Neurons from differentiated cultures were purified with fluorescence-activated cell

sorting and characterized. Purified cultures contained more than 90% neurons, clustered with fetal brain messenger RNA samples by microarray criteria, and could form functional synaptic contacts. Virtually all cells exhibited Volasertib Cell Cycle inhibitor normal electrophysiological activity. Relative to controls, iPSC-derived, purified neurons from the two APP(Dp) patients and patient sAD2 exhibited significantly higher levels of the pathological markers amyloid-beta(1-40), phospho-tau(Thr 231) and active glycogen synthase kinase-3 beta (aGSK-3 beta). Neurons from APP(Dp) and sAD2 patients also accumulated large RAB5-positive early endosomes compared to controls. Treatment of purified neurons with beta-secretase inhibitors, but not gamma-secretase inhibitors, caused significant reductions in phospho-Tau(Thr 231) and aGSK-3 beta levels. These results suggest a direct relationship between APP proteolytic processing, but not amyloid-beta, in GSK-3 beta activation and tau phosphorylation in human neurons. Additionally, we observed that neurons with the genome of one sAD patient exhibited the phenotypes RSL3 seen in familial Alzheimer’s disease samples. More generally, we demonstrate that iPSC technology

can be used to observe phenotypes relevant to Alzheimer’s disease, even though it can take decades for overt disease to manifest in patients.”
“Storage phosphor imaging may be of value for biodistribution studies of short-living radiotracers in small animals. Efficiency, sensitivity and resolution of imaging plates for short-living radioisotopes vary considerably but linear response to many radioisotopes was shown previously. However, these properties have not been compared directly Saracatinib for larger series of short-living radioisotopes, and only few Studies have directly compared data obtained from phosphor images of tissue slices with results from dissection biodistribution

studies. Therefore, we evaluated the properties of imaging plates for 11 short-living radioisotopes (F-18, P-32, Ga-67, Sr-89, Tc-99m, Y-90, In-111, I-123, I-125, I-131, and (TI)-T-201). We also evaluated the biodistribution of [I-123]FP-CIT in rat brain using both the phosphor technique and conventional dissection methods.\n\nThe imaging system showed a linear response for all tested radioisotopes over a wide range of radioactive concentrations and the efficiency, sensitivity and resolution varied greatly for the tested radioisotopes. Shielding experiments revealed the contribution of the various emission products of radioisotopes to these properties. However, quantitative biodistribution studies with radiotracers that are labeled with all tested radioisotopes, even I-123, are feasible.