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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Respir+Res
2005 ; 6
(1
): 135
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gab.com Text
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Proinflammatory cytokine responses induced by influenza A (H5N1) viruses in
primary human alveolar and bronchial epithelial cells
#MMPMID16283933
Chan MC
; Cheung CY
; Chui WH
; Tsao SW
; Nicholls JM
; Chan YO
; Chan RW
; Long HT
; Poon LL
; Guan Y
; Peiris JS
Respir Res
2005[Nov]; 6
(1
): 135
PMID16283933
show ga
BACKGROUND: Fatal human respiratory disease associated with influenza A subtype
H5N1 has been documented in Hong Kong, and more recently in Vietnam, Thailand and
Cambodia. We previously demonstrated that patients with H5N1 disease had
unusually high serum levels of IP-10 (interferon-gamma-inducible protein-10).
Furthermore, when compared with human influenza virus subtype H1N1, the H5N1
viruses in 1997 (A/Hong Kong/483/97) (H5N1/97) were more potent inducers of
pro-inflammatory cytokines (e.g. tumor necrosis factor-a) and chemokines (e.g.
IP-10) from primary human macrophages in vitro, which suggests that cytokines
dysregulation may play a role in pathogenesis of H5N1 disease. Since respiratory
epithelial cells are the primary target cell for replication of influenza
viruses, it is pertinent to investigate the cytokine induction profile of H5N1
viruses in these cells. METHODS: We used quantitative RT-PCR and ELISA to compare
the profile of cytokine and chemokine gene expression induced by H5N1 viruses
A/HK/483/97 (H5N1/97), A/Vietnam/1194/04 and A/Vietnam/3046/04 (both H5N1/04)
with that of human H1N1 virus in human primary alveolar and bronchial epithelial
cells in vitro. RESULTS: We demonstrated that in comparison to human H1N1
viruses, H5N1/97 and H5N1/04 viruses were more potent inducers of IP-10,
interferon beta, RANTES (regulated on activation, normal T cell expressed and
secreted) and interleukin 6 (IL-6) in primary human alveolar and bronchial
epithelial cells in vitro. Recent H5N1 viruses from Vietnam (H5N1/04) appeared to
be even more potent at inducing IP-10 than H5N1/97 virus. CONCLUSION: The H5N1/97
and H5N1/04 subtype influenza A viruses are more potent inducers of
proinflammatory cytokines and chemokines in primary human respiratory epithelial
cells than subtype H1N1 virus. We suggest that this hyper-induction of cytokines
may be relevant to the pathogenesis of human H5N1 disease.
|Bronchi/*immunology/*pathology
[MESH]
|Cells, Cultured
[MESH]
|Cytokines/*immunology
[MESH]
|Epithelial Cells/immunology/pathology
[MESH]
|Humans
[MESH]
|Immunologic Factors
[MESH]
|Influenza A Virus, H1N1 Subtype/immunology
[MESH]
|Influenza A Virus, H5N1 Subtype/*immunology
[MESH]