[HTML][HTML] Human γδ T cell receptor repertoires in peripheral blood remain stable despite clearance of persistent hepatitis C virus infection by direct-acting antiviral drug …

S Ravens, J Hengst, V Schlapphoff… - Frontiers in …, 2018 - frontiersin.org
S Ravens, J Hengst, V Schlapphoff, K Deterding, A Dhingra, C Schultze-Florey, C Koenecke
Frontiers in Immunology, 2018frontiersin.org
Human γδ T cells can contribute to clearance of hepatitis C virus (HCV) infection but also
mediate liver inflammation. This study aimed to understand the clonal distribution of γδ T
cells in peripheral blood of chronic HCV patients and following HCV clearance by interferon-
free direct-acting antiviral drug therapies. To this end, γδ T cell receptor (TCR) repertoires
were monitored by mRNA-based next-generation sequencing. While the percentage of Vγ9+
T cells was higher in patients with elevated liver enzymes and a few expanded Vδ3 clones …
Human γδ T cells can contribute to clearance of hepatitis C virus (HCV) infection but also mediate liver inflammation. This study aimed to understand the clonal distribution of γδ T cells in peripheral blood of chronic HCV patients and following HCV clearance by interferon-free direct-acting antiviral drug therapies. To this end, γδ T cell receptor (TCR) repertoires were monitored by mRNA-based next-generation sequencing. While the percentage of Vγ9+ T cells was higher in patients with elevated liver enzymes and a few expanded Vδ3 clones could be identified in peripheral blood of 23 HCV-infected non-cirrhotic patients, overall clonality and complexity of γδ TCR repertoires were largely comparable to those of matched healthy donors. Monitoring eight chronic HCV patients before, during and up to 1 year after therapy revealed that direct-acting antiviral (DAA) drug therapies induced only minor alterations of TRG and TRD repertoires of Vγ9+ and Vγ9 cells. Together, we show that peripheral γδ TCR repertoires display a high stability (1) by chronic HCV infection in the absence of liver cirrhosis and (2) by HCV clearance in the course of DAA drug therapy.
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