Toward a pharmacophore for drugs inducing the long QT syndrome: insights from a CoMFA study of HERG K(+) channel blockers.

Article Details

Citation

Cavalli A, Poluzzi E, De Ponti F, Recanatini M

Toward a pharmacophore for drugs inducing the long QT syndrome: insights from a CoMFA study of HERG K(+) channel blockers.

J Med Chem. 2002 Aug 29;45(18):3844-53.

PubMed ID
12190308 [ View in PubMed
]
Abstract

In this paper, we present a pharmacophore for QT-prolonging drugs, along with a 3D QSAR (CoMFA) study for a series of very structurally variegate HERG K(+) channel blockers. The blockade of HERG K(+) channels is one of the most important molecular mechanisms through which QT-prolonging drugs increase cardiac action potential duration. Since QT prolongation is one of the most undesirable side effects of drugs, we first tried to identify the minimum set of molecular features responsible for this action and then we attempted to develop a quantitative model correlating the 3D stereoelectronic characteristics of the molecules with their HERG blocking potency. Having considered an initial set of 31 QT-prolonging drugs for which the HERG K(+) channel blocking activity was measured on mammalian transfected cells, we started the construction of a theoretical screening tool able to predict whether a new molecule can interact with the HERG channel and eventually induce the long QT syndrome. This in silico tool might be useful in the design of new drug candidates devoid of the physicochemical features likely to cause the above-mentioned side effect.

DrugBank Data that Cites this Article

Binding Properties
DrugTargetPropertyMeasurementpHTemperature (°C)
AstemizolePotassium voltage-gated channel subfamily H member 2IC 50 (nM)0.9N/AN/ADetails
AzimilidePotassium voltage-gated channel subfamily H member 2IC 50 (nM)560N/AN/ADetails
BepridilPotassium voltage-gated channel subfamily H member 2IC 50 (nM)550N/AN/ADetails
ChlorpromazinePotassium voltage-gated channel subfamily H member 2IC 50 (nM)1470N/AN/ADetails
CisapridePotassium voltage-gated channel subfamily H member 2IC 50 (nM)6.5N/AN/ADetails
DofetilidePotassium voltage-gated channel subfamily H member 2IC 50 (nM)15N/AN/ADetails
HalofantrinePotassium voltage-gated channel subfamily H member 2IC 50 (nM)196N/AN/ADetails
ImipraminePotassium voltage-gated channel subfamily H member 2IC 50 (nM)3400N/AN/ADetails
LoratadinePotassium voltage-gated channel subfamily H member 2IC 50 (nM)173N/AN/ADetails
PerhexilinePotassium voltage-gated channel subfamily H member 2IC 50 (nM)7800N/AN/ADetails
PimozidePotassium voltage-gated channel subfamily H member 2IC 50 (nM)18N/AN/ADetails
SertindolePotassium voltage-gated channel subfamily H member 2IC 50 (nM)14N/AN/ADetails
TerfenadinePotassium voltage-gated channel subfamily H member 2IC 50 (nM)204N/AN/ADetails
ThioridazinePotassium voltage-gated channel subfamily H member 2IC 50 (nM)35.7N/AN/ADetails