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2015 ; 211
(12
): 1936-42
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Alveolar Macrophages Isolated Directly From Human Cytomegalovirus
(HCMV)-Seropositive Individuals Are Sites of HCMV Reactivation In Vivo
#MMPMID25552371
Poole E
; Juss JK
; Krishna B
; Herre J
; Chilvers ER
; Sinclair J
J Infect Dis
2015[Jun]; 211
(12
): 1936-42
PMID25552371
show ga
Human cytomegalovirus (HCMV) causes significant morbidity in the
immunocompromised host. Following primary infection, the virus establishes latent
infection in progenitor cells of the myeloid lineage. These cells exhibit limited
viral gene transcription and no evidence of de novo virion production. It is well
recognized that differentiation of latently infected myeloid progenitor cells to
dendritic or macrophage-like cells permits viral reactivation in vitro. This has
been used to support the concept that viral reactivation in HCMV carriers
routinely occurs from such terminally differentiated myeloid cells in vivo.
However, to date this has not been shown for in vivo-differentiated macrophages.
This study is the first to demonstrate that alveolar macrophages from HCMV
carriers express immediate early lytic genes and produce infectious virus. This
supports the view, until now based on in vitro data, that terminally
differentiated myeloid cells in vivo are sites of HCMV reactivation and potential
centers of viral dissemination in latently infected individuals with no evidence
of virus disease or dissemination.