Date published: 2026-4-30

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KCNQ1 Inhibitors

KCNQ1 inhibitors comprise a diverse array of compounds that exert direct or indirect modulation of the potassium channel's activity. Chromanol 293B, HMR 1556, Linopirdine, XE991, L-768673, Clofilium, Retigabine, DPO-1, BMS-204352, JNJ-303, 4-Chlorophenoxyacetic acid, and Linarin represent a selection of these inhibitors, each with a unique mechanism of action. These compounds target specific domains, influence voltage-sensing regions, or impact cellular signaling pathways associated with KCNQ1 activity. Chromanol 293B, for instance, acts as a selective blocker of KCNQ1, disrupting ion flux and influencing cardiac repolarization. In contrast, compounds like Retigabine modulate the channel by interacting with its voltage-sensing domains, promoting cellular repolarization. Additionally, Linarin indirectly affects KCNQ1 by influencing signaling pathways, leading to alterations in channel activity. This diversity in inhibitory mechanisms underscores the intricate interplay between various cellular processes and their collective impact on KCNQ1-mediated cellular responses. Understanding the complex regulation of KCNQ1 is paramount for unraveling the molecular intricacies of cardiac electrophysiology. KCNQ1 inhibitors serves as a valuable resource for researchers, providing insights into potential strategies for modulating KCNQ1 activity and furthering our comprehension of cellular responses associated with its dysregulation. These inhibitors open avenues for exploring the nuanced interconnections between cellular pathways and ion channel modulation, contributing significantly to the advancement of knowledge in cardiovascular physiology.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Chromanol 293B

163163-23-3sc-203889
sc-203889A
10 mg
50 mg
$182.00
$774.00
1
(1)

Chromanol 293B, a selective blocker of KCNQ1, inhibits the voltage-gated potassium channel involved in cardiac repolarization. It modulates the KCNQ1 channel by interacting with its pore-forming subunit, disrupting ion flux and influencing cardiac action potential duration.

Linopirdine dihydrochloride

113168-57-3sc-204058
sc-204058A
10 mg
50 mg
$165.00
$700.00
(1)

Linopirdine, a KCNQ1 blocker, impacts the channel by inhibiting its conductance, influencing the repolarization phase of the cardiac action potential. Through its interaction with KCNQ1, it alters potassium ion flow, leading to changes in membrane potential and cardiac excitability.

Clofilium tosylate

92953-10-1sc-391228
sc-391228A
25 mg
100 mg
$437.00
$1040.00
1
(0)

Clofilium, known for its inhibition of KCNQ1, modulates the channel's activity by interacting with its pore-forming subunit. By impeding potassium flux, it alters the repolarization phase of the cardiac action potential, influencing membrane potential and cellular excitability in cardiac tissues.

DPO-1

43077-30-1sc-203570
sc-203570A
10 mg
50 mg
$170.00
$715.00
(0)

DPO-1, a selective KCNQ1 inhibitor, impacts the channel's function by binding to specific sites, disrupting potassium ion conductance. Its modulation of KCNQ1 alters the repolarization phase of the cardiac action potential, influencing cellular excitability and membrane potential in cardiac tissues.

JNJ 303

878489-28-2sc-361217
sc-361217A
10 mg
50 mg
$412.00
$1686.00
(0)

JNJ-303, a selective KCNQ1 inhibitor, influences the channel by targeting specific regions involved in potassium ion transport. By impeding ion flux, it modulates the repolarization phase of the cardiac action potential, leading to alterations in membrane potential and cellular excitability in cardiac tissues.

4-Chlorophenoxyacetic acid

122-88-3sc-238822
250 g
$68.00
(0)

4-Chlorophenoxyacetic acid indirectly modulates KCNQ1 by affecting cellular signaling pathways involved in channel regulation. Its impact on downstream cascades leads to alterations in KCNQ1 activity, influencing the repolarization phase of the cardiac action potential and cellular excitability in cardiac tissues.

Linarine

480-36-4sc-488995
sc-488995A
sc-488995B
sc-488995C
5 mg
25 mg
50 mg
100 mg
$430.00
$490.00
$740.00
$1240.00
(0)

Linarin, a KCNQ1 modulator, exerts its effects through interactions with signaling pathways associated with channel activity. By indirectly influencing KCNQ1, it alters potassium ion conductance, impacting the repolarization phase of the cardiac action potential and cellular excitability in cardiac tissues.