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Novartis pauses autoimmune cell therapy studies after deaths, WSJ reports

By Thomson Reuters Aug 31, 2026 | 11:38 PM

Sept 1 (Reuters) – Novartis paused eight clinical trials of an experimental therapy targeting autoimmune and neurological disorders ​in late August, after three ‌patients died, the Wall Street Journal reported on Tuesday.

The Swiss pharmaceutical company temporarily halted the studies after learning of three fatal ‌cases ​of a severe immune ⁠response, the report ⁠said, citing a spokesman. It wasn’t immediately clear when the deaths occurred.

The experimental treatment is called chimeric antigen receptor ​T-cell, or CAR-T.

CAR-T therapies modify a patient’s immune cells to recognize ⁠a specific target ⁠and destroy cancer cells.

Novartis is ​conducting “a comprehensive review of the observed safety ​events,” the spokesman told WSJ, describing ‌the fatal immune response as a known safety risk in CAR-T therapies.

According to the report, the company said ⁠it is working with independent safety boards overseeing each paused study and sharing what it ⁠knows with ‌regulators.

Bristol-Myers Squibb had also ⁠paused similar trials of its ​CAR-T ‌treatment in autoimmune disorders as ​a precautionary ⁠measure, the newspaper said.

Novartis and BMY did not immediately respond to Reuters requests for comment.

(Reporting by Shivani Tanna in Bengaluru; Editing by Janane Venkatraman and ​Mrigank Dhaniwala)