ObjectiveTo investigate the changes in plasma myeloperoxidase (MPO), malondialdehyde (MDA), super-oxide dismutase (SOD) and total anti-oxidant capability (T-AOC) of Henoch-Sch?nlein purpura in children.MethodsA total of 80 HSP children hospitalized from November 2013 to April 2014 were selected including 40 cases of arthritis type, 20 cases of abdominal type and 20 cases of nephritis type (HSPN). Meanwhile, 16 healthy check-up children were selected as controls. Plas-ma MPO, T-AOC levels were detected by chemical colorimetry and MDA levels were detected by thiobarbituric acid colorime-try. Plasma SOD levels were measured by hydroxylamine method. Furthermore, 24-hour urine protein and other hematological indices were routinely tested.ResultsThe plasma levels of MPO, MDA, SOD and T-AOC were signiifcantly different among control group, arthritis type group, abdominal type group and HSPN group (F=24.22-126.99, allP=0.000). In comparison to oth-er three groups, the levels of MPO and MDA were signiifcantly increased and the levels of SOD and T-AOC were signiifcantly decreased in HSPN group (P<0.05). Compared with control group, the levels of MPO and MDA were signiifcantly higher and the levels of SOD and T-AOC were signiifcantly lower in arthritis and abdominal type groups (P<0.05). The levels of MPO and MDA in HSPN group were signiifcantly positively correlated with 24-hour urine protein (r=0.695, 0.559; bothP<0.01).Conclu-sionsThe imbalance between oxidation and antioxidant system exists in children with Henoch-Sch?nlein purpura.

Objective To study the clinical use of intramedullary interlocking nail in treatment of femoral and tibial fractures. Methods104 cases of femoral or tibial fractures were treated with intramedullary interlocking nails.Results The close and open reduction fractures had healed 6 10 and 8 12 weeks after surgery, and the fixation nails were taken out after 48 weeks. No broken nail, no delayed or nonunion, no infection, no fat embolism, no stiff joint occurred, All cases were followed up and the average following was 20 months without fracture.Conclusion The intramedullary interlocking nail had obvious advantage of reliable fixation, rotation and separation prevention, no need of external fixation support, high rate of fracture healing and allowance of early walk without support.

Objective To evaluate the clinical value of MSCTA in displaying the right gastroepiploic artery(RGEA).Methods 16-slice spiral CT enhanced images of abdomen in 80 cases were retrospectively reviewed.The course and the length of RGEA were observed and the diameters of RGEA at the origin and the end were also measured on maximum intensity projection(MIP),thin slice maximum intensity projection(TSMIP) and volume rendering(VR) images.Results The displaying rate of RGEA by MSCTA was 100% including long type in 22 cases(27.50%),moderate type in 53 cases(66.25%) and short type in 5 cases(6.25%).The average length of RGEAs was (19.5±4.5) cm.The average diameters of RGEAs at the origin in long,moderate and short type respectively were (2.69±0.26) mm,(2.70±0.18) mm,(2.68±0.12) mm respectively.The average diameters of RGEAs at the end in these three types were (1.76±0.17) mm,(1.75±0.18) mm and (1.74±0.05) mm respectively.The average diameters of RGEA in different length were no of statistical significance(P＞0.05).Conclusion RGEA can be evaluated with MSCTA before coronary artery bypass grafting.

