Objective To evaluate the performance of the Sysmex XE-5000 analyzer for analyzing atypical lymphocytes ,baso-philic granulocytes and their abnormalities warnings .Methods A total of 197 specimens with both atypical lymphocytes and baso-philic granulocytes warnings and 914 specimens with single warning of atypical lymphocytes indicated by Sysmex-5000 blood cell analyzer were collected and inspected by microscope simultaneously .Results Using microscopic examination as a standard ,baso-philic granulocytes within the normal range ,the coincidence rate of samples with both atypical lymphocytes and basophilic granulo-cytes warnings was 64 .9% ,while the coincidence rate of samples with single warning of atypical lymphocytes was 72 .5% .The for-mer was significantly lower than the latter(P<0 .05) .Conclusion When Sysmex XE-5000 indicates atypical lymphocytes and baso-philic granulocytes simultaneously ,there is interference between each other .It should be combined with microscopic examination in order to reduce the probability of missed diagnosis and misdiagnosis .

Background As a main suppressing neurotransmitter in visual system,gamma-aminobutyric acid (GABA) participates in the transmission and regulation of visual information.GABA and dopamine (DA) coexist in the visual cortex,and their mutual effects should be clarified.Objective This study was to investigate the effect of DA on GABA-activated current in vitro in cultured visual cortical neurons of rats.Methods Neutrons from visual cortex of clean neonatal rats were isolated and cultured by explant culture method.The neutrons cultured for 11 -to 14- days were collected for the record of whole cell currents of GABA-A (IGABA) channels in vitro using patch clamp technique.The DA solution (100mmol/L),SKF38393 (10mmol/L) solution and quinpirole solution(10mmol/L) were prepared with double distilled water and then the extracellular fluid was added to different concentrations.The IGABA changing rate under the action of SKF38393+SCH23390,SKF38393+Quinpirole for different time was recorded respectively and compared with that of action of DA,SKF38393,SCH23390,Quinpirole.The IGABA activated by extracellular fluid along served as control.Results The IGABA was significantly attenuated after activated by ≥10μmol/L of DA or SKF38393 separately in comparison to that of extracellular fluid action (P＜0.05).In various time of action,there were obviously differences in IGABA between DA or SKF38393 action and extracellular fluid (P＜0.05,P＜0.01).No evident change in IGABA changing rate was found after only SCH23390 action in comparison with extracellular cells (P＜0.05).However,after combination of SCH23390 and SKF38393,IGABA changing rate reduced by 19.49%.No significant differences were found in the changing rates of IGABA among different concentrations of quinpirole action groups compared with extracellular fluid group (P＞0.05);while when quinpirole was combined with SKF38393,the IGABA was elevated in comparison with only SKF38393 action group (P＜0.05).Conclusion Dopamine participates in the transfer and regulation of visual information through suppressing GABA-activated currents from neutrons of visual cortex at time-dependent manner in vitro.

Abstract: Objective　To explore the relationship between body mass index (BMI), waist-hip ratio (WHR) and the risk of gout in Urumqi. Methods　A total of 516 male patients with gout in a third-class hospital in Urumqi from 2015 to 2019 were randomly selected as the gout group and 516 male healthy subjects in the same hospital as the control group. The relevant blood biochemical indexes were examined and analyzed. Blood pressure, waist circumference and hip circumference were measured. Body mass index and waist-to-hip ratio were calculated. Logistic regression model was used to analyze the relationship between overweight / obesity, waist-to-hip ratio and the risk of gout. The test level is α = 0.05. Results　Uric acid, glucose, urea nitrogen, creatinine, triglyceride, low-density lipoprotein, systolic blood pressure, weight and waist circumference in gout group were higher than those in control group, and the differences were statistically significant (P<0.05); There were no significant differences in age, height and diastolic blood pressure between the two groups (P<0.05). There was a positive correlation between BMI and WHR and the occurrence of gout (r=0.272, 0.345, P<0.05). There were significant differences in BMI, WHR and waist circumference between the gout group and the control group（χ2= 55.338, 54.928, 54.153, P<0.05）. After adjusting for age, aerobic exercise and other confounding factors, the results of multi-factor unconditional Logistic regression analysis showed that the odds ratio (OR) of gout in patients with BMI of 24.00-27.99 kg/m2 and ≥28.00 kg/m2 was 2.005 (1.337-3.006) and 2.677 (1.668-4.296) times higher than that of patients with normal BMI, respectively. The OR value of gout in patients with WHR≥0.90 was 1.668 times higher than that in patients with normal WHR, and the difference was statistically significant. The results of subgroup analysis according to age are generally similar. Conclusions　The BMI and WHR of man with gout in Urumqi are higher than those of normal people, and BMI, waist circumference and WHR are all associated with the incidence of gout. The risk of gout increases with the increase of BMI and WHR.

