Objective To evaluate the role of by NO in reduction of myocardial ischemia-reperfusion (IR)injury by ginsenoside Rb1 preconditioning in diabetic rats. Methods Forty healthy adult male SD rats weighing 220-280 g were used in this study. Diabetes mellitus was induced by intraperitoneal streptozotocin 65 mg/kg and confirmed by fasting blood glucose ＞ 16.7 mmol/L. The animals were randomly divided into 4 groups ( n = 10each): sham operation group (group S), group IR, ginsenoside Rb1 group (group R) and L-NAME + ginsenoside Rb1 group (group LR). IR was produced by occlusion of the anterior descending branch of left coronary artery (LAD) for 30 min followed by 120 min reperfusion in group IR, R and LR. In group S, LAD was exposed but not occluded. In group LR, L-NAME 10 mg/kg was injected iv 25 min before ischemia. In group R and LR, ginsenoside Rb1 40 mg/kg was injected iv 10 min before ischemia. In group S and IR, eaqual volume of normal saline was injected instead of ginsenoside Rb1. The blood sample was taken from carotid artery at 120 min of reperfusion for determination of serum activities of creatine kinase (CK) and lactate dehydrogenase (LDH). Then the animals were sacrificed and myocadial tissues were obtained for determination of infarct size, endothelial nitric oxide synthase (eNOS) expression, MDA and NO contents, SOD activity and microscopic examination. Results The serum activities of CK and LDH were significantly increased and the myocardial infarct size was enlarged in group IR, R and LR, and eNOS expression was significantly down-regulated, MDA content was increased, and SOD activity and NO content was significantly decreased in group IR and LR compared with group S ( P ＜ 0.05). The serum activities of CK and LDH, and MDA content were significantly decreased, the myocardial infarct size was reduced, the expression of eNOS was up-regulated and the activity of SOD was increased in group R compared with group IR and LR ( P ＜ 0.05). There was no significant difference in the indices mentioned above between group IR and LR ( P＞ 0.05). Conclusion Ginsenoside Rb1 preconditioning can attenuate myocardial IR injury in diabetic rats via activation of eNOS, increase in NO production, and inhibition of the lipid peroxidation reaction.

Objective To evaluate the outcome of patients with low ejection fraction undergoing coronary artery bypass grafting.Methods One hundred and twenty-eight consecutive patients with left ventricular ejection fraction (LVEF) ≤35％,who underwent Off-pump caronary bypass surgery or Cardiopulmonary coronary artery bypass between December 2000 and Novomber 2010 were studied.The outcome of early complication,mortality,LVEF were analyzed.Results LVEF and LVEDD were significantly increased in early postoperation (P ＜ 0.05 ).Use of Intra-aotric balloon counterpulsation(IABP) can decrease early mortality,and postopertive respiratory tract infections,renal insufficiency were found to be the main complications.Conclusions Preoperative low ejection fraction has no relationship with postoperative early mortality.using medicine to adjust heart function,strcity control blood pressure,blood glucose,heart rate preoperation,positive use of IABP postoperativon are key point to decrease early mortality.

Objective To evaluate the outcome of patients using intra-aortic balloon pump IABP undergoing coronary artery bypass grafting and to assess the results.Methods From December 2001 to December 2011,eighty-two consecutive patients,who used IABP undergoing coronary artery bypass grafting were studied.The out-come of early complication,mortality,LVEF were analyzed.Results Fourteen patients died.Forty-three patients,who used IABP,no serious complications (malignant arrhythmia,renal insufficience),preoperative LVEF was (46.0 ± 1.8) ％,LVEDD was (66.0 ± 4.1) mm,early postoperative LVEF was (50.0 ± 2.7) ％,LVEDD was (53.0 ± 2.8) mm (P ＜ 0.05).Conclusion Use of IABP decreased early mortality,and postopertive respiratory tract infections,renal insufficiency were the main complication.Positive use of IABP postoperatively can decrease early mortality.

