Objective To select the indexes of forensic identification in digital orthopantomogram and formulate the full dentition pattern code.Methods To collect randomly 620 samples with dental interventions and 150 samples with dental pathological changes but without therapy.Then to observe and compare them respectively,select indexes for full dentition patterns according to the dental physiological variations,pathological changes and interventions Finally the diversity of the full dentition patterns in two groups would be evaluated by statistical analysis.Results The group with dental interventions had 619 kinds of dental pattern in 620 samples,its diversity of full dentition patterns was 99.84%.The group with dental pathological changes but without therapy had 146 kinds of dental pattern in 150 samples,thus its diversity of full dentition patterns was 97.33%.Conclusion These full dentition pattern indexes were valuable in the forensic identification of persons with abnormal teeth.

Objective To evaluate the role of δ receptor in reduction of hypoxia-reoxygenation (H/R) injury to cardiomyocytes by morphine preconditioning in rats with chronic heart failure.Methods Adult male Sprauge-Dawley rats weighing 220-250 g were used in the study.Chronic heart failure was induced by injection of adriamycin 2 mg/kg via the tail vein once a week for 6 weeks.Their hearts were removed 2 weeks after the last injection and the cardiomyocytes were isolated and cultured.The cells were randomly divided into 5 groups ( n =8 each):control group (group C); H/R group; morphine preconditioning group (group MPC); morphine preconditioning + naloxone (opioid receptor antagonist ) group (group MPC + Naloxone) ; morphine preconditioning + naltrindole ( δ receptor antagonist) group ( MPC + Naltrindole group).The cells were cultured in normal culture atmosphere in group C and were exposed in hypoxic air for 3 h followed by 1 h reoxygenation in the other groups.Morphine preconditioning was performed immediately before hypoxia in group MPC.Naloxone and naltrindole were added before morphine preconditioning in groups MPC + Naloxone and MPC + Natrindole respectively.At 1 h of reoxygenation,the cell viability ( by MTT assay),activities of lactate dehydrogenase ( LDH ) and creatine kinase (CK),and cell apoptosis were detected.The apoptotic rate was calculated.Results The cell viability was significantly lower,and the activities of LDH and CK and apoptotic rate were significantly higher in groups H/R,MPC + Naloxone and MPC + Natrindole than in group C (P ＜ 0.05).The cell viability was significantly higher,and the activities of LDH and CK and apoptotic rate were significantly lower in group MPC than in group H/R ( P ＜ 0.05).Conclusion Morphine preconditioning reduces H/R injury to cardiomyocytes through activating δ receptor in rats with chronic heart failure.

Objective To investigate the pregnancy opportunity and outcome of patients with sysmetic lupus erythematosus (SLE).Methods We carried out a retrospective analysis of the clinical information of patients who suffered from SLE complicated with pregnancy and were hospitalized to People's Hospital of Peking University from December of 1992 to February of 2012.Chi-square test were used for statistical analysis.Results Forty-nine cases of patients with SLE complicated with pregnancy had 52 pregnancies in total.In 27 cases of planned pregnancies,24 cases(89％ )resulted in live births and 5 cases( 18％ ) had flares during pregnancy.Of the 24 live births,3 cases( 12％)were premature deliveries and 4 cases(17％) had low birth weight infants.In 25 cases of unplanned pregnancies,12 cases (48％) resulted in live births and 20 cases (80％) had flares during pregnancy.Of the 12 live births,6 cases(50％ ) were premature deliveries and 6 cases (50％) were low birth weight infants.The patients in the planned pregnancy group tended to have flares during pregnancy more frequently than those in the unplanned group (P＜0.01),the former were more likely to have live births than the latter (P＜0.01) and were less likely to have premature delivery (P＜0.05).Conclusion Patients with SLE should have planned pregnancy and need collaborative supervision of both rheumatology and immunology department and obstetric department to improve live birth rate,decrease premature delivery and the activity of SLE during pregnancy.

