Superoxide counteracts low-density lipoprotein-induced human aortic smooth muscle cell proliferation

Circular RNA SMARCA5 Modulates Epithelial-Mesenchymal Transformation, Proliferation, and Metastasis of Nasopharyngeal Carcinoma Cells via microRNA-582-3p/Phosphatase and Tensin Homolog Axis

The action mechanism in which circular RNA (circ) SMARCA5 targeted nasopharyngeal carcinoma (NPC) cell proliferation, migration, invasion, and apoptosis via microRNA (miR)-582-3p/phosphatase and tensin homolog (PTEN) axis was explored. The examination was performed via reverse transcription-quantitative polymerase chain reaction (RT-qPCR), discovering that circSMARCA5 was elevated while miR-582-3p was silenced in NPC tissues and cells. E-cadherin and N-cadherin were detected. The results illustrated transfection with si-circSMARCA5 or miR-582-3p-mimic was available to repress cancer cell advancement, and E-cadherin was augmented. Transfection with pcDNA 3.1-circSMARCA5 or miR-582-3p-inhibitor was available to accelerate cancer cell advancement, and N-cadherin was augmented. MiR-582-3p-inhibitor blocked the suppression of si-circSMARCA5 on NPC. The si-PTEN blocked the malignant behavior of pcDNA 3.1-circSMARCA5 against NPC. The binding sites between circSMARCA5 and miR-582-3p and between miR-582-3p and PTEN were verified. Linear analysis results illuminated the expression pattern of circSMARCA5 was opposite to miR-582-3p, while the expression pattern of circSMARCA5 was positively associated with PTEN. In brief, the results of the research clarified circSMARCA5 modulated NPC cells' vital movement via the miR-582-3p/PTEN molecular axis.

Serum nitrosative stress levels are increased in Alzheimer disease but not in vascular dementia

The aim of this study was to investigate whether there is a difference between Alzheimer disease (AD) dementia and pure vascular dementia (VaD) in relation to nitrosative stress levels. We determined serum nitric oxide (NO), oxidized low-density lipoproteins (ox-LDL), and 3-nitrotyrosine levels (3-NT) in healthy elderly individuals (controls, n=15, mean age=73.4+/-7.9 y), AD patients (n=30; mean age=71.2+/-12.7 y) and VaD patients (n=20; mean age=75.2+/-7.5 y). Patients were under anticholinesterase drug therapy. Our results showed that serum NO and ox-LDL levels in AD patients group were significantly higher than in both controls (P<0.001 and P<0.001) and VaD patients (P<0.01 and P<0.001). However, no significant differences in plasma NO and ox-LDL levels were found between VaD and controls. Our study did not reveal significant differences in plasma 3-NT values of dementia patients when compared with controls. There was a significant negative correlation between Mini-Mental State Examination score and serum NO levels in dementia patients (r=-0.349, P<0.01). Serum NO levels were also positively correlated with serum ox-LDL levels (r=0.358, P<0.01). In conclusion, elevation in serum levels of NO was present in probable AD patients but not in VaD patients, and this seems to be related to both ox-LDL levels and cognitive status.