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The objective of this study is to investigate the impact of the COVID-19 pandemic and stock market psychology on investor investment decisions in different business units operating in the Shandong stock market. The sample size of the study consists of 5,000 individuals from six different business units. The study used the event study statistical technique to analyze the market reaction to newly released information from the stock market perspective to assess whether the number of COVID-19 positive cases impacted it. With a Z score value of 40.345 and a P-value of 0.000, the Wilcoxon test indicated that stock prices before and after the pandemic were quite different. The test showed a positive relationship between the pandemic and the stock market. Further, the results indicated that COVID-19 and stock market psychology had a significant positive impact on investor investment decisions in cosmetic and beauty, consumer household, textiles and apparel, and consumer electronics industries; however, in the sporting and consumer appliance industries, it had an insignificant negative impact. This study serves to guide investors to make suitable changes in their stock market trading practices to counter these challenges to increase their required rate of return from their specific stock market investment. The findings have important insights for various stakeholders including governments, regulatory bodies, practitioners, academia, industry, and researchers.
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To conduct an anti-tumor research by using targeted drug-loaded cell-derived microparticles to target the tumor microenvironment and enhance NK cell killing function. In this experiment, we obtained HepG2 tumor cell-derived microparticles by physical extrusion, high speed centrifugation and filtration, modified the hepatocellular carcinoma targeting peptide SP94 on the surface of microparticles and encapsulated the TGF-ß inhibitor SB505124. Finally we validated and analyzed whether the new drug delivery system can target to tumor site and enhance the anti-tumor function of NK cells. This type of novel targeted cell-derived microparticles drug delivery system will provide a novel idea for tumor immunotherapy.
Subject(s)
Carcinoma, Hepatocellular , Cell-Derived Microparticles , Liver Neoplasms , Carcinoma, Hepatocellular/drug therapy , Cell Line, Tumor , Cell-Derived Microparticles/metabolism , Cell-Derived Microparticles/pathology , Hep G2 Cells , Humans , Liver Neoplasms/drug therapy , Liver Neoplasms/metabolism , Peptides , Pharmaceutical Preparations , Tumor MicroenvironmentABSTRACT
Hepatocellular carcinoma (HCC) is a common malignant tumor with poor prognosis and high mortality. In this study, we demonstrated a novel vaccine targeting HCC and tumor neovascular endothelial cells by fusing recombinant MHCC97H cells expressing porcine α-1,3-galactose epitopes (αGal) and endorphin extracellular domains (END) with dendritic cells (DCs) from healthy volunteers. END+/Gal+-MHCC97H/DC fusion cells induced cytotoxic T lymphocytes (CTLs) and secretion of interferon-gamma (IFN-γ). CTLs targeted cells expressing αGal and END and tumor angiogenesis. The fused cell vaccine can effectively inhibit tumor growth and prolong the survival time of human hepatoma mice, indicating the high clinical potential of this new cell based vaccine.
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Objective To investigate the 90Sr concentration levels in the monitoring areas and the control area at Ningde Nuclear Power Plant (NPP).Methods Food samples were collected from the monitoring areas in 30 km of Ningde NPP and the control area far away.The radioactive levels of 90Sr in food samples were analyzed using the chromatography with 2-(2-ethylhexyl) phosphate fast extraction method.Results In this survey,90Sr radioactive concentrations in 30 varieties of foods in 6 categories were analyzed.In the monitoring area,90Sr radioactivity concentration in the samples collected were in the range of 0.017-1.830 Bq/kg for cereals,beans and potatoes,0.021-0.318 Bq/kg for vegetables,0.007-7.690 Bq/kg for quatic products,and 0.009-0.184 Bq/kg for meats;whereas,in the control area,cereals,beans and potatoes in O.017-0.700 Bq/kg,vegetables in 0.034-0.677 Bq/kg,aquatic products in 0.038-3.360 Bq/kg,and meats in 0.019-0.054 Bq/kg.Conclusions The 90Sr radioactive concentrations in foods were far below the food standard limits in this survey.The contribution of evaluated to the public from the 90Sr in foods was neglectable.
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Objective@#To investigate the 90Sr concentration levels in the monitoring areas and the control area at Ningde Nuclear Power Plant (NPP).@*Methods@#Food samples were collected from the monitoring areas in 30 km of Ningde NPP and the control area far away. The radioactive levels of 90Sr in food samples were analyzed using the chromatography with 2-(2-ethylhexyl) phosphate fast extraction method.@*Results@#In this survey, 90Sr radioactive concentrations in 30 varieties of foods in 6 categories were analyzed. In the monitoring area, 90Sr radioactivity concentration in the samples collected were in the range of 0.017-1.830 Bq/kg for cereals, beans and potatoes, 0.021-0.318 Bq/kg for vegetables, 0.007-7.690 Bq/kg for quatic products, and 0.009-0.184 Bq/kg for meats; whereas, in the control area, cereals, beans and potatoes in 0.017-0.700 Bq/kg, vegetables in 0.034-0.677 Bq/kg, aquatic products in 0.038-3.360 Bq/kg, and meats in 0.019-0.054 Bq/kg.@*Conclusions@#The 90Sr radioactive concentrations in foods were far below the food standard limits in this survey. The contribution of evaluated to the public from the 90Sr in foods was neglectable.
