Date published: 2026-4-17

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HIF-3α Inhibitors

HIF-3α inhibitors consist of a broad range of compounds that interfere with the HIF signaling pathway at different levels, including DNA binding, protein stability, and transcriptional activity. These inhibitors do not target HIF-3α directly but modulate the hypoxia signaling pathway, resulting in reduced HIF-3α activity. For example, echinomycin acts by directly blocking the DNA-binding site of HIF, thus preventing transcriptional activation of hypoxia-responsive genes. Similarly, YC-1 and digoxin disrupt the synthesis and stability of HIF-α subunits, which can lead to a decrease in HIF-3α levels or activity due to the disruption of homeostatic feedback loops within the HIF family.

Some inhibitors, like topotecan and chetomin, target the molecular machinery that HIFs depend on for their transcriptional activity, while others, such as KC7F2 and PX-478, modulate the transcriptional activity of HIFs. SAHA, celastrol, and berberine engage in indirect inhibition through epigenetic modulation or by affecting proteasomal degradation pathways, which impact HIF-3α among a multitude of cellular targets.

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Items 1 to 10 of 12 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Quinomycin A

512-64-1sc-202306
1 mg
$166.00
4
(1)

A small molecule that binds to the hypoxia-response element (HRE) in DNA, blocking the transcriptional activity of HIFs, including HIF-3α, by preventing their binding to the HRE.

2-Methoxyestradiol

362-07-2sc-201371
sc-201371A
10 mg
50 mg
$71.00
$288.00
6
(1)

Although initially considered a potential HIF activator, it also destabilizes microtubules and can suppress HIF transcriptional activity, potentially affecting HIF-3α as well.

YC-1

170632-47-0sc-202856
sc-202856A
sc-202856B
sc-202856C
1 mg
5 mg
10 mg
50 mg
$33.00
$124.00
$218.00
$947.00
9
(1)

Inhibits HIF-1α and potentially other HIF subunits by increasing their degradation and decreasing their synthesis, which may lead to downregulation of HIF-3α through indirect mechanisms or signaling pathways.

Topotecan Hydrochloride

119413-54-6sc-204919
sc-204919A
1 mg
5 mg
$45.00
$102.00
2
(1)

A topoisomerase inhibitor that can reduce HIF-1α levels and might affect HIF-3α indirectly due to the interdependency of the HIF-α subunits within the cellular environment.

Chetomin

1403-36-7sc-202535
sc-202535A
1 mg
5 mg
$186.00
$674.00
10
(1)

Disrupts the interaction between HIF-α subunits and the p300 transcriptional coactivator, potentially reducing HIF-3α activity as a downstream effect.

N,N′-(Dithiodi-2,1-ethanediyl)bis[2,5-dichloro-benzenesulfonamide

927822-86-4sc-497219
25 mg
$330.00
(0)

A small molecule that inhibits HIF-1α transcriptional activity and could similarly affect HIF-3α by attenuating its transcriptional output.

12β-Hydroxydigitoxin

20830-75-5sc-213604
sc-213604A
1 g
5 g
$143.00
$694.00
(0)

Traditionally used for cardiac conditions, 12β-Hydroxydigitoxin can also inhibit HIF-1α synthesis, which might lead to a reduction in HIF-3α levels due to compensatory regulatory mechanisms between HIF subunits.

Acriflavine

8048-52-0sc-214489
sc-214489A
25 g
100 g
$50.00
$171.00
2
(0)

Can interfere with HIF-1α dimerization; though it might lead to compensatory increases in other HIF subunits, it can also inhibit the overall HIF signaling, including HIF-3α under certain conditions.

PX-478

685898-44-6sc-507409
10 mg
$175.00
(0)

Inhibits HIF-1α and can lead to the inhibition of the HIF pathway more broadly, potentially decreasing HIF-3α activity.

Suberoylanilide Hydroxamic Acid

149647-78-9sc-220139
sc-220139A
100 mg
500 mg
$133.00
$275.00
37
(2)

A histone deacetylase inhibitor that affects various transcription factors and might indirectly decrease HIF-3α levels by modifying the acetylation status of chromatin and transcriptional machinery.