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Induction of oxidative burst response in human neutrophils by immune complexes made in vitro of lipopolysaccharide and hyperimmune serum from chronically infected patients
Author(s) -
KRONBORG GITTE,
FOMSGAARD ANDERS,
JENSEN ELSEBETH T.,
KHARAZMI ARSALAN,
HØIBY NIELS
Publication year - 1993
Publication title -
apmis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 88
eISSN - 1600-0463
pISSN - 0903-4641
DOI - 10.1111/j.1699-0463.1993.tb00197.x
Subject(s) - lipopolysaccharide , respiratory burst , pseudomonas aeruginosa , immune system , in vitro , cystic fibrosis , chemistry , microbiology and biotechnology , antigen , immunology , in vivo , stimulation , biology , medicine , bacteria , biochemistry , endocrinology , genetics
Purified lipopolysaccharide (LPS) from Pseudomonas aeruginosa was used as an antigen for immune complex (IC) formation in vitro together with hyperimmune sera from chronically P. aeruginosa ‐infected patients with cystic fibrosis (CF). P. aeruginosa LPS by itself did not induce an oxidative burst in human neutrophil granulocytes (PMN)s measured by chemiluminescence (CL). This was also the case using hyperimmune CF serum alone. In contrast, P. aeruginosa LPS together with CF serum did induce a CL response. The CL responses varied depending on the sera used for IC formation, and were reduced when protein A preabsorbed sera were used. PEG precipitation of the ICs from the mixture increased the CL response. These findings indicate that the CL responses induced by the mixture of P. aeruginosa LPS and CF serum were due to IC formation and an Fc‐mediated stimulation of the PMNs. It is concluded that ICs made from sera of chronically infected CF patients and purified P. aeruginosa LPS are biologically active in terms of activating PMNs, and may contribute to the lung tissue damage seen in this group of patients.