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Hierarchical assessment of host factors influencing the spontaneous resolution of hepatitis C infection

  • Clinical Microbiology - Research Paper
  • Published:
Brazilian Journal of Microbiology Aims and scope Submit manuscript

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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Funding

This work was supported by Foundation for Research Support of the State of São Paulo (FAPESP - 2014/22198-0) and the Brazilian National Council for Scientific and Technological Development (CNPq - 2015/34857; 2010/15686).

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Authors and Affiliations

  1. Department of Biology, São Paulo State University – UNESP, São José do Rio Preto, SP, 15054-000, Brazil

    Paola Jocelan Scarin Provazzi, Livia Maria Gonçalves Rossi, Bruno Moreira Carneiro, Valeria Chamas Miura, Plinio Cesar Rodrigues Rosa, Lucas Rodrigues de Carvalho, Stephane Tereza Queiroz de Andrade & Paula Rahal

  2. Department of Hepatology, São José do Rio Preto Medical School, São José do Rio Preto, SP, 15090-000, Brazil

    Roberta Maria Fachini

  3. Department of Internal Medicine, São Paulo State University – UNESP, Botucatu, SP, 18618-970, Brazil

    Rejane Maria Tommasini Grotto & Giovanni Faria Silva

  4. Department of Computer Science and Statistics, São Paulo State University – UNESP, São José do Rio Preto, SP, 15054-000, Brazil

    Carlos Roberto Valêncio, Paulo Scarpelini Neto & José Antonio Cordeiro

  5. Laboratory of Virology, São José do Rio Preto Medical School, São José do Rio Preto, SP, 15090-000, Brazil

    Mauricio Lacerda Nogueira

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  1. Paola Jocelan Scarin Provazzi
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Contributions

PJSP, PR, LMGR, GV, and BMC wrote of the manuscript. PJSP, PR, and MLN conceived and designed the experiments; PJSP, BMC, VCM, PCRR, LRC, and STQA performed the experiments; RMF, RMTG, GFS, CRV, and PSN performed the management of samples collection and patients’ data; PJSP, PR, LMGR, BMC, and JAC analyzed the data.

Corresponding author

Correspondence to Paula Rahal.

Ethics declarations

The project was approved by the in-house Ethics Committee of Sao Paulo State University (IBILCE-UNESP, São José do Rio Preto) (No. 049/09), and all participants signed an informed consent form.

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The authors declare that they have no conflict of interest.

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Provazzi, P.J.S., Rossi, L.M.G., Carneiro, B.M. et al. Hierarchical assessment of host factors influencing the spontaneous resolution of hepatitis C infection. Braz J Microbiol 50, 147–155 (2019). https://doi.org/10.1007/s42770-018-0008-3

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