Objective To establish a method of PKH26 labeled bone marrow-derived endothelial progenitor cells (EPCs) into rats with liver fibrosis and observe cell immigration and differentiation in the liver after transplantation.Methods Bone marrow-derived EPCs were isolated and cultured from rats with liver fibrosis,and then labeled with PKH26 in vitro.Under the scanning confocal microscopy and flow cytometry,PKH26 fluorescent labeling rate and cell survival rate were measured.EPCs of PKH26 fluorescent labeling were transplanted into rats with liver fibrosis via the tail vein,and the migration situation was observed in the liver.Endothelial cell markers CD31 and von willebrand factor (vWF) were detected by using immunofluorescence.Results The PKH26-labeled EPCs appeared red fluorescence and the labeling rate was 96.65 ％.As compared with unlabeled cells,the labeled cells grew well,and had no significant changes in the growth curve.After transplantation into the liver of rats,the PKH26 labeled cells were mainly distributed in blood vessel endothelium along fibers and hepatic sinusoids in hepatic lobule.Endothelial cell-specific antigens such as CD31 and vWF could be detected along the vascular walls.Conclusion PKH26 could be used to label and track EPCs in the liver of rats with liver fibrosis in vitro.The PKH26-labeled cells may migrate to the surrounding of the hepatic vessels and differentiate into mature endothelial cells.

OBJECTIVETo observe therapeutic effects of bird-pecking moxibustion in children of hand, foot and mouth disease, and to analyze the mechanism.

METHODSSeventy-five children of hand, foot and mouth disease were randomly divided into 3 groups, a combined moxibustion and medicine group (n = 22), a Chinese medicine group (n = 29), and a western medicine group (n = 24). The combined moxibustion and medicine group was treated with bird-pecking moxibustion combined with routine western medicine, the Chinese medicine group with oral administration of Chinese medicine and routine western medical therapy, and the western medicine group with routine western medicine. After treatment of 7 days, the therapeutic effects on skin rash, oral herpes, constipation or loose stool, dyspepsia and anorexia, etc. were comprehensively assessed, and their therapeutic effects were compared.

RESULTSThe total effective rate was 95.5% in the combined moxibustion and medicine group, 86.2% in the Chinese medicine group, and 83.3% in the western medicine group, the former being significantly better than those of the other two groups (both P < 0.05). The combined moxibustion and medicine group was significantly better than the other two groups in the relieving time of skin rash, oral herpes, constipation or loose stool, dyspepsia and anorexia, etc. (all P < 0.05)

CONCLUSIONThe combined moxibustion and medication can effectively improve symptoms of the digestive tract, shorten duration of disease, reduce pain in the patient with hand, foot and mouth disease.

Child ; Child, Preschool ; Combined Modality Therapy ; Drug Therapy ; methods ; Drugs, Chinese Herbal ; administration & dosage ; therapeutic use ; Female ; Hand, Foot and Mouth Disease ; pathology ; therapy ; Humans ; Infant ; Male ; Moxibustion ; methods ; Treatment Outcome

Dissimilatory Metal Reduction Bacteria play an important role in the anaerobic environment. This kind of bacteria gains energy by coupling the oxidation of organic acid or sugars to the reduction of metal oxides. The graphite electrode rode can also be used as the final electron acceptor due to its similarity to solid metal oxides. Based on this biological mechanism, Dissimilatory Metal Reduction Bacteria Rhodoferaxferrireducens was used to construct a suit of microbial fuel cells with sugars as fuel, and the process and mechanism of electricity generation was studied. Rhodoferax ferrireducens was inoculated into the anode chamber in which a graphite electrode served as the final electron acceptor and glucose as the sole electron donor. It was showed that current density was up to 158mA/m2 with the resistance of 510omega at the normal temperature (platform voltage was around 0.46V, the effectual electrode surface was 57cm2). Following 20days' growth a large amount of bacteria cells attached to the electrode surface had been observed through the SEM images. The plandtonic cell protein concentration was 140mg/L and the attached biomass of electrode surface was 1180mg/m2 determined by the Bradford method, which indicated quite a few bacteria attached to the electrode. By analyzing the voltage value measured by the data acquisition system, it was proved that microbial electricity generation attributed mainly to the electrochemically and biologically active cells attached to the electrode, while the planktonic cells had no ability to catalyze electricity generation and almost had not electrochemically and biologically active. Furthermore, this kind of microbial fuel cells exhibited a good electrochemical cycle property and proved to be efficient in biomass utilization and energy restore since other sugars like fructose, sucrose, even xylose, could be oxidized and finally decomposed. Vast waste biomass in the form of carbohydrates is discarded in the environment. Not only is contamination of the environment caused by the discarded biomass, but also abundant energy stored in the biomass is drained away in vain. The sugar-based microbial fuel cells constructed by Rhodoferax ferrireducens could effectively transform the energy stored in sugars into electricity. Meanwhile, the microbial fuel cells presented in this paper, which could work cleanly at normal temperature with a good cycle property, showed a promising future application in this field.
Bioelectric Energy Sources ; microbiology ; Comamonadaceae ; metabolism ; Electricity ; Electron Transport ; Equipment Failure ; Glucose ; metabolism ; Oxidation-Reduction

OBJECTIVETo understand the pollution rates of vibrio cholera (V. cholera) in different seafood, aquatic products and their circulatory processes, so as to help making measures for cholera control and prevention.

