期刊
PLOS ONE
卷 5, 期 12, 页码 -出版社
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0015631
关键词
-
资金
- Guangdong province Natural Science Foundation [1015100600200001]
- Guangdong province Science and Technology Program [2007A032100004]
Secondary dengue infections are frequently associated with increased risk for dengue hemorrhagic fever and dengue shock syndrome. Surprisingly, we observed no dengue hemorrhagic fever cases among 353 hospitalized dengue-infected patients including 212 with primary, and 141 with secondary dengue 1 infection in China. To explore virological and immunological mechanisms which may account for this unexpected clinical observation, we assessed dengue viremia, type I interferon and inflammatory cytokine levels in these patients. While the levels of viremia and inflammatory cytokines are indistinguishable between primary and secondary infections, IFN alpha levels are significantly higher in primary than that in secondary infection. However, IFN alpha levels are positively correlated with dengue viremia levels (p<0.0001), but negatively correlated with the platelet counts (p<0.0001) and serum ALT levels (p = 0.0003). These results provide direct in vivo evidence that clinical dengue disease severity is affected by both viral and human immune factors.
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