Contribution of genetic and dietary insulin resistance to Alzheimer phenotype in APP/PS1 transgenic mice.
Contribution of genetic and dietary insulin resistance to Alzheimer phenotype in APP/PS1 transgenic mice.
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DOI:
10.1111/j.1582-4934.2011.01384.x
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发表时间:
2012-06
影响因子:
5.3
通讯作者:
Tanila H
中科院分区:
文献类型:
--
作者:
Hiltunen M;Khandelwal VK;Yaluri N;Tiilikainen T;Tusa M;Koivisto H;Krzisch M;Vepsäläinen S;Mäkinen P;Kemppainen S;Miettinen P;Haapasalo A;Soininen H;Laakso M;Tanila H
According to epidemiological studies, type-2 diabetes increases the risk of Alzheimer’s disease. Here, we induced hyperglycaemia in mice overexpressing mutant amyloid precursor protein and presenilin-1 (APdE9) either by cross-breeding them with pancreatic insulin-like growth factor 2 (IGF-2) overexpressing mice or by feeding them with high-fat diet. Glucose and insulin tolerance tests revealed significant hyperglycaemia in mice overexpressing IGF-2, which was exacerbated by high-fat diet. However, sustained hyperinsulinaemia and insulin resistance were observed only in mice co-expressing IGF-2 and APdE9 without correlation to insulin levels in brain. In behavioural tests in aged mice, APdE9 was associated with poor spatial learning and the combination of IGF-2 and high-fat diet further impaired learning. Neither high-fat diet nor IGF-2 increased β-amyloid burden in the brain. In male mice, IGF-2 increased β-amyloid 42/40 ratio, which correlated with poor spatial learning. In contrast, inhibitory phosphorylation of glycogen synthase kinase 3β, which correlated with good spatial learning, was increased in APdE9 and IGF-2 female mice on standard diet, but not on high-fat diet. Interestingly, high-fat diet altered τ isoform expression and increased phosphorylation of τ at Ser202 site in female mice regardless of genotype. These findings provide evidence for new regulatory mechanisms that link type-2 diabetes and Alzheimer pathology.
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影响因子:
2.8
作者:
Cannon, Christopher P.
通讯作者:
Cannon, Christopher P.
影响因子:
64.8
作者:
Phiel, CJ;Wilson, CA;Klein, PS
通讯作者:
Klein, PS
影响因子:
15.9
作者:
Devedjian, JC;George, M;Bosch, F
通讯作者:
Bosch, F
DOI:
10.1073/pnas.1000645107
发表时间:
2010-04-13
影响因子:
11.1
作者:
Takeda, Shuko;Sato, Naoyuki;Morishita, Ryuichi
通讯作者:
Morishita, Ryuichi
影响因子:
8.2
作者:
SHINO, A;MATSUO, T;SUZUOKI, Z
通讯作者:
SUZUOKI, Z