Objective To comprehensively analyze the effect of low-dose radiation on the lens of the eye of radiation workers.Methods The papers dealing with the relationship between occupational radiation exposure and the lens of the eye were collected by retrieving documents of the domestic and foreign medical information databases with references to other papers.There were 28 papers finalized with 17 608 workers included in the Meta-analysis.Stata12.0 was used for Meta-analysis,Q-test and I2 statistic for heterogeneity test,and funnel regression method,Begg's rank method and Egger's regression method for publication bias.Results The pooling odds ratio (OR) opacity in radiation workers were 2.51 (2.01,3.13),4.03 (2.77,5.85),respectively.Conclusions Low-dose radiation may lead to negative impact on ocular lens under the current occupational protection conditions.The proportion of posterior subcapsular opacity in radiation-related cataract is higher than that in age-related cataract.It is important to strengthen radiation protection of ocular lens.

Objective To quantitatively investigate the effect of low-dose ionizing radiation on the frequencies of chromosome aberrations and micronucleus-containing cells of radiation workers.Methods Nine electronic databases were systematically searched on the basis of the published studies evaluating the effects of low-dose ionizing radiation on the frequencies of chromosome aberrations and micronucleuscontaining cells.Of the 195 studies searched,21 studies were identified with a total of 1 970 626 cells under studying.Cochrane' s Q and I2 statistics were used to evaluate heterogeneity among studies and pooling odds ratio (OR) with 95％ confidence intervals (CI) were calculated using random-effect models or fixed-effect models,and publication bias were also calculated.Meta-analysis was performed using Stata 12.0.Results The pooling OR of chromosome-type aberrations [OR =3.03 (2.59,3.56)],dicentric plus centric rings [OR =4.12 (2.99,5.67)],translocations [OR =2.73 (1.67,4.46)],micronucleuscontaining cells [OR =1.70 (1.40-2.06)] were higher for radiation workers when compared with control group.Conclusions The frequencies of chromosome aberrations and micronucleus cell of peripheral lymphocytes are significantly high in radiation workers who were occupationally exposed to low-dose ionizing radiation.It should be noted that the radiation protection of radiological workers be enhanced.

Objective To explore the effect of autotransplantation of hair with intact follicle on pubic hair reconstruction in patients with congenital loss of pubic hair. Methods The scalps strips of 12 female patients were harvested from the back of the head, close to the hairline. Under the microscope, the strip was then divided into a series of follicular-unit micrografts. The hair was transplanted to defective pubic area with the needle of syringe (0.9 mm × 38. 0 mm). Four hundred to 700 follicle units (U) were transplanted for small areas with the shape of inverted triangle or diamond. The density of transplanted hair was 20 U/cm2 in the area of mons pubis. The further from the area of mons pubis the distance was, the lower the density was. But it was not less than 10 U/cm2. Results The patients were followed-up for nine months to two years. The hairs transplanted grew well. The appearance was close to the normal distribution of pubic hair. All of the patients were treated by this one-session operation, and satisfied with the results. The incision scar of donor area on the back of the head was inconspicuous. Conclusions The above-mentioned technique is a simple, safe and effective method for pubic hair reconstruction. It might be an ideal method for pubic hair reconstruction with the appearance much closer to a normal pubic hair.

Objective To investigate the clinical effect of tongue-shaped flap cut into the triceps and triceps both sides of the road approach road into the way of two surgical treatments of supracondylar fractures in children.Methods 90 patients with pediatric supracondylar fractures were chosen.50 cases of tongue-shaped flap to triceps road cut into were set as A group,40 patients taking brachial three muscles on both sides of the first approach were set as the B group.The clinical effects of the two groups were compared.Results The operative time,blood loss,cast immobilization time in B group was superior to group A ( P ＜ 0.05 ),there was statistically different.The pain score improvement in group B was significantly better than group A before and after treatment(P ＜0.05),the difference was statistically significant.After treatment,A group of patients with excellent results was in 22 cases,good in 24 cases,the fine rate was 92％.B group with excellent results was in 23 cases,good was in 16 cases,the good rate was 97.5％.The superior quality of the treatment effect in B group was better than A group( P ＜ 0.05),the difference was statistically significant.Conclusion The operative time,blood loss,time cast immobilization,pain improvement,the treatment effects for triceps both sides of the approach for the treatment of supracondylar fractures in children are better than the triceps tongue-shaped flap cut into the road,and there is high clinical value.

