PAF receptors and G-proteins in human blood eosinophils and neutrophils.
Identification of G-proteins and coupling of PAF receptors to G-proteins have been examined in the membranes of human blood eosinophils and neutrophils. Heterotrimeric G-proteins, Gi and GS, were present in both cell types, as demonstrated by immunoblotting and ADP-ribosylation with pertussis toxin. In addition, a group of low molecular mass (18-28 kDa) monomeric G-proteins was also identified. Pertussis toxin and GTP gamma S attenuated the specific binding of [3H]PAF, suggesting the occurrence of coupling between pertussis toxin-sensitive Gi protein and PAF receptors in eosinophils and neutrophils.
Agrawal
D K
DK
Allergic Disease Center, Creighton University School of Medicine, Omaha, NE 68178.
Ali
N
N
Numao
T
T
D000246:Adenosine Diphosphate Ribose / Q000737:chemistry; D015153:Blotting, Western; D004804:Eosinophils / Q000378:metabolism*; D019204:GTP-Binding Proteins / Q000378:metabolism*; D016244:Guanosine 5'-O-(3-Thiotriphosphate) / Q000378:metabolism; D006801:Humans; D009504:Neutrophils / Q000378:metabolism*; D037342:Pertussis Toxin; D010972:Platelet Activating Factor / Q000378:metabolism; D010980:Platelet Membrane Glycoproteins; D011956:Receptors, Cell Surface / Q000378:metabolism*; D043562:Receptors, G-Protein-Coupled; D010566:Virulence Factors, Bordetella
D010972:Platelet Activating Factor; D010980:Platelet Membrane Glycoproteins; D011956:Receptors, Cell Surface; D043562:Receptors, G-Protein-Coupled; D010566:Virulence Factors, Bordetella; C039351:platelet activating factor receptor; D000246:Adenosine Diphosphate Ribose; D016244:Guanosine 5'-O-(3-Thiotriphosphate); D037342:Pertussis Toxin; D019204:GTP-Binding Proteins