Thirty New Zealand albino rabbits of both sexes were used for the experi-ments which was (1) To observe the febrile response induced by microinjection of TNFinto the lateral ventricle; (2) To measure the PGE_2 & cAMP contents of the plasma andcerebrospinal fluid. The results showed that injection of TNF (50ng/each) into the lateralventricle did induce a definite raise of body temperature (T=0.79?0.14℃). The PGE_2concentration increased markedly in c. s. f. while that in plasma remain unchanged ascompared with the control. However cAMP lever in both, plasma and c. s. f. had nochange. These results suggested that (1) The injection of TNF into the lateral ventriclecaused a raise in PGE_2 synthesis in the brain while there was no alterations of PGE_2found in peripheral blood (2) The increase in PGE_2 didn't followed by an increase incAMP which indicated that the fever induced by TNF must have a different mechanismfrom that induced by leucocyte pyrogent (LP or In-1). PGE_2 might be involved in thefever inducing mechanism but these results don't support the hypothersis that the raiseof PGE_2 level may increase the cAMP content which in turn reduced the fever.

Hypoxia-inducible factor-1 (HIF-1) is a key transciptional regulator of cellular and systemic oxygen homeostasis,composed of the two subunits,HIF-1α and HIF-1β.HIF-1α is an inducible subunit regulated by hypoxia,which is posttranslationally modified by various ways,including ubiquitination,phosphorylation,hydroxylation,acetylation and glycation,accordingly affecting its protein's stability,nuclear translocation and regulation of its target genes.Small ubiquitin-related modifier (SUMO) is an micromolecule protein participating in posttranslational modifications of proteins dynamicly in eukaryotic organism,which is similar in structure to ubiquitin.SUMOylation and deSUMOylation are involved in multiple regulations of biologic processes,such as signal transduction,transcriptional regulation,cell cycle processes and biological rhythm.SUMOylation is related to HIF-1α stability and transcription activity in hypoxia,providing a newthread to study self-regulation mechanism of HIF-1α for us.

The paper described practices in QC management pathway of death cases of the hospital.These refer to intensive education,clarification of access standard,death cases quarterly readings and administrative investigation,strict supervision among others.Authors pointed out that QC pathway can improve quality of care significantly,yet QC pathway calls for fair accountability,systemic care for patient safety,and all-staff involvement in QC improvement.

Objective To investigate radiation dose to the patients undergoing interventional radiology and make radiation risk assessment.Methods Data was collected on 198 instances of 10 interventional radiology procedures by using Philips Allura Xper FD20 DSA, which was equipped with the transparent ionization chamber system in compliance with IEC 60601-2.Patient peak skin dose and effective dose were estimated.Results Cumulative fluoroscopy time was 2.1 - 80.9 min, and number of images monitored for PSD were above 1 Gy and 79 cases monitored for E were above 20 mSv.Conclusions Substantial number of cases exceeded the dose threshold for erythema.Due attention should be paid to radiation protection of patients.

Objective To evaluate the outcomes and prognostic factors of distant metastasis in patients with advanced cervical squamous cell carcinoma treated with concurrent chemoradiotherapy (CCRT). Methods A total of 118 patients with International Federation of Gynecology and Obstetrics (FIGO, 2009 version) stageⅡb-Ⅳa cervical squamous cell carcinoma treated with CCRT between 2006 and 2010 in the Second Affiliated Hospital of Dalian Medical University were analyzed. Their median age was 48 years (range, 23-70 years). FIGO stages were as follows:Ⅱb stage 56 cases,Ⅲa stage 6 cases,Ⅲb stage 52 cases, andⅣa stage 4 cases. Of the all patients, 55 cases showed bulkly tumor (tumor size>4 cm) and 35 cases were pelvic lymph node positive. Forty patients had pretreatment hemoglobin (Hb) levels no greater than 110 g/L. Patients with elevated squamous cell carcinoma antigen (SCC-Ag) >1.5 μg/L before CCRT and at one month after CCRT were 91 cases and 34 cases, respectively. Kaplan-Meier method was used to estimate survival. For the analysis of prognostic factors affecting distant metastasis, log-rank test was used for univariate analysis, and Cox proportional hazard model was used for multivariate analysis. Results Thirty-seven patients were diagnosed with recurrence, 19 cases of whom developed distant metastasis, 13 cases developed loco-regional recurrence and 5 cases had both distant and loco-regional recurrence. The 5-year overall survival rates and distant disease-free survival of all patients were 64.0% and 78.8%, respectively. Two patients had grade 3 acute gastrointestinal toxicity (mainly diarrhea) and 20 cases had grade 3 to 4 hematologic toxicity. Seven patients experienced grade 3 to 4 late toxicity, 5 cases of them were gastrointestinal and 2 cases were genitourinary toxicity. Univariate analysis showed that FIGO stages, SCC-Ag level at one month after treatment, pretreatment hemoglobin level, and pelvic lymph node metastasis were significantly correlated with distant metastasis (all P<0.05). Multivariate analysis showed that FIGO stage, SCC-Ag level at one month after treatment, and pelvic lymph node metastasis were independent prognostic factors for distant metastasis (all P<0.05). Conclusions For stageⅡb-Ⅳa cervical squamous cell carcinoma, the regimen of CCRT was efficacious and safe. The predictive factors for distant metastasis in patients withⅡb-Ⅳa stage squamous cell carcinoma of cervix treated with CCRT included FIGO stage, SCC-Ag level at one month after treatment, and pelvic lymph node metastasis. New treatment strategies should be considered to control distant metastasis for these patients.

