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Longeveron explores strategic options after therapy fails mid-stage trial for infant heart condition

By Thomson Reuters Sep 16, 2026 | 5:18 PM

Sept 17 (Reuters) – Longeveron on Wednesday said it would explore strategic options after its experimental stem cell therapy failed to meet the main goal ​of a mid-stage trial for a rare ‌infant heart condition.

Shares of the company, which have gained 32% so far this year, plunged nearly 60% in after-hours trading.

• The study tested the drug, laromestrocel, alongside standard surgery in 40 ‌infants ​born with hypoplastic left heart ⁠syndrome, a severe birth ⁠defect where the left side of the heart is underdeveloped.

• The company said the study did not show the drug improving how well the right ​side of the heart pumped blood after 12 months compared to standard care alone.

• Over a 12-month ⁠period, there were no deaths ⁠among infants treated with laromestrocel compared with ​one death in the standard-care group, Longeveron said.

• In ​a subset of patients followed for up to ‌five years, one death or heart-transplant event occurred among 17 patients in the treatment group, compared with two events among 21 patients in the standard-care group.

• Longeveron ⁠plans to review the data and meet with the U.S. Food and Drug Administration to discuss potential next steps for the ⁠program.

• The ‌therapy was safe and well tolerated, ⁠with no new safety concerns identified, the ​company ‌added.

• Longeveron said it has “initiated a process ​to review ⁠all options with the goal of maximizing shareholder value” while taking steps to cut costs.

• The company plans to shift resources toward developing the therapy for longevity and aging-related frailty.

(Reporting by Kamal Choudhury in Bengaluru; Editing ​by Jonathan Ananda)