METHODSDifferent seafood, aquatic products and breed water specimen collected from 12 provinces of China were tested from July to September in 2005.

RESULTA total of 12 104 samples of seafood and aquatic products were tested and the average pollution rate of vibrio cholera was 0.52%. The positive isolate rate of turtle sample (1.72%) was the highest among all samples. The second higher isolated rate was 1.14% in water specimen of turtle breed pool. The positive rate of bullfrog was 0.50%. The percentage of toxin strains was 47.54% and 79.31% of them were isolated from turtle and water samples of turtle breed pool. The important sector of the pollution of vibrio cholera was in turtle breed pool (2.38%).

CONCLUSIONThe average pollution rate of vibrio cholera in seafood and aquatic products in 12 provinces of China was low. It should be very necessary to supervise the sanitation in turtle breed for controlling and preventing the vibrio cholera.

Animals ; China ; Female ; Fishes ; microbiology ; Food Contamination ; analysis ; prevention & control ; statistics & numerical data ; Male ; Seafood ; microbiology ; Seawater ; analysis ; Turtles ; microbiology ; Vibrio cholerae ; isolation & purification

Because of irregular shapes of Chinese herbal pieces, we simplified the previously deduced general extraction kinetic model for TCMs, and integrated particle diameters of Chinese herbs that had been hard to be determined in the final parameter "a". The reduction of the direct determination of particle diameters of Chinese herbs was conducive to increase the accuracy of the model, expand the application scope of the model, and get closer to the actual production conditions. Finally, a simplified model was established, with its corresponding experimental methods and data processing methods determined. With total flavonoids in Scutellariae Radix as the determination index, we conducted a study on the adaptability of total flavonoids extracted from Scutellariae Radix with the water decoction method in the model. The results showed a good linear correlation among the natural logarithm value of the mass concentration of total flavonoids in Scutellariae Radix, the time and the changes in the natural logarithm of solvent multiple. Through calculating and fitting, efforts were made to establish the kinetic model of extracting total flavonoids from Scutellariae Radix with the water decoction method, and verify the model, with a good degree of fitting and deviation within the range of the industrial production requirements. This indicated that the model established by the method has a good adaptability.
Chemical Fractionation ; methods ; Drugs, Chinese Herbal ; isolation & purification ; Flavonoids ; isolation & purification ; Kinetics ; Models, Theoretical ; Scutellaria baicalensis ; chemistry ; Water ; chemistry

OBJECTIVE: To develop the visual uroflow scale (VUS), analyze the relationship of VUS score and index of free uroflowmetry, assess urination function preliminarily and improve the work efficiency in the clinic. METHODS: Male lower urinary tract symptoms (LUTS) patients, who attended the Department of Urology in Peking University People's Hospital from March 2016 to March 2017, were assessed for their urination function according to the Visual Uroflow Scale without help from clinicians before undertaking a free uroflowmetry test. And afterwards, a free uroflowmetry was undertaken, and variables including maximal flow rate (Qmax), the average flow rate (Qave) and voiding volume (VV) was obtained. During the study, 124 cases were collected and 53 cases met the inclusion and exclusion criteria and were included in the study cohort. The Spearman correlation analysis was used for analyzing the correlation of VUS scores with free uroflowmetry variables and age. The validity of VUS was evaluated. RESULTS: Most of the patients could choose the very figure matched with self-condition by first instinct without any help from the clinician. The data were analyzed by Spearman correlation analysis. In the present study, voiding time was positively correlated with the VUS score (correlation coefficient, 0.62, P < 0.05). In the present cohort, the patients chose the third and fourth figures to take longer time to urinate, implying worse LUTS situation. Flow time and VUS scores were positively correlated (correlation coefficient, 0.61, P < 0.05). The patients with higher VUS scores would spend more time on urinate, no matter how long urinary hesitation was. Both Qmax and Qave were negatively correlated with the VUS score (correlation coefficient －0.54, －0.62, P < 0.05). The study illustrated that the VUS score suggested that the Qmax basically and further reflected the urination function. And its relationship to age revealed the decreased urination function of aging male, which had reached a consensus. CONCLUSION Development of VUS has helped the clinician assess the urination function preliminarily at the first time. Patients are assessed for a VUS score before getting surgery or receiving the drug for treatment, and can be re-assessed after. The VUS score can provide an objective quantitative basis to evaluate the treatment efficacy. In addition, considering that it is convenient, timesaving and easy to understand, the VUS is available for follow-up.
Cohort Studies ; Humans ; Lower Urinary Tract Symptoms ; Male ; Urination ; Urodynamics

