With the development of automated quantitative detection of serum hepatitis B surface antigen ( HBsAg) , HBsAg quantification is becoming increasingly important in management of chronic HBV infections.Studies have shown that HBsAg quantification together with HBV DNA load may be used to monitor the natural history of chronic HBV infection as well as to predict the clinical outcome of interferon treatment.However, there is no consensus on the clinical use of HBsAg quantification for evaluating patients′responses to nucleos( t) ide analogues therapy.This paper reviews the up-to-date clinical studies on the clinical significance of HBsAg quantification in management of chronic HBV infection.

OBJECTIVE:To put forward game strategy of drug safety regulation,and to provide reference for decision-making by drug regulation department. METHODS:Based on evolutionary game theory,evolutionary game model of drug safety regula-tion was established,and the stability of evolution during drug safety regulation was analyzed. RESULTS & CONCLUSIONS:There were four possible evolutionary game results of drug safety regulation,including to provide qualified drugs,regulation;to provide unqualified drugs,regulation;to provide qualified drugs,no regulation;to provide unqualified drugs,no regulation. The evolution direction mainly depends on the parameter values involved in the payoff matrix of drug safety regulation. The stable state of drug safety regulation is related to regulation strength,regulation cost,enterprise safety input,probability of accident,acci-dent-related treatment cost,et al. Key strategies to improve drug safety regulation include increasing punishment,improving moni-toring technology,strengthening coordination mechanism,promoting social cohabitation and improving industry self-control.

Humans ; Salivary Glands

Adult ; Female ; Humans ; Male ; Middle Aged ; Pesticides ; poisoning

Adult ; Female ; Humans ; Middle Aged ; Nurses ; Occupational Exposure ; prevention & control ; Operating Rooms ; Surveys and Questionnaires ; Universal Precautions ; Young Adult

Objective To observe histologic changes of human cytomegalovirus(hCMV)-infected explants of first trimester human placenta and expression of hCMV gene in the hCMV-infected explants, and investigate the mechanism of intrauterine transmission of hCMV from mother to fetus.Methods The first trimester placenta explants cultures were carried out, and they were infected with hCMV for 10 days. The expression of hCMV immediate early protein(IEP) 72-IEP86 were determined using indirect-immuno fluorescent assay, and in situ hybridization method was used to examine the hCMV late gene (LG)mRNA. For histologic evaluation of morphological changes in villi, transmission electron microscope was used.Results (1) Typical hCMV-induced lesions bearing hCMV IEP72-IEP86 were consistently localized in the trophoblast of covering placenta villi, interstitial cell and vascular endothelia cell 12 hours after infection, and were predominant in cytotrophoblast. (2) Replication of hCMV in placenta explants culture occurred from 12 hours to 24 hours and disappeared since 48 hours after infection with different concentrations of hCMV when examined by in situ hybridization. (3) Tissue integrity and viability of first trimester placenta explants were obtained in culture for 10 days and then explants were infected with different concentrations of hCMV 100 tissue culture infectious doses(TCID_ 50 ),200 TCID_ 50 and 300 TCID_ 50 , the progression of the infection was observed in the tissue that maintained its normal cellular organization under light microscope. But typical inflammation of cellular organization was observed under transmission electron microscope. Conclusions (1) A flash replication of hCMV in placental explants culture occurs; IEP72-IEP86 may be in intrauterine infection of hCMV for a long time. (2) There are pathological ultrastructure changes in hCMV-infected explants.

In the past, the ways to amblyopia neural mechanism research are given priority to visual electrophysiology and so on, which express the result use two -dimensional form, these ways mainly research the functions of the state before the lateral geniculate body. For the study of optic center, animal models are used to research it. But these kinds of methods are unable to accurately detect amblyopia neural mechanisms of human beings. Vulnerable to a variety of factors, it is difficult to finish the amblyopia treatment effect evaluation. Functional magnetic resonance imaging ( fMRI ) can reflect the three-dimensional visual cortex neuron activity noninvasively and accurately, and give rise to amblyopia neural mechanism and therapeutic effect evaluation. Therefore, in this paper, the amblyopia neural mechanisms and visual center after treatment effect evaluation of fMRI research progress are summarized.

