Secretome of HepG2 cells infected with dengue virus: implications for pathogenesis.
Viral hemorrhagic fever is a clinical syndrome that poses serious global health threat. Among the causative agents, dengue virus (DV) has the highest incidence rate and its infection is the major cause of viral hemorrhagic fever in the world. Although the pathophysiological mechanisms of DV-induced diseases are not yet understood, it is well accepted that liver is a site of viral replication. In this study, we used proteomics to analyze infection of a hepatic cell lineage, HepG2, with DV, focusing on the secreted proteins. 1D-electrophoresis and liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) were used, allowing the identification of a total of 107 proteins, among which 35 were found only in control secretome and 24 only in infected cells secretome. To validate these data, we performed 2D-eletrophoresis followed by MALDI-TOF/TOF, resulting in the identification of 20 proteins, 8 of them confirming LC-MS/MS results. We discuss the results obtained taking into account the proteins previously described in the secretome of HepG2 cells, proteins present in human plasma and proteins of interest for dengue pathogenesis. Altogether the data presented here provide clues for the progress in the understanding of the role of liver secretion in the progression of the disease.
Higa
Luiza M
LM
Rede Proteômica do Rio de Janeiro, Brazil.
Caruso
Marjolly B
MB
Canellas
Flávia
F
Soares
Marcia R
MR
Oliveira-Carvalho
Ana Lúcia
AL
Chapeaurouge
Donat A
DA
Almeida
Priscila M
PM
Perales
Jonas
J
Zingali
Russolina B
RB
Da Poian
Andrea T
AT
D002460:Cell Line / Q000378:metabolism*; D003715:Dengue / Q000209:etiology* / Q000473:pathology; D003716:Dengue Virus / Q000472:pathogenicity / Q000502:physiology*; D015180:Electrophoresis, Gel, Two-Dimensional; D022781:Hepatocytes / Q000378:metabolism*; D054884:Host-Pathogen Interactions / Q000502:physiology; D006801:Humans; D053858:Metabolic Networks and Pathways / Q000502:physiology; D020543:Proteome / Q000032:analysis* / Q000302:isolation & purification / Q000378:metabolism
D020543:Proteome