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Esperion Jumps on Artery Drug Trial

An experimental treatment helps lower plaque in coronary patients.

A drug designed by

Esperion Therapeutics

(ESPR) - Get Esperion Therapeutics, Inc. Report

to cleanse coronary arteries met its primary objective in a 47-person phase II trial.

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The company's shares were recently up $2.35, or 16%, to $17.20 on Instinet.The stock was also upgraded Thursday by Piper Jaffray, which raised its price target to $23.

In the trial, Esperion's ETC-216 resulted in a statistically significant reduction in artery hardening in a pool of 47 patients who were scheduled to undergo coronary angiography.

The drug is derived from a protein called ApoA-I Milano, the major component of HDL, which is believed to protect against cardiovascular disease by removing cholesterol and other lipids from artery walls and other tissues. It's naturally present in a small population of northern Italians.

Esperion said it will release further trial results when it makes a complete presentation on the study, pending additional efficacy parameters as well as safety and tolerability analyses.