Ganetespib (STA-9090)

Ganetespib (STA-9090) is an HSP90 inhibitor with IC50 of 4 nM in OSA 8 cells, induces apoptosis of OSA cells while normal osteoblasts are not affected; active metabolite of STA-1474. Phase 3.

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Ganetespib (STA-9090) Chemical Structure

Ganetespib (STA-9090) Chemical Structure
Molecular Weight: 364.4

Validation & Quality Control

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Quality Control & MSDS

Related Compound Libraries

Ganetespib (STA-9090) is available in the following compound libraries:

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Product Description

Biological Activity

Description Ganetespib (STA-9090) is an HSP90 inhibitor with IC50 of 4 nM in OSA 8 cells, induces apoptosis of OSA cells while normal osteoblasts are not affected; active metabolite of STA-1474. Phase 3.
Targets HSP90 [1]
(OSA 8 cells)
IC50 4 nM
In vitro The 50% inhibitory concentrations (IC50) for Ganetespib against malignant mast cell lines are 10-50 times lower than that for 17-AAG, indicating that triazolone class of HSP90 inhibitors likely exhibits greater potency than geldanamycin based inhibitors. [1] Ganetespib inhibits MG63 cell lines with IC50 of 43 nM. [1] Ganetespib binds to the ATP-binding domain at the N-terminus of Hsp90 and serves as a potent Hsp90 inhibitor by causing degradation of multiple oncogenic Hsp90 client proteins including HER2/neu, mutated EGFR, Akt, c-Kit, IGF-1R, PDGFRα, Jak1, Jak2, STAT3, STAT5, HIF-1α, CDC2 and c-Met as well as Wilms' tumor 1. [2] Ganetespib, at low nanomolar concentrations, potently arrests cell proliferation and induces apoptosis in a wide variety of human cancer cell lines, including many receptor tyrosine kinase inhibitor- and tanespimycin-resistant cell lines. Ganetespib exhibits potent cytotoxicity in a range of solid and hematologic tumor cell lines, including those that express mutated kinases that confer resistance to small-molecule tyrosine kinase inhibitors. [3] Ganetespib treatment rapidly caused the degradation of known Hsp90 client proteins, exhibits superior potency to the ansamycin inhibitor 17-AAG, and shows sustained activity even with short exposure times.[3] In anohter study, Ganetespib induces apoptosis of malignant canine mast cell lines. Ganetespib is active at significantly lower concentrations for C2 and BR canine malignant mast cells with IC50 of 19 and 4 nM, respectively, while 17-AAG inhibits C2 and BR canine malignant mast cells with IC50 of 958 and 44 nM, respectively. [4] Both the expression of WT and mutant Kit are downregulated by 100 nM Ganetespib after 24 hours in all lines treated including C2 and BMCMCs cells. However, no effects on PI3K or HSP90 expression are observed following treatment with Ganetespib.[4]
In vivo Administration of Ganetespib leads to significant tumor shrinkage in several tumor xenograft models in mice and appears to be less toxic. Furthermore Ganetespib demonstrated better tumor penetration compared with tanespimycin.[2] Ganetespib inhibits in vivo tumor growth in both malignant mast cell and OSA xenograft models. Ganetespib significantly inhibits tumor growth when dosed with two repeating cycles of 25 mg/kg/day for 3 days, with a %T/C value of 18. Ganetespib is well-tolerated, with the vehicle and Ganetespib groups having average bodyweight changes relative to the start of the study of +0.3% and -8.1% on day 17, respectively.[4]

Protocol(Only for Reference)

Cell Assay: [1]

Cell lines OSA cells
Concentrations 0.001-1μM
Incubation Time 5 days
Method A total of 1.5 × 103 OSA cells are seeded in 96-well plates in 10% serum-containing complete medium and incubated overnight to determine the 50% inhibitory concentrations. Plates are, harvested at day 5 following 0.001, 0.005, 0.01, 0.05, 0.1, 0.5 and 1 μM Ganetespib, treatment and analyzed. Fluorescence measurements are made using a plate reader with excitation at 485 nm and emission detection at 530 nm. Relative cell number is calculated as a percentage of the control wells: absorbance of sample/absorbance of DMSO treated cells × 100.

