Short Communication
Monocyte derived macrophages from CF pigs exhibit increased inflammatory responses at birth

https://doi.org/10.1016/j.jcf.2017.03.007Get rights and content
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Abstract

Background

We sought to address whether CF macrophages have a primary functional defect as a consequence of CFTR loss and thus contribute to the onset of infection and inflammation observed in CF lung disease.

Methods

Monocyte derived macrophages (MDMs) were prepared from newborn CF and non-CF pigs. CFTR mRNA expression was quantified by rtPCR and anion channel function was determined using whole cell patch clamp analysis. IL8 and TNFα release from MDMs in response to lipopolysaccharide stimulation was measured by ELISA.

Results

CFTR was expressed in MDMs by Q-rtPCR at a lower level than in epithelial cells. MDMs exhibited functional CFTR current at the cell membrane and this current was absent in CF MDMs. CF MDMs demonstrated an exaggerated response to lipopolysaccharide stimulation.

Conclusions

In the absence of CFTR function, macrophages from newborn CF pigs exhibit an increased inflammatory response to a lipopolysaccharide challenge. This may contribute to the onset and progression of CF lung disease.

Keywords

Inflammation
Monocyte
Macrophage
Lipopolysaccharide
CFTR

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1

RDG and PBM contributed equally to this manuscript.