Objective To evaluate the clinical diagnosis and the clinical application value of serum CEA,CA19-9 and CA242 in patients with colorectal cancer. Methods The serum levels of CEA, CA19-9 and CA242 were concomitantly determined by ELISA in 150 preoperative patients with colorectal cancer, and 200 healthy people as a control group. Results The levels of CEA, CA19-9 and CA242 in patients were higher significantly than that in controls (P

OBJECTIVETo study the promoting effects of the epidermal growth factor (EGF) and stem cell factor (SCF) on the proliferation and differentiation of spermatogenic cells in mice.

METHODSWe cocultured in vitro spermatogenic cells of male mice aged 7 - 8 days in the medium with EGF and/or SCF at the concentrations of 5, 10, 20, 40 and 100 ng/ml, respectively. Then we observed the survival rate and morphological changes of the spermatogenic cells, detected the expressions of the pachytene-specific phosphoprotein gene (P19) and haploid sperm cell-specific transition protein gene (TP1), and analyzed the ploidy of the cells.

RESULTSAfter cocultured with EGF or SCF for 2 - 4 days, the spermatogenic cells began to proliferate in masses or chains in all concentration groups, most obviously in the 20 ng/ml EGF and 40 ng/ml SCF groups. At 7 days, both the number and survival rate of spermatogenic cells were significantly higher in the 20 ng/ml EGF and 40 ng/ml SCF groups than in the others (P < 0.05), and meanwhile, the P19/TP1 ratio was obviously decreased and the rate of haploid sperm markedly increased in the 40 ng/ml SCF group (P < 0.05). Combination of EGF and SCF remarkably promoted the proliferation of the spermatogenic cells (P < 0.05).

CONCLUSIONBoth EGF and SCF could increase the number and survival rate of spermatogenic cells. SCF could promote the formation of haploid sperm, and the combination of the two cytokines could enhance the effect on the proliferation of spermatogenic cells.

Animals ; Cell Differentiation ; drug effects ; Cell Proliferation ; drug effects ; Cells, Cultured ; Chromosomal Proteins, Non-Histone ; metabolism ; Epidermal Growth Factor ; pharmacology ; Male ; Mice ; Spermatocytes ; cytology ; drug effects ; Stem Cell Factor ; pharmacology

Background Pterygium is a relatively common eye disease,but its aetiology and pathogenesis remain uncertain.At present,the study on pterygia focuses on understanding its underlying mechanism.Objective This study was to detect the expression of 8-hydroxy-2'-deoxyguaine (8-OHdG),a marker of oxidative damage of DNA,and bcl-2,a gene related with apoptosis,on the pterygium tissue.Methods Thirty pterygium tissue specimens were obtained during the surgery with the primary pterygium 24 cases and recurrent pterygium 6 cases.In addition,20 normal conjunctival specimens from retinal detachment surgery and strabismus surgery were collected.The expressions of 8-OHdG and bcl-2 in pterygium tissue were detected using immunochemistry and compared with the normal conjunctival tissue.The difference in the expressions of 8-OHdG and bcl-2 among different specimens was compared by x2test,and the relationship between 8-OHdG expression and bcl-2 expression was evaluated by Kappa test.Results The positive expressing rate of 8-OHdG in the pterygium tissue was 62.5％ and 83.3％ in the primary and recrudescence pterygium tissue,respectively,but the expression of 8-OHdG was absent in the normal conjunctiva tissue.No significant difference was found in the positive expressing rate of 8-OHdG between primary and recrudescence pterygium tissue(x2 =0.938,P＞0.05).The bcl-2 expressing rate was 90.0％ and 87.5％ in the primary and recrudescence pterygium tissue,respectively.However,that in the normal conjunctival tissue was absent.No significant difference was seen in the bcl-2 expression rate between primary and recrudescence pterygium tissue (x2=0.833,P ＞ 0.05).Of the 27 pterygium tissue with bcl-2 positive expression,8-OHdG showed the positive expression in 20 specimens,and 3 specimens with the bcl-2 negative response were absent reactive to 8-OHdG,showing insignificant difference between them (P＞0.05).The relationship between 8-OHdG expression and bcl-2 expression was concord in a certein extent (Kappa =0.464).Conclusions The upregulation of 8-OHdG in the pterygium tissue indicates that oxidative damage of DNA plays a role in the development of pterygium.Oxidative damage of DNA caused by ultraviolet may be an upriver factor,which induces raising up of expression of bcl-2 and inhibits the apoptosis of normal cells and further proliferation of the conjunctiva tissue,resulting in the genesis and development of pterysium.

