To investigate the expression of the HO-1 gene in PC12 cells in hypoxic environment and gain further insight to the role of HO-1 in cerebral ischemia, PC12 cells were exposed to hypoxia environment (95% N2, 5% CO2) for 0.5 h, 1 h, 4 h, 8 h, 12 h, 24 h respectively. The level of HO-1 mRNA was examined by reverse transcriptase polymerase chain reaction (RT-PCR); the volume of COHb in the media were measured spectrophotometrically and the cGMP concentration of PC12 cell extracts was determined by radioimmunoassay. We found that after exposure to hypoxia for 1 h, 4 h, 8 h, 12 h, 24 h, HO-1 mRNA increased by 3%, 4%, 17%, 31% 36% as compared with that in control group respectively (P < 0.01 or P < 0.05); the COHb increased by 12%, 29%, 59%, 88%, 94% as compared with that in control group respectively (P < 0.01 or P < 0.05), and the cGMP concentration were 2.2, 3.4, 5.2, 8.1, 10.9-fold as that of the control group (P < 0.01). We are led to conclude that hypoxia induced the expression of HO-1 gene, the production of endogenous CO, and the concentration of cGMP was elevated as well.
Carbon Monoxide/metabolism ; Cell Hypoxia ; Cyclic GMP/metabolism ; Heme Oxygenase (Decyclizing)/biosynthesis ; Heme Oxygenase (Decyclizing)/*genetics ; Heme Oxygenase-1 ; PC12 Cells ; RNA, Messenger/biosynthesis ; RNA, Messenger/genetics ; Up-Regulation

Over-expression of APP and Swedish mutation could cause some familial early onset AD. In this study, a primary screening was conducted of effective small interference RNAs (siRNAs) targeted wild type APP (APPwt) and Swedish mutant APP (APPswe). One siRNA targeting APPwt and the other siRNA targeting APPswe were designed. All these siRNAs were endogenously expressed by siRNAs expressing plasmids. COS-7 cells were transiently co-transfected with APP-GFP recombinant plasmids and siRNA expression vector. The silencing effect of each siRNA was quantitatively assessed by the level of expression of green fluorescent protein (GFP). It was found that the siRNAs silenced APPwt and APPswe to different degrees. siRNA directed against APPswe was more effective in suppressing the expression of fusion gene of APPswe than that of APPwt. The silencing effect of siRNA directed against APPswe indicating allele-specific silencing property of the siRNAs. Therefore, siRNAs directed against APP play an important role both in the therapeutic study of Alzheimer disease and functional exploration ofAPP gene.

Objective To evaluate the prognostic value of the extracapsular spread (ECS) of regional lymph nodes in nasopharyngeal carcinoma (NPC) based on magnetic resonance imaging.Methods A retrospective review was performed for 477 previously untreated patients with NPC who were treated in Yuebei People′s Hospital from January 2009 to December 2013.Univariate and multivariate survival analyses were performed to identify the prognostic value of ECS in NPC.Results There were 216 patients with ECS and 261 patients without ECS,and the median survival of the two groups of patients was 38.5 months and 39.0 months,respectively.The 3-year overall survival (OS),progression-free survival (PFS),local recurrence-free survival (LRFS),and distant metastasis-free survival (DMFS) rates of the patients with ECS versus those without ECS were 81.9% versus 90.7%,65.8% versus 85.0%,87.8% versus 95.8%,and 80.3% versus 92.9%,respectively (all P=0.000).The univariate analysis showed that N stage and ECS were important prognostic factors for OS,PFS,LRFS,and DMFS in NPC patients (P=0.000-0.004),and T stage and TNM stage were associated with OS,PFS,and DMFS (all P=0.000).The multivariate analysis using the Cox regression model showed that T stage was an independent prognostic factor for the survival of NPC patients,and ECS was an important prognostic factor for PFS,LRFS,and DMFS.Conclusion ECS of regional lymph nodes is a risk factor for local recurrence or distant metastasis in patients with NPC.

