Objective To compare the iodine contrast agent dosage,radiation dose and image quality in CT pulmonary angiogra-phy (CTPA)with low tube voltage and high tube current in 64-slice spiral CT.Methods 60 patients with suspected pulmonary em-bolism in our hospital were randomly chosen and divided into three groups:Group Ⅰ:20 patients,using 120 kV,180 mA,contrast dose of 70 mL.Group Ⅱ:20 patients,using 100 kV,280 mA,contrast dose of 50 mL.Group Ⅲ:20 patients,using 80 kV,automat-ic tube current modulation techniques (300-500 mA),comparative dose of 30 mL.CT values and image noise of three pulmonary central areas and a segment branch were measured in each group.Objective indicators,subjective image quality assessment,CT dose index volume (CTDIvol),dose-length product (DLP)and effective absorbed dose (ED)were compared in three groups to evaluate the value of low kV,high mA with low-contrast dose in CTPA.Analysis of variance and t-test was used for data analysis.Results Compared with those of the standard method of CTPA,all pulmonary dry in two groups of low dose were well displayed.There was no statistical significance between each two groups in image quality score (P > 0.05),but was statistical significance in CT values, noise,SNR and CNR (P < 0.01).The CT radiation dose,CTDIvol and DLP of Group Ⅱ and Group Ⅲ were significantly lower than those of Group Ⅰ (P < 0.01).Conclusion Compared with traditional methods,low dose contrast agent injections under 80 kV could reduce the dose of contrast agent and the effect of hardening artifacts due to contrast agent in superior vena cava on right pul-monary artery.It is helpful to reduce the risk of contrast induced nephropathy and reduce patients’exposure to X-ray radiation.

Objective To compare the vascularization of collagen scaffolds with or without growth factors and their efficacy on cardiac function in postinfarcted rats underwent surgical ventricular restoration.Methods Collagen scaffolds were activated with 1-ethyl-3-[3-dimethylaminopropyl]carbodiimide hydrochloride chemistry (EDC) as control or continually covalently immobilized with vascular endothelial growth factor (VEGF) and VEGF + basic fibrohlast growth factor (bFGF) as experimental groups.Adult SD male rats underwent left anterior descending artery (LAD) ligation to generate transmural myocardial infarction(MI).Four weeks later,by echocardiography,rats with moderate scar size(25％-35％ akinetic area of freedom wall of left ventricle) were screened out,assigned into 3 groups randomly and received the surgical ventricular restocation (SVR).Then,cardiac function was measured by echocardiography at 1w,2w and 4w after patch implantation.At endpoint of study (4w after patch implantation),the rats were sacrificed and the hearts were harvested.Vascularization of patch were determined by capillary density (evidenced by vWFⅧ staining) or mature vessel density (evidenced by SMA staining) respectively.Results The general mortality of the animal model is 15％ (6/40).A significant improvement of cardiac function was observed in all animals at 1 w after patch implantation but that was better preserved in both cytokine-conjugated groups 4w later (control group vs.VEGF group,P ＜ 0.05,control group vs.VEGF + bFGF group,P ＜ 0.01).More capillaries were present in patch with growth factors (P ＜0.05),while significant functional vessel formation was observed only in VEGF + bFGF group (P ＜0.01 vs.control or VEGF group).Additionally,we identified a positive correlation between heart function and mature vessel density (P =0.0297,r2 =0.998).Conclusion The mechanical property of collagen scaffold can be effectively improved by EDC,the growth factors immobilized in scaffold were in favor of vascularization of patch,which may facilitate the preservation of cardiac function posterior to SVR.

Aim To determine the effective compo-nents of Semen Ziziphi Spinosae for sedative-hypnotic and its mechanism. Methods The extraction of Se-men Ziziphi Spinosae and the rat brain homogenates were prepared. High concentrations of Diazepam com-petitively replaced the ligand compounds of Semen Ziz-iphi Spinosae combining BDZ receptor in brain tissue, and all the compounds with sedative and hypnotic effects were collected and identified by HPLC and LC-MS technique, as the compounds extracted from the brain tissue were administered with Semen Ziziphi Spi-nosae. The brain tissue was administered with Diaze-pam, and with Semen Ziziphi Spinosae and Diazepam. Results The HPLC chromatograms show that the peak time of BDZ receptor ligand compounds was 2. 71 min and 46. 87min, when compared with Diazepam. And the LC-MS chromatograms display the relative molecu-lar weight of the ligand compounds was 274. 28 m/z, 453. 34 m/z,496. 34 m/z and 608. 38 m/z respective-ly. According to the fingerprint of Semen Ziziphi Spi-nosae, these compounds may be fatty acid substances and lupine pill triterpene compounds. Conclusions On the basis of the principle of receptor ligand bind-ing, we established a way to quickly analyze and iden-tify the role of natural products in the same drug target compounds. The method not only can clearly define the effective components of natural products, but also clar-ify the mechanism of action of the compounds. The ac-tive ingredient of calm hypnosis in Semen Ziziphi Spi-nosae may be fatty acid substances Palmitic acid ( C16 H32 O2 ) and lupine pill triterpene compounds Alphitolic acid( C30 H48 O4 ) and Spinosin( C28 H32 O15 ) . They exert their sedative and hypnotic effects by combining with BDZ receptor, and the research has laid a theoretical foundation for the further study about mechanism of Se-men Ziziphi Spinosae.

