It has recently been shown that hippocampal gamma oscillations, a network correlate of

exploratory behavior, are impaired in amyloid precursor protein (APP)-overexpressing mice. We determined Selleckchem Cl-amidine whether sharp wave-ripple complexes, which contribute to memory consolidation during slow wave-sleep, are modified in Tg2576 mice. Interestingly, neither sharp waves nor superimposed ripples were changed at pre-plaque or plaque stages. During aging, however, there was a strong reduction of sharp wave frequency and ripple energy in wild type and APP-overexpressing animals. This indicates that the reported changes in network oscillations following APP-overexpression are specific for gamma oscillations, whereas aging has a more general effect on network properties. Taken together our data suggest that non-fibrillar forms of A beta-possibly A beta oligomers-specifically interfere with synaptic function in Tg2576, but do not globally

LY3039478 datasheet alter memory-related network properties. We propose that mechanisms leading to A beta-related cognitive decline are different from those related to aging. (C) 2009 IBRO. Published by Elsevier Ltd. All rights reserved.”
“Cystic LY2874455 cost fibrosis transmembrane conductance regulator ( CFTR) is a chloride channel protein, and mutations of its gene cause cystic fibrosis. CFTR is known to be expressed in epithelial cells of the respiratory, digestive and reproductive tracts. It is also present in rat neurons and heart ganglion cells. In humans, it is expressed in the hypothalamus, but has not been identified in other parts of the human nervous system. In this study, immunohistochemistry, double-staining immunofluorescence, in situ hybridization, nested reverse transcription-PCR and relative quantification of real-time PCR

analysis were performed on spinal and sympathetic ganglia from seven human autopsies with no known nervous system disease. CFTR protein was expressed in most ganglion cells with no obvious difference in the amounts of mRNA transcript in ganglia of different sites. We conclude that CFTR protein and its mRNA were extensively expressed at relatively constant levels in human spinal and sympathetic ganglion cells, and may be important in physiological and pathological conditions. Moreover, CFTR in ganglia may be associated with pathophysiological changes seen in cystic fibrosis. Laboratory Investigation (2009) 89, 636-644; doi:10.1038/labinvest.2009.