Objective To study the endoscopic anatomy of operative fissures in the sellar region related to pterional key-hole approach and to provide the anatomic basis for endoscope-assisted microneuro-surgery in the region. Methods Fifteen cadaver heads were dissected via pterional key-hole approach and the five operative fissures(Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ) were studied with both microscope and endoscope, by which the outcomes observed were recorded and compared. Results The basic information obtained by the pterio-nalkeyhole approach was comparable to that of the classic ptefional approach. According to the anatomic guideposts under neuroendoscope, the microstructures of the five fissures and Willis' circle would be well demonstrated. It is better to display the various anatomic structures in sellar region by neuroendoscope rather than microscope, particularly some important microstructures. Angled endoscope can be used to inspec thidden but important structure behind the arteries and nerves. Conclusion According to the anatomic guideposts, an endoscopy can be used to enhance the visible field of an operative microscope related to pterional key-hole approach. The endoscope-assisted microsurgery can reduce complications and injury of the important structures and increase the curative effect on the lesions in the sellar region.

A comprehensive analytical method based on ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) was developed for the simultaneous determination of active components and anti-diabetic) drugs in propolis health foods. The samples were extracted by ultrasound extraction with methanol). The insoluble residue of extract was removed by freeze-centrifuging. The analysis was performed on an ACQUITY UPLC C_(18)) column(50 mm ×1 mm, i.d., 1.7 μm) utilizing a gradient elution profile and a mobile phase of 0.3% formic acid in water and acetonitrile. The analytes were detected using an electro spray ionization tandem mass spectrometry with multiple reaction monitoring. Qualitative and quantitative analysis was based on the peak area of the parent ion and two fragment ions. The LOD and LOQ level for 14 active components ranged from 0.7 mg/kg to 42.0 mg/kg and 2.2 mg/kg to 140 mg/kg respectively, and recoveries were 77.8%-113.6%, with the intra- and inter-day precision less than 15%. The LOD and LOQ level for 9 anti-diabetics) ranged from 0.1 mg/kg to 0.9 mg/kg and 0.3 mg/kg to 2.5 mg/kg respectively, and recoveries) were 79.3%-108.5%, with the intra- and inter-day precision less than 15%. The method is simple) and sensitive, and can be used for quality control of propolis.

Objective To investigate the association between Has‐miRNA‐149 polymorphism and susceptibility of digestive tract cancer .Methods A systematic search of Pubmed ,EMBASE and Web of Science ,CNKI ,Wanfang was conducted for relevant studies .The odds ratios(OR) and 95% confidence intervals(95% CI) calculated by Stata12 .0 software were used to assess the asso‐ciation between Has‐miRNA‐149 polymorphism and risk of digestive tract cancer .The Q test ,I2 value and funnel plot were conduc‐ted to examine heterogeneity and publication bias ,respectively .Results A total of thirteen eligible studies containing 4 424 cases and 5 290 controls were included in this Meta analysis .There were significant relationships between Hsa‐miRNA‐149 polymorphism and susceptibility of digestive tract cancer (Domina model CT+CC vs .TT ,OR=0 .915 ,95% CI:0 .840-0 .996 ,P=0 .040 ;Hetero‐zygous model CT vs .TT ,OR=0 .880 ,95% CI:0 .803 -0 .965 ,P=0 .007) .In the stratified analysis ,it was found that the risk of colorectal cancer decreased in patients carrying CC/CT genotypes(OR=0 .834 ,95% CI:0 .715-0 .972 ,P=0 .021) ,especially in A‐sians (CT+CC vs .TT ,OR=0 .894 ,95% CI:0 .818-0 .977 ,P=0 .013) ,while that was not found in the Caucasoids .Conclusion Has‐miRNA‐149 polymorphism is associated with the susceptibility of digestive tract cancer .The CC/CT genotypes may decrease the risk of digestive tract cancer ,especially in Asians .

