Humans are exposed to the ubiquitous radiofrequency (RF, 100 kHz-300 GHz) electromagnetic fields because of the mushroom development of wireless communications,raising concerns over the possible hazards of RF radiations.Epidemiological investigation has showed that chronic use of cellphones increases the risk of brain tumors.Since genetic damage is closely related to tumors, researchers have been trying to find out whether cellphones and other RF devices are genotoxic.However, the investigations have yielded both negative and positive results.This review summarized the recent in vitro and in vivo researches about genotoxicity of RF radiations and proposed a possible mechanism by which of RF radiations cause genetic damage.

Objective To investigate the relation between VEGF and prognosis of lung carcinoma.Methods ESISA was used to investigate the level of VEGF in lung carcinoma group,pulmonary disease group and normal group,and evaluate the diagnostic efficiency of lung carcinoma transfer or dead.Results The levels of VEGF in lung carcinoma group and pulmonary disease group were significantly higher than those in normal cases(P0.05).The level of VEGF in pulmonary disease group had a degression after treatment.The negative rate of lung carcinoma was 76%.The transfer rate in the increases group of lung carcinoma was 65% in the six month.The dead rate was 10%(P

Adult ; Aged ; Aged, 80 and over ; Drugs, Chinese Herbal ; therapeutic use ; Esophageal Neoplasms ; radiotherapy ; Female ; Humans ; Lung Neoplasms ; radiotherapy ; Male ; Middle Aged ; Phytotherapy ; Radiation Pneumonitis ; drug therapy

OBJECTIVETo understand clinical features of in-patients with varicella and complications in our hospital during 1980-1999.

METHODSAge distribution, season characteristics, complication, occurrence of hospitalized varicella patients in 1980-1999 were analyzed.

RESULTSVaricella mainly occurred in pre-school and school children, most cases were seen in winter and spring. There were 240 hospitalized varicella patients, 160 of whom had complications, 126 patients scattered in 1994-1996 (78.75%). The most often seen complication was skin infection which occurred in 71 patients (44.38%); the second was encephalitis, which occurred in 29 patients (18.12%).

CONCLUSIONSThe occurrence of varicella increased and the disease seemed to be more serious.

Adolescent ; Age Distribution ; Chickenpox ; complications ; epidemiology ; Child ; Child, Preschool ; China ; epidemiology ; Encephalitis ; etiology ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; Retrospective Studies ; Skin Diseases, Infectious ; etiology

Objective To develop a multiplex PCR-based reverse line blot(mPCR/RLB) hybridization assay to detect,simultaneously,seven genes encoding AR-erm(A/TR),erm(B),mef(A/ E),tet(M),tet(O),aphA-3,aad-6 and two AR-related genes,int-Tn and mreA in group B streptococcus.Methods Nine pairs of specific primers and Oligonucleotide probes targeting erm(A/TR), erm(B),mef(A/E),tet(M),tet(O),aphA-3,aad-6 int-Tn and mreA respectively were modified according to former studies or designed in this study.The primers and probes were labeled with biotin and amino,respectively.The nine genes were amplified simultaneously in the same tube.PCR product hybridized with the probes labeled in the BiodyneC nylon membrane to detect the nine genes.To detect the sensitivity and specificity of the method developed,PCR with single pair of primer targeting each gene were tested in 318 isolates tested and the results were compared with the one abtained by RLB.Results The nine resistance-related genes could be successfully detected by mPCR/RLB assay developed in this study.Based on sequencing,21 of 22 isolates with mef had mef(E)and eight of 353 with int-Tn had an atypical sequence.Except for the above 29 genes,all the others corresponded well with the results obtained by single pair primer PCR.Conclusion The mPCR/RLB assay developed in this study is simple,rapid and suitable for surveillance of antibiotic resistance in GBS.

BACKGROUND:Locking compression plate and dynamic hip screw are the two major extramedul ary fixations for the femoral intertrochanteric fractures, however, the comparison of the clinical efficacy between two methods is stil controversial. OBJECTIVE:To systematical y evaluate the clinical efficacy of locking compression plate versus dynamic hip screw in the treatment of femoral intertrochanteric fractures, and provide a theoretical basis for clinical application. METHODS:Authors searched for control ed studies on locking compression plate and dynamic hip screw in the treatment of femoral intertrochanteric fractures in PubMed, Embase, Cochrane Library, China National Knowledge Infrastructure, VIP periodical database, Wanfang resource database, Chinese Biomedical Literature service systems published from January 1999 to April 2014. The inclusion and exclusion criteria were made, and the literature meeting the criteria was screened, and the methodological quality of the included studies was evaluated. Meta-analysis was carried out using the RevMan 5.2 software. RESULTS AND CONCLUSION:Ultimately 682 patients from 8 studies met the inclusion criteria, including 336 patients in the locking compression plate group and 346 patients in the dynamic hip screw group. Meta-analysis results showed that:there were no statistical y significant differences in operating time [MD=-12.07, 95%CI (-29.85, 5.71), P=0.18], peri-operative bleeding loss [MD=-15.01, 95%CI (-87.85, 57.83), P=0.69], post-operation drainage [MD=-13.62, 95%CI (-28.49, 1.26), P=0.07], ambulation time [MD=-0.14, 95%CI (-0.68, 0.41), P=0.63], length of hospitalization [MD=-0.74, 95%CI (-2.29, 0.82), P=0.35], bone union time [MD=-1.18, 95%CI (-2.78, 0.42), P=0.15] between locking compression plate and dynamic hip screw groups. The excellent and good rate of postoperative hip function reduction [OR=2.03, 95%CI (1.23, 3.36), P=0.006] was significantly higher in locking compression plate group than in the dynamic hip screw group. The incidence of coxa vara was lower in the locking compression plate group than in the dynamic hip screw group [OR=0.34, 95%CI (0.12, 0.96), P=0.04]. There were no significant differences in looseness, breakage, withdrawal of internal fixation [OR=1.20, 95%CI (0.59, 2.45), P=0.61] and the incidence of total complications [OR=0.55, 95%CI (0.24, 1.28), P=0.16] between locking compression plate and dynamic hip screw groups. However, the included studies have high possibility of selection bias and measurement bias, and wil affect proof strength of results. Therefore, more clinical randomized control ed studies with compact design are needed for verification.

