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M9550887.TXT
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1995-03-25
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Document 0887
DOCN M9550887
TI Stress-induced glucocorticoid response modulates mononuclear cell
trafficking during an experimental influenza viral infection.
DT 9505
AU Hermann G; Beck FM; Sheridan JF; Department of Medical Microbiology and
Immunology, College of; Medicine, Ohio State University, Columbus 43210.
SO J Neuroimmunol. 1995 Feb;56(2):179-86. Unique Identifier : AIDSLINE
MED/95164656
AB The migration, distribution, and localization of lymphoid cells
throughout the body is critical to the efficiency and development of the
immune response. This study examined the role of endogenous
glucocorticoids in mononuclear cell (MNC) trafficking during the
development of an immune response to infection by influenza A/PR8 virus.
Accumulation of MNC in the draining lymph nodes and at the site of virus
replication (lungs) was studied in infected mice, and infected mice
subjected to a stressor (physical restraint). The glucocorticoid
antagonist, RU486, was used to block the activity of endogenous
corticosterone during development of the immune response. PR8-infected
mice demonstrated an elevation in circulating corticosterone regardless
of whether they were treated with RU486 or a placebo. Thus, some
'afferent' signal associated with the infection, and/or the immune
response to infection, activated the hypothalamic-pituitary-adrenal axis
(HPA) and was not subject to negative feedback regulation. The initial
accumulation of MNC in the draining lymph nodes and lungs during
infection, however, was independent of the glucocorticoid response. Our
previous studies demonstrated that virally infected animals subjected to
physical restraint had highly elevated plasma corticosterone levels,
suppressed lymphadenopathy, and reduced accumulation of MNC in the
lungs. In the present study, RU486 treatment restored cellularity to the
draining lymph nodes and enhanced accumulation of MNC in lungs of
stressed, A/PR8 virus-infected mice.
DE Animal Cell Movement Corticosterone/*BLOOD
Influenza/*IMMUNOLOGY/PATHOLOGY Leukocytes, Mononuclear/*PHYSIOLOGY
Lung/PATHOLOGY Lymph Nodes/PATHOLOGY Male Mice Mice, Inbred C57BL
Mifepristone/PHARMACOLOGY Nitric Oxide/PHYSIOLOGY Orthomyxoviruses
Type A Stress/*BLOOD Support, U.S. Gov't, P.H.S. JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).