Experiments were conducted to investigate the suitability of the multistage in-situ reaction analyzer based on a micro fluidized bed ( MFB-MIRA) for measuring the rapid change of the gas concentration during gas-solid reactions. The results showed that the control performance of capillary temperature had a great impact on the stability of on-line measurement. Based on the observed regular patterns, the capillary temperature control system was equipped with a precision temperature controller. The control precision of capillary temperature reached ± 0 . 2℃, which guaranteed the high stabilities of the sampling flow rate and the chamber vacuum. The measured results of the modified gas monitoring system showed the periodic fluctuations of the on-line measurement were eliminated. The stability of measurement was significantly improved. The fluctuating range and relative standard deviation of the measured response to O2 in air changed from 1. 9% and 0. 5% to 1. 4% and 0. 2%, respectively. A pressure regulating device was also developed to control the absolute pressure at the gas sampling point. The control precision reached ± 0. 02 kPa. The measured results showed that the response of the process mass spectrometer was positively correlated with the absolute pressure at the sampling point, indicating the necessity of the pressure regulating device. The accuracy and repeatability of process mass spectrometer were improved. This study has enhanced the suitability of MFB-MIRA for studying rapid gas-solid reactions and broadened the scope of reliable applications of MFB-MIRA and process mass spectrometer.

Objective To evaluate the diagnostic value of Tuberculosis Infection in T Cell Test(T‐SPOT .TB) for smear negative pulmonary tuberculosis .Methods Separately used T‐SPOT .TB ,TB‐DNA ,TB‐DOT the three diagnostic methods for tuberculosis , separately detected with each method ,112 smear negative pulmonary tuberculosis ,and 60 non tuberculosis regarded as control group .Results The sensitivity of T‐SPOT .TB ,TB‐DNA ,TB‐DOT in proper sequence were 88 .3% ,25 .9% ,58 .9% .Contrasted to TB‐DNA and TB‐DOT ,the differences were statistically significant(X2 =86 .6 ,P<0 .01 ;X2 =23 .3 ,P<0 .01);the specificity of T‐SPOT .TB was 96 .7% ,significantly higher than TB‐DOT (78 .3% ) ,the differences were statistically significant(X2 = 9 .22 ,P<0 .05) .Conclusion T‐SPOT .TB has obvious advantages in sensitivity and specificity for smear negative pulmonary tuberculosis .It can be one auxiliary tool for smear negative pulmonary tuberculosis early diagnosis ,provided with the value of fast and accurate .

Objective To identify the metabolic levels in prefrontal lobe in patients with post-concussion syndrome by proton magnetic resonance spectroscopy (1H-MRS), and to explore the relationship between metabolic levels and executive function. Methods The study was conducted in 40 patients with post-concussion syndrome and 20 normal controls. 1H-MRS on prefrontal lobe was performed in patients and controls, the NAA, Cho and Cr were measured and the ratios of NAA/Cr, Cho/Cr and NAA/(Cho + Cr) were determined. They were also evaluated executive functions by verbal fluency test (animal), Wisconsin Card Sorting Test (WSCT) and Tower of Hanoi (TOH). Results Compared with normal controls, the patients with post-concussion syndrome were significantly lower NAA/Cr and NAA/(Cho+Cr) ratios in left prefrontal lobe (P < 0.05). The NAA/Cr ratio in left prefrontal was significantly positive correlated with total scores of verbal fluency (r = 0.66, P < 0.05), categories of WSCT (r = 0.54,P < 0.05) and total score of TOH(r = 0.58, P < 0.05). The NAA/Cr ratio was significantly negative correlated with total errors (r = -0.53, P < 0.05) and persistent errors (r = -0.47, P < 0.05) of WSCT and mean executive time of TOH(r = -0.67, P < 0.05). Conclusions The metabolic levels of NAA in left prefrontal lobe in patients with post-concussion syndrome is significantly decreased , it is one cause of impaired executive functions.

