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Objective@#To investigate the effect of polycyclic aromatic hydrocarbons (PAHs) exposure on the level of histone H3Ser10 phosphorylation (p-H3S10) and DNA damage degree in peripheral blood lymphocyte (PBLCs).@*Method@#75 coke oven workers from Benxi steel plant in Liaoning Province of China (PAHs-exposed group) and local 50 hot rolling workers (control group) were recruited in this study with age, working years, labor intensity and high temperature for matching factors using cluster sampling method in 2014. HPLC-fluorescence was performed to determine the level of urinary 1-hydroxypyrene (1-OHP), DNA damage and specific histone modification were measured in PBLCs of the subjects through comet assay and ELISA assay, respectively. Linear regression model analysis was used to analyze the differences among PAHs exposure, DNA damage and p-H3S10 level in two groups. The Mediation analysis was used to analyze the regulated relationships between urinary 1-OHP, DNA damage and histone modification through the bootstrap method.@*Results@#Age of the control and the exposed group were (45.32±8.32) and (43.87±5.67) years old (P=0.284). The concentration of urinary 1-OHP, OTM value, Tail DNA% and p-H3S10 level in exposure group were higher than that in control group, while the M (P5-P95) of p-H3S10 levels in control and exposed group were 2.21 (0.68-4.71), 4.54 (1.85-23.91) (P<0.001). The degree p-H3S10 level was increased after the subgroups which were (2.59±1.19)%, (3.24±2.81)%, (5.55±3.25)%, (8.77±7.84)%, respectively, divided by quantitated 1-OHP concentration as P0-P25, P26-P50, P51-P75 and P76-P100 (P<0.001). We also found the correlations between urinary 1-OHP and p-H3S10 level or OTM value or Tail DNA%, β (95%CI) were 0.264 (0.167-0.360), 0.500 (0.299-0.702), and 0.510 (0.384-0.671), respectively (P<0.001). Similar result was also observed between p-H3S10 level and OTM value or Tail DNA%, β (95%CI) were 0.149 (0.073-0.226) and 0.220 (0.132-0.308) (P<0.001). Moreover, the mediation effect value of DNA damage on PAHs induced p-H3S10 alteration was 0.054(P=0.040).@*Conclusion@#The results suggested that PAHs exposure could induce DNA damage and an increase in histone H3Ser10 phosphorylation in PBLCs. Particularly, the alteration of H3S10 phosphorylation may play an important role in regulating cell DNA damage repair.
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Purpose To investigate the expression and clinical significance of RINGI and YYI binding protein (RYBP)in pancreatic carcinoma (PC).Methods RYBP expression was detected in 51 cases of PC tissues and paired adjacent nontumor tissues by immunohistochemistry.The correlation between RYBP expression and the survival time of PC patients after surgery was analyzed by Kaplan-Meier method.Results Compared to the expression in adjacent non-tumor tissues,RYBP was significantly lower expressed in PC tissues (P ＜ 0.05).In addition,RYBP expression had a significant correlation with tumor diameter and tumor staging of patients (P ＜ 0.05),but no significant correlation with other characteristics of patients,such as gender,age,smoking,alcohol intake,tumor number,metastasis or CA199 level (P ＞ 0.05).The survival analysis showed that the survival time of PC patients with positive expression of RYBP was significantly longer than patients with negative expression of RYBP (P ＜ 0.05).Conclusion RYBP is significantly lower expressed in PC tissues,which might be involved in the pathogenesis of PC.
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Objective To master the situation of iodine deficiency disorders (IDD) and the people's iodine nutritional status after implementation of the new salt iodine standard in Gansu Province in 2012.Methods Totally 30 counties (cities) were selected in Gansu Province by population proportionate to size sampling (PPS) method in 2014,and one primary school was selected in each counties (cities).In each selected school,50 children aged 8-10 years old were selected for thyroid examination by B-ultrasound,urine samples were collected for iodine determination,and salt samples were collected for iodine determination from a subset of children included in the study.Totally 20 pregnant women were selected from the towns with the sampled schools and urine samples were collected for iodine determination.Arsenic and cerium catalysis spectrophotometry (WS/T 107-2006) was used to detect urinary iodine content;direct titration (GB/T 13025.7-2012) was used to detect edible salt iodine content.Urinary iodine of children and pregnant women were compared with 2011 (before implementation of the new salt iodine standard).Results The median of salt iodine was 26.6 mg/kg,the iodized salt coverage rate was 99.5％ (1 492/1 500),the qualified rate of iodized salt was 89.3％ (1 333/1 492),and the consumption rate of qualified iodized salt was 88.9％ (1 333/1 500).The thyroid goiter rate of children was 3.2％ (48/1 500);a total of 1 499 urine samples of children were detected,the urinary iodine median was 169.8 μg/L,it was significantly lower than that in 2011 (216.0 μg/L,Z =-6.813,P ＜ 0.05).A total of 600 urine samples of pregnant women were detected,the urinary iodine median was 161.8 μg/L,it was significantly lower than that in 2011 (168.6 μg/L,Z =-3.590,P ＜ 0.05).Conclusion IDD has been controlled after implementation of the new standard of iodized salt and iodine nutrition condition is good.
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Objective To study radiological characteristics of hand-foot-mouth disease(HFMD) in children. Methods The chest X-ray films of 1295 children patients of HFMD were analyzed,for the general X-ray manifestations and the evolution. Results A total of 1427 films was obtained from all patients, in which 1203 cases were normal and 224 cases were abnormal. The interstitial changes characterized the abnormal group, mainly as increased and vague lung markings, increased hilar shadows (137 cases).The parenchyma changes appeared as patchy exudative shadows(49 cases). Short-term dynamic observation was applied in 62 cases, 38 cases pulmonary disease progression manifested as normal and the interstitial type changing into the parenchyma type and the mixed type, the localized type changing into the diffuse type. Conclusions Most children patients of HFMD showed normal chest films, while the abnormal patients were characterized by interstitial and parenchyma pulmonary edema. Serial chest X-ray examination and short-term dynamic observation were important to identify the severe cases and assess patients' condition.