A Potent Anti-CD70 Antibody–Drug Conjugate Combining a Dimeric Pyrrolobenzodiazepine Drug with Site-Specific Conjugation Technology
摘要:
A highly cytotoxic DNA cross-linking pyrrolobenzodiazepine (PBD) dimer with a valine-alanine dipeptide linker was conjugated to the anti-CD70 h1F6 mAb either through endogenous interchain cysteines or, site-specifically, through engineered cysteines at position 239 of the heavy chains. The h1F6(239C)-PBD conjugation strategy proved to be superior to interchain cysteine conjugation, affording an antibody-drug conjugate (ADC) with high uniformity in drug-loading and low levels of aggregation. In vitro cytotoxicity experiments demonstrated that the h1F6(239C)-PBD was potent and immunologically specific on CD70-positive renal cell carcinoma (RCC) and non-Hodgkin lymphoma (NHL) cell lines. The conjugate was resistant to drug loss in plasma and in circulation, and had a pharmacokinetic profile closely matching that of the parental h1F6(239C) antibody capped with N-ethylmaleimide (NEM). Evaluation in CD70-positive RCC and NHL mouse xenograft models showed pronounced antitumor activities at single or weekly doses as low as 0.1 mg/kg of ADC. The ADC was tolerated at 2.5 mg/kg. These results demonstrate that PBDs can be effectively used for antibody-targeted therapy.
[EN] BIOLOGICAL MATERIALS AND USES THEREOF<br/>[FR] MATÉRIELS BIOLOGIQUES ET LEURS UTILISATIONS
申请人:ANTIKOR BIOPHARMA LTD
公开号:WO2016046574A1
公开(公告)日:2016-03-31
The invention provides compounds comprising a therapeutic agent coupled to a carrier molecule, with a minimum coupling ratio of 5: 1; wherein the carrier molecule is (i) an antibody fragment or derivative thereof or (ii) an antibody mimetic or derivative thereof; and wherein the therapeutic agents are coupled onto a lysine amino acid residue; and further wherein the therapeutic agent is not a photosensitising agent. There is also provided uses, methods relating to such compounds, as well as processes for their manufacture.
[EN] DIELS-ALDER CONJUGATION METHODS<br/>[FR] PROCÉDÉS DE CONJUGAISON DE DIELS-ALDER
申请人:REGENERON PHARMA
公开号:WO2021211984A1
公开(公告)日:2021-10-21
Described herein are protein-payload conjugates and compositions thereof that are useful, for example, for target-specific delivery of therapeutic and/or imaging agent moieties. In certain embodiments, provided are specific and efficient methods for producing protein-payload constructs (e.g., antibody-drug conjugates) utilizing a combination of transglutaminase and Diels-Alder techniques. Antibody-drug conjugates and compositions which comprise glutaminyl-modified antibodies, Diels-Alder adducts, and reactive payloads and are provided.
Provided are Conjugate comprising PBDs conjugated to a targeting agent and methods of using such PBDs.
提供了一种包含PBDs与靶向剂结合的共轭物,并提供了使用这种PBDs的方法。
ACTIVATED CARBON FILTRATION FOR PURIFICATION OF BENZODIAZEPINE ADCS
申请人:Seattle Genetics, Inc.
公开号:EP3441072A1
公开(公告)日:2019-02-13
Disclosed are methods of purifying mixtures comprising benzodiazepine antibody-drug conjugates.
所公开的是纯化包含苯并二氮杂卓抗体-药物共轭物的混合物的方法。
ANTI-CMET ANTIBODY DRUG CONJUGATES AND METHODS FOR THEIR USE
申请人:AbbVie Biotherapeutics Inc.
公开号:EP3804765A1
公开(公告)日:2021-04-14
The present disclosure provides antibody drug conjugates that bind human cMET, their methods of making, and their uses to treat patients having cancer.