TY - JOUR
T1 - Neuroprotection from Stroke in the Absence of MHCI or PirB
AU - Adelson, Jaimie D.
AU - Barreto, George E.
AU - Xu, Lijun
AU - Kim, Taeho
AU - Brott, Barbara K.
AU - Ouyang, Yi Bing
AU - Naserke, Thorsten
AU - Djurisic, Maja
AU - Xiong, Xiaoxing
AU - Shatz, Carla J.
AU - Giffard, Rona G.
N1 - Copyright © 2012 Elsevier Inc. All rights reserved.
PY - 2012/3/22
Y1 - 2012/3/22
N2 - Recovery from stroke engages mechanisms of neural plasticity. Here we examine a role for MHC class I (MHCI) H2-Kb and H2-Db, as well as PirB receptor. These molecules restrict synaptic plasticity and motor learning in the healthy brain. Stroke elevates neuronal expression not only of H2-Kb and H2-Db, but also of PirB and downstream signaling. KbDb knockout (KO) or PirB KO mice have smaller infarcts and enhanced motor recovery. KO hippocampal organotypic slices, which lack an intact peripheral immune response, have less cell death after in vitro ischemia. In PirB KO mice, corticospinal projections from the motor cortex are enhanced, and the reactive astrocytic response is dampened after MCAO. Thus, molecules that function in the immune system act not only to limit synaptic plasticity in healthy neurons, but also to exacerbate brain injury after ischemia. These results suggest therapies for stroke by targeting MHCI and PirB. Adelson et al. find that MHC class I (MHCI) H2-Kb and K2-Db and their receptor, PirB, contribute to damage and restrict recovery after stroke. Levels of these molecules increase dramatically after stroke and their removal causes enhanced recovery, suggesting new therapeutic avenues.
AB - Recovery from stroke engages mechanisms of neural plasticity. Here we examine a role for MHC class I (MHCI) H2-Kb and H2-Db, as well as PirB receptor. These molecules restrict synaptic plasticity and motor learning in the healthy brain. Stroke elevates neuronal expression not only of H2-Kb and H2-Db, but also of PirB and downstream signaling. KbDb knockout (KO) or PirB KO mice have smaller infarcts and enhanced motor recovery. KO hippocampal organotypic slices, which lack an intact peripheral immune response, have less cell death after in vitro ischemia. In PirB KO mice, corticospinal projections from the motor cortex are enhanced, and the reactive astrocytic response is dampened after MCAO. Thus, molecules that function in the immune system act not only to limit synaptic plasticity in healthy neurons, but also to exacerbate brain injury after ischemia. These results suggest therapies for stroke by targeting MHCI and PirB. Adelson et al. find that MHC class I (MHCI) H2-Kb and K2-Db and their receptor, PirB, contribute to damage and restrict recovery after stroke. Levels of these molecules increase dramatically after stroke and their removal causes enhanced recovery, suggesting new therapeutic avenues.
UR - http://www.scopus.com/inward/record.url?scp=84863338224&partnerID=8YFLogxK
U2 - 10.1016/j.neuron.2012.01.020
DO - 10.1016/j.neuron.2012.01.020
M3 - Article
C2 - 22445338
AN - SCOPUS:84863338224
SN - 0896-6273
VL - 73
SP - 1100
EP - 1107
JO - Neuron
JF - Neuron
IS - 6
ER -