Des-Arg9-bradykinin increases intracellular Ca2+ in bronchoalveolar eosinophils from ovalbumin-sensitized and -challenged mice

Eur J Pharmacol. 2003 Aug 15;475(1-3):129-37. doi: 10.1016/s0014-2999(03)02108-3.


The effects of the selective bradykinin B1 receptor agonist, des-Arg9-bradykinin and the bradykinin B2 receptor agonist, bradykinin were studied on the intracellular free Ca2+ concentration ([Ca2+]i) in murine bronchoalveolar lavage cells from control and ovalbumin-sensitized mice using fura-2 microfluorimetry. The bronchoalveolar lavage cells of control mice, which were predominantly alveolar macrophages, showed an increase in [Ca2+]i in response to bradykinin (1 microM) but not to des-Arg9-bradykinin (1 microM), indicating the presence of functional bradykinin B2 receptors and the absence of B1 receptors. Such elevation in [Ca2+]i induced by bradykinin was totally inhibited by the selective bradykinin B2 receptor antagonist, D-Arg0-Hyp3-Thi5-D-Tic7-Oic8-bradykinin (HOE-140; 10 microM). In contrast, bronchoalveolar lavage cells from ovalbumin-sensitized and -challenged mice significantly responded to both bradykinin and des-Arg9-bradykinin, indicating the presence of both functional bradykinin B1 and B2 receptors. Eosinophils exhibited higher response to des-Arg9-bradykinin (1 microM; 485% increase in [Ca2+]i) compared to bradykinin (1 microM; 163% increase in [Ca2+]i). This des-Arg9-bradykinin-induced [Ca2+]i increase was markedly inhibited by the selective bradykinin B1 receptor antagonist, Ac-Lys-[D-betaNal7, Ile8]des-Arg9-bradykinin (R-715; 10 microM). Des-Arg9-bradykinin neither modified the basal [Ca2+]i in lymphocytes nor in mononuclear cells from ovalbumin-sensitized and challenged mice, while bradykinin produced a [Ca2+]i increase in both cell types. Our results further support the implication of the inducible bradykinin B1 receptors in airway inflammatory response in ovalbumin-sensitized and challenged mice.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Bradykinin / analogs & derivatives*
  • Bradykinin / pharmacology*
  • Bronchoalveolar Lavage Fluid* / immunology
  • Calcium / metabolism*
  • Eosinophils / drug effects*
  • Eosinophils / immunology
  • Eosinophils / metabolism
  • Intracellular Fluid / drug effects*
  • Intracellular Fluid / immunology
  • Intracellular Fluid / metabolism
  • Male
  • Mice
  • Mice, Inbred BALB C
  • Ovalbumin / pharmacology


  • bradykinin, des-Arg(9)-
  • Ovalbumin
  • Bradykinin
  • Calcium