Date published: 2025-10-25

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TRα Inhibitors

TRα inhibitors belong to a class of chemical compounds designed to target and modulate the activity of the thyroid hormone receptor alpha (TRα). These receptors are part of the nuclear hormone receptor superfamily, playing a crucial role in the regulation of gene expression in response to thyroid hormones. TRα exists in two isoforms, TRα1 and TRα2, with TRα1 being the more widely studied and expressed isoform. The primary function of TRα is to bind to thyroid hormones, specifically triiodothyronine (T3), and mediate their effects on various physiological processes, including metabolism, growth, and development.

TRα inhibitors work by interfering with the binding of T3 to the receptor, thereby modulating its transcriptional activity. These inhibitors can act as antagonists, stopping the receptor from activating target genes, or as partial agonists, eliciting a less potent response compared to T3. They achieve this by binding to the ligand-binding domain of TRα and altering its conformation, thus inhibiting its ability to bind to thyroid hormones or co-activators required for gene transcription. This modulation of TRα activity can have profound effects on the regulation of gene expression and cellular processes, making TRα inhibitors a valuable tool in studying the role of thyroid hormones in various physiological and pathological contexts.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Amiodarone

1951-25-3sc-480089
5 g
$312.00
(1)

Amiodarone is known to have an inhibitory effect on thyroid hormone synthesis and may indirectly affect TRα expression levels by altering thyroid hormone concentrations.

6-Propyl-2-thiouracil

51-52-5sc-214383
sc-214383A
sc-214383B
sc-214383C
10 g
25 g
100 g
1 kg
$36.00
$55.00
$220.00
$1958.00
(0)

As a thyroid hormone synthesis inhibitor, 6-Propyl-2-thiouracil might reduce the levels of thyroid hormones, subsequently affecting the expression of hormone-dependent receptors like TRα.

4-Hydroxy-2-mercapto-6-methylpyrimidine

56-04-2sc-238861
100 g
$111.00
(0)

4-Hydroxy-2-mercapto-6-methylpyrimidine decreases the availability of thyroid hormones and thus influencing TRα expression.

Methimazole

60-56-0sc-205747
sc-205747A
10 g
25 g
$69.00
$110.00
4
(0)

Methimazole inhibits the synthesis of thyroid hormones, which could lead to a reduction in TRα expression due to lower hormone levels.

Ketoconazole

65277-42-1sc-200496
sc-200496A
50 mg
500 mg
$62.00
$260.00
21
(1)

Ketoconazole can inhibit steroidogenesis and might exert its effect on TRα by reducing thyroid hormone levels indirectly.

Rifampicin

13292-46-1sc-200910
sc-200910A
sc-200910B
sc-200910C
1 g
5 g
100 g
250 g
$95.00
$322.00
$663.00
$1438.00
6
(1)

As an antibiotic, Rifampicin can induce hepatic enzymes that metabolize thyroid hormones, potentially reducing their levels and affecting TRα expression.

Lithium

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

Lithium is known to affect thyroid hormone synthesis and might therefore have an inhibitory effect on the expression of TRα.

Bexarotene

153559-49-0sc-217753
sc-217753A
10 mg
100 mg
$54.00
$245.00
6
(1)

Although primarily a retinoid X receptor (RXR) agonist, bexarotene can affect thyroid hormone levels and may thus alter TRα expression indirectly.