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C18 H21 I N6 O2 S |
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512.37 |
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in stock |
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873436-91-0 |
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98%+ |
Introduction
U-H71 (1 μM) potently suppresses the growth of triple-negative breast cancers (TNBC) cell lines MDA-MB-468, MDA-MB-231, and HCC-1806 with IC50 of 65, 140 and 87 nM, respectively. PU-H71 (1 μM) kills 80%, 65%, and 80% of the initial population of MDA-MB-468, MDA-MB-231, and HCC-1806 cells, respectively. PU-H71 (0.25-1 μM) induces a dose-dependent degradation or inactivation of tumor driving molecules, including EGFR, IGF1R, HER3, c-Kit, Raf-1and Akt. Treatment for 24 h with 1 μM PU-H71, augments the percent of cells in G2-M phase of MDA-MB-468 to 69%, mediated by reduction in CDK1 and Chk1 expression. PU-H71 induces apoptosis in TNBC in part by inactivation and downregulation of Akt and Bcl-xL. PU-H71 leads to a proteasome-mediated reduction in IRAK-1 and TBK1 levels, resulting in approximately 84% and 90% reduction in NF-κB activity in MDA-MB-231 cells treated with 0.5 and 1μM PU-H71, respectively. PU-H71 markedly contains MDA-MB-231 cell invasion, with 90% suppression at 1 μM. PU-H71 (2.5 μM) generates endoplasmic reticulum (ER) stress and activated the Unfolded Protein Response (UPR) as evidenced by XBP1 mRNA splicing (2.3-fold) and up-regulation of Grp94 (3.7-fold), Grp78 (4.9-fold), and CHOP (48-fold) protein expression and ATF4 (1.8-fold) mRNA expression. PU-H71 (1 μM) induces the mitochondrial pathway of apoptosis in HeLa cells, mediated by caspase but not calpain activation. In response to PU-H71-induced ER stress, apoptosis is triggered in melanoma, cervix, colon, liver and lung cancer cells, but not in normal human fibroblasts. PU-H71 is able to induce apoptosis overcoming the resistance conferred by Bcl-2. PU-H71 (30 n M) significantly reduces NOS2 activity (60% reduction) and expression in LI (1 μg/mL LPS and 5 ng/mL IFN γ)-stimulated astrocytes via inhibiting NF-κB element activation. PU-H71 displays similar effects on microglial cells as on astrocytes, with 50 nM PU-H71 needed to significantly reduce the LPS dependent nitrite release.
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