Background and purpose:Quinonoids can change the cell cycle distribution of tumor cells, and effect the radiosensitizing. This study aimed to investigate the radiosensitization effects, cell cycle and apoptosis of cryptotanshinone on H22 hepatoma-bearing mice. Methods:The mouse hepatoma H22 model was established, then divided into blank control group, irradiation alone group, high dose of cryptotanshinone group, cryptotanshinone (low, medium and high)+IR groups. After irradiated, observed the growth of tumor’s conditions, record epigenetic tumor irradiation time, calculated the delay time of tumor growth and enhancement factor (EF). After 22 days, mice were killed, stripped tumor, and calculated the inhibition rate. The cell cycle distribution and apoptosis were measured by lfow cytometry. Results:Cryptotanshinone (low, medium and high) groups inhibited the tumor growth better than the blank group, and had the signiifcant radiosensitizing effect. The enhancement factor was 1.22, 1.43,2.19, respectively. Cells were treated with cryptotanshinone which had significant effects on cell cycle, and induced apoptosis, which indicated signiifcant G2/M phase arrest and a decrease in S phase. Conclusion:Cryptotanshinone inhibited the tumor growth and had the radiosensitizing effects on H22 hepatoma-bearing mice. One of the mechanism may be that it might make significant G2/M phase arrest and S phase decreased, and induced apoptosis. So cells were more sensitive to radiation.

Objective To explore nursing of the patients with acute myelogenous leukemia after upper abdominal cluster transplantation.Methods From March 2009 to August 2012,eight cases of upper abdominal organ cluster transplantation were performed in our center,among whom one suffered from acute myelogenous leukemia after operation.We summarized the clinical data and nursing methods of this case.Results The leukocytes,erythrocytes and platetets decreased 22 days after transplantation and the decreasing continued for more than four months.Four bone marrow biopsies were performed.During the first two biopsies,no definite cause of the blood cells decreasing was found,while the outcome of the third time showed that it was type M3 acute myeloid leukemia and genetic testing at the fourth time showed AML1/E-TO was positive.After diagnosis,the patient was shifted to the Department of Hematology and underwent further treatment.Conclusions Close observation,timely diagnosis and treatment,prevention of infection,bleeding and psychological nursing are the keys to promote patients recovery.

Objective To evaluate lower extremity deep venous hemodynamic changes and lower extremity deep venous disease in abdominal obesity.Methods To compare venous flow parameters of the lower limbs as assessed by Duplex ultrasound scanning in obese and nonobese individuals according to body mass index(BMI).Venous hemodynamics were studied in a prospective cohort study in nonobese( BMI ＜ 25 kg/m2) and obese individuals( BMI ＞ 30 kg/m2 ).Diameter,peak,mean,and minimum velocities were assessed.Results The study examined 45 limbs in 24 nonobese individuals and 44 limbs in 22 obese individuals.The diameter of the femoral vein was significantly greater in obese vs nonobese limbs ( 10.4 ± 1.3) mm vs (7.1 ± 1.0) mm,P ＜ 0.01 ).Calculation of venous amplitude and shear stress showed significantly higher values in nonobese vs obese limbs [ ( 11 ± 5 ) vs ( 8 ± 3 ) cm/s ],( P ＜ 0.01 ) and [ (0.50 ± 0.17 ) vs ( 0.30 ± 0.09 ) ] dyn/cm2,( P ＜ 0.01 ).Spearman rank correlation revealed a significant inverse correlation between waist-to-hip ratios and waist circumference and velocities amplitude (peak ve locity-minim velocity),and shear stress.Conclusions Lower limb venous flow parameters differ significantly between obese and nonobese individuals.These findings suggest the mechanical role of abdominal adipose tissue potentially leading to elevated risk for both chronic venous insufficiency and venous thromboembolism.

