E-viri
Recenzirano
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de Almeida, Adilson José; Campos-de-Magalhães, Marilza; de Melo Marçal, Olívia Pereira; Brandão-Mello, Carlos Eduardo; Okawa, Margareti Yumi; de Oliveira, Rosane Vieira; do Espírito-Santo, Márcia Paschoal; Yoshida, Clara Fumiko Tachibana; Lampe, Elisabeth
Annals of hematology, 07/2004, Letnik: 83, Številka: 7Journal Article
Chronic hepatitis C virus (HCV) infection has also been associated with the development of several extrahepatic alterations, including thrombocytopenia, and a variety of pathogenic mechanisms are reported to be implicated in this hematological abnormality. Different studies have succeeded in detecting HCV in platelets with discrepant results. Moreover, most of the studies on HCV-associated thrombocytopenia have failed to provide data concerning the infecting genotype, a factor with prognostic implication in chronically HCV-infected patients. To determine whether thrombocytopenia is an extrahepatic alteration dependent on particular HCV genotypes, and to assess the relationship between thrombocytopenia and detection of HCV-RNA (positive strand) in platelets from patients with chronic HCV infection, 106 anti-HCV+/HCV-RNA+ patients (57 thrombocytopenic and 49 non-thrombocytopenic) were prospectively studied. The infecting genotype was analyzed from sera by using direct nucleotide sequencing of the polymerase chain reaction (PCR) products from core region. Genotypes 1a, 1b, and 3a were more prevalent in our patients, and no association between these genotypes and thrombocytopenia was observed ( p=0.891). HCV-RNA was detected in platelets by reverse transcriptase (RT)-nested PCR in the 5' non-coding region with a higher frequency (60%) in thrombocytopenic patients than in non-thrombocytopenic subjects (35%, p=0.017), suggesting that HCV is directly involved in the process that, at least in part, leads to thrombocytopenia.
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