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Improved Physical Stability of an Antibody–Drug Conjugate Using Host–Guest Chemistry
Bioconjugate Chemistry ( IF 4.349 ) Pub Date : 2019-12-16 , DOI: 10.1021/acs.bioconjchem.9b00809
Silvia Sonzini; Maria Laura Greco; Thais Cailleau; Lauren Adams; Luke Masterson; Balakumar Vijayakrishnan; Conor Barry; Phillip Howard; Peter Ravn; Christopher F. van der Walle

Antibody–drug conjugates (ADCs) are an emerging class of biopharmaceutical products for oncology, with the cytotoxic pyrrolobenzodiazepine (PBD) family of “warheads” well-established in the clinic. While PBDs offer high potency, they are also characterized by their hydrophobicity, which can make formulation of the ADC challenging. Several approaches have been investigated to improve the physicochemical properties of PBD-containing ADCs, and herein a supramolecular approach was explored using cucurbit[8]uril (CB[8]). The ability of CB[8] to simultaneously encapsulate two guests was exploited to incorporate a 12-mer polyethylene glycol harboring a methyl viologen moiety at one terminus (MV-PEG12), together with a PBD harboring an indole moiety at the C2′ position (SG3811). This formulation approach successfully introduced a hydrophilic PEG to mask the hydrophobicity of SG3811, improving the physical stability of the ADC while avoiding any loss of potency related to chemical modification.
更新日期:2019-12-17

 

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