Functional mapping of disease susceptibility loci using cell biology

Proceedings of the National Academy of Sciences of the United States of America
Peter A AntinozziJames E Rothman

Abstract

In most genome-wide linkage studies, implication of a causative disease gene often requires years of expanding the study to more families and finer mapping of the initially described region. Even after such efforts, unobtainable sample sizes can be required to make statistically meaningful conclusions about a single gene. Here we demonstrate that by adding a layer of functional biology to statistical genetic results, this process can be accelerated. The diabetes susceptibility locus (chromosome 18p11) was systematically dissected by using a cell-based secretion assay and RNA interference, and we identified laminin alpha1 to have a role in pancreatic beta cell secretion. The screen was extended to identify laminin receptor 1 as a functional partner in regards to beta cell function. Our approach can potentially be widely used in the setting of high-throughput cellular screening of other loci to identify candidate genes.

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Citations

Jun 28, 2011·Proceedings of the National Academy of Sciences of the United States of America·Lukas Adrian BerchtoldJoachim Størling
Dec 20, 2008·Angewandte Chemie·Chambers C HughesJames J La Clair
Oct 18, 2007·Current Opinion in Endocrinology, Diabetes, and Obesity

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