1. Apoptosis
  2. IAP

Birinapant (Synonyms: TL32711)

Cat. No.: HY-16591 Purity: 99.84%
Handling Instructions

Birinapant a bivalent Smac mimetic, is a potent antagonist for XIAP and cIAP1 with Kd values of 45 nM and < 1 nM, respectively.

For research use only. We do not sell to patients.
Birinapant Chemical Structure

Birinapant Chemical Structure

CAS No. : 1260251-31-7

Size Price Stock Quantity
10 mM * 1 mL in DMSO USD 128 In-stock
5 mg USD 84 In-stock
10 mg USD 144 In-stock
50 mg USD 336 In-stock
100 mg USD 600 In-stock
200 mg   Get quote  
500 mg   Get quote  

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  • Biological Activity

  • Protocol

  • Technical Information

  • Purity & Documentation

  • References


Birinapant a bivalent Smac mimetic, is a potent antagonist for XIAP and cIAP1 with Kd values of 45 nM and < 1 nM, respectively.

IC50 & Target

Kd: 45 nM (XIAP), <1 nM (cIAP1)

In Vitro

Birinapant causes significant degradation of cIAP1 and 2. Birinapant + TRAIL-treated cells show increased levels of active caspase-8 and caspase-3, as well as PARP cleavage, over single agents within 4 h of treatment, indicative of apoptosis-mediated cell death. Birinapan significantly decreases the viability of SUM190 cells in a dose-dependent manner. Birinapant treatment in the XIAP knockdown cell line (SUM190 shXIAP) causes an overall reduction in viability at lower doses (30-300 nM)[1]. Birinapant causes apoptosis in the sensitive cells. Birinapant in conbination with TNF-α, causes PARP cleavage in 451Lu and WM1366 cell lines[2]. Birinapant induces time-course of caspase-3 activation in HCT116 human colon carcinoma and MDA-MB-231 human breast adenocarcinoma cells[3].

In Vivo

Birinapant can inhibit tumor growth in melanoma xenotransplantation models. Staining for activated caspase-3 in biopsies of the same tumors show a modest increase in apoptotic cells in the birinapant treated animals[2]. Birinapant (15 mg/kg, i.p.) induces apoptosis in HCT116 tumor-bearing mouse[3].

Clinical Trial
Preparing Stock Solutions
Concentration Volume Mass 1 mg 5 mg 10 mg
1 mM 1.2392 mL 6.1962 mL 12.3925 mL
5 mM 0.2478 mL 1.2392 mL 2.4785 mL
10 mM 0.1239 mL 0.6196 mL 1.2392 mL
Please refer to the solubility information to select the appropriate solvent.
Cell Assay

Trypan blue exclusion assay is performed as described. Cells are seeded in 6 well plates at 7.5×104 (SUM149) or 1.5×105 (SUM190) cells per well and allowed to adhere overnight. Cells are treated with TRAIL (0-100 ng/mL), Birinapant (0-10,000 nM), GT13402 (0-10,000 nM), TNF-α (50 ng/mL), TNF-α neutralizing antibody (10 μg/mL), pan-caspase inhibitor Q-VD-OPh (20 μM), or a combination as indicated. All treatments are applied for 24 h, and then the cells are trypsinized and resuspended in PBS. Next, 10 μL of cell suspension is added to 10 μL 0.4 % trypan blue, and 10 μL of the mixture is loaded onto a hemocytometer; cells are counted, and live and dead cell numbers are recorded. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration

Birinapant is dissolved in 12.5% Captisol in distilled water.

Ten animals each are inoculated s.c. with 1×106 451Lu or 1205Lu human melanoma cells in a suspension of matrigel/complete media at a ratio of 1:1. After formation of palpable tumors, mice from both tumor models are randomized into two groups. Both groups are treated intraperitoneal three times/week with either vehicle control or birinapant 30 mg/kg for 21 days. Birinapant is dissolved in 12.5% Captisol in distilled water. Tumor size is assessed twice weekly by caliper measurement. Subsequently, satellite groups of ten and fifteen mice are inoculated in the same fashion with 451Lu and 1205Lu tumor cells respectively. After tumors have reached a mean volume of 200 mm3 animals are dosed with either birinapant or vehicle control as described above. After 48 hours and two doses, animals are sacrificed and tumors are harvested at four time points after the last treatment. Tumor samples are snap frozen in liquid nitrogen for subsequent protein analysis and preserved as FFPE blocks for immune-histochemistry. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight







FC1=CC2=C(C=C1)C(C[[email protected]]3N(C([[email protected]@H](NC([[email protected]@H](NC)C)=O)CC)=O)C[[email protected]@H](O)C3)=C(C(N4)=C(C[[email protected]]5N(C([[email protected]@H](NC([[email protected]@H](NC)C)=O)CC)=O)C[[email protected]@H](O)C5)C6=C4C=C(F)C=C6)N2

Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month

Room temperature in continental US; may vary elsewhere

Solvent & Solubility

DMSO: ≥ 40 mg/mL

* "<1 mg/mL" means slightly soluble or insoluble. "≥" means soluble, but saturation unknown.

Purity: 99.84%

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