Objective To study the effect and value of hepatoarterical catheter chemotherapy in treating gastric carcinoma with liver metastasis. Methods A total of 31 cases of gastric carcinoma with liver metastasis undergoing radical operation were preoperatively randomly divided into 2 groups: Regional infusion chemotherapy (treatment group, 17 cases) and peripheral venous chemotherapy (control group, 14 cases). Results The short-term effectiveness of the treatment group was 88.3 %(15/17). The survival rates of 1, 2, 3 year were 88.2 %, 62.7 %, 28.9 %, respectively. However, the short-term effectiveness of the control group was 28.6 %(4/14). The survival rates of 1, 2, 3 year were 68.1 %, 38.9 %, 13.0 %, respectively. There was obvious difference between the two groups (χ~2 = 12.87, P <0.05;χ~2 =5.511, P<0.01). Conclusion Hepatoarterical catheter chemotherapy is effective for gastric carcinoma with liver metastasis undergoing radical operation and has less toxic side effects.

BACKGROUND: Studies have demonstrated that platelet-rich plasma can promote osteogenesis and proliferation of bone marrow mesenchymal stem cells, adipose-derived stem cells and skeletal muscle satellite cell, but whether it can promote the proliferation and osteogenesis of human umbilical cord mesenchymal stem cells (hUC-MSCs) is unclear. OBJECTIVE: To investigate the effects of different concentrations of platelet-rich plasma on the proliferation and osteogenic differentiation of hUC-MSCs. METHODS: Passage 5 hUC-MSCs were cultured in medium containing different concentrations of platelet-rich plasma (0, 250, 500, 750, 1000, 2000 ng/L), respectively. Cell proliferation was detected at 1, 3, 5, 7 days after culture, and the best platelet-rich plasma mass concentration was screened. Afterwards, passage 5 hUC-MSCs were divided and cultured in complete medium (blank control group), optimal concentration of platelet-rich plasma (platelet rich plasma group), osteogenesis induction medium (osteogenic induction group), or the osteogenesis induction medium containing the optimal concentration of platelet-rich plasma (combined group). Cell activity of alkaline phosphatase was detected after cultivated for 3, 7, 14 days. Osteopontin, bone specific transcription factor, and osteocalcin mRNA relative expression levels were detected after cultivated for 7, 14, 21 days. Mineralization of the extracellular matrix was detected after cultivated for 21 days. RESULTS AND CONCLUSION: After 5 and 7 days of culture, the cell proliferation was higher in 500, 750, 1000 ng/L platelet-rich plasma groups than 0 ng/L group (P < 0.05), and 750 ng/L platelet-rich plasma showed the best effect on cell proliferation, which was used in the following experiments. Compared with the other groups, the combined group had significantly increased alkaline phosphatase activity (P < 0.05), and up-regulated osteopontin, bone specific transcription factor and osteocalcin mRNA relative expression levels (P < 0.05) at different culture times. In addition, the degree of extracellular matrix mineralization in the combined group was also higher than that in the other three groups (P < 0.05).To conclude, 750 ng/L platelet-rich plasma can promote hUC-MSCs proliferation and osteogenic differentiation.

Objective:To explore the function of the cya gene and the preliminary mechanism of attenuated strain.Methods:The biological characteristics of cya mutant in acid and alkali resistant,salt resistance,motility,biofilm components,poisonous to the cells of epithelial cell adhesion,invasion were analysis.Results:The mobility capabilities,acid and alkali resistance and salt tolerance of cya mutant were significantly lower than the parent strain;the composition testing revealed that the cya mutant did not produce cellulose,curli and biofilm;at the same time the adhesion and invasion to epithelial cells of cya mutant had a prominent depression,and the toxicity to HeLa cells was weaker than the parent strain.Conclusion:The function of cya gene is closely related to athletic ability, penetration of cell membrane, the formation biofilm and virulence.It will provide a theory reference to the functional research of Salmonella typhimurium cya gene and the mechanism of attenuated strain.This will contribute to the development of oral vaccine using attenuated Salmonella typhimurium as vector.