Objective To investigate the effects of mercury on T lymphocytes and serum immune indexes of workers with Methods occupational mercury exposure. A total of 45 workers with occupational mercury exposure were selected as the ， mercury exposure group and 47 workers without occupational mercury exposure were selected as the control group using the judgment sampling method. Cold atomic absorption spectrometry was used to detect the urinary mercury level of the two groups. （ ） +， + +， + + - + Flow cytometry was used to detect the proportion of cluster of differentiation CD 3 CD3CD4 CD3CD8 and CD3CD19 ， - （ - ） - （ - ） cells in peripheral blood and the levels of tumor necrosis factor α TNF α and interleukin 8 IL 8 in serum. The levels of （ ） ， Results immunoglobulin Ig A IgG and IgM in serum were measured by immune nephelometry. The urinary mercury level of （ ： vs ，P ） individuals in the mercury exposed group was higher than that of the control group median 92.7 13.2 μg/g Cr <0.01 . The +， + +， - + proportion of CD3 CD3CD4 CD3CD19 cells in peripheral blood and serum IgG level in the mercury exposed group （ P ）， - - （ P ） decreased all <0.05 and the serum TNF α and IL 8 levels increased all <0.01 compared with the control group. Urinary - + mercury level was negatively correlated with the proportion of CD3CD19 cells in peripheral blood and serum IgG level in the ［ （r） ， ， P ］， study subjects Spearman correlation coefficient S were −0.21 and −0.31 respectively all <0.05 and positively - - （r ， ， P ） ， correlated with serum TNF α and IL 8 levels S were 0.36 and 0.39 respectively all <0.05 . However the urinary mercury （ P ）， +， + +， level was neither correlated with IgA and IgM levels in serum all >0.05 nor with the proportion of CD3 CD3CD4 + + （ P ） Conclusion CD3CD8 cells in peripheral blood all >0.05 . Occupational exposure to mercury can lead to abnormal ， changes in peripheral blood T lymphocyte subsets B lymphocytes and serum immune factors in workers. The mercury load of occupational mercury exposure workers may impact their immune function.

The clinical tumor therapy was greatly challenged due to the complex characteristics of tumor microenvironment, however, which also provide arena for novel therapeutic strategies. In this study, poly(2-ethyl-2-oxazoline)-poly(lactic acid)-SS-poly(β-amino ester (PEOz-PLA-SS-PBAE) triblock copolymers with pH and GSH double response were synthesized, polymer micelles were prepared by thin film hydration method for loading of silybin to improve its antitumor activity. The critical micelle concentration was determined by pyrene fluorescence method as 1.8 μg·mL^-1. The particle size was 155.30 ± 1.80 nm as determined by dynamic light scattering, with polydispersity index of 0.168 ± 0.004. The drug loading and entrapment efficiency of the micelles were determined by HPLC as (5.48 ± 0.04)% and (68.52 ± 0.48)%, respectively. The in vitro drug release profiles showed that the micelles have low pH sensitivity and high GSH responsiveness, and exhibited sustained release profiles. The good biocompatibility of the material was proved by measuring the hemolysis rate and cytotoxicity of the blank micelle. The cytotoxicity and apoptosis rate of tumor cells showed that the drug loaded PEOz-PLA-SS-PBAE micelles had significant inhibitory effect and apoptosis-inducing effect on MDA-MB-231 cells. The results of wounding healing assay and Transwell invasion test showed that the drug loaded PEOz-PLA-SS-PBAE micelles could significantly inhibit the metastasis of MDA-MB-231 cells. The PEOz-PLA-SS-PBAE drug-loaded micelles prepared in this study have good inhibitory effect on tumor growth and anti-tumor metastasis in vitro, which lays the foundation for the further application of silybin.

The industry of germ-free animals has been a hot spot in research along with the rapid development of studies on the relationship between microbiota and host diseases. Because it is pathogen?free, and the high degree of simi?larity in anatomy, physiology, pathogenesis to humans, germ?free pig is considered a clinical relevant model to be widely used in life science research. Based on the current state of research of germ?free pig cultivation at home and abroad and the experimental studies carried out in our laboratory as well, this article gives a simple discussion on germ?free technique of domestic pigs.

OBJECTIVETo investigate the effect of Lishi No.5 formula on the growth of human neuroblastoma cell line SY5Y and find out the most effective drug dose.

METHODSY5Y cells were administrated by Lishi No.5 formula in different concentration. MTT metabolic rate was measured as the cell survival rate, then the dose-effect curve was made. LDH leakage rate, axonal length and area of cell body were used as the indicators.

RESULTIn 0.125-0.75 g x L(-1) Lishi No. 5 formula could increase the cell survival rate and MTT metabolic rate, decreased LDH leakage rate, and enhance axonal length and area of cell body, compared with control group.

CONCLUSIONLishi No.5 formula has the neurotrophic effect and can induce the survival of neuron.

Cell Line, Tumor ; Cell Proliferation ; drug effects ; Cell Survival ; drug effects ; Dose-Response Relationship, Drug ; Drug Combinations ; Drugs, Chinese Herbal ; isolation & purification ; pharmacology ; Humans ; L-Lactate Dehydrogenase ; metabolism ; Neuroblastoma ; metabolism ; pathology ; Plants, Medicinal ; chemistry