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Blood, 15 August 2005, Vol. 106, No. 4, pp. 1175-1182.
Prepublished online as a Blood First Edition Paper on April 28, 2005; DOI 10.1182/blood-2005-01-0126.
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Submitted January 11, 2005
Accepted April 15, 2005
Plasma chemokine levels correlate with the outcome of antiviral therapy in hepatitis C patients
David Butera, Svetlana Marukian, Amy E Iwamaye, Edgardo Hembrador, Thomas J Chambers, Adrian M Di Bisceglie, Edgar D Charles, Andrew H Talal, Ira M Jacobson, Charles M Rice, and Lynn B Dustin*
Center for the Study of Hepatitis C, Rockefeller University, New York, NY, USA
Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, MO, USA
Department of Medicine, Division of Gastroenterology and Hepatology, Saint Louis University School of Medicine, St. Louis, MO, USA
Center for the Study of Hepatitis C, Department of Medicine, Division of Gastroenterology and Hepatology, Weill Medical College of Cornell University, New York, NY, USA
* Corresponding author; email: dustinl{at}rockefeller.edu.
Chronic infection with the hepatitis C virus (HCV) is associated with failures of T cell-mediated immune clearance and with abnormal B cell growth and activation. We examined the levels of chemokines that bind to CXCR3 to determine whether such chemokines might play a role in the failure of the immune system to clear HCV infection. Elevations in CXCL9, CXCL10, and CXCL11 were observed in all HCV patients. CXCR3 expression was increased significantly on peripheral blood B lymphocytes, but not T lymphocytes, from individuals with HCV infection. Chemokine levels were measured in samples collected before, during and after antiviral therapy from a group of 29 patients infected with HCV genotypes 1a (24 patients) and 1b (5 patients). Levels of CXCL10 and CXCL9 decreased following successful antiviral therapy; CXCL11 did not decline significantly during or in the first 6 months after therapy. The baseline level of CXCL10 (measured before the start of antiviral treatment) was greatest in HCV patients who subsequently became nonresponders to therapy. These results suggest that plasma concentrations of immunoreactive CXCL10 may be a predictor of responsiveness or nonresponsiveness to antiviral therapy with pegylated IFN ± ribavirin. This observation has implications for understanding the pathogenesis of HCV infection.

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