Probability of causation (PC) was used to facilitate the adjudication of compensation claims for cancers diagnosed following exposure to ionizing radiation. In this article, the excess cancer risk assessment models used for PC calculation are reviewed. Cancer risk transfer models between different populations, dependence of cancer risk on dose and dose rate, modification by epidemiological risk factors and application of PC are also discussed in brief.

Objective To investigate the effect of folic acid intervention on plasma homocysteine (Hcy) metabolic changes and pulse wave velocity(PWV)in patients with type H hypertension. Methods Patients(hos-pitalized from March 2014 to December in our hospital)with H type hypertension were randomly divided into treat-ment group and control group randomly ,and were given routine antihypertensive drug therapy. Treatment group was given oral folic acid 0.8 mg,1 times a day,the control group was given placebo,1 times a day. All patient were treated for 12 months. Changes of plasma Hcy and PWV levels were observed. Results 432 patients(Han nationality)with type H hypertension were enrolled in this study with the age of 61.7 ± 13.6 years old and the ratio of men and women is 1.3:1. The most common diseases were coronary heart disease and type 2 diabetes mellitus. 2 groups were treated for a period of 12 months,with follow-up time from 6 to 10 months(average duration in 8 months). After treatment,the difference between plasma Hcy(Z=-7.63,P=0.000)and PWV(Z=-3.16,P=0.002)levels of the two groups were statistically significant. Conclusion Folic acid intervention can significantly reduce the level of plasma Hcy in patients with type H hypertension ,slow down the progression of atherosclerosis and reduce the risk factors of cardiovascular disease.

AIM:To evaluate 23G vitrectomy for macular edema in eyes with retinal vein occlusion (RVO) combined with vitreoretinal traction (VMT) or epiretinal membrane (ERM).METHODS:Totally 22 patients (22 eyes) diagnosed with macular edema of RVO combined with VMT or ERM were retrospectively analyzed.Twelve cases performed with 23G vitrectomy together with peeling of inner limiting membrane (ILM) and/or ERM were considered as the observation group or intervention group.Ten cases without vitrectomy were recruited as control group.The best corrected visual acuity (BCVA) and central retinal thickness (CRT) at baseline, 1, 3 and 6mo were recorded and compared.RESULTS:At baseline, the difference of BCVA and CRT between observation group and control group was not statistically significant (P=0.645, 0.206).After vitrectomy, the BCVA and CRT of RVO patients in observation group were significantly improved compared with baseline at each follow-up (F=2.895, P=0.048;F=16.431, P<0.01).However, the BCVA and CRT in control group remained the same as baseline at every follow-up.Moreover, the BCVA and CRT in observation group were much better than that in control group at both 3 and 6mo after vitrectomy.However, the BCVA and CRT between two groups were not significantly different at 1mo postoperatively.CONCLUSION:The 23G vitrectomy could markedly improve BCVA and reduce CRT in RVO patients with macular edema combined with VMT and/or ERM.

Objective To investigate a method of repairing complex tissue defects one stage in one finger or several fingers for more fine recipient site repairing and less donor area traum. Methods From August 2007 to August 2010,eight cases of 20 fingers were reconstructed according to the state of complex tissue defects in a hand,second toes (right or left side) were split into two or three parts as complex tissue flaps that may including joints,tendons,skin,nail beds,et al.These flaps then were translated to hand to repair complex tissue defects by anastomosing vessels.Results Twenty fingers in 8 cases were successfully reconstructed.Follow-up ranged from 3 months to 36 months,external appearance were fine.According to the Trial Evaluation Standard of Reconstructed Finger Function of Handsurgery Society of China,sixteen fingers were excellent,three fingers were good,one finger was fine.And there was no effect on foot.Conclusion Spliting single second toe is a good method for repairing more complex tissue defects in a hand.

OBJECTIVETo observe the effects of Xiaobai Decoction (XBD) in reducing albuminuria and shortening the duration of albuminuria in patients with pregnancy-induced hypertension syndrome (PIH) in puerperium.

METHODSEighty-five patients were given the conventional treatment with magnesium sulfate for relieving convulsion and lowering hypertension, at the same time, the treated group was given XBD additionally with the modification according to the symptoms. The treatment course for both groups was 14 days. Routine test of midstream urine was performed every three days, and 24 h-urinary protein was measured every week.

RESULTSThe therapeutic effect on the 43 patients of the treated group was markedly effective in 11 (25.6 % ), effective in 26 (60.4%) and ineffective in 6 cases (14.0%), the total effective rate being 86.0%; while in the 42 patients of the control group, the corresponding numbers were 5 (11.9%), 21 (50.0%), 16 (38.1%) and 61.9%, respectively, the efficacy of the former was significantly better (P < 0.05).

