Allergen-induced biphasic plasma exudation responses in guinea pig large airways

Am Rev Respir Dis. 1993 Sep;148(3):695-701. doi: 10.1164/ajrccm/148.3.695.


In this study involving sensitized guinea pigs (anesthetized intramuscularly with a 3:2 mixture of ketamine+xylazine, 1 ml/kg), we applied allergen (ovalbumin) selectively to the tracheobronchial mucosa (sparing the nasal passages and the terminal airways) and examined the occurrence of immediate and late-phase inflammatory exudation of plasma and plasma-derived mediators (bradykinins) into the airway lumen. The experiments were terminated 10 to 480 min after challenge. A selective lavage that sampled the surface liquids of the extrapulmonary bronchi and the lower trachea was performed. The amount of plasma (microliter) was determined by analysis of a plasma tracer, [125I]albumin, in lavage fluid and blood (plasma) samples. Ovalbumin, 3 to 12 pmol, and histamine, 5 and 10 nmol, produced a dose-dependent immediate exudation response (p < 0.001). The effects were nonneurogenic because they were not affected by topical lidocaine given in a dose (3 nmol) that prevented the exudative effect of capsaicin. The 6- and 12-pmol doses of ovalbumin (but not 3 pmol) produced a significant late-phase exudative response at 5 h (p < 0.001), and both the immediate and late phases were associated with increased (p < 0.01 to p < 0.001) levels of bradykinin in the lavage fluids. Histamine, even in doses that produced a greater early response than the allergen, did not produce a late-phase response. A single topical dose of an antiasthma steroid (budesonide, 12 mumol/kg) administered just before ovalbumin (6 pmol) had little effect on the immediate response but inhibited the late-phase response (p < 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)

Publication types

  • Comparative Study

MeSH terms

  • Allergens / administration & dosage*
  • Animals
  • Bronchi / diagnostic imaging
  • Bronchi / drug effects*
  • Budesonide
  • Drug Interactions
  • Exudates and Transudates / diagnostic imaging
  • Exudates and Transudates / drug effects*
  • Glucocorticoids / administration & dosage
  • Guinea Pigs
  • Histamine / administration & dosage
  • Immunization
  • Lidocaine / administration & dosage
  • Male
  • Ovalbumin / administration & dosage
  • Plasma / diagnostic imaging
  • Plasma / drug effects*
  • Pregnenediones / administration & dosage
  • Radionuclide Imaging
  • Serum Albumin, Radio-Iodinated
  • Therapeutic Irrigation
  • Time Factors
  • Trachea / diagnostic imaging
  • Trachea / drug effects*


  • Allergens
  • Glucocorticoids
  • Pregnenediones
  • Serum Albumin, Radio-Iodinated
  • Budesonide
  • Histamine
  • Ovalbumin
  • Lidocaine