Objective To investigate CT diagnosis and differentiating diagnosis of the retinoblastoma . Methods CT findings of 25 cases with pathologically proved retinoblastoma were analyzed.Results CT finding included:high density of vitreous body entirely or partly in all case. Calcification in 23, augment in 8, optic never demaged in 6, ectopia retinoblastoma in 7.Conclusion Retinoblastoma of eyeball can be diagnosis qualitativly by CT.

AIM: To study the effect and mechanism of BCG on human nature killer cells. METHODS: PBMC or purified NK cells were isolated from normal human peripheral blood with negative anti-Mycobacterium tuberculosis antibody and cultured with BCG, IL-12, BCG plus IL-12 and BCG plus anti-IL-12Rβ1 mAb (2B10), respectively. The levels of IFN-γ and IL-12p40 in the culture supernatants were measured by ELISA. The frequency of IFN-γ and granzyme B producing cells were analyzed by ELISpot. The cytolytic activity was detected by MTT reduction assay. The surface expression of IL-12Rβ1 on NK cells was detected by flow cytometry. RESULTS: BCG significantly induced IFN-γ production by PBMC in a dose-dependent manner. When PBMC was stimulated with BCG, the frequency of granzyme B producing cells was higher than that in unstimulated PBMC (P<0.05). BCG enhanced the cytotoxic activity of PBMC. BCG alone didn' t induce IFN-γ production by purified NK cells, but it can augment IL-12-induced IFN-γ production by purified NK cells. The cytotoxic activities of BCG-stimulated and unstimulated purified NK cells were not significantly different (P>0.05). BCG induced IL-12 production by PBMC in a dose-dependent manner and enhanced IL-12Rβ1 expression on different subsets of NK cells. Blocking the effect of IL-12 by anti-IL-12Rβ1 mAb (2B10) inhibited BCG-induced IFN-γ production and granzyme B releasing by PBMC. CONCLUSION: BCG can indirectly promote biologic activity of NK cells and the production of endogenous IL-12 combined with up-regulation IL-12Rβ1 expression on the surface of NK cells is a part of the mechanisms of IL-12 on human NK cells.

Objective To investigate the possibility of hair follicle reformation induced by hair follicle bulb cells implanted into collagen/chitosan porous scaffolds in vivo, and to observe the angiogenesis in implanted scaffolds.Methods Hair follicle bulb cells obtained by enzyme digestion from the hack skin of C57BL/6J mice were implanted into collagen/chitosan porous scaffolds followed by 2-week organotypie culture.Then,these collagen/chitosan porous scaffolds were transplanted subcutaneously into the dorsal skin of nude mice.Those nude mice transplanted with empty collagen/chitosan porous scaffolds served as the controls.The growth of hair was observed with naked eyes.Six weeks after the transplantation,skin samples were obtained from the recipient site and subjected to histological examination.Results Five weeks after the transplantation,hair growth was observed in the dorsal skin of nude mice.Six weeks later,histological examination revealed fully differentiated hair follicles and vessel-like structures in the center of collagen/chitosan porous scaffolds.However,the transplantation with empty collagen/chitosan porous scaffolds failed to elicit the same response.No hair or follicles were observed in the control mice alpng with small number of vessel-1ike structures.Con-clusions Hair follicle bulb ceils implanted into collagen/chitosan porous scaffolds in vivo could induce hair follicle reformation and promote the formation of vessel-like structure in the scafffold center.

Objective To establish a druggability evaluation method for new targets of anti-tumor drugs by analyzing the mutation genes of common tumors in the digestive system. Methods We collected the mutant gene data of the five common tumors of the digestive system (esophageal cancer, gastric cancer, colorectal cancer, liver cancer and pancreatic cancer) in the Integrative Onco Genomics database, and screened out the genes with higher mutation rates in each tumor. We evaluated the druggability of these genes or their encoded proteins, and discovered the potential targets for the new anti-tumor drugs. Results A total of five tumors, 35 cohorts and 5445 tumor samples were collected in this study. The top 10 mutation genes were selected for further analysis. The canSAR database was used to analyze the druggability of unpublished mutant genes or their encoded proteins, and a total of 17 potential therapeutic drug targets were screened out. Conclusion A method for evaluating druggability of targets based on mutant genes or their encoded protein is established in this study. The application of this method can provide a reference for discovering new anti-tumor therapeutic target, saving the cost and time of target screening in new drug development.