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Changing genetic 'red light' to green holds promise for treating disease
Date:6/15/2011

In a new study published today in the journal Nature, scientists discovered an entirely new way to change the genetic code. The findings, though early, are significant because they may ultimately help researchers alter the course of devastating genetic disorders, such as cystic fibrosis, muscular dystrophy and many forms of cancer.

The genetic code is the set of instructions in a gene that tell a cell how to make a specific protein. Central to the body's protein production process is messenger RNA, or mRNA, which takes these instructions from DNA and directs the steps necessary to build a protein. For the first time, researchers artificially modified messenger RNA, and in doing so changed the original instructions for creating the protein. The end result: A different protein than originally called for.

"The ability to manipulate the production of a protein from a particular gene is the new miracle of modern medicine," said Robert Bambara, Ph.D., chair of the Department of Biochemistry and Biophysics at the University of Rochester Medical Center. "This is a really powerful concept that can be used to try to suppress the tendency of individuals to get certain debilitating, and sometimes fatal genetic diseases that will forever change their lives."

Protein production is not a perfect process far from it. Frequent mutations or mistakes in DNA and messenger RNA can lead to flawed proteins that have the potential to cause serious harm. In the study, researchers focused on a common type of mutation that occurs when an mRNA molecule contains a pre-mature "stop" signal, known as a pre-mature stop codon. A premature stop codon orders a cell to stop reading the genetic instructions partway through the process, resulting in the creation of an incomplete, shortened protein.

Researchers were able to alter mRNA in a way that turned a stop signal into a "go" signal. As a result, the cell could read the genetic instructions all t
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Contact: Emily Boynton
emily_boynton@urmc.rochester.edu
585-273-1757
University of Rochester Medical Center
Source:Eurekalert

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