OBJECTIVETo study the population structure and ecological distribution of the rhizosperic microorganisms of Angelica sinensis.

METHODThe isolation, culture and identification of microorganisms were studied by the biological methods, and the achieved data were analyzed by the statistical methods for analysis of species diversity.

RESULTWith the growing stages of A. sinensis from Min county of Gansu province, Heqing of Yunnan province and Baoxing of Sichuan province, the quantity of rhizosperic microorganisms increased; and it had reduced since October. In the area of Min county Gansu province, the number ratio of bacteria and fungi was higher than that in the other two areas. In addition, the population diversity and dynamic change were different in three areas. In the area of Min county Gansu province, the number of dominant microbial populations and the population diversities of bacteria, actinomyces and fungi in the rhizosphere were greater than those in the other two areas.

CONCLUSIONThe microecological system and microbial population structure in the rhizosphere of Min county Gansu province were stable. And it was suitable for the growth of A. sinensis in this area.

Angelica sinensis ; microbiology ; Bacteria ; classification ; isolation & purification ; Biodiversity ; Fungi ; classification ; isolation & purification ; Plant Roots ; microbiology ; Soil Microbiology

Euphorbia kansui (EK) is a toxic herbal drug, and often used after vinegar-processing to reduce its toxicity. In present study, a 1H-NMR based metabonomic approach was used to evaluate the detoxification effect of vinegar-processed EK. The water extracts of EK and VEK were administered orally to male SD rats at doses of 9 g x kg(-1) x d(-1) for 1 week, respectively, and one more week observation was further conducted. The control group was orally given with saline. Histopathological studies of liver samples on the 8th and 15th day were conducted, and the metabolites of rat urine and liver were analysed by 1H-NMR. Histopathological studies of liver samples from EK and VEK treated rats showed no negative impacts. In metabonomic analyses of urines, changes of metabolites indicated liver damages, kidney lesions and imbalance of gut microbes in the second week. VEK-treated rats showed a quite lower toxicity compared with EK-treated ones. The present study revealed that the metabonomic approach might be helpful for the evaluation of toxicity of EK and detoxic effect of VEK.
Acetic Acid ; chemistry ; Animals ; Chemistry, Pharmaceutical ; Drugs, Chinese Herbal ; chemistry ; pharmacokinetics ; toxicity ; Euphorbia ; chemistry ; Inactivation, Metabolic ; Liver ; drug effects ; metabolism ; Magnetic Resonance Spectroscopy ; Male ; Metabolomics ; methods ; Rats ; Rats, Sprague-Dawley ; Urinalysis

ObjectiveTo evaluate the clinical application of endovascular treatment for severe Takayasu's arteritis (TA).MethodsIn this study,35 target lesions in 32 patients [28 women,mean age (30 ±8) years] with severe Takayasu's arteritis were treated with endovascular merthod.The average length of lesion was 3.1 cm( range 2.7 -5.3).The overall average degree of diameter stenosis was 90％ ± 11％ (range 70- 100)in which 15 lesions were completely occlusive.There were 10 patients whose ESR were higher than 20 mm/h( range 25 -37).Follow-up included physical examination and patency evaluated by color duplex souography/computed tomography angiography/angiography at 6 months and then annually.ResultsRecanalization was unsuccessful in 3 completely occlusive lesions,with a successful rate of 80％(12/15).There was one case in which embolization leading to acute thrombogenesis developed during interventional procedure and resulting in severe stroke.The technical successful rate ( residual stenosis ＜ 50％ ) was 88.6％ ( 31/35 ).The transient cerebral ischemia attack ( TIA ) symptoms disappeared in 31 cases.26 cases were followed up for an average of (19 ± 10) months (range 13 -40).Occipital infarction following severe in-stent restenosis developed 13 months later in one case.Symptomatic in-stent restenosis18monthslaterwasfoundin2cases. Patencyratewas88.5％( 23/26 ).ConclusionsEndovascular treatment is safe and effective for severe TA.Strict indication and accurate targeting the lesions help ensure the success of management.