Five strains out of the 8 of epidermic hemorrhagic fever(EHF)virus isolated from the serum of the acute phase of EHF patients in Nanchong, Sichuan were found to have cytopathogenic effect(CPE)through 4th to 10th passages in Vero-E6 cell culture. The biological, physico-chemical and antigenic characteristics of HFN-04 and HFN-19, 2 out of the 5 CPE strains, were identified. The results were as follows;( 1 ) The CPE development and the dynamic proliferation of the virus areconsistent. ( 2 ) The main biological and physico-chemical characteristics of the 2 CPEstrains arc the same as those of EHF virus.( 3 ) When paired samples of EHF patients' serum were tested with the slide antigens of E6 cells infected with these CPE strains, all the convalescent serum demonstrated an increase by 4 fold or more of the IFA. titer.( 4 ) The CPE of the virus can be neutralized by EHF patient's serum or EHF and KHF antisera, but not by normal rabbit serum or the multivalent serum of Reovirus type 1-3.( 5 ) The E6 cells infected by CPE strains of virus can almost fully absorbthe specific antibodies in EHF patients or in EHF and KHF antisera.( 6 ) The suspension of the mouse brain infected by CPE strains can formpositive agglutination reaction with the sentitized blood cells by EHFvirus strain A9 McAb 25-1.On the basis of our observation, it can be concluded that at least certain strains of EHF virus can produce CPE in Vero-E6 cell culture.

Objective To study the HLA-DRB1 genotype and their r elation with HBV infection among Han patients in shanxi area. Methods HLA-DRB1 genotyping was conducted in 54 patients HBV infection and 108 health controls, as well as 32 asymtomatic HBsAg carriers by using polymerase ch ain reaction/sequence specific primer (PCR-SSP) method. All the patients, asy mtomatic HBsAg carriers, and healthy subjects were inhabitants of Shan'xi area o f Han nationality. The association between HLA-DRB1 genotype and different repl ication of HBV were also studied. Results DRB1*04,DRB1*09,DRB 1*12, DRB1*15 were the most common genotypes in the Shan'xi Han inbabitants wit h the frequency of 16.2%,12.5%,11.6% and 13.4% respectively. Compared to 108 healthy controls, the allele frequency of HLA-DRB1*03 was 11.1% in HBV patien ts versus 3.7% in healthy controls, with odds ratio=3.57 and Pc=0.014 ( P

This paper is to report our study of using single radical hemolysis(SRH) technique to detect the specific antibody for Japanese B encephalitis (JBE) virus in 101 samples of pigs' serum at Chongqing area. It was found that SRH was more sensitive and more specific in the detection of the JBE virus antibody in the pig's serum than CF or HI. SRH is simple in its technique and easy to perform. In addition, it is very sensitive and specific and it can be reproduced easily. It is suggested that SRH be used in clinical diagnosis and in seroepidermic survey of JBE virsus infection.

Hemorrhagic fever with renal syndrome (HFRS) occurs endemically in certain localities in our country.At present, the diagnostic method usually used is indirect flurorescent antibody (IFA) technique, but due to the requirement of costly equipments and trained technicians, it is not feasible in grass-root clinics. We used an indirect peroxidase antibody method (IPA) to detect HFRS specific IgM. and their results were compared with that of IFA. It was found that the IPA titre was 2.6 times higher than IFA in sera of early cases, and 20 times higher than IFA titers in convalescent sera. Of the 49 sera tested. 40 gave a positive result by IPA. 35 positive by IFA. There was discrepancy between IPA and IFA in 1 serum. Only ordinary light-microscope is necessary to perform IPA test, and the test is sensitive, specific, and easy to perform. The procedure is simpler and can be used in grass-root medical units

Target of the treatment for advanced pancreatic carcinoma is always palliative without prolongation of survival time almost, therefore the aims of treatment should be concentrated on improving the quality of life and alleviateing the disease-related symptoms. We do not call for the treatment and medicines that can incur obvious adverse reaction with limited effectiveness. Interventional therapy provides superexcellent short term efficacy with alleviating the disease-related symptoms significantly, and without severe side effects and thus coincides to the principle of the treatment for advanced pancreatic carcinoma. The surpassing advantages provide popular recommendation for this very kind of therapy in the recent years.

