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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Neuropathol+Appl+Neurobiol
2015 ; 41
(4
): 557-70
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Immunolocalization of platelet-derived growth factor receptor-? (PDGFR-?) and
pericytes in cerebral autosomal dominant arteriopathy with subcortical infarcts
and leukoencephalopathy (CADASIL)
#MMPMID25303037
Craggs LJ
; Fenwick R
; Oakley AE
; Ihara M
; Kalaria RN
Neuropathol Appl Neurobiol
2015[Jun]; 41
(4
): 557-70
PMID25303037
show ga
AIMS: Cerebral autosomal dominant arteriopathy with subcortical infarcts and
leukoencephalopathy (CADASIL) is identified by aggregates of NOTCH3 extracellular
domain (N3ECD) along capillaries and the deposition of granular osmiophilic
material (GOM). We assessed the pattern of distribution of pericytes in relation
to N3ECD deposits in cerebral microvessels of CADASIL subjects. METHODS: We
assessed post mortem brains from (n?=?50) subjects with CADASIL, cerebral small
vessel disease, and similar-age cognitively normal and older controls.
Immunohistochemical and immunofluorescent staining methods were used to study the
distribution and quantify immunoreactivities of the platelet-derived growth
factor receptor-? (PDGFR-?) (for pericytes) and microvascular markers in the
frontal cortex and white matter. RESULTS: PDGFR-? antibody stained cells typical
of pericytes in capillaries and small arterioles in both the grey and white
matter. PDGFR-? reactive pericytes adopted 'crescent' morphology wrapped closely
around capillary walls readily evident in cross-sections. We noted considerable
overlap between PDGFR-? and N3ECD imunoreactivities in capillaries. Quantitative
analysis of PDGFR-? immunoreactivity revealed significant differences in PDGFR-?
%A in CADASIL compared with young controls (P?0.05). PDGFR-? %A was further
positively correlated with the basement membrane marker collagen IV (r?=?0.529,
P?=?0.009), but was not associated with GLUT-1, the marker for endothelial cells.
CONCLUSIONS: Our results suggest increased expression of PDGFR-? immunoreactive
pericytes in cerebral microvessels in CADASIL compared with similar age controls.
While we cannot confirm whether PDGFR-?-expressing pericytes produce N3ECD and
hence GOM, our findings demonstrate that up-regulation of pericyte-like cells is
associated with microvascular changes, including loss of vascular smooth muscle
cells in CADASIL.