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Presence of Rheumatoid Factor during Chronic HCV Infection Is Associated with Expansion of Mature Activated Memory B-Cells that Are Hypo-Responsive to B-Cell Receptor Stimulation and Persist during the Early Stage of IFN Free Therapy.
- Source :
-
PloS one [PLoS One] 2015 Dec 09; Vol. 10 (12), pp. e0144629. Date of Electronic Publication: 2015 Dec 09 (Print Publication: 2015). - Publication Year :
- 2015
-
Abstract
- Approximately half of those with chronic hepatitis C virus (HCV) infection have circulating rheumatoid factor (RF), and a portion of these individuals develop cryoglobulinemic vasculitis. B cell phenotype/function in relation to RF in serum has been unclear. We examined B cell subset distribution, activation state (CD86), cell cycle state (Ki67), and ex-vivo response to BCR, TLR9 and TLR7/8 stimulation, in chronic HCV-infected donors with or without RF, and uninfected donors. Mature-activated B-cells of HCV-infected donors had lower CD86 expression compared to uninfected donors, and in the presence of RF they also showed reduced CD86 expression in response to BCR and TLR9 stimulation. Additionally, mature activated memory B cells of HCV RF+ donors less commonly expressed Ki67+ than HCV RF- donors, and did not proliferate as well in response to BCR stimulation. Proportions of mature-activated B cells were enhanced, while naïve B-cells were lower in the peripheral blood of HCV-RF+ compared to RF- and uninfected donors. None of these parameters normalize by week 8 of IFN free direct acting antiviral (DAA) therapy in HCV RF+ donors, while in RF- donors, mature activated B cell proportions did normalize. These data indicate that while chronic HCV infection alone results in a lower state of activation in mature activated memory B cells, the presence of RF in serum is associated with a more pronounced state of unresponsiveness and an overrepresentation of these B cells in the blood. This phenotype persists at least during the early time window after removal of HCV from the host.
- Subjects :
- Adult
Aged
Aged, 80 and over
Antiviral Agents therapeutic use
Cryoglobulinemia etiology
Female
Hepatitis C, Chronic complications
Hepatitis C, Chronic drug therapy
Humans
Male
Middle Aged
Receptors, Antigen, B-Cell metabolism
Rheumatoid Factor metabolism
B-Lymphocytes immunology
Hepatitis C, Chronic immunology
Subjects
Details
- Language :
- English
- ISSN :
- 1932-6203
- Volume :
- 10
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- PloS one
- Publication Type :
- Academic Journal
- Accession number :
- 26649443
- Full Text :
- https://doi.org/10.1371/journal.pone.0144629