Revision 1

#13637Store at -20C

10 mg

Cell Signaling Technology

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For Research Use Only. Not for Use in Diagnostic Procedures.

Background

Camptothecin is a cytotoxic plant alkaloid originally isolated from C. acuminate that inhibits DNA and RNA synthesis in mammalian cells and is an effective anti-tumor agent (1). Research studies indicate that camptothecin inhibits topoisomerase I with an IC50 of 679 nM (2). Camptothecin binds and stabilizes topoisomerase I–DNA cleavage complexes, which leads to DNA strand breaks (1,3,4). The resultant DNA damage can induce cell cycle arrest in many cancer cell lines (5,6). Inactivation of the tumor suppressor protein p53 can increase the cytotoxicity of camptothecin (6).

  1. Hsiang, Y.H. et al. (1985) J Biol Chem 260, 14873-8.
  2. Luzzio, M.J. et al. (1995) J Med Chem 38, 395-401.
  3. Marchand, C. et al. (2006) Mol Cancer Ther 5, 287-95.
  4. Jaxel, C. et al. (1991) J Biol Chem 266, 20418-23.
  5. Jaks, V. et al. (2001) Oncogene 20, 1212-9.
  6. Gupta, M. et al. (1997) Clin Cancer Res 3, 1653-60.

Molecular Formula

C20H16N2O4

Molecular Weight

348.4 g/mol

Purity

>98%

CAS

7689-03-04

Solubility

Soluble in DMSO at 10mg/ml.

Storage

Store lyophilized or in solution at -20ºC, desiccated. In lyophilized form, the chemical is stable for 24 months. Once in solution, use within 3 months to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.

Directions for Use

Camptothecin is supplied as a lyophilized powder. For a 10 mM stock, reconstitute the 10 mg in 2.87 ml DMSO. Working concentrations and length of treatment can vary depending on the desired effect, but it is typically used at 1-10 µM for 1-24 hr.

Background References

    Cross-Reactivity Key

    H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

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    Revision 1
    #13637

    Camptothecin

    Camptothecin: Image 1 Expand Image
    使用 Phospho-p53 (Ser15) Antibody #9284(上图)、p53 (1C12) Mouse mAb #2524(中图)和 β-Actin (D6A8) Rabbit mAb #8457(下图),对未经处理 (-) 或已经规定浓度的 喜树碱(6 小时)处理的 MCF7 细胞的提取物进行蛋白质印迹分析。
    Camptothecin: Image 2 Expand Image
    喜树碱 的化学结构