[PDF][PDF] Zika virus spreads through infection of lymph node-resident macrophages

GV Reynoso, DN Gordon, A Kalia, CC Aguilar… - Cell reports, 2023 - cell.com
GV Reynoso, DN Gordon, A Kalia, CC Aguilar, CS Malo, M Aleshnick, KA Dowd, CR Cherry
Cell reports, 2023cell.com
To disseminate through the body, Zika virus (ZIKV) is thought to exploit the mobility of
myeloid cells, in particular monocytes and dendritic cells. However, the timing and
mechanisms underlying shuttling of the virus by immune cells remains unclear. To
understand the early steps in ZIKV transit from the skin, at different time points, we spatially
mapped ZIKV infection in lymph nodes (LNs), an intermediary site en route to the blood.
Contrary to prevailing hypotheses, migratory immune cells are not required for the virus to …
Summary
To disseminate through the body, Zika virus (ZIKV) is thought to exploit the mobility of myeloid cells, in particular monocytes and dendritic cells. However, the timing and mechanisms underlying shuttling of the virus by immune cells remains unclear. To understand the early steps in ZIKV transit from the skin, at different time points, we spatially mapped ZIKV infection in lymph nodes (LNs), an intermediary site en route to the blood. Contrary to prevailing hypotheses, migratory immune cells are not required for the virus to reach the LNs or blood. Instead, ZIKV rapidly infects a subset of sessile CD169+ macrophages in the LNs, which release the virus to infect downstream LNs. Infection of CD169+ macrophages alone is sufficient to initiate viremia. Overall, our experiments indicate that macrophages that reside in the LNs contribute to initial ZIKV spread. These studies enhance our understanding of ZIKV dissemination and identify another anatomical site for potential antiviral intervention.
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