Objective: To provide a scientific standard of left ventricular Tei index for healthy people from various region of China, and to lay a reliable foundation for the evaluation of left ventricular diastolic and systolic function. Methods: The correlation and principal component analysis were used to explore the left ventricular Tei index, which based on the data of 3 562 samples from 50 regions of China by means of literature retrieval. hTe nine geographical factors were longitude(X1), latitude(X2), altitude(X3), annual sunshine hours (X4), the annual average temperature (X5), annual average relative humidity (X6), annual precipitation (X7), annual temperature range (X8) and annual average wind speed (X9). ArcGIS sotfware was applied to calculate the spatial distribution regularities of letf ventricular Tei index. Results: hTere is a signiifcant correlation between the healthy people’s letf ventricular Tei index and geographical factors, and the correlationcoeffcients were 0.107 (r1), 0.301 (r2), 0.029 (r3), 0.277 (r4),?0.256(r5),?0.289(r6),?0.320(r7), 0.310 (r8) and 0.117 (r9), respectively. A linear equation between the Tei index and the geographical factor was obtained by regression analysis based on the three extracting principal components. hTe geographical distribution tendency chart for healthy people’s letf Tei index was iftted out by the ArcGIS spatial interpolation analysis. Conclusion: hTe geographical distribution for letf ventricular Tei index in China follows certain pattern. hTe reference value in North is higher than that in South, while the value in East is higher than that in West.

Objective To measure the learning passion of medical students and evaluating its in-fluencing factors. Methods Taking 879 medical students as research subjects to conduct a questionnaire survey according to specialty and grade stratified sampling. The questionnaire contained two parts, includ-ing learning passion scale and general situation questionnaire. The effective recovery rate was 69.28%, 609 valid questionnaires were recovered. SPSS 22.0 and AMOS 21.0 software were used for statistical analysis of data, analyzing the reliability and validity of the questionnaire with internal consistency reliability coeffi-cient and confirmatory factor analysis. The factors of learning passion of medical students were analyzed by logistic regression analysis. Results The questionnaire of learning passion of medical students contained 12 measurement items, including 2 dimensions: harmonious passion and obsessive passion. The questionnaire was of fine reliability (Cronbach's Alpha=0.916) and validity (χ2/df=3.401,RMSEA=0.073,GFI=0.958). The
learning passion of medical students was at upper middle level (4.390±0.934). The influence of achievement level (OR=1.691, 95%CI=1.415 to 2.021), school satisfaction (OR=0.586, 95%CI=0.402 to 0.854) and profession plan (short-term plan OR=2.121, 95%CI=1.310 to 3.434;long-term plan OR=3.822,95%CI=1.972 to 7.405) on learning passion were statistically significant. Conclusion The questionnaire of learning pas-sion of medical students has fine reliability and validity. Achievement level, school satisfaction and profes-sion plan are factors affecting the learning passion of medical students.

OBJECTIVETo explore the possibility of clinical evaluation of cardiac function by CHM T3002 non-invasive hemodynamic monitor.

METHODSA total of 26 patients admitted to Zhongshan Hospital in Shanghai were enrolled, including 11 cardiac insufficiency patients and 15 control. Each subject was tested by non-invasive cardiac hemodynamic monitor immediately after echocardiography. Linear regression analysis and Bland-Altman consistency analysis were used in the analysis of relevance and consistency between two different methods.

RESULTSLinear correlation was shown on LVEF, SV, SVI, CO, CI, EDV, LVET and PEP/LVET, but not on PEP, between the two methods. Moreover, the consistency of the two methods was highly confirmed on LVEF and LVET, less on SV, SVI, CO, CI and EDV, while awfully weak on PEP and PEP/LVET.

CONCLUSIONCHM T3002 non-invasive hemodynamic monitor may be useful in assessing patients' cardiac function, however, it can not replace cardiac echocardiography.

Adult ; Aged ; Case-Control Studies ; Echocardiography ; instrumentation ; Equipment Design ; Female ; Hemodynamics ; Humans ; Male ; Middle Aged ; Monitoring, Physiologic ; instrumentation

OBJECTIVETo investigate the feasibility that transforming growth factor-beta1 (TGF-beta1) -loaded fibrin sealant (FS) promotes bone marrow mesenchymal stem cells (BMSCs) to create tissue engineering cartilage in vivo.

