Topotecan
Back to search| Scientific Name: | Topotecan |
| Brand Name: | Hycamtin |
| Company Owner: | Not Available |
| Mechanism Of Action | Topotecan has the same mechanism of action as irinotecan and is believed to exert its cytotoxic effects during the S-phase of DNA synthesis. Topoisomerase I relieves torsional strain in DNA by inducing reversible single strand breaks. Topotecan binds to the topoisomerase I-DNA complex and prevents religation of these single strand breaks. This ternary complex interferes with the moving replication fork, which leads to the induction of replication arrest and lethal double-stranded breaks in DNA. As mammalian cells cannot efficiently repair these double strand breaks, the formation of this ternary complex eventually leads to apoptosis (programmed cell death) . |
| Description of the Drug: | Topotecan is an antineoplastic agent used to treat ovarian cancer, small cell lung cancer, or cervical cancer. |
| Protein Data Bank: |
Source: DrugBank Online – DrugBank.com. Retrieved 2023-01-23 from https://go.drugbank.com/drugs/DB01030
