Date published: 2026-1-11

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CatSper4 Inhibitors

CatSper4 inhibitors are a class of chemical compounds specifically designed to target and inhibit the function of the CatSper4 protein, a critical subunit of the CatSper (cation channel of sperm) ion channel complex. The CatSper channel is a unique calcium ion channel that is exclusively expressed in the plasma membrane of sperm cells, where it plays a crucial role in sperm motility and the ability of sperm to fertilize an egg. CatSper4, along with other subunits of the CatSper complex, forms the pore of the channel that allows the influx of calcium ions into the sperm cell. This calcium influx is essential for the regulation of sperm motility, hyperactivation, and the acrosome reaction, all of which are critical for successful fertilization. Inhibitors of CatSper4 function by binding to specific regions of the CatSper4 subunit or the channel complex, thereby preventing the normal flow of calcium ions through the channel. By inhibiting CatSper4, these compounds disrupt the normal calcium signaling within sperm cells, leading to impaired sperm motility and a reduction in the ability of sperm to undergo hyperactivation. This inhibition can result in a failure to effectively navigate through the female reproductive tract or to penetrate the egg's protective layers, ultimately leading to reduced fertilization potential. Understanding the effects of CatSper4 inhibition provides valuable insights into the molecular mechanisms that regulate sperm function and fertility. Additionally, studying these inhibitors helps elucidate the role of calcium signaling in sperm physiology and offers a deeper understanding of the complex processes involved in fertilization. This knowledge is crucial for advancing our understanding of reproductive biology and the specific ion channels that are essential for the proper functioning of sperm cells.

Items 1 to 10 of 12 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Mifepristone

84371-65-3sc-203134
100 mg
$61.00
17
(1)

Mifepristone could downregulate CatSper4 by blocking progesterone receptors, thus hindering the hormonal signal transduction necessary for the maintenance of CatSper4 gene transcription within sperm cells.

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 may decrease CatSper4 expression by inhibiting histone deacetylases, which would result in a less condensed chromatin state around the CatSper4 gene, potentially leading to a suppression of its transcription.

5-Azacytidine

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

This compound could reduce expression of CatSper4 by inhibiting DNA methyltransferases, leading to hypomethylation of the gene's promoter region and subsequent transcriptional repression of the gene.

Ketoconazole

65277-42-1sc-200496
sc-200496A
50 mg
500 mg
$63.00
$265.00
21
(1)

Ketoconazole may inhibit CatSper4 expression by impairing steroid synthesis, specifically reducing the levels of hormones that are crucial for the transcriptional activation of the CatSper4 gene.

Flutamide

13311-84-7sc-204757
sc-204757A
sc-204757D
sc-204757B
sc-204757C
1 g
5 g
25 g
500 g
1 kg
$47.00
$156.00
$171.00
$525.00
$941.00
4
(1)

Flutamide has the potential to decrease CatSper4 expression by competitively binding to androgen receptors, thereby obstructing the androgenic stimulation necessary for the gene's expression in spermatozoa.

Fenvalerate

51630-58-1sc-24014
sc-24014A
25 mg
100 mg
$80.00
$231.00
2
(1)

Fenvalerate could downregulate CatSper4 through neurotoxic effects that alter intracellular signaling pathways, potentially leading to a decrease in the transcriptional activity of the gene encoding for the CatSper4 protein.

Cadmium chloride, anhydrous

10108-64-2sc-252533
sc-252533A
sc-252533B
10 g
50 g
500 g
$56.00
$183.00
$352.00
1
(1)

Cadmium chloride may reduce the expression of CatSper4 by inducing oxidative stress, which can trigger a cascade of cellular events culminating in the repression of transcription for certain calcium channel-related genes.

Lead(II) Acetate

301-04-2sc-507473
5 g
$85.00
(0)

Lead acetate could inhibit the expression of CatSper4 by causing epigenetic changes that lead to the silencing of the gene or by interfering with the binding of transcription factors to the gene's promoter region.

Thapsigargin

67526-95-8sc-24017
sc-24017A
1 mg
5 mg
$136.00
$446.00
114
(2)

Thapsigargin might decrease CatSper4 expression by disrupting the endoplasmic reticulum calcium gradient, which is a critical secondary messenger in the signaling pathways that govern the transcription of many genes, including CatSper4.

Vinclozolin

50471-44-8sc-251425
250 mg
$23.00
1
(1)

Vinclozolin could inhibit the expression of CatSper4 by acting as an antagonist to androgen receptors, which play a role in the transcriptional regulation of genes involved in spermatogenesis and sperm function.