Objective To assay the level of neutrophil extracellular traps (NETs) in systemic lupus erythematosus (SLE) patients and healthy controls and compare the difference between SLE group and control group, and to analyze between the level of NETs and related laboratory parameters. Methods Forty-four females patients with SLE were recruited as research subjects, with 24 cases in the active stage and 20 in stable stage. Forty-two healthy female volunteers matched in age were enrolled as control subjects. The fluorescence intensity of NETs in neutrophils was detected by fluorospectrophotometry. The concentration of neutrophil elastase in plasma was quantitatively detected. Statistical analysis of the difference of level of NETs between the SLE group and control group was conducted. Then the correlation between the fluorescence intensity of NETs and erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP), and anti-double-stranded DNA (dsDNA), and anti-histone, and anti-nucleosome, and systemic lupus erythematosus disease activity index (SLEDAI) was analyzed respectively. The same tests were conducted for the level of NE. The results of the two groups were compared using analysis of variance and the relevance was analyzed using Spearman correlation analysis. NETs morphosis was observated by immunoflurescence method, and the difference of NETs between SLE group and control group was analyzed. Results ① The fluorescence intensity of NETs was significantly increased in SLE group(241±139) than that in the control group (173±135), (t=2.31, P<0.05).②The concentration of NE in the SLE group (102±47) was significantly higher than that in the control group (62±22), t= 4.38, P<0.01. No difference of NETs [(274±168) vs (211±102), t=1.52, P>0.05] and NE concentration [(104±43) vs (96±48), t=0.50, P>0.05] between SLE active stage and stable stage was detected. ③ The fluorescence intensity of NETs in SLE patients was positively correlated with SLEDAI, but had no obvious correlation with anti-dsDNA, anti-histone, anti-nucleosome, CRP or ESR, respectively. ④Images under confocal microscope showed that more NETs generated by PMN from SLE patients than that from controls. Conclusion The generation of NETs is enhanced in female patients with SLE. And NETs may relate to disease activity. However, NETs may not induce the production of autoantibodies.

Objective To assess the feasibility and clinical efficiency of laparoscopic Madigan enucleation of the prostate for the treatment of benign prostatic hyperplasia (BPH) with large prostate.Methods From Nov.2008 to Jan.2010,24 eases of BPH patients with large prostate ( ＞90 g) were treated in our institute by laparoscopic Madigan enucleation.The average patient's age was 65.2 yrs,the average prostate weight were 132.3 ± 21.9 g,preoperative residual urine was 143.2 ± 23.2 ml,average IPSS was 28.6 ± 3.8,average QOL was 5.5 ± 2.4 and average MFR was 5.4 ± 2.3 ml/s.All patients accepted the laparoscopic Madigan enucleation of the prostate.The pre-surgery and three months post-operative IPSS,QOL,and MFR were compared and analyzed.Results All 24 patients successfully completed the surgery.The resected prostate tissue weight was 104.7 ± 23.3 g,blood loss was 112.5 ± 47.8 ml,postoperative hospital stay was 3.5 ± 0.8 d,bladder irrigation time was 1.3 ± 0.9 d,drainage time was 2.3 ± 0.5 d and catheterization time was 3.1 ±0.4 d.Three months after surgery,patient's IPSS was 4.5 ± 1.8,QOL was 19.9 ±3.1,and MFR was 18.5 ±2.9 ml/s.All the parameters significantly improved compared with the pre-surgery data ( P ＜ 0.05 ).Conclusions Laparoscopic Madigan enucleation of the prostate is a safe and effective method in the treatment of BPH with large prostate volume.

A separation technology of catalpol from Rehmannia with macroporpus adsorbent resins was investigated. The content of catalpol in the extract was determined by high performance liquid chromatography (HPLC). Nine different kinds of macroporous adsorbent resins were studied on the static capacity of adsorption and desorption, and D101 resin was best for the separation of the extraction solution of Rehmannia. The results showed that D101 resin had the highest static adsorption capacity of 69.2mg/g dry resin and its isotherm curve can be well described by Langmuir and Freudlich equation. The 5% ethanol elution on removal of the solvent under reduced pressure provided a brown powder, which was subjected to an open column chromatography on silica gel eluted with a CHCl3–MeOH gradient. The fraction eluted with CHCl3-MeOH (8∶2) was identified as catalpol and the purity of the compound was more than 90% purity by HPLC analysis. The yield of this separation technology was 6%.