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DNA Double Helix Structure Integrity Disruption by Crosslinking at N7 Guanine Positions (N/A)

Target: N/A
Molecular classification: DNA, DNA Adduct, Modified Nucleobase

Overview

Disruption of the DNA double helix structure through chemical crosslinking at the N7 position of guanine bases. This modification is induced by alkylating agents, leading to interference with DNA replication and repair, ultimately triggering apoptosis, especially in rapidly dividing cells. Many chemotherapeutic agents exploit this vulnerability to selectively kill cancer cells.

Other names: Guanine N7 AlkylationDNA Crosslinking at Guanine N7N7-Guanine Adduct FormationDNA Damage by Alkylating AgentsGuanine N7 Modification

Mechanism of action

Induction of DNA crosslinks at guanine N7 positions, leading to replication blockage, impaired repair, and apoptosis.

Biological functions

DNA replicationDNA repairApoptosis inductionGenome stability maintenance

Disease associations

CancerGenomic instability

Safety considerations

Non-specific toxicity to rapidly dividing cellsDevelopment of drug resistanceSecondary malignancies due to off-target alkylationGenotoxicity

Interacting drugs

Alkylating agents (e.g., nitrogen mustards, nitrosoureas, platinum-based drugs)

1 more in the full profile.

Biomarkers

N7-alkylguanine adduct levels in tumor tissueDNA damage response activation markersApoptosis markers

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