METHODSThe BMSCs were isolated from healthy human and amplified in vitro, and then induced by defined medium containing TGF-beta1 and dexamethasone. After 7 days the induced BMSCs were collected and mixed with TGF-beta1-loaded FS or FS as BMSCs+ FS-TGF-beta1 group and BMSCs+ FS experimental group. Then the mixture was injected by a needle into the dorsum of nude mice. In control group, only FS or BMSCs were injected. The tissue engineering specimens were harvested from nude mice 12 weeks later. Gross observation, average wet weight measurement, glycosaminoglycan (GAG) quantification, histology and immunohistochemistry were used to evaluate the results.

RESULTSThe BMSCs have possessed the shape and functional characters of chondrocyte when transferred to a defined medium. After injection of the mixture, the cartilage-like tissue were formed in two experimental groups. Compared with BMSC+ FS group, the specimens of BMSCs +FS-TGF-beta1 group were larger and firmer. Alcian staining showed better metachromatic matrix formation. The GAG contents were significantly higher. Immunohistochemical staining of collagen type II was stronger. However, no cartilage-like tissue was formed in two control groups.

CONCLUSIONTGF-beta1-loaded FS can promote BMSCs to contract injectable tissue engineering cartilage in vivo.

Animals ; Biocompatible Materials ; Cell Differentiation ; drug effects ; Cells, Cultured ; Chondrogenesis ; drug effects ; Dexamethasone ; pharmacology ; Fibrin Tissue Adhesive ; Humans ; Mesenchymal Stromal Cells ; cytology ; drug effects ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Tissue Engineering ; methods ; Transforming Growth Factor beta ; pharmacology

OBJECTIVETo investigate the effect of isoflurane, sevoflurane and desflurane on the expression of ICAM-1 and VCAM-1 in LPS-induced rat lung microvascular endothelial cells (RLMVECs).

METHODSCultured LPS-treated RLMVECs were exposed to 0.7, 1.0 or 2.0 minimum alveolar concentration (MAC) iosoflurane, sevoflurane or desflurane in 6 h. The protein expression of ICAM-1 and VCAM-1 was determined by Western blot analysis. The expression of ICAM-1 mRNA was detected by reverse-transcription polymerase chain reaction (RT-PCR).

RESULTIsoflurane at concentration of 1.0 MAC up-regulated the expression of ICAM-1 in LPS-induced RLMVECs (P <0.05); while same concentrations of sevoflurane and desflurane down-regulated the expression of ICAM-1 (P<0.05). Desflurane at concentration of 2.0 MAC up-regulated the expression of ICAM-1 in non-LPS-induced RLMVECs. All the volatile anesthetics down-regulated the expression of VCAM-1 in a dose-dependent manner.

CONCLUSIONCompared to isoflurane, 1.0 MAC sevoflurane and desflurane down-regulate the expression of ICAM-1, which may be the molecule mechanism of their protective effect in acute lung injury.

Anesthetics, Inhalation ; administration & dosage ; pharmacology ; Animals ; Cells, Cultured ; Endothelial Cells ; drug effects ; metabolism ; Endothelium, Vascular ; cytology ; Intercellular Adhesion Molecule-1 ; metabolism ; Isoflurane ; administration & dosage ; analogs & derivatives ; pharmacology ; Lipopolysaccharides ; pharmacology ; Lung ; blood supply ; Methyl Ethers ; administration & dosage ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Vascular Cell Adhesion Molecule-1 ; metabolism

Objective To compare the effects of three different methods for extracting short RNA-DNA hybrids, including the TRI reagent method , the phenol saturated with water method and the phenol saturated with Tris buffer method in order to facilitate studies on the biological function of RNA-DNA hybrids .Methods Short RNA fragments modifiedwith FAM at the 5′end and those modified with Cy 5 at the 5′end were synthesized .RNA and DNA fragments were annealed to form RNA-DNA hybrids.They were extracted with the above-mentioned 3 methods respectively .The extracted products were analyzed with electrophoresis .Results and Conclusion Short RNA-DNA hybrids can be extracted by the phenol saturated with water method and by the phenol saturated with Tris buffer method .The results can help study the function of short RNA-DNA hybrids .