Objective The results and side effects of nasopharyngeal carcinoma treated by combined external radiotherapy and Californium -252 neutron after loading intracavitary radiotherapy. Methods From November 2005 to March 2007, 30 nasopharyngeal carcinoma patients with staged T1 and T2 by 1992 Fuzhou staging system, were treated by external beam radiotherapy combined with Californium-252 neutron after loading intraeavitary radiotherapy. Results All patients were followed up for 2 years. 2 cases recurred in the nasopharynx. 4 cases developed distant metastases. 2 cases developed trismus. No perforations in hand and soft palate occurred. Conclusion External beam radiotherapy combined with Californian-252 neutron after loading intracavitary radiotherapy for nasopharyngeal carcinoma is indicated for boosting the dose to the nasopharyngeal cavity; reducing the dose for external irradiation. It can improve local control rate of nasopharyngeal carcinoma and reduce occur rate for the trismus.

Objective To study the mini-invasive surgical treatment for cholelithiasis disease in the primary hospital. Methods Laparoseope,duodenoscope and choledochoscope were combined to treat 293 cases with cholelith-iasis which included 2 cases cholecystolithisasis, 131 cases were cholecystolithiasis with secondary choledocholith,28 cases with primary choledocholith,39 cases with calculus of intrahepatic duct,93 cases with calculus of intrahepatic or extrahepatic duct. Results The program had minor trauma, mild suffering, and less operative complications,compared with traditional open operations. Conclusion The combined treatment of laparoscopy, duodenoscopy, choledochoscope and surgery for the cholelithiasis in the primary hospital is feasible, safe and effective.

To investigate the expression of the HO-1 gene in PC12 cells in hypoxic environment and gain further insight to the role of HO-1 in cerebral ischemia, PC12 cells were exposed to hypoxia environment (95% N2, 5% CO2) for 0.5 h, 1 h, 4 h, 8 h, 12 h, 24 h respectively. The level of HO-1 mRNA was examined by reverse transcriptase polymerase chain reaction (RT-PCR); the volume of COHb in the media were measured spectrophotometrically and the cGMP concentration of PC12 cell extracts was determined by radioimmunoassay. We found that after exposure to hypoxia for 1 h, 4 h, 8 h, 12 h, 24 h, HO-1 mRNA increased by 3%, 4%, 17%, 31% 36% as compared with that in control group respectively (P < 0.01 or P < 0.05); the COHb increased by 12%, 29%, 59%, 88%, 94% as compared with that in control group respectively (P < 0.01 or P < 0.05), and the cGMP concentration were 2.2, 3.4, 5.2, 8.1, 10.9-fold as that of the control group (P < 0.01). We are led to conclude that hypoxia induced the expression of HO-1 gene, the production of endogenous CO, and the concentration of cGMP was elevated as well.
Animals ; Carbon Monoxide ; metabolism ; Cell Hypoxia ; Cyclic GMP ; metabolism ; Heme Oxygenase (Decyclizing) ; biosynthesis ; genetics ; Heme Oxygenase-1 ; PC12 Cells ; RNA, Messenger ; biosynthesis ; genetics ; Rats ; Up-Regulation

Over-expression of APP and Swedish mutation could cause some familial early onset AD.In this study, a primary screening was conducted of effective small interference RNAs (siRNAs) targeted wild type APP (APPwt) and Swedish mutant APP (APPswe). One siRNA targeting APPwt and the other siRNA targeting APPswe were designed. All these siRNAs were endogenously expressed by siRNAs expressing plasmids. COS-7 cells were transiently co-transfected with APP-GFP recombinant plasmids and siRNA expression vector. The silencing effect of each siRNA was quantitatively assessed by the level of expression of green fluorescent protein (GFP). It was found that the siRNAs silenced APPwt and APPswe to different degrees. siRNA directed against APPswe was more effective in suppressing the expression of fusion gene of APPswe than that of APPwt. The silencing effect of siRNA directed against APPswe indicating allele-specific silencing property of the siRNAs. Therefore, siRNAs directed against APP play an important role both in the therapeutic study of Alzheimer disease and functional exploration of APP gene.