Objective To study the effect of different iodine nutrition on thyroid function in adult and pregnant women.Methods A random sampling method was used to select healthy adult and pregnant woman from the communities of coastal city,coastal rural and inland rural areas in Liaoning Province.Drinking water,urine and salt samples were collected to measured urinary iodine (U I),salt iodine (SI) and water iodine content.Fasting venous blood was collected to measured thyroid stimulate hormone (TSH),freethyroxine (FT4),free triiodothyronine (FT3),thyroglobulin antibody (TgAb) and thyroid peroxidase antibody (TPOAb) with the method of immunoassay chemical luminescence.Results A total of 150 salt samples were collected,means of SI was (30.1 ± 6.0)mg/kg.A total of 72 pregnant woman and 271 adults were investigated in iodized salt supplied regions.median UI of pregnant woman and adults were 176.3,203.2 μg/L.Iodine nutrition of pregnant women and coastal region adults was in an adequate level.Means of SI of inland adults(244.4 μg/L) was higher than appropriate level but not reached the excessive level.FT4 of the adults (11.7 pmol/L) and pregnant women (10.7 pmol/L) in inland regions were slightly higher than that of coastal city,rural adults(11.2,8.6 pmol/L) and pregnant women (10.9,9.6 pmol/L).TSH,FT3 and FT4 were not statistically different between regions (all P ＜ 0.05).But UI,FT4 and FT3 levels of pregnant women(176.3 μg/L,9.5 pmol/L,4.3 pmol/L) were significantly lower than that of the adults(203.2 pμg/L,11.3 pmol/L,4.7 pmol/L,all P ＜ 0.05).Hypothyroxinemia(4.4％,10/173) was higher than that of the inland adults (2.0％,2/98,P ＜ 0.05).And all hypothyroxinemia were found in women of childbearing age.Hypothyroxinemia prevalence of pregnant women(16.7％,12/72) was higher than that of adults(4.4％,12/271,P ＜ 0.05),The prevalence of hypothyroidism,hyperthyroidism and subclinical hyperthyroidism between the 3 regions adults and pregnant women were not statistically different (all P ＞ 0.05).Conclusions Under appropriate supply conditions of iodized salt,iodine nutrition and thyroid function are closely related.Pregnant women and women of childbearing age are at risk of iodine deficiency.The thyroid function of these people should be strengthen detect.

Objective:To evaluate the efficacy of remimazolam-propofol-sufentanil for anesthesia in patients undergoing painless gastroscopy.Methods:Eighty American Society of Anesthesiologists physical statusⅠor Ⅱ patients, aged 20-59 yr, weighing 44-69 kg, scheduled for elective painless gastroscopy, were divided into 2 groups ( n=40 each) using a random number table method: remimazolam-propofol-sufentanil group (group RPS) and propofol-sufentanil group (group PS). The patients in group RPS received successive intravenous injection of sufentanil 0.1 μg/kg, remimazolam 0.15 mg/kg and propofol (at a rate of 4 mg/s). The patients in group PS received intravenous injection of sufentanil 0.1 μg/kg and propofol (at a rate of 4 mg/s). When Observer′ s Assessment of Alertness/Sedation Scale score was 0, gastroscopy was performed.The consumption of propofol, time of anesthesia, time for gastroscopy, emergence time and discharge time were recorded.The number of intraoperative assisted respiration cases, body movement and occurrence of adverse reactions at the time of discharge were observed. Results:Compared with group PS, the consumption of propofol was significantly decreased, and the time of anesthesia, emergence time and discharge time were shortened in group RPS ( P<0.05). There was no significant difference in the time for gastroscopy, the number of intraoperative assisted respiration cases, body movement and the occurrence of adverse reactions at discharge time between the 2 groups ( P>0.05). Conclusion:Remimazolam-propofol-sufentanil produces better efficacy for anesthesia than propofol-sufentanil in patients undergoing painless gastroscopy.

Objective To study the anti-tumor effects of humulon on arylamine N-acetyltransferase-1(NAT1)activity.Methods Employing HPLC,using PABA as substrate,in intact SGC-7901 cells and their cytoplasm,making PABA being acetylated to Ac-PABA by NAT1 as the activity of NAT1.Reverse transcriptase polymerase chain reaction(RT-PCR)assay was used to study the expression of the NAT1 mRNA.Results The results show that humulon could inhibit the production of Ac-PABA in intact SGC-7901 cell and the cytoplasm,the production of Ac-PABA was gradually increased with the interaction time increasing.But comparing with corresponding negative control group's,the production of Ac-PABA was decreased evidently and the humulone could inhibit the expression of NAT1 mRNA.Conclusion Humulon could prevent the occurrence and deterioration of cancer.Its mechanisms can be attributed to its effect on decreasing the production of acetylation of carcinogenic aromatic amines,which is acetylated from aromatic amines,and inhibiting the NAT1 activity and expression of NAT1 mRNA.

