Priming effect of vasoactive intestinal peptide on the respiratory burst of neutrophils non-mediated by plasma membrane receptors.
Vasoactive intestinal peptide (VIP) primed the respiratory burst of human neutrophils in response to phorbol myristate acetate. Maximal and half-maximal effects were achieved at 10 and 0.5 nM VIP respectively. The absence of plasma membrane receptors to VIP in neutrophils suggests that priming of the respiratory burst should be considered as a side effect of VIP. However, from the above indicated concentration range, the priming of the neutrophil by VIP cannot be considered as a pharmacological effect. The enhancement of the formation of reactive oxygen metabolites by VIP may be important in the pathology of VIP-producing tissues.
López-González
M A
MA
Departamento de Bioquímica Médica y Biología Molecular, Hospital Universitario Virgen Macarena, Facultad de Medicina, Sevilla, Spain.
Lucas
M
M
D000818:Animals; D002462:Cell Membrane / Q000187:drug effects / Q000502:physiology*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D066298:In Vitro Techniques; D007700:Kinetics; D008163:Luminescent Measurements; D008214:Lymphocytes / Q000187:drug effects / Q000502:physiology*; D009504:Neutrophils / Q000187:drug effects / Q000502:physiology*; D051381:Rats; D011956:Receptors, Cell Surface / Q000502:physiology*; D018005:Receptors, Vasoactive Intestinal Peptide / Q000502:physiology; D013481:Superoxides / Q000097:blood; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014660:Vasoactive Intestinal Peptide / Q000494:pharmacology*
D011956:Receptors, Cell Surface; D018005:Receptors, Vasoactive Intestinal Peptide; D013481:Superoxides; D014660:Vasoactive Intestinal Peptide; D013755:Tetradecanoylphorbol Acetate