Tanespimycin  (Synonyms: 17-AAG; NSC 330507; CP 127374)

Tanespimycin (17-AAG) is a potent HSP90 inhibitor with an IC₅₀ of 5 nM, having a 100-fold higher binding affinity for tumour cell derived HSP90 than normal cell derived HSP90^[1][5]. Tanespimycin depletes cellular STK38/NDR1 and reduces STK38 kinase activity. Tanespimycin also downregulates the stk38 gene expression^[3].

Tanespimycin causes the degradation of HER2, Akt, and both mutant and wild-type AR and the retinoblastoma-dependent G1 growth arrest of prostate cancer cells. Tanespimycin inhibits prostate cancer cell lines with IC₅₀s ranged from 25-45 nM (LNCaP, 25 nM; LAPC-4, 40 nM; DU-145, 45 nM; and PC-3, 25 nM)^[1].
Tanespimycin (0.1-1 μM) induces a nearly complete loss of ErbB2 on ErbB2-overexpressing breast cancer cells^[2]. Tanespimycin inhibits cell growth and induces G2/M cell cycle arrest and apoptosis in CCA cells together with the down-regulation of Bcl-2, Survivin and Cyclin B1, and the up-regulation of cleaved PARP^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Tanespimycin (25-200 mg/kg, i.p.) causes a dose-dependent decline in AR, HER2, and Akt expression in prostate cancer xenografts. Tanespimycin treatment at doses sufficient to induce AR, HER2, and Akt degradation results in the dose-dependent inhibition of androgen-dependent and -independent prostate cancer xenograft growth without toxicity^[1].
Tanespimycin (60 mg/kg) with Rapamycin (30 mg/kg) inhibits A549 and MDA-MB-231 tumor growth and effects tumor cures in MDA-MB-231 tumor-bearing animals by tail vein injection^[4].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

585.69

C₃₁H₄₃N₃O₈

75747-14-7

Solid

Purple to purplish red

O=C(C(NC(/C(C)=C/C=C\[C@H](OC)[C@H](/C(C)=C/[C@@H]([C@H]([C@H](C[C@@H](C1)C)OC)O)C)OC(N)=O)=O)=CC2=O)C1=C2NCC=C

Room temperature in continental US; may vary elsewhere.

4°C, protect from light

*In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

• [1]. Solit DB, et al. 17-Allylamino-17-demethoxygeldanamycin induces the degradation of androgen receptor and HER-2/neu and inhibits the growth of prostate cancer xenografts.Clin Cancer Res, 2002, 8(5), 986-993.  [Content Brief]

  [2]. Raja, Srikumar M., et al. 17-AAG induces enhanced ubiquitinylation and lysosomal pathway-dependent ErbB2 degradation and cytotoxicity in ErbB2-overexpressing breast cancer cells. Cancer Biology & Therapy (2008), 7(10), 163  [Content Brief]

  [3]. Zhang J, et al. The heat shock protein 90 inhibitor 17-AAG suppresses growth and induces apoptosis in human cholangiocarcinoma cells.Clin Exp Med. 2012 Sep 7.  [Content Brief]

  [4]. Newman B, et al. HSP90 Inhibitor 17-AAG Selectively Eradicates Lymphoma Stem Cells.Cancer Res. 2012 Sep 1;72(17):4551-61. Epub 2012 Jun 29.  [Content Brief]

  [5]. Kamal A, et al. A high-affinity conformation of Hsp90 confers tumour selectivity on Hsp90 inhibitors. Nature. 2003 Sep 25;425(6956):407-10.  [Content Brief]

  [6]. Enomoto A, et al. The HSP90 inhibitor 17-allylamino-17-demethoxygeldanamycin modulates radiosensitivity by downregulating serine/threonine kinase 38 via Sp1 inhibition. Eur J Cancer. 2013 Nov;49(16):3547-58.  [Content Brief]