Objective To explore the effects of humulon on kinetic parameters of N-acetyltransferase-1(NAT1) of human gastric cancer SGC-7901.Methods Employing HPLC,using para-aminobenzoic acid(PABA) as substrate,in intact SGC-7901 cells and their cytoplasm,taking the speed of PABA being acetylated to Ac-PABA by NAT1 as the rate of NAT1,using double reciprocal plot,taking the reciprocal of concentration of PABA and reaction rate of NAT1 as coordinates,regression equation was obtainied and the Michaelis constant(Km) and maximum reaction velocity(Vmax) were calculated.Results Study on enzyme kinetics demonstrated,as for intact SGC-7901 cells,Km and Vmax of control group were(3.910?0.087) ?mol/L and(0.306 0?0.006 7) pmol/L(1?106 cells),respectively,Km and Vmax of the humulon group were(3.830?0.123) ?mol/L and(0.275 0?0.005 8) pmol(1?106 cells),respectively.As for the cytoplasm of SGC-7901 cells,Km and Vmax of control group were(760.2?210.2) ?mol/L and(0.191 0?0.043 7) pmol/(mg?min),Km and Vmax of the humulon group were(449.0?72.9) ?mol/L and(0.094 0?0.010 4) pmol/(mg?min).Statistically,as for intact SGC-7901 cells or their cytoplasm,there was no difference of the Km between control group and humulon group,but there was remarkable difference of Vmax between control group and humulon group,P

Ranpirnase (onconase, ONC) is a new drug, with weak RNase activity and strong cytotoxicity to various tumor cells in vitro and in vivo. This study is to obtain recombination onconase (rONC) with high bioactivity. Based on the codon preference of Pichia pastoris, we designed and synthesized the gene according to cDNA sequences of ONC and the α mating factor's prepeptide. We screened positive clones after transforming the recombination plasmids into P. pastoris X-33, GSS115 and SMD1168. We screened the best combination of seven different vectors and host strains. Moreover, we optimized culture condition in shake flasks and 10 L bioreactor, and purified rONC from the supernatant after inducing it with 0.25% methanol by aqueous two-phase extraction coupling G50 molecular exclusion method. The highest rONC production was 13 mg/L in pPICZα-A/X-33/ONC combination under the condition of pH 5.5 and 23 degrees C in shake flasks for 7 d; and that the highest rONC production was 180 mg/L when the induction is performed in the lower basic salt medium with pH 5.5 in the 10 L bioreactor for 7 d. The yield of rONC is more than 90% at a purity of above 95%. rONC can kill various tumor cells in vitro. The expression and purification of rONC would be useful for further investigation of this new drug.
Antineoplastic Agents ; metabolism ; Bioreactors ; Cell Line, Tumor ; Codon ; DNA, Complementary ; Genetic Vectors ; Humans ; Pichia ; metabolism ; Recombinant Proteins ; biosynthesis ; Ribonucleases ; biosynthesis

Objective To compare and analyze the gene mutation of EGFR of bronchoalveolar lavage fluid(BALF)exosome,serum and lung cancer tissue specimens of patients with advanced non-small cell lung cancer(NSCLC)and assess whether the BALF exosome specimens are suitable for screening before clinical targeted therapy,to provide new ideas and screening methods for early individualized treatment of advanced NSCLC patients.Methods BALF exosomes,serum and lung cancer tissue specimens EGFR gene mutations of 78 cases with advanced NSCLC were detected by using amplification refractory mutation system(ARMS)method in Department of Respiratory and Critical Care Medicine in our hospital from May 2021 to May 2023,and the results were retrospec-tively analyzed.A comparative analysis of the specimens was conducted using lung cancer tissue specimens as bench-marks.Results A total of 33,25 and 38 cases of EGFR gene mutation and 42,53 and 40 cases of EGFR wild type were detected in BALF exosomes,serum and lung cancer tissues specimens respectively.The mutation rate of EGFR gene was 42.3%(33/78,32.1%(25/78)and 48.7%(38/78)in BALF exosomes,serum and lung cancer tissues specimens respectively.EGFR detection showed no results in 3 cases and the false-negative rate was 6.4%(5/78)in BALF specimen,and false-negative rate was 16.7%(13/78)in serum.The detection coincidence rate of EGFR mutation was 86.8%(33/38)in BALF exosomes specimen,and 65.8%(25/38)in serum.Conclusions EGFR gene mutation rate in BALF exosome specimen is consistent with that in serum and lung cancer tissue samples,showing no statistical significance(P>0.05).It is superior to serum specimen and suitable for patient screening before targeted therapy and provides new ideas and screening methods for early individualized treatment decisions of advanced NSCLC patients.

Purpose/Significance To expound the development of the application of new generation intelligent technologies in the medi-cal field in China,and to provide ideas for the future development of intelligent medical technologies in China.Method/Process Literature related to the application of medical intelligence technology from 2000 to 2023 is searched and screened on CNKI,and the knowledge graph is drawn by descriptive statistical analysis and CiteSpace software for visualization analysis.Result/Conclusion The number of papers pub-lished in the application research field of domestic medical intelligence technology shows a trend of steady growth and then leveling off.The hot keywords mainly include smart medical care,health care,health management,etc.,forming 8 main cluster sets.Future research should strengthen cooperation and exchanges between researchers and organizations,and pay more attention to the challenges posed by the applica-tion of technology in terms of security and privacy,technology supervision,talent team construction and technological energy consumption.