CONCLUSIONXBD is a simple, safe and effective drug for reducing albuminuria and shortening the duration of albuminuria in puerperium of PIH patients.

Adult ; Albuminuria ; drug therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Hypertension, Pregnancy-Induced ; drug therapy ; Phytotherapy ; Postpartum Period ; Pregnancy ; Treatment Outcome ; Young Adult

A new wood-degrading fungus Monodictys asperospera(Cooke & Massee) Ellis with a high level of laccase production was chosen to study.This laccase was purified by ammonium sulfate precipitation,DEAE-cellulose and sephacryl S-300.Purification of about 8.1 fold was achieved with an overall yield of 5.7%.Its molecular weight was estimated to be about 77 kD.The optimum temperature and pH of the lac-case activity were 55?C and 6.0,respectively.Kinetic studies of the laccase showed that the Km and the Vmax for using syringaldazine as substrate was 0.163 mmol/L and 0.194 mmol/(L.min),respectively.The carbo-hydrate content was 18.14%.In addition,it was found that laccase activity was significantly inhibited by Cu2+.

Objective To construct a voxel mouse model combining with Monte Carlo method used for radiation dose calculation.Methods A set of slice images obtained from a nude male mouse (28 g) was utilized, all slice images were registered,some organs or tissues were identified, segmented and filled with specific color, and finally the physical property was defined by MCNP application.Results A mouse model with a voxel size of 0.2 mm×0.2 mm×0.2 mm, consisting of 14 organs or tissues,was constructed, which could satisfy the requirement of precision for radiation dose distribution calculation and moderate computing time.Conclusion The voxel mouse model can be used to calculate the quantity of ionization radiation dosimetry in related areas including radiological medicine, nuclear medicine and space radiation medicine.

ObjectiveTo investigate the iodine nutritional status of residents in Shanxi province,and to provide a scientific basis for adjustment of control strategies and measures to iodine deficiency disorders (IDD).MethodsIn the 11 cities and 119 counties(cities,districts),except high water iodine townships,9 townships were selected in each county according to their sub-area positions of east,west,south,north and center,4 villages were sampled in each chosen township,and 8 households were selected in each chosen village in every chosen county (cities,districts ) with 9 or more townships.In every chosen county (cities,districts) with 6 to 9 townships,1 township was selected respectively in east,west,south,north and center sub-areas of the township,4 villages were sampled in each chosen township,and 15 households were selected in each chosen village.In the county (cities,districts) with 5 or less townships,all township were selected,4 villages were sampled in each chosen township,and 15 households were selected in each chosen village.Edible salt samples from these households were collected; iodized salt was determined by direct titration.In the 119 counties(cities,districts),1 township was selected,respectively,in east,west,south,north and center sub-areas in each county,and 20 children aged 8 - 10 in each of the selected townships were selected to collect urine samples and urinary iodine was determined by As-Ce catalytic spectrophotometry.Evaluation criteria:median urinary iodine ＜ 100 μg/L was iodine deficiency,100 - 199 μg/L as appropriate,200 - 299 μg/L as more than appropriate,and ≥ 300 μg/L as iodine excess.ResultsMedian iodine of the 34 808 household salt samples was 31.55 mg/kg.The coverage rate of qualified iodized salt was 99.18％(34 521/34 808) and the consumption rate of qualified iodized salt was 97.12％(33 805/ 34 808).In the 11 cities,119 counties(cities,districts),the median of urinary iodine of 11 967 children aged 8 -10 was 244.0 μg/L,of which ＜ 50 μg/L acoounted for 2.6％(312/11 967),50 - 99 μg/L accounted for 6.9％(823/11 967),100- 199 μg/L accounted for 26.3％(3145/11 967),200 - 299 μg/L accounted for 28.7％(3440/11 967),and 300 μg/L or higher accounted for 35.5％(4247/11 967).The medians of urinary iodine in the 9 municipal cities were 200 - 300 μg/L,and other 2 cities were 300 - 400 μg/L At the county level,the medians urinary iodine of children of the 119 counties(cities,districts) were 100 - 199 μg/L that accounted for 15.1％(18/119),200 - 299 μg/L accounted for 63.9％(76/119),and 300 μg/L or higher accounted for 21％(25/119).Conclusions The iodine nutrition level of residents in Shanxi province is more than appropriate.The salt iodine concentration in Shanxi province needs to be reduced,but the space is not wide.

