Objective To compare the number of endothelial progenitor cells (EPCs) from peripheral blood in patients with acute myocardial infarction of young man and healthy man.Methods Eighteen young men (18 ～50 years old) with acute myocardial infarction (AMI) who were admitted at the First Affiliated Hospital of Dalian Medical University from June 2010 to April 2011 in young man were enrolled,aged (65 ～ 85 years old) men with acute myocardial infarction in 18 cases,within 24 hours of onset collected blood 2 ml.Ten cases of healthy young men (30 ～50 years old) were used as control group,fasting venous blood 2 ml.A volume (400 μl) of blood was taken to red blood cell lysis buffer hemolysis labeled with vascular endothelial growth factor (VEGF),CD34,and CD133 antibodies,and then analyzed with flow cytometry.Results The number of EPCs in peripheral blood was measured in young male AMI group.The number of EPCs in peripheral blood was (0.58 ±0.83)％ in older men.The number of EPCs in peripheral blood of AMI group was (0.04 ± 0.03) ％.For healthy controls,the number of EPCs was (0.02 ± 0.02)％.The number of EPCs was significantly higher in AMI patients compared to control group (P ＜ 0.05).However,for AMI group,the increased number of EPCs in young men was significantly greater than young female (P ＜0.01).Conclusions The number of EPCs in peripheral blood in young man AMI patients is significantly increased within 24 hours.

Objective To study the expression of matrix metalloproteinase(MMP) in chronic obstructive pulmonary disease (COPD) and its clinical significance. Methods 36 Wistar rats were randomly divided into three groups : the normal group (A), the model group (B) and the medicine treatment group (C). Rats in group B and C were passively smoked for 75 days to establish COPD model. Group B were administered Vit A 15 mg/ kg before smoking. 75 days later,the rats were killed. Group A were killed 25 days after equal volume of saline was dripped in trachea. The pathological changes of lung tissue were observed in each group. The expression of MMP was determined by immunohistochemistry and ELISA. Result The enzymatic activity and the expression of MMP-2 and MMP-9 were reciprocally different as compared among the tree groups(P <0.01). Conclusion MMP expression is increased in impaired lung tissues of COPD rats.

Objective To explore the joint toxic effect of formaldehyde and benzene on testicles of the mice. Methods 78 Kunming male mice were divided into groups, in the formaldehyde treatment groups were exposed at dosage of 0.2 mg/kg,2 mg/kg,20 mg/kg, in the benzene treatment groups were exposed at dosage of 100.0 mg/kg,200.0 mg/kg,400.0 mg/kg and the in formaldehyde and benzene combined treatment groups were exposed at dosage of 0.1+50.0 mg/kg,1+100.0 mg/kg,10+200.0 mg/kg respectively. The treatments were conducted by peritoneal injection for five consecutive days,once a day,then killed on 6th day. The activity of superoxide dismutase(SOD),the contents of maleic dialdehyde(MDA),the contents of copper(Cu),zinc(Zn) in testicles of the mice were determined. Results Compared with those in the negative control groups,the activity of SOD and the contents of Cu, Zn in the testicles of the mice in each treatment group significantly decreased, while the contents of MDA significantly increased (P

Objective To study the effect of gallamine triethiodide (GT) on the increased afferent discharge from the muscle spindle caused by succinylcholine (SCh). Methods The nervous filaments of rats were separated from tibial nerve innervating the gastrocnemius muscle, and afferent discharge from the muscle spindle was recorded. SCh of a certain dose was injected after 4 minutes of injection of a certain dose of GT. The effect of suppression by GT on the increased afferent discharge from the muscle spindle caused by SCh was measured by counting the decrease in discharge peak frequency (DPF) and maximum increase frequency (MIF) and by counting the time of peak frequency (PF) appearing delayed than the controls. Results When the dose of SCh was 0.005mmol/kg, the dose of GT was 0.005mmol/kg, 0.010mmol/kg and 0.020mmol/kg, DPF reduced to 67.2%, 52.5% and 37.1% of the controls, respectively; MIF reduced to 61.4%, 40.2.% and 25.4%; PF appearing time delayed 43.9s, 64.3s and 80.4s than the controls. When the dose of GT was 0.005mmol/kg but the dose of SCh was 0.010mmol/kg, DPF and MIF reduced to 83.3% and 77.8% of the controls, respectively; PF appearing time delayed 22.5s than the controls. Conclusion GT has a remarkably suppressive effect on the increase in afferent discharge from the muscle spindle induced by SCh. The suppression of GT is dose-dependent, and the action of SCh and GT on muscle spindle is in competition.

