Glycemic responses in white sturgeon after oral administration of graded doses of D-glucose
Identifieur interne : 001277 ( Main/Curation ); précédent : 001276; suivant : 001278Glycemic responses in white sturgeon after oral administration of graded doses of D-glucose
Auteurs : Enric Gisbert [États-Unis, Espagne] ; Roberto D. Sainz [États-Unis] ; Silas S. O. Hung [États-Unis]Source :
- Aquaculture : (Amsterdam) [ 0044-8486 ] ; 2003.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Glucose.
English descriptors
- KwdEn :
Abstract
Oral glucose tolerance tests, using a technique that combined esophageal intubation, dorsal aorta cannulation and urinary catheterization, were performed to assess the ability of white sturgeon to utilize different doses of D-glucose (0, 250, 500, 750, 1000, 1250 and 1500 mg.kg-1 body weight (BW)). In fish intubated with 0 mg glucose.kg-1 BW, plasma glucose concentrations did not change significantly during the 24-h experimental period (4.3 ± 0.1 mmol.l-1, mean ± S.E., n=40 (5 fish and 8 time points), P>0.05). Observed maximum plasma glucose concentrations (8.4 ± 0.4 and 10.1 ± 0.8 mmol.l-1, n 5) were detected at 3-4 h post-intubation in fish given 1250 and 1500 mg glucose.kg-1 BW, respectively (P<0.05). White sturgeon dosed with 500, 750, 1000, 1250 and 1500 mg glucose.kg BW-1 showed a persistent hyperglycemia not corrected until 12-24 h post-intubation. Comparttnental modeling of plasma glucose kinetics indicated that the rate constant for glucose absorption from the digestive tract into the bloodstream was significantly reduced, indicating that glucose absorption into the circulation was non-linearly related to dose, and became saturated at higher dosages. In contrast, glucose clearance rate increased with increasing plasma glucose concentration, but the rate of gluconeogenesis appeared to decrease only slightly. The small reduction in gluconeogenesis may contribute to the prolonged hyperglycemia observed in sturgeon after a glucose load.
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Pascal:03-0383573Le document en format XML
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<term>Body weight</term>
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<term>Glucose</term>
<term>Glucose tolerance test</term>
<term>Glycemia</term>
<term>Modeling</term>
<term>Oral administration</term>
<term>Pisces</term>
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<term>Glucose</term>
<term>Hyperglycémie provoquée</term>
<term>Poids corporel</term>
<term>Modélisation</term>
<term>Absorption</term>
<term>Tube digestif</term>
<term>Glycémie</term>
<term>Pisces</term>
<term>Acipenser transmontanus</term>
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<front><div type="abstract" xml:lang="en">Oral glucose tolerance tests, using a technique that combined esophageal intubation, dorsal aorta cannulation and urinary catheterization, were performed to assess the ability of white sturgeon to utilize different doses of D-glucose (0, 250, 500, 750, 1000, 1250 and 1500 mg.kg<sup>-1</sup>
body weight (BW)). In fish intubated with 0 mg glucose.kg<sup>-1</sup>
BW, plasma glucose concentrations did not change significantly during the 24-h experimental period (4.3 ± 0.1 mmol.l<sup>-1</sup>
, mean ± S.E., n=40 (5 fish and 8 time points), P>0.05). Observed maximum plasma glucose concentrations (8.4 ± 0.4 and 10.1 ± 0.8 mmol.l<sup>-1</sup>
, n 5) were detected at 3-4 h post-intubation in fish given 1250 and 1500 mg glucose.kg<sup>-1</sup>
BW, respectively (P<0.05). White sturgeon dosed with 500, 750, 1000, 1250 and 1500 mg glucose.kg BW<sup>-1</sup>
showed a persistent hyperglycemia not corrected until 12-24 h post-intubation. Comparttnental modeling of plasma glucose kinetics indicated that the rate constant for glucose absorption from the digestive tract into the bloodstream was significantly reduced, indicating that glucose absorption into the circulation was non-linearly related to dose, and became saturated at higher dosages. In contrast, glucose clearance rate increased with increasing plasma glucose concentration, but the rate of gluconeogenesis appeared to decrease only slightly. The small reduction in gluconeogenesis may contribute to the prolonged hyperglycemia observed in sturgeon after a glucose load.</div>
</front>
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