Enriching Proteolysis Targeting Chimeras with a Second Modality: When Two Are Better Than One

    Alessandra Salerno, Francesca Seghetti, Jessica Caciolla, Elisa Uliassi, Eleonora Testi, Melissa Guardigni, Marinella Roberti, Andrea Milelli, María Laura Bolognesi
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    TLDR Adding a second method to PROTACs could improve cancer treatment.
    The document discusses the use and development of Proteolysis Targeting Chimeras (PROTACs), small molecules that induce protein removal in cells, in drug discovery. PROTACs are currently under clinical trials for prostate and breast cancers, with leading candidates ARV110 and ARV471 showing good safety profiles, tolerability, and anti-tumor activity. The document explores the enhancement of PROTACs by incorporating a second modality such as polypharmacology, photopharmacology, drug conjugates, macrocycles, and oligonucleotides. It also discusses the development of light-controllable PROTACs, and the potential of combining PROTACs with antibodies or small molecules for targeted cancer treatment. Despite the potential of PROTACs, challenges such as maintaining target interaction, managing increases in molecular weight and hydrophobicity, and issues like aggregation, immunogenicity, and instability are acknowledged. The paper emphasizes the need for more research and systematic development approaches.
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