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Endotoxin receptor CD14 in PiZ alpha-1-antitrypsin deficiency individuals.

Abstract：

BACKGROUND:CD14, a receptor for lipopolysaccharides (LPS), is found in both a membrane-bound form (mCD14) and a soluble form (sCD14). It is suggested that sCD14 is mainly released from blood monocytes by serine protease-mediated shedding. Because alpha1-antitrypsin (AAT), an inhibitor of serine proteases, has been shown to regulate CD14 expression in human monocytes in vitro, we sought to investigate plasma levels of sCD14 and monocyte expression of mCD14 in subjects at age 30 years with normal MM and deficient PiZZ and PiSZ genotypes of AAT. METHODS:Plasma levels of AAT and sCD14 were measured in 75 PiZZ and 34 PiSZ individuals with normal lung function identified from the Swedish neonatal AAT deficiency screening, and in 95 age matched PiMM controls. The mCD14 expression in monocytes from 9 PiZZ, 6 PiSZ and 11 PiMM subjects was analysed by FACS and Quantitative Real Time Reverse Transcription PCA. RESULTS:As expected, plasma AAT concentrations were PiMM>PiSZ>PiZZ (p < 0.001). Plasma sCD14 levels were higher in PiZZ than in PiMM subjects (p < 0.01). The expression level of mCD14 was higher (1.89-fold) in monocytes isolated from PiZZ subjects compared to PiMM controls (p = 0.00189). CONCLUSION:This study is the first to show higher levels of plasma sCD14 and monocyte mCD14 expression in young, clinically healthy PiZZ AAT subjects.

journal_name

Respir Res

journal_title

Respiratory research

authors

Sandström CS,Novoradovskaya N,Cilio CM,Piitulainen E,Sveger T,Janciauskiene S

doi

10.1186/1465-9921-9-34

subject

Has Abstract

pub_date

2008-04-21 00:00:00

pages

34

eissn

1465-9921

issn

1465-993X

pii

1465-9921-9-34

journal_volume

9

pub_type

杂志文章

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