SM-164 is a cell-permeable Smac mimetic compound. SM-164 binds to XIAP protein containing both the BIR2 and BIR3 domains with an IC50 value of 1.39 nM and functions as an extremely potent antagonist of XIAP.
For research use only. We do not sell to patients.
SM-164 Chemical Structure
CAS No. : 957135-43-2
This product is a controlled substance and not for sale in your territory.
Based on 38 publication(s) in Google Scholar
Other Forms of SM-164:
SM-164 hydrochloride
In-stock
SM-164 purchased from MedChemExpress. Usage Cited in:
Biomed Res Int. 2019 Apr 7;2019:2121357.
[Abstract]
The mouse alveolar epithelium cell line MLE12 is exposed to SM-164 for 24h with or without LPS for 24h. RIPK3 and MLKL are downregulated along with the inhibition of cIAP2 by SM-164 during LPS-induced ARDS.
SM-164 purchased from MedChemExpress. Usage Cited in:
Cell Death Dis. 2018 Nov 15;9(12):1140.
[Abstract]
MEF cells are transfected with indicated siRNA for 3 days and then treated with TNF+Smac+zVAD, or poly I:C+zVAD for 3 h.
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cIAP cIAP-1 cIAP-2 XIAP
Description
SM-164 is a cell-permeable Smac mimetic compound. SM-164 binds to XIAP protein containing both the BIR2 and BIR3 domains with an IC50 value of 1.39 nM and functions as an extremely potent antagonist of XIAP.
IC50 & Target[1][2]
cIAP-1
0.31 nM (Ki)
cIAP-2
1.1 nM (Ki)
cIAP
Cellular Effect
Cell Line
Type
Value
Description
References
MDA-MB-231
IC50
0.039 μM
Compound: 7, SM-164
Cytotoxicity against human MDA-MB-231 cells after 72 hrs by MTT assay
Cytotoxicity against human MDA-MB-231 cells after 72 hrs by MTT assay
[PMID: 23062821]
MDA-MB-231
IC50
3.3 nM
Compound: 16, SM-164
Growth inhibition of human MDA-MB-231 cells after 2 to 3 hrs by WST8 assay
Growth inhibition of human MDA-MB-231 cells after 2 to 3 hrs by WST8 assay
[PMID: 21462933]
MDA-MB-231
IC50
6.8 nM
Compound: 6, SM-164
Growth inhibition of human MDA-MB-231 cells after 4 days by WST8 assay
Growth inhibition of human MDA-MB-231 cells after 4 days by WST8 assay
[PMID: 22148838]
SK-OV-3
IC50
16 nM
Compound: 6, SM-164
Growth inhibition of human SKOV3 cells after 4 days by WST8 assay
Growth inhibition of human SKOV3 cells after 4 days by WST8 assay
[PMID: 22148838]
In Vitro
SM-164 is a non-peptide, cell-permeable, bivalent small-molecule, which mimics Smac protein for targeting XIAP. SM-164 binds to XIAP containing both BIR domains with an IC50 value of 1.39 nM, being 300 and 7000-times more potent than its monovalent counterparts and the natural Smac AVPI peptide, respectively. SM-164 concurrently interacts with both BIR domains in XIAP and functions as an ultra-potent antagonist of XIAP in both cell-free functional and cell-based assays. SM-164 targets cellular XIAP and effectively induces apoptosis at concentrations as low as 1 nM in leukemia cancer cells, while having a minimal toxicity to normal human primary cells at 10,000 nM[1]. The binding affinities of SM-164 to XIAP, cIAP-1, and cIAP-2 proteins are determined using fluorescence-polarization based assays. SM-164 has a Ki value of 0.56 nM to XIAP protein containing both BIR2 and BIR3 domains. SM-164 has a Ki value of 0.31 nM to cIAP-1 protein containing both BIR2 and BIR3 domains. SM-164 binds to cIAP-2 BIR3 protein with Ki values of 1.1 nM. Addition of exogenous TNFα can significantly enhance the activity of these Smac mimetics, especially for SM-164, in resistant cancer cell lines such as HCT116 and MDA-MB-453[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
SM-164 Related Antibodies
In Vivo
SM-164 is evaluated for its ability to inhibit tumor growth. SM-164 is highly effective in inhibition of tumor growth and capable of achieving tumor regression in the MDA-MB-231 xenograft model. Treatment with SM-164 at 1 mg/kg completely inhibits tumor growth during the treatment. Treatment with SM-164 at 5 mg/kg reduces the tumor volume from 147±54 mm3 at the beginning of the treatment (day 25) to 54±32 mm3 at the end of the treatment (day 36), a reduction of 65%. The strong antitumor activity by SM-164 is long lasting and not transient. SM-164 at 5 mg/kg is statistically more effective than Taxotere at the end of the treatment (P<0.01) or when the tumor size in the control group reached 750 mm3 (P<0.02)[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Room temperature in continental US; may vary elsewhere.
