الاثنين، 5 ديسمبر 2011

ScienceDaily: Health & Medicine News

ScienceDaily: Health & Medicine News

Mechanisms cells use to remove bits of RNA from DNA strands

Posted: 04 Dec 2011 11:46 AM PST

When RNA component units called ribonucleotides become embedded in genomic DNA, they can cause problems for cells, but not much is known about the fate of these ribonucleotides. A new study identifies two mechanisms cells use to recognize and remove ribonucleotides embedded in genomic DNA, called RNases H and the mismatch repair system.

New ADHD gene study points to defects in brain signaling pathways

Posted: 04 Dec 2011 11:46 AM PST

Pediatric researchers analyzing genetic influences in attention-deficit/hyperactivity disorder have found alterations in specific genes involved in important brain signaling pathways. The study raises the possibility that drugs acting on those pathways might offer a new treatment option for patients with ADHD who have those gene variants -- potentially, half a million US children.
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