To explore the existence and distribution of nucleophosmin in the nuclear matrix and its co-localization with the other related gene products following HMBA treatment in the human hepatocarcinoma SMMC-7721 cells,the n...
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To explore the existence and distribution of nucleophosmin in the nuclear matrix and its co-localization with the other related gene products following HMBA treatment in the human hepatocarcinoma SMMC-7721 cells,the nuclear matrix of SMMC-7721 cells was extracted pre/post HMBA induced differentiation.2D PAGE proteomics analyses showed that nucleophosmin existed in the fractions of nuclear matrix proteins and was down-regulated after HMBA treatment with further confirmation by Western blot *** immunofluorescence observation revealed that nucleophosmin located in the nuclear matrix,HMBA treatment altered its expression level and distribution *** co-localization of nucleophosmin with cancer-related genes and the products of oncogenes or tumor repression genes,including c-fos,c-myc,p53 and Rb,using laser scanning confocal microscopy,were evaluated,and substantial differences were observed following HMBA *** results implies that nucleophosmin,as a nuclear matrix protein,the level of its expression and the colocalization with cancer-related gene products may play an important role during the differentiation of SMMC-7721 cell.
为了研究铜绿微囊藻 Microcystis aeruginosa PCC7820中是否存在内源昼夜节律,检测了其细胞中的三磷酸腺苷(ATP)含量和细胞分裂的日变化规律。通过生物发光法检测的细胞内 ATP 含量变化结果表明,在12h光/12h暗(L/D)周期环境下该藻的 ATP...
详细信息
为了研究铜绿微囊藻 Microcystis aeruginosa PCC7820中是否存在内源昼夜节律,检测了其细胞中的三磷酸腺苷(ATP)含量和细胞分裂的日变化规律。通过生物发光法检测的细胞内 ATP 含量变化结果表明,在12h光/12h暗(L/D)周期环境下该藻的 ATP 含量呈现明显的近似24h 的昼夜周期性变化,且这种周期性变化在连续光照条件下能至少持续运行3个周期,周期长度具有温度补偿效应,而光照和温度的改变能重置昼夜节律的时相,这说明铜绿微囊藻 ATP 含量的昼夜节律变化受到内源生物钟的控制。通过对细胞数、细胞大小和细胞分裂素含量的检测发现,传代时间为38.4h 的铜绿微囊藻的细胞分裂也呈现受生物钟调控的昼夜节律性,这种昼夜节律变化可能是生物钟通过一种门控机制调控 *** PCC7820的细胞分裂时相而产生的。
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