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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 J+Cereb+Blood+Flow+Metab
2014 ; 34
(7
): 1223-32
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Repeated mild traumatic brain injury causes chronic neuroinflammation, changes in
hippocampal synaptic plasticity, and associated cognitive deficits
#MMPMID24756076
Aungst SL
; Kabadi SV
; Thompson SM
; Stoica BA
; Faden AI
J Cereb Blood Flow Metab
2014[Jul]; 34
(7
): 1223-32
PMID24756076
show ga
Repeated mild traumatic brain injury (mTBI) can cause sustained cognitive and
psychiatric changes, as well as neurodegeneration, but the underlying mechanisms
remain unclear. We examined histologic, neurophysiological, and cognitive changes
after single or repeated (three injuries) mTBI using the rat lateral fluid
percussion (LFP) model. Repeated mTBI caused substantial neuronal cell loss and
significantly increased numbers of activated microglia in both ipsilateral and
contralateral hippocampus on post-injury day (PID) 28. Long-term potentiation
(LTP) could not be induced on PID 28 after repeated mTBI in ex vivo hippocampal
slices from either hemisphere. N-Methyl-D-aspartate (NMDA) receptor-mediated
responses were significantly attenuated after repeated mTBI, with no significant
changes in ?-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)
receptor-mediated responses. Long-term potentiation was elicited in slices after
single mTBI, with potentiation significantly increased in ipsilateral versus
contralateral hippocampus. After repeated mTBI, rats displayed cognitive
impairments in the Morris water maze (MWM) and novel object recognition (NOR)
tests. Thus, repeated mTBI causes deficits in the hippocampal function and
changes in excitatory synaptic neurotransmission, which are associated with
chronic neuroinflammation and neurodegeneration.