But the breakthrough is not just the enzyme. It is the delivery system. 

If you inject a foreign bacteria into the blood, the immune system destroys it immediately. So the scientists wrapped their enzyme in a microscopic lipid shell. A biological stealth bomber. It travels through the bloodstream entirely undetected. When it senses the specific inflammatory signals of a blockage, it drops the payload. 

In animal models, it dissolved 42% of existing plaque. No incisions. No stents. Just an enzyme clearing the pipes naturally. 

Human trials are still years away. 

Researchers have to guarantee the enzyme only attacks the plaque and does not destabilize healthy tissue. 

Stent procedures are not disappearing tomorrow. But for the first time, reversing established heart disease without surgery looks mechanically possible.

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What makes this study so significant is how we currently treat arterial blockages. 

Right now, if an artery is severely blocked by calcified plaque, we cannot easily remove it. We either compress the plaque against the artery wall with a metal stent to force the vessel open, or we harvest a healthy vein from your leg and surgically build a bypass detour around the blockage. 

This research represents one of the first viable chemical solutions to structurally dissolve the fibrin-lipid matrix of the plaque itself. 

The preclinical proof of concept was published in the European Heart Journal.