Storage
Powder
-20°C
3 years
4°C
2 years
In solvent
-80°C
2 years
-20°C
1 year
Solvent & Solubility
In Vitro:
DMSO : 25 mg/mL (22.29 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Preparing Stock Solutions
ConcentrationSolventMass
1 mg
5 mg
10 mg
1 mM
0.8917 mL
4.4586 mL
8.9173 mL
5 mM
0.1783 mL
0.8917 mL
1.7835 mL
10 mM
0.0892 mL
0.4459 mL
0.8917 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.
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.
Solubility: 0.83 mg/mL (0.74 mM); Clear solution; Need ultrasonic
This protocol yields a clear solution of 0.83 mg/mL.
Taking 1 mL working solution as an example, add 100 μLDMSO stock solution (8.3 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.
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.
Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution
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.
[1]. Sun H, et al. Design, synthesis, and characterization of a potent, nonpeptide, cell-permeable, bivalent Smac mimetic that concurrently targets both the BIR2 and BIR3 domains in XIAP. J Am Chem Soc. 2007 Dec 12;129(49):15279-94.
[Content Brief]
[2]. Lu J, et al. SM-164: a novel, bivalent Smac mimetic that induces apoptosis and tumor regression by concurrent removal of the blockade of cIAP-1/2 and XIAP. Cancer Res. 2008 Nov 15;68(22):9384-93.
[Content Brief]
Kinase Assay
[2]
A set of sensitive and quantitative fluorescence polarization (FP)-based assays are developed to determine the binding affinities of our designed Smac mimetics to XIAP BIR3, XIAP containing both BIR2 and BIR3 domains, cIAP-1 BIR3, cIAP-1 containing both BIR2 and BIR3 domains, and cIAP-2 protein. The FP-based assay for XIAP BIR3 protein is measured. Briefly, 5-carboxyfluorescein is coupled to the lysine side chain of a mutated Smac peptide with the sequence (AbuRPFK-Fam) and this fluorescently tagged peptide (named SM5F) is used as the fluorescent tracer in FP-based binding assay to XIAP BIR3. The Kd value of this fluorescent tracer is determined to be 17.9 nM to XIAP BIR3. In competitive binding experiments, a tested compound is incubated with 30 nM of XIAP BIR3 protein and 5 nM of SM5F in the assay buffer (100 mM potassium phosphate, pH 7.5; 100μg/mL bovine gamma globulin; 0.02 % sodium azide)[2].
MCE has not independently confirmed the accuracy of these methods. They are for reference only.
Cell Assay
[2]
HCT116 colon cancer cells are treated with SM-164 (1, 10, and 100 nM) alone, TNFα alone, or the combination for 48 h. Cell growth inhibition is determined by a WST assay[2].
MCE has not independently confirmed the accuracy of these methods. They are for reference only.
Animal Administration
[2]
Mice[2] SCID mice (8-10 per group) bearing MDA-MB-231 xenograft tumors are treated i.v. with 1 and 5 mg/kg of SM-164 or 7.5 mg/kg of Taxotere or vehicle control daily, 5 d/wk for 2 wk. Tumor sizes and animal weights are measured thrice a week[2].
MCE has not independently confirmed the accuracy of these methods. They are for reference only.
References
[1]. Sun H, et al. Design, synthesis, and characterization of a potent, nonpeptide, cell-permeable, bivalent Smac mimetic that concurrently targets both the BIR2 and BIR3 domains in XIAP. J Am Chem Soc. 2007 Dec 12;129(49):15279-94.
[Content Brief]
[2]. Lu J, et al. SM-164: a novel, bivalent Smac mimetic that induces apoptosis and tumor regression by concurrent removal of the blockade of cIAP-1/2 and XIAP. Cancer Res. 2008 Nov 15;68(22):9384-93.
[Content Brief]
[1]. Sun H, et al. Design, synthesis, and characterization of a potent, nonpeptide, cell-permeable, bivalent Smac mimetic that concurrently targets both the BIR2 and BIR3 domains in XIAP. J Am Chem Soc. 2007 Dec 12;129(49):15279-94.
[2]. Lu J, et al. SM-164: a novel, bivalent Smac mimetic that induces apoptosis and tumor regression by concurrent removal of the blockade of cIAP-1/2 and XIAP. Cancer Res. 2008 Nov 15;68(22):9384-93.
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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.
Optional Solvent
ConcentrationSolventMass
1 mg
5 mg
10 mg
25 mg
DMSO
1 mM
0.8917 mL
4.4586 mL
8.9173 mL
22.2932 mL
5 mM
0.1783 mL
0.8917 mL
1.7835 mL
4.4586 mL
10 mM
0.0892 mL
0.4459 mL
0.8917 mL
2.2293 mL
15 mM
0.0594 mL
0.2972 mL
0.5945 mL
1.4862 mL
20 mM
0.0446 mL
0.2229 mL
0.4459 mL
1.1147 mL
SM-164 Related Classifications
Apoptosis
IAPApoptosis
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.
