Pretreatment with rh-GMCSF, but not rh-IL3, enhances PAF-induced eosinophil accumulation in guinea-pig airways.
Intraperitoneal injections of recombinant human granulocyte-macrophage colony stimulating factor (rh-GMCSF, 50 micrograms/kg-1 daily) or interleukin-3 (rh-IL3, 50 micrograms kg-1 daily) for two days, induced an increase in the percentage of bone marrow and pulmonary airway eosinophils in the guinea-pig. In addition, rh-IL3-treated animals exhibited an increase (21%) in blood neutrophils. Exposure of guinea-pigs to an aerosol of platelet activating factor (PAF) gives rise to a selective pulmonary eosinophil accumulation, maximal at 48 h. The eosinophilic response to PAF was significantly enhanced in rh-GMCSF-treated guinea-pigs but was suppressed in rh-IL3-treated animals.
Sanjar
S
S
Preclincal Research, Sandoz Ltd., Basel, Switzerland.
Smith
D
D
Kings
M A
MA
Morley
J
J
D000336:Aerosols; D000818:Animals; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology; D003115:Colony-Stimulating Factors / Q000494:pharmacology*; D004804:Eosinophils / Q000187:drug effects*; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D006133:Growth Substances / Q000494:pharmacology*; D006168:Guinea Pigs; D066298:In Vitro Techniques; D007377:Interleukin-3 / Q000494:pharmacology*; D010972:Platelet Activating Factor / Q000008:administration & dosage / Q000494:pharmacology*; D011994:Recombinant Proteins / Q000494:pharmacology
D000336:Aerosols; D003115:Colony-Stimulating Factors; D006133:Growth Substances; D007377:Interleukin-3; D010972:Platelet Activating Factor; D011994:Recombinant Proteins; D016178:Granulocyte-Macrophage Colony-Stimulating Factor