Cited by 140Pancreatic function and diabetesDiabetes Management and ResearchMetabolism, Diabetes, and Cancer

Portal glucose infusion in the mouse induces hypoglycemia: evidence that the hepatoportal glucose sensor stimulates glucose utilization.

Burcelin, R, Dolci, W, Thorens, B·2000·Diabetes

Abstract

To analyze the role of the murine hepatoportal glucose sensor in the control of whole-body glucose metabolism, we infused glucose at a rate corresponding to the endogenous glucose production rate through the portal vein of conscious mice (Po-mice) that were fasted for 6 h. Mice infused with glucose at the same rate through the femoral vein (Fe-mice) and mice infused with a saline solution (Sal-mice) were used as controls. In Po-mice, hypoglycemia progressively developed until glucose levels dropped to a nadir of 2.3 +/- 0.1 mmol/l, whereas in Fe-mice, glycemia rapidly and transiently developed, and glucose levels increased to 7.7 +/- 0.6 mmol/l before progressively returning to fasting glycemic levels. Plasma insulin levels were similar in both Po- and Fe-mice during and at the end of the infusion periods (21.2 +/- 2.2 vs. 25.7 +/- 0.9 microU/ml, respectively, at 180 min of infusion). The whole-body glucose turnover rate was significantly higher in Po-mice than in Fe-mice (45.9 +/- 3.8 vs. 37.7 +/- 2.0 mg x kg(-1) x min)-1), respectively) and in Sal-mice (24.4 +/- 1.8 mg x kg(-1) x min(-1)). Somatostatin co-infusion with glucose in Po-mice prevented hypoglycemia without modifying the plasma insulin profile. Finally, tissue glucose clearance, which was determined after injecting 14C-2-deoxyglucose, increased to a higher level in Po-mice versus Fe-mice in the heart, brown adipose tissue, and the soleus muscle. Our data show that stimulation of the hepatoportal glucose sensor induced hypoglycemia and increased glucose utilization by a combination of insulin-dependent and insulin-independent or -sensitizing mechanisms. Furthermore, activation of the glucose sensor and/or transmission of its signal to target tissues can be blocked by somatostatin.

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Crossref · 10.2337/diabetes.49.10.1635

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Authors
Burcelin, R., Dolci, W., & Thorens, B.
Affiliations
University of Lausanne (CH)
Venue
Diabetes
Published
2000-10-01
Volume
49
Issue
10
Pages
1635-1642
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2137028096
Cited by
137
References
0
Citations by year
2026: 1 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 6 · 2020: 3 · 2019: 2 · 2018: 2 · 2017: 2 · 2016: 5 · 2015: 6 · 2014: 6 · 2013: 11 · 2012: 6
FWCI
7.02
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • IRIS (submittedVersion)
  • SERVAL (Université de Lausanne) (submittedVersion)
Funders
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
hypoglycemia, glucose infusion, portal vein, somatostatin, insulin, insulin-independent glucose uptake, heart, brown adipose tissue, soleus muscle, glucose clearance, 2-deoxyglucose, glucose metabolism
MeSH terms
Animals, Blood Glucose, Glucose, Homeostasis, Hypoglycemia, Hypothalamus, Infusions, Intravenous, Insulin, Liver, Metabolic Clearance Rate, Mice, Inbred C57BL, Muscle Denervation, Portal Vein, Somatostatin, Vagus Nerve, Muscle, Skeletal, Mice

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