R&D Systems Inc. Tocris Bioscience Boston Biochem


Cat. No. 1293

b-Lapachone C15H14O3 [4707-32-8]

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Chemical Name: 3,4-Dihydro-2,2-dimethyl-2H-naphtho[1,2-b]pyran-5,6-dione

Biological Activity

DNA topoisomerase I inhibitor. Exhibits a different inhibitory mechanism to camptothecin (Cat. No. 1100). Induces apoptosis in a variety of cell lines, including prostate cancer and promyelocytic leukemia cells; blocks the cell cycle in G0/G1. Also has effects on DNA topoisomerase II, NF-κB, AP-1, and JNK.

Technical Data

Soluble to 100 mM in DMSO and to 50 mM in ethanol
>98 %
Store at +4°C

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
All Tocris products are intended for laboratory research use only.

Certificate of Analysis / Safety Data Sheet

Certificate of Analysis: View current batch
Safety Data Sheet: View Safety Data Sheet


Li et al (1993) Beta-Lapachone, a novel topoisomerase I inhibitor with a mode of action different from camptothecin. J.Biol.Chem. 268 22463. PMID: 8226754.

Wuerzberger et al (1998) Induction of apoptosis in MCF-7:WS8 breast cancer cells by β-Lapachone. Cancer Res. 58 1876. PMID: 9581828.

Manna et al (1999) Suppression of tumor necrosis factor-activated nuclear transcription factor-κB, activator protein-1, c-Jun N-terminal kinase, and apoptosis by β lapachone. Biochem.Pharmacol. 57 763. PMID: 10075082.

Shiah et al (1999) Activation of c-Jun NH2-terminal kinase and subsequent CPP32/Yama during topoisomerase inhibitor β-lapachone-induced apoptosis through an oxidation-dependent pathway Cancer Res. 59 391. PMID: 9927052.

If you know of a relevant citation for this product please let us know.

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Keywords: b-Lapachone, supplier, DNA, topoisomerase, I, inhibitors, apoptosis, proapoptotic, b-lapachone, beta-lapachone, β-lapachone

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