Objective:To investigate the clinical efficacy of deliberate hypotension with remifentanil in endovascular treatment of intracranial aneurysms.Methods:A total of 30 cases of intracranial aneurysms,were divided according to the condition of combined with hypertension,into control group(Group C) and hypertension group(Group H),each with 15 cases.Two groups adopted induction of anesthesia in patients with intravenous propofol 1.5～2mg/kg,remifentanil 1?g/kg,vecuronium 0.1mg/kg.Maintenance of anesthesia:propofol 3~5mg/(kg?h) and remifentanil 0.2～0.4?g/(kg?min),and intermittent intravenous injection of vecuronium 0.06mg/kg maintained muscle relaxation.When controlled hypotension was needed,the infusion of remifentanil to accelerated 0.8?g/(kg?min).Heart rate and blood pressure were recorded at baseline,after anesthesia induction,on tracheal intubation,before intracranial aneurysm embolism,after intracranial aneurysm embolism and extubation.Results:After induction of anesthesia,there were obvious decline in blood pressure and heart rate in both group(P

Blood transfusion in liver surgery still plays an important role.However,blood transfusions may cause immunosuppression recipients and hinder the body' s immune response against the tumor,promotes tumor metastasis and recurrence.How to resolve this contradiction? We must study and research the effects of allogeneic blood transfusion on liver cancer metastasis and recurrence after hepatic resection,and to find strategies to improve the liver cancer prognosis.

Objective To summarize the experience of partial splenctomy in patients with traumatic spleen rupture.Methods Patients were assigned to spleen conservation group in which 59 patients underwent partial splenectomy,control group Ⅰ in which 60 patients underwent splenectomy and control group Ⅱ in which 60 patients underwent gastroinestinal operation. Immunologic function and filtration of red blood cell were detected in the three groups during the preoperation and the first month,the first year postoperation respectively.Results There was no significant difference between the spleen conservation group and the gastroenteric operation group.But IgM,NK-cell activity,T lymphocyte subpopulation and T lymphocyte transformation rate in the spleen conservation group were significantly higher then those in the splenectomy group (P

Objective To study the effect of transfection with antisense DNMT3b gene eukaryotic expression plasmid on the growth of human cholangiocarcinoma cell line QBC939,and to explore the role of DNMT3b in the cholangiocarcinoma tumorigenesis.Methods The constructed antisense DNMT3b gene eukaryotic expression plasmid was transfected into QBC939 cells using liposome.The expression level of DNMT3b protein was detected by Western blot after stable transfection.The growth curves of transfected cells and un-transfected cells were observed by MTT method respectively.The cell proliferation ability was also observed by the test of colony formation in soft agar.The alterations of the cell cycle and the apoptosis rate were detected by FCM.Results Following the transfection,the protein level of DNMT3b decreased significantly;transfection with antisense DNMT3b gene eukaryotic expression plasmid did not affect the cell growth curve of QBC939,and did not decrease the cell colony formation rate(P=0.717);transfection with antisense DNMT3b gene also did not result in cell cycle alterations or induce cell apoptosis(P=0.089).Conclusions Transfection with antisense DNMT3b gene eukaryotic expression plasmid can down-regulate the expression level of DNMT3b in QBC939.It can not affect the growth and proliferation of human cholangiocarcinoma cell line QBC939,nor alter the cell cycle and induce cell apoptosis.

OBJECTIVE:To study the effects of topirmate on proliferation of neural stem cells in vitro.METHODS:Primary neural stem cells from newborn mice were cultured.The neural stem cells were incubated together with topiramate at 0.4,2 or 10 ?mol?L-1.A vehicle control and positive control were set up,respectively.The quantity and viability of neural stem cells newly generated were analyzed by a convert phase microscope,the neurosphere numbers were counted,and neural stem cells viability was determined and a MTT assay.RESULTS:The number of neurospheres of groups treated with topiramate at 2 and 10 ?mol?L-1 are 20.67?4.04,49.68?3.79,respectively,and the value of MTT assay of the two groups are 0.354 6?0.070 5,0.501 8?0.036 9,it was higher than the vehicle control neural stem cells(7.34?2.31、0.288 0?0.009 3,P

