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Abstract:

Hepatitis B virus (HBV) genotypes and mutants have been associated with differences in clinical and virological characteristics. Autophagy is a cellular process that degrades long-lived proteins and damaged organelles. Viruses have evolved mechanisms to alter this process to survive in host cells. In this work, we studied the modulation of autophagy by the replication of HBV subgenotypes F1b and F4, and the naturally occurring mutants BCP and preCore. HBV subgenotypes F1b and F4 replication induced accumulation of autophagosomes in hepatoma cells. However, no autophagic protein degradation was observed, indicating a blockage of autophagic flux at later stages. This inhibition of autophagy flux might be due to an impairment of lysosomal acidification in hepatoma cells. Moreover, HBV-mediated autophagy modulation was independent of the viral subgenotypes and enhanced in viruses with BCP and preCore naturally occurring mutations. These results contribute to understand the mechanisms by which different HBV variants contribute to the pathogenesis of HBV infections. In addition, this study is the first to describe the role that two highly prevalent naturally occurring mutations exert on the modulation of HBV-induced autophagy. © 2018 Elizalde et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Registro:

Documento: Artículo
Título:HBV subgenotypes F1b and F4 replication induces an incomplete autophagic process in hepatocytes: Role of BCP and preCore mutations
Autor:Elizalde, M.M.; Pérez, P.S.; Sevic, I.; Grasso, D.; Ropolo, A.; Barbini, L.; Campos, R.H.; Vaccaro, M.I.; Flichman, D.M.
Filiación:Cátedra de Virología, Departamento de Microbiología, Inmunología, Biotecnología y Genética, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Instituto de Bioquímica y Medicina Molecular, Departamento de Fisiopatología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
Palabras clave:acidification; article; autophagosome; autophagy; Hepatitis B virus; hepatoma cell; human cell; liver cell; lysosome; modulation; mutation; nonhuman; protein degradation
Año:2018
Volumen:13
Número:5
DOI: http://dx.doi.org/10.1371/journal.pone.0197109
Título revista:PLoS ONE
Título revista abreviado:PLoS ONE
ISSN:19326203
CODEN:POLNC
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19326203_v13_n5_p_Elizalde

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Citas:

---------- APA ----------
Elizalde, M.M., Pérez, P.S., Sevic, I., Grasso, D., Ropolo, A., Barbini, L., Campos, R.H.,..., Flichman, D.M. (2018) . HBV subgenotypes F1b and F4 replication induces an incomplete autophagic process in hepatocytes: Role of BCP and preCore mutations. PLoS ONE, 13(5).
http://dx.doi.org/10.1371/journal.pone.0197109
---------- CHICAGO ----------
Elizalde, M.M., Pérez, P.S., Sevic, I., Grasso, D., Ropolo, A., Barbini, L., et al. "HBV subgenotypes F1b and F4 replication induces an incomplete autophagic process in hepatocytes: Role of BCP and preCore mutations" . PLoS ONE 13, no. 5 (2018).
http://dx.doi.org/10.1371/journal.pone.0197109
---------- MLA ----------
Elizalde, M.M., Pérez, P.S., Sevic, I., Grasso, D., Ropolo, A., Barbini, L., et al. "HBV subgenotypes F1b and F4 replication induces an incomplete autophagic process in hepatocytes: Role of BCP and preCore mutations" . PLoS ONE, vol. 13, no. 5, 2018.
http://dx.doi.org/10.1371/journal.pone.0197109
---------- VANCOUVER ----------
Elizalde, M.M., Pérez, P.S., Sevic, I., Grasso, D., Ropolo, A., Barbini, L., et al. HBV subgenotypes F1b and F4 replication induces an incomplete autophagic process in hepatocytes: Role of BCP and preCore mutations. PLoS ONE. 2018;13(5).
http://dx.doi.org/10.1371/journal.pone.0197109