Abstract: The invention features isolated mRNAs encoding fusion polypeptides comprising a Stefm A (SteA) scaffold polypeptide and one or more binding polypeptides, such as one or more Bc1-2 homology 3 (BH3) domains, including mRNAs comprising one or more modified nucleobase, and methods of using the same, for example, for inducing apoptosis and/or treating cancer (e.g., liver cancer or colorectal cancer).

Abstract: The present invention provides exosomes as drug delivery vehicles, compositions comprising a therapeutic agent encapsulated within such exosomes, methods of producing such exosomes and compositions thereof, as well as methods of delivering such exosomes and compositions to a specific patient tissue or organ. The present invention also provides methods of treating a disease, disorder, or condition such as cancer, an inflammatory disease, an infectious disease, an allergic disease, or an autoimmune disease, comprising administering to a patient in need thereof a provided therapeutic-loaded exosome or a pharmaceutical composition thereof.