It has been indicated that there are a large number of natural active compounds generating the radiosensitizing effect on tumor.According to diverse molecular mechanism,these compounds may enhance the radiotherapeutic efficacy via enhancing the radiosensitivity of tumor.Studying the radiosensitization mechanism and classifying the natural compounds with the potentiality of development into clinical radiosensitizers can provide certain ideas for further research and development of natural radiosensitizers.

Objective To investigate the role and mechanism of retinoblastoma protein-associated proteins 48 (RBBP4) in HIV-1 latency.Methods CEM-Bru cells latently infected with HIV-1 were stimulated with 25 ng/ml of tumor necrosis factor alpha (TNF-α) in combination with 10 ng/ml of interleukin-2 (IL-2).Chromatin immunoprecipitation (ChIP) was performed to detect the changes in RBBP4 and in histone deacetylases 1 and 2 (HDAC1/2) binding to long terminal repeat (LTR).Binding activities of HDAC1/2 and RNA polymerase Ⅱ (RNA Pol Ⅱ) to LTR and acetylated histone H3 at LTR region were detected by ChIP after partially interfering the expression of RBBP4 in CEM-Bru cells with electroporation.Initiating and elongated transcripts were measured by RT-PCR.Results The binding activities of RBBP4 and HDAC1/2 to LTR in HIV-1 latently infected cells were enhanced significantly as compared with those in TNF-α and IL-2 co-stimulated cells.Fewer RBBP4 and HDAC1/2 bound to LTR following the interference of RBBP4 expression, which was accompanied with enhanced histone acetylation and strengthened binding activity of RNA Pol Ⅱ to LTR.Moreover, more initiating transcripts were detected in HIV-1 latently infected cells after the RBBP4 expression was interfered by electroporation.Conclusion RBBP4 contributes to the maintenance of HIV-1 latency, in which HDAC1 and HDAC2 might be involved.

Objective To compare the difference of ELISA and LABScreen in detecting HLA antibodies and evaluate their effects on allograft rejection.Methods Consecutive patients undergoing kidney transplantion from November,2008 to December,2009 in the First Affiliated Hospital and the following up patients during the same period,with abnormal Scr who had completed kidney biopsies,were included in this study.Patients' HLA antibodies were detected by ELISA (Lambda antigen tray,LATTM) and LABScreen Mix Beads (LABScreen MIX,One Lambda,Canoga Park,CA,USA) or LABScreen Single antigen beads (LABScreenTM single antigen beads,One Lambda,Canoga Park,CA,USA).Patients' Scr were also detected at different time potints.Results There were 277 patietns included.Among them 145 (52.3％) cases were HLA antibody positive detected by LABScreen,which including 118 cases ELISA negative but LABScreen positive,and 27 cases both ELISA and LABScreen positive.No case was ELISA positive but LABScreen negative.Among 118 cases which were LABScreen positive but ELISA negative,41 (34.7％) cases happened acute or chronic rejection.However,only 24 cases happened rejection in 132 double negative cases (18.2％,P =0.003).There were 31％ patients in rejection group while only 12.8％ patients (P=0.01) in non-rejection group whose HLA antibody fluorescence intensity detected by LABScreen single antigen beads still increased two weeks after transplantation.Conclusion LABScreen is more sensitive than ELISA in detecting HLA antibodies,and its result highly correlates with the incidence of allograft rejection.

Objective To Study the effect of thyroid peroxidase-Ab (TPO-Ab) on in vitro fertilization and embryo transfer (IVF-ET) ending. Methods From March 2011 to October 2013, a total of 378 assisted reproduction cycles in Reproductive Medical Center of Qinghai Provincial People ’s Hospital were retrospectively analyzed in. Experiment group included 69 cycles from patients with positive thyroid peroxidase antibody and normal thyroid function and control group 309 cycles from those with negative thyroid peroxidase antibody and normal thyroid function. Results IVF fertility rate (79.76%) and high quality embryo rate (46.59%) in experiment group were significantly lower than those in control group (84.08%, 54.49% respectively) and the difference was statistically significant (P < 0.05); abortion rate (33.33%) in experiment group was obviously higher than that in control group (16.11%), which was statistically significant (P < 0.05). Conclusion Positive thyroid peroxidase antibody exerts adverse effects on IVF-ET ending since TPO-Ab reduces IVF fertilization rate and high quality embryo rate and increases the rate of abortion.