Animal Study: [4]

Animal Models Female severe combined immune-deficient (SCID) mice
Formulation In DMSO and diluted 1:10 with 20% Cremophor RH 40
Dosages 25 mg/kg/day for 3 days
Administration Tail vein injection

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

SpeciesMouseRatRabbitGuinea pigHamsterDog
Weight (kg)
Body Surface Area (m2)0.0070.0250.
Km factor36128520
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×  mouse Km(3)  = 11.2 mg/kg
rat Km(6)


[1] McCleese Jk, et al. Int J Cancer. 2009, 125(12), 2792-2801.

[2] Wang Y, et al. Curr Opin Investig Drugs. 2010 , 11(12), 1466-1476.

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Clinical Trial Information( data from, updated on 2015-08-29)

NCT Number Recruitment Conditions Sponsor
Start Date Phases
NCT02389751 Recruiting Esophageal Cancer M.D. Anderson Cancer Center|Synta Pharmaceuticals Corp. April 2015 Phase 1
NCT02334319 Recruiting Stage I Hypopharyngeal Squamous Cell Carcinoma|Stage I Laryngeal Squamous Cell Carcinoma|Stage I Oral Cavity Squamous Cell Carcinoma|Stage I Oropha  ...more Stage I Hypopharyngeal Squamous Cell Carcinoma|Stage I Laryngeal Squamous Cell Carcinoma|Stage I Oral Cavity Squamous Cell Carcinoma|Stage I Oropharyngeal Squamous Cell Carcinoma|Stage II Hypopharyngeal Squamous Cell Carcinoma|Stage II Laryngeal Squamous Cell Carcinoma|Stage II Oral Cavity Squamous Cell Carcinoma|Stage II Oropharyngeal Squamous Cell Carcinoma|Stage III Hypopharyngeal Squamous Cell Carcinoma|Stage III Laryngeal Squamous Cell Carcinoma|Stage III Oral Cavity Squamous Cell Carcinoma|Stage III Oropharyngeal Squamous Cell Carcinoma|Stage IVA Hypopharyngeal Squamous Cell Carcinoma|Stage IVA Laryngeal Squamous Cell Carcinoma|Stage IVA Oral Cavity Squamous Cell Carcinoma|Stage IVA Oropharyngeal Squamous Cell Carcinoma Emory University|Synta Pharmaceuticals Corp. December 2014 Phase 0
NCT02261805 Recruiting Cancer|Small Cell Lung Cancer Georgetown University|Synta Pharmaceuticals Corp. October 2014 Phase 1|Phase 2
NCT02272478 Not yet recruiting Acute Myeloid Leukaemia|Myelodysplastic Syndrome Cardiff University|Cancer Research UK October 2014 Phase 3
NCT02192541 Recruiting Neoplasms National Cancer Institute (NCI)|National Institutes of He  ...more National Cancer Institute (NCI)|National Institutes of Health Clinical Center (CC) July 2014 Phase 1

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Chemical Information

Download Ganetespib (STA-9090) SDF
Molecular Weight (MW) 364.4


CAS No. 888216-25-9
Storage 3 years -20℃powder
6 months-80℃in solvent
Synonyms N/A
Solubility (25°C) * In vitro DMSO 40 mg/mL (109.76 mM)
Water <1 mg/mL (<1 mM)
Ethanol <1 mg/mL (<1 mM)
In vivo 1% DMSO/30% polyethylene glycol/1% Tween 80 30 mg/mL
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
Chemical Name 5-(2,4-dihydroxy-5-isopropylphenyl)-4-(1-methyl-1H-indol-5-yl)-2H-1,2,4-triazol-3(4H)-one

Customer Product Validation (1)

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Source Cancer Res 2014 10.1158/0008-5472.CAN-14-1017. Ganetespib (STA-9090) purchased from Selleck
Method Western blot
Cell Lines MDA-MB-231, SKM1, PaTu2, A549, HCT-116 cells
Concentrations 0-1.0 uM
Incubation Time 24 h
Results To investigate whether PRKD2 stability is affected after pharmacologic HSP90 inhibition, eight human cancer cell lines representing six different tumor types (breast cancer, pancreatic cancer, lung cancer, colon cancer, acutemyeloid leukemia, and glioblastoma) were incubated for 24 hours with increasing concentrations of two different compounds: PU-H71, an optimized water soluble member of the purine class of HSP90 inhibitors and STA-9090, a resor-cinol-containing triazole molecule with a novel chemical structure, both unrelated to the geldanamycin class of HSP90 inhibitors. Both inhibitors caused dose-dependent degradation of PRKD2 in all tumor cell lines. STA-9090 was associated with increased apoptosis as revealed by augmented PARP and caspase-9 cleavage in all tumor cell lines.

Product Use Citation (4)

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