Exploring the pharmacology of the leukotriene B-4 receptor BLT1, without the confounding effects of BLT2

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Exploring the pharmacology of the leukotriene B-4 receptor BLT1, without the confounding effects of BLT2. / Sabirsh, Alan; Bristulf, Jesper; Owman, Christer.

In: European Journal of Pharmacology, Vol. 499, No. 1-2, 2004, p. 53-65.

Research output: Contribution to journalArticle

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Sabirsh, Alan ; Bristulf, Jesper ; Owman, Christer. / Exploring the pharmacology of the leukotriene B-4 receptor BLT1, without the confounding effects of BLT2. In: European Journal of Pharmacology. 2004 ; Vol. 499, No. 1-2. pp. 53-65.

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TY - JOUR

T1 - Exploring the pharmacology of the leukotriene B-4 receptor BLT1, without the confounding effects of BLT2

AU - Sabirsh, Alan

AU - Bristulf, Jesper

AU - Owman, Christer

PY - 2004

Y1 - 2004

N2 - Most previous studies of leukotriene B-4 (LTB4) pharmacology using primary leukocyte cultures and myeloid cell lines do not differentiate between leukotriene BLT1 and BLT1 receptor activation because both receptors are often expressed by these cells. Here we show that in HeLa cells expressing BLT1 but not BLT2 receptors, BLT1 receptor activation resulted in IP3 mediated calcium release from intracellular stores initially, followed by calcium influx through cell membrane channels. BLT1 calcium signalling was sensitive to the activity of protein kinase C (PKC). protein kinase A (PKA) and protein-tyrosine kinases (PTKs), as well as changes in membrane cholesterol levels and treatments that are known to disrupt normal membrane physiology and/or lipid rafts. Inhibition of MAP kinases, Rho-associated kinases, or phosphomositol-3-kinases (PI3K) had no effect on BLT1 receptor induced calcium signalling, and the receptor was insensitive to the redox state of the extracellular compartment. (C) 2004 Elsevier B.V. All rights reserved.

AB - Most previous studies of leukotriene B-4 (LTB4) pharmacology using primary leukocyte cultures and myeloid cell lines do not differentiate between leukotriene BLT1 and BLT1 receptor activation because both receptors are often expressed by these cells. Here we show that in HeLa cells expressing BLT1 but not BLT2 receptors, BLT1 receptor activation resulted in IP3 mediated calcium release from intracellular stores initially, followed by calcium influx through cell membrane channels. BLT1 calcium signalling was sensitive to the activity of protein kinase C (PKC). protein kinase A (PKA) and protein-tyrosine kinases (PTKs), as well as changes in membrane cholesterol levels and treatments that are known to disrupt normal membrane physiology and/or lipid rafts. Inhibition of MAP kinases, Rho-associated kinases, or phosphomositol-3-kinases (PI3K) had no effect on BLT1 receptor induced calcium signalling, and the receptor was insensitive to the redox state of the extracellular compartment. (C) 2004 Elsevier B.V. All rights reserved.

KW - fura-2

KW - BLT1

KW - leukotriene B-4

KW - g-protein coupled receptor

KW - pharmacology

KW - calcium

U2 - 10.1016/j.ejphar.2004.07.060

DO - 10.1016/j.ejphar.2004.07.060

M3 - Article

VL - 499

SP - 53

EP - 65

JO - European Journal of Pharmacology

T2 - European Journal of Pharmacology

JF - European Journal of Pharmacology

SN - 1879-0712

IS - 1-2

ER -