Date published: 2026-1-16

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IκB-pp40 Activators

IκB-pp40 Activators are a diverse array of chemical compounds that, through various mechanisms, can indirectly enhance the functional degradation of IκB-pp40, leading to the activation of the NF-κB pathway. Anisomycin, for instance, activates JNK signaling which is known to phosphorylate transcription factors that promote IκB-pp40 degradation, thus intensifying NF-κB activity. BAY 11-7082 and TPCA-1 are IκB kinase inhibitors that can paradoxically trigger compensatory pathways resulting in the activation of NF-κB by affecting IκB-pp40 turnover. Similarly, the proteasome inhibitor MG-132 allows for the accumulation of IκB-pp40, which could lead to an enhanced degradation response upon proteasome reactivation. Compounds like Sulforaphane and PDTC modulate the cellular redox state, impacting NF-κB signaling and thus indirectly influencing IκB-pp40 activity. Parthenolide and Andrographolide, which inhibit NF-κB activation, could lead to increased expression of IκB-pp40 as part of a feedback mechanism to maintain signaling homeostasis.

The modulation of NF-κB pathway components appears to be a common theme among IκB-pp40 Activators. SN50 prevents the nuclear translocation of NF-κB, which may result in a greater cytoplasmic retention of IκB-pp40 and amplify its degradation upon activation. CAPE, as an NF-κB inhibitor, might transiently increase IκB-pp40 levels, which upon subsequent degradation, would enhance NF-κB signaling. Helenalin and Emodin, both act as inhibitors of NF-κB, and through the inhibition, they are hypothesized to upregulate IκB-pp40, preparing it for more rapid degradation upon pathway reactivation. These chemicals, by influencing different aspects of the NF-κB/IκB-pp40 regulatory axis, each contribute to the fine-tuning of IκB-pp40 activity and thus the regulation of NF-κB dependent signaling pathways.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Anisomycin

22862-76-6sc-3524
sc-3524A
5 mg
50 mg
$99.00
$259.00
36
(2)

This antibiotic acts as a JNK activator through the disruption of protein synthesis. JNK activation leads to the phosphorylation of specific transcription factors, which can enhance the degradation of IκB-pp40, resulting in the activation of NF-κB.

BAY 11-7082

19542-67-7sc-200615B
sc-200615
sc-200615A
5 mg
10 mg
50 mg
$62.00
$85.00
$356.00
155
(1)

This compound is an IκB kinase inhibitor that prevents IκB phosphorylation, leading to stabilization and subsequent reduction of NF-κB activity. However, this can paradoxically lead to the activation of alternative compensatory pathways that indirectly enhance IκB-pp40 degradation to maintain NF-κB signaling.

MG-132 [Z-Leu- Leu-Leu-CHO]

133407-82-6sc-201270
sc-201270A
sc-201270B
5 mg
25 mg
100 mg
$60.00
$265.00
$1000.00
163
(3)

A proteasome inhibitor that can lead to the accumulation of IκB-pp40 due to blocked degradation. The accumulated IκB-pp40 may then be more readily phosphorylated and degraded upon proteasome reactivation, amplifying NF-κB signaling transiently.

D,L-Sulforaphane

4478-93-7sc-207495A
sc-207495B
sc-207495C
sc-207495
sc-207495E
sc-207495D
5 mg
10 mg
25 mg
1 g
10 g
250 mg
$153.00
$292.00
$489.00
$1325.00
$8465.00
$933.00
22
(1)

This compound activates Nrf2, which can induce the expression of antioxidant response element (ARE)-driven genes. One of these genes could encode a protein that modulates IκB-pp40 activity indirectly by altering the cellular redox state, which impacts NF-κB signaling.

Pyrrolidinedithiocarbamic acid ammonium salt

5108-96-3sc-203224
sc-203224A
5 g
25 g
$33.00
$64.00
11
(1)

As a metal chelator and NF-κB inhibitor, PDTC can indirectly affect IκB-pp40 by modulating the redox-sensitive components of the NF-κB pathway, leading to altered signaling dynamics.

Parthenolide

20554-84-1sc-3523
sc-3523A
50 mg
250 mg
$81.00
$306.00
32
(2)

This sesquiterpene lactone inhibits NF-κB activation through the inhibition of IκB kinase, which can result in increased IκB-pp40 expression as a feedback response to maintain homeostatic NF-κB signaling levels.

Andrographolide

5508-58-7sc-205594
sc-205594A
50 mg
100 mg
$15.00
$40.00
7
(1)

Known to inhibit NF-κB activation, this diterpenoid compound may lead to an upregulation of IκB-pp40 as part of a compensatory mechanism to balance NF-κB signaling.

IKK-2 Inhibitor IV

507475-17-4sc-203083
500 µg
$133.00
12
(1)

An inhibitor of IκB kinase-β (IKK-β), TPCA-1 stabilizes IκB-pp40 by preventing its phosphorylation and subsequent degradation, which may enhance the sensitivity of the NF-κB pathway to activation signals.

Emodin

518-82-1sc-202601
sc-202601A
sc-202601B
50 mg
250 mg
15 g
$105.00
$214.00
$6255.00
2
(1)

A naturally occurring anthraquinone that acts as an inhibitor of IκB kinase, potentially leading to increased levels of IκB-pp40 and enhanced degradation upon reactivation of the NF-κB pathway.