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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
2014 ; 40
(3
): 296-310
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English Wikipedia
Pathology of SSLOW, a transmissible and fatal synthetic prion protein disorder,
and comparison with naturally occurring classical transmissible spongiform
encephalopathies
#MMPMID23578208
Jeffrey M
; McGovern G
; Makarava N
; González L
; Kim YS
; Rohwer RG
; Baskakov IV
Neuropathol Appl Neurobiol
2014[Apr]; 40
(3
): 296-310
PMID23578208
show ga
AIMS: Naturally occurring transmissible spongiform encephalopathies (TSEs)
accumulate disease-specific forms of prion protein on cell membranes in
association with pathognomonic lesions. We wished to determine whether synthetic
prion protein disorders recapitulated these and other subcellular TSE-specific
changes. METHODS: SSLOW is a TSE initiated with refolded synthetic prion protein.
Five terminally sick hamsters previously intracerebrally inoculated with third
passage SSLOW were examined using light and immunogold electron microscopy.
RESULTS: SSLOW-affected hamsters showed widespread abnormal prion protein
(PrP(SSLOW) ) and amyloid plaques. PrP(SSLOW) accumulated on plasma lemmas of
neurites and glia without pathological changes. PrP(SSLOW) also colocalized with
increased coated vesicles and pits, coated spiral membrane invaginations and
membrane microfolding. PrP(SSLOW) was additionally observed in lysosomes of
microglial cells but not of neurones or astrocytes. CONCLUSIONS: PrP(SSLOW) is
propagated by cell membrane conversion of normal PrP and lethal disease may be
linked to the progressive growth of amyloid plaques. Cell membrane changes
present in SSLOW are indistinguishable from those of naturally occurring TSEs.
However, some lesions found in SSLOW are absent in natural animal TSEs and vice
versa. SSLOW may not entirely recapitulate neuropathological features previously
described for natural disease. End-stage neuropathology in SSLOW, particularly
the nature and distribution of amyloid plaques may be significantly influenced by
the early redistribution of seeds within the inoculum and its recirculation
following interstitial, perivascular and other drainage pathways. The way in
which seeds are distributed and aggregate into plaques in SSLOW has significant
overlap with murine APP overexpressing mice challenged with A?.