Mechanisms of Resistance to Antibody–Drug Conjugates

Author:

Abelman Rachel Occhiogrosso1ORCID,Wu Bogang1ORCID,Spring Laura M.1,Ellisen Leif W.1ORCID,Bardia Aditya1

Affiliation:

1. Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA

Abstract

Antibody–drug conjugates (ADCs), with antibodies targeted against specific antigens linked to cytotoxic payloads, offer the opportunity for a more specific delivery of chemotherapy and other bioactive payloads to minimize side effects. First approved in the setting of HER2+ breast cancer, more recent ADCs have been developed for triple-negative breast cancer (TNBC) and, most recently, hormone receptor-positive (HR+) breast cancer. While antibody–drug conjugates have compared favorably against traditional chemotherapy in some settings, patients eventually progress on these therapies and require a change in treatment. Mechanisms to explain the resistance to ADCs are highly sought after, in hopes of developing next-line treatment options and expanding the therapeutic windows of existing therapies. These resistance mechanisms are categorized as follows: change in antigen expression, change in ADC processing and resistance, and efflux of the ADC payload. This paper reviews the recently published literature on these mechanisms as well as potential options to overcome these barriers.

Funder

NRSA T32

Terri Brodeur Breast Cancer Foundation

NCI R01

Publisher

MDPI AG

Subject

Cancer Research,Oncology

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