The construction of health file of patients with brucellosis in Qinghai Province was based on the Qinghai Provincial Public Health Network Information Platform. It was jointly participated and implemented by animal husbandry and veterinary departments, animal disease control centers, disease control centers and hospitals at all levels, to achieve standardized management of early detection, early diagnosis, early treatment, as well as follow-up, review, and efficacy evaluation. After analyzing the health file of brucellosis patients, we proposed to strengthen the propaganda of brucellosis, collect information from multiple diseases, share resources with multiple departments, integrate human resources and exert management responsibilities, and explore opinions and countermeasures suitable for local working conditions. The establishment of a health file for patients with brucellosis could fully grasp the diagnosis and treatment of brucellosis patients, facilitate the management of follow-up and review, and it was helpful to understand the distribution and prevalence of brucellosis in Qinghai Province, and to warn the epidemic trend.

Objective:To explore the efficacy and safety of intraoperative hyperthermic intraperitoneal chemotherapy combined with total laparoscopic D2 radical gastrectomy in the treatment of gastric cancer.Methods:The clinical data of 127 patients with gastric cancer who were admitted to the Central Hospital of Hanzhong in Shaanxi Province from August 2017 to July 2019 were retrospectively analyzed. All patients underwent total laparoscopic D2 radical gastrectomy, of which 58 patients underwent total laparoscopic D2 radical gastrectomy combined with intraoperative hyperthermic intraperitoneal chemotherapy (observation group), and 69 patients underwent total laparoscopic D2 radical gastrectomy (control group). Observation indicators included surgical and postoperative recovery situations and postoperative tumor-related indicators. Follow-up was performed by using outpatient examination and telephone interview, and the content of follow-up included patient's adjuvant chemotherapy, tumor recurrence and metastasis, and surgery-related complications.Results:In the observation group, the intraoperative blood loss was (199±48) ml, the number of lymph node dissection was 35±8, the total hospitalization cost was (53 261±4 316) yuan, alanine aminotransferase was (30±10) U/L, and creatinine was (124±26) μmol/L; in the control group, the intraoperative blood loss was (184±46) ml, the number of lymph node dissection was 34±13, the total hospitalization cost was (52 146±4 817) yuan, alanine aminotransferase was (31±10) U/L, and creatinine was (128±33) μmol/L; there were no significant differences between the two groups ( t values were 1.833, 0.618, 1.363, 0.721, and 0.856, all P > 0.05). In the observation group, the operating time was (352±44) min, carcinoembryonic antigen (CEA) at 1 month after operation was (3.9±2.1) ng/ml,CEA at 6 months after operation was (12.7±7.2) ng/ml, tumor abnormal protein (TAP) at 1 month after operation was (75±36) μm 2,TAP at 6 months after operation was (131±33) μm 2; in the control group, the operating time was (308±58) min,CEA at 1 month after operation was (8.3±4.5) ng/ml, CEA at 6 months after operation was (15.8±4.2) ng/ml, TAP at 1 month after the surgery was (88±24) μm 2, TAP at 6 months after operation was (149±37) μm 2; there were significant differences between the two groups ( t values were 4.792, 7.185, 2.832, 2.284, and 2.984, all P<0.05). One hundred and twenty seven patients were followed up for 12-24 months. Fifty-one and 58 patients in the observation group and control group received postoperative adjuvant chemotherapy, and there was no significant difference between the two groups ( χ2 = 0.389, P = 0.533). Tumor recurrence was respectively detected in 0 and 6 patients in the observation group and control group at 6 months after operation; tumor recurrence was respectively detected in 2 and 11 patients in the observation group and control group at 1 year after operation; the differences in the recurrence rates between the two groups were statistically significant (both P < 0.05). Conclusion:Intraoperative hyperthermic intraperitoneal chemotherapy combined with total laparoscopic surgery for gastric cancer does not increase the patient's perioperative risk and the incidence of postoperative complications, and it can reduce the risk of postoperative recurrence and improve the short-term efficacy.

