HCV Viremia Drives an Increment of CD86 Expression by Myeloid Dendritic Cells

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art_MALTA_HCV_Viremia_Drives_an_Increment_of_CD86_Expression_2013.PDF (859.21 KB)
Citações na Scopus
6
Tipo de produção
article
Data de publicação
2013
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
WILEY-BLACKWELL
Autores
NASTRI, A. C. S. S.
Citação
JOURNAL OF MEDICAL VIROLOGY, v.85, n.11, p.1919-1924, 2013
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
The host immune response, including innate and adaptive immunity, plays a critical role in determining the outcome of viral infection. Nevertheless, little is known about the exact reasons for the failure of the host immune system in controlling hepatitis C virus (HCV) infection. Impairment of dendritic cells (DCs) function is probably one of the mechanisms responsible for immune evasion of HCV. In this study, the frequency and phenotype of DCs subsets were analyzed in three groups: HCV-infected individuals who developed viral persistence (1), HCV-infected individuals who spontaneously cleared the virus (2) and HCV-seronegative uninfected subjects (3). The results showed that the frequency of DCs subsets was not statistically significant between groups. Plasmacytoid DCs circulating exhibited an immature phenotype characterized by low expression of CD86. On the other hand, CD86 expression in myeloid DCs was significantly higher in chronic infected individuals compared to healthy controls (P=0.037). A positive correlation was observed between CD86(+) myeloid DC (mDC) and HCV viral load (r=0.4121, P=0.0263). These results suggest that HCV did not have an inhibitory effect on mDC maturation and the HCV viremia drives the increase of CD86 expression in mDC. The regulation of DCs maturation and migration lies at the level of intracellular signaling. HCV can activate or block intracellular signaling pathways and alter DC function. In conclusion, the present study suggests that imbalance of DC maturation by the virus represents a mechanism of evasion of the immune system despite the fact that HCV viremia appears to exert a stimulatory effect on cell-surface immune phenotype. J Med. Virol. 85:1919-1924, 2013. (c) 2013 Wiley Periodicals, Inc.
Palavras-chave
innate immunity, dendritic cell, chronic infection, CD86
URI
https://observatorio.fm.usp.br/handle/OPI/5078
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MCM
Artigos e Materiais de Revistas Científicas - FM/MGT
Artigos e Materiais de Revistas Científicas - HC/ICHC
Artigos e Materiais de Revistas Científicas - LIM/07
Artigos e Materiais de Revistas Científicas - LIM/19
Artigos e Materiais de Revistas Científicas - LIM/60
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