Objective To explore the effect of ultrasound-guided stellate ganglion block (SGB) in the incidence of postoperative headache, nausea and vomiting in conventional thyroidectomy. Methods Ninety patients undergoing conventional thyroidectomy were randomly allocated to three groups with 30 patients in each group. In group L, SGB was performed with 5 ml 0.5% lidocaine; in group N, SGB was performed with 5 ml 0.9% sodium chloride; and in group C, no prior block was performed. Postoperatively, during the 48 h after surgery, every episode of postoperative headache and postoperative nausea and vomiting was recorded and a safety assessment was performed. In group L and group N, the hemodynamic status of the vertebral artery and carotid artery was recorded before and after the SGB was performed. In group C, the hemodynamic status of the vertebral artery and carotid artery was recorded before and after the neck was in the full extension position. Results One patient of group N and one patient of group C was discharged. During the 48 h after surgery, headache occured in 5 patients (16.7%) of group L, 8 patients (27.6%) of group N, and 17 patients (58.6%) of group C, and the headache rate in group C was significantly higher than that in group L (P=0.0007). The headache mostly occurred at 2 h and 4 h after operation. During the 48 h after surgery, nausea and vomiting occured in 8 patients (26.7%) of group L, 11 patients (37.9%) of group N, and 20 patients (60.9%) of group C, and the nausea and vomiting rate in group C was significantly higher than that in group L (P=0.0017) and group N (P=0.0343). The nausea and vomiting mostly occurred at 2 h and 4 h after operation.In group L and group N, and the inner diameters of the vertebral and carotid arteries after SGB were wider than those before SGB (P<0.05). In group C, the inner diameters of the vertebral and carotid arteries after the neck extension position were narrower than prostration position (P<0.05). No side effects were observed during or after SGB. Conclusions Preoperative SGB performed with 5 ml 0.5%lidocaine is an effective technique for reducing postoperative headache and nausea and vomiting after thyroidectomy.

After-class reading is one of the important activities in the college students' spiritual life.The interests,sorts of books,contents and quantities of their reading can reflect their ideological conditions and their value judgment.Based on the investigation and analysis on their after-class reading activities,we can discover problems and give appropriate guidance in time,hoping to promote the cultivation of good after-class reading atmosphere on campus. The results of this survey can provide reference for the humanistic quality education of medical students.

With social progress and improvement of human health consciousness,the medical device industry of China has been fast developing,and a new request for the specialized talents cultivation has been put forward.Based on the consideration of the development of medical device industry and the students,a cultivating mode for the medical engineering talents is explored in this paper through the major course reform,training double-quality teachers and cooperation between industry,university and research institutes.

Objective To study the prevention and treatment of chylous leakage after Whipple operation.Methods Clinical data of 381 patients underwent Whipple operation from Jan 2010 to march 2013 were retrospectively analyzed.Results Among 381 patients,23 patients had chylous leakage,the incidence was 6.04％.While in 89 patients,in which intraoperative precautionary physical ligation or mattress suturing of the lymphatic vessels were undertaken,no chyle leakage occurred ; Most of chyle leakage occurred in malignant tumor after radical resection(21 patients),most chylous leakage was found 5-8 days after surgery,with daily volume of 260-450 ml.All patients of chylous leakage were cured by conservative treatment.Conclusions Chylous leakage are common in PD.Intraoperative preventive measures such as lymphatic duct ligation or safe suturing can effectively prevent chyle leakage.Conservative therapy heals most chylous leakage after Whipple operation.

Burnout, Professional ; Humans

Acute Disease ; Adolescent ; Adult ; Electromyography ; Female ; Humans ; Male ; Middle Aged ; Nervous System Diseases ; chemically induced ; diagnosis ; Organophosphate Poisoning ; Pesticides ; poisoning