OBJECTIVETo study the suppressive effect of LRRC4 gene on human glioma U251 cells and further investigate its biological functions.

METHODSH&E, DNA and AgNORs stainings were performed on LRRC4-transfected U251 cells, mock-transfected U251 cells and non-transfected U251 cells, respectively. Quantitative analysis including cell morphometry, DNA content, DNA ploidy, silver stained argyrophilic nucleolar organizer regions (AgNORs) were investigated by image analysis. Flow cytometry was employed to determine the difference of cell cycle distribution and MTT staining was used to elucidate the activity of the LRRC4-transfected U251 cells.

RESULTSThe morphological cell parameters such as area, perimeter and diameter, DNA content, chromosomal aneupoloidy, mean area of AgNORs particles and mean nucleus area of the LRRC4-transfected U251 cells were remarkably decreased compared to those of the mock-transfected and non-transfected U251 cells (P < 0.05, P < 0.01). Meanwhile, significant accumulation of cells in G(0)/G(1) phase but decrease of cells in S and G(2)/M phase, was observed in transfected U251 cells compared to those of the mock-transfected and non-transfected U251 cells (P < 0.05, P < 0.01). MTT staining showed that proliferation activity of both the mock- and non-trasfected U251 cells was significantly higher than that of the U251 cells transfected with LRRC4 gene (P < 0.01).

CONCLUSIONLRRC4 gene might be involved in tumor suppression by restraining DNA synthesis and the nucleoli organizer regions-associated proteins, keeping the cell cycles in phase G(0)/G(1) and reducing proliferation activity of the glioma cells. Morphometry combined with other techniques such as flow cytometry and MTT staining can well elucidate the biological function of novel genes.

Brain Neoplasms ; genetics ; pathology ; Chromosomes, Human, Pair 7 ; Gene Expression Regulation, Neoplastic ; Genes, Tumor Suppressor ; physiology ; Glioblastoma ; genetics ; pathology ; Humans ; Nerve Tissue Proteins ; genetics ; physiology ; Transfection ; Tumor Cells, Cultured

Objective To explore the clinical application effects of the logistics robot as innovative mode in consumables management in operating room.Methods Clinical application experiment using self-designed medical logistics robot was conducted.During single point distribution,indicators including the average time/trip of logistics robots,the error rate of transporting goods,replacing the workload of the distributor,the incidence of cost loss,the right rate of avoiding pedestrians,the right rate of avoiding obstacles,the number of being lost,and the speed of operational reaction were recorded.The time of picking(T1),the delivery time(T2),and the check time(T3) of test between logistics robot and manual operation were compared.Results Experiment results were obtained from 422 trips using logistics robot during single point distribution,and the average time for each trip was 1.75 min.one logistics robot was able to take the workload of 3 to 4 people;logistics robot avoided pedestrians for 420 times;it avoided obstacles for 414 times,it was lost for 13 times,and its speed of operational reaction was normal for 419 times;the comparison results between logistics robot and manual operation showed that T1,P＞0.05;T2 and T3,P＜ 0.01,and the distribution time using robot was less than that of manual operation.Conclusion Using logistics robot for distribution of high value consumables can shorten the time of applying consumables,operation with high distribution accuracy and information precision.

Adult ; Cytomegalovirus ; Cytomegalovirus Infections ; complications ; Drug Hypersensitivity Syndrome ; complications ; virology ; Eosinophilia ; complications ; virology ; Fatal Outcome ; Female ; Gout ; drug therapy ; Hepatitis ; complications ; virology ; Humans ; Liver ; physiopathology ; Viremia

Cytomegalovirus ; Cytomegalovirus Infections ; Drug Hypersensitivity Syndrome ; Eosinophilia ; Hepatitis ; Humans

Objective To research the correlation between the visual acuity ratio and pattern reversal visual evoked potential （PRVEP） P100 waveform amplitude ratio of both eyes. Methods Forty-seven volunteers were selected, and the visual chart visual acuity of both eyes was measured. The visual acuity ratio of the eye with poor vision to the eye with better vision was calculated by five grade notation method. The amplitudes of P100 waveforms of both eyes were recorded respectively by using black-and-white checkerboard PRVEP and chosing 1°, 15' stimulating visual angle, and the ratio of amplitudes between the two eyes was also calculated. SPSS 20.0 software was used to analyze the correlation between the visual acuity ratio and the ratio of P100 waveform amplitudes between the two eyes. Return test and linear regression analysis with the binocular ratio of P100 waveform amplitudes as the independent variable （x） and the binocular visual acuity ratio as the dependent variable （y） were made. Results There was a positive correlation between the binocular visual acuity ratio and the ratio of P100 waveform amplitudes under 15' stimulating visual angle （Pearson correlation coefficient was 0.62, P=0.000）. The fitting linear regression equation was y=0.090 x+0.846 （F=20.954, P=0.000）. There was no significant correlation between the binocular ratio of visual acuity and the binocular ratio of P100 waveform amplitudes under 1° stimulating visual angle （P>0.05）. Results of return test showed that there was no statistical significance in the difference between visual acuity estimated by equation and actual detected visual acuity. Conclusion In forensic appraisal of monocular injury, fitting linear regression equation of binocular visual acuity ratio and the binocular ratio of P100 waveform amplitudes under 15' stimulating visual angle, is helpful for visual acuity level estimation of the injured eye to some extent.
Evoked Potentials, Visual ; Eye/physiopathology* ; Humans ; Regression Analysis ; Vision, Ocular ; Visual Acuity