Summary of the most clinically relevant ADCs in selected tumour types
Tumour type(s) | ADC | Target antigen | Antibody | Linker | Payload | Features and approvals |
---|---|---|---|---|---|---|
GBM | Depatux-M/ABT-414 | EGFR | Humanized IgG1 | Non-cleavable MC linker | MMAF | Targets mutant EGFRvIII and tumours overexpressing wild-type EGFR [171] |
GBM | AMG 595 | EGFR | Human IgG1 | Non-cleavable MCC linker | DM1 | Targets only EGFRvIII and not wild-type EGFR [98] |
Gastric, CRC | T-DXd/DS-8201 | HER2 | Humanized IgG1 | Cleavable tetrapeptide-based linker | DXd (topoisomerase inhibitor/exatecan derivative) | High DAR of 8 (whilst maintaining stability), novel payload, effective across various histologies, bystander effect [172]. FDA breakthrough designation for GOJ cancer 2020 |
CRC, UC | RC48 | HER2 | Humanized IgG1 (hertuzumab) | Cleavable MC- valyl-citrullinyl-p-aminobenzyloxycarbonyl (MC-val-cit-PABC) linker | MMAE | Higher antibody affinity for HER2, more potent ADCC, bystander effect [39] |
CRC | T-DM1 | HER2 | Humanized IgG1 (trastuzumab) | Cleavable tetrapeptide based (MCC) linker | DM1 | First FDA approved ADC in solid organ tumours, vulnerable to drug efflux and resistance [173] |
UC | SG | Trop-2 | Humanized IgG (hRS7) | Cleavable maleimide based linker (CL2A) | SN-38 (irinotecan metabolite) | High DAR of 7.6, rapid clearance reducing off target toxicity [174]. FDA accelerated approval for UC 2021 [174] |
UC | EV | Nectin-4 | Humanized IgG1 (AGS-22M6) | Cleavable MC valine-citrulline linker | MMAE | FDA accelerated approval 2019 and breakthrough therapy designation with ICI in 2020 for la/mUC [58, 64, 175] |
Prostate | PSMA ADC | PSMA | Human IgG1 | Cleavable MC valine-citrulline linker | MMAE | Future development unknown [73, 74] |
Prostate | MEDI3726 | PSMA | Humanized IgG1 | Cleavable valine-alanine linker | PBD | Development discontinued [75, 176] |
ADCC: antibody-dependent cell-mediated cytotoxicity; MC: maleimidocaproyl; MCC: maleimidomethyl cyclohexane-1-carboxylate
SM, SP and HKG contributed to the drafting and editing of the manuscript. SM created the figures. HKG contributed to conception and design of the review. All authors contributed to manuscript revision, read, and approved the submitted version.
The authors declare that they have no conflicts of interest.
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© The Author(s) 2022.