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2018 ; 13
(5
): e0196893
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English Wikipedia
Borrelia burgdorferi adhere to blood vessels in the dura mater and are associated
with increased meningeal T cells during murine disseminated borreliosis
#MMPMID29723263
Divan A
; Casselli T
; Narayanan SA
; Mukherjee S
; Zawieja DC
; Watt JA
; Brissette CA
; Newell-Rogers MK
PLoS One
2018[]; 13
(5
): e0196893
PMID29723263
show ga
Borrelia burgdorferi, the causative agent of Lyme disease, is a vector-borne
bacterial infection that is transmitted through the bite of an infected tick. If
not treated with antibiotics during the early stages of infection, disseminated
infection can spread to the central nervous system (CNS). In non-human primates
(NHPs) it has been demonstrated that the leptomeninges are among the tissues
colonized by B. burgdorferi spirochetes. Although the NHP model parallels aspects
of human borreliosis, a small rodent model would be ideal to study the
trafficking of spirochetes and immune cells into the CNS. Here we show that
during early and late disseminated infection, B. burgdorferi infects the meninges
of intradermally infected mice, and is associated with concurrent increases in
meningeal T cells. We found that the dura mater was consistently culture positive
for spirochetes in transcardially perfused mice, independent of the strain of B.
burgdorferi used. Within the dura mater, spirochetes were preferentially located
in vascular regions, but were also present in perivascular, and extravascular
regions, as late as 75 days post-infection. At the same end-point, we observed
significant increases in the number of CD3+ T cells within the pia and dura
mater, as compared to controls. Flow cytometric analysis of leukocytes isolated
from the dura mater revealed that CD3+ cell populations were comprised of both
CD4 and CD8 T cells. Overall, our data demonstrate that similarly to infection in
peripheral tissues, spirochetes adhere to the dura mater during disseminated
infection, and are associated with increases in the number of meningeal T cells.
Collectively, our results demonstrate that there are aspects of B. burgdorferi
meningeal infection that can be modelled in laboratory mice, suggesting that mice
may be useful for elucidating mechanisms of meningeal pathogenesis by B.
burgdorferi.