Objective To explore the T‐SPOT .TB technology in latent tuberculosis infection (LTBI) who immunosuppres‐sive therapy results in screening for latent tuberculosis infection prevention and control to provide a new basis .Methods Applica‐tion of T‐SPOT .TB kit 162 immunosuppressed patients need to be applied to detect M .tuberculosis‐specific T cells ;while doing all cases tuberculin (TST ) skin test ;of which 28 cases of T‐SPOT .TB‐positive patients before screening technique using anti‐TNF‐αbiologics were given prophylactic treatment of anti‐TB drugs for 4 months and followed a year .Results The positive rates and ac‐curacy rate of T‐SPOT .TB assay were 36 .4% and 94 .9% ,while the positive rates and accuracy rate of TSTs were 28 .4% and 69 .6% .The difference between T‐SPOT .TB assay and TST were statistical significance(P < 0 .05) .Through our 28 cases of T‐SPOT .TB positive screening technology ,prophylactic anti‐TB drugs to treat patients for 4 months and 1 year of follow‐up ,no case of tuberculosis occurred .Conclusion These results demonstrate that the performance of T‐SPOT .TB is better than the classic TST for detection of LTBI in patients receiving immunosuppressive therapy for treatment of systemic autoimmune disorders .The T‐SPOT .TB assay will be a useful tool in early and rapid diagnosis of latent tuberculosis infection .T‐SPOT .TB for LTBI patients di‐agnosed with prophylactic anti‐TB drug treatment is necessary ,has important clinical significance .

Beginning with the authors' experience in analytic-chemistry bilingual teaching,this article probes into some problems of analytic-chemistry in undergraduate education.And the authors give some beneficial suggestions in the teaching material construction,teachers training and teaching quality control.

The present situation and problems in experiment teaching of analytical chemistry were explained,and innovation was explored and practiced in the faculty of laboratory medicine,including the opitimization of teaching contents,teaching methods and score system evaluation reformation.

The academic teaching quality and experimental teaching quality of sanitary chemistry will be improved,through enriching the teacher with specialized knowledge and cultivating the creative ability of thacher and updating the teaching methods.

By evaluation of academic designed experiment performance in Bio-Analytic Chemistry from ten different evaluating indicators including literature search, experimental design, and experimental report and so on. The quantitative analysis results indicate the average is 87.8, the standard deviation is 5.0,the difficulty index is 0.88,the dipartite degree is 0.12 and the confidence coefficient of the assess is 0.9423. The designed experimental assessment can inspire the students’experimental goaheadism, cultivate their ability to analyze and solve problems,and promote their innovative consciousness and practice skills.

On the development of Bio-analytic chemistry curricula,to enhance the build- ing of teaching staff,improve the teaching content according to the developmental trend of model chemistry,adopt multiform methods to explore new teaching pattern,improve the teaching quality based on the manage,the course on Bio-analytic chemistry has became more systematized and standardized.

Sample preparation and separation is a very crucial and complicated process in proteomics research.Based on the actual condition of university and students,this article explored the way to improve the teaching quality of sample preparation and separation in proteomics course for medical post-graduates aiming at cultivating and enhancing the students' scientific thought,making them have a better understanding of the rules,technologies,strategies in sample preparation and separation procedure.

Teachers introduced the means of the scientific thinking and scientific research prac-tice in the curriculum of proteomics in order to train the postgraduates to joint the theory and the practical research work in the curriculum course. For example, to cultivate students to truly understand the 2-DE protein separation technique, teachers used the various proteomic profile obtained from our research to points out its problems and limitations based on the classical 2-DE, then compared the improved 2-DE protein separation chromatography with the classical 2-DE graphic and analyzed what is the problem and how to solve them in the practical work. To improve the ability of scientific thinking for postgraduates , teachers took the tumor as the teaching cases and asked the postgraduates to search the references of can-cer associated with their professional , to put forward the scientific problems based on carefully reading these references, to design their research project and to seek the answer to their issue. These new teaching methods were found to be beneficial in training scientific talents of medical postgraduates.

Objective: To explore the inhibition effects of ectogenic wild type p53 cDNA(Ad wtp53) on colorectal carcinoma cell lines with different p53 gene status and search for the role of wild type p53 tumor suppressor gene in occurrenc and progress of malignant tumor. Methods: MTT process was taken to choose optimal transfection titre. Three kinds of cell lines(p53 gene deletion, mutation and nomal) were transferred by Ad wtp53 in optimal titre. The inhibition effects of these cell lines were observed and compared. Results: The best titre is 1000 MOI and p53 gene deletion cell line (THC 8908) shew the highest sensitivity. G 1 S transition period blocking effects occurred in all cell lines and G 2 M phase regulation effects were not coincidence in three colorectal cell lines. Conclusions: Recombinant adenovirus mediated wild type p53 gene observably inhibited colorectal carcinoma cell lines growth and proliferation, blocked cell cycle in G 0 /G 1 phase and displayed obvious different actions on G 2 M phase among cell lines with different p53 status.

ABSTRACT:Objective To construct V-set and immunoglobulin domain containing 4 (Vsig4)nanobodies (Nbs) as specific macrophage probes so as to use them as molecular probes of macrophagocytes.Methods A nanobody phage library was generated by using peripheral blood lymphocytes isolated from an alpaca immunized with recombinant Vsig4 protein.After three rounds of selection against recombinant Vsig4.The Nbs were subjected to sequencing and genome alignment to obtain VHH sequence.Nbs were isolated and tested for Vsig4 specificity in an ELISA using recombinant Vsig4.The affinity capacity of Nbs was verified by the cell line stably expressing Vsig4. Results A nanobody phage library with an estimated 7.27 × 107 clones with 70% insertion was successfully constructed.Totally 1 3 6 Vsig4-positive clones were sequenced and aligned according to different CDR3 sequences. In summary,1 5 Vsig4 nanobodies were obtained and grouped into 3 different CDR3 epitopes.The affinity of representing nanobody and Vsig4 was analyzed via ELISA;Nb1 1 9 showed the highest affinity against both recombinant and native Vsig4.Conclusion We successfully constructed and screened Vsig4 specific nanobody number 1 1 9 with high affinity and specificity.It can help with macrophage detection and in vivo monitoring.