Tuesday, March 13, 2018 11:17:44 AM
Medical problems began following the first dose of Imfinzi but were managed, Advaxis CSO Robert Petit said on a call with investors. The patient then received a second dose of Imfinzi followed by an administration of axalimogene filolisbac. The situation escalated from there.
After receiving treatment for hypotension, the patient was hospitalized and thereafter developed respiratory failure. Efforts to stop the worsening of the patient’s condition fell short and she died.
The events leave Advaxis facing the conundrum of why a patient who had previously tolerated both drugs died of respiratory failure. Prior studies suggest Imfinzi may be the culprit. One patient had died of respiratory failure in AstraZeneca’s phase 3 trial of Imfinzi in lung cancer at the time it reported data in September, and analysts at Jefferies uncovered other incidents linked to the drug and checkpoint inhibitors in general.
"We reviewed the BLA for [Imfinzi] and noted 0.8% death rate within 30 days due to respiratory failure in the safety database. This also corresponds with SAE reports of 1% respiratory failure in trials for [Imfinzi], [Keytruda] and [Bavencio] that we reviewed, suggesting 1% incidence across most PD-1/L1s. In some cases, the SAEs were reported as [cardiorespiratory] arrest, which suggests cardiac etiology and would also align with hypotension as reported for the deceased patient [in Advaxis' trial]," the analysts wrote."
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