AIM:To explore the clinical effect of capsule membrane phacoemulsification and capsular bag in phacoemulsification in treatment of hard nuclear cataract with high myopia.
METHODS:A total of 297 patients(322 eyes) with hard nucleus cataract(Ⅳ-Ⅴ grade nucleus) and high myopia were selected from Mar. 2014 to Mar. 2016 in our hospital. They were randomly divided into the observation group with 149 cases(162 eyes) and the control group with 148 cases(160 eyes). The observation group received capsule membrane phacoemulsification and the control group received capsular bag in phacoemulsification. The therapeutic effect and safety of patients in two groups were compared. The comparison of phacoemulsification time, energy parameters and corneal endothelial cell density used t-test, post-operative visual acuity and the occurrence of complications were tested by Chi-square test.
RESULTS: The harder the nucleus was, the longer the phacoemulsification time and higher the average phacoemulsification energy was, and the differences were statistically significant(P<0. 05). The phacoemulsification time and energy parameters of the observation group were significantly lower than that of the control group( P<0. 05 ). One month after operation, the postoperative visual acuity in two groups was significantly higher than the visual acuity at 1d after operation(P<0. 05). But there was no statistical significance on the visual acuity at 1mo after operation between two groups ( P> 0. 05 ). After operation, the density of corneal endothelial cell in two groups was significantly lower than the density before operation ( P < 0. 05 ). But there was no statistical significance on the density of corneal endothelial cell after operation between two groups ( P > 0. 05 ). The intraoperative complication rate of observation group was significantly lower than that of the control group ( P<0.05 ) , but there was no statistical significance on postoperative complication rate between two groups ( P>0. 05). CONCLUSION: For the treatment of hard nuclear cataract with high myopia, capsule membrane phacoemulsification and capsular bag in phacoemulsification have similar effect, but capsule membrane phacoemulsification has better safety.

Objective: To evaluate the relation between the single nucleotide polymorphism of CYP2D6 gene G4268C and the genetic susceptibility to lung cancer. Methods: A case-control study was conducted among 118 lung cancer patients and 118 control subjects (matched for sex, age) to investigate the role of CYP2D6 gene G4268C polymorphism in lung cancer; PCR-RFLP was used to identify the genotypes of polymorphism. Logistic regression was used to analyze the relationship between polymorphism and genetic susceptibility to lung cancer. Results: The frequency of G4268-C mutation in case and control group were 69.49% and 75.00%, respectively. Non-C4268/C genotype (including G4268/G and G4268/C genotype) was correlated to the high risk of lung cancer, with OR adjusted by gender, age and smoking being 1.80 (95% CI=1.06-3.06), especially to lung adenocarcinoma (OR being 2.95 [95% CI=1.39-6.23]). After stratified analysis of smoking history and adjusting by gender and age, it was revealed that non-C4268/C genotype was associated with significantly increased risk of lung cancer in non-smokers and light-smokers groupq with OR = 2.12 (95% CI = 1.03-4. 36) and OR = 3.75 (95% CI = 1.15-12. 22), respectively. Conclusion: C4268/C genotype may be a protective factor in lung adenocarcinoma patients and may decrease the risk of lung cancer in non-smokers and light-smorkers.

Objective To observe the effects of basic fibroblast growth factor (bFGF) on osteogenic differentiation abili?ty and cell proliferation of human gingival fibroblasts (HGFs), and to explore the role of bFGF on the process of osteogenic differencitiaion in vitro. Methods HGFs were cultured in vitro until the 3rd passage when they were divided into four groups:normal medium as group 1, normal medium with 10μg/L bFGF as group 2, osteogenic medium as group 3 and osteo?genic medium with 10μg/L bFGF as group 4. MTT assay was used to evaluate the proliferation of HGFs. Alkaline phospha?tase (ALP) staining and Alizarin red staining were applied to investigate osteogenic potential of HGFs under different culture conditions. Results bFGF at concentration of 10 μg/L could increase HGFs proliferation in both normal and osteogenic medium (P<0.01). HGFs could be induced towards osteogenic differentiation and form mineralized nodule in osteogenic me?dium. However, 10μg/L bFGF had no effects on ALP activity and mineralized nodule formation of HGFs during osteogenic differentiation. Conclusion bFGF could promote the proliferation of HGFs but show no effects on osteogenic differentiation of HGFs at concentration of 10μg/L.