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The role of bactericidal/permeability-increasing protein in men with chronic obstructive pulmonary disease.

COPD. 2012 Apr;9(2):197-202. doi:10.3109/15412555.2011.654143. Epub 2012 Mar 12
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摘要


BACKGROUND AND OBJECTIVE:Bactericidal/permeability-increasing protein (BPI) is a member of the pattern recognition receptors of the innate immune system. Recently, an association between genetic polymorphism in the BPI gene and a risk of airflow decline after transplantation was demonstrated, but whether these findings are reproducible in nontransplantation populations, such as those with COPD, is still unknown. The aim of this study is to explore the role of BPI in COPD. METHODS:The genotypes of 107 patients with COPD and 110 control subjects were evaluated by polymerase chain reaction and polymorphism analysis of the BPI genes and ELISA analysis of the plasma BPI level. All subjects were men over 40 years old who smoked. RESULTS:BPI mutation PstI (T→C) polymorphism in intron 5 was associated with an increased risk of developing COPD (OR 3.73, 95%CI: 1.62-9.10), and the frequency was significantly increased in the COPD group compared with the control group (26/107 [24.3%] vs 12/110 [10.9%], p = 0.002). In addition, COPD patients exhibited a decreased plasma level of BPI compared with the control group (10.6 ± 2.2 vs 23.4 ± 2.1 ng/ml, p < 0.0001). CONCLUSIONS:BPI mutation (PstI in intron 5) and a decreased plasma BPI level were significant risk factors in susceptibility to COPD. These results demonstrate that BPI genetic mutation and impaired BPI production or release may result in airflow obstruction in smokers.

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