Skip to main content
An official website of the United States government
Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

topotecan sustained-release episcleral plaque

An episcleral plaque containing sustained-release (SR) topotecan, a semisynthetic derivative of camptothecin and a cytotoxic, quinoline-based alkaloid extracted from the Asian tree Camptotheca acuminate, with potential antineoplastic activity. Upon local application of the topotecan SR episcleral plaque to the eye, topotecan is released in a sustained manner and inhibits topoisomerase I activity by stabilizing the topoisomerase I-DNA covalent complexes during S phase of cell cycle, thereby inhibiting religation of topoisomerase I-mediated single-strand DNA breaks and producing potentially lethal double-strand DNA breaks when encountered by the DNA replication machinery. The episcleral plaque allows for local delivery of topotecan for the potential treatment of retinoblastoma.
Check for active clinical trials using this agentView this agent in the NCI Thesaurus
Synonym:episcleral topotecan
SR topotecan episcleral plaque
sustained-release episcleral topotecan
sustained-release topotecan episcleral plaque
topotecan SR episcleral plaque
transscleral topotecan
US brand name:Chemoplaque
Search NCI's Drug Dictionary
Please enter up to 30 characters for your search