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Marvin CC, Hobson AD, McPherson M, Dunstan TA, Vargo TR, Hayes ME, Fettis MM, Bischoff A, Wang L, Wang L, Hernandez A, Jia Y, Oh JZ, Tian Y. Self-Immolative Carbamate Linkers for CD19-Budesonide Antibody-Drug Conjugates. Bioconjug Chem 2023; 34:1835-1850. [PMID: 37788373 DOI: 10.1021/acs.bioconjchem.3c00354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Antibody-drug conjugates consist of potent small-molecule payloads linked to a targeting antibody. Payloads must possess a viable functional group by which a linker for conjugation can be attached. Linker-attachment options remain limited for the connection to payloads via hydroxyl groups. A releasing group based on 2-aminopyridine was developed to enable stable attachment of para-aminobenzyl carbamate (PABC) linkers to the C21-hydroxyl group of budesonide, a glucocorticoid receptor agonist. Payload release involves a cascade of two self-immolative events that are initiated by the protease-mediated cleavage of the dipeptide-PABC bond. Budesonide release rates were determined for a series of payload-linker intermediates in buffered solution at pH 7.4 and 5.4, leading to the identification of 2-aminopyridine as the preferred releasing group. Addition of a poly(ethylene glycol) group improved linker hydrophilicity, thereby providing CD19-budesonide ADCs with suitable properties. ADC23 demonstrated targeted delivery of budesonide to CD19-expressing cells and inhibited B-cell activation in mice.
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Affiliation(s)
- Christopher C Marvin
- AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Adrian D Hobson
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Michael McPherson
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Theresa A Dunstan
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Thomas R Vargo
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Martin E Hayes
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Margaret M Fettis
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Agnieszka Bischoff
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Lu Wang
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Lu Wang
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Axel Hernandez
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Ying Jia
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Jason Z Oh
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
| | - Yu Tian
- AbbVie Bioresearch Center, 381 Plantation Street, Worcester, Massachusetts 01605, United States
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Vargo TR, Hale JS, Nelson SG. Catalytic Asymmetric Aldol Equivalents in the Enantioselective Synthesis of the Apoptolidin C Aglycone. Angew Chem Int Ed Engl 2010; 49:8678-81. [DOI: 10.1002/anie.201004925] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Germain ME, Vargo TR, McClure BA, Rack JJ, Van Patten PG, Odoi M, Knapp MJ. Quenching Mechanism of Zn(Salicylaldimine) by Nitroaromatics. Inorg Chem 2008; 47:6203-11. [DOI: 10.1021/ic702469q] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Germain ME, Vargo TR, Khalifah PG, Knapp MJ. Fluorescent Detection of Nitroaromatics and 2,3-Dimethyl- 2,3-dinitrobutane (DMNB) by a Zinc Complex: (salophen)Zn. Inorg Chem 2007; 46:4422-9. [PMID: 17472370 DOI: 10.1021/ic062012c] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fluorescent sensors for the detection of chemical explosives are in great demand. It is shown herein that the fluorescence of ZnL* (H2L=N,N'-phenylene-bis-(3,5-di-tert-butylsalicylideneimine)) is quenched in solution by nitroaromatics and 2,3-dimethyl-2,3-dinitrobutane (DMNB), chemical signatures of explosives. The relationship between the structure and fluorescence of ZnL is explored, and crystal structures of three forms of ZnL(base), (base=ethanol, tetrahydrofuran, pyridine) are reported, with the base=ethanol structure exhibiting a four-centered hydrogen bonding array. Solution structures are monitored by 1H NMR and molecular weight determination, revealing a dimeric structure in poor donor solvents which converts to a monomeric structure in the presence of good donor solvents or added Lewis bases to form five-coordinate ZnL(base). Fluorescence wavelengths and quantum yields in solution are nearly insensitive to monomer-dimer interconversion, as well as to the identity of the Lewis base; in contrast, the emission wavelength in the solid state varies for different ZnL(base) due to pi-stacking. Nitroaromatics and DMNB are moderately efficient quenchers of ZnL*, with Stern-Volmer constants KSV=2-49 M-1 in acetonitrile solution.
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Affiliation(s)
- Meaghan E Germain
- Department of Chemistry and Program in Molecular and Cellular Biology, University of Massachusetts at Amherst, Amherst, Massachusetts 01003, USA
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