Date published: 2026-2-13

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caspase-9 Inhibitors

Caspase-9 is a vital enzyme that plays a central role in the regulation of programmed cell death, also known as apoptosis. This protein belongs to the caspase family, which are cysteine proteases primarily responsible for initiating and executing the various stages of apoptosis. Caspase-9 is often referred to as an initiator caspase because it acts upstream in the apoptosis cascade, serving as a key activator of downstream effector caspases. Its primary function is to trigger apoptosis in response to various cellular signals and stresses, including DNA damage, cell cycle defects, and the activation of death receptors. Structurally, caspase-9 exists in an inactive form within cells, and its activation involves a complex series of protein-protein interactions. When cellular conditions warrant apoptosis, caspase-9 is activated through the formation of the apoptosome, a protein complex that includes Apaf-1 and cytochrome c. This activation leads to the cleavage of procaspase-9 into its active form, allowing it to initiate the cascade of events that ultimately leads to cell death. Caspase-9 is a critical regulator of tissue development, homeostasis, and the removal of damaged or infected cells, making it a key player in various physiological and pathological processes. Caspase-9 Inhibitors represent a specific chemical class of compounds designed to selectively target and modulate the activity of caspase-9. These inhibitors are typically small molecules or compounds that are engineered to interfere with the proteolytic activity of caspase-9, preventing its activation and thus impeding the initiation of apoptosis.

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Items 1 to 10 of 12 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Q-VD-OPH

1135695-98-5sc-222230
5 mg
$782.00
5
(1)

Q-VD-OPh is a broad-spectrum caspase inhibitor. It can inhibit caspase-9 activity, preventing downstream apoptotic events.

caspase-9 inhibitor I

210345-04-3sc-3085
sc-3085A
1 mg
5 mg
$416.00
$1769.00
33
(0)

caspase-9 inhibitor I is a cell-permeable, irreversible caspase-9 inhibitor. It binds to the active site of caspase-9, preventing its proteolytic activity.

Caspase-9 Inhibitor III

403848-57-7sc-300327
sc-300327A
1 mg
5 mg
$152.00
$474.00
6
(1)

Caspase-9 Inhibitor III exhibits a selective binding affinity for the active site of caspase-9, disrupting its proteolytic function. This inhibitor alters the enzyme's conformational dynamics, leading to a decrease in its catalytic turnover rate. By forming stable complexes with key residues, it effectively hinders substrate access, thereby modulating apoptotic signaling cascades. Its unique structural features allow for specific interactions that finely tune caspase-9 activity.

Emricasan

254750-02-2sc-507387
5 mg
$90.00
(0)

Emricasan is a pan-caspase inhibitor. It can inhibit caspase-9, among other caspases, preventing apoptosis.

caspase-9 inhibitor II

sc-3086
1 mg
$364.00
1
(0)

Caspase-9 Inhibitor II is characterized by its ability to engage in non-covalent interactions with the caspase-9 enzyme, effectively stabilizing an inactive conformation. This inhibitor influences the enzyme's allosteric sites, resulting in altered substrate binding kinetics. Its distinct molecular architecture facilitates selective interactions that prevent the activation of downstream apoptotic pathways, thereby providing a nuanced modulation of cellular signaling mechanisms.

Apoptosis Inhibitor

54135-60-3sc-205595
10 mg
$160.00
1
(1)

Apoptosis Inhibitor is a specific caspase-9 inhibitor. It binds to and inhibits the proteolytic activity of caspase-9.

Caspase-8 inhibitor II

210344-98-2sc-3084
sc-3084A
1 mg
3 mg
$291.00
$624.00
48
(0)

While Caspase-8 inhibitor II is primarily a caspase-8 inhibitor, it might also influence caspase-9 activity under certain conditions.

β-Estradiol

50-28-2sc-204431
sc-204431A
500 mg
5 g
$63.00
$182.00
8
(1)

Estrogen can exhibit neuroprotective effects and inhibit apoptosis by potentially affecting caspase-9 activation.

Resveratrol

501-36-0sc-200808
sc-200808A
sc-200808B
100 mg
500 mg
5 g
$80.00
$220.00
$460.00
64
(2)

Resveratrol, a polyphenol, has been shown to inhibit apoptosis in various models, potentially by affecting caspase-9 activation.

(−)-Epigallocatechin Gallate

989-51-5sc-200802
sc-200802A
sc-200802B
sc-200802C
sc-200802D
sc-200802E
10 mg
50 mg
100 mg
500 mg
1 g
10 g
$43.00
$73.00
$126.00
$243.00
$530.00
$1259.00
11
(1)

EGCG, a component of green tea, can inhibit apoptosis in certain settings, potentially by affecting caspase-9 activation.