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Michigan Tech researchers link 11 genetic variations to type 2 diabetes
Date:4/1/2008

HOUGHTON, Mich.--Mathematicians at Michigan Technological University have developed powerful new tools for winnowing out the genes behind some of humanitys most intractable diseases.

With one, they can cast back through generations to pinpoint the genes behind inherited illness. With another, they have isolated 11 variations within genescalled single nucleotide polymorphisms, SNPs or snipsassociated with type 2 diabetes.

With chronic, complex diseases like Parkinsons, diabetes and ALS [Lou Gehrigs disease], multiple genes are involved, said Qiuying Sha, an assistant professor of mathematical sciences. You need a powerful test.

That test is the Ensemble Learning Approach (ELA), software that can detect a set of SNPs that jointly have a significant effect on a disease.

With complex inherited conditions, including type 2 diabetes, single genes may precipitate the disease on their own, while other genes cause disease when they act together. In the past, finding these gene-gene combinations has been especially unwieldy, because the calculations needed to match up suspect genes among the 500,000 or so in the human genome have been virtually impossible.

ELA sidesteps this problem, first by drastically narrowing the field of potentially dangerous genes, and second, by applying statistical methods to determine which SNPs act on their own and which act in combination. We thought it was pretty cool, Sha said.

To test their model on real data, Shas team analyzed genes from over 1,000 people in the United Kingdom, half with type 2 diabetes and half without. They identified 11 SNPs that, singly or in pairs, are linked to the disease with a high degree of probability. Their work has been accepted by the journal Genetic Epidemiology and is available online at http://www3.interscience.wiley.com/cgi-bin/abstract/117890704/ABSTRACT .


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Contact: Marcia Goodrich
mtunews@mtu.edu
906-487-2343
Michigan Technological University
Source:Eurekalert

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