Objective:To research the rule of melatonin nasal absorption.Methods: The stability of melatonin in rat nasal wash was studied, after that the in situ rat nasal recirculation methods were used as experimental animal model to study the rule of melatonin nasal absorption.Results:Melatonin was stable in rat nasal wash, its absorption in nasal cavity accorded with first order kinetic equation. The absorption rate constants did not vary with melatonin concentrations.Conclusion:The mechanism of melatonin nasal absorption is passive diffusion, the average absorption rate constant is 1.054?10 -2 min -1 .

Objective To investigate the changes of pathogens distribution and antimicrobial resistance in children with urinary tract infection (UTI) in 10 years. Methods The results of urine culture and drug sensitivity in children with UTI from January 2001 to December 2003, and from January 2011 to December 2013 were retrospectively analyzed.Results In recent 10 years, there was no obvious change in the ratio of gram-negative bacteria to gram-positive bacteria. Escherichia coli was still the main bacteria causing UTI in children. The detection rate of enterococcus was signiifcantly increased from 18.3%in 2011-2013 to 7.5%in 2001-2003 (P<0.05) and it had become the second pathogenic bacteria. The isolation rate of ESBLs producing strains was signiifcantly higher in 2011-2013 than in 2001-2003 (P<0.05). The rate of Escherichia coli sensitive to imipenem re-mained at 100%and it is also sensitive to enzyme inhibitors antibiotics and nitrofuranto. Sensitivities to antibiotics were changed in different species of enterococcus. Conclusions The distribution of pathogens and antimicrobial resistance in children with UTI are constantly changing. The clinician should pay close attention to changes of epidemiology in the region and hospital and rational use of antimicrobial drugs.

OBJECTIVE:To optimize the extraction process for the preparation of Paeonia lactiflora formula granules and establish an HPLC method for the determination of Paeoniflorin in the samples.METHODS:The optimum water extraction process was selected by the L9(34)orthogonal design and the content of Paeoniflorin in formula granules was analyzed by HPLC.The HPLC assay was performed on a crosmosil C18-MS-II(250mm? 4.6mm,5? m)column.The mobile phase was employed by using acetonitrile-0.1% phosphoric acid(14∶ 86).The detection wavelength was set at 230 nm and the system was operated at 25℃.RESULTS:The optimum extraction conditions were to reflux for 3 times with 12 fold water and each time for one hour.The extraction rate of Paeoniflorin was 85.7% and the dried extraction yield was 34.4%.The peak area had a good linearity with the concentration of Paeoniflorin and the linear range was 0.128～ 0.640? g(r=0.999 8).The average recovery was 100.76% and RSD was 1.26%.CONCLUSION:The preparation process of Paeonia lactiflora formula granules was stable and feasible.The HPLC method for quality control was accurate and suitable.

Objective To investigate the clinical efficacy of the laparoscopic radical resection and the conventional laparotomy for colorectal cancer. Methods The clinical data of 106 patients with colorectal cancer treated by surgery from March 2011 to January 2016 were retrospectively analyzed, including 55 patients receiving laparoscopic surgery (laparoscopic group) and 51 patients treated by traditional surgery (conventional laparotomy group). The clinical effects of both groups were compared. Results The operation time in conventional laparotomy group was shorter than that in laparoscopic group [(141.2 ±40.6) min vs. (192.0±32.5) min, t=7.136, P<0.05]. The blood loss of the laparoscopic operation group was lower than that of conventional laparotomy group [(81.2 ±16.5) ml vs. (168.0 ±36.2) ml, t= 16.077, P< 0.05]. The recovery time of gastrointestinal function and hospital stay time in laparoscopic surgery group were significantly shorter than those in the laparotomy group (t= 12.236, t= 9.524, all P< 0.05). There were no statistical differences in the number of captured lymph nodes, complications and the length of bowel resection between two groups (all P>0.05). There were no severe complications and death case in both groups. Patients were followed up for 10-60 months, and there were no significant differences on recurrence and metastasis between two groups (P> 0.05). Conclusion Compared with the conventional laparotomy, laparoscopic radical resection is an effective method for the treatment of colorectal cancer with small trauma, less bleeding and fast recovery, which is worthy of clinical application.