Hepatitis B is a serious hazard to human health.This paper describes the current clinical use of several nucleoside antiviral drugs combination,and introduces the candidate drugs which are able to effectively inhibit the hepatitis B virus replication in vivo and in vitro in two years,which provides reference for the research and development of new anti-HBV drugs.

?AIM: To discuss the application of anterior segment optic coherence tomography ( AS-OCT ) in the diagnosis of corneal ulcer.?METHODS: The cross linear scan was used in 88 patients ( 88 eyes ) with corneal lesion by AS-OCT to gather the image data, observe the pathological changed tissue by measuring all layers for patients with initial inspection, providing important visual images and data for treatments. All the patients were followed up for 2mo.?RESULTS:Clear images with structure of all layers were obtained. It can provide the intuitive image data and scan the same position and show the changes during the treatment.?CONCLUSION: AS-OCT can discover the important condition immediately. It also can monitor course of disease dynamically, provide the intuitive image data for clinical treatment.

Objective To investigate the effect of trichostatin A (TSA) and 5-azacitidine (5-AzaC) on pancreatic β-cells impaired by cytokine,via measuring the proliferation,apoptosis,and function of pancreatic β-cells.Methods RIN-m5f was impaired by interleukin-1β and interferon-γin vitro,and treated with TSA and 5-AzaC.Experiment groups included blank control group,cytokine induction group,0.05/0.10 μmoL/L TSA group,0.63/1.25 μmoL/L 5-AzaC group,and0.10 μmol/L TSA plus 1.25 μmol/L 5-AzaC group.The viability of RIN-m5f cells was detected by MTT assay.Apoptotic rate was determined by Annexin V-fluorescein isothiocyanate (FITC) /propidium iodide flow cytometry.Insulin secretion was measured by enzyme-linked immunosorbent assay.Results The viability of RIN-m5f cells in 0.05/0.10 μmoL/L TSA group,0.63/1.25 μmol/L 5-AzaC group,and 5-AzaC plus TSA group was 70.1％/79.2 ％,67.3 ％/82.9 ％,and 89.1％ respectively,being higher than that in the cytokine group (33.9％,P＜0.05) ; the apoptosis rate was 10.3％/10.5％,7.9％/9.6％,and 8.2％,being lower than that in the cytokine group (16.6％,P＜0.05) ; the capacity of glucose-stimulated insulin secretion of all the treated groups was higher than that in the cytokine group (P＜0.05).Conclusion TSA and 5-AzaC might promote the proliferation of pancreatic β-cells impaired by cytokines,inhibit its apoptosis and recover its insulin secretion.

Adolescent ; Adult ; Blood Transfusion ; Child ; Child, Preschool ; Female ; Humans ; Male ; Middle Aged ; Pesticides ; poisoning ; Poisoning ; therapy ; Treatment Outcome

Objective: To investigate the correlation of MDM2 SNP309 polymorphism with breast cancer risk in Chinese women. Methods: The polymorphism of MDM2 SNP309 was detected by PCR-restriction frag-ment length polymorphisms assay (PCR-RFLP) in 698 women with primary breast cancer and 525 healthy controls. Results: Compared with the T/T genotype, the G allele (T/G or G/G) was not associated with an in-creased risk of breast cancer in the entire population studied (T/G, adjusted OR=1.2, 95% CI: 0.8-1.6, P=0.30; G/G, adjusted OR=1.0, 95% CI: 0.7 ～ 1.5, P=0.88). Among postmenopausal women, the G allele (T/G or G/G) was significantly associated with an increased risk of breast cancer (T/G, adjusted OR=1.8, 95% CI:1.2～3.0, P=0.011; G/G, adjusted OR=1.9, 95% CI: 1.2～3.3, P=0.014). But this association was not ob-served among premenopausal women. Conclusion: MDM2 SNP309 heterozygous T/G genotype and homozy-gous mutant GIG genotype increase breast cancer risk in postmenopausal Chinese women.

OBJECTIVETo design a device for direct vision intracardiac operation without cardiopulmonary bypass, and assess its applicability preliminarily.

METHODSThe device was designed according to the clinical needs of intracardiac operation and used in operations for repairing atrial septal defect in 5 ex vivo porcine heart models. The practical applicability of this device was thoroughly tested and the results of the operations were evaluated.

RESULTS AND CONCLUSIONDirect vision operation for repairing atrial septal defect was successfully performed using this device, which can be a well applicable in some intracardiac operations, but its clinical effects need further evaluation.

Animals ; Cardiac Surgical Procedures ; instrumentation ; methods ; Cardiopulmonary Bypass ; Heart Septal Defects, Atrial ; surgery ; In Vitro Techniques ; Swine

OBJECTIVETo explore the impact of 5-fluorouracil (5-FU) on glucose metabolism and pancreatic pathology.

METHODSTwenty Wistar rats were divided into 5-FU group(n=10, chemotherapy was administered intraperitoneally to animals at a dose of 20 mg/kg daily for continuous 5 days) and control group (n=10, sodium chloride was administered intraperitoneally to animals with the same dose at the same time ). Glucose tolerance was evaluated 2 and 7 days following 5-FU treatment by serial measurement of blood glucose before and after an oral glucose load. Plasma insulin concentration was determined by radioimmunoassay. Pancreatic pathology was examined with morphological method and the ultrastructural changes of β cells were observed by transmission electron microscope.

