ABSTRACT
Conjugated polymer hybrid nanoparticles (NPs) loaded with both indocyanine green (ICG) and 1,3-diphenylisobenzofuran (DPBF) are described. The NPs are dually functional in that ICG acts as the photosensitizer, and DPBF as a probe for singlet oxygen (1O2 probe). The nanoparticle core consists of the energy donating host poly(9,9-dioctylfluorenyl-2,7-diyl)-co-(2,5-p-xylene) (PFP). The polymer is doped with the energy acceptor DPBF. Ratiometric fluorometric detection of singlet oxygen is accomplished by measurement of fluorescence at wavelengths of 415 and 458 nm. In addition, the shell of the positively charged polymeric nanoparticles was modified, via electrostatic interaction, with negatively charged PDT drugs ICG. The integrated nanoparticles of type ICG-DPBF-PFP display effective photodynamic performance under 808-nm laser irradiation. The 1O2 sensing behaviors of samples are evaluated based on the ratiometric fluorescent responses produced by DPBF and PFP. 1O2 can be fluorimetically sensed with a detection limit of 28 µM. The multifunctional nanoprobes exhibit effortless cellular uptake, superior photodynamic activity and a rapid ratiometric response to 1O2. Graphical abstractSchematic of a dual-functional nanoplatform for photodynamic therapy (PDT) and singlet oxygen (1O2) feedback. It offers a new strategy for self-monitoring photodynamic ablation. FRET: fluorescence resonance energy transfer. Indocyanine green is attached in the shell of nanoparticles, and 1,3-diphenylisobenzofuran is doped into the energy donating host conjugated polymer.
Subject(s)
Benzofurans/chemistry , Indocyanine Green/chemistry , Nanoparticles/chemistry , Photosensitizing Agents/chemistry , Polylysine/chemistry , Singlet Oxygen/analysis , Benzofurans/toxicity , Fluorescence Resonance Energy Transfer , Hep G2 Cells , Humans , Indocyanine Green/radiation effects , Indocyanine Green/toxicity , Infrared Rays , Limit of Detection , Nanoparticles/toxicity , Photochemotherapy , Photosensitizing Agents/radiation effects , Photosensitizing Agents/toxicity , Polylysine/toxicity , Singlet Oxygen/chemistryABSTRACT
Objective: To analyse the composition of hospitalization childbirth costs and its influencing factors, which provides theory basis on reasonable control of rapid growth of hospitalization childbirth costs. Methods: With the method of stratified random sampling, 12 secondary and tertiary hospitals were chosen in Shanghai. According to the hospitalization number, the maternal disease cases delivering from Jan. 1, 2016 to Jun. 30, 2016 were randomly selected. The basic information and the cost of hospitalization were collected, and the database was established. Descriptive statistics, z test, non-parametric test and multiple linear stepwise regression analysis were performed by SPSS 20.0. Results: The cost of hospital delivery per capita in Shanghai from Jan. to Jun. 2016 was 7 826.39 yuan, of which the cost of bed, inspection, operation and western medicine accounted for the highest proportion of the expenses (17%, 16%, 15% and 15%, respectively). Maternal hospitalization cost univariate analysis showed that the effect of age, occupation, payment, pregnancy complications, modes of delivery, length of stay, prenatal and postnatal pathological condition on hospitalization cost were statistically significant. A multifactorial study on the cost of hospitalization showed that the delivery mode, length of stay, prenatal and postnatal pathological pathological condition, age and pregnancy complications were the main influencing factors. Conclusion: The hospitalization cost of cesarean section is significantly higher than that of vaginal delivery, the hospital cost structure of these two modes of delivery is different, and the reduction of cesarean section rate is of great significance. It is necessary to optimize the hospital cost structure via controlling the cost of western medicine, operation, and inspection.
ABSTRACT
Objective·To analyse the composition of hospitalization childbirth costs and its influencing factors, which provides theory basis on reasonable control of rapid growth of hospitalization childbirth costs. Methods·With the method of stratified random sampling, 12 secondary and tertiary hospitals were chosen in Shanghai. According to the hospitalization number, the maternal disease cases delivering from Jan. 1, 2016 to Jun. 30, 2016 were randomly selected. The basic information and the cost of hospitalization were collected, and the database was established. Descriptive statistics, z test, non-parametric test and multiple linear stepwise regression analysis were performed by SPSS 20.0. Results·The cost of hospital delivery per capita in Shanghai from Jan. to Jun. 2016 was 7 826.39 yuan, of which the cost of bed, inspection, operation and western medicine accounted for the highest proportion of the expenses (17%, 16%, 15% and 15%, respectively). Maternal hospitalization cost univariate analysis showed that the effect of age, occupation, payment, pregnancy complications, modes of delivery, length of stay, prenatal and postnatal pathological condition on hospitalization cost were statistically significant. A multifactorial study on the cost of hospitalization showed that the delivery mode, length of stay, prenatal and postnatal pathological pathological condition, age and pregnancy complications were the main influencing factors. Conclusion·The hospitalization cost of cesarean section is significantly higher than that of vaginal delivery, the hospital cost structure of these two modes of delivery is different, and the reduction of cesarean section rate is of great significance.It is necessary to optimize the hospital cost structure via controlling the cost of western medicine,operation, and inspection.
