Objective To study the leukocyte adhesion molecules in the pathogrnesis of ALI and ARDS.Methods The positive expression rates of CD11a、CD11b and CD18 in peripheral blood were quantitatively analyzed by flow cytometry using monoclonal antibodies in 26 cases of ALI,18cases of ARDS and 15 healthy controls.Results The expression rates of CD11a、CD11b and CD18 in polymorphonuclear neutrophils and monocytes from the ALI group and ARDS group were much higher than those in the control group(P

Objective To sum up the therapeutic experiences and to analyze the causes of multiple organ dysfunction syndrome (MODS) occurred in a patient who subjected to an accidental 60 Co exposure. Methods The patient was diagnosed as MODS by clinical manifestation, the auxiliary examinations and pathologic autopsy. In therapeutic aspects, intensive care, ventilator-assisted breathing, anti-infection, nutritional support treatment and protection management of important organs were given. Results After a successful transplantation of HLA-identical allogeneic peripheral blood stem cell, the complaints of MODS emerged repeatedly as fever, lung infection, respiratory failure, cardiac arrhythmia, circulatory failure, hepatic injury, decreased urine output and paralytic ileus. At last, the patient died of multi-organ failure 75 days after exposure to radiation. The results of auxiliary examinations showed enlargement of heart and cardiac arrhythmia. Biochemical examination also indicated the increased hyper-sensitive C-reactive protein. The results of pathologic autopsy indicated the existence of fungous infections in whole body, pulmonary fibrosis, myocardium degeneration and necrosis and radiation enteritis. In addition, congestive hepatopathy, renal hemorrhage and intracerebral hemorrhage were also found in the examination. Conclusion Some special clinical features were found in this case, and the cause of MODS is mainly related to radiation injury of important organs, low level of immunity and infection. So the measures of anti-infection and protective treatment of multiple organs should be taken. The key and difficulty for preventing such a kind of MODS might be to improve the patient's immunity and to help the tissue reparation after radiation injury.

Objective To observe the effects of early pulse therapy with large dose of methylprednisolone associated with cyclosporine A on mortality and incidence of pulmonary fibrosis in the patients with peroral paraquat poisoning.Methods Initial pulse therapy with large dose of methylprednisolone associated with cyclosporine A was given in early period,in addition to regular gastric lavage and hemoperfusion,after acute peroral paraquat poisoning in 38 patients.The indexes of arterial blood gas analysis,findings of lung CT,and the function of kidney and liver were all monitored periodically.At the same time,the data of mortality and incidence of pulmonary fibrosis of the patients with peroral paraquat poisoning were statistically analyzed.Results 13 of 38 patients died,the mortality was 34.2%.Among the dead,12 patients died of multiple organ failure within 1 week after paraquat poisoning,and the remaining one died of pulmonary fibrosis.During hospitalization of the other 25 patients who survived,blood oxygenation index declined in different degrees in 18 cases,the thoracic computed tomography showed interstitial changes in the lung in 17 cases,and dysfunction of more than two organs(lung,liver and kidney)was found in 13 cases.Conclusion The pulse therapy of large dose of methylprednisolone associated with cyclosporine A given in early period may markedly improve the prognosis of patients with acute peroral paraquat poisoning.But a large sample with randomized double blind study is needed in order to further evaluate the clinical efficacy.