Objective: To investigate the clinical effect of plasma exchange (PE) versus double plasma molecular adsorption system combined with PE (DPMAS+PE) in the treatment of toxic hepatic failure. Methods: A total of 67 patients with toxic hepatic failure who were admitted during the same period of time were divided into PE group, DPMAS+ PE group, and control group. The 22 patients in the PE group were treated with PE alone, and the 24 patients in the DPMAS+PE group were given DPMAS combined with PE. The clinical out-come was compared between the three groups. Results: Both treatment groups had significantly higher clinical response rate and 24-week survival rate than the control group. After treatment, both treatment groups had significant reductions in the serum levels of total bilirubin (TBil) , direct bilirubin (DBil) , alanine aminotransfer-ase (ALT) , and aspartate aminotransferase (AST) , and the PE group had significant reductions in the albumin (Alb) level and activated partial thromboplastin time (APTT) (P<0.05) ; the DPMAS+PE group showed no sig-nificant changes in the Alb level and APTT (P>0.05). There were no significant differences in TBil, DBil, ALT, and AST between the two treatment groups after treatment (P>0.05). After treatment, the PE group had significantly higher Alb level and APTT than the DPMAS + PE group (P<0.05). Compared with the control group, both treatment groups had significant reductions in TBil, DBil, ALT and AST after treatment (P<0.05). Conclusion The two artificial liver support techniques can significantly improve patients' liver function and in-crease their survival rate, and the combined artificial liver support technique can reduce the amount of plasma used.

Objective To analyze the biological characteristics of a mutant strain of Salmonella ty-phimurium SL1344 with sseK2-deletion (SL1344△sseK2) in order to provide reference for further study of safe and effective live vaccines. Methods The mutant strain SL1344△sseK2 with a deletion of 1047 bp in sseK2 gene was constructed through a two-step allelic exchange using recombinant suicide plasmid. Its com-plemented strain, SL1344C△sseK2, was also constructed. Biological and immunological characteristics of the mutant strain were detected. Results PCR, double-enzyme digestion and sequencing analysis showed that the mutant strain SL1344△sseK2 and the complemented strain SL1344C△sseK2 were successfully con-structed. The serotype of the mutant strain was 1,4,[5],12:i:1,2, identical to the parent strain SL1344. In addition, the mutant strain showed no significant change in biochemical characteristics or growth rate and was genetically stable in vitro. Compared with the parent strain SL1344, the virulence of SL1344△sseK2 was attenuated in BALB/ c mice. The median lethal dose of SL1344△sseK2 for 6-week-old BALB/ c mice was 3. 44×108 colony-forming units (CFU), which was 1620 times lower than that of SL1344. Oral immuniza-tion with SL1344△sseK2 protected 62. 5％ of the mice against challenge with wild Salmonella typhimurium strains on 17 d after vaccination. The levels of serum IgG antibody peaked on 14 d after immunization. No significant difference in biological characteristics was observed between the complemented and the parent strains, indicating that the mutant strain was basically complemented to the wild-type strain.Conclusions The mutant strain SL1344△sseK2 was constructed successfully and genetically stable with sig-nificantly attenuated virulence and good immunogenicity. This study suggested that sseK2 gene played an im-portant role in regulating the virulence of SL1344, which might provide reference for further study of its func-tion and for assessing its potential as a candidate live attenuated vaccine.

Objective: To observe the effect of different doses of Shenfu injection on prognosis and quality of life for patients with vasovagal syncope (VVS). Methods: A total of 126 patients were randomly divided into 3 groups. The control group (n=38) were treated by western medicine comprehensive therapy with tilting training. The low and high dose Shenfu injection groups were treated by Shenfu injection 40 ml/d (n=44) and 120 ml/d (n=44) on the treatment basis of control group. All the groups were treated for 14 days. The patients were followed up for 1 year after discharge. The relapse rate of syncope, quality of life social support rating scale (SSRS), effective rate of treatment, time of stable blood pressure, time of stable heart rate, recovery time of autonomic nervous disorder and adverse reactions were observed in each groups. Results: The total effective rate was 47.4% (18/38) in the control group, 72.7% (32/44) in the low dose group, and 90.9% (40/44) in the high dose group. The difference between the three groups was statistically significant (χ²=18.997, P<0.01), and the total effective rate of Shenfu injection high-dose group was significantly higher than that of low-dose group (P<0.05). After treatment, there were significant differences in the recovery time of blood pressure, heart rate and autonomic nervous disorder among the three groups (F=19.165, 158.428, 33.405, P<0.01). The above indicators in the high dose group of Shenfu injection were significantly higher than the low dose group (t=-4.020, -5.180, -5.307, P<0.05). After 1 year of follow-up, the recurrence rate of the control group was 61.1% (11/18), the low-dose group was 18.8% (6/32), and the high-dose group was 5% (2/40), where there was significant difference among all the groups (χ²=20.886, P<0.01). The quality of life scores were compared for 1 year among the 3 groups, and the difference was statistically significant (F=23.025, P<0.01). Conclusions The Shenfu injection combined with Western medicine comprehensive therapy can improve the prognosis and quality of life of patients with VVS, and the improvement of each indicator of daily dosage of 120 ml is better than the daily dosage of 40 ml Shenfu injection.