Objective:To investigate the effects of fasting blood glucose levels on the quality of myocardial metabolism imaging via positron emission tomography/X-ray computed tomography(PET/CT)in patients with coronary heart disease.Methods:A total of 78 patients with coronary heart disease from 2019 to 2020 undergone 18-fluorine deoxyglucose( 18F-FDG)PET/CT myocardial imaging in Beijing Anzhen Hospital were retrospectively analyzed, with 64 patients meeting the inclusion criteria eventually enrolled in this study.All patients fasted over 8 hours and were injected with insulin and 18F-FDG following an oral glucose load.Then myocardial imaging evaluations were performed.Depending on whether the myocardial image quality(IQ)offered a match with clinical diagnosis, a score between 0-2 from the semiquantitative scoring system was defined as good IQ, while a score between 3-4 defined as poor IQ.Differences in sex, age, rate of diabetes, body mass index, fasting blood glucose(FBG), glycosylated hemoglobin, glycosylated serum albumin, triglycerides and free fatty acids, lipid-regulating drugs, and oral antidiabetic medications were analyzed between the good( n=55)and poor( n=19)image groups, and risk factors were examined. Results:The diabetes mellitus rate was higher in the poor group than in the good group(63.2% vs.33.3%, χ2=4.872, P=0.027). FBG, glycosylated hemoglobin and glycosylated serum albumin levels in the poor group were increased compared with the good group[7.67(6.02, 11.64)mmol/L vs.5.52(4.97, 6.37)mmol/L, 7.30(6.43, 8.70)% vs.6.20(5.60, 6.87)%, 19.8(15.1, 24.1)% vs.14.8(13.9, 16.8)%, U=-3.909, -2.419 and -3.042, P<0.001, P=0.016 and 0.002, respectively]. Multivariate Logistic regression analysis showed that FBG was an independent risk factor for poor imaging( OR=1.62, 95% CI: 1.19-2.20, P=0.002). The area under the receiver operator characteristic(ROC)curve for FBG was 0.811(95% CI: 0.69-0.93, P<0.001), and the cut-off value for FBG was 6.66 mmol/L. Conclusions:FBG is an independent risk factor for myocardial image quality.Patients with diabetes mellitus should rigorously control their blood glucose levels.

To identity the pathogen that causes the mosaic and yellowing symptoms on Atractylodes macrocephala Koidz in Jiangxian, Shanxi province, biological inoculation, sequence-independent amplification (SIA),RT-PCR and other identification methods were used. The results showed that the chlorotic and necrosis symptoms occurred in the indicator plant Chenopodium quinoa after it was infected with the pathogen,and the same symptoms appeared after the reinoculation of healthy Atractylodes macrocephala Koidz; this reflected that the disease was likely to be caused by a virus. The results of SIA and sequencing showed that Broad bean wilt virus 2 (BBWV2) was present in severely mosaic Atractylodes macrocephala Koidz leaves. To further characterize the BBWV2 isolate from Atractylodes macrocephala (BBWV2-Am), the polyprotein partial gene encoded by BBWV2-Am RNA2 was cloned and sequenced. Sequence alignments showed that the nucleotide sequence identity of BBWV2-Am SCP and LCP genes ranged from 79.3% to 87.2% and from 80.1% to 89.2% compared to other BBWV2 strains,respectively; the deduced amino acid sequence similarities of the two gene products ranged from 91.2% to 95.7% and from 89.44 to 95.5%, respectively,compared to those of other BBWV2 strains. Phylogenetic comparisons showed that BBWV2-Am was most likely to be related to BBWV2-Rg,but formed an independent branch. This is the first report of BBWV2 in Atractylodes macrocephala Koidz.
Amino Acid Sequence ; Atractylodes ; virology ; Fabavirus ; chemistry ; classification ; genetics ; isolation & purification ; Molecular Sequence Data ; Phylogeny ; Plant Diseases ; virology ; Sequence Analysis ; Viral Proteins ; chemistry ; genetics

BACKGROUND:5-Fluorouracil occupies an important position in the treatment of gastric cancer, but its long-term use can easily induce adverse reactions such as myelosuppression and leukopenia. Polylactic acid and its copolymers have a higher biocompatibility, and their decomposer cannot gather in the body.
OBJECTIVE:To investigate the in vitro cytotoxicity mechanism of 5-fluorouracil-loaded polylactic acid nanoparticles on gastric cancer cel lines.
METHODS:Ten mice were selected in this study. 5-fluorouracil-loaded polylactic acid nanoparticles (1×10-7, 1×10-6, 1×10-5, 1×10-4 mol/L) were prepared using ultrasonic emulsification method. Kiling effect of polylactic acid nanoparticles on gastric cancer cel lines in vitrowere detected. Then, the inhibition rate was calculated at different concentrations.
RESULTS AND CONCLUSIONS: Under the transmission electron microscope, 5-fluorouracil-loaded polylactic acid nanoparticles had good shape and relatively evenly distributed with no adhesions. After drug administration, the drug concentration was 50% at 24 hours and 62.9% at 72 hours. After 48 hours co-culture with single 5-fluorouracil or 5-fluorouracil-loaded polylactic acid nanoparticles, the viability of gastric cancer cels showed a decrease trend with the increase of drug concentrations, and moreover, 5-fluorouracil-loaded polylactic acid nanoparticles had a better cel inhibition ability than the single 5-fluorouracil (P < 0.05). The IC50value of 5-fluorouracil-loaded polylactic acid nanoparticles was significantly lower than that of 5-fluorouracil (P < 0.05). These findings indicate that polylactic acid nanoparticles as good drug carriers have a strong drug loading capacity and increase drug concentration in the body, but cannot reduce the biological activity of 5-fluorouracil, which provide new ideas for the treatment of gastric cancer.

