1. Immunology/Inflammation Apoptosis
  2. PD-1/PD-L1 Bcl-2 Family MDM-2/p53 Caspase
  3. CSN5-IN-3

CSN5-IN-3 (Compound 30) is a CSN5 inhibitor with an IC50 of 0.58 μM. CSN5-IN-3 inhibits the enzymatic activity of CSN5, leading to increased accumulation of NEDD8-Cul1 and promoting the degradation of PD-L1. CSN5-IN-3 downregulates Bcl-2, and upregulates P53 and Cleaved caspase-3. CSN5-IN-3 exhibits anticancer activity against triple-negative breast cancer.

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CSN5-IN-3

CSN5-IN-3 Chemical Structure

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Description

CSN5-IN-3 (Compound 30) is a CSN5 inhibitor with an IC50 of 0.58 μM. CSN5-IN-3 inhibits the enzymatic activity of CSN5, leading to increased accumulation of NEDD8-Cul1 and promoting the degradation of PD-L1. CSN5-IN-3 downregulates Bcl-2, and upregulates P53 and Cleaved caspase-3. CSN5-IN-3 exhibits anticancer activity against triple-negative breast cancer[1].

IC50 & Target[1]

Caspase 3

 

Bcl-2

 

CSN5

0.58 μM (IC50)

In Vitro

CSN5-IN-3 (20 min) acts as a potent CSN5 inhibitor in cell-free fluorescence polarization assays, with an IC50 of 0.58 μM[1].
CSN5-IN-3 (72 h) potently inhibits the viability of MDA-MB-231 cells, with an IC50 value of 2.1 μM[1].

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

Western Blot Analysis[1]

Cell Line: MDA-MB-231 human triple-negative breast cancer cells
Concentration: 2.5-20 μM (direct treatment); 10 μM (following 2 h preincubation with MG132 or MLN4924)
Incubation Time: 12 h
Result: Dose-dependently increased NEDD8-Cul1 protein levels while not altering CSN5 expression.
Dose-dependently reduced PD-L1 protein levels.
Dose-dependently upregulated P53, and cleaved caspase-3 protein levels.
Dose-dependently downregulated Bcl-2 protein levels.

Cell Cycle Analysis[1]

Cell Line: MDA-MB-231 human triple-negative breast cancer cells
Concentration: 1-10 μM
Incubation Time: 24 h
Result: Caused no significant change in G0/G1 phase cell percentage at 1 μM.
Increased G0/G1 phase cell percentage by 9.6% compared to control at 5 μM (p < 0.01).
Increased G0/G1 phase cell percentage by 18.3% compared to control at 10 μM (p < 0.001).
In Vivo

CSN5-IN-3 (8-16 mg/kg; i.p.; once every 3 days; for 21 consecutive days) exerts potent, dose-dependent in vivo anti-tumor activity against MDA-MB-231 xenografts in mice[1].

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

Animal Model: BALB/c nude (female, 4 weeks old, triple-negative breast cancer subcutaneous xenograft model)[1]
Dosage: 8 mg/kg; 16 mg/kg
Administration: i.p.; every 3 days; 21 days
Result: Achieved 68.3% tumor growth inhibition (TGI) at 8 mg/kg.
Achieved 89.3% tumor growth inhibition (TGI) at 16 mg/kg.
Showed no mortality in either treatment group.
Exhibited no significant body weight changes in the low-dose group; caused a slight temporary body weight decrease but no significant end-of-study weight loss in the high-dose group.
Reduced PD-L1 and Ki67 expression, and increased P21 expression in excised tumors via immunohistochemical analysis.
Molecular Weight

441.57

Formula

C27H31N5O

SMILES

CC1=CC=C(C(C2=CC(OC)=CC=C2)=C1)C3=CC4=C(N3)N=CC=C4NCCN5CCNCC5

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Room temperature in continental US; may vary elsewhere.

Storage

Please store the product under the recommended conditions in the Certificate of Analysis.

Purity & Documentation
References
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    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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CSN5-IN-3
Cat. No.:
HY-181795
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