Objective To explore the expressions of circulating microRNAs (miRNAs) in acute liver failure mice induced by D-galactosamine (GalN)/lipopolysaccharides (LPS) and the correlation with miRNAs in the liver.Methods Forty clean grade Balb/C mice,with 32 in the model group and 8 in the control group were enrolled in the study.Liver failure was induced by intraperitoneally injection of D-GalN and LPS in mice of the model group,while mice of the control group were intraperitoneally injected with 1 mL 0.9 ％ sodium chloride solution.Serum and liver samples were collected at 0,3,5,7 hours following administration,and eight mice should be supplied to each sample,and changes of alanine aminotransferase (ALT),aspartate aminotransferase (AST) and histopathology of the liver were observed.miRNA from both the serum and the liver was extracted,miRNA expression profile in the liver at 0,5,7 hours by locked nucleic acid (LNA)-miRNA microarray was analyzed and miRNA by quantitative real-time reverse transcription polymerase chain reaction (RT-PCR) was detected.Means of the two groups were compared using one-way ANOVA and correlation analyses were performed using Pearson and Spearman correlation.Results Expression of miRNAs in the liver tissue changed significantly over time with the occurrence of acute liver failure in the mice.Twenty-one miRNAs were up-regulated and 27 were down-regulated,among which miRNA-122 and miRNA-1187 were down-regulated while miRNA-146a and miRNA-155 were up-regulated.It was confirmed by the PCR assay that the expression of miRNA-122 and miRNA-1187 in the liver gradually decreased,while those in the serum were up-regulated over time.However,the expressions of inflammation associated miRNA-155 and miRNA-146a were up-regulated both in the serum and the liver after administration.The expressions of miRNA-122 and miRNA-1187 were negatively correlated between serum and liver (r=-0.477,P=0.0089,r=-0.420,P=0.231),while the expressions of miRNA-155 in serum and liver were positively correlated (r=0.678,P=0.0001).Moreover,the expressions of miRNA-122 (r=0.571,0.554) and miRNA-1187 (r=0.471,0.542) were also positively correlated with serum levels of ALT and AST (all P＜0.05).Liver and serum levels of miRNA-122 and miRNA-1187 changed significantly at 5 hours after administration,which preceded the changes of ALT/AST.Conclusions The expressions of miRNA-122 and miRNA-1187 in serum are well inversely correlated with the corresponding expressions in liver tissues during acute liver failure in mice.The changes of miRNA-122 and miRNA-1187 in the serum precede those of ALT/AST.These data suggest that serum miRNA-122 and miRNA-1187 might be the candidate serum biomarkers for early prediction of liver injury.

ObjectiveTo investigate the histological features as well as the factors influencing liver disease progression in Chinese patients with chronic hepatitis C (CHC). MethodsA total of 102 CHC patients who underwent percutaneous liver biopsy between August 2007 and May 2010 were recruited. Age, gender, body mass index (BMI) and transmission route of recruited patients were recorded. Serum levels of alanine transaminase (ALT) and aspartate transaminase (AST), HCV genotypes, HCV viral load and liver histological changes were detected. Statistical analysis was done by t test and Logistic regression. ResultsThe serum levels of ALT and AST in CHC patients with histological activity index (HAI) ≥4 were much higher, while platelet (PLT) counts were lower than those with HAI ＜4(t=2.209, 2. 298 and 2. 565, respectively; all P＜0.05). Likewise, in patients with F≥3, the serum levels of ALT and AST as well as the mean age and the duration of infection were significantly elevated compared with F ＜ 3 group ( t = 3.497, 2. 758, 2. 340 and 2. 570,respectively; all P＜0. 05), while PLT counts were much lower (t = 2. 761, P=0. 007). The unvariate predictors for HAI≥4 were female, ALT＞1 × upper limits of normal (ULN), AST level,F≥3, HCV RNA≥6 lgIU/mL and PLT counts. By mutivariate analysis, the Ishak stage score was the only independent predictor for HAI≥4 (OR 3.098, 95％CI 1.884-5. 092; P＜0.01). Finally,the univariate predictors for F≥3 were age, BMI≥24 kg/m2 , ALT＞1 × ULN, AST level, HAI≥4,PLT counts and duration of infection≥ 15 years. Multivariate analysis revealed that age (OR 1. 074,95％CI 1.006-1. 146; P=0.033), ALT level (OR 1. 035, 95％CI 1.015－1.055; P＜0.01), ASTlevel (OR 0. 969, 95％CI 0. 948－0. 990; P=0. 005), the duration of infection ≥15 years (OR 37. 215, 95％CI 5. 816－238. 127; P＜0.01) and HAI≥4 (OR 1. 939, 95％CI 1. 426－2. 636; P＜0.01) were independent predictors for F≥ 3. ConclusionAge, ALT level, AST level, duration of infection≥15 years, HAI≥4 are independent predictors for liver fibrosis.