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#24121956   2014/01/13 Save this To Up

PLTP deficiency impairs learning and memory capabilities partially due to alteration of amyloid-β metabolism in old mice.

Increased expression of phospholipid transfer protein (PLTP) was observed in the brains of Alzheimer's disease (AD) patients; however, the role of PLTP in the progress of AD is still poorly understood. The objective of this study was to evaluate the effect of PLTP deficiency on the recognition and metabolism of amyloid-β (Aβ) in mice. We performed the Morris water maze to determine the learning and memory capabilities of 50-week age wild type mice (WT, n = 12) and PLTP knockout mice (PLTP-/-, n = 12). The levels of Aβ and amyloid-β protein precursor (AβPP) were examined by ELISA and western blot, respectively. The levels and activity of β- and γ-secretases were determined by western blot and activity assay kit, respectively. Morris water maze results showed that PLTP deficiency significantly impaired recognition compared with WT mice. Levels of Aβ42 in the cortex and hippocampus was significantly increased, yet the levels of Aβ40 in the cortex was decreased in PLTP-/- compared with WT mice. No typical senile plaques were found in the WT or PLTP-/- mice. AβPP expression and β-secretase activity were both significantly increased in PLTP-/- mice. Moreover, PLTP deficiency increased the expression of γ-secretase catalytic units and decreased the content of apolipoprotein E. Therefore we concluded that PLTP deficiency impaired cognition and aggravated AD by enhancing the generation of Aβ in the cortex of old mice.

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#19381990   2009/09/10 Save this To Up

Differences in human phospholipid transfer protein activity following incubation of Fungizone compared to lipid-based Amphotericin-B formulations in normolipidemic and hyperlipidemic plasma.

To investigate how different formulations of Amphotericin-B (Amp-B) affect the activity of phospholipid transfer protein (PLTP) when incubated with hyperlipidemic and normolipidemic plasma at physiological temperature (37 degrees C).

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