RESULTSFasting blood glucose level was significantly higher in the 5-FU group than that in the control group [(7.6±0.9) mmol/L vs. (4.6±0.6) mmol/L at day 2; (8.9±1.0) mmol/L vs. (4.7±0.6) mmol/L at day 7, P<0.01]. Insulin releasing test indicated that the early phase insulin response to glucose load was significantly diminished in animals treated with 5-FU at day 2. Insulin level was significantly lower in the 5-FU group than that in the control group at 30 min (P<0.01). The peak secretion time of plasma insulin in 5-FU group was at 60 min, similar to the control group; and plasma insulin level decreased more slowly. Plasma insulin level was higher in 5-FU groups than in control groups on 120 min and 180 min. At day 7, Insulin level was lower in the 5-FU group than that in the control group on 60 min, and the peak secretion time of plasma insulin was delayed to 120 min. Plasma insulin level was significantly increased in 5-FU group than that in control group on 180 min(P<0.01). No gross histopathological damage to the pancreas was observed at day 2 and 7 following administration of 5-FU. The structural changes of mitochondria were mainly the quantities of secretory granule diminished at day 7 under transmission electron microscope. Dilated rough endoplasmic reticula, swollen mitochondria, and the presence of adipose drops in lysosomes were found in few cells.

CONCLUSIONS5-FU-induced hyperglycemia appears to be mediated in part by a relatively deficient insulin secretion to glucose stimulation. A relative deficiency in insulin secretion following 5-FU treatment appears to be related to β cells function impairs with islet cell ultrastructural changes induced by 5-FU.

Animals ; Blood Glucose ; drug effects ; metabolism ; Female ; Fluorouracil ; pharmacology ; Insulin ; blood ; Male ; Pancreas ; drug effects ; pathology ; Rats ; Rats, Wistar

Animals ; Carcinoma, Hepatocellular ; genetics ; metabolism ; virology ; Genes, p53 ; Hepatitis B ; genetics ; metabolism ; virology ; Hepatitis B virus ; Humans ; Inhibitor of Growth Protein 1 ; Intracellular Signaling Peptides and Proteins ; metabolism ; Liver Neoplasms ; genetics ; metabolism ; virology ; Loss of Heterozygosity ; Nuclear Proteins ; metabolism ; Point Mutation ; Signal Transduction ; Trans-Activators ; genetics ; metabolism ; Tumor Suppressor Protein p53 ; genetics ; metabolism ; Tumor Suppressor Proteins ; metabolism

BACKGROUNDMutations in mitotic checkpoint genes have been detected in several human cancers, which exhibit chromosome instability. We wanted to know whether mutation of hBub1 could occur in transformed human embryo lung fibroblasts (HELF) cells induced by a chemical carcinogen.

METHODSHELF cells were transformed by N-methyl-N'-nitro-N-nitrosoguaridine (MNNG), and three flasks of transformed HELF cells (named as T1, T2, and T3) were selected as amplifiers, and mutations of hBub1 in these transformed cells were analyzed by PCR-SSCP and sequencing.

RESULTSIt was found that any one of three transformed cell lines exhibited aneuploidy with a low mitotic checkpoint function. Subsequent PCR-SSCP and sequence analysis showed an AGT to CGT or ATT mutation at codon 80 in hBub1 gene in T1 cells with a resultant change in amino acid sequence.

CONCLUSIONOur study demonstrated that the mitotic checkpoint genes could be targets of MNNG.

Cell Line, Transformed ; Chromosome Aberrations ; Down-Regulation ; Fibroblasts ; drug effects ; Humans ; Lung ; cytology ; Methylnitronitrosoguanidine ; toxicity ; Mitosis ; drug effects ; Mutation ; Protein Kinases ; genetics ; Protein-Serine-Threonine Kinases

AIM To explore the effects of Bushen Huoxue Recipe (Fluoritum,Psoraleae Fructus,Cuscutae Semen,etc.) on the protein expressions of transforming growth factor (TGF)-β1,TGF-βRⅡ and Smad2/3 in follicle wall granulosa cells in mice with autoimmune premature ovarian failure (POF).METHODS Balb/c female mice were subcutaneously injected with mouse zona pellucida 3 at multiple points to establish autoimmune POF model.POF mice were divided into model group,positive group (progynova),low-,middle-and high-dose of Bushen Huoxue Recipe groups.After intervention for 30 days,ovarian tissue was stained by hematoxylin-eosin (HE),and the protein expressions of TGF-β1,TGF-βRⅡ and Smad2/3 in follicle wall granulosa cells and ovarian tissue were detected by immunohistochemistry and Western blot,respectively.RESULTS Compared with the model group,the number of mature follicles in the Bushen Huoxue Recipe groups and the positive group was obviously increased,together with the decreased number of atretic follicles.The protein expressions of TGF-β1,TGF-βRⅡ and Smad2/3 in follicle wall granulosa cells and ovarian tissue in the Bushen Huoxue Recipe groups and the positive group were much higher than those in the model group (P ＜ 0.05).CONCLUSION Bushen Huoxue Recipe can improve ovarian function by up-regulating the protein expressions of TGF-β1,TGF-βRⅡ and Smad2/3 in granulosa cells.