Glycemic and insulin responses in white sea bream Diplodus sargus, after intraperitoneal administration of glucose

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Enes, P (Author) FCUP; Peres, H (Author) FCUP; Pousao Ferreira, P (Author) Other; Sanchez Gurmaches, J (Author) Other; Navarro, I (Author) Other; Gutierrez, J (Author) Other; Oliva Teles, A (Author) FCUP

Journal

Title: Fish Physiology and Biochemistry

Vol. 38

Pages: 645-652

ISSN: 0920-1742

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 34 Citations

Scopus - 36 Citations

Scientific classification

FOS: Agrarian Sciences > Agriculture, Forestry, and Fisheries

Other information

Authenticus ID: P-002-9Q2

DOI: 10.1007/s10695-011-9546-4

Abstract (EN): A glucose tolerance test was performed in white sea bream , juveniles to evaluate the effect of a glucose load on plasma glucose, insulin, triacylglyceride levels, and on liver glycogen storage in order to study the capability of glucose utilization by this species. After being fasted for 48 h, fish were intraperitoneally injected with either 1 g of glucose per kg body weight or a saline solution. Plasma glucose rose from a basal level of 4 to a peak of 18-19 mmol l(-1), 2-4 h after glucose injection and fish exhibited hyperglycemia for 9 h. An insulin peak (from 0.5 to 0.8 ng ml(-1)) was observed 2-6 h after glucose injection, and basal value was attained within 9 h. Liver glycogen peaked 6-12 h after the glucose load and thereafter decreased to the basal value which was attained 24 h after injection. Plasma triacylglycerides in glucose-injected fish were only significantly higher than the basal value 12 h after injection. Glucose-injected fish generally showed lower plasma triacylglyceride levels than control fish. Our results indicate that under these experimental conditions, glucose acts as an insulin secretagogue in white sea bream juveniles. Moreover, insulin may have contributed to restoring basal plasma glucose levels by enhancing glucose uptake in the liver. Further studies are needed to corroborate the lipolytic action of glucose. Clearance of glucose from the blood stream was fast, comparatively to other species, indicating that white sea bream has a good capability of glucose utilization.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8