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Objective To develop a novel stress fracture animal model system based on dynamic cyclic mechanical loading.Methods Ulnae and tibiae of rats were respectively fixed using differently shaped fixtures (including a fixed holder and a movable holder).The axial mechanical loading was applied via a linear actuator based on LabVIEW control program.During the loading process,a load cell and a laser displacement transducer were used to detect the force and displacement changes in the limbs,respectively.The two signals were sampled at real time by PC-based LabVIEW data acquisition program.A compressive loading test (peak force of 50 N) was conducted to examine the consistency and reliability of cyclic loads after completing the loading system.The loading system and an ElectroForce 3220 mechanical testing machine were respectively used to measure and compare the Young's modulus of a standard ultra-high molecular weight polyethylene (UHMWPE)cylinder to calibrate the loading system.Results The compressive loading test (peak force of 50 N) demonstrated that the mechanical loading system was able to apply consistent loads with controllable intensity and time.The calibration experiment indicated the accuracy of the loading system.Conclusion The novel mechanical loading device has characteristics of precision,scientificity and reliability,and it is approaching the real development situation of stress fracture,which may provide a reliable experimental base for exploring the precautionary measures of stress fracture.
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Background:Gastrointestinal dysmotility is commonly seen in individuals exposed to acute plateau hypoxia. Its pathogenic mechanism is still not clear and intervention study is rarely performed. Aims:To investigate the influence of plateau hypoxia on small intestinal motility of rats,its possible mechanism,and the intervention effect of raw Atractylodes macrocephala. Methods:Seventy Wistar rats were randomly divided into 7 groups:control group,two high altitude model groups(3 500 m and 5 000 m),trimebutine and raw Atractylodes macrocephala groups at 3 500 m or 5 000 m altitude. Rats in six experiment groups were placed in a hypobaric chamber mimicking 3 500 m or 5 000 m altitude and given trimebutine/ raw Atractylodes macrocephala/ saline intragastrically for 3 days. Then all the rats were lavaged with 2 mL ink and sacrificed 30 minutes later. The propulsion rate of ink in small intestine was measured,the pathological changes of small intestine tissue were examined,and the expression of 5-HT4 receptor was determined by immunohistochemistry. Results:Compared with control group,the propulsion rate of small intestine and immunopositive area of 5-HT4 receptor were reduced in model group at 3 500 m altitude,while those in model group at 5 000 m altitude were increased(P ﹤0. 05). Moderate-to-severe mucosal injury was observed in two model groups. In model rats treated with raw Atractylodes macrocephala,the abnormalities in small intestine propulsion and 5-HT4 receptor induced by high altitude(3 500 m and 5 000 m)returned to the control level(P ﹤ 0. 05),and the mucosal injury ameliorated simultaneously. Efficacy of raw Atractylodes macrocephala was prior to trimebutine,a positive control. Conclusions:Acute plateau hypoxia may induce small intestine dysmotility with diverse manifestations,and altitude is a crucial determinant in this process. Raw Atractylodes macrocephala can exert therapeutic effect on this dysmotility by modulating 5-HT4 receptor,and it is also effective in repairing mucosal injury.
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Objective To investigate the outcomes of unselected peripheral T cell lymphoma (PTCL) patients treated with in-tensive first-line chemotherapy with high-dose therapy followed by autologous stem cell transplantation (ASCT).Methods Here a nonrandom study was reported for 23 PTCL patients treated with first-line intensive chemotherapy followed by autologous stem cell trans-plantation and 23 PTCL patients treated with conventional chemotherapy during January in 2000 to 2011 .All patients had received E-CHOP for 6~8 cycles, and autologous stem cell transplantation group was administrated with intensive chemotherapy followed by ASCT after complete remission or partial remission .Results There was no statistically significant difference in short-term therapeutic effect between two groups( P >0.05), but the 5-year overall survival(OS) of autologous stem cell transplantation group( 58%) was higher than conventional chemotherapy group , as well as 5-year disease-free survival time (DFS) (45%in autologous stem cell transplanta-tion group, and 21%in conventional chemotherapy group ) with both statistical significance ( P <0.05).Only the incidence of Ⅳ° myelosuppression in autologous stem cell transplantation group ( 100%) was higher than that in conventional chemotherapy group ( 13%) ( P <0.01 ) .Conclusions First-line intensive chemotherapy followed by autologous stem cell transplantation for peripheral T cell lymphoma was quietly safe utility , it was better than conventional chemotherapy which would be considered as first -line method.
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Research on the effect of sleep deprivation (SD) is an approach to shedding light on the working mechanism of sleep for cognitive brain function. To explore how SD affects cognitive function, a number of measures involving psychology, brain imaging and electrophysiology, have been adopted in this area. Research groups from domestic and verseas have focused on many aspects of cognitive science and have acquired initial results, but uniform conclusion has not been made because of mixed factors. Starting from the mechanism of SD, this paper summarizes the progress in the search of effect of SD, including the neurophysiologic change by brain imaging and the use of EEG for evaluating the decline of cognitive function, and then analyzes the main influential factors and orientation of future research in this area.
