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Floating density of hepatitis C virus particles and response to interferon treatment
Author(s) -
Sakai Akito,
Kaneko Shuichi,
Matsushita Eiki,
Kobayashi Kenichi
Publication year - 1998
Publication title -
journal of medical virology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 121
eISSN - 1096-9071
pISSN - 0146-6615
DOI - 10.1002/(sici)1096-9071(199805)55:1<12::aid-jmv3>3.0.co;2-r
Subject(s) - single strand conformation polymorphism , hypervariable region , interferon , titer , hepatitis c virus , virology , flaviviridae , ribavirin , virus , medicine , hepatitis c , gastroenterology , immunology , antibody , biology , gene , polymerase chain reaction , genetics
Hepatitis C virus (HCV) particles can be classified into two major fractions according to their floating density in serum. However, the genomic heterogeneity of each fraction and the relationship between this viral characteristic and interferon (IFN) response in patients with chronic hepatitis are not known. In this study, floating density and single strand conformation polymorphism (SSCP) of the hypervariable region 1 (HVR1) of HCV were examined in 16 patients with chronic hepatitis prior to IFN treatment. The ratio of HCV RNA titers in the top (T) and bottom (B) fractions, or T:B ratio, was 10:1 in 4 patients, 1:1 in 7, and 1:10 in 5. Three of the 4 patients with a 10:1 ratio showed a sustained response to IFN, while none of the 5 patients with a 1:10 ratio demonstrated a sustained response ( P < 0.05). All 4 patients with a 10:1 ratio had 1 or 2 SSCP bands, and 4 of the 5 patients with a 1:10 ratio had 4 or 5 bands ( P < 0.01). Furthermore, the number of SSCP bands in the top fraction from 6 sustained responders (1.8 ± 0.3) was significantly smaller than from 10 non sustained responders (4.1 ± 0.8) ( P < 0.05). Thus, patients with a high T:B ratio and low heterogeneity in HVR1 demonstrated sustained responses to IFN, while those with low T:B ratios and high heterogeneity did not. J. Med. Virol. 55:12–17, 1998 . © 1998 Wiley‐Liss, Inc.