GS143 is a selective IκBα ubiquitination inhibitor with an IC50 of 5.2 μM for SCF-mediated IκBα ubiquitylation. GS143 suppresses NF-κB activation and transcription of target genes and does not inhibit proteasome activity. GS143 has anti-asthma effect.
IC50&Target
IC50: 5.2 μM (SCF-mediated IκBα ubiquitylation)
体外研究
GS143 (10 μM or 20 μM) inhibits antigen-induced differentiation of Th2 cells but not of Th1 cells in vitro. The IL-4 production in Th2-polarizing condition is markedly suppressed by GS143 in a dose-dependent manner.
GS143 suppresses the transcription of TNFα-induced NF-κB with a mean IC50 value of 10.5 μM. GS143 also inhibits TNFα-induced expression of ICAM-1 in HT-29 colon cancer cells with an IC50 value of 6.1 μM. The production levels of TNFα and IL-1β in LPS-activated THP-1 cells are inhibited with IC50 values of 5.3 μM and 2.1 μM, respectively. GS143 does not inhibit p53 and β-catenin.
体内研究
GS143 (16-32 μg/body; intranasal administration; once; BALB/c mice) treatment suppresses antigen-induced NF-κB activation in the lung of sensitized mice. GS143 treatment also inhibits antigen-induced eosinophil and lymphocyte recruitment into the airways and the expression of Th2 cytokines and eotaxin in the airways.
Animal Model:
BALB/c mice (age 7-8weeks) injected with ovalbumin
Dosage:
16 μg/body or 32 μg/body
Administration:
Intranasal administration; once
Result:
Suppressed antigen-induced NF-κB activation in the lung of sensitized mice.
分子式
C28H19FN2O4
分子量
466.46
CAS号
916232-21-8
运输条件
Room temperature in continental US; may vary elsewhere.