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| Beta-LapachoneDNA topoisomerase I inhibitor,selective |
Sample solution is provided at 25 µL, 10mM.
Nature.2017 Jan 19;541(7637):417-420.
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Science.2016 Aug 5;353(6299)594-8Nat Nanotechnol.2017 Dec;12(12):1190-1198.Nature Biotechnology.2017 Jun;35(6):569-576Nat Med.2018 Sep 17.Cell.2018 Dec 21. pii: S0092-8674(18)31561-7.Cell.Available online 25 October 2018.Cell.2018 Sep 27. pii: S0092-8674(18)31183-8.Cell.2018 Jun 28;174(1):172-186.e21.Cell.2018 Feb 22;172(5):1007-1021.e17.Cell.2017 Nov 30;171(6):1284-1300.e21.Cell.2017 Aug 17. pii: S0092-8674(17)30869-3.Cell.2017 Jul 13;170(2):312-323Nat Med.2018 Jan 29.Nat Med.2017 Nov;23(11):1342-1351.Cell.2017 Apr 6;169(2):286-300.Cell.2015 Aug 27;162(5):987-1002.Cell.2015 Feb 12;160(4):729-44.Nature Medicine.2017 Apr;23(4):493-500.Cancer Cell.2018 May 14;33(5):905-921.e5.Cancer Cell.2018 Apr 9;33(4):752-769.e8.Cancer Cell.2018 Mar 12;33(3):401-416.e8.Cancer Cell.2017 Aug 14;32(2):253-267.e5.Nat Methods.2018 Jul;15(7):523-526.Cell Stem Cell.2018 May 3;22(5):769-778.e4.Cell Stem Cell.2017 Nov 20. pii: S1934-5909(17)30375-2.Quality Control & MSDS
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- Purity = 99.81%
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Chemical structure
| Description | Beta-Lapachone is a selective inhibitor of DNA topoisomerase I. | |||||
| Targets | IDO1 | Topo I | ||||
| IC50 | 0.44 μM | |||||
| Cell experiment [1]: | |
Cell lines | HL-60, PC-3, DU145 and LNCaP cells |
Preparation method | The solubility of this compound in DMSO is > 10.85 mg/mL. General tips for obtaining a higher concentration: Please warm the tube at 37 °C for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below - 20 °C for several months. |
Reacting condition | 0.005 ~ 50 μM; 12 hrs |
Applications | In H HL-60, PC-3, DU145 and LNCaP cells, Beta-Lapachone at the doses of 1 ~ 5 μM arrested cells in the G0/G1 phase of the cell cycle. Moreover, Beta-Lapachone induced apoptosis before or at the early stage of DNA synthesis, in a p53-independent manner. The mechanism of Beta-Lapachone-induced apoptosis might be through locking Topo I onto DNA and blocking replication fork movement. |
| Animal experiment [2]: | |
Animal models | Nude mice bearing human ovarian cancer 36M2 cells |
Dosage form | 25 ~ 50 mg/kg; i.p. |
Applications | In nude mice bearing human ovarian cancer 36M2 cells, Beta-Lapachone treatment (50 mg/kg) potently inhibited tumor growth. The combination of Beta-Lapachone and Taxol caused a synergistic induction of apoptosis. In addition, mice treated with both drugs appeared to be healthy without reduction in body weight. No gross abnormalities in internal organs were observed from autopsy as well. |
Other notes | Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal. |
References: [1]. Planchon SM, Wuerzberger S, Frydman B, Witiak DT, Hutson P, Church DR, Wilding G, Boothman DA. Beta-lapachone-mediated apoptosis in human promyelocytic leukemia (HL-60) and human prostate cancer cells: a p53-independent response. Cancer Res. 1995 Sep 1;55(17):3706-11. [2]. Li CJ, Li YZ, Pinto AV, Pardee AB. Potent inhibition of tumor survival in vivo by beta-lapachone plus taxol: combining drugs imposes different artificial checkpoints. Proc Natl Acad Sci U S A. 1999 Nov 9;96(23):13369-74. | |
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| Cas No. | 4707-32-8 | SDF | Download SDF |
| Chemical Name | 2,2-dimethyl-3,4-dihydrobenzo[h]chromene-5,6-dione | ||
| Canonical SMILES | CC1(CCC2=C(O1)C3=CC=CC=C3C(=O)C2=O)C | ||
| Formula | C15H14O3 | M.Wt | 242.27 |
| Solubility | ≥10.85mg/mL in DMSO | Storage | Store at -20°C |
| Physical Appearance | A solid | Shipping Condition | Evaluation sample solution : ship with blue ice.All other available size:ship with RT , or blue ice upon request |
| General tips | For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months. | ||
Beta-Lapachone is an inhibitor of DNA topoisomerase I [1].
Beta-Lapachone is found to inhibit the activity of topoisomerase I in a DNA unwinding assay. It inhibits the relaxation at 1μM. The potency of beta-Lapachone can be increased when pretreating topoisomerase I with beta-Lapachone for 5 min at 37°C. Beta-Lapachone is selective for topoisomerase I and shows no inhibition activity for topoisomerase II. Besides, beta-Lapachone is also proved to have no induction in topoisomerase I mediated DNA cleavage [1].
Beta-Lapachone has anti-tumor efficacy in a broad spectrum of human carcinoma cells. It induces cell death of AD2780s, HT-29, DLD, G480 and MCF-7 with IC50 values of 2μM, 5μM, 5μM, 4μM and 2μM, respectively. It is found that beta-Lapachone induces cell death of both apoptosis and necrosis through releasing cytochrome C. Beta-Lapachone is also reported to affect cell cycle. It induces primarily S-phase arrest in SW480 cells, late S- and G2/M-phase arrest in SW620 cells and early S-phase arrest in DLD1 cells [2, 3].
References:[1] Li CJ, Averboukh L, Pardee AB. beta-Lapachone, a novel DNA topoisomerase I inhibitor with a mode of action different from camptothecin. J Biol Chem. 1993 Oct 25;268(30):22463-8.[2] Li YZ, Li CJ, Pinto AV, Pardee AB. Release of mitochondrial cytochrome C in both apoptosis and necrosis induced by beta-lapachone in human carcinoma cells. Mol Med. 1999 Apr;5(4):232-9.[3] Huang L, Pardee AB. beta-lapachone induces cell cycle arrest and apoptosis in human colon cancer cells. Mol Med. 1999 Nov;5(11):711-20.
