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Neutrophil emigration in the skin, lungs, and peritoneum: different requirements for CD11/CD18 revealed by CD18-deficient mice.

Mizgerd JP, Kubo H, Kutkoski GJ, Bhagwan SD, Scharffetter-Kochanek K, Beaudet AL, Doerschuk CM - J. Exp. Med. (1997)

Bottom Line: These data are consistent with expectations based on studies using blocking antibodies to inhibit CD11/CD18 complexes, and on observations of humans lacking CD11/CD18 complexes.The number of emigrated neutrophils in lung sections during Escherichia coli pneumonia, or in peritoneal lavage fluid after 4 h of S. pneumoniae peritonitis, was not reduced in CD18-/- mutants, but rather was greater than the WT values (240 +/- 30 and 220 +/- 30% WT, respectively).These data contrast with expectations.

View Article: PubMed Central - PubMed

Affiliation: Physiology Program, Harvard School of Public Health, Boston, Massachusetts 02115, USA.

ABSTRACT
To determine the role of CD11/CD18 complexes in neutrophil emigration, inflammation was induced in the skin, lungs, or peritoneum of mutant mice deficient in CD18 (CD18-/- mutants). Peripheral blood of CD18-/- mutants contained 11-fold more neutrophils than did blood of wild-type (WT) mice. During irritant dermatitis induced by topical application of croton oil, the number of emigrated neutrophils in histological sections of dermis was 98% less in CD18-/- mutants than in WT mice. During Streptococcus pneumoniae pneumonia, neutrophil emigration in CD18-/- mutants was not reduced. These data are consistent with expectations based on studies using blocking antibodies to inhibit CD11/CD18 complexes, and on observations of humans lacking CD11/CD18 complexes. The number of emigrated neutrophils in lung sections during Escherichia coli pneumonia, or in peritoneal lavage fluid after 4 h of S. pneumoniae peritonitis, was not reduced in CD18-/- mutants, but rather was greater than the WT values (240 +/- 30 and 220 +/- 30% WT, respectively). Also, there was no inhibition of neutrophil emigration during sterile peritonitis induced by intraperitoneal injection of thioglycollate (90 +/- 20% WT). These data contrast with expectations. Whereas CD11/CD18 complexes are essential to the dermal emigration of neutrophils during acute dermatitis, CD18-/- mutant mice demonstrate surprising alternative pathways for neutrophil emigration during pneumonia or peritonitis.

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Neutrophils in the alveolar septae of uninfected WT or  CD18−/− mice and 6 h after intratracheal instillation of E. coli or S. pneumoniae. Septal neutrophils were quantitated morphometrically and expressed  as the mean ± SEM volume percent of septal tissue occupied by neutrophils for WT (closed bars) or CD18−/− (open bars) mice. *Significant differences from WT; ‡significant differences from uninfected mice (P <0.05).
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Figure 3: Neutrophils in the alveolar septae of uninfected WT or CD18−/− mice and 6 h after intratracheal instillation of E. coli or S. pneumoniae. Septal neutrophils were quantitated morphometrically and expressed as the mean ± SEM volume percent of septal tissue occupied by neutrophils for WT (closed bars) or CD18−/− (open bars) mice. *Significant differences from WT; ‡significant differences from uninfected mice (P <0.05).

Mentions: More neutrophils were present in the alveolar septae of uninfected CD18−/− mutants than in those of uninfected WT mice (Fig. 3). There were almost no neutrophils in the alveolar air spaces of WT and CD18−/− mutant mice (Fig. 4).


Neutrophil emigration in the skin, lungs, and peritoneum: different requirements for CD11/CD18 revealed by CD18-deficient mice.

Mizgerd JP, Kubo H, Kutkoski GJ, Bhagwan SD, Scharffetter-Kochanek K, Beaudet AL, Doerschuk CM - J. Exp. Med. (1997)

Neutrophils in the alveolar septae of uninfected WT or  CD18−/− mice and 6 h after intratracheal instillation of E. coli or S. pneumoniae. Septal neutrophils were quantitated morphometrically and expressed  as the mean ± SEM volume percent of septal tissue occupied by neutrophils for WT (closed bars) or CD18−/− (open bars) mice. *Significant differences from WT; ‡significant differences from uninfected mice (P <0.05).
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Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2199087&req=5

Figure 3: Neutrophils in the alveolar septae of uninfected WT or CD18−/− mice and 6 h after intratracheal instillation of E. coli or S. pneumoniae. Septal neutrophils were quantitated morphometrically and expressed as the mean ± SEM volume percent of septal tissue occupied by neutrophils for WT (closed bars) or CD18−/− (open bars) mice. *Significant differences from WT; ‡significant differences from uninfected mice (P <0.05).
Mentions: More neutrophils were present in the alveolar septae of uninfected CD18−/− mutants than in those of uninfected WT mice (Fig. 3). There were almost no neutrophils in the alveolar air spaces of WT and CD18−/− mutant mice (Fig. 4).

Bottom Line: These data are consistent with expectations based on studies using blocking antibodies to inhibit CD11/CD18 complexes, and on observations of humans lacking CD11/CD18 complexes.The number of emigrated neutrophils in lung sections during Escherichia coli pneumonia, or in peritoneal lavage fluid after 4 h of S. pneumoniae peritonitis, was not reduced in CD18-/- mutants, but rather was greater than the WT values (240 +/- 30 and 220 +/- 30% WT, respectively).These data contrast with expectations.

View Article: PubMed Central - PubMed

Affiliation: Physiology Program, Harvard School of Public Health, Boston, Massachusetts 02115, USA.

ABSTRACT
To determine the role of CD11/CD18 complexes in neutrophil emigration, inflammation was induced in the skin, lungs, or peritoneum of mutant mice deficient in CD18 (CD18-/- mutants). Peripheral blood of CD18-/- mutants contained 11-fold more neutrophils than did blood of wild-type (WT) mice. During irritant dermatitis induced by topical application of croton oil, the number of emigrated neutrophils in histological sections of dermis was 98% less in CD18-/- mutants than in WT mice. During Streptococcus pneumoniae pneumonia, neutrophil emigration in CD18-/- mutants was not reduced. These data are consistent with expectations based on studies using blocking antibodies to inhibit CD11/CD18 complexes, and on observations of humans lacking CD11/CD18 complexes. The number of emigrated neutrophils in lung sections during Escherichia coli pneumonia, or in peritoneal lavage fluid after 4 h of S. pneumoniae peritonitis, was not reduced in CD18-/- mutants, but rather was greater than the WT values (240 +/- 30 and 220 +/- 30% WT, respectively). Also, there was no inhibition of neutrophil emigration during sterile peritonitis induced by intraperitoneal injection of thioglycollate (90 +/- 20% WT). These data contrast with expectations. Whereas CD11/CD18 complexes are essential to the dermal emigration of neutrophils during acute dermatitis, CD18-/- mutant mice demonstrate surprising alternative pathways for neutrophil emigration during pneumonia or peritonitis.

Show MeSH
Related in: MedlinePlus