However, the broad application of nanomaterials has also produced concern for nanoparticle toxicity due to increased exposure from large-scale Q-VD-Oph concentration industry production. This study was conducted to investigate the potential neurotoxicity of manganese (Mn),
silver (Ag), and copper (Cu) nanoparticles using the dopaminergic neuronal cell line, PC12. Selective genes associated with the dopaminergic system were investigated for expression changes and their correlation with dopamine depletion. PC12 cells were treated with 10 mu g/ml Mn-40 nm, Ag-15 nm, or Cu-90 nm nanoparticles for 24 h. Cu-90 nanoparticles induced dopamine depletion in PC12 cells, which is similar to the effect induced by Mn-40 shown in a previous study. The expression of 11 genes associated with
the dopaminergic system was examined using real-time RT-PCR. The expression of Txnrd1 was up-regulated after the Cu-90 treatment and the expression of Gpx1 was down-regulated after Ag-15 or Cu-90 treatment. These alterations are consistent with the oxidative stress induced by metal Fosbretabulin purchase nanoparticles. Mn-40 induced a down-regulation of the expression of Th; Cu-90 induced an up-regulation of the expression of Maoa. This indicates that besides the oxidation mechanism, enzymatic alterations may also play important roles in the induced dopamine depletion. Mn-40 also induced a down-regulation of the expression of Park2; while the expression of Snca was up-regulated after Mn-40 or Cu-90 treatment. These data suggest that Mn and Cu nanoparticles-induced dopaminergic neurotoxicity may share some common mechanisms associated with neurodegeneration. Published by Elsevier Inc.”
“Objective: In active infective endocarditis the need for operating simultaneously on the aortic and mitral valves is frequent. There are no studies in the literature documenting long-term outcomes of double valve surgery
for active endocarditis.
Methods: Ninety patients underwent double valve surgery for active endocarditis over a 26-year period (mean age, 53 +/- 16 years; 71% male patients). Prosthetic endocarditis was seen in 32 patients. Staphylococcus species was isolated in 29%. Forty-six (51%) patients had abscesses. Surgical intervention consisted of valve repair or replacement with limited infection or radical resection, patch reconstruction, and valve replacement for abscesses. Mean follow-up was 5.9 +/- new 4.7 years (range, 0-18 years) and was complete.
Results: There were 14 (15.6%) in-hospital deaths and 29 (32.2%) late deaths. Overall survival at 5, 7, and 10 years was 68% +/- 5%, 59% +/- 6%, and 49% +/- 6%, respectively, and was reduced in those undergoing operations for prosthetic compared with native endocarditis (7-year survival, 39% +/- 9% vs 71% +/- 7%; P < .001). Freedom from recurrent endocarditis was 84% +/- 5% at 10 years. Freedom from reoperation was 91% +/- 4% at 10 years. Event-free survival at 7 and 10 years was 60% +/- 6% and 47% +/- 7%, respectively.