Objective To investigate the clinicopathological characteristics and prognosis of female breast cancer patients with different human epidermal growth factor receptor 2(HER-2)in Xinjiang. Methods The rela-tionships between the expressions and clinical pathology and prognosis of 1,912 female breast cancer patients with HER-2A were retrospectively analysed. Results Distant metastasis rate,3-year overall survival(OS)and 3-year progression-free survival(PFS)in the HER-2 positive breast cancer patients were all significantly higher than in the HER-2 negative breast cancer patients(P<0.05).3-year OS in the patients with targeted therapy patients was higher than in those without targeted therapy among those HER-2 positive patients. Multivariate analysis revealed that HER-2,endocrine therapy,chemotherapy and targeted therapy were the independent prognostic factors of OS and PFS. Vessel tumor thrombus,tumor diameter,lymph node conditions were the independent prognostic factors of OS and race was the independent prognostic factor of PFS. Conclusion The main type of breast cancer in Xin-jiang is invasive ductal carcinoma,with a positive rate of HER-2 expression 30.9%.A younger age trend comes up in diagnosis.HER-2 status,endocrine therapy,chemotherapy and targeted therapy may provide important informa-tion for the prognosis of breast cancer.Race is the independent prognostic factor of PFS.

Early hemoperfusion in poisoned patients can remove poisons rapidly and effectively, which plays an important role in improving the prognosis of patients. The key of hemoperfusion therapy is the safe and effective anticoagulation. The local citrate anticoagulation effect acid is good, it also has little effect on the systemic coagulation mechanism and internal environment of patients, so it is worthy of promotion. We retrospectively analyzed the clinical data and treatment of 273 patients who were poisoned by citrate anticoagulant in the emergency intensive care unit of the Second Affiliated Hospital of Shandong First Medical University, aiming at perfusion of citrate anticoagulant in patients with poisoning. Provide a certain clinical reference.

Objective To observe the changes of serum clara cell protein?16 ( CC?16 ) and monocyte chemotaxis protein?1 (MCP?1) level in patients with acute respiratory distress syndrome (ARDS) and to explore their relationship with the disease severity and prognosis of ARDS??Methods One hundred and fourteen patients with ARDS who were admitted to Changzhi People′s hospital from January 2017 to March 2018 were selected as the subjects??They were divided into mild group ( n＝37),moderate group (n＝41) and severe group ( n＝36) according to the severity of ARDS??Sixty healthy persons in out?patient examination were selected as control group??The survival situation of patients in 4 weeks were recorded,the patients were divided into survival group ( n＝65) and death group ( n＝49) according to their survival situation??The age,gender,body mass index (BMI),smoking history,acute physiology and acute physiology and chronic health evaluation II ( APACHE II) score,sequential organ failure assessment ( SOFA) score, serum CC?16 and MCP?1 level were analyzed in each group??The relationship between serum CC?16,MCP?1 level and disease and prognosis of patients with ARDS were analyzed??Results With the increase of disease severity,APACHE II score, SOFA score and serum CC?16, MCP?1 level in patients with ARDS were significantly increased??The differences were statistically significant ( F＝1 216??886,1 339??247,290??879, 417??262; all P＝0??000)??The APACHE II score,SOFA score and serum CC?16,MCP?1 levels in the death group were (22??13± 2??47) scores,( 15??09 ± 1??97) scores,( 23??85 ± 4??27) μg／L, ( 36??64 ± 5??21) ng／L respectively,which were significantly higher than those in the survival group (18??25±2??35) scores,(13??23 ±2??03) scores,(17??34±4??13) μg／L,(27??93±4??88) ng／L,the differences were statistically significant (t＝8??538,4??905,8??211,9??146;all P＝0??000)??Pearson correlation analysis showed that there was a positive correlation between serum CC?16 level and MCP?1 level in patients with ARDS ( r＝0??589, P ＝0??000)??Meanwhile,the CC?16,MCP?1 were positive correlation with APACHE II score,SOFA score and mortality (CC?16:r＝0??504,0??549,0??472;P＝0??000,0??000,0??012;MCP?1:r＝0??493,0??528,0??435;P＝0??006, 0??000,0??025)??APACHE II score ( OR＝3??083,95%CI:0??025－1??364,P＜0??05),CC?16 ( OR＝5??403, 95%CI:0??011－6??561, P＜0??05) and MCP?1 ( OR＝2??892, 95%CI: 0??034－1??619, P＜0??05) were all closely related to ARDS death??CC?16 independent detection, MCP?1 independent detection and the two combined detection predicted the under?curve area, sensitivity and specificity of ARDS patients with in 4 weeks were 0??830, 82??35% and 72??16%; 0??719, 79??25% and 72??19%; 0??866, 85??06% and 80??72%respectively??Conclusion CC?16,MCP?1 are abnormally high expression in serum of patients with ARDS, and its levels are closely related to the severity and prognosis of patients with ARDS??CC?16 combined with MCP?1 detection has high diagnostic value for patients with ARDS,which can be used as an effective index to judge the disease and prognosis of patients with ARDS??

