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2017 ; 127
(ä): 53-61
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gab.com Text
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English Wikipedia
The mouse cortical meninges are the site of immune responses to many different
pathogens, and are accessible to intravital imaging
#MMPMID28351758
Coles JA
; Stewart-Hutchinson PJ
; Myburgh E
; Brewer JM
Methods
2017[Aug]; 127
(ä): 53-61
PMID28351758
show ga
A wide range of viral and microbial infections are known to cause meningitis, and
there is evidence that the meninges are the gateway to pathogenic invasion of the
brain parenchyma. Hence observation of these regions has wide application to
understanding host-pathogen interactions. Interactions between pathogens and
cells of the immune response can be modified by changes in their environment,
such as suppression of the flow of blood and lymph, and, particularly in the case
of the meninges, with their unsupported membranes, invasive dissection can alter
the tissue architecture. For these reasons, intravital imaging through the
unperforated skull is the method of choice. We give a protocol for a simple
method of two-photon microscopy through the thinned cortical skull of the
anesthetized mouse to enable real-time imaging with sub-micron resolution through
the meninges and into the superficial brain parenchyma. In reporter mice in which
selected cell types express fluorescent proteins, imaging after infection with
fluorescent pathogens (lymphocytic choriomeningitis virus, Trypanosoma brucei or
Plasmodium berghei) has shown strong recruitment to the cortical meninges of
immune cells, including neutrophils, T cells, and putative dendritic cells and
macrophages. Without special labeling, the boundaries between the dura mater, the
leptomeninx, and the parenchyma are not directly visualized in intravital
two-photon microscopy, but other landmarks and characteristics, which we
illustrate, allow the researcher to identify the compartment being imaged. While
most infectious meningitides are localized mainly in the dura mater, others
involve recruitment of immune cells to the leptomeninx.