Purpose To investigate the expression of DLC1 and its relationship with Ki-67 in cancerous and non-cancerous tissues of the breast.Methods In situ hybridization and immunohistochemiscal EnVision method were used to detect the expression of DLC1 mRNA and protein and Ki-67 in 52 invasive breast ductal carcinomas and 42 non-cancerous mammary tissues, including 22 mammary fibroadenomas and 20 paracancerous tissues.Results The positive rates of DLC1 mRNA and protein expression in the breast carcinomas (50% and 57.7%) was significantly lower than that in the non-cancerous mammary tissues (90.5% and 92.9%) (χ~2=17.518 and 10.729,P＜0.01).The expression of DLC1-mRNA was positively related to DLC1protein (r_s=0.379,P＜0.01). The positive rate of Ki-67 expression was 61.5% in the breast carcinomas, but no expression was observed in the all non-cancerous tissues (χ~2=39.186,P＜0.01).Correlation analysis showed that DLC1 expression was negatively correlated with Ki-67 expression (r_s=-0.507,P＜0.01).Conclusions Lower or no expression of DLC1 mRNA and protein may play an important role in the pathogenesis and progression in breast carcinoma. DLC1 may inhibit the proliferation of the breast carcinoma cells,which indicates that it may act as a new molecular marker of breast carcinoma.Combining detection of DLC1 and Ki-67 may be useful parameters for evaluating the biological behaviors of breast carcinoma.

Objective To explore if the occupational exposure to low dose thorium could induce adaptive response in peripheral lymphocytes.Methods 40 individuals.who exposed to thorium and rare earth mixed dust(exposure group) or control in Baotou Steel Plant, were selected, and chromosome aberrations were analyzed.Then the peripheral blood samples were irradiated in vitro with 2 Gy60Co γ-rays,and unstable chromosome aberration or DNA stand breakage analysis using single cell gel electrophoresis was performed. Results The dicentrics before 2 Gy exposure in exposure group was higher than that in control(P>0.05). But the dicentries after 2 Gy exposure in exposure group was lower than that in control,but not significantly (P>0.05).The tricentrics in exposure group was significantly lower than that in control(U=3.1622, 0.0ol

Objective To clarify the possible gene mutations in luteinizing hormone(LH) receptor gene in a boy with LH independent precocious puberty and probe the mechanism the of diseases caused by LH receptor activating mutations. Methods ( 1 ) Describe the clinical manifestations and laboratory data in a 5-year-old boy with LH independent precocious puberty. (2) Peripheral leukocytes were collected from the proband, his parents and other 20 normal puberty developed males. PCR and direct DNA sequence of 11 exons in LH receptors gene were conducted. Results (1) The proband was diagnosed to have LH independent precocious puberty according to the clinical symptoms and the laboratory tests. (2) A germ-line heterozygous point mutation in the 11 exon of LH receptor gene was found in the proband and his mother:c1193 T→C leading to amino acid change with M398T, which causes consecutively an activation of the LH receptor. (3) Other nucleotide changes in the proband and other normal males include c935 A→ G (N312S) and c1065 T→C(same sense mutation). Conclusions (1) A germ-line heterozygous point mutation in the LH receptor gene with M398T leads to consecutively activation of the LH receptor and LH independent precocious puberty. (2) The same point mutation does not have any influence on the puberty development, menstruation and productive functions of the proband's mother. (3) The LH receptor gene has possible polymorphism in the Han ethnic population.

Objective To construct sigF deletion mutant of Bacillus anthracis and the complementary strain of sigF deletion mutant in order to analyze the effect of losing sigF on formation of spores.Methods The spectinomycinadenyltransferase gene(spc) was inserted to replace sigF of B.anthracis by homologous recombination.A plasmid which contained sigF and sigF promotor was constructed and then transferred to the mutant to get a complementary strain of sigF deletion mutant.The characters of the mutant were analyzed by measuring growth curves, the ability of carbohydrate metabolism was compared, and spore formation was observed under a microscope.Results The sigF deletion strain A16D2△sigF was constructed from A16D2,which had a similar growth rate to the wild type A16D2 in logarithmic phase, but was not significantly different from the initial strain in the ability to use carbohydrates,although unable to form spores.The strain was found to maintain the state of asymmetric division by microfluidics experiment.Conclusion It is showed by this study that sigF is the essential gene of B.anthracis for spore formation, but not essential for vegetative growth.

