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Mereo BioPharma and Sentynl Therapeutics Announce Option and License Agreement for alvelestat in Alpha-1 Antitrypsin Deficiency-Associated Lung Disease (AATD-LD)

$MREOPress releaseAug 11, 2026, 8:00 AM ETRead the release

Mereo BioPharma entered an option and license agreement with Sentynl Therapeutics for the U.S. commercialization rights to alvelestat, a Phase 3-ready oral treatment for AATD-LD. Under the deal, Mereo receives a non-refundable option fee and, upon exercise, is eligible for $40 million in upfront and R&D payments, up to $435 million in milestones, and double-digit royalties on U.S. sales.

Key figures

Drug Name
alvelestat
Phase Of Trial
Phase 3
Potential milestones
$435 million
Patient prevalence us
50,000-80,000
Upfront and rnd payments
$40 million

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