基本信息

产品描述

Tanespimycin (17-AAG)是一种有效的HSP90抑制剂，无细胞试验中IC50为5 nM，作用于来自肿瘤细胞的HSP90比作用于来自正常细胞HSP90结合亲和力高100倍。Phase 2。

靶点（IC50 & Targe）

HSP90,5nM

体外研究

17-AAG是格尔德霉素类似物, 但是与过量表达HER-2的癌细胞 (BT474, N87, SKOV3 和SKBR3)或BT474乳腺细胞衍生的Hsp90亲和力高100多倍，IC50为5-6 nM, 而作用于正常人类原代细胞时，IC50为400-943 nM, 因为肿瘤Hsp90 处于多伴复合体状态，具有高ATP酶活性，而正常细胞Hsp90 处于潜在未结合状态, 且直接与那些细胞中17-AAG毒性相关。[1]17-AAG 引起HER2, HER3, Akt，突变和野生型雄激素受体(AR)降解，导致前列腺细胞如LNCaP, LAPC-4, DU-145,和PC-3中RB依赖的 G1 期生长停顿，IC50为25-45 nM。[2]除了诱导改变野生型BCR-ABL的Ba/F3细胞凋亡, IC50为5.2 μM, 17-AAG还通过诱导野生型和突变型 BCR-ABL蛋白降解，而诱导改变抗 Imatinib Mesylate的 T315I和 E255K BCR-ABL突变型细胞生长，IC50分别为2.3 μM 和 1.0 μM。[3]

体内研究

17-AAG作用于携带3T3-src, B16或CT26移植瘤裸鼠，与Hsp90结合具有高亲和力，IC50为8-35 nM，而作用于正常组织时，IC50为200-600 nM。[1] 17-AAG按50 mg/kg左右剂量处理，引起AR, HER2, HER3, 和 Akt表达明显降低，降低达50%以上，这种作用存在剂量依赖性，结果导致雄激素依赖型 (CWR22)和非依赖型(CWR22R 和CWRSA6) 前列腺移植瘤生长受抑制，抑制率分别为67%, 80%和 68%。[2]

激酶实验

Hsp90结合实验:

纯化的Hsp90蛋白或过量表达HER-2的癌细胞(BT474, N87, SKOV3 和 SKBR3) 裂解物或BT474乳腺癌细胞溶于溶解buffer(20 mM HEPES, pH 7.3, 1 mM EDTA, 5 mM MgCl2, 100 mM KCl) ，与不同浓度17-AAG在4oC下温育30分钟，然后和生物素-GM链接的BioMag链霉亲和素磁珠在4oC下温育1小时。试管放置于磁架上,除去未结合的上清液。在溶解buffer中清洗三次磁珠，然后在SDS–PAGE 样本缓冲液中在95oC下加热5分钟。在SDS蛋白凝胶上进行样本分析,使用特点抗体进行Western Blotting。使用Bio-rad Fluor-S 多重图像测量Western Blot条带，计算抑制Hsp90与生物素-GM结合的百分数。测定IC50。

细胞实验

Cell lines: BT474, SKBR3, N87, SKOV3, MCF7, MDA468, Hs578T, Hs578Bst, A549, HT29, U87, SKMG3, HT1080, RPTEC, NDF, HMVEC, HMEC, HUVEC, 和 PBMC

Concentrations: 溶于DMSO, 终浓度为10 μM 左右

Incubation Time: 5天

Method: 细胞按每孔2000个接种在96孔板上，终培养体积为100 μL，培养24小时， 然后加入浓度不断增高的17-AAG，温育5天。使用 Celltiter 96 AQueous 非放射性细胞增殖检测试剂盒测定存活细胞数。测定IC50。

(Only for Reference)

动物实验

Animal Models: 皮下注射雄激素依赖性CWR22移植瘤的雄性 nu/nu 无胸腺小鼠， 皮下注射雄激素非依赖性的CWR22R和CWRSA6移植瘤的雌性nu/nu 无胸腺小鼠。

Formulation: 溶于DMSO, 对照组用蛋磷脂(EPL)稀释

Dosages: 50 mg/kg 左右

Administration: 腹膜注射

(Only for Reference)

参考文献

[1] Kamal A, et al. Nature, 2003, 425(6956), 407-410.

[2] Solit DB, et al. Clin Cancer Res, 2002, 8(5), 986-993.

[3] Gorre ME, et al. Blood, 2002, 100(8), 3041-3044.

安全信息

产品说明

一般描述

A less toxic, potent, synthetic derivative of the ansamycin benzoquinone antibiotic Geldanamycin Streptomyces hygroscopicus (Cat. No. 345805) that binds to Hsp90 (EC₅₀ = 7.2 µM) and regulates its function. Reported to induce apoptosis and exhibit anti-tumor properties (IC₅₀ = 4.1 nM in SKBR3 and 5.2 nM in MCF7 cells). Depletes cancer cells of erbB-1, erbB-2 (EC₅₀ = 45 nM), mutant p53, (EC₅₀ = 62 nM), Raf-1 (EC₅₀ = 80 nM), and Akt. Hence, inhibits the Ras/Raf/MEK and PI3-Kinase signaling pathways. Shown to sensitize cancer cells to Paclitaxel (Cat. No. 580555) and Doxorubicin (Cat. No. 324380), and down-regulates vascular endothelial factor expression.

包装

500 μg in Plastic ampoule
Packaged under inert gas

生化/生理作用

EC50 = 7.2 µM for Hsp90
Product does not compete with ATP.
Reversible: no
Cell permeable: no
Primary Target
Hsp90

警告

Toxicity: Standard Handling (A)

重悬

Following reconstitution aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.

其他说明

Basso, A.D., et al. 2002. Oncogene21, 1159.
Clarke, P.A., et al. 2002. Oncogene19, 4125.
Clarke, P.A., et al. 2000. Oncogene19, 4125.
Schulte, T.W., and Neckers, L.M. 1998. Cancer Chemother. Pharmacol.42, 273.
Schnur, R.C., et al. 1995. J. Med. Chem.38, 3806.

法律信息

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany

基本信息

产品性质

基本信息

安全信息

图形或危害标志
危险性说明	H315: Causes skin irritation. H319: Causes serious eye irritation. H335: May cause respiratory irritation.
防范说明	P233: Keep container tightly closed. P260: Do not breathe . P261: Avoid breathing . P264: Wash hands thoroughly after handling. P271: Use only outdoors or in a well-ventilated area. P280: Wear . P302 + P352: IF ON SKIN: Wash with plenty of soap and water. P304: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.. P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P312: Call a POISON CENTER or doctor/physician if you feel unwell. P321: Specific treatment (see relevant procedures. on this label). P332 + P313: If skin irritation occurs: Get medical advice/ attention. P337 + P313: If eye irritation persists: Get medical advice/attention. P340: Remove victim to fresh air and keep at rest in a position comfortable for breathing. P362: Take off contaminated clothing and wash before reuse. P403: Store in a well-ventilated place. P403 + P233: Store in a well-ventilated place. Keep container tightly closed. P405: Store locked up. P501: Dispose of contents/container to in accordance with local regulation .