DNA methylation shown to promote development of colon tumors

Damaged or defective genes have long been known to be the cause of some cancers. Over the past decade, however, scientists have discovered that even healthy genes can be switched on or off and can cause cancer without any changes in the underlying DNA sequence—although how this happens has remained poorly understood.

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<p><a href="http://www.physorg.com/news115735786.html">DNA methylation shown to promote development of colon tumors</a></p> <p>Damaged or defective genes have long been known to be the cause of some cancers. Over the past decade, however, scientists have discovered that even healthy genes can be switched on or off and can cause cancer without any changes in the underlying DNA sequence—although how this happens has remained poorly understood.</p>