controls, values character istic for freshwater fishes are reached in 6 to 9 days for all parameters for cellular development. Prolactin injections greatly stimulate growth rates in all tubular epithelia: freshwater values are reached within 3 days. No further increase was found, however.

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Section: Renal Corpusclesmentioning

confidence: 99%

The effect of prolactin on kidney structure of the euryhaline teleost Gasterosteus aculeatus during adaptation to fresh water

Bonga

1976

Cell Tissue Res.

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“…Partial adrenalectomy of FW eels [24], done by scraping adrenal cortical cells along the cardinal veins, decreased G F R and urine How while increasing fractional Na excre tion. These changes suggest that adrenocor tical hormones may play a role in maintain ing G F R or stimulating Na reabsorption from renal tubules.…”

Section: Adrenocorticosteroidsmentioning

confidence: 99%

Endocrine Control of Renal Handling of Solutes and Water in Vertebrates

Nishimura¹

1985

Kidney Blood Press Res

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Hormones influence renal function by both extrarenal and intrarenal mechanisms. Extrarenal mechanisms include the effects through systemic hemodynamic and neural pathways, whereas intrarenal mechanisms can be largely divided into the effects on intrarenal hemodynamics and those on tubular transport epithelia. Neurohypophysial hormones and the renin-angiotensin system appear to act primarily on systemic and preglomerularvasculature in primitive vertebrates, while direct tubular action appears to have evolved at a later stage of phylogeny. Although aldosterone is an essential hormone for fluid mineral balance in mammals, the action of mineralocorticoids on tubular Na transport has not been established in nonmammalian tetrapods. In bony fishes in hyperosmotic environments, cortisol accelerates active Na extrusion from the gill. In contrast, prolactin is important for maintaining low osmotic water permeability of the transport epithelia in fishes in hypoosmotic media. Thus, both function and site of hormone action appear to have changed during the evolution of vertebrates interacting with changing environments, and in response to the demands from other bodily functions. Furthermore, evolution of interactions, at the cellular level, between systemic and locally formed hormones such as prostaglandins, kinins, and perhaps angiotensin may have developed more elaborate controlling systems of renal handling of solutes and water.

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“…The increase of the erythrocyte size should be understood as macrocytosis but no evidence was observed in blood smears, which would be apparent as the number of immature erythrocytes increases. The periodic exposure of fish to ISS should result in daily release of catecholamines and cortisol, which would lead to increase of glomerular filtration rates and urine production, as reported in European eels (Chan et al, 1969). This effect could account for a reduced blood fluid volume and a resultant, higher hematocrit (Barton et al, 1987).…”

Section: Hematologymentioning

confidence: 95%

Intermittent sustained swimming in 'matrinxã' Brycon amazonicus (Bryconidae: Bryconinae): hematological and metabolic responses

et al. 2013

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In fish, studies on a wide variety of physiological effects of exercise have been reported since a long time. It has been attributed special attention to some types of exercise, however, its application as a healthful practice in the rearing and welfare of farming fish is rising in last few years. In this particular, long-term intermittent sustained swimming (ISS) has been not yet explored. In this work, the freshwater fish Brycon amazonicus was submitted to (ISS) for 30 days at velocity of 1.0 body-length sec -1 for 12h interspaced by 12h under still water. Hematology and metabolism were evaluated. Exercised fish decreased 30% the erythrocyte number and hemoglobin was unvaried. The stores of liver glycogen and muscular triacylglycerol (TAG) were increased and the metabolic profile was typically aerobic. The slight decrease of liver (TAG) plus the full metabolic and hematic trait allow investing in this kind of exercise a beneficial practice in the rearing of fish species.Há muito tempo, tem sido relatada uma ampla variedade de efeitos fisiológicos em peixes sob exercício. Tem sido dada especial atenção a alguns tipos de exercício, mas, sua aplicação como prática salutar na criação e para o bem estar dos peixes vem crescendo nos últimos anos. Neste caso, a natação sustentada intermitente (ISS) por longos períodos ainda não foi explorada. Neste trabalho, o peixe de água doce Brycon amazonicus foi submetido a (ISS) por 30 dias à velocidade de 1,0 comprimento corporal s -1 por 12h intervalado de 12h sob regime de água sem movimento. A hematologia e o metabolismo foram avaliados. Os peixes exercitados diminuíram 30% a contagem de eritrócitos e o teor de hemoglobina permaneceu constante. Os estoques de glicogênio hepático, o teor de triacil glycerol muscular (TAG) aumentou e o perfil metabólico foi tipicamente aeróbico. O discreto aumento de TAG hepático, além das características hematológicas e do metabolismo como um todo, instiga-nos investigar este tipo de exercício como uma prática benéfica na criação de peixes.

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Influences of the adrenal cortex and the corpuscles of stannius on osmoregulation in the European eel (Anguilla anguilla L.) adapted to freshwater

Cited by 74 publications

References 23 publications

The effect of prolactin on kidney structure of the euryhaline teleost Gasterosteus aculeatus during adaptation to fresh water

The effect of prolactin on kidney structure of the euryhaline teleost Gasterosteus aculeatus during adaptation to fresh water

Endocrine Control of Renal Handling of Solutes and Water in Vertebrates

Intermittent sustained swimming in 'matrinxã' Brycon amazonicus (Bryconidae: Bryconinae): hematological and metabolic responses

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