Objective To investigate the situation of pre-pregnancy health check in rural areas of Sichuan province and get the key difficult points during the process of carrying out the work.Methods According to the economic situation in Sichuan province and geographic distribution,random eight areas in Sichuan province (Chengdu,Neijiang,Nanchong,Ziyang,Meishan,Zigong,Les-han and Suining),investigate pregnant women in maternal and child health care institutions and family planning service institutions at all all levels in the areas above.Results Only 334 people (33.26%)underwent the pre-pregnancy health check during the 974 pregnant women in rural areas.The rate of planned pregnancy is low;the rate of unintended pregnancy is close to 40.00%.55.29%of the planned pregnancy women didn′t undergo the pre-pregnancy health check.And the factors that affect their behavior of under-going pre-pregnancy health check are whether planned pregnancy and personal attitude towards pre-pregnancy health check.Conclu-sion The rate of pre-pregnancy health check is low in the pregnant women from rural areas of Sichuan province,the health sector needs to make efforts to promote and enhance the awareness of the rural pregnant women to prevent birth defects and the initiative in participation.

Aims To study single dose toxicity of poly-phenols effective parts from Punica granatum,to eval-uate their safety,and thus to provide a theoretical basis for drug development and clinical use.To observe their protective effect on ethanol-induced gastric ulcer in rats.Methods 50 healthy Kunming mice were ran-domly divided into five groups and given different doses of polyphenols’effective parts from Punica granatum via intragastric administration.Toxicity and death in each group of mice were observed and recorded after administration for 14 d.The median lethal dose was calculated by Bliss method.70 rats were randomly di-vided into normal group,model group(constant volume of normal saline),sanjiuweitai particles(1 850 mg· kg-1 )group,colloidal bismuth subcitrate (33 mg · kg-1 )group and polyphenols effective parts from Puni-ca granatum low-dose,medium-dose,high-dose(430, 852,1 704 mg·kg-1 )groups.On the 9th day of 10 days’gavage,all except the normal group were fed ethanol (1.5 mL/only)to induce gastric mucosal inju-ry in rats with acute gastric ulcer.Gastric ulcer index, the rate of ulcer inhibition were calculated for each group.The morphological changes of gastric mucosa were observed.The gastric mucosa levels of PGE2 , NO,SOD and MDA were determined.Results The LD50 and 95%confidence limit of the polyphenols’ef-fective parts from Punica granatum were 8 520.9 mg· kg-1 and 7 291.2 ~9 914.4 mg·kg-1,respectively. Pathology showed that the organs receiving dose of 16 000 mg · kg-1 had different degrees of damage . Compared with the model group,the extract from Puni-ca granatum significantly repaired the gastric mucosa, and significantly increased the gastric mucosa levels of NO and reduced MDA content,and improved SOD content and the levels of PGE2 .Conclousion The dose of 5 063 mg · kg-1 of polyphenols effective part from Punica granatum showed no death.The dose of 16 000 mg · kg-1 of polyphenols effective parts from Punica granatum could cause varying degrees of dam-age in heart,liver,lung,kidney or the death of mice. The LD50 and 95% confidence limit of the polyphenols effective parts from Punica granatum were 8 520.9 mg ·kg-1 and 7 291.2 ~9 914.4 mg·kg-1,respective-ly.The extract from Punica granatum plays a protective role against gastric mucosa damage induced by absolute ethanol,and the mechanism may be related to promo-ting ulcer epithelial cells synthesis,enhancing mucosal regeneration function,regulating NO content and en-hancing antioxidant capacity.

Objective To evaluate the influence of age factors on etomidate sedative potency.Methods One hundred and fifty (ASA physical status Ⅰ or Ⅱ) patients of both sexes,scheduled for elective operation under general anesthesia,were divided into 3 groups according to age (n =50 each):group Y 18-44 yr,group M 40-64 yr and group O 65-75 yr.Each group was randomly divided into 5 subgroups receiving in'venous etomidate 0.07,0.09,0.11,0.13 and 0.17 mg/kg,respectively.Loss of consciousness was evaluated depending on loss of eyelash reflex within 5 min after intravenous administration.Results ED50 of etomidate inducing loss of consciousness was 0.13,0.11 and 0.09 mg/kg in group Y,M and O,respectively.Compared with that in group Y,ED50 was significantly decreased in group O,however,and showed no significant change in group M.Conclusion Age factors can affect sedative potency of etomidate,which appears greater in the elderly patients.