Inventors:
Patrick Daugherty - Santa Barbara CA, US
Nancy Stagliano - Santa Barbara CA, US
Jerry Thomas - Goleta CA, US
Kathryn Kamath - Santa Barbara CA, US
James W. West - Santa Barbara CA, US
Sanjay Khare - Newbury Park CA, US
International Classification:
A61K 39/395, C07K 2/00, C07K 14/00, C40B 30/04, C40B 40/10, C40B 40/02, C12N 15/11, C40B 50/06, A61K 38/16, C12P 21/06, G01N 33/53, C07K 16/00, A61K 49/00, C12N 9/68, C12N 9/50
US Classification:
4241781, 530300, 530350, 506 9, 506 18, 506 14, 536 231, 506 26, 514 12, 435 681, 435 71, 5303873, 424 91, 435217, 435219
Abstract:
The present disclosure provides activatable binding polypeptides (ABPs), which contain a target binding moiety (TBM), a masking moiety (MM), and a cleavable moiety (CM). The present disclosure provides activatable antibody compositions, which contain a TBM containing an antigen binding domain (ABD), a MM and a CM. Furthermore the present disclosure also provides ABPs which contain a first TBM, a second TBM and a CM. The ABPs exhibit an “activatable” conformation such that at least one of the TBMs is less accessible to target when uncleaved than after cleavage of the CM in the presence of a cleaving agent capable of cleaving the CM. The disclosure further provides libraries of candidate ABPs, methods of screening to identify such ABPs, and methods of use. The disclosure further provides ABPs having TBMs that bind VEGF, CTLA-4, or VCAM, ABPs having a first TBM that binds VEGF and a second TBM that binds FGF, as well as compositions and methods of use.