stat3 in mda-mb 231 cells

STAT3-IN-B9 (B9) is an inhibitor of abnormal STAT3 activation and inhibits the proliferation of tumor cells including MDA-MB-468, MDA-MB-231, and DU145.

STAT3-IN-1 selective and orally active inhibitor of STAT3(in HT29 and MDA-MB 231 cells, with IC50 values of 1.82 μM and 2.14 μM , respectively), induces tumor apoptosis.

PMMB-187, a selective STAT3 inhibitor, exhibits an IC50 of 1.81 μM in MDA-MB-231 cells. This compound induces apoptosis in MDA-MB-231 cells by inhibiting STAT3 transcriptional activity and nuclear translocation, reducing mitochondrial membrane potential, increasing reactive oxygen species (ROS) production, and upregulating the expression of apoptosis-related proteins. PMMB-187 is useful for research in the field of cancer.

WR-S-462 is a STAT3 inhibitor. It effectively blocks the phosphorylation and biological functions of STAT3 in vitro. The IC50 of WR-S-462 for inhibiting MDA-MB-231 cells is 0.03 μM, and it exhibits a strong binding affinity for STAT3 protein with a Kd of 58 nM. WR-S-462 prevents the nuclear translocation of p-STAT3 and selectively inhibits the expression of p-STAT3Tyr705 in MDA-MB-231 cells, as well as the expression of downstream target genes regulated by STAT3, such as Cyclin D1, Bcl-2, and Bcl-xl. This compound inhibits the growth and metastasis of triple-negative breast cancer (TNBC).

Antitumor agent-195 (compound 16c) is a dual-targeting agent that simultaneously targets STAT3 and NQO1. At a concentration of 1 μM, it significantly inhibits the phosphorylation of STAT3 at the Tyr705 site and effectively induces apoptosis in MDA-MB-231 and MDA-MB-468 breast cancer cells. As a substrate of NQO1, Antitumor agent-195 markedly increases ROS production, causing severe DNA damage in a dose-dependent manner. It also demonstrates strong antitumor properties in MDA-MB-231 xenograft models.

Downregulate phosphorylation of STAT3, increase the expression of cleaved caspase-3, inhibit cell cycle progression and promote apoptosis in breast and pancreatic cancer cells with low micromolar to nanomolar IC50 values. Furthermore, HJC-0123 significantly suppressed estrogen receptor (ER)-negative breast cancer MDA-MB-231 xenograft tumor growth in vivo (p.o.), indicating its great potential as an efficacious and orally bioavailable drug candidate for human cancer therapy.

Nifuroxazide-d4 is intended for use as an internal standard for the quantification of nifuroxazide by GC- or LC-MS. Nifuroxazide is a nitrofuran antibiotic. It is active against strains of the enteropathogenic bacteria C. jejuni, Salmonella, Y. enterocolitica, Shigella, and E. coli. It inhibits quorum sensing and virulence factor production in P. aeruginosa. Nifuroxazide inhibits STAT3 activity in a reporter assay and decreases viability of U266 and INA-6 myeloma cells, which have constitutive STAT3 phosphorylation, with EC50 values of approximately 4.5 µM for both. It also decreases viability, migration, and invasion of, and induces apoptosis in, MCF-7, 4T1, and MDA-MB-231 breast cancer cells. Nifuroxazide reduces tumor growth and prevents pulmonary metastasis in a 4T1 murine mammary carcinoma model. It also reduces diarrhea, weight loss, and colon inflammation in a rat model of acetic acid-induced ulcerative colitis.

JMX0293, an O-alkylamino-tethered salicylamide derivative, demonstrates strong efficacy against the TNBC MDA-MB-231 cell line with an IC50 of 3.38 μM, while showing minimal toxicity towards the non-tumorigenic human breast epithelial cell line MCF-10A, where its IC50 exceeds 60 μM. It inhibits STAT3 phosphorylation, contributing to apoptosis in MDA-MB-231 cells, and significantly suppresses MDA-MB-231 xenograft tumor growth in vivo, all without notable toxicity.