TY - JOUR
T1 - β-Amyloid deposition in brain is enhanced in mouse models of arterial hypertension
AU - Gentile, Maria Teresa
AU - Poulet, Roberta
AU - Pardo, Alba D.
AU - Cifelli, Giuseppe
AU - Maffei, Angelo
AU - Vecchione, Carmine
AU - Passarelli, Francesca
AU - Landolfi, Alessandro
AU - Carullo, Pierluigi
AU - Lembo, Giuseppe
PY - 2009/2
Y1 - 2009/2
N2 - There are conflicting evidence regarding the association of hypertension with Alzheimer's disease (AD), and so far it is still unexplored whether increased blood pressure levels can be mechanistically related to the pathophysiology of AD. Since the deposition of β-amyloid (Aβ) in brain represents the first pathogenetic event in the onset of AD, in this study we investigated the role of hypertension in the brain deposition of Aβ. We analyzed two independent mouse models of hypertension. In both models we observed an increased permeability of blood-brain barrier in cortex and hippocampus. More interestingly, in the same areas hypertensive mice showed a marked positivity to anti-Aβ antibodies and the presence of Aβ-like fragments. Finally, we analyzed mice after passive immunotherapy with anti-Aβ IgG. We observed that this latter approach determined a markedly reduced Aβ immunopositivity in both cortex and hippocampus. Our study demonstrates that chronic hypertension determines an impairment of the blood-brain barrier permeability with deposition of Aβ in brain tissue and that passive immunotherapy prevents this latter phenomenon.
AB - There are conflicting evidence regarding the association of hypertension with Alzheimer's disease (AD), and so far it is still unexplored whether increased blood pressure levels can be mechanistically related to the pathophysiology of AD. Since the deposition of β-amyloid (Aβ) in brain represents the first pathogenetic event in the onset of AD, in this study we investigated the role of hypertension in the brain deposition of Aβ. We analyzed two independent mouse models of hypertension. In both models we observed an increased permeability of blood-brain barrier in cortex and hippocampus. More interestingly, in the same areas hypertensive mice showed a marked positivity to anti-Aβ antibodies and the presence of Aβ-like fragments. Finally, we analyzed mice after passive immunotherapy with anti-Aβ IgG. We observed that this latter approach determined a markedly reduced Aβ immunopositivity in both cortex and hippocampus. Our study demonstrates that chronic hypertension determines an impairment of the blood-brain barrier permeability with deposition of Aβ in brain tissue and that passive immunotherapy prevents this latter phenomenon.
KW - β-Amyloid
KW - Blood-brain barrier
KW - Brain
KW - Hypertension
KW - Immunotherapy
UR - http://www.scopus.com/inward/record.url?scp=57749116386&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57749116386&partnerID=8YFLogxK
U2 - 10.1016/j.neurobiolaging.2007.06.005
DO - 10.1016/j.neurobiolaging.2007.06.005
M3 - Article
C2 - 17673335
AN - SCOPUS:57749116386
VL - 30
SP - 222
EP - 228
JO - Neurobiology of Aging
JF - Neurobiology of Aging
SN - 0197-4580
IS - 2
ER -