Heat shock effect upon dengue virus replication into U937 cells.
The molecules involved in dengue virus entry into human cells are currently unknown. We have previously shown that two surface heat shock proteins (Hsps), Hsp90 and Hsp70 are part of a receptor complex in monocytic cells. In the present report, the effect of heat shock (HS) on dengue virus infection is analyzed. We have documented a more than twofold increase in dengue virus infectivity after HS treatment in monocytic cells U937; this effect correlates mainly with an increase in viral entry due to a major presence of both Hsps on the surface of monocytic cells, particularly in membrane microdomains. Interestingly, since heat shock treatment at 6h post-infection also increased viral yields, it is likely that HS also modulates positively dengue virus replication.
Chavez-Salinas
Salvador
S
Departamento de Patología Experimental, Centro de Investigación y de Estudios Avanzados del IPN, Av. I.P.N. 2508, Col. San Pedro Zacatenco, México D.F. C.P. 07360, Mexico.
Ceballos-Olvera
Ivonne
I
Reyes-Del Valle
Jorge
J
Medina
Fernando
F
Del Angel
Rosa M
RM
D002462:Cell Membrane / Q000378:metabolism / Q000821:virology; D003715:Dengue / Q000378:metabolism / Q000503:physiopathology* / Q000821:virology; D003716:Dengue Virus / Q000502:physiology*; D018840:HSP70 Heat-Shock Proteins / Q000378:metabolism; D018841:HSP90 Heat-Shock Proteins / Q000378:metabolism; D018869:Heat-Shock Response; D006801:Humans; D009000:Monocytes / Q000502:physiology* / Q000821:virology; D020298:U937 Cells; D053586:Virus Internalization; D014779:Virus Replication
D018840:HSP70 Heat-Shock Proteins; D018841:HSP90 Heat-Shock Proteins