The presence of a second DENV-4 component confers induction
of markers that are key in dendritic cell (DC) migration.
(A, B) Monocyte-derived DCs (MDDCs) were infected with
mock, trivalent vaccine, tetravalent vaccine or
DEN-4Δ30 × 2 formulation. Multiplex ELISA was performed as
in previous experiments to quantify the levels of MCP-1
and RANTES secretion, respectively, to the culture
supernatant at 6, 24, and 48 hpi. (C) Using mass cytometry
by time-of-flight (CyTOF) analysis for each mock,
trivalent vaccine, tetravalent vaccine, or DEN-4Δ30 × 2
formulation sample. The percent of cells expressing CCR7
was quantified. (D) CyTOF depicting the median expression
of CD40 of total cell populations is shown. Black
asterisks represent statistical significance by the
two-way analysis of variance (ANOVA), with adjustment for
multiple comparisons and the Bonferroni correction
(*P ⩽ 0.05,
**P ⩽ 0.01,
**P ⩽ 0.001). (A color version of this
figure is available in the online journal.)