OBJECTIVE：To i nvestigate the metabolism stabilities of novel hypoglycemic compound LSM- 13 in rat liver microsomes，and to analyze the possible metabolites. METHODS ：LSM-13 was dissolved in rat liver microsome incubation system initiated by reduced nicotinamide adenine dinucleotide phosphate ，and was incubated in water at 37 ℃. The reaction was terminated with acetonitrile at 0，5，10，15，30，45 and 60 min，respectively. Using indomethacin as internal standard ，the concentration of LSM-13 in incubation system was determined by HPLC. The residual percentage and enzyme kinetic parameters of LSM- 13 were calculated at different incubation time points with the concentration of LSM- 13 incubated for 0 min as reference. UPLC-Q-TOF/MS was used to analyze and speculate the metabolites of LSM- 13 in rat liver microsomes. RESULTS ：After 60 min incubation ，the remaining percentage of LSM- 13 was（56.07±0.95）％，the half-life was 42.78 min，and the intrinsic clearance was 0.032 4 mL/（min·mg）. Compared with total ion flow diagram of rat liver microsome blank samples ，three chromatographic peaks were added in the samples incubated for 60 min；the corresponding molecular ion peaks were m/z 505.133 8，417.102 4，293.111 7 [M+H]+；the possible metabolites may be dehydrogenation ，O-debentylation and hydrolysis products of LSM- 13. CONCLUSIONS ： The compound LSM- 13 has moderate stability in rat liver microsomes ，and may undergo dehydrogenation ，O-debentylation and hydrolysis.

OBJECTIVE： To design and synthesize N-aroyl substituted indoline-3-acetic acid derivatives and evaluate their in vitro hypoglycemic activity. METHODS： Using indoline derivative 2-[5-（benzyloxy）-1-（4-chlorobenzoyl）-2-methyl-1H-inclol-3-yl]acetic acid （GY3） as leading compound， 4-（benzyloxy）phenyl hydrazine hydrochloride and methyl 4-oxopentanoate as raw material， 8 kinds of N-aroyl （3-hydroxybenzoyl， 3-cyanobenzoyl， 4-nitrobenzoyl， 4-methylsulfonylbenzoyl， 4-acetamidobenzoyl， 3-acetylaminobenzoyl， isoniacyl and pyridine-2-formyl） substituted indoline-3-acetic acid derivatives were synthesized via 4 steps reactions： Fischer indole cyclization， reduction， amidation and hydrolyzation. The human hepatoma HepG2 cell lines were used to investigate the glucose consumption activity of the target compounds. RESULTS： Totally 8 various N-aroyl substituted indoline-3-acetic acids were synthesized and their structures were confirmed by mass spectrum（MS）， nuclear magnetic resonance 1H-NMR and 13C spectrum. Under the condition of 1.0 μmol/L， the percentage of glucose- promoting consumption of the synthesized compounds on HepG2 cells was 5.4％-9.1％. 2-[（2R， 3S）-5-benzyloxy-2-methyl-1-（4-methylsulfonyl benzoyl）-2，3-dihydro-indole-3-yl] acetic acid showed the best hypoglycemic activity. The percentage of glucose- promoting consumption was （9.1±1.81）％， which was close to that of positive control metformin [（10.58±1.68）％]， but less potent than that of leading compound GY3[（12.15±0.78）％]. CONCLUSIONS： Different electron-withdrawing substituents are introduced into N-aroyl aromatic rings of dihydroindole compounds， such as cyano， nitro， methyl sulfonyl； hypoglycemic activity decreases in varying degrees and is weaker than halogen substituents.

