2. Cell Cycle/DNA Damage Metabolic Enzyme/Protease
  3. HSP
  4. Pimitespib

Pimitespib (TAS-116) is an oral bioavailable, ATP-competitive, highly specific HSP90α/HSP90β inhibitor (Kis of 34.7 nM and 21.3 nM, respectively) without inhibiting other HSP90 family proteins such as GRP94. Pimitespib demonstrates less ocular toxicity.

For research use only. We do not sell to patients.

Pimitespib Chemical Structure

Pimitespib Chemical Structure

CAS No. : 1260533-36-5

Size Price Stock Quantity
Free Sample (0.1 - 0.5 mg)   Apply Now  
Solid + Solvent
10 mM * 1 mL in DMSO
ready for reconstitution
 USD 94 In-stock
Solution
10 mM * 1 mL in DMSO USD 94 In-stock
Solid
5 mg USD 85 In-stock
10 mg USD 132 In-stock
50 mg USD 460 In-stock
100 mg USD 750 In-stock
200 mg   Get quote  
500 mg   Get quote  

* Please select Quantity before adding items.

This product is a controlled substance and not for sale in your territory.

Customer Review

Based on 2 publication(s) in Google Scholar

Pimitespib Related Antibodies

Top Publications Citing Use of Products

View All HSP Isoform Specific Products:

View All Isoforms
HSP40 HSP70 HSP90 HSP105 HSF1 HSP HSPA5

  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review

Description

Pimitespib (TAS-116) is an oral bioavailable, ATP-competitive, highly specific HSP90α/HSP90β inhibitor (Kis of 34.7 nM and 21.3 nM, respectively) without inhibiting other HSP90 family proteins such as GRP94[1]. Pimitespib demonstrates less ocular toxicity[2].

IC50 & Target[1]

HSP90α

34.7 nM (Ki)

HSP90β

21.3 nM (Ki)

In Vitro

Pimitespib binds not only to the conventional-binding pockets as existing Hsp-90 inhibitors, but also to a novel-binding pocket. Such a unique binding mode makes Pimitespib highly specific for Hsp-90α/β without inhibiting other Hsp-90 family proteins such as GRP94 in endoplasmic reticulum or TRAP-1 in mitochondria[3].
Pimitespib (0-5 μM, 48 hours) inhibits human retinal pigment epithelial ARPE-19 cell lines and NCI-H929 MM cells growth[2].
More significant degradation of p-C-Raf and p-MEK1/2, HSP90 client proteins and key RAS/RAF/MEK pathway regulators, is triggered by Pimitespib (0.125-1 μM, 24 hours) than 17-AAG in INA6 and NCI-H929 MM cells[2].

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

Pimitespib Related Antibodies

Cell Viability Assay[2]

Cell Line: Human retinal pigment epithelial ARPE-19 cell lines and NCI-H929 MM cells
Concentration: 0-5 μM
Incubation Time: 48 hours
Result: Inhibited NCI-H929 MM cells growth with an IC50 of 0.35 μM.

Western Blot Analysis[2]

Cell Line: MM cell lines INA6 and NCI-H929 cells
Concentration: 0.125-1 μM
Incubation Time: 24 hours
Result: Targeted potently HSP90 client proteins including C-Raf and MEK1/2; as well as inhibited upregulation of HSP27 and overcomes 17-AAG resistance mechanisms.
In Vivo

Pimitespib (12.0 mg/kg, p.o., 14 days) shows antitumor activity without inducing eye injury in rats. Pimitespib is distributed less in retina than in plasma in rats; consequently, Pimitespib does not produce any detectable photoreceptor injury[1].
Pimitespib triggers enhanced in vivo anti-MM activities, both alone and in combination with PS-341 (BTZ), with a favorable safety profile. Mice treated with Pimitespib (10 mg/kg and 15 mg/kg, orally, 38 days), BTZ, or Pimitespib plus BTZ show significantly enhance growth inhibition versus the vehicle control group. Median overall survival of treated animals (Pimitespib, orally, 10 mg/kg=33 days, 15 mg/kg=37 days, BTZ=36 days, and the combination=56.5 days) is significantly longer than vehicle control[2].
The favorable pharmacokinetic profile of Pimitespib is reflected in its dose-dependent antitumor activity; the T/C (tumor volume of Pimitespib-treated mice vs. vehicle-treated mice) is 47%, 21%, and 9% for doses of 3.6 mg/kg, 7.1 mg/kg, and 14.0 mg/kg, respectively. Pimitespib is orally absorbed and has a bioavailability of almost 100% in mice, and 69.0% in rats. Pimitespib has moderate terminal elimination half-life (t1/2=8.2 h, 2.5 h, 4.4 h and 2.2 h for mouse (3.6 mg/kg, p.o.), mouse (7.1 mg/kg, p.o.), mouse (14.0 mg/kg, p.o.), rat (4 mg/kg, p.o.)). Pimitespib is more rapidly eliminated from retina (t1/2=3.4 hours) than the other HSP90 inhibitors (t1/2=7.1-19.1 hours)[1].

