1. Cell Cycle/DNA Damage Metabolic Enzyme/Protease
  2. HSP
  3. Apatorsen

Apatorsen is a 2'-methoxyethyl-modified antisense oligonucleotide and also a Hsp27 inhibitor. Apatorsen reduces Hsp27 mRNA and protein levels, impairs stress-induced cytoprotective functions, induces cell apoptosis, inhibits tumor growth and prevents metastasis. Apatorsen is applicable to research related to non-small cell lung cancer, castration-resistant prostate cancer, breast cancer, ovarian cancer and bladder cancer.

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

DNA, d(P-thio)([2′-O-(2-methoxyethyl)]rG-[2′-O-(2-methoxyethyl)]rG-[2′-O-(2-methoxyethyl)]rG-[2′-O-(2-methoxyethyl)]rA-m5C-G-m5C-G-G-m5C-G-m5C-T-m5C-G-G-[2′-O-(2-methoxyethyl)]m5rU-[2′-O-(2-methoxyethyl)]m5rC-[2′-O-(2-methoxyethyl)]rA-[2′-O-(2-methoxyethyl)]m5rU)

Apatorsen Chemical Structure

CAS No. : 1002331-21-6

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Based on 1 publication(s) in Google Scholar

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Description

Apatorsen is a 2'-methoxyethyl-modified antisense oligonucleotide and also a Hsp27 inhibitor. Apatorsen reduces Hsp27 mRNA and protein levels, impairs stress-induced cytoprotective functions, induces cell apoptosis, inhibits tumor growth and prevents metastasis. Apatorsen is applicable to research related to non-small cell lung cancer, castration-resistant prostate cancer, breast cancer, ovarian cancer and bladder cancer[1][2].

In Vitro

Apatorsen (50 nM; 2 days transfection, 48 h erlotinib co-treatment) synergistically enhances erlotinib-induced reduction in cell viability and apoptosis in A549 and HCC827 non-small cell lung cancer cells[1].
Apatorsen (12.5-100 nM (pemetrexed co-treatment); 50 nM (cisplatin, paclitaxel, gemcitabine co-treatment); 2 days treatment, 72 h chemotherapeutic co-incubation) synergistically enhances the cell viability-reducing and pro-apoptotic effects of pemetrexed, cisplatin, paclitaxel, and gemcitabine in A549 non-small cell lung cancer cells[1].

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

Cell Viability Assay[1]

Cell Line: A549, HCC827 non-small cell lung cancer cells
Concentration: 50 nM
Incubation Time: 2 days (transfection); 48 h (erlotinib co-treatment)
Result: Reduced Hsp27 protein expression. Caused greater reduction in cell viability than single-agent treatment when combined with erlotinib. Confirmed a synergistic effect with erlotinib at ED50, ED75, and ED90 for both cell lines. Increased levels of cleaved PARP and cleaved caspase-3 when combined with erlotinib. Increased the subG0 apoptotic cell fraction as measured by flow cytometry when combined with erlotinib.

Cell Viability Assay[1]

Cell Line: A549 non-small cell lung cancer cells
Concentration: 12.5-100 nM (pemetrexed co-treatment); 50 nM (cisplatin, paclitaxel, gemcitabine co-treatment)
Incubation Time: 2 days (OGX-427 treatment); 72 h (chemotherapeutic co-incubation)
Result: Reduced cell viability more than single-agent treatment when combined with pemetrexed. Confirmed synergistic effects with pemetrexed at ED50, ED75, and ED90. Enhanced the cell viability-reducing effects of cisplatin, paclitaxel, and gemcitabine compared to single-agent treatment. Increased levels of cleaved PARP when combined with pemetrexed, cisplatin, paclitaxel, or gemcitabine.
In Vivo

Apatorsen (OGX-427) (15 mg/kg; i.p.; once daily for 7 days then three times weekly; 7 weeks) in combination with erlotinib significantly inhibits A549 xenograft growth and increases tumor apoptosis in male athymic nude mice[1].

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

Animal Model: athymic nude mice (6-8-week-old male; non-small cell lung cancer xenograft model with A549 cells)[1]
Dosage: 15 mg/kg
Administration: i.p.; once daily for 7 days, then three times per week; 7 weeks
Result: Reduced tumor Hsp27 protein levels.
Significantly reduced A549 xenograft growth rates when combined with erlotinib compared to scrambled control plus diluent, scrambled control plus erlotinib, and OGX-427 plus diluent.
Increased average number of TUNEL-positive apoptotic cells when combined with erlotinib compared to control groups.
Molecular Weight

7157.00

CAS No.
Appearance

Solid

Color

White to off-white

Sequence

DNA, d(P-thio)([2′-O-(2-methoxyethyl)]rG-[2′-O-(2-methoxyethyl)]rG-[2′-O-(2-methoxyethyl)]rG-[2′-O-(2-methoxyethyl)]rA-m5C-G-m5C-G-G-m5C-G-m5C-T-m5C-G-G-[2′-O-(2-methoxyethyl)]m5rU-[2′-O-(2-methoxyethyl)]m5rC-[2′-O-(2-methoxyethyl)]rA-[2′-O-(2-methoxyethyl)]m5rU)

SMILES

[Apatorsen]

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

-20°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

Solvent & Solubility
In Vitro: 

H2O : ≥ 20 mg/mL (2.79 mM)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 0.1397 mL 0.6986 mL 1.3972 mL
5 mM --- --- ---
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, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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In Vivo Dissolution Calculator
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
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Working solution concentration: mg/mL
This product has good water solubility, please refer to the measured solubility data in water/PBS/Saline for details.
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).
Purity & Documentation
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, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
H2O 1 mM 0.1397 mL 0.6986 mL 1.3972 mL 3.4931 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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  • 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.

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Apatorsen
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