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首页> 外文期刊>Cell biology international. >INDUCIBLE EXPRESSION OF MAD ACCELERATES GROWTH ARREST OF SERUM DEPRIVED HUMAN GLIOBLASTOMA CELLS
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INDUCIBLE EXPRESSION OF MAD ACCELERATES GROWTH ARREST OF SERUM DEPRIVED HUMAN GLIOBLASTOMA CELLS

机译:MAD的可诱导表达加速了血清来源的人类胶质母细胞瘤细胞的生长阻滞

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摘要

Mad is a basic-helix-loop-helix leucine zipper protein that heterodimerizes with Max. Mad:Max heterodimers recognize the same DNA binding sites as Myc:Max heterodimers. However, Myc and Mad are thought to influence transcription and cell proliferation in opposite ways through interaction with Max. While Myc activates transcription and cell proliferation Mad represses these activities (Ayer et. al., Cell 72, 211-222, 1993). We have constructed an expression vector containing the mad cDNA cloned downstream of an inducible viral promoter. Cell lines carrying the construct were derived by transfection into human glioblastoma cells and the effect of Mad induction on their growth rate was studied. When the cells were cultured in low serum concentrations (0.1%) Mad induction resulted in accelerated growth arrest. These findings are consistent with the proposed growth repression function of the Mad protein.
机译:Mad是与Max异源二聚体的基本螺旋-环-螺旋亮氨酸拉链蛋白。 Mad:Max异二聚体识别与Myc:Max异二聚体相同的DNA结合位点。然而,据认为Myc和Mad通过与Max相互作用以相反的方式影响转录和细胞增殖。 Myc激活转录和细胞增殖时,Mad抑制这些活性(Ayer等,Cell 72,211-222,1993)。我们已经构建了一种表达载体,其包含克隆在诱导型病毒启动子下游的mad cDNA。通过转染到人成胶质细胞瘤细胞中来获得携带该构建体的细胞系,并研究了Mad诱导对其生长速率的影响。当在低血清浓度(0.1%)中培养细胞时,Mad诱导导致加速的生长停滞。这些发现与Mad蛋白的拟议的生长抑制功能一致。

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