Date published: 2026-5-30

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IP3R-III Inhibitors

The class of IP3R-II inhibitors comprises a diverse array of chemical compounds strategically designed to modulate IP3R-II activity either directly or indirectly through intricate cellular pathways. These inhibitors play crucial roles in influencing cellular processes governed by IP3R-II-regulated calcium signaling, providing valuable tools for dissecting and manipulating intracellular calcium dynamics. 2-APB, as an indirect inhibitor, modulates the intracellular calcium signaling pathway by disrupting calcium release from the endoplasmic reticulum. Xestospongin C stands out as a direct inhibitor of IP3R-II, specifically targeting inositol trisphosphate receptors to hinder calcium release. 8-Bromo-cADPR acts as an indirect inhibitor by modulating the cADPR pathway, disrupting calcium release from intracellular stores and impacting IP3R-II activity. Ruthenium Red is a direct inhibitor that interferes with calcium release from the endoplasmic reticulum, binding to IP3Rs and blocking their calcium channel activity.

The indirect inhibitor 2-ABP modulates the intracellular calcium signaling pathway, inducing IP3R-II desensitization by acting as an IP3R agonist. U-73122 serves as an indirect inhibitor by targeting phospholipase C (PLC), disrupting IP3 production and downstream IP3R-II-mediated calcium release. Dantrolene, a direct inhibitor, interferes with calcium release from the endoplasmic reticulum, binding to the RyR1 receptor and inhibiting IP3R-II activity. MCI-186 acts as an indirect inhibitor by mitigating oxidative stress-induced calcium release, impacting IP3R-II activity. Carvedilol, an indirect inhibitor, modulates the beta-adrenergic signaling pathway, reducing IP3R-II-mediated calcium release. SKF 96365 is an indirect inhibitor that modulates calcium entry from the extracellular space by inhibiting receptor-operated calcium channels (ROCCs), impacting IP3R-II activity. Cytochalasin D, serving as an indirect inhibitor, modulates the actin cytoskeleton, influencing IP3R-II localization and activity. Heparin, an indirect inhibitor, competes with IP3 for binding to IP3R-II, reducing IP3R-II-mediated calcium release.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

2-APB

524-95-8sc-201487
sc-201487A
20 mg
100 mg
$28.00
$53.00
37
(1)

2-APB is a compound that has been widely used as an inhibitor of IP3Rs, including IP3R-III. It can block IP3R channel activity and reduce calcium release from intracellular stores.

Xestospongin C

88903-69-9sc-201505
50 µg
$510.00
14
(1)

Xestospongin C is a compound found in marine sponges. It is known to inhibit IP3R activity and reduce intracellular calcium release.

Dantrolene

7261-97-4sc-500165
25 mg
$350.00
7
(0)

Dantrolene indirectly inhibits IP3R activity by reducing calcium release from the sarcoplasmic reticulum.

SK&F 96365

130495-35-1sc-201475
sc-201475B
sc-201475A
sc-201475C
5 mg
10 mg
25 mg
50 mg
$103.00
$158.00
$397.00
$656.00
2
(1)

SKF-96365 is a synthetic compound that has been used as a broad inhibitor of store-operated calcium channels, which can indirectly affect IP3R-mediated calcium release.

Caffeine

58-08-2sc-202514
sc-202514A
sc-202514B
sc-202514C
sc-202514D
50 g
100 g
250 g
1 kg
5 kg
$33.00
$67.00
$97.00
$192.00
$775.00
13
(1)

Caffeine is known to affect intracellular calcium signaling by promoting the release of calcium from intracellular stores, including the endoplasmic reticulum, which may indirectly impact IP3R-mediated calcium release.

TMB-8 • HCl

53464-72-5sc-3522
sc-3522A
10 mg
50 mg
$43.00
$129.00
10
(1)

TMB-8 is a commonly used inhibitor of intracellular calcium release and can affect IP3R function.

2,5-Di-tert-butyl-1,4-benzoquinone

2460-77-7sc-225728
5 g
$30.00
(0)

2,5-Di-tert-butyl-1,4-benzoquinone is an inhibitor of IP3R-mediated calcium release and has been used in research to study calcium signaling pathways.

Mibefradil dihydrochloride

116666-63-8sc-204083
sc-204083A
10 mg
50 mg
$213.00
$865.00
4
(1)

Mibefradil is a calcium channel blocker that may indirectly affect IP3R-mediated calcium release by altering the overall calcium homeostasis within cells.

Tetracaine

94-24-6sc-255645
sc-255645A
sc-255645B
sc-255645C
sc-255645D
sc-255645E
5 g
25 g
100 g
500 g
1 kg
5 kg
$66.00
$309.00
$500.00
$1000.00
$1503.00
$5000.00
(0)

Tetracaine can inhibit IP3R-mediated calcium release by interacting with the IP3R channel.