Date published: 2026-4-1

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IκB-pp40 Inhibitors

IκB-pp40 inhibitors belong to a unique class of molecules primarily known for their ability to interfere with the IκB-pp40 pathway. IκB, or inhibitor of κB, is a family of cellular proteins that play pivotal roles in regulating the nuclear factor κB (NF-κB) signaling pathway. NF-κB is a protein complex that functions as a transcription factor involved in several cellular processes, including inflammation, immunity, and cell survival. Under normal conditions, NF-κB remains in the cytoplasm in an inactive state, bound to its inhibitory protein, IκB. Upon receiving certain cellular stimuli, IκB gets phosphorylated and subsequently degraded, allowing NF-κB to enter the nucleus and initiate transcription of its target genes. The IκB-pp40 protein is a specific post-translationally modified form of IκB, which means that its inhibitors would have unique and specific impacts on this signaling cascade.

IκB-pp40 inhibitors are chemically diverse, and their exact structures and subtypes might vary. This diversity implies that different inhibitors could have varying specificities and modes of action, even if they all ultimately disrupt the same pathway. The discovery and study of these inhibitors have been fueled by a deeper understanding of the NF-κB signaling network and the roles of various IκB proteins within this system. Their inhibition can lead to modulation of NF-κB activity, providing potential insights into cellular response mechanisms. As with any class of inhibitors, understanding the precise mechanisms of action, specificity, and off-target effects is critical in assessing their biological significance and potential utility in various experimental contexts.

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Items 1 to 10 of 11 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

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)

It irreversibly inhibits IκBα phosphorylation by blocking IKK activity. As a result, IκBα remains bound to NF-κB, preventing NF-κB's nuclear translocation and transcriptional activity.

Wedelolactone

524-12-9sc-200648
sc-200648A
1 mg
5 mg
$110.00
$337.00
8
(0)

A coumestan compound, wedelolactone inhibits IKK, preventing the phosphorylation and subsequent degradation of IκB proteins, thus restraining NF-κB activity.

Parthenolide

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

Extracted from feverfew, parthenolide inhibits IKKβ, thus preventing the phosphorylation and degradation of IκBα. This effectively blocks NF-κB activation.

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)

While it has multiple targets, sulforaphane has been shown to inhibit the activation of the NF-κB pathway by impacting IKK, subsequently reducing IκBα phosphorylation.

Emodin

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

Emodin blocks the nuclear translocation of NF-κB by inhibiting the phosphorylation and degradation of IκBα.

Andrographolide

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

Known to inhibit NF-κB activation by forming a covalent adduct with reduced cysteine(62) of p50. It indirectly ensures IκBα remains intact and bound to NF-κB.

Pyrrolidinedithiocarbamic acid ammonium salt

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

A multifunctional compound, PDTC can suppress the activation of NF-κB, potentially by scavenging reactive oxygen species or by directly inhibiting components of the NF-κB pathway, including IKK.

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, MG-132 prevents the degradation of phosphorylated IκBα, leading to accumulation in the cytoplasm and inhibition of NF-κB activation.

Curcumin

458-37-7sc-200509
sc-200509A
sc-200509B
sc-200509C
sc-200509D
sc-200509F
sc-200509E
1 g
5 g
25 g
100 g
250 g
1 kg
2.5 kg
$37.00
$69.00
$109.00
$218.00
$239.00
$879.00
$1968.00
47
(1)

Found in turmeric, curcumin is known to inhibit IKK activation, thereby suppressing IκBα phosphorylation and degradation, which leads to inhibition of NF-κB activity.

Resveratrol

501-36-0sc-200808
sc-200808A
sc-200808B
100 mg
500 mg
5 g
$80.00
$220.00
$460.00
64
(2)

It inhibits NF-κB by multiple mechanisms, one of which includes suppression of IKK activity, thereby preventing the phosphorylation and degradation of IκB proteins.