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Mutations common to cancer and developmental disorder examined in a novel disease model
Date:12/21/2008

December 22, 2008, Cambridge, UK New research sheds light on a common link between tumor formation and Costello Syndrome, an inherited developmental disorder in which patients have cardiac defects, mild mental retardation, and face-shape abnormalities. The study published in the journal Disease Models & Mechanisms (DMM), dmm.biologists.org uses a zebrafish model to help explain a puzzling connection between Costello syndrome and cancer.

Costello Syndrome is one of several developmental disorders caused by mutations in a gene known as H-RAS. Additionally, mutations in H-RAS and the Ras family of genes are common in most human cancers. Thus, scientists are trying to determine how genetic mutations that activate H-RAS can cause a congenital illness as well as cancer . In this new study, Cristina Santoriello and colleagues investigate this mystery by expressing activated H-RAS in zebrafish, which are often used to study the developmental process. They found that the effect of mutant H-RAS in part depends on the timing and level of gene expression. Higher levels of H-RAS caused overabundant cell-growth, reminiscent of tumors. Furthermore, zebrafish expressing mutant H-RAS through development displayed hallmarks of the human Costello Syndrome, such as reduced body size, heart defects, and physical deformities.

This new model of Costello Syndrome can be used to learn more about this disease, particularly in regard to symptoms that worsen with age. Additionally, using this model to examine the developmental processes that control cancerous mutant H-RAS effects can potentially lead to novel cancer therapies.


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Contact: Donna Perry
donna@biologists.com
44-012-234-33319
The Company of Biologists
Source:Eurekalert

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