Date published: 2026-3-17

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TBX5 Activators

TBX5, a vital transcription factor involved in cardiac development and gene regulation, can be influenced by a range of chemical activators that indirectly modulate its activity. These activators play a crucial role in fine-tuning TBX5-mediated processes, such as cardiac morphogenesis and gene transcription. One example is Forskolin, which activates adenylate cyclase, leading to increased levels of cyclic AMP (cAMP). Elevated cAMP levels, in turn, enhance the activity of protein kinase A (PKA), which can phosphorylate transcription factors and co-factors interacting with TBX5. This phosphorylation facilitates the nuclear localization of TBX5 and augments its transcriptional activity on cardiac gene promoters. Similarly, Retinoic Acid can modulate retinoic acid receptors (RARs) that heterodimerize with TBX5. This interaction enhances TBX5's DNA binding ability, leading to increased activation of genes critical for heart septation and limb formation, where TBX5 is essential.

Another group of TBX5 activators includes histone modifiers like VPA (Valproic Acid) and Trichostatin A. These compounds are histone deacetylase (HDAC) inhibitors that promote hyperacetylation of histones, creating a more open chromatin state. This open chromatin conformation facilitate the binding of TBX5 to its target genes, increasing their transcription in heart tissues. Additionally, DNA modifiers like RG108, a DNA methyltransferase inhibitor, may promote demethylation of the TBX5 gene promoter, ultimately enhancing its expression. This higher level of TBX5 can then drive the expression of genes involved in cardiac morphogenesis. Collectively, these chemical activators provide valuable tools for researchers to manipulate TBX5 activity indirectly, offering insights into the intricate regulatory networks governing cardiac development and gene expression.

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Items 1 to 10 of 11 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Forskolin

66575-29-9sc-3562
sc-3562A
sc-3562B
sc-3562C
sc-3562D
5 mg
50 mg
1 g
2 g
5 g
$78.00
$153.00
$740.00
$1413.00
$2091.00
73
(3)

Forskolin activates adenylate cyclase, increasing cAMP levels, which can enhance the PKA-mediated phosphorylation of transcription factors and co-factors interacting with TBX5, facilitating its nuclear localization and transcriptional activity on cardiac gene promoters.

Retinoic Acid, all trans

302-79-4sc-200898
sc-200898A
sc-200898B
sc-200898C
500 mg
5 g
10 g
100 g
$66.00
$325.00
$587.00
$1018.00
28
(1)

Retinoic acid modulates retinoic acid receptors (RARs) that can heterodimerize with TBX5, enhancing its DNA binding and activation of cardiac gene transcription, particularly genes critical for heart septation and limb formation where TBX5 is essential.

Lithium

7439-93-2sc-252954
50 g
$214.00
(0)

Lithium chloride inhibits GSK-3β leading to stabilization and accumulation of β-catenin, a co-factor that can bind to TBX5 and enhance its transcriptional activity on downstream targets involved in cardiac development and function.

Histone Lysine Methyltransferase Inhibitor Inhibitor

935693-62-2 (free base)sc-202651
5 mg
$151.00
4
(1)

BIX-01294 is a histone lysine methyltransferase inhibitor that can alter chromatin structure, potentially leading to an accessible conformation for TBX5 binding and activation of heart-specific gene expression.

Valproic Acid

99-66-1sc-213144
10 g
$87.00
9
(1)

VPA is an HDAC inhibitor that leads to hyperacetylation of histones, promoting a more open chromatin state and potentially facilitating the binding of TBX5 to its target genes, increasing their transcription in heart tissues.

RG 108

48208-26-0sc-204235
sc-204235A
10 mg
50 mg
$131.00
$515.00
2
(1)

RG108, a DNA methyltransferase inhibitor, may promote demethylation of the TBX5 gene promoter, enhancing its expression. Higher levels of TBX5 can then drive the expression of genes involved in cardiac morphogenesis.

SAG

912545-86-9sc-212905
sc-212905A
1 mg
5 mg
$166.00
$421.00
27
(1)

SAG activates the Hedgehog signaling pathway, which intersects with TBX5 in the regulation of cardiac and limb development. Activation of this pathway can lead to the upregulation of TBX5 target genes involved in these processes.

AICAR

2627-69-2sc-200659
sc-200659A
sc-200659B
50 mg
250 mg
1 g
$65.00
$280.00
$400.00
48
(2)

AICAR, an AMPK activator, can enhance cellular energy levels, thereby influencing the cardiac gene expression profile. It can indirectly promote TBX5's activation of genes involved in energy-dependent cardiac functions.

5-Azacytidine

320-67-2sc-221003
500 mg
$280.00
4
(1)

5-Azacytidine can induce DNA demethylation and is known to activate gene expression by this mechanism. It could thus lead to increased TBX5 expression by demethylating regulatory regions of the TBX5 gene, promoting its transcription.

Trichostatin A

58880-19-6sc-3511
sc-3511A
sc-3511B
sc-3511C
sc-3511D
1 mg
5 mg
10 mg
25 mg
50 mg
$152.00
$479.00
$632.00
$1223.00
$2132.00
33
(3)

Trichostatin A, another HDAC inhibitor, may enhance acetylation of histones around the TBX5 gene locus, increasing TBX5 expression and thereby upregulating TBX5-dependent gene activation.