The presence of a relatively mature CD4+CD8- (SP)T cell subset in mouse thymus has been demonstrated. Composing of 10% of total CD4SP thymocytes, this subset is defined by the absence of 3G11 and 6C10 expression with ...The presence of a relatively mature CD4+CD8- (SP)T cell subset in mouse thymus has been demonstrated. Composing of 10% of total CD4SP thymocytes, this subset is defined by the absence of 3G11 and 6C10 expression with a phenotype of CD69 +/- , HSAmed/lo and heterogeneous for Qa - 2 expression. The proliferation capability of TCRαβ+ 3G11-6C10- CD4+ CD8- thymocytes was high while using Con A stimulus. And Con A stimulation could result in secretion of IL-4, IL-10, IL-6 and a little amount of IFNγ. IL-2 was barely detectable. This is distinct from typical Th0 type cytokines. The cells of this subset were NK1.1 negative, but strongly expressed GATA-3 mRNA. The results suggest that the CD4+ subset of 3G11 - 6C10- NK1.1 - phenotype possesses immunocompetent cells with functions characteristic of Th2-like cytokines, which may indicate the cells at transitional status from ThO to Th2, with a propensity to Th2.展开更多
A murine CD4+ thymocyte subset with phenotype of TCRαβ + 3G11- 6C10- CD4 + CD8- CD69 + /- HSAmed/lo contains the cells in relatively functional matured status. The functional property of the cells in this subset is ...A murine CD4+ thymocyte subset with phenotype of TCRαβ + 3G11- 6C10- CD4 + CD8- CD69 + /- HSAmed/lo contains the cells in relatively functional matured status. The functional property of the cells in this subset is characterized by the unique pattern of cytokine production at transitional stage from ThO to Th2 type with the latter being the dominant type. After being co-cultured with murine thymic medullary epithelial cell line (MTEC1) cells, a murine展开更多
Aldehydes play an important role in atmospheric chemistry and plant direct and indirect defense against environmental stresses.In this study,the emissions of saturated C6-C10 aldehydes from Populus simonii × P.py...Aldehydes play an important role in atmospheric chemistry and plant direct and indirect defense against environmental stresses.In this study,the emissions of saturated C6-C10 aldehydes from Populus simonii × P.pyramidalis ＇Opera 8277＇ cuttings were examined by using a gas chromatography/mass spectrometry（GC/MS） technique at three levels of light intensity（400,800 and 1 200 μmol·m-2·s-1）.A positive correlation between the emissions of these aldehydes and light intensity was found.Moreover,nordi-hydroguaiaretic acid（NDGA）,a special inhibitor of lipoxygenase（LOX）,significantly inhibited the emissions of C6-C9 aldehydes at three levels of light intensity,but did not influence the emission of decanal（C10）.The emissions of C6-C10 aldehydes in NDGA treated poplar cuttings,exhibited the same positive correlation with light intensity.The results indicated that LOX pathway contributes to the emissions of C6-C9 aldehydes,whereas some pathways regulated by light intensity might be a universal mechanism for emissions of C6-C10 aldehydes.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 39730410).
文摘The presence of a relatively mature CD4+CD8- (SP)T cell subset in mouse thymus has been demonstrated. Composing of 10% of total CD4SP thymocytes, this subset is defined by the absence of 3G11 and 6C10 expression with a phenotype of CD69 +/- , HSAmed/lo and heterogeneous for Qa - 2 expression. The proliferation capability of TCRαβ+ 3G11-6C10- CD4+ CD8- thymocytes was high while using Con A stimulus. And Con A stimulation could result in secretion of IL-4, IL-10, IL-6 and a little amount of IFNγ. IL-2 was barely detectable. This is distinct from typical Th0 type cytokines. The cells of this subset were NK1.1 negative, but strongly expressed GATA-3 mRNA. The results suggest that the CD4+ subset of 3G11 - 6C10- NK1.1 - phenotype possesses immunocompetent cells with functions characteristic of Th2-like cytokines, which may indicate the cells at transitional status from ThO to Th2, with a propensity to Th2.
文摘A murine CD4+ thymocyte subset with phenotype of TCRαβ + 3G11- 6C10- CD4 + CD8- CD69 + /- HSAmed/lo contains the cells in relatively functional matured status. The functional property of the cells in this subset is characterized by the unique pattern of cytokine production at transitional stage from ThO to Th2 type with the latter being the dominant type. After being co-cultured with murine thymic medullary epithelial cell line (MTEC1) cells, a murine
基金supported by National Natural Science Foundation of China (30871727 31071817)+1 种基金the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality (PXM20090142076309)the Beijing Science and Technology Plan Program (Z080005032508017)
文摘Aldehydes play an important role in atmospheric chemistry and plant direct and indirect defense against environmental stresses.In this study,the emissions of saturated C6-C10 aldehydes from Populus simonii × P.pyramidalis ＇Opera 8277＇ cuttings were examined by using a gas chromatography/mass spectrometry（GC/MS） technique at three levels of light intensity（400,800 and 1 200 μmol·m-2·s-1）.A positive correlation between the emissions of these aldehydes and light intensity was found.Moreover,nordi-hydroguaiaretic acid（NDGA）,a special inhibitor of lipoxygenase（LOX）,significantly inhibited the emissions of C6-C9 aldehydes at three levels of light intensity,but did not influence the emission of decanal（C10）.The emissions of C6-C10 aldehydes in NDGA treated poplar cuttings,exhibited the same positive correlation with light intensity.The results indicated that LOX pathway contributes to the emissions of C6-C9 aldehydes,whereas some pathways regulated by light intensity might be a universal mechanism for emissions of C6-C10 aldehydes.