Objective To reveal the mechanisms of immunological infertility,the method of coimmunoprecipitation(CO-IP) and liquid chromatogram mass/mass (LC-MS/MS) was used to screen sperm membrane proteins which interacting with antisperm antibodies (ASA).Methods This study was designed as a case-control.The disease group including 56 serum samples from 521 cryptogenic infertile patients were screened ASA positive by ELISA and conformed with mixed antiglobulin reaction(MAR).The controls were 31 serum samples which ASA is negative and already possessed healthy offspring.All subjects were enrolled from September 2015 to December 2015 in China PLA General Hospital.Spermatozoa samples from 48donors with normal sperm parameters were from January 2016 to April 2016 in China PLA General Hospital.The purified human sperm membrane proteins were then mixed with serum from disease group (positive for ASA) and control group (not containing ASA).The binding proteins of antisperm antibodies were enriched using CO-IP assay.The immunoprecipitates were separated on sodium dodecyl sulfate-polyactylamide gel (SDS-PAGE),then the binding proteins were cut from the gel and analyzed by LC-MS/MS after the enzymolysis.These proteins could bc idcntified as definition,biological function (s) and subccllular localization with Uniprot database.Results The serum samples from infertile persons (39 females and 17males) were screened ASA positive by ELISA and conformed with MAR.The healthy controls (17 females and 14 males) were ASA-negative in ELISA.Forty proteins that interact with ASA were obtained from the study and these could be divided into three groups:11 antigens detected by control serum samples only,14antigens recognised by both infertile patients and control sera,and 15 antigens specific for patients with ASA.These 15 proteins are Sperm Cation channcl protein 1,Sperm Cation channel protein 3,Sperm Cation channel protein 4,Sperm associated antigen 9,Apolipoprotein A-I,Dynein heavy chain 14,Cylicin-2,Izumo sperm-egg fusion protein 4,Thioredoxin domain-containing protein 2,IQ domain-containing protein H,IQ domain-containing protein F1,Spermatogenesis-associated protein 5,Spermatogenesis-associated protein 5-like protein 1,Sperm acrosome membrane-associated protein 1,E3 ubiquitin-protein ligase RNF 114.Conclusion Fifteen proteins discovered with CO-IP technology and LC-MS/MS analysis could be referred as male immunoinfertility-related antigens and they may hold the great importance in revealing the secret of immunological infertility.

OBJECTIVETo observe the expression of extracellular matrix metalloproteinase inducer (EMMPRIN) in the unstable plaque of patients with acute coronary syndrome (ACS), and the impact of leukotriene B4 (LTB4) on the EMMPRIN expression in macrophages.

METHODSThe EMMPRIN expression was detected by immunohistochemistry in 11 unstable plaques from patients with ACS. Protein expression of EMMPRIN was evaluated by Western blot on macrophages differentiated from THP-1 which were stimulated with LTB4 in the absence or presence of LTB4 antagonist U75302. There are 8 study groups: 1-THP-1, 2-8-the macrophages derived from THP-1, 2-6-macrophages were stimulated by LTB4 (0, 10(-10), 10(-9), 10(-8) and 10(-7) mol/L) for 24 h, 7-8-the macrophages were pretreated by 10(-6) mol/L or 10(-7) mol/L U75302 2 h before the LTB4 (10(-7) mol/L) stimulation.

RESULTSAbundant EMMPRIN expression was detected in macrophages and smooth muscle cells of unstable plaques from ACS patients. As to the THP-1 derived macrophages, EMMPRIN expression was significantly upregulated in a concentration-dependent manner in LTB4 stimulated groups, which was significantly higher in group 3-6 than in the THP-1 group (group 1) and macrophages group (group 2) (all P < 0.05) and pretreatment with U75302 significantly reduced the LTB4 induced upregulation of EMMPRIN in a dose-dependent manner (P < 0.05).

CONCLUSIONEMMPRIN expression is enhanced in macrophages and smooth muscle cells on unstable coronary artery plaques from ACS patients. LTB4 could stimulate EMMPRIN expression on THP-1 derived macrophages suggesting that LTB4 and EMMPRIN might be both involved in the formation and progression of unstable plaques, future studies are warranted to explore if LTB4 and EMMPRIN antagonists are effective or not for treating patients with ACS.

