The U.S. FDA issued a complete response letter regarding the BLA for Immunitybio Inc.’s bladder cancer treatment, N-803 (Anktiva), halting the drug’s development and slicing the stock value in half. The problems stem from the FDA’s pre-license inspection of Immunitybio’s third-party contract manufacturing organizations, the company said. It said the FDA also had recommendations for specific chemistry, manufacturing and controls issues and assays that needed to be resolved before the BLA can be approved.
With data due the first half of this year from the phase III trial testing Opdivo (nivolumab, Bristol Myers Squibb Co.) plus Nektar Therapeutics Inc.’s bempegaldesleukin (bempeg) in metastatic melanoma, the possibilities for engineered cytokines such as the latter remain alluring in many quarters.
Nantkwest Inc. and privately held Immunitybio Inc. trotted out positive early interim results from their advanced metastatic pancreatic cancer studies showing median survival rates more than double the historic rates: eight month’s survival compared to only three. “Anything beyond three months has an impact,” Patrick Soon-Shiong, Immunitybio’s CEO and Nantkwest’s executive chairman, told BioWorld, with understatement about one of the toughest to manage indications in medicine.
Physician, scientist and investor Patrick Soon-Shiong might be considered a "square peg in a round hole," he admits. But the Abraxane inventor's work to enlist natural killer, dendritic and T cells in what he calls a "triangle offense" against cancer is finally coalescing, he recently told BioWorld.