期刊
ALLERGY
卷 72, 期 10, 页码 1583-1586出版社
WILEY
DOI: 10.1111/all.13185
关键词
asthma; basophil; biomarker; eosinophil; flow cytometry
资金
- Health Research Council of New Zealand
- Asthma and Respiratory Foundation of New Zealand
- University of Newcastle, NSW, Australia
Sputum basophil numbers are increased in allergic asthmatics, but it is unclear what role airway basophils play in TH2-low asthma phenotypes. Using flow cytometry, we found that basophils were significantly increased in all asthmatics (n=26) compared with healthy controls (n=8) (P=0.007) with highest levels observed in eosinophilic asthma (EA); median 0.22%, IQR 0.11%-0.47%; n=14) compared with non-EA (NEA) (0.06%, 0.00%-0.20%; n=12; P<0.05). In asthmatics, basophils were positively correlated with sputum eosinophils (r=0.54; P<0.005) and inversely with sputum neutrophils (r=-0.46: P<0.05), but not with FEV1 (% predicted), FEV1/FVC or bronchodilator reversibility. In a subgroup initially identified as inadequately controlled asthma (n=7), there was a trend (P=0.08) towards a reduction in sputum basophils following increased inhaled corticosteroid (ICS) treatment. Our findings suggest that basophils may be particularly important in eosinophilic asthma and that sputum basophil assessment could be a useful additional indicator of TH2-high asthma.
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