Objective:To investigate changes in subsets of T cells in the spleen of mice by immunization with mix recombinant BCG-EmⅡ/3 and BCG-Em14-3-3 vaccine of Echinococcus multilocularis(Em)and against challenge with Em protoscoleces.Methods:BALB/C mice were subcutaneously and intranasally vaccinated with mix recombinant BCG vaccines respectively,then challenged with Em protoscolexes on 8w of vaccination and killed on 18w of infection to get spleen.Spleen cells were separated to measure subsets of CD4+ and CD8+T cells by FACsort,Blank vector,BCG and PBS served as control.Results:In the groups of immunization,CD4+subset increased significantly,as well as the ratio of CD4+/CD8+subset,but CD8+ subset had no change,CD4+ subset and ratio of CD4+/CD8+subset in the subcutaneous group were higher than these in the intranasal group.Conclusion:CD4+T cells subset may bear a part in protection induced in mice by mixed recombinant BCG-EmⅡ/3 and BCG-Em14-3-3 vaccine against challenge with Em protoscoleces.

[ Objective] To observe the effect of removing phlegm,softening and removing blood stasis on pulmonary morphology and hydoxyprolin of pulmonary fibrosis rats. [Methods]The experimental pulmonary fibrosis models were produced by injecting BLMA5.All animals were randomly divided into 5 groups which were control group, model group, Chinese herb high-dose group, Chinese herb low-dose group and prednisone group respectively, the drugs were given daily starting from the second day and the rats were killed on the 7th and 28th day. The shape of rats’ lung tissues was observed, the levels of hydroxyproline in lung tissues were measured. [Results] In model group, alveolitis increases(much inflammatory cell infiltration), pulmonary interstitial fibroblast increases. There is less pulmonary tissue inflammatory cell infiltration in drug-given groups than that in model group and so is fibroblast. Compared with the model group, the content of HYP of pulmonary tissues of the drug-given groups is remarkably decreased. [Conclusion] The Chinese herb of removing phlegm, softening and removing blood stasis can effectively inhibit the formation of pulmonary fibrosis caused by BLMA5.

It has been well-known that many medicinal plants used in traditional Chinese medicine contain hepatotoxic pyrrolizidine alkaloids (HPAs), and some even have been recorded in many editions of the Chinese Pharmacopoeia (ChP). In order to clarify the current status of these PAs-containing Chinese materia medica and proprietary Chinese formulae, the ChP 2010, the newest version, and the related safety issues were thoroughly investigated and analyzed on the current advances in research. Total nine crude drugs (not including the processed slices) were found to contain HPAs, which may be present in tens of Chinese proprietary drugs prepared with these crude drugs. Because of the lack of the alkaloid limitation in most monographs, their potential threats to human health may be underestimated. For this reason, attention should be drawn to the importance of the issue. The key point is to conduct the basic studies immediately on these PA-containing herbal plants or products, whose possible hazards need to be carefully assessed. Further efforts should also be made to elevate the criteria for quality control and ensure the drugs' safety in clinic for human health.

Objective To review recent studies on the research advance of the relationship between RET proto-oncogene and differentiated thyroid carcinoma. Methods The literatures in recent years on the structure of RET gene and coding product,cell signal transduction,relationship between RET proto-oncogene and differentiated thyroid carcinoma were reviewed.Results RET gene encoding tyrosine kinase receptor,involving in cell signal transduction,rearrangement of RET gene was frequently seen in papillary thyroid carcinoma.Conclusion Rearrangement of RET gene was closely correlated with the occurrence and progress of differentiated thyroid carcinoma,RET gene may be considered as a new therapeutic target for differentiated thyroid carcinoma.

Objective To investigate the effect of steroid receptor coactivator family in initiation, development, treatment and prognosis of breast cancer. Methods The literatures in recent years which have related to the effect of steroid receptor coactivators in breast cancer are reviewed. Results Steroid receptor coactivators are essential for several kinds of steroid hormones binding to steroid receptors, so they are important accessory factors that induce the initiation, development and recurrence of breast cancer, and predictive factors that estimate the prognosis of breast cancer. Conclusion Inhibition of the expression and signaling pathway of steroid receptor coactivators may be effective for breast cancer prevention and treatment.

