Functional tumor necrosis factor-related apoptosis-inducing ligand production by avian influenza virus-infected macrophages

Jianfang Zhou, Ka Wai Helen Law, Chung Yan Cheung, Iris H.Y. Ng, J. S.Malik Peiris, Yu Lung Lau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

67 Citations (Scopus)


Severe human disease associated with influenza A H5N1 virus was first detected in Hong Kong in 1997. Its recent reemergence in Asia and high associated mortality highlight the need to understand its pathogenesis. We investigated the roles of death receptor ligands (DRLs) in H5N1 infection. Significant up-regulation of tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) and TNF-α, but not Fas ligand (FasL) mRNA, was detected in human monocyte-derived macrophages (MDMs) infected with avian influenza viruses A/Hong Kong/483/97 (H5N1/97) or its precursor, A/Quail/Hong Kong/G1/97. H5N1/97-infected MDMs exhibited the strongest induction of apoptosis in Jurkat T cells, and it could be reduced by TRAIL-receptor 2 blocking antibody. Furthermore, influenza virus infection enhanced the sensitivity of Jurkat T cells to apoptosis induced by TNF-α, TRAIL, and FasL. Our data suggested that functional TRAIL produced by influenza virus-infected MDMs was related to their cytotoxicity and that the enhanced sensitization to DRL-induced apoptosis detected in avian influenza may contribute to disease pathogenesis.
Original languageEnglish
Pages (from-to)945-953
Number of pages9
JournalJournal of Infectious Diseases
Issue number7
Publication statusPublished - 1 Apr 2006
Externally publishedYes

ASJC Scopus subject areas

  • Immunology and Allergy
  • Infectious Diseases

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