Brazilian Journal of Microbiology

, Volume 50, Issue 1, pp 147–155 | Cite as

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

  • 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
  • Roberta Maria Fachini
  • Rejane Maria Tommasini Grotto
  • Giovanni Faria Silva
  • Carlos Roberto Valêncio
  • Paulo Scarpelini Neto
  • José Antonio Cordeiro
  • Mauricio Lacerda Nogueira
  • Paula RahalEmail author
Clinical Microbiology - Research Paper



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.


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.


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.


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.


Hepatitis C HCV MAVS SNP rs12979860 IL28B 


Author 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.


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).

Compliance with ethical standards

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.

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Sociedade Brasileira de Microbiologia 2018

Authors and Affiliations

  • Paola Jocelan Scarin Provazzi
    • 1
  • Livia Maria Gonçalves Rossi
    • 1
  • Bruno Moreira Carneiro
    • 1
  • Valeria Chamas Miura
    • 1
  • Plinio Cesar Rodrigues Rosa
    • 1
  • Lucas Rodrigues de Carvalho
    • 1
  • Stephane Tereza Queiroz de Andrade
    • 1
  • Roberta Maria Fachini
    • 2
  • Rejane Maria Tommasini Grotto
    • 3
  • Giovanni Faria Silva
    • 3
  • Carlos Roberto Valêncio
    • 4
  • Paulo Scarpelini Neto
    • 4
  • José Antonio Cordeiro
    • 4
  • Mauricio Lacerda Nogueira
    • 5
  • Paula Rahal
    • 1
    Email author
  1. 1.Department of BiologySão Paulo State University – UNESPSão José do Rio PretoBrazil
  2. 2.Department of HepatologySão José do Rio Preto Medical SchoolSão José do Rio PretoBrazil
  3. 3.Department of Internal MedicineSão Paulo State University – UNESPBotucatuBrazil
  4. 4.Department of Computer Science and StatisticsSão Paulo State University – UNESPSão José do Rio PretoBrazil
  5. 5.Laboratory of VirologySão José do Rio Preto Medical SchoolSão José do Rio PretoBrazil

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