BACKGROUND: Herterologous antigen has strong immunogenicity and easily induces immunological response. Introduction of herterologous antigen into tumor may induce a serial of immunological reactions in the tumor and may reverse the immunosuppression of tumor microenvironment to treat tumor.OBJECTIVE: To evaluate the antitumor efficacy of intratumoral injection of human erythrocyte membrane antigens in micebearing S180 sarcoma.METHODS: Kunming mice bearing S180 sarcoma model were established and treated with 5 g/L human erythrocyte membrane antigens suspension or normal saline for five days. Tumor volume was calculated before the first injection and 3, 7, and 14 days after the first injection. In addition, the tumor cells in combination with human erythrocyte membrane antigens group, the njectionof saline group (the control group), and the injection of human erythrocyte membrane antigens or saline group (pre-immunized by suspension of human erythrocyte of blood group type A). Another 60 mice bearing S180 sarcoma were established and subjected to the above pre-immunization and injection of saline or human erythrocyte membrane antigens. Six mice selected from each group were sacrificed 14 days after the first injection, and tumors were weighed, followed by histological examination. Survival of remainders in each group was observed.RESULTS AND CONCLUSION: Tumor volumes in each group increased gradually. Tumor volumes in the human erythrocyte membrane antigens injection group, the tumor cells in combination with human erythrocyte membrane antigens group, and the human erythrocyte membrane antigens injection group (immunized) were smaller than the control group, Intratumoral injection of human erythrocyte membrane antigens significantly reduced tumor weights. Tumor necrosis, infiltration of inflammatory cells such as lymphocytes were observed in tumor tissues section examination following the intratumoral injection of human erythrocyte membrane antigens. The mouse survival time showed no statistical difference among different groups. Intratumoral injection of heteroloaous ervthrocvte membrane antiaens can inhibit tumor arowth of S180 sarcoma bearina mice.

Objective To study the hemodynamic changes of rabbit VX2 liver tumors before and after ethanol injection by perfusion imaging of MSCT and investigate the correlation between perfusion parameters and microvessel density (MVD). Methods All of 15 Japanese long-ear white rabbits were divided into control group and experiment group. All rabbits were inoculated with VX2 liver tumor. Perfusion imaging of MSCT scans were conducted in 5 rabbits in the control group on the 14 th day after VX2 tumor inoculation, and the borders of the tumors were stained with immunohistochemical stains, and MVD was measured by anti-CD34. Perfusion imaging of MSCT scans were conducted in all 10 rabbits in the experiment group on the 14 th day after VX2 tumor inoculation. Then absolute alcohol was injected into the tumors by laparotomy. CT scans were conducted 3 and 30 days after absolute alcohol injection, and the borders of the tumors were stained immunohistochemically, and MVD was measured by anti-CD34. The differences of perfusion parameters such as hepatic blood ( BF), hepatic blood volume (BV), mean transit time ( MTT),permeability of capillary vessel surface (PS), and hepatic arterial fraction (HAF), hepatic arterial perfusion (HAP) were compared to evaluate the liver hemodynamic changes. Statistical repeated measurement t test, correlation analysis were performed. Results BF of border of the tumor between pretreatment, 3 days after ethanol injection and 30 days after ethanol injection were ( 280. 62 ± 59. 87 ),(322.03 ± 86. 94 ), ( 177.05 ± 75.96) ml · min -1; HAF were 0. 59 ± 0. 08, 0. 89 ± 0. 12, 0. 23 ± 0. 07;HAP were ( 189. 26 ± 25.46), ( 251.57 ± 31.78 ), (40. 90 ± 5.17 ) ml · min - 1 · ml - 1. HAP increased significantly after ethanol injection 3 days ( P ＜ 0. 05 ); BF, HAF, HAP decreased significantly 30 days after ethanol injection compared with 3 days after ethanol injection ( P ＜ 0. 05 ); BF, HAF, HAP decreased significantly 30 days after ethanol injection compared with pre-treatment ( P ＜ 0. 05 ). It showed positive correlation between BF, PS, HAF, HAP and MVD (r=0. 916, 0. 726, 0. 870, 0. 889; P ＜0. 05). MVD decreased significantly compared with the control group (43.9 ± 4. 0)/HP 30 days after ethanol injection (21.8±3.5)/HP (t = 12.271, P ＜0.05). Conclusion Perfusion imaging of MSCT can detect the hemodynamic changes in rabbit VX2 liver tumors, and also in tumors before and after ethanol injection. CT perfusion can take the place of MVD to evaluate the tumor angiogenesis.

