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Santa Barbara, CA, United States

Patent
CytomX Therapeutics | Date: 2015-03-30

The present disclosure provides for proprotein and activatable proprotein compositions. A proprotein contains a functional protein (i.e. a full length protein or functional fragment thereof) which is coupled to a peptide mask that inhibits the binding of the functional protein to its target or binding partner. An activatable proprotein contains a functional protein coupled to a peptide mask, and further coupled to an activatable linker, wherein in an non-activated state, the peptide mask inhibits binding of the functional protein to its target or binding partner and in an activated state the peptide mask does not inhibit binding of the functional protein to its target or binding partner. Proproteins can provide for reduced toxicity and adverse side effects that could otherwise result from binding of a functional protein at non-treatment sites if it were not inhibited from binding its binding partner. Proproteins can further provide improved biodistribution characteristics. Proproteins containing a peptide mask can display a longer in vivo or serum half-life than the corresponding functional protein not containing a peptide mask. The disclosure further provides methods of screening for, making, and using these proproteins.


The invention relates generally to multispecific antibodies and to multispecific activatable antibodies that specifically bind to two or more different antigens or epitopes, as well as to methods of making and using these multispecific antibodies and/or multispecific activatable antibodies in a variety of therapeutic, diagnostic and prophylactic indications.


The invention relates generally to polypeptides that include a cleavable moiety that is a substrate for at least one protease selected from matriptase and u-plasminogen activator (uPA), to activatable antibodies and other larger molecules that include the cleavable moiety that is a substrate for at least one protease selected from matriptase and u-plasminogen activator, and to methods of making and using these polypeptides that include a cleavable moiety that is a substrate for at least one protease selected from matriptase and u-plasminogen activator in a variety of therapeutic, diagnostic and prophylactic indications.


Patent
CytomX Therapeutics | Date: 2014-06-04

The invention relates generally to compositions and methods for conjugating antibodies and activatable antibodies, and methods of partially reducing antibodies and/or activatable antibodies prior to conjugation, e.g., thiol-based conjugation, with an agent, e.g., a therapeutic and/or diagnostic agent.


The invention relates generally to polypeptides that include a cleavable moiety that is a substrate for at least one matrix metalloprotease (MMP), to activatable antibodies and other larger molecules that include the cleavable moiety that is a substrate for at least one MMP protease, and to methods of making and using these polypeptides that include a cleavable moiety that is a substrate for at least one MMP protease in a variety of therapeutic, diagnostic and prophylactic indications.

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