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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Detection of hepatitis C virus replication by In situ hybridization in epithelial cells of anti-hepatitis C virus-positive patients with and without oral lichen planus.
Epidemiological studies have demonstrated that there is a correlation between oral lichen planus and chronic hepatitis C virus (HCV) infection. HCV RNA has been recently detected in epithelial cells from oral lichen planus lesions by reverse-transcription polymerase chain reaction (RT-PCR). However, this technique does not discriminate which types of cells are infected by the virus or if the viral RNA is present in the serum that contaminates the biopsy. Morphological evidence of viral replication in cells from these lesions is needed to establish a role for HCV in oral lichen planus. Consequently, we have analyzed the presence of positive and negative HCV-RNA strands in oral mucosa biopsies from 23 patients (14 anti-HCV-positive) diagnosed as having oral lichen planus and from 5 patients with chronic hepatitis C without oral lichen planus. Positive and negative HCV-RNA strands were detected in epithelial cells of the mucosa biopsies from all anti-HCV-positive patients independently of whether or not they had oral lichen planus, but in none of the anti-HCV-negative cases. The percentage of stained cells ranged from 4.4% to 14.3%. These percentages do not correlate with the serum viremia levels or the intensity of the cellular infiltrate in patients with oral lichen planus. In conclusion, we have shown that HCV replicates in epithelial cells of patients with and without oral lichen planus. The pathological consequences of this finding remain to be elucidated.
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