Marengo Therapeutics Inc. is opening up a new front in the war on cancer by selectively deploying a tumor-infiltrating subpopulation of T cells, which can be activated by a newly identified, antibody-based mechanism. The Cambridge, Mass.-based company is taking forward a scientific concept that has been germinating for several years at founding investor and company creator ATP, which has now launched the firm with an $80 million series A round. Marengo is gearing up for a first clinical trial in 2022. “It’s a new chapter in T-cell biology,” CEO Zhen Su told BioWorld.