Anselamimab Trial Misses Primary Endpoint in Amyloidosis

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A Phase 3 clinical trial evaluating Alexion’s anselamimab for light chain (AL) amyloidosis failed to meet its primary endpoint in the overall study population, but showed significant clinical benefit in a predefined subgroup of patients, according to just-released topline results.

The Cardiac Amyloid Reaching for Extended Survival (CARES) study enrolled 406 patients across 19 countries, according to a release from parent company Astrazeneca. While the treatment did not achieve statistical significance for the composite primary endpoint — a combination of time to all-cause mortality and frequency of cardiovascular hospitalizations — "results from a predefined subgroup suggest that anselamimab may address a leading cause of organ damage and functional impairment in these patients," the company says. (X

Anselamimab is designed to target and remove toxic amyloid fibrils that accumulate in organs, particularly the heart and kidneys, in patients with AL amyloidosis — a rare and progressive disorder that affects an estimated 74,000 people globally and is often diagnosed late with a poor prognosis, according to the company. The evaluation of full results is ongoing, and Alexion plans to share these data with global health authorities and present them at an upcoming medical meeting.

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