Background Nearly over 40 years have elapsed since the original findings of visual cortical plasticity,but none of drug has been found for curing amblyopia effectively. Objective The goal of this study was to investigate the effects of different dose of levodopa on flash visual evoked potential(F-VEP)and morphology of visual cortex cells in monocular deprivation rat and explore the possible mechanism of curing amblyopia.Methods Monocular deprivation model were established by suturing eyelids of 30 2-week-old Sprague Dawley(SD)rats for 4 weeks.The 30 SD rats were then divided into 3 groups randomly and 10 rats for each group.Normal saline.20 ms/kg levodopa,80 ms/kg levodopa were intragastrically administered once per day after modeling respectively for 4 weeks.F-VEP was recorded after establishment of model and administration of drug respectively.The rats were sacrificed and the visual cogex was obtained for histological examination,and TUNEL technique was used to assess the structural change of visual cortex.Results The latency of P1 wave was significantly longer in the deprived eye than the normal eyes(P<0.05).After administration of levodopa,the latent periods of Pl wave in the deprived eye were obviously shortened in comparison with before administration of levodopa in 20 ms/kg and 80 mg/kg levodopa group (P<0.05).The difference values of latent period of P1 wave between before and after administration of drug showed statistically significant change in three groups(P<0.05).No evidently alterations were found in the amplitude differences of N1 P1 and P1 N2 waves among three groups(P>0.05).The number and structure of neurons in contralateral visual cortex of non-deprived eye were normal.However,the numbers of neurons in deprived eye were significantly less and presented the signs of para-apoptosis in normal saline group.In 20 mg/kg levodopa groups,the alterations of number and morphology in neurons of rat visual eogex were slight.TUNEL assay revealed that the numbers of positive neurons in contralateral visual codex of non-deprived eye were 2.20±1.23.while those in deprived eye were 53.7±9.36,27.20 4±5.96 and 10.70±3.23 in normal saline group,20 mg/kg and 80 mg/kg levodopa group respectively,showing a significant difference among them(P>0.05).After usage of levodopa,the numbers of positive neurons was negatively correlated with the difference value of P,latent period of VEP(r=-0.815,P=0.000).Conclusion Levodopa has a therapeutic effect on rat deprived eye,and its possible mechanism is inhibiting the para-apoptosis of neurons and participating in the development and plasticity of visual system.

Objective To study the causes of emergency department (ED) overcrowding and access block in Beijing.Methods This was a multi-center cross sectional study.The studied cohort of patients included all ED visiting patients from 18 municipal teaching hospital EDs in Beijing from 2012 to 2013.Patient' s characteristics and medical care settings were analyzed.Results The urgent care cases accounted for only 4.6 ％ (71 224/1 554 387) of the emergency annual visits in 2012 and 5.5 ％ (88 190/1 615 571) in 2013.The total number of observation patients in EDs was 185 277 and 211 900 in 2012 and 2013 respectively,with an increase of 14.4 ％ (P ＜ 0.01).The total ED-admission inpatients only accounted for 2.97％ and 2.89 ％ of total annual visits in 2012 and 2013 respectively.The average time of ED-admission took 37.1 hours and 36.2 hours in 2012 and 2013 respectively.The average time of ED stay for observation was 4.9 days and 5.4 days in 2012 and 2013 respectively.Upper respiratory tract infection was the leading illness in annual visits.The leading cause of ED stay for observation was bedridden with pneumonia.Conclusions The ED settings in Beijing are different from other countries.The EDs actually assume the task of the clinic and ED service for 24 hours thereby made EDs terribly overcrowded.The main causes are large number of non-emergency patients visiting the ED and patients in the ED are difficulty to be hospitalized.Patients with end-stage disease and multiple organ failure stayed in the ED due to nursing home shortage.

