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New drug may reduce heart attack damage
Date:7/24/2009

A novel drug that targets a master disease-causing gene can dramatically reduce heart muscle damage after a heart attack and may lead to significantly improved patient outcomes, researchers at the University of New South Wales (UNSW) have shown.

The drug, known as Dz13, specifically targets and neutralises the master regulator c-Jun gene, which is responsible for inflammation and muscle death in the aftermath of a heart attack, trials in preclinical models have found.

The drug also reduces incidental cell and tissue death resulting from life-saving interventions such as balloon angioplasty and stent placements, or from the delivery of clot-busting drugs.

Significantly, the heart's pumping action is protected by the drug, dramatically improving the patient's chances of a full recovery after a heart attack.

Safety trials of Dz13 are now underway ahead of Phase 1 human trials. A paper outlining the animal study appears this month in the high-impact cardiovascular journal Arteriosclerosis, Thrombosis and Vascular Biology.

"While this drug doesn't prevent the heart attack, it does reduce the damaging effects of the blockage on the heart once it's happened," said lead investigator Professor Levon Khachigian, from UNSW's Centre for Vascular Research.

"It's a targeted therapy that can be used to complement other procedures and improve chances of a normal recovery," he said.

The heart muscle suffers damage at two distinct times during a heart attack, Professor Khachigian said: "first when the initial blockage occurs causing the chest pain, and second, when the patient undergoes an intervention, such as angioplasty or stenting, to reopen the blocked artery".

"At both these times a range of potentially damaging coordinated molecular responses kick in," Professor Khachigian explained.

"We have been able to develop a drug to silence a disease-triggering gene. The drug improves hear
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Contact: Steve Offner
s.offner@unsw.edu.au
61-293-858-107
University of New South Wales
Source:Eurekalert

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