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DNA Crosslinking Agent (via PBD Dimer) (PBD Dimer Crosslinker)

Target: PBD Dimer Crosslinker
Molecular classification: Small molecule, Synthetic dimer, Alkylating agent

Overview

DNA crosslinking agents, specifically those utilizing pyrrolobenzodiazepine (PBD) dimers, are synthetic molecules designed to form covalent bonds between DNA strands. PBD dimers bind to the minor groove of DNA, preferentially at sequences containing guanine bases, and create interstrand crosslinks that disrupt DNA replication and transcription. These agents are primarily used as payloads in antibody-drug conjugates (ADCs) to selectively target and kill cancer cells by inducing cell cycle arrest and apoptosis. Specific examples include SG2057, SG3199 and SG3249.

Other names: Pyrrolobenzodiazepine DimerPBD DimerInterstrand Crosslinking AgentDNA Alkylating Agent

Mechanism of action

Covalent interstrand DNA minor-groove cross-link formation, specifically targeting guanine bases within PuGATCPy sequences.

Biological functions

DNA crosslinkingInhibition of DNA replicationInhibition of transcriptionCell cycle arrestInduction of apoptosis

Disease associations

Cancer

Safety considerations

Non-specific cytotoxicityPotential for off-target effectsDrug resistance

Interacting drugs

SG2057

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