Human plasma protein corona decreases the toxicity of pillar-layer metal organic framework.

This scenario was designed to investigate the protein corona pattern on the pillar-layer surface of a Cu-based metal-organic framework (MOF) in human plasma. The [Cu(L)(L/)].1.3DMA (MOF-1) {L = 4, 4/-bipyridine and L/ = 5-aminoisophthalic acid}, was synthesized through the sonochemical irradiation approach as well as characterized by various techniques like scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray powder diffraction and single-crystal X-ray diffraction. The space group was determined to be an orthorhombic space group (Pbam) by single-crystal X-ray diffraction. Single-crystal X-ray analyses on MOF-1 showed that Cu+2 ion was 6-coordinated. Besides, to study and clarify interactions between MOFs and biological milieu, human whole blood plasma was selected as a model. Fluorescence spectroscopy and SDS-PAGE techniques were employed to explore quantitative and qualitative in situ characterization of protein corona as well. Furthermore, cell viability in a cancerous cell lines was evaluated by MTT assay in the presence and absence of the corona. The results from SDS-PAGE illustrated that the most adsorbed quantity among plasma proteins belongs to fibrinogen (α, ß and γ chains), and this protein showed the maximum frequency on the MOF-1s surface, so the possible interactions of MOF-1s with fibrinogen also studied using fluorescence spectroscopy and corresponding data were plotted. According to the obtained data from MTT assay, these structures have concentration-dependent toxicity. In brief, based on the obtained data in the current study, the designed MOF can be introduced as a new desirable carrier for drug/gen delivery after further prerequisite assessments.

Examining the mediating role of perceived stress in the relationship between mindfulness and quality of life and mental health: testing the mindfulness stress buffering model.

Background and objectives: Many studies show that mindfulness can improve quality of life and mental health as well as reduce psychological distress; however, the mechanisms of these effects remain unknown. The mindfulness stress buffering model provides a model for explaining the effects of mindfulness on health outcomes through the mechanism of reducing perceived stress. Therefore, we investigated the mediating role of perceived stress in the relationship between mindfulness and quality of life and mental health.Methods/Design: Three hundred and fifteen soldiers completed the Mindful Attention Awareness scale, Perceived Stress Scale, WHO Quality of Life Assessment, and General Health Questionnaire. Structural equation modeling using bootstrap methods was employed to analyze the data.Results: Results showed that perceived stress partially mediated the relationship between mindfulness and quality of life, and that perceived stress fully mediated the relationship between mindfulness and mental health.Conclusions: Mindfulness yields beneficial effects in improving individuals' quality of life and improving mental health through reducing perceived stress.