1. JAK/STAT Signaling Stem Cell/Wnt Cell Cycle/DNA Damage Apoptosis
  2. STAT CDK c-Myc Apoptosis
  3. STAT3-IN-53

STAT3-IN-53 (Compound L20) is a STAT3 inhibitor with a Kd value of 6.16 μM. STAT3-IN-53 binds directly to the SH2 domain of STAT3, inhibits phosphorylation at the Y705 site without affecting the total STAT3 protein level, and suppresses the IL-6/JAK/STAT3 pathway. STAT3-IN-53 downregulates the transcription and expression of cyclin-D1 and c-Myc. STAT3-IN-53 induces cell cycle arrest and promotes Apoptosis. STAT3-IN-53 exhibits anticancer activity against colorectal cancer.

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STAT3-IN-53

STAT3-IN-53 Chemical Structure

CAS No. : 3113051-34-3

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Description

STAT3-IN-53 (Compound L20) is a STAT3 inhibitor with a Kd value of 6.16 μM. STAT3-IN-53 binds directly to the SH2 domain of STAT3, inhibits phosphorylation at the Y705 site without affecting the total STAT3 protein level, and suppresses the IL-6/JAK/STAT3 pathway. STAT3-IN-53 downregulates the transcription and expression of cyclin-D1 and c-Myc. STAT3-IN-53 induces cell cycle arrest and promotes Apoptosis. STAT3-IN-53 exhibits anticancer activity against colorectal cancer[1].

IC50 & Target[1]

STAT3

6.16 μM (Kd)

In Vitro

STAT3-IN-53 directly binds to recombinant full-length wild-type STAT3 protein with a Kd of 6.16 μM[1].
STAT3-IN-53 (concentration gradient) potently inhibits the IL-6/JAK/STAT3 signaling pathway in HEK-BLUE-IL6 cells with an IC50 of 0.89 ± 0.07 μM[1].
STAT3-IN-53 (concentration gradient; 96 h) potently inhibits the proliferation of HCT116, HT29, SW480, MC38, and CT26 colorectal cancer cell lines, with the highest activity in HCT116 cells (IC50 = 0.45 ± 0.05 μM)[1].

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

Cell Proliferation Assay[1]

Cell Line: HCT116, HT29, SW480, MC38, CT26 colorectal cancer cell lines
Concentration: concentration gradient (for IC50 determination)
Incubation Time: 96 h
Result: Exhibited potent antiproliferative activity across all tested colorectal cancer cell lines, with IC50 values of 0.45 ± 0.05 μM (HCT116), 1.80 ± 0.10 μM (HT29), 9.34 ± 0.79 μM (SW480), 2.33 ± 0.48 μM (MC38), and 5.14 ± 0.84 μM (CT26).

Western Blot Analysis[1]

Cell Line: HCT116 cells
Concentration: 0.5, 2.5 μM
Incubation Time: 24 h
Result: Dose-dependently suppressed STAT3 phosphorylation at the Y705 residue without altering total STAT3 protein levels.
Did not inhibit phosphorylation of STAT6 or SRC.
Dose-dependently downregulated cyclin-D1 expression.
In Vivo

STAT3-IN-53 (5-20 mg/kg; i.p.; once daily; 12 days) exerts a dose-dependent inhibitory effect on the growth of subcutaneous MC38 colon adenocarcinoma in C57BL/6J mice[1].

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

Animal Model: C57BL/6J (male, SPF grade, 18-20 g, subcutaneous implantation of MC38 colon adenocarcinoma tumor fragments)[1]
Dosage: 5 mg/kg; 20 mg/kg
Administration: i.p.; once daily; 12 days
Result: Achieved a tumor growth inhibition (TGI) rate of 53.6% at 5 mg/kg.
Achieved a tumor growth inhibition (TGI) rate of 59.8% at 20 mg/kg.
Suppressed STAT3 Y705 phosphorylation in tumor tissues at 20 mg/kg.
Downregulated Cyclin-D1 and c-Myc protein expression in tumor tissues at 20 mg/kg.
Caused no treatment-related adverse events or body weight loss exceeding 10% during the 12-day dosing period.
Molecular Weight

678.73

Formula

C33H33F3N8O3S

CAS No.
SMILES

O=C(OCC)C1=NC=CC(C2=NN=C(NC3=C(N4CCN(CC)CC4)C=C5N(C6CC6)C(C7=CC=C(OC(F)(F)F)C=C7)=NC5=C3)S2)=C1

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

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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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