Attenuated production of intracellular IL-10 and IL-12 in monocytes from patients with severe asthma

Katsuyuki Tomita, Sam Lim, Toyoyuki Hanazawa, Omar Usmani, Rob Stirling, K. Fan Chung, Peter J. Barnes, Ian M. Adcock

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22 Citations (Scopus)


Interleukin (IL)-10 and IL-12 production is decreased in peripheral blood mononuclear cells of patients with mild asthma. Using whole blood culture and flow cytometry we examined whether monocyte heterogeneity influenced IL-10 and IL-12 production in subjects with severe asthma. We demonstrated that IL-10 release in LPS-stimulated whole blood culture was decreased in patients with severe persistent asthma compared to those with mild asthma and controis (P = 0.04 and P < 0.001, respectively). In asthmatic patients, the percentage of CD14+CD16+ cells was higher than that from normal subjects (P = 0.04). Severe asthmatics showed significantly less positive staining for IL-10 and IL-12 (P < 0.001 and P = 0.02, respectively) after stimulation in monocytes, compared to mild asthmatics and controls in both CD14+CD16+ and CD14+CD16-cells. These results suggest that IL-10 synthesis is attenuated in severe persistent asthma compared to mild asthma and that this cannot be explained by the increase in the CD14+CD16+ monocytes in asthma.

Original languageEnglish
Pages (from-to)258-266
Number of pages9
JournalClinical Immunology
Issue number3
Publication statusPublished - 1 Jan 2002
Externally publishedYes


  • Bronchial asthma
  • IL-10
  • IL-12
  • Monocyte subpopulation
  • Severity

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