Objective To detect serum brucellosis in high risk population,three methods were used and their advantages and disadvantages was compared.Methods In accordance with the surveillance standard for brucello-sis(GB 16885 -1997)and brucellosis diagnostic criteria(WS269 -2007)in the prescribed method,rose -bengal plate agglutination test (RBPT),standard -tube agglutination test (SAT)and enzyme linked immunoassay assay (ELISA)were used to detect brucellosis and analysis of its diagnostic significance in the high risk population of sheep farm of Guoyang county in Anhui province.Results The positive rates of RBPT,SAT and ELISA were 19.1%,12.1% and 16.3% in 257 blood samples,respectively.Compared to SAT,the sensitivity,specificity,accura-cy and the area under the ROC curve of RBPT were 88.5%,91.8%,91.4%,0.81,respectively,which of ELISA were 93.9%,95.1%,94.9%,0.88.Conclusion The sensitivity,specificity,accuracy and the area under the ROC curve of ELISA were higher than those of other methods.Proper method,early surveillance and effective technology can help to control the occurrence and epidemic of brucellosis in the actual test work promotion.

Objective To understand the present condition of preclinical dental undergraduate in-terns' AIDS-related knowledge. Methods The questionnaire was designed referring to domestic and foreign relevant questionnaires. The cluster sampling method was used to conduct the questionnaire survey among the undergraduates who started their clinical internship in July 2016 in three domestic colleges, using SPSS 14.0 statistical software to analyze it. Results In this survey, 144 questionnaires were distributed, and 144 ones were filled out and sent back. The survey results suggested that 97.22％ (140) of interns held a posi-tive attitude towards aiding HIV-infected patients despite that 96.53％ (139) of interns knew that dental medical staff was considered to be highly susceptible with HIV. In spite of the fact that most interns knew AIDS-related knowledge and protection measures, 40.28％ (58) of interns were not clear about incubation period of AIDS, and the average awareness of children's AIDS and methods to disinfect HIV-infected dental instruments was less than half in the interns. Meanwhile it was found that 86.81％ (125) of interns didn't perform well in terms of complying with the principles of confidentiality in AIDS prevention and treatment. Conclusion Dental clinical interns' attitudes towards AIDS-infected patients should be praised. Further-more, they should accept education about infection control to have a deeper understanding about AIDS-related clinical manifestations and legal knowledge in order to reduce the probability of nosocomial infec-tion of AIDS.

Objective:To investigate the diagnostic value of the promoter methylation of plasma RNF180 gene and its protein ex-pression for the detection of gastric cancer. Methods:Methylation-specific polymerase-chain reaction (MSP) and enzyme-linked immu-no-sorbent assay (ELISA) were performed to detect DNA methylation and protein expression of the RNF180 gene, respectively. The correlations of DNA methylation and protein expression of the RNF180 gene with the clinico-pathological parameters of gastric carcino-ma were then separately analyzed. Results:MSP showed that the methylation rates of the RNF180 gene were 62.75%and 21.88%in the plasma of patients with gastric carcinoma and healthy volunteers, respectively;this result indicated that the two groups significantly differed (P<0.01). The methylation of the RNF180 gene was associated with tumor size, clinical stage, tumor differentiation, lymph node metastasis, and distant metastasis (P<0.05). ELISA results showed that the protein expression of the RNF180 gene [(23.22 ± 1.36)μg/mL] was significantly lower (P<0.01) in the plasma of patients with gastric carcinoma than in the plasma of healthy volunteers [(34.25 ± 2.44)μg/mL]. However, the protein expression of the RNF180 gene was not associated with clinicopathological parameters (P>0.05). Conclusion:The RNF180 gene is expressed at a hypermethylation rate, and the corresponding protein expression level is de-creased in the plasma of individuals with gastric carcinoma. Therefore, RNF180 gene methylation in plasma could be applied to detect microinvasion for the clinical diagnosis of gastric cancer.