Seasonal variation in uptake of short-chain neutral amino acid by red blood cells and hepatocytes in trout (Salmo trutta).
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چکیده
منابع مشابه
L-serine Uptake by Trout (salmo Trutta) Red Blood Cells: the Effect of Isoproterenol
We studied the uptake of L-serine by trout red blood cells and the effect of a /5-adrenergic agonist (isoproterenol) on this process. The results obtained indicate that L-serine is taken up by these cells by means of a concentrative process. The uptake seems to be mediated both by a sodium-dependent process and by a sodium-independent process. The sodium-dependent uptake is mediated by a transp...
متن کاملEffects of pH on sodium uptake in Norwegian brown trout (Salmo trutta) from an acid river.
Sodium uptake rates were measured in wild and hatchery reared Norwegian brown trout (Salmo trutta) exposed to media of a range of pH. Sodium uptake was strongly dependent on external acidity, being reduced in media of low pH. Wild fish from the naturally acid R. Tovdal (S. Norway) were more tolerant of acid media than hatchery reared fish. The effects of increasing external sodium concentration...
متن کاملUptake and Metabolism of L-alanine by Freshly Isolated Trout (salmo Trutta) Hepatocytes: the Effect of Fasting
Uptake and metabolism of L-alanine by freshly isolated trout hepatocytes has been analyzed. This amino acid is incorporated 'uphill' by different carriers, either Na-dependent or Na-independent. Na-dependent uptake shows the characteristics of an ASC system on the basis of cation dependence and substrate preferences. The Na-independent uptake is split between an L-cysteine-sensitive system and ...
متن کاملRegulation of the ASC system and Na+/K + pump activities in brown trout (Salmo trutta) hepatocytes
The present study investigates the regulation of Na+/K+ pump activity and alanine uptake in trout hepatocytes. Pump activity increased when cells were incubated in an amino-acid-free medium, while it was reduced in cells from fasted animals. Short-term exposure (3 h) to glucagon modified the activity of the pump in a complex seasonally dependent pattern: in experiments carried out in autumn and...
متن کاملMorphological differences in the skin of marble trout Salmo marmoratus and of brown trout Salmo trutta.
Despite being genetically very closely related, the marble trout Salmo marmoratus and the brown trout Salmo trutta exhibit marked phenotypic differences, particularly with regard to skin pigmentation. Histological analysis of skin from the head and gill cover of differently aged individuals of the two species was carried out in order to characterize differences in skin structure. The basic stru...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1997
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.200.21.2781