Objective To evaluate the efficacy of transarterial interventional therapy (TAIT) in treating patients with metastatic liver cancer, and to investigate the factors influencing the prognosis of patients. Methods From January 1997 to June 2000, 470 patients with metastatic liver cancer had undergone TAIT 1231 times in the Cancer Hospital of the Chinese Academy of Medical Sciences. The clinical data of the patients were retrospectively analyzed. The short-term and long-term efficacy and the side effect of TAIT were assessed. The potential factors influencing the prognosis of the patients were determined by Cox regression analysis. Results Complete remission was observed in 94 patients, and partial remission in 143. The total effective rate was 50.4% (237/470). The median survival time was 13.5 months. The O. 5-, 1-, 2-, 3-, 5-year survival rates were 86.4%, 66. 8%, 35.6%, 16.9%, 7.3%, respectively. No severe complication occurred. The factors influencing the prognosis of the patients were: the resection of the primary tumor, blood supply of the tumor, multiple metastases of liver cancer, thrombus in the portal vein, adjuvant chemotherapy after TAIT, tumor originated from breast cancer, tumors invading multiple lobes, concurrent metastasis in other sites (X2= 17. 322, 12. 593, 8.721, 8.573, 8.492, 7. 838, 5. 623, 5. 463, P < 0.05). Conclusions TAIT is an effective palliative therapy for metastatic liver cancer which cannot be resected. The factors mentioned above influence the prognosis of patients after TAIT.

In this paper, a newly-designed device is introduced, which uses non-dispersive infrared absorption technique to acquire anesthesia gas concentration signal and to perform side-stream measurement in the air way. The microcontroller is adopted to implement data acquisition, data processing and then to transmit the data to the PC screen, thus the real-time continuous invasive concentration monitoring of the anesthesia gas in the patient's respiratory air can be realized during a surgical operation.

The teaching methods were explored to improve the quality of medical genetic teaching for foreign students according to the common problems during the teaching process. The negative effects of communication barriers in medical genetic teaching could be reduced by interactive teaching or problem-based learning in groups,in which the ability to resolve problems by themselves could be improved. In order to improve the teaching systematicness and teaching quality,the teaching contents in class should be from simple to deep,covering genetic laws,pathogenesis,diagnosis and control measure of genetic diseases. From the perspective of practical application and combining with the construction of self-de-signed teaching textbook and cases, the quality of medical genetic teaching ultimately could be further improved.

Objective: To design the ribozymes to cleave human TIMP 1 mRNA, and embed them into U 6snRNA to make them stable. Methods: Ribozymes were designed according to the “hammerhead structure” described by Symons.Computer was used to analyze the possible cleavage sites. Results: Three ribozymes targeting the nt123, nt299 and nt353 on TIMP 1 mRNA were designed. Embedding ribozyme in U 6snRNA had little effect on its binding with the substrate. Conclusion: Computer assisted design is indispensable in studying ribozyme. Embedding ribozymes in U 6snRNA may be a good way to solve the problems existing in ribozyme study. [

Objective To investigate the clinical efficacy of transarterial chemoembolization (TACE) combined with sorafenib for the treatment of inoperable hepatocellular carcinoma (HCC), and to discuss the influence of treatment interval on the survival time. Methods During the period from July 2008 to May 2011 at authors’ hospital, a total of 50 patients with inoperable HCC were treated with TACE together with sorafenib. The treatment intervals between each TACE procedure were recorded. The results were analyzed. Results Up to Dec. 31, 2011, the median follow-up time of the 50 patients was 310 days. The mean interval between TACE treatments was 69 days before the combination treatment was employed , while the mean interval was 112 days after the combination treatment started , and the longest interval was 648 days. Conclusion Combination treatment TACE with sorafenib can remarkably prolong the treatment interval in patients with inoperable HCC, thus the patient can get more survival benefits.