Laser-assisted microdissection and real-time PCR detect anti-inflammatory effect of perfluorocarbon.
The aim of this study was to identify cell types involved in the anti-inflammatory effect of ventilation with perfluorocarbon in vivo. Fifteen anesthetized, surfactant-depleted piglets received either aerosolized perfluorocarbon (Aerosol-PFC), partial liquid ventilation (rLV) at functional residual capacity (FRC) volume (FRC-PLV), or intermittent mandatory ventilation (control). After laser-assisted microdissection of different lung cell types, mRNA expression of IL-8 and ICAM-1 was determined using TaqMan real-time PCR normalized to hypoxanthine phosphoribosyltransferase (HPRT). IL-8 mRNA expression (means +/- SE; control vs. Aerosol-PFC) was 356 +/- 142 copies IL-8 mRNA/copy HPRT mRNA vs. 3.5 +/- 1.8 in alveolar macrophages (P <0.01); 208 +/- 108 vs. 2.7 +/- 0.8 in bronchiolar epithelial cells (P <0.05); 26 +/- 11 vs. 0.7 +/- 0.2 in alveolar septum cells (P <0.01); 2.8 +/- 1.0 vs. 0.8 +/- 0.4 in bronchiolar smooth muscle cells (P <0.05); and 1.1 +/- 0.4 vs. 0.2 +/- 0.05 in vascular smooth muscle cells (P <0.05). With FRC-PLV, IL-8/HPRT mRNA expression was significantly lower in macrophages, bronchiolar epithelial, and vascular smooth muscle cells. ICAM-1 mRNA expression in vascular endothelial cells remained unchanged. Predominantly, alveolar macrophages and bronchiolar epithelial cells were involved in the inflammatory pulmonary process. The anti-inflammatory effect of Aerosol-PFC was most pronounced.
von der Hardt
Katharina
K
Klinik für Kinder und Jugendliche, Loschgestr. 15, D-91054 Erlangen, Germany.
Kandler
Michael Andreas
MA
Fink
Ludger
L
Schoof
Ellen
E
Dotsch
Jorg
J
Bohle
Rainer Maria
RM
Rascher
Wolfgang
W
D000818:Animals; D004210:Dissection / Q000379:methods*; D005466:Fluorocarbons / Q000494:pharmacology*; D007041:Hypoxanthine Phosphoribosyltransferase / Q000235:genetics; D007150:Immunohistochemistry; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics; D016209:Interleukin-8 / Q000235:genetics* / Q000276:immunology; D007834:Lasers; D016676:Macrophages, Alveolar / Q000187:drug effects / Q000276:immunology; D008904:Miniaturization; D009131:Muscle, Smooth, Vascular / Q000166:cytology / Q000187:drug effects / Q000276:immunology; D010100:Oxygen / Q000378:metabolism; D011014:Pneumonia / Q000188:drug therapy* / Q000276:immunology; D016133:Polymerase Chain Reaction / Q000379:methods; D011650:Pulmonary Alveoli / Q000166:cytology / Q000187:drug effects* / Q000276:immunology; D011663:Pulmonary Surfactants / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis; D020545:Respiratory Mucosa / Q000166:cytology / Q000187:drug effects / Q000276:immunology; D013552:Swine
D005466:Fluorocarbons; D016209:Interleukin-8; D011663:Pulmonary Surfactants; D012333:RNA, Messenger; D018799:Intercellular Adhesion Molecule-1; D007041:Hypoxanthine Phosphoribosyltransferase; D010100:Oxygen