Acute Coronary Syndrome ; metabolism ; pathology ; Basigin ; metabolism ; Cell Line ; Humans ; Leukotriene B4 ; metabolism ; pharmacology ; Macrophages ; drug effects ; metabolism ; Myocytes, Smooth Muscle ; drug effects ; metabolism ; Plaque, Atherosclerotic ; metabolism

·AIM: To early massage lacrimal sac to prevent and reduce the neonatal dacryocystitis. ·METHODS: We collected 4048 cases of neonatal, there were 2650 cases of natural birth including 5300 eyes and 1398 cases of Cesarean section including 2796 eyes. There were 2131 cases with preventive massage on lacrimal sac including 1396 cases in natural labor,2792 eyes, and 735 cases in cesarean delivery, 1470 eyes. Then, we determined whether neonatal dacryocystitis occurrence in the observation period. ·RESULTS: After preventive massage on lacrimal sac, there were 104 cases of neonatal dacryocystitis that included 68 cases of natural labor,75 eyes and 36 cases of cesarean delivery, 47 eyes; 140 cases of neonatal dacryocystitis that included 49 cases of natural labor, 57 eyes and 91 cases of cesarean delivery, 148 eyes, in the neonatal without massage. In the comparison of preventive massage group with control group,there were significant differences of the incidence of neonatal dacryocystitis(χ2=32.141,P<0.01). ·CONCLUSION: The preventative massage on lacrimal sac significantly reduce the incidence of neonatal dacryocystitis.

OBJECTIVETo investigate the relationship between arterial stiffness and pre-diabetes when assessed by the new glycosylated hemoglobin A1c (HbA1c) 5.7%-6.4% criterion or by impaired fasting glucose in middle aged Chinese.

METHODS1122 adults aged 55 years or younger in the health examination centers for physical check-ups were enrolled in the two large-sized Tertiary Comprehensive Hospitals in Beijing from June 2011 to June 2012 after excluding those who previously had been diagnosed or treated as diabetes or cardiovascular disease. Subjects with a diagnosis of pre-diabetes according to impaired fasting glucose (IFG) (fasting plasma glucose (FPG) levels at 5.6-6.9 mmol/L), HbA1c levels at 5.7%-6.4%, or both, were classified into four groups for observation: (1) Normoglycaemia (HbA1c<5.7% and FPG <5.6 mmol/L); (2) IFG alone (FPG levels at 5.6-6.9 mmol/L and HbA1c<5.7% ); (3) HbA1c 5.7%-6.4% alone (HbA1c levels at 5.7%-6.4% and FPG <5.6 mmol/L); and (4) both HbA1c 5.7%-6.4% and IFG (HbA1c levels at 5.7%-6.4% and FPG levels at 5.6-6.9 mmol/L). All subjects were measured for weight, height, waist circumference, blood pressure, fasting plasma glucose, HbA1c, lipid profile and brachial-ankle pulse wave velocity (baPWV).

RESULTSThe mean values of baPWV were 1282±8, 1311±10, 1398±30, and 1418±27 cm/s (Mean±SE) in Normoglycaemia, HbA1c 5.7%-6.4% alone, IFG alone and the both HbA1c 5.7%-6.4% and IFG groups, respectively. After adjusting for age, gender, blood pressure, BMI and triglyceride, baPWV was significantly higher in subjects with both HbA1c 5.7%-6.4% and IFG compared among the subjects with Normoglycaemia (1350±14 vs. 1301±6 cm/s, P=0.002) and HbA1c 5.7%-6.4% alone (1350±14 vs. 1309±8 cm/s, P=0.013).

CONCLUSIONSubjects with pre-diabetes exhibited a greater arterial stiffness.

Adult ; Asian Continental Ancestry Group ; Atherosclerosis ; etiology ; Blood Glucose ; metabolism ; China ; Female ; Glycated Hemoglobin A ; metabolism ; Humans ; Male ; Middle Aged ; Prediabetic State ; blood ; complications ; physiopathology ; Pulse Wave Analysis ; Vascular Stiffness