Objective To elucidate the antitumor activity of exopolysaccharide from Aphanothece halophytica(EPAH).Methods The in vivo inhibition of EPAH on growth of tumor was performed by inoculation of S_(180) sarcoma cells into ICR mice.While in vitro activity against tumor cells was assayed by the growth inhibition of cell lines of S_(180) sarcoma,Smcc7721,and HeLa.The effects of EPAH on immune function were evaluated by the influence on the thymus,spleen,and the number of lymphocytes in blood stream,the influence on proliferation of lymphocytes,the killing activity of NK cells,and the production of NO,IL-1?,and TNF-?. Results EPAH inhibited in vivo S_(180) sarcoma growth with the highest inhibi-(tory) rate of 66.79% and 47.93% in the test mice of pretreatment and simultaneous treatment,respectively.EPAH also displayed in vitro activity against the test cell lines with the highest inhibitory rate being more than 60% at a concentration of 100 ?g/mL.EPAH was found to affect the immune function in mice including increasing the weight of thymus,spleen,and the number of lymphocytes in the blood stream,accelerating the proliferation of lymphocytes,enhancing the killing activity of NK cells,and stimulating the production of NO,IL-1?,and TNF? by macrophages.Conclusion EPAH is an effective antitumor(agent.) It inhibites the tumor cells directly and hence the growth of tumor.Its antitumor activity is probably realized by increasing the weight of immune organs and the number of immunocytes as well as lymphocyte proliferation,enhancing the killing activity of NK cells,facilitating the production of NO and related(cytokines) in tumor-bearing mice.

Objective: To elucidate antiviral fractions from ethanol extract of Euphorbia kansui .Methods: Initial separation of ethanol extract from Euphorbia kansui was performed by column chromatography. The test mice were infected with flu virus mouse pneumonia adaptive strain (FM 1) and then treated with separated fractions intragastrally for determining lung index inhibition rate. The T lymphocyte proliferation enhancement was observed by the dosimetry of 3 H TdR infiltrated into DNA of the cell.Result: Initial separation of the extract afforded to 15 fractions. Fractions 8～15 with the elution volume from 29500 to 95000mL were highly effective to the therapy of the mice pneumonia. The enhancement to the lymphocyte proliferation of the 8 fractions under low concentration were 2～3 times higher than that of the control.Conclusion: Fractions 5 and 8～15 exhibited strong in vivo antiviral activity to the test virus, which might be realized by stimulating lymphocyte proliferation, enhancing the capacity of killing the cells infected by the virus.

Objective To investigate the expression of interleukin-35 (IL-35) in patients with sepsis and multiple organ dysfunction syndrome (MODS),and to explore its effect on disease prognosis.Methods A prospective study was conducted.Twenty-two patients with sepsis and MODS were selected as study group,and 20 healthy volunteers were selected as controls.Blood samples of the patients and the volunteers were taken within 1 hour of the patient's visit,and cytokines,such as IL-35,IL-4,IL-10,IL-17,INF-γ,and TGF-β,were simultaneously detected by enzyme-linked immunosorbent assay (ELISA).The expression level of CD4+CD25+FOXP3+ Treg cells was detected by flow cytometry,and the acute physiology and chronic health status scoring system Ⅱ (APACHE Ⅱ) was calculated.According to the survival outcome at 28 days after admission,the expression levels of IL-35 in the survival group (12 cases)and the death group (8 cases) were compared.The Spearman method was used to analyze the correlation between IL-35 level and the.above indicators in patients with sepsis and MODS.Results Compared with the control group,the IL-35 levels were significantly increased in the study group (P＜0.05),and the IL-35 levels began to increase gradually on the first day of the disease,and significantly higher on the 7th day (P＜0.01).The number of CD4+CD25+FOXP3+regulatory T cells increased in the study group,especially on the 4th day (P＜0.01),and on the first day of the disease,the IL-35 levels were positively correlated to the number of CD4+CD25+FOXP3+Treg cells (r=0.60,P＜0.05).Compared with the control group,the levels of IL-10,IL-4,IL-17,INF-γ and TGF-β in the study group increased gradually with the course of disease,and were significantly higher on the 7th day than those on the 1st day and the 4th day (P＜0.05).The IL-35 levels in the study group were positively correlated with INF-γ and TGF-β cytokines (P＜0.05),whereas there was no significant relationship between the levels of IL-10,IL-4,and IL-17 (P＞0.05).The IL-35 level in the death group was significantly lower than that in the survival group (P＜0.05).IL-35 levels in the survival and death groups were analyzed by ROC curve with a AUC of 0.78 (P=0.03).The ~ IL-35 level was negatively correlated with the APACHE-Ⅱ score in the study group (r=-0.78,P＜0.01).Conclusions The IL-35 levels in patients with sepsis and MODS is significantly higher than that in healthy controls,and negatively correlated with APACHE Ⅱ score.The level of IL-35 has an important implication for the prognosis for patients with sepsis.