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Provazzi PJS, Rossi LMG, Carneiro BM, Miura VC, Rosa PCR, de Carvalho LR, de Andrade STQ, Fachini RM, Grotto RMT, Silva GF, Valêncio CR, Neto PS, Cordeiro JA, Nogueira ML, Rahal P. Hierarchical assessment of host factors influencing the spontaneous resolution of hepatitis C infection. Braz J Microbiol 2018; 50:147-155. [PMID: 30637644 DOI: 10.1007/s42770-018-0008-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 04/06/2018] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Hepatitis C virus (HCV) infection is associated with chronic liver disease, resulting in cirrhosis and hepatocellular carcinoma. Approximately 20% of HCV infections are spontaneously resolved. Here, we assessed the hierarchical relevance of host factors contributing to viral clearance. METHODS DNA samples from 40 resolved infections and 40 chronic HCV patients paired by age were analyzed. Bivariate analysis was performed to rank the importance of each contributing factor in spontaneous HCV clearance. RESULTS Interestingly, 63.6% of patients with resolved infections exhibited the protective genotype CC for SNP rs12979860. Additionally, 59.3% of patients with resolved infections displayed the protective genotype TT/TT for SNP ss469415590. Moreover, a ranking of clearance factors was estimated. In order of importance, the IL28B CC genotype (OR 0.197, 95% CI 0.072-0.541) followed by the INFL4 TT/TT genotype (OR 0.237, 95% CI 0.083-0.679), and female gender (OR 0.394, 95% CI 0.159-0.977) were the main predictors for clearance of HCV infection. CONCLUSIONS HCV clearance is multifactorial and the contributing factors display a hierarchical order. Identifying all elements playing role in HCV clearance is of the most importance for HCV-related disease management. Dissecting the relevance of each contributing factor will certainly improve our understanding of the pathogenesis of HCV infection.
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Affiliation(s)
| | | | - Bruno Moreira Carneiro
- Department of Biology, São Paulo State University - UNESP, São José do Rio Preto, SP, 15054-000, Brazil
| | - Valeria Chamas Miura
- Department of Biology, São Paulo State University - UNESP, São José do Rio Preto, SP, 15054-000, Brazil
| | | | | | | | - Roberta Maria Fachini
- Department of Hepatology, São José do Rio Preto Medical School, São José do Rio Preto, SP, 15090-000, Brazil
| | | | - Giovanni Faria Silva
- Department of Internal Medicine, São Paulo State University - UNESP, Botucatu, SP, 18618-970, Brazil
| | - Carlos Roberto Valêncio
- Department of Computer Science and Statistics, São Paulo State University - UNESP, São José do Rio Preto, SP, 15054-000, Brazil
| | - Paulo Scarpelini Neto
- Department of Computer Science and Statistics, São Paulo State University - UNESP, São José do Rio Preto, SP, 15054-000, Brazil
| | - José Antonio Cordeiro
- Department of Computer Science and Statistics, São Paulo State University - UNESP, São José do Rio Preto, SP, 15054-000, Brazil
| | - Mauricio Lacerda Nogueira
- Laboratory of Virology, São José do Rio Preto Medical School, São José do Rio Preto, SP, 15090-000, Brazil
| | - Paula Rahal
- Department of Biology, São Paulo State University - UNESP, São José do Rio Preto, SP, 15054-000, Brazil.
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