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

Animal Model: Male F344 nude rats (6 weeks old) with established NCI-H1975 xenografts (6 weeks old)[1]
Dosage: 12.0 mg/kg
Administration: Oral administration; daily; two weeks
Result: Led to tumor shrinkage. Showed antitumor activity without inducing eye injury in rats and did not cause ocular toxicity at the effective dose in the NCI-H1975 rat xenograft model.
Animal Model: CB17 SCID mice (48-54 days old) with murine xenograft model[2]
Dosage: 10 and 15 mg/kg
Administration: Oral administration; 5 days a week; for 28 days
Result: Enhanced significantly growth inhibition versus the vehicle control group. The delay in tumor growth was greater in the combination-treated group compared with either monotherapy cohort.
Animal Model: Mice, Rats, and Dogs[1]
Dosage: 3.0 mg/kg for dogs, 4.0 mg/kg for rats, 3.6, 7.1 and 14.0 mg/kg for mice
Administration: Oral administration; daily; 20 days
Result: Absorbed orally and had a bioavailability of almost 100% in mice, 69.0% in rats, and 73.9% in dogs without special formulation.
Clinical Trial
Molecular Weight

454.53

Formula

C25H26N8O
CAS No.
Appearance

Solid

Color

White to off-white

SMILES

O=C(N)C1=CC=C(N2N=C(C(C)C)C3=C(N4C=C(C5=CN(C)N=C5)N=C4)C=CN=C32)C(CC)=C1
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 1 year
-20°C 6 months
Solvent & Solubility
In Vitro: 

DMSO : 125 mg/mL (275.01 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.2001 mL 11.0004 mL 22.0007 mL
5 mM 0.4400 mL 2.2001 mL 4.4001 mL
View the Complete Stock Solution Preparation Table

* 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, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.08 mg/mL (4.58 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: ≥ 2.08 mg/mL (4.58 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO +
% 
+
%
Tween-80 +
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation

Purity: 99.31%

COA (252 KB) LCMS (267 KB)

Handling Instructions (2659 KB)
References

Complete Stock Solution Preparation Table

* 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, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 2.2001 mL 11.0004 mL 22.0007 mL 55.0019 mL
5 mM 0.4400 mL 2.2001 mL 4.4001 mL 11.0004 mL
10 mM 0.2200 mL 1.1000 mL 2.2001 mL 5.5002 mL
15 mM 0.1467 mL 0.7334 mL 1.4667 mL 3.6668 mL
20 mM 0.1100 mL 0.5500 mL 1.1000 mL 2.7501 mL
25 mM 0.0880 mL 0.4400 mL 0.8800 mL 2.2001 mL
30 mM 0.0733 mL 0.3667 mL 0.7334 mL 1.8334 mL
40 mM 0.0550 mL 0.2750 mL 0.5500 mL 1.3750 mL
50 mM 0.0440 mL 0.2200 mL 0.4400 mL 1.1000 mL
60 mM 0.0367 mL 0.1833 mL 0.3667 mL 0.9167 mL
80 mM 0.0275 mL 0.1375 mL 0.2750 mL 0.6875 mL
100 mM 0.0220 mL 0.1100 mL 0.2200 mL 0.5500 mL
  • No file chosen (Maximum size is: 1024 Kb)
  • If you have published this work, please enter the PubMed ID.
  • Your name will appear on the site.

Pimitespib Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Pimitespib1260533-36-5TAS-116TAS116TAS 116HSPHeat shock proteinsInhibitorinhibitorinhibit

Your Recently Viewed Products:

Inquiry Online

Your information is safe with us. * Required Fields.

Product Name

  

Salutation

Applicant Name *

 

Email Address *

Phone Number *

 

Organization Name *

Department *

 

Requested quantity *

Country or Region *

      

Remarks

Bulk Inquiry

Inquiry Information

Product Name:
Pimitespib
Cat. No.:
HY-15785
Quantity:
MCE Japan Authorized Agent:

Customer Review

Thank You for Your Feedback!

Request for HNMR Report

Please fill out this form to request the QC report. We will send it to your Email address shortly.

Your information is safe with us. * Required Fields.

Product Name

  

Lot #

Applicant Name *

 

Email Address *

Phone Number

 

Department *

Organization Name *

 

Country or Region *

Remarks

Request for HNMR Report

We have received your request and will respond to you as soon as possible.