Objective: To investigate the value of enhanced recovery after surgery (ERAS) in D2 radical resection of distal gastric cancer under total laparoscopy and its effect on inflammatory factors. Methods: The clinical data of 50 patients with distal gastric cancer at Hanzhong Central Hospital from March 2016 to October 2017 were retrospectively analyzed. The patients were divided into the observation group (25 cases) and the control group (25 cases). The observation group received totally laparoscopic radical D2 gastrectomy for distal gastric cancer under the guideline of ERAS; the control group received totally laparoscopic radical D2 gastrectomy for distal gastric cancer under the guideline of the traditional method. The changes of perioperative related indexes, postoperative recovery and postoperative inflammatory indexes were compared between the two groups. Results: All 50 patients successfully completed the operation. The operation time was (287.2±52.3) min and (296.8±57.9) min, respectively of the observation group and the control group; the number of lymph node dissection was (34.0±11.0) and (34.6±14.3), respectively of the observation group and the control group. There were no significant differences in the above indexes between the two groups (all P > 0.05). The hospitalization time, the hospitalization cost, the postoperative time of getting out of bed of the observation group was (22.0±2.8) d, (61 044.4±4 692.7) yuan, (12.8±1.8) h. The hospitalization time, the hospitalization cost, the postoperative time of getting out of bed of the control group was (23.9±1.9) d, (63 875.81±4 392.6) yuan, (23.7±8.2) h. And there were statistically significant differences between the two groups (all P < 0.05). The pain score on the 1st day was (5.0±0.8) score and (6.4±1.0) score, and on the 4th day was (2.7±0.9) score and (3.9±0.9) score, respectively of the observation group and the control group, and there was a statistical difference (all P < 0.05). There was no statistical difference in the 7th day pain score between the two groups (P > 0.05). There were no statistically significant differences in the tumor necrosis factor α, interleukin-6 (IL-6), C-reactive protein and procalcitonin on the day before the operation of both groups (all P > 0.05); the levels of above four factors in the observation group were lower than those in the control group on the 1st, 4th and 7th day after the operation, and the differences were statistically significant (all P < 0.05). Conclusion The application of ERAS in totally laparoscopic radical resection of gastric cancer can improve the postoperative condition, significantly reduce the inflammatory reaction of patients, which has a certain value of improving the quality of life of patients.

OBJECTIVE：To investigate th e stabilities of antitumor candid ate Gedatolisib in plasma in vitro and simulated gastric/intestinal fluids ，and to analyze the possible catabolites in plasma. METHODS ：HPLC method was adopted. Using indometacin as internal standard ，the contents of Gedatolisib incubated in plasma of SD rats （male）for 0，0.5，1.0，1.5，2.0，3.0 h and blank simulated gastric fluid （pH 1.3，no enzyme ），blank simulated intestinal fluid （pH 6.8，no enzyme ），simulated gastric fluid（pH 1.3，containing pepsin ）and simulated intestinal fluid （pH 6.8，containing trypsin ）for 0，0.5，1.0，2.0，3.0，4.0，6.0 h were determined. The remaining percentage of Gedatolisib was calculated. UPLC-Q-TOF/MS was used to analyze the TIC of blank plasma and incubated samples. The differential peaks were compared， and catabolites were inferred by MS 1Z073）.gzwjkj2019-1- chromatograms. RESULTS ： The remaining percentage in plasma of rats for 2.0 h was about 63％，and there was nosignificant change after continued incubation. The remaining percentage of Gedatolisib incubated in blank simulated intestinal fluid for different time ranged （99.18 ± 2.15）％ -（103.20 ± 3.41）％ . The remaining percentage in simulated com intestinal fluids for 2.0 h ranged （88.76 ± 1.53）％ . The remaining percentage in blank simulated gastric fluids for 2.0 h was ranged （85.63±1.55）％，and there was no significant change after continued incubation. The remaining percentage in simulated gastric fluid was from （94.94±3.52）％（0 h）to（16.19±1.17）％ （6.0 h）. TIC of UPLC-Q-TOF/MS showed that the differential peaks of incubated samples and blank plasma was 6.42 min under positive mode scanning ，molecular ion peak of m/z 616.335 1，simulated 632.327 7，630.317 0，602.278 6 [M+H]+ could be found in scanning channel. It was speculated that Gedatolisib could generate 1-（4-（3-（4，6-dimorpholino-1，3，5-triazin-2-yl）phenyl）urea） benzoyl）-N，N-dimethylpiperidin-4-amine oxide ，1-（4-（4-（dimethylamino）piperidine-1-carbonyl）phenyl）-3-（4-（4-morpholino-6- （3-oxomorpholino）-1，3，5-triazin-2-yl）phenyl）urea and 1-（4-（3-（4-（4，6-dimorpholino-1，3，5-triazin-2-yl）phenyl）urea） benzoyl）-N-methylpiperidine. CONCLUSIONS ：Gedatolisib is not stable in rat plasma ，and it may undergo terminal N oxidation， morpholine ring oxidation and terminal N demethylation. Gedatolisib is stable in artificial intestinal fluid and blank artificial gastric/ intestinal fluid ，and degrades obviously in the presence of pepsin.