Cloning by functional expression of platelet-activating factor receptor from guinea-pig lung.
Platelet-activating factor (PAF), a unique phospholipid mediator, possesses potent proinflammatory, smooth-muscle contractile and hypotensive activities, and appears to be crucial in the pathogenesis of bronchial asthma and in the lethality of endotoxin and anaphylactic shock. Despite this, little is known of the molecular properties of the PAF receptor and related signal transduction systems. Although several lines of evidence suggest that activation of the PAF receptor stimulates phospholipase C and subsequent inositol trisphosphate formation through G protein(s), the PAF receptor and calcium channel are reported to show a close relation. As a first approach to cloning lipid autacoid receptors, we have isolated complementary DNA for the PAF receptors. Our strategy involved gene expression in Xenopus laevis oocytes and electrophysiological detection of PAF-induced responses. Sequence analysis indicates that the receptor belongs to the superfamily of G protein-coupled receptors.
Honda
Z
Z
Department of Physiological Chemistry and Nutrition, Faculty of Medicine, University of Tokyo, Japan.
Nakamura
M
M
Miki
I
I
Minami
M
M
Watanabe
T
T
Seyama
Y
Y
Okado
H
H
Toh
H
H
Ito
K
K
Miyamoto
T
T
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D004594:Electrophysiology; D019204:GTP-Binding Proteins; D015870:Gene Expression; D006168:Guinea Pigs; D008168:Lung / Q000737:chemistry*; D008969:Molecular Sequence Data; D009865:Oocytes / Q000502:physiology; D010972:Platelet Activating Factor / Q000031:analogs & derivatives / Q000037:antagonists & inhibitors / Q000494:pharmacology; D010980:Platelet Membrane Glycoproteins; D011956:Receptors, Cell Surface / Q000737:chemistry / Q000235:genetics* / Q000502:physiology; D043562:Receptors, G-Protein-Coupled; D012689:Sequence Homology, Nucleic Acid; D014162:Transfection; D014982:Xenopus laevis
D010972:Platelet Activating Factor; D010980:Platelet Membrane Glycoproteins; D011956:Receptors, Cell Surface; D043562:Receptors, G-Protein-Coupled; C039351:platelet activating factor receptor; D004247:DNA; D019204:GTP-Binding Proteins