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On the track to the beta-cell.

W J Malaisse1

  • 1Laboratory of Experimental Medicine, Brussels Free University, Brussels, Belgium.

Diabetologia
|May 19, 2001
PubMed
Summary

D-mannoheptulose shows potential for non-invasively imaging the endocrine pancreas. This sugar is selectively taken up by islet cells, offering a new method for pancreatic imaging and diagnosis.

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Area of Science:

  • Biochemistry
  • Endocrinology
  • Medical Imaging

Background:

  • Non-invasive imaging of the endocrine pancreas is challenging.
  • Prior research explored succinic acid and monosaccharide esters for pancreatic labeling.

Purpose of the Study:

  • To investigate D-mannoheptulose as a potential agent for preferential labeling of the endocrine pancreas.
  • To explore D-mannoheptulose's uptake and metabolic effects in pancreatic and other cells.

Main Methods:

  • Assessing D-mannoheptulose uptake in various cell types (hepatocytes, islet cells, erythrocytes, etc.).
  • Evaluating the inhibition of D-glucose metabolism by D-mannoheptulose and its ester.
  • Comparing human and rat islet cell responses to D-mannoheptulose.

Main Results:

  • D-mannoheptulose is preferentially taken up by hepatocytes and islet cells.
  • D-mannoheptulose specifically inhibits D-glucose metabolism in hepatocytes and isolated islets.
  • Uptake of D-mannoheptulose is a carrier-mediated process.
  • Human and rat islets exhibit similar responses to D-mannoheptulose.

Conclusions:

  • D-mannoheptulose shows promise for non-invasive endocrine pancreas imaging.
  • Radiolabeled D-mannoheptulose analogs could be developed for diagnostic imaging.
  • Glycogen accumulation in insulin-producing cells under hyperglycemia offers another imaging perspective.

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