FDA Expands Approval of Sanofi’s Tzield to Younger Children

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FDA has approved an expanded indication for Sanofi’s Tzield (teplizumab), allowing its use in children as young as one year old to delay the onset of stage 3 Type 1 diabetes. The decision broadens Tzield’s previous U.S. approval, which covered patients aged eight and older with stage 2 disease. The therapy is now cleared for a significantly younger population diagnosed with stage 2 type 1 diabetes, a presymptomatic phase marked by autoimmune activity and abnormal blood glucose levels.

The approval was granted under a priority review and is supported by data from the Phase 4 PETITE-T1D study, which evaluated the drug’s safety and pharmacokinetics in children under eight, according to the company. The trial enrolled 23 participants and tested a regimen of once-daily intravenous infusions over 14 days.

Clinicians say the expanded indication addresses a critical window in disease progression. Younger children are often at higher risk of rapid onset of symptomatic diabetes, which can occur suddenly and requires lifelong insulin therapy.

Tzield is described as a CD3-directed monoclonal antibody designed to modulate the immune system’s attack on insulin-producing beta cells. Sanofi says the drug is also under FDA review for a potential additional use in patients aged eight and older who have been recently diagnosed with stage 3 disease, aiming to slow further progression.

Tzield was first approved in the U.S. in 2022 and has since gained authorizations in multiple regions, including Europe, Canada, and China, for delaying disease onset in older children and adults with stage 2 type 1 diabetes.

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