Catalog No.S1231 Synonyms: NSC609699, Nogitecan HCl, SKFS 104864A
Molecular Weight(MW): 457.91
Topotecan HCl is a topoisomerase I inhibitor for MCF-7 Luc cells and DU-145 Luc cells with IC50 of 13 nM and 2 nM in cell-free assays, respectively.
Cited by 10 Publications
2 Customer Reviews
Cells were treated at the same concentrations as in Caspase3/7 assay for 16 hours and total cell lysates were prepared for Western blotting. GAPDH was used as a loading control.
BMC Cancer, 2015, 10.1186/s12885-015-1231-z. Topotecan HCl purchased from Selleck.
Pax3:Foxo1a knockdown increases select chemotherapy sensitivities. MTS assay was performed for Pax3:Foxo1a knockdown mouse aRMS tumor cells treated with DNA damaging agents and microtubule inhibitors. Pax3:Foxo1a knockdown reduced the concentration at which viability was impaired by 50% (IC50) of topotecan by 4.8 fold, respectively, yet did not affect the IC50 of mafosfamide.
PLoS Genet 2014 10(1), e1004107. Topotecan HCl purchased from Selleck.
Purity & Quality Control
Choose Selective Topoisomerase Inhibitors
|Description||Topotecan HCl is a topoisomerase I inhibitor for MCF-7 Luc cells and DU-145 Luc cells with IC50 of 13 nM and 2 nM in cell-free assays, respectively.|
|Features||Topotecan is a water-soluble derivative of camptothecin.|
Stronger drug activity of Topotecan is observed for DU-145 Luc and MCF-7 Luc cells.  Topotecan causes cytotoxicity during the course of DNA replication by stabilizing the covalent complex between topoisomerase I and DNA and preventing the religation of enzyme-linked single-strand DNA break. Topotecan stabilizes topoisomerase I/DNA cleavable complexes in radiation-resistant human B-lineage acute lymphoblastic leukemia (ALL) cells, causes rapid apoptotic cell death despite high-level expression of bcl-2 protein, and inhibits ALL cell clonogenic growth in a dose-dependent fashion. 
|In vivo||Animals inoculate s.c. with DU-145 Luc cells and then treated with Topotecan demonstrates significant tumor growth and regression as measured with calipers and luminescent imaging. The correlation coefficient is 0.75 for the control untreated group and 0.93 for the Topotecan-treated group. Similarly, tumor progression and regression are measurable using luminescent imaging for untreated and Topotecan-treated mice inoculated i.p. with MCF-7 Luc cells.  Topotecan elicited potent antileukemic activity in severe combined immune-deficiency (SCID) mouse models of human poor prognosis ALL. Topotecan markedly improved event-free survival of SCID mice challenged with otherwise fatal doses of humaln leukemia cells at systemic drug exposure levels.  Gliomas preferentially express TRAIL R2 and that treatment with Topotecan significantly up-regulates its expression. |
-  Caceres G, et al. Anticancer Drugs. 2003, 14(7), 569-574.
-  Uckun FM, et al. Blood. 1995. 85(10), 2817-2828.
-  Ciusani E, et al. J Neurooncol. 2005, 71(1), 19-25.
|In vitro||DMSO||91 mg/mL (198.72 mM)|
|Water||91 mg/mL (198.72 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
For best results, use promptly after mixing.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
|Synonyms||NSC609699, Nogitecan HCl, SKFS 104864A|
Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:
Mass (mg) = Concentration (mM) × Volume (mL) × Molecular Weight (g/mol)
*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).
Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )
* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).
Molecular Weight Calculator
Enter the chemical formula of a compound to calculate its molar mass and elemental composition:
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Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Clinical Trial Information
|NCT Number||Recruitment||interventions||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT04022876||Not yet recruiting||Drug: ALRN-6924|Drug: Topotecan||Small-cell Lung Cancer||Aileron Therapeutics||August 2019||Phase 1|Phase 2|
|NCT03927274||Recruiting||Drug: Topotecan||Glioma of Brain||H. Lee Moffitt Cancer Center and Research Institute||April 23 2019||Early Phase 1|
|NCT03107988||Recruiting||Drug: Lorlatinib|Drug: Cyclophosphamide|Drug: Topotecan||Neuroblastoma||New Approaches to Neuroblastoma Therapy Consortium|Pfizer|University of Southern California|Solving Kids'' Cancer US/EU|Children''s Neuroblastoma Cancer Foundation|The Band of Parents|The Evan Foundation|Wade''s Army|Ronan Thompson Foundation|The Catherine Elizabeth Blair Memorial Foundation|Cookies for Kids'' Cancer||September 1 2017||Phase 1|
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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Frequently Asked Questions
I would like get the compound for mice intraperitoneally injection, What would you recommend to improve solubility? What could I use as solvent (%v?) that is nontoxic (unlike Methanol) and could be injected into mice intraperitoneally?
Topotecan HCl is generally prepared by Saline for I.P. administration.