Varies depending on chemotherapeutic agent used; common targets include Topoisomerase II, DNA, and microtubules

Chemotherapeutic regimens exploit vulnerabilities in tumor cells by targeting essential components of cell proliferation: topoisomerase II (required for DNA replication and chromosome segregation), microtubules (critical for cell division and cytoskeletal integrity), and DNA itself (through chemical modification and damage). Drugs select their specific targets, interfering with biological functions necessary for tumor growth, and their efficacy can be tracked via DNA damage biomarkers and molecular profiling. Resistance and toxicity remain major clinical challenges.

Other names

Chemotherapeutic targetsAnticancer drug targets (general)

Chemotherapeutic agents act by inhibiting enzyme activity (e.g., etoposide targeting topoisomerase II), intercalating into DNA leading to stabilized DNA-topoisomerase II complexes and double-strand breaks (e.g., doxorubicin), stabilizing or destabilizing microtubule dynamics leading to mitotic arrest or apoptosis, forming DNA crosslinks/adducts (e.g., cisplatin), or by alkylation and methylation of DNA bases (e.g., alkylating agents). These actions disrupt DNA replication, transcription, and cell division, ultimately leading to cell cycle arrest and apoptosis.