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Leukotriene receptors C

Unless otherwise stated all data on this page refer to the human proteins. Gene information is provided for human (Hs), mouse (Mm) and rat (Rn).

Overview

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The leukotriene receptors (nomenclature as agreed by the NC-IUPHAR subcommittee on Leukotriene Receptors [6-7]) are activated by the endogenous ligands leukotrienes (LT), synthesized from lipoxygenase metabolism of arachidonic acid. The human BLT1 receptor is the high affinity LTB4 receptor whereas the BLT2 receptor in addition to being a low-affinity LTB4 receptor also binds several other lipoxygenase-products, such as 12S-HETE, 12S-HPETE, 15S-HETE, and the thromboxane synthase product 12-hydroxyheptadecatrienoic acid. The BLT receptors mediate chemotaxis and immunomodulation in several leukocyte populations and are in addition expressed on non-myeloid cells, such as vascular smooth muscle and endothelial cells. In addition to BLT receptors, LTB4 has been reported to bind to the peroxisome proliferator activated receptor (PPAR) α [41] and the vanilloid TRPV1 ligand-gated nonselective cation channel [46]. The crystal structure of the BLT1 receptor was initially determined in complex with selective antagonists [32,47] and has recently been extended to the cryo-electron microscopy structure of LTB4-bound human BLT1 receptor at 2.91 Å resolution [73]. The receptors for the cysteinyl-leukotrienes (i.e. LTC4, LTD4 and LTE4) are termed CysLT1 and CysLT2 and exhibit distinct expression patterns in human tissues, mediating for example smooth muscle cell contraction, regulation of vascular permeability, and leukocyte activation. Quite recently, the the crystal structures of both receptors have been solved, the CysLT1 in complex with zafirlukast and pranlukast [42] and the CysLT2 in complex with three dual CysLT1/CysLT2 antagonists [28]. There is also evidence in the literature for additional CysLT receptor subtypes, derived from functional in vitro studies, radioligand binding and in mice lacking both CysLT1 and CysLT2 receptors [7]. Cysteinyl-leukotrienes have also been suggested to signal through the P2Y12 receptor [21,49,54], GPR17 [14] and GPR99 [37].

Receptors

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BLT1 receptor C Show summary » More detailed page go icon to follow link

BLT2 receptor C Show summary » More detailed page go icon to follow link

CysLT1 receptor C Show summary » More detailed page go icon to follow link

CysLT2 receptor C Show summary » More detailed page go icon to follow link

OXE receptor C Show summary » More detailed page go icon to follow link

FPR2 C Show summary » More detailed page go icon to follow link

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Further reading

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References

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NC-IUPHAR subcommittee and family contributors

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How to cite this family page

Database page citation (select format):

Concise Guide to PHARMACOLOGY citation:

Alexander SPH, Christopoulos A, Davenport AP, Kelly E, Mathie AA, Peters JA, Veale EL, Armstrong JF, Faccenda E, Harding SD, Davies JA et al. (2023) The Concise Guide to PHARMACOLOGY 2023/24: G protein-coupled receptors. Br J Pharmacol. 180 Suppl 2:S23-S144.