Antitumour effect of cyclin-dependent kinase inhibitors (p16(INK4A), p18(INK4C), p19(INK4D), p21(WAF1/CIP1) and p27(KIP1)) on malignant glioma cells.

Antitumour effect of cyclin-dependent kinase inhibitors (p16(INK4A), p18(INK4C), p19(INK4D), p21(WAF1/CIP1) and p27(KIP1)) on malignant glioma cells.
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DOI:
10.1038/sj.bjc.6600862
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发表时间:
2003-04-22
影响因子:
8.8
通讯作者:
--
中科院分区:
医学1区
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细胞周期蛋白依赖性激酶抑制物(CDKIs)具有诱导肿瘤细胞生长停滞或凋亡的能力,被认为是一种新型的抗癌药物。然而,目前还没有完全确定哪种CDKI是治疗恶性胶质瘤的最佳候选药物,以及正常脑组织是否受到CDKI表达的影响。利用表达CDKI(p16INK4A、p18INK4C、p19INK4D、p21WAF1/CIP1和p27KIP1)的重组腺病毒载体,比较CDKI对恶性胶质瘤细胞株(A172、GB-1、T98G、U87-MG、U251-MG和U373-MG)的抗肿瘤作用。P27KIP1对所有受试肿瘤细胞的生长抑制能力均高于其他CDKI。有趣的是,p27KIP1过表达可诱导肿瘤细胞自噬死亡,但不能诱导细胞凋亡。另一方面,p27KIP1的过表达不能抑制培养的星形胶质细胞(RNB)的活性,也不能诱导自噬。总之,我们的研究结果表明,p27KIP1基因转移可能是治疗恶性胶质瘤的一种有前途的方法。
Cyclin-dependent kinase inhibitors (CDKIs) are considered as novel anticancer agents because of their ability to induce growth arrest or apoptosis in tumour cells. It has not yet been fully determined, however, which CDKI is the best candidate for the treatment of malignant gliomas and whether normal brain tissues are affected by CDKI expression. Using recombinant adenoviral vectors that express CDKIs (p16INK4A, p18INK4C, p19INK4D, p21WAF1/CIP1 and p27KIP1), we compared the antitumour effect of CDKIs on malignant glioma cell lines (A172, GB-1, T98G, U87-MG, U251-MG and U373-MG). p27KIP1 showed higher ability to suppress the growth of all tumour cells tested than other CDKIs. Interestingly, overexpression of p27KIP1 induced autophagic cell death, but not apoptosis in tumour cells. On the other hand, p27KIP1 overexpression did not inhibit the viability of cultured astrocytes (RNB) nor induced autophagy. Overall, our findings suggest that gene transfer of p27KIP1 may be a promising approach for the therapy of malignant gliomas.
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