PRBB-CRG Sessions Andrea Califano

10/03/202312:00MARIE CURIEPRBB-CRG SessionsAndrea CalifanoColumbia University Medical Center, Herbert Irving Cancer Research Center, New York, USA"Bringing single cell analyses to the clinics"Host: Pia CosmaAbstract:We have developed network-based methodologies for the systematic identification, validation, and pharmacological targeting of a new class of therapeutic targets. These targets comprise Master Regulator proteins, whose concerted activity within a Regulatory Checkpoint module is responsible for the mechanistic implementation and maintenance of cell transcriptional state, in both transformed and non-transformed cells. By leveraging these methodologies, we have developed NY CLIA certified tests (OncoTreat and OncoTarget) that leverage large-scale drug-perturbation assays to systematically identify drugs and drug combinations whose mechanism of action is specifically effective in abrogating tumour checkpoint activity, on an individual patient basis. These tests have shown >80% success rate in 35 drug arms in PDX models established from patients who had failed multiple lines of therapy. We will first introduce the methodological advances supporting the development of these methodologies and then demonstrate their extension to elucidating drugs capable of targeting the master regulator dependencies of transcriptionally distinct tumour subpopulations, at the single cell level. Specifically, we will discuss identification and pre-clinical validation of drugs combinations targeting stem-like progenitor and differentiated cells in breast adenocarcinoma as well as Master Regulators of tumour-infiltrating T regulatory cells, thus potentiating the effect of immune checkpoint therapy.