D-glucose and the Na+/K+ Pump in Mouse Pancreatic Islet Cells
Author Information
Author(s): ADRIAN ELMI, LARS-KE IDAHL, PER-ERIK SANDSTROM, JANOVE SEHLIN
Primary Institution: Umed University
Hypothesis
What is the effect of D-glucose on the Na+/K+ pump in pancreatic islet cells?
Conclusion
D-glucose stimulates the Na+/K+ pump in intact pancreatic islets but does not directly affect Na+/K+ ATPase activity in homogenized islets.
Supporting Evidence
- D-glucose increased the ouabain-sensitive portion of 86Rb+ influx by 65%.
- The ouabain-resistant portion of 86Rb+ influx was inhibited by 48%.
- No direct effect of D-glucose on Na+/K+ ATPase activity was observed in homogenates.
- Islets from ob/ob mice contain a high proportion of beta-cells, making them suitable for this study.
Takeaway
When you give D-glucose to mouse pancreatic cells, it helps the cells work better by making the Na+/K+ pump more active.
Methodology
The study measured 86Rb+ influx in isolated pancreatic islets and assessed Na+/K+ ATPase activity in homogenates.
Limitations
The study only used ob/ob mice and normal mice, which may limit the generalizability of the findings.
Participant Demographics
Non-inbred, 7-8 months old female ob/ob mice and 6-8 months old normal mice.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
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