A method for simultaneous determination of 20 Perfluorinated alkyl substances ( PFAS) in animal liver using QuEChERs and HPLC_MS/MS technique was developed. The samples were extracted with 0. 1%hydrochloric acetonitrile and cleaned up with C18 , N_Propylethylendiamine ( PSA ) and graphitized carbon blacks ( GCB ) . The analytes were separated by a reversed phase C18 column and gradiently eluted with a mixed solution of 5 mmol/L ammonium acetate methanol and 5 mmol/L ammonium acetate. The samples were quantified using isotope internal standard and external standard with the matrix matched standard calibration curve method. Good linearity was obtained for all the 20 PFAS at the concentration of 0. 1-10 μg/L with the linear correlation coefficients more than 0. 9995. The limits of detection (LOD) and the limits of quantification ( LOQ) for PFAS were 0. 05-0. 2 μg/kg and 0. 4-0. 5 μg/kg, respectively. The recoveries at three different concentration levels ( 0 . 5 , 2 and 5 μg/kg ) were in the range of 70 . 3% -108 . 1%. The repeatability expressed as relative standard deviations (RSD) was ranged from 2. 1% to 11. 9% (n=6).

The metabolic profiles of control and MCF-7 cells treated with luteolin were analyzed separately using gas chromatography/mass spectrometry ( GC/MS ) to study the mechanism of the luteolin treatment on MCF-7 cells. Cell viability assays showed that luteolin had inhibition effect on MCF-7 cells. Partial least square discriminant analysis ( OPLS-DA) was used to process the metabolic data. Since cells in phase of S were increased significantly, we speculated that luteolin had a blocking effect on pentose phosphate pathway of MCF-7 cells, which contributed to its inhibition effect on proliferation of MCF-7 cells.

Objective To evaluate the efficacy, advantages and shortcomings of micro-percutaneous nephrolithotomy in treatment of uncomplicated ureteral calculi.Methods Clinical data were collected from 126 patients with a failure treatment of history by ESWL (extracorporeal shock wave lithotripsy) and RIRS (retrograde intrarenal surgery) in treatment of upper ureteral calculi (< 3.0 cm) from June 2015 to May 2016. Antegrade percutaneous access was obtained by B-type ultrasound guidance. Micro-PCNL was done using YAG laser fiber or pneumatic through the ureteroscope (F4.5~F6.5、F6.0~F7.5, 315 mm) to disintegrate the stones. The calculi clearance rate, operation time, operative hemorrhage, length of hospital stay and complications of the patients were analyzed after operation.ResultsThe calculi clearance rate was 88.9%, the operation time was 15~75 min, the operative hemorrhage was 15~35 ml, the length of hospital stay was 5~10 d. Only one patient need the second stage surgery because of intraoperative hemorrhage affected the surgical ifeld. No patients occurred massive hemorrhage, pneumothorax, bowel and other complications such as organ damage.Conclusion Micro-PCNL had a good clinical curative effect and security in treatment of uncomplicated ureteral calculi, which was worthy of promoting clinically.

Objective:To analyze the risk factors of hepatocellular carcinoma microvascular invasion (MVI) and to construct a preoperative prediction clinical scoring system.Methods:A retrospective analysis was made on 113 patients with hepatocellular carcinoma undergoing hepatectomy at Zhongshan Hospital from March 2018 to Jun 2019.Postoperative pathology confirmed 35 cases with microvascular invasion.Results:The multivariate logistic regression model showed that the maximum tumor diameter( OR: 1.028, 95% CI: 1.001-1.005), the smoothness of the capsule edge( OR: 0.208, 95% CI: 0.062-0.699), the positive circulating tumor cells (CTC)( OR: 3.728, 95% CI: 1.029-13.501) and abnormal prothrombin(PIVKA-Ⅱ)( OR: 1.001, 95% CI: 1.000-1.002) were risk factors for MVI. The area, sensitivity and specificity of the clinical score constructed by assigning 1 point to each risk factor were 0.906, 74.29% and 92.31%, respectively. Clinical scores of 0, 1, 2, 3, and 4 predict MVI positive rates of 0 (0/26), 9.09% (3/33), 28.57% (6/21), 77.78% (14/ 18), 85.71% (12/14). Conclusions:Tumor maximum diameter>62 mm, PIVKA-Ⅱ>115 mAU/ml, unsmooth tumor capsule and CTC in peripheral blood are independent high risk factors in patients with MVI.