Objective To evaluate special diagnosis and treatment of occult breast cancer. MethodsDiagnostic means used included breast roentgenography,selective mammary ductography, fine needle aspiration and excision biopsy in 28 cases. ResultsBreast roentgenography detected 4 cases ( 7/16), selective mammary ductography identified 4 cases(4/6). The definite diagnosis rate by lump biopsy and immunohistochemistry was 10 cases (10/13). Postoperative follow-up was abtained in 18 cases,with 5 dying of recurrence or distant metastases. Among them 4 patients underwent only axillary node excision. Conclusion Nipple discharge,localized thickening the gland are very important clue to the diagnosis of occult breast cancer.Lump biopsy and immunohistochemistry is a mainstay for the final establishment of the diagnosis of breast cancer. Radical or modified radical mastectomy with adjuvant radiotherapy and chemotherapy is a suitable treatment modality for occult breast cancer.

Interferon and nucleotide/nucleoside analogues are currently widely used in the management of chronic hepatitis B virus ( HBV) infections, but are facing problems such as poor sustained virologic response, low HBsAg clearance rate and a high risk of recurrence after drug withdraw.Exploring new target of anti-HBV agent has become a hot topic in recent years.This paper reviews the research progress on new anti-HBV targets and related drugs.

BACKGROUND: Osteoporosis is a serious threat to the health and quality of life in the elderly. It is important to establish an ideal experimental animal model to study the etiology and treatment of osteoporosis.OBJECTIVE: To establish a rat model of osteoporosis induced by different dosages of retinoic acid, thus selecting the optimal dosage.METHODS: Eighty female Sprague-Dawley rats were randomly divided into control, low-, middle- and high-dosage groups based on body mass (n=20 per group), The rats in the latter three groups were induced with 80, 100, and 120 mg/(kg?d) retinoic acid via gastric lavage for 14 days.RESULTS AND CONCLUSION: Compared with the control group, the bone mineral density, number of osteoblasts and osteoclasts, and bone microarchitecture in the low-dosage group showed no significant changes, while there were significant decrease in the serum level of calcium and bone mineral density of femur, significant increase in the number of osteoclasts at the femur and significant changes in the femoral microarchitecture in the middle- and high-dosage groups, especially in the middle-dose group. To conclude, 120 mg/(kg?d) retinoic acid via gastric lavage for 14 days can induce a stable osteoporosis model in rats.

Hypermethylation of the promoter region is an important mean for the transcriptional repression of a number of cancer-associated genes, and over-expression and/or increased activity of DNA methyltransferase are considered to be the main cause of promoter hypermethylation. In order to further explore the epigenetic mechanism of tumor suppressor gene RASSF1A inactivation, 5-aza-2'-deoxycytidine (5-Aza-CdR), a DNA methyltransferase inhibitor, was used to treat the human biliary tract carcinoma cell line QBC-939 at the concentration of 5 micromol/L for 24 h in this study. After the chemical intervention with 5-Aza-CdR, the methylation status in the promoter region of RASSF1A gene was detected by methylation specific PCR (MS-PCR), and the expression alteration of RASSF1A mRNA and protein were observed by RT-PCR and Western Blot respectively. Following the treatment with 5-Aza-CdR, methylation status in the promoter region of RASSF1A gene was reversed from methylation to unmethylation. A 280 bp DNA band which represented RASS1FA expression at transcriptional level and a 40 kDa (1 kDa=0.9921 ku) protein band which represented RASSF1A expression at protein level were detected by RT-PCR and Western Blot respectively in the experimental group cells and there were no corresponding bands in the control group cells. The experimental results suggest that 5-Aza-CdR can induce demethylation in the promoter region of RASSF1A. It can also reverse epigenetic transcriptional silencing caused by DNA methylation and induce the re-expression of RASSF1A in QBC-939. This study also suggest that the mechanism of RASSF1A inactivation is very closely related to the methylation of the promoter region, which may provide a new epigenetic understanding for tumor related gene inactivation and the pathogenesis of biliary tract carcinoma.

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