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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 Neurobiol+Aging
2013 ; 34
(10
): 2352-60
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Amyloid beta and the longest-lived rodent: the naked mole-rat as a model for
natural protection from Alzheimer s disease
#MMPMID23618870
Edrey YH
; Medina DX
; Gaczynska M
; Osmulski PA
; Oddo S
; Caccamo A
; Buffenstein R
Neurobiol Aging
2013[Oct]; 34
(10
): 2352-60
PMID23618870
show ga
Amyloid beta (A?) is implicated in Alzheimer's disease (AD) as an integral
component of both neural toxicity and plaque formation. Brains of the
longest-lived rodents, naked mole-rats (NMRs) approximately 32 years of age, had
levels of A? similar to those of the 3xTg-AD mouse model of AD. Interestingly,
there was no evidence of extracellular plaques, nor was there an age-related
increase in A? levels in the individuals examined (2-20+ years). The NMR A?
peptide showed greater homology to the human sequence than to the mouse sequence,
differing by only 1 amino acid from the former. This subtle difference led to
interspecies differences in aggregation propensity but not neurotoxicity; NMR A?
was less prone to aggregation than human A?. Nevertheless, both NMR and human A?
were equally toxic to mouse hippocampal neurons, suggesting that A? neurotoxicity
and aggregation properties were not coupled. Understanding how NMRs acquire and
tolerate high levels of A? with no plaque formation could provide useful insights
into AD, and may elucidate protective mechanisms that delay AD progression.
|*Aging/metabolism/pathology
[MESH]
|*Disease Models, Animal
[MESH]
|*Mole Rats
[MESH]
|Alzheimer Disease/metabolism/pathology/*prevention & control
[MESH]