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1981 ; 31
(2
): 751-7
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Interaction of influenza virus with mouse macrophages
#MMPMID6260676
Rodgers B
; Mims CA
Infect Immun
1981[Feb]; 31
(2
): 751-7
PMID6260676
show ga
Mouse peritoneal and alveolar macrophages differed substantially in their
response to influenza in vitro. Immunofluorescent and infectious-center
techniques showed that viral proteins were produced in only a small subpopulation
(17%) of peritoneal macrophages and that these infected cells were removed from
culture by 3 days postinfection. In contrast, alveolar macrophages were highly
susceptible to influenza, and viral antigens were produced in all cells. This was
accompanied by a cytopathic effect and cell death. However, no infectious virus
was released and the infection was considered abortive. With mouse
cytomegalovirus, however, both alveolar and peritoneal macrophages were equally
restrictive, and viral antigens were produced in only 1 to 5% of either cell
population. No significant differences were observed between mouse-virulent and
-avirulent strains of influenza in their interaction with macrophages either in
vitro or in vivo. In vivo, both strains induced an influx of cells to the
alveolar spaces by 3 to 4 days postinfection, and this was reflected by a 5- to
10-fold increase in the number of "macrophages" in harvest fluids at this time.
Many of these cells had an altered morphology compared with alveolar macrophages
from uninfected mice, and the cell population as a whole was not susceptible to
influenza. However, this resistance was lost by 7 days of in vitro culture.