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PD 0332991是一种高度特异性的细胞周期依赖性激酶4(Cdk4)(IC50,0.011微摩尔/升)和Cdk6(IC50,0.016微摩尔/升)抑制剂,对36种额外蛋白激酶无活性。它是对视网膜母细胞瘤(Rb)阳性肿瘤细胞具有强效抗增殖作用的体外药物,可诱导特异性的G1期停滞,同时降低Rb蛋白的磷酸化Ser780/Ser795水平。口服给予携带Colo-205人结肠癌的小鼠PD 0332991可显著促进肿瘤退缩。治疗剂量的PD 0332991可导致肿瘤组织中磷酸化Rb和增殖标记物Ki-67的消失,并下调受E2F转录控制的基因。这些结果表明,单独抑制Cdk4/6足以引起某些肿瘤的退缩及肿瘤负荷的显著减少。
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David W. Fry
Patricia J. Harvey
Paul R. Keller
Molecular Cancer Therapeutics
Pfizer (United States)
SeaWorld Entertainment
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Fry等人(Mon,)研究了这个问题。
www.synapsesocial.com/papers/69d8d9b0d2f7327e70ae46bd — DOI: https://doi.org/10.1158/1535-7163.1427.3.11
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