Objective To screen potential genes associated with drug resistance and multidrug resistance. Methods Microarray with 8000 genes was used to detect the different expression of 5-8F cells and 6-10B cells. Subsquently, genes of drug resistance and multidrug resistance were screened by MILANO online programme. Semiquantitative RT-PCR was utilized to confirmed the reliability of differentially expressed genes. Results 283 genes were identified the differential expression. Of these, 85 genes were shown to be upregulated and 98 downregulated. After the analysis of MILANO, 4 genes including UGT1A9 (15.85 folds),MVP(6.77 folds), CAV1(2.49 folds) and HIF1A(2.67 folds) with higher expression in 5-8F cells were found to be likely associated with drug resistance and multidrug resistance. Subsquently, semiquantitative RT-PCR confirmed the reliability of differential expression of these 4 genes. Conclusion Differentially expressed genes shown in NPC 5-8F cells compared to 6-10B cells with the identification of online MILANO program analysis are likely associated with drug resistance and mnltidrug resistance of NPC cells with the ability of metastasis.

Background Retinal retinoic acid (RA) plays an important role in the formation of the lensinduced myopia.However,it is not clear how RA transfer the myopic signal to choroid throughout the retinal pigment epithelium (RPE) barrier.Objective The aim of this study was to investigate the effect of all-trans retinoic acid (atRA) on the barrier of RPE in lens-induced myopic eye of guinea pig.Methods Thirty left eyes of 30 21-dayold clean guinea pigs were randomized into normal control group and the model group.The models of out of focus were induced by covering of-6.00 D concave lens on the left eyes for 15 days.Radius of corneal curvature was measured using corneal curvimeter,and diopeter of the guinea pig was examined by mydriatic optometry.The length of ocular axis was detected by A-sonography.The animals were sacrificed and the retinas of the left eyes were isolated for the culture and passage of RPE cells.The third generation of cells were incubated Millcell-PET microporous film,and atRA at the concentration of 1 × 10-6,1 × 10-7,1 × 10-8 and 1 × 10-9 mol/L was added to the micropore respectively for 12 hours,and the micropores with equal-solvent served as negative control group.Methyl thiazolyl tetrazolium (MTT)colorimetric method was used to detect the survival rate of the cells.Subsequently,the transepithelial electrical resistance (TER) of the monolayer cells was determined with CN10-EVOM2 resistance measuring meter.The vesicular transport change of RPE membrane in different groups was evaluated by FM1-43 fluorescence staining.Results The mean diopter was (-2.20±0.95) D in the models,and that in the controls was (+ 1.15 ±0.30) D,with a significant difference between them (t =14.57,P＜ 0.01).The axial length was (8.24 ± 0.09) mm in the models and it was significantly longer than (7.81±0.05) mm in the controls (t=17.20,P＜0.01).RPE cells grew well to form a monolayer in Millcell culture pool after one week.After 24 hours of the atRA treatment,the survival rate of RPE cells reduced gradually with the increase of atRA concentration with the highest rate in the 1 × 10-9 mol/L atRA group (93.3 ％) and followed by the 1 × 10-8 mol/L atRA group (88.2％).More than half of the cells dead in the 1 × 10-6mol/L and 1 × 10-7mol/L atRA groups (53.8％ and 47.1％).Significant differences in the TER value and fluorescence staining intensity of the cells were seen among the various groups (F =43.89,P =0.00 ; F =26.13,P =0.00),with the maximal values in the 1 × 10-8mol/L atRA group.The FM1-43 fluorescence located on the cellular membrane and cytoplasm.Conclusions AtRA can increase the functional state of tight junction and vesicular transport,which regulated the RPE cell barrier in the guinea pig.

