Date published: 2025-11-24

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Med18 Inhibitors

Chemical inhibitors of Med18 can exert their inhibitory effects through various mechanisms that disrupt its function within the mediator complex, a critical component in the regulation of gene transcription. Trichostatin A, for example, inhibits histone deacetylases, leading to hyperacetylation of histones; this change can impede the recruitment capabilities and the transcriptional regulation activities of Med18. Similarly, Flavopiridol targets cyclin-dependent kinases whose activity is necessary for phosphorylation of mediator complex subunits; inhibition of these kinases can reduce the functional competency of Med18 in the transcription process. ICG-001 binds selectively to CREB-binding protein, possibly disrupting its interaction with the mediator complex, and thus influencing Med18 activity. Triptolide, by inhibiting RNA Polymerase II, can impede Med18's role in transcriptional facilitation, as it is part of the complex aiding Pol II. Additionally, the chemical inhibitor DRB targets CDK9 and CDK12, which phosphorylate RNA Polymerase II, and their inhibition can prevent Med18 from participating in transcription elongation effectively. Silvestrol, by inhibiting the initiation factor eIF4A, can decrease the synthesis of Med18, leading to its functional inhibition. H-89, a kinase inhibitor, could impede phosphorylation of mediator complex components, affecting the operational state of Med18. C646, by inhibiting the acetyltransferase p300, can reduce the acetylation levels of Med18 or its associated factors, which is critical for its transcriptional regulation function. Bortezomib, through proteasome inhibition, may indirectly inhibit Med18 by sequestering ubiquitin ligases or co-factors essential for its activity. SNS-032's inhibition of CDKs may reduce necessary phosphorylation of Med18, impeding its transcriptional role. MG-132 can cause an accumulation of misfolded proteins, leading to a cellular stress response that may include the inhibition of Med18. Lastly, JQ1's inhibition of BET bromodomain proteins can interfere with Med18's recruitment to acetylated chromatin, thus inhibiting its transcriptional activity.

Items 1 to 10 of 11 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Trichostatin A

58880-19-6sc-3511
sc-3511A
sc-3511B
sc-3511C
sc-3511D
1 mg
5 mg
10 mg
25 mg
50 mg
$149.00
$470.00
$620.00
$1199.00
$2090.00
33
(3)

Trichostatin A inhibits histone deacetylases (HDACs), which could lead to hyperacetylation of histones, potentially disrupting the transcriptional regulation and recruitment capabilities of Med18 within the mediator complex, thereby inhibiting its function.

Flavopiridol Hydrochloride

131740-09-5sc-207687
10 mg
$311.00
(2)

Flavopiridol inhibits cyclin-dependent kinases (CDKs). Since CDKs are involved in the phosphorylation of mediator complex subunits, this could inhibit Med18 function by preventing phosphorylation events that are necessary for its activity in transcription.

Triptolide

38748-32-2sc-200122
sc-200122A
1 mg
5 mg
$88.00
$200.00
13
(1)

Triptolide has been shown to inhibit RNA Polymerase II (Pol II) transcriptional activity. Since Med18 is part of the mediator complex that facilitates Pol II function, triptolide would inhibit Med18 by preventing its role in Pol II driven transcription.

DRB

53-85-0sc-200581
sc-200581A
sc-200581B
sc-200581C
10 mg
50 mg
100 mg
250 mg
$42.00
$185.00
$310.00
$650.00
6
(1)

5,6-Dichlorobenzimidazole 1-β-D-ribofuranoside (DRB) inhibits CDK9 and CDK12, which are involved in the C-terminal domain (CTD) phosphorylation of Pol II. Inhibition here would prevent Med18 from effectively participating in Pol II-mediated transcription elongation.

Silvestrol

697235-38-4sc-507504
1 mg
$920.00
(0)

Silvestrol is an eIF4A translational inhibition agent. By inhibiting translation initiation, it can reduce the overall availability of Med18 by preventing its synthesis, leading to a functional inhibition of the protein's activity.

H-89 dihydrochloride

130964-39-5sc-3537
sc-3537A
1 mg
10 mg
$92.00
$182.00
71
(2)

H-89 is a protein kinase A (PKA) inhibitor. Given PKA's role in various signaling pathways that could phosphorylate components of the mediator complex, inhibiting PKA can impair Med18's function by reducing necessary phosphorylation events.

C646

328968-36-1sc-364452
sc-364452A
10 mg
50 mg
$260.00
$925.00
5
(1)

C646 is a competitive inhibitor of the acetyltransferase p300, which could result in decreased acetylation of Med18 or its associated factors within the mediator complex, leading to impaired function of Med18 in transcriptional regulation.

Bortezomib

179324-69-7sc-217785
sc-217785A
2.5 mg
25 mg
$132.00
$1064.00
115
(2)

Bortezomib inhibits the 26S proteasome, potentially increasing the level of ubiquitinated proteins; this could indirectly lead to the sequestration of ubiquitin ligases or cofactors required for Med18 function, inhibiting its activity.

SNS-032

345627-80-7sc-364621
sc-364621A
5 mg
10 mg
$169.00
$262.00
(1)

SNS-032 is a selective inhibitor of CDKs 2, 7, and 9. By inhibiting these CDKs, it can prevent phosphorylation of the mediator complex subunits, including Med18, thereby inhibiting Med18's role in transcription.

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

133407-82-6sc-201270
sc-201270A
sc-201270B
5 mg
25 mg
100 mg
$56.00
$260.00
$980.00
163
(3)

MG-132 is a proteasome inhibitor that can lead to the accumulation of misfolded proteins, potentially causing a cellular stress response that could include the inhibition of Med18 by diverting cellular resources away from transcriptional activation processes.