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Notre Dame research may have important implications for combating diabetes
Date:12/12/2012

Research by University of Notre Dame biochemist Anthony S. Serianni is providing new insights that could have important implications for understanding and treating diabetes.

Serianni points out that biological compounds known as dicarbonyl sugars are produced inside the human body from the natural breakdown of the simple sugar, glucose. The formation of these sugars is enhanced in diabetic patients because glucose concentrations in the blood and plasma of diabetics are significantly elevated.

"We investigated, under laboratory conditions that approximate those in the body, the degradation of a specific dicarbonyl sugar called glucosone," Serianni said. "To establish with certainty the chemical fates of the individual carbons of the glucosone molecule during degradation, we replaced some of its carbons with a rare form of carbon (denoted 13C) and applied an analytical technique known as nuclear magnetic resonance (NMR) spectroscopy to observe at the molecular level how the individual 13C carbons behave as degradation occurred."

"We learned that glucosone degrades by an unanticipated reaction pathway that involves a novel rearrangement of the carbon backbone of the molecule, a process we call C1-C2 transposition."

The discovery undermines some prevailing assumptions about how sugars generally undergo degradation.

"Since sugar degradation in the body has important physiological implications, for example by causing changes in protein structure that accompany aging and by producing highly reactive by-products that damage cellular constituents, understanding how these molecules are transformed in the body is essential to understanding spontaneous cellular processes that are not necessarily subject to typical cellular controls," Serianni said.

The research also demonstrates a new role for phosphate as a catalyst in sugar degradation, a role that may be more common in in vitro and in vivo biochemistry than currentl
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Contact: Anthony S. Serianni
aseriann@nd.edu
574-631-7807
University of Notre Dame
Source:Eurekalert

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