OBJECTIVE To explore the risk factors of gas gangrene after open trauma for its early diagnosis and precaution.METHODS The data of 42 patients with gas gangrene after open trauma from Aug 2003 to Aug 2008,were collected.The risk factors of gas gangrene after open trauma had been retrospectively analyzed from the cause of the injuries,the distribution of latent period,wound,systemic symptoms,laboratory examination and treatment.RESULTS Gas gangrene after injury was related with open wounds for various reasons.Latent period of gas gangrene was 24-72 h.Early risk factors of gas gangrene among them mainly included degloved or avulsed skin-injury(100%),musce trauma(100.00%),contaminated wound and retained foreign bodies(95.24%),weak pulse of peripheral artery(95.24%),nervous injury(90.48%),and lower temperature of skin aound the wound(83.33%).There were obviously systemic symptoms in infective stage but in early stage were not.CONCLUSIONS Gas gangrene is extremely rare in injury patients but it is life-threatening.So more attention should be paid to the risk factors in order to decrease the incidence of gas gangrene after trauma.Improving the prognosis of patients;the wounded locations should be effectively treated early so as to improve the prognosis.

OBJECTIVETo study a feasible method of measuring right ventricular pressure by catheterization in mice.

METHODSMeasuring the right ventricular pressure and the pulmonary artery pressure by homemade PE pipe through venous cannula in external jugular vein, using catheterization in mice with powerlab multimodal biometric signal recording system.

RESULTSForty-six out of 51 mice were experimented with this method smoothly and got a total success rate of 90.2%. Thirty of 33 normal mice and 16 of 18 mice with pulmonary arterial hypertension (PAH) were catheterized successfully. The right ventricular pressure were as follow: systolic blood pressure: (23.4 +/- 5.7) mmHg in normal group vs (32.2 +/- 2.8) mmHg in mice with PAH, diastolic blood pressure: (3.7 +/- 2.6) mmHg vs (3.8 +/- 2.0) mmHg, mean pressure: (12.0 +/- 3.7) mmHg vs (14.9 +/- 2.3) mmHg. After autopsy for those 5 failed cases, we found that 2 cases were into the inferior vena cava, another 2 cases pierced the right auricle and the last one punctured the axillary vein into the chest wall.

CONCLUSIONMeasuring the right ventricular pressure through venous cannula in external jugular vein with homemade PE pipe in mice gets not only a high success rate but also help to save time. Moreover, this method can be popularized easily. It is a good and feasible method for measuring right ventricular pressure in mice.

OBJECTIVETo investigate the interface bond and thermal compatibility between Mark II machining ceramic and Vita VM9 veneering porcelain.

METHODSA bar shaped specimen (30 mm x 15 mm x 1 mm in size) of Mark II block was prepared, with 0.5 mm-deep notch (vertical to the long axis of specimen) at the middle of the bottom surface. The upper surface was veneered with 0.3 mm VM9 dentin base porcelain. Then the specimen was fractured from the notching site and the fracture surface was examined under scanning electron microscope (SEM) and electron microprobe analyzer (EMPA) with electron beam of 1 microm in diameter. Another ten specimens (30 mm x 15 mm x 1.5 mm in size) were fabricated and the temperature of thermal shock resistance were tested.

RESULTSSEM observation showed tight bond between these two materials and EMPA results showed penetration of Al element from Mark II block into veneering porcelain and Ca element from veneering porcelain into Mark II block occurred after sintering baking. The average temperature of thermal shock resistance for specimens in this study was (194.0+/-10.3) degrees C. Cracks were mainly distributed in veneering porcelain.

CONCLUSIONChemical bond exists between the Mark II machining ceramic and Vita VM9 veneering porcelain, and there is good thermal compatibility between them.