AIM:To study the effects of colquhounia root tablet on the expression of adhesion molecule in acute lung injury of rats. METHODS: The rats were divided into 3 groups: ALI group, colquhounia root tablet+ALI group and control group . ALI animal model was performed by treatment with oleic acid. The positive expression rates of CD11a, CD11b and CD18 in polymorphonuclear neutrophils and monocytes were analyzed by flow cytometry. ICAM-1 expression in lung tissue was determined by immunohistochemistry, histopathological examination and biological markers were measured from lung specimens.RESULTS: Colquhounia root tablet decreased the expression of CD11a, CD11b and CD18 in polymorphonuclear neutrophils and monocytes, and ICAM-1 in lung tissue (P

Objective To prepare a new type of chitosans nanoparticles(PEG/CS-EPI NPs),which contains epirubicin and modified by PEG.Furthermore,to investigate the anticancer activity of the NPs in vitro and in vivo.Methods The ionic gelation technique was employed to prepare the PEG/CS-EPI NPs and CS-EPI NPs.The particle size and shape were illustrated respectively by laser scattering and transmission electron microscopy.The proliferation of nasopharyngeal carcinoma cells was detected by MTT assay;The mouse model of implantation murine sarcoma cells(S-180) was applied to evaluate the anticancer effectiveness of PEG/CS-EPI NPs and CS-EPI NPs in vivo.Results The PEG modified CS NPs were discrete and uniform spheres with average diameter of 322.1 nm.The rate of drug loading and encapsulation is 13% and 74% respectively.The results of the anticancer tests showed a sustained cytotoxicity of loading drug NPs on nasopharyngeal carcinoma cells in vitro and the stealth nanoparticles was more powerful than ordinary nanoparticles on the inhibitory potency in vivo.Conclusion Stealth chitosan nanoparticles as compared with ordinary chitosan nanoparticles seems to be a potential candidate of chemotherapy drug carriers.

ObjectiveTo explore the endocytic pathway of TAT-LHRH modified chitosan/DNA nanoparticle (TLCDN) that exhibits high transfection efficiency and targeting to HepG2.MethodsPlasmid DNA was labeled with fluorescein,and the resulting fluorescent DNA was complexed with chitosan or TAT-LHRH modified chitosan to form chitosan/DNA nanoparticle (CDN) and TLCDN by the complex coacervation method.Internalization of TLCDN or CDN by HepG2 cells were measured in the presence of three kinds of inhibitors of endocytic pathway,Chlorpromazine,Filipin or Dynasore,using High-Content Analyzer to collect and analyze the data.ResultsChlorpromazine led to more decreased uptake of CDN than that of TLCDN,although not statistically significant.Filipin demonstrated significant inhibitory effect on the uptake of TLCDN while promoted the uptake of CDN.Dynasore resulted in a similar decrease in the uptake of both nanoprticles.ConclusionIt was demonstrated that CDN was taken up by HepG2 cells mainly through the clathrin-dependent endocytic pathway and TLCDN was more likely to be internalized by HepG2 cells through the caveolin-mediated endocytic pathway although the clathrin-dependent endocytic pathway was also involved.

Objective To prepare stable aqueous dispersions of chitosan/multi-walled carbon nanotubes (CS/MWCNTs) composites,and observe the effects of CS/MWCNTs on the growth of human umbilical vein endothelial cells (HUVEC).Methods CS/MWCNTs composites were prepared by electrostatic interactions between negatively charged MWCNTs and positively charged low-molecular-weight CS.The prepared CS/MWCNTs were characterized by transmission electron microscopy and Zetasizer nano-analyser.The cellular uptake of the fluorescently labeled CS/MWCNTs was observed by laser confocal microscopy after incubating with HUVEC for 24 h at different concentrations.In vitro cytotoxicity and cellular reactive oxygen were also detected.Results When the mass ratio of low-molecular-weight CS to MWCNTs was equal or greater than 10∶1,the CS/MWCNTs can be stabilized in solution.Cellular uptake experiments showed that the CS/MWCNTs could enter into the cells and locate mainly in the cytoplasm.Cytotoxicity study showed that the CS/MWCNTs composites was less toxic than MWCNTs alone at high concentration (10 and 20 μg/ml).However,there was no significant differencein the level of cellular reactive oxygen between the two groups (P＜0.05).Conclusions CS/MWCNTs composites showed low cytotoxicity and high stability,which would be a promising carrier for drug delivery.