<b>Quantitative analysis of HCV RNA and genotype in patients with chronic hepatitis C accompanied by oral lichen planus</b>

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<jats:p>Lichen planus (LP) is a common oral disorder that may represent a mucosal reaction to a variety of factors, including hepatitis C virus (HCV). To determine whether viral factors play a role in oral lichen planus (OLP) pathogenesis, we measured serum HCV RNA and determined HCV genotype in patients with chronic hepatitis C accompanied by OLP. The subjects included 43 patients with chronic hepatitis C: 23 with OLP (group 1) and 20 without OLP (group 2). Serum was collected from all subjects and used to quantify HCV RNA by the branched DNA signal amplification assay; HCV genotypes were classified by the reverse transcription–polymerase chain reaction (RT–PCR) method into types I, II, III and IV. Comparison of patient characteristics disclosed that the mean age of group 1, 60.7 years, was significantly higher (<jats:italic>P</jats:italic>=0.001) than that of group 2 (46.4 years). No significant differences were seen between sexes in values of serum aspartate aminotransferase (AST), alanine aminotransferase (ALT), total protein (T protein), albumin and gamma‐globulin. There were also no significant differences in HCV RNA levels or HCV genotypes between groups. The findings suggested that OLP pathogenesis was a result of host factors rather than viral factors.</jats:p>

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