Objective:To evaluate the diagnostic and predictive value of ultrasonic cardiac output monitor (USCOM) in premature infants with hemodynamic significant patent ductus arteriosus (hsPDA).Methods:A total of 165 preterm infants with gestational age less than 34 weeks and within 72 hours after birth in the Neonatal Medical Center of Children′s Hospital of Nanjing Medical University from January 2018 to June 2020 were retrospectively analyzed.According to the echocardiograph (ECHO) results within 72 hours after birth, clinical manifestations and oral administration of Ibuprofen, premature infants were divided into non-patent ductus arteriosus (non-PDA group, 77 cases), non-hsPDA group (59 cases), and hsPDA group (29 cases). USCOM was performed within half of an hour after ECHO.During the course of oral medication of Ibuprofen in the hsPDA group, USCOM was repeatedly examined every 24 hours.ECHO and USCOM were re-examined within 24 hours after the course of oral medication of ibuprofen.Results:Compared with non-hsPDA group and non-PDA group, the gestational age [(31.51±1.62) weeks, (32.09±1.27) weeks vs.(30.82±1.61) weeks, F=8.425, P<0.001], birth weight [(1 154.49±192.55) g, (1 195.58±182.02) g vs.(1 094.66±153.69) g, F=3.366, P=0.037] and the mean blood pressure [(38.37±2.20) mmHg, (38.53±2.37) mmHg vs.(30.52±2.31) mmHg, 1 mmHg=0.133 kPa, F=142.860, P<0.001]were significantly lower in hsPDA group.On the contrary, the heart rate[(129.68±7.11) times/min, (130.34±7.27) times/min vs.(164.76±7.65) times/min, F=271.790, P<0.001], B-type natriuretic peptide[(203.76±108.68) ng/L, (152.43±54.24) ng/L vs.(3 385.31±856.26) ng/L, F=931.30, P<0.001] and left artrium/aorta (1.32±0.12, 1.29±0.09 vs.1.60±0.12, F=84.970, P<0.001)were significantly higher.Among the USCOM parameters, left ventricular cardiac output [(0.40±0.08) L/min, (0.40±0.08) L/min vs.(0.51±0.04) L/min, F=26.760, P<0.001], cardiac index (CI) [(3.76±0.48) L/(min·m 2), (3.54±0.30) L/(min·m 2) vs.(4.43±0.36) L/(min·m 2), F=56.060, P<0.001], stroke volume[(3.75±0.28) mL, (3.70±0.23) mL vs.(4.22±0.36)mL, F=40.170, P<0.001], stroke volume index [(34.42±2.66) mL/m 2, (34.47±3.29) mL/m 2vs.(38.45±3.32) mL/m 2, F=20.080, P<0.001], peak ejection velocity [(1.12±0.12) m/s, (1.11±0.10) m/s vs.(1.23±0.09) m/s, F=14.890, P<0.001] and corrected flow time [(379.02±22.69) ms, (376.51±27.95) ms vs.(403.69±39.04) ms, F=10.120, P<0.001]were significantly higher in hsPDA group, while systemic vascular resistance index (SVRI) [(1 109.49±115.67) ds·cm -5·m 2, (1 070.01±133.55) ds·cm -5·m 2vs.(861.31±115.22) ds cm -5m 2, F=41.130, P<0.001]was significantly lower than that of non-hsPDA and non-PDA group.The area under the receiver operating characteristic curve of CI and SVRI for predicting hsPDA were 0.916 and 0.905, respectively.The sensitivity and specificity of CI>4.05 L/(min·m 2) for predicting hsPDA was 0.828 and 0.860, respectively, which was 0.660 and 1.000 for SVRI<1 002.5 ds·cm -5·m 2.The sensitivity and specificity of combining CI and SVRI for predicting hsPDA was 0.966 and 0.949, respectively. Conclusions:USCOM has a good diagnostic and predictive value for hsPDA in premature infants.The combined application of CI and SVRI can improve the predictive value, and help formulate the early diagnostic and treatment strategy for PDA in premature infants