Plasmacytoid dendritic cells in acute and chronic hepatitis C virus infection
| Autor: | Teresa Santantonio, Gerd R. Pape, Reinhart Zachoval, M. Wächtler, Malte H.J. Heeg, Markus Backmund, Carl Albrecht Schirren, J. Tilman Gerlach, Norbert H. Gruener, W. Schraut, Maria-Christina Jung, Helmut M. Diepolder, Axel Ulsenheimer |
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| Rok vydání: | 2005 |
| Předmět: |
Adult
Male medicine.medical_specialty Receptors CCR7 medicine.medical_treatment Inflammation Peripheral blood mononuclear cell Virus Blood cell Interferon Internal medicine medicine Humans Aged Hepatology business.industry Interferon-alpha hemic and immune systems Dendritic cell Dendritic Cells HLA-DR Antigens Hepatitis C Chronic Middle Aged Hepatitis C Cytokine medicine.anatomical_structure Immunology Acute Disease Female Receptors Chemokine medicine.symptom business medicine.drug |
| Zdroj: | Hepatology (Baltimore, Md.). 41(3) |
| ISSN: | 0270-9139 |
| Popis: | Chronic evolution of acute hepatitis C (aHC) occurs in more than 80% of patients but can frequently be prevented by early treatment with interferon (IFN)-α. Plasmacytoid dendritic cells (pDCs) are the major endogenous IFN-α producers, but their role in aHC is unknown. In this study, frequency, phenotype, and pDC function were analyzed in 13 patients with aHC and 32 patients with chronic hepatitis C (cHC) compared with 20 healthy controls, 33 sustained responders to antiviral treatment, 14 patients with acute hepatitis B (aHB), and 21 patients with nonviral inflammatory disease. In aHC, pDCs in the peripheral blood were significantly reduced compared with healthy controls (median, 0.1% vs. 0.36%, P < .0005) and were inversely correlated to alanine aminotransferase levels (r = −0.823; P < .005). Circulating pDCs in aHC were immature, as determined via reduced expression of HLA-DR and CCR7, and produced little amounts of IFN-α (median, 3.5 pg/50,000 peripheral blood mononuclear cells [PBMCs] vs. 498.4 pg/50,000 PBMCs in healthy controls; P < .0005). Less pronounced changes were present in cHC (median, 0.17%, 28.0 pg/50,000 PBMCs IFN-α, respectively). However, a significantly reduced frequency and IFN-α production was also found in self-limited aHB (median 0.1%, 8.6 pg/50,000 PBMCs) and in patients with nonviral inflammatory disease (median 0.19%, 7.5 pg/50,000 PBMCs). In conclusion, in aHC frequency and IFN-α–producing capacity of peripheral blood pDCs are dramatically reduced and inversely correlated with the degree of liver inflammation. In cHC there is incomplete recovery of pDC function, which, however, could be solely due to the chronic inflammatory state. (HEPATOLOGY 2005;41:643–651.) |
| Databáze: | OpenAIRE |
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