Objective To investigate the distribution and the number of splenic lymphocytes in the patients with severe acute respiratory syndrome(SRAS).Methods Immunohistochemical method with four specific antibodies(CD3,CD4,CD8,CD20) was used to detect the distribution of lymphocyte special antigens in the spleens of six cases who died of SARS and six normal cases as the controls.The numbers of lymphocytes were analyzed with image analysis system.Results In the spleen of SARS patients,splenic corpuscle and periarterial lymphatic sheath (white pulp) were damaged severely. In the number of periarterial lymphatic sheath decreased 93.39% and in the number of splenic capsule decreased about 80% even disappeared at all. Red pulp hemorrhage necrosis was widely spread. In red pulp the number of CD3~(+)T cells decreased 71.76%,even disappeared at all,in the number of CD4~(+) and CD8~(+)T cells markedly decreased 86% and 84% respectively.The number of CD20~+ B cell decreased more than 80%. Conclusion T cells and B cells in spleens of SARS patients decreased widely spread and markedly in number,indicating that the immune system had been damaged severely,and the destroyment of the immunosystem may be the primary lesion of SARS.

Objective To analyse the number of dendritic cells and macrophages and the size of macrophages in the spleen of SARS patients so as to provide evident for the study of pathology and pathogenesis of SARS. Methods Immunohistochemical method with four specific antibodies(S-100,CD68,HLA-DR,CD83) were used to detect the dendritic cells and macrophages in the spleens of six dead patients of SARS and six accidental deaths as the controls,The number or the size of these positive cells was analysed with image analysis system. Results In the spleens of SARS patients,the number of S-100~+ dendritic cells in the white pulp was reduced by 80.4% on average,and even disappeard.The number of CD68~+ macrophages in the red pulp was reduced by 39.48% in SARS spleens,and the average size of individual macrophages was increased by 2.21 times.HLA-DR~+ antigen presenting cells(APC) reduced remarkably in the SARS spleen white pulp.CD83~+ mature dendritic cells did not exist in either SARS spleens or the control spleens.Conclusion The function of antigen presentation had been damaged severely,which supports that SARS should be categorized as a viral immune deficiency disease.SARS virus doesn't induce the maturation of DC.The increase in the size of macrophages indicated that they were in an activated state and may play a role in the pathogenesis of SARS.

Objective To study arsenic trioxide induces apoptosis of human cholangiocarcinoma cell line QBC939. Methods MTT was applied to detect the inhibitory effect of arsenic trioxide on cholangiocarcinoma cell line QBC939. Morphological changes were observed by light microscopy and fluorescence microscopy. Rhodamine123 dyeing and analysis of DNA content and cell cycle were examined by flow cytometry. Results Cell growth was significantly inhibited by different concentration(1-16?mol/L) of arsenic trioxide. The inhibition ratio was dependent on arsenic concentration and time. The typical morphological character of ~apoptosis was observed, apoptotic peak of hypodiploid was detected and fluorescence intensity of ~Rhodamine 123 decreased when the cells were cultured with 4?mol/L As_2O_3. Conclusions As_2O_3 can induce ~apoptosis of cell line QBC939. The mechanism may be related to the depolarization of mitochondrial ~membrane potential.

Objective To study the expressions of p27Kip1 (p27) protein and Ki 67 antigen in human clear cell carcinoma of kidney and to find out the relationship between the expression levels and the clinical pathological characteristics and prognosis in cases of clear cell carcinoma of kidney. Methods The expressions of p27 protein and Ki 67 antigen in the adjacent tissues of carcinoma in 20 cases and 42 cases of clear cell carcinoma of kidney were detected by immunohistochemistry. Results The positive rates of p27 protein and Ki 67 antigen in clear cell carcinoma of kidney were significantly higher than those of the both in the adjacent tissues of carcinoma( P