Objective To investigate the immunophenotypic characteristics of acute myeloid leukemia (AML)and its relationship with chemotherapy response.Methods The immunophenotyping was performrd by flow cytometry in 96 newly diagnosed AML patients.Results In 96 patients with AML,the myeloid antigens were mainly expressed including CD13(94/96,97.92％),CD117(86/96,89.58％),CD33(79/96,82.29％)respectively.The positive expression of stem/progenitor cell differentiation antigens were CD38 (92/96,95.83％),HLA-DR(72/96,75.00％)and CD34(60/96,62.50％).While CD34 and HLA-DR were fewly expressed in M3.The CD14 was only expressed in M4 and M5.The lymphocytic antigens had positive expression in the patients with AML,in which CD4 was 37.5％(36/96),CD7 was 22.92％(22/96)and CD2 was 10.42 ％(10/96).In 46 patients for treatment response analysis,total CR rate was 67.39％(31 /46).There was no significant difference of CR rates between the antigens positive group and negative group including CD33,CD117,CD11b,CD14,CD64,CD4,CD34 and HLA-DR.However,the CR rate was significantly lower in CD7 positive cases than CD7 negative ones,with statistically significance difference(P=0.01).Conclusions CD13,CD33and CD117 are the most common antigens in AML.The patients with the positive expression of CD7 have poor response to chemotherapy in AML.

Objective To establish a method to validate the result of transcriptome sequencing using duplex PCR tech -nology combined with capillary electrophoresis .Methods According to a previous study on transcriptome sequencing , eight differentially expressed genes were chosen as target genes for examination .The mRNA expression level of these genes was detected using duplex PCR combined with agarose gel electrophoresis , duplex PCR combined with capillary electropho-resis and Q-PCR, respectively.Then, the verification efficiency of each method was evaluated carefully .Results The ver-ification efficiency of duplex PCR combined with agarose gel electrophoresis was 50%, while that of duplex PCR combined with capillary electrophoresis and Q-PCR was both 100%.Conclusion Combination of duplex PCR technology with capil-lary electrophoresis can be used as an alternative method to validate the results of transcriptome sequencing .

Objective To evaluate the lung V/Q imaging in the diagnosis of chronic thromboembolic pulmonary hypertension (CTEPH).Methods Seventy-six patients (46 males,30 females,age 27-84 y) with clinically suspected CTEPH who had undergone lung V/Q imaging,CT pulmonary angiography (CTPA),pulmonary angiography (PA) and right heart cardiac catheterization were studied.The sensitivity,specificity,accuracy,positive predictive value and negative predictive value of lung V/Q imaging in detecting CTEPH were calculated and compared with those of CTPA.The x2 test was used for statistical analysis with SPSS 11.5.The distribution of involvement of segments in 47 patients with CTEPH was analyzed.Results Forty-seven patients had a final diagnosis of CTEPH and 29 had non-CTEPH etiology.The sensitivity,specificity,accuracy,positive predictive value and negative predictive value of lung V/Q imaging were 97.9％ (46/47),86.2％ (25/29),93.4％ (71/76),92.0％ (46/50) and 96.2％ (25/26),while those of CTPA were 78.7％ (37/47),93.1％ (27/29),84.2％ (64/76),94.9％ (37/39) and 73.0％ (27/37),respectively.The sensitivity (x2 =5.818,P=0.012) and negative predictive value (x2 =5.693,P =0.017) for lung V/Q imaging were significantly higher than those of CTPA.V/Q imaging could identify patients with CTEPH from those with idiopathic PAH and familial PAH based on the almost normal ventilation imaging.The lung perfusion SPECT imaging detected 585 (62.2％) of involved segments among 940 segments in 47 patients with CTEPH,with an average of 12.4 involved segments in each patient.The number of involved segments in the right lung was significantly higher than that in the left lung (36.2％ (340/940) vs 26.1％ (245/940) ; x2 =40.85,P＜0.01).Conclusions Lung V/Q imaging plays an important role in diagnosis of CTEPH and in identification of CTEPH from other types of PAH.A normal V/Q imaging can effectively exclude CTEPH.In addition,V/Q imaging can provide more diagnostic information in patients with a clinical suspicion of CTEPH who had negative results by CTPA and PA.

Objective To evaluate the sampling efficiency of rotary biopsy forceps in gastric precancerous lesions. Methods A total of 60 gastric lesions with suspected pre-cancerous characters under narrow band imaging were enrolled,and consecutive samples were taken from same lesion by one endoscopist with routine and rotary forceps,respectively. The most severe pathological diagnosis was regarded as the final diagnosis. Results There was a significant difference between rotary biopsy forceps and routine ones in regarding of sample quality and capability of minimize tissue damage (P＜0. 05). The concordance rate with final pathological diagnosis from sample taken by rotary biopsy forceps was higher than that from routine ones,but without significance (P＞0. 05). Conclusion The rotary biopsy forceps is superior to routine ones in sampling of gastric pre-cancerous lesions.