Retrovirus-mediated transfer of the human O6-methylguanine-DNA methyltransferase gene into a murine hematopoietic stem cell line and resistance to the toxic effects of certain alkylating agents.

Retrovirus-mediated transfer of the human O6-methylguanine-DNA methyltransferase gene into a murine hematopoietic stem cell line and resistance to the toxic effects of certain alkylating agents.
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逆转录病毒介导的人 O6-甲基鸟嘌呤-DNA 甲基转移酶基因转移至小鼠造血干细胞系中,并抵抗某些烷化剂的毒性作用。

DOI:
10.1016/0006-2952(96)00077-9
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发表时间:
1996
影响因子:
5.8
通讯作者:
E. Bresnick
E. Bresnick
中科院分区:
医学2区
文献类型:
--
作者:
G. Wang;Clifford Weiss;Peihua Sheng;E. Bresnick

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O6-甲基鸟嘌呤-DNA 甲基转移酶 (MGMT) 是一种重要的 DNA 修复蛋白,在卡莫司汀 (BCNU) 和达卡巴嗪 (DTIC) 等烷化剂的癌症化疗中发挥着关键作用。由于骨髓细胞中 MGMT 修复活性较低,因此剂量限制性血液学毒性会降低 BCNU 和 DTIC 的治疗效果。在本研究中,我们构建了含有人类 mgmt 基因的莫洛尼鼠白血病病毒逆转录病毒载体。已产生高滴度逆转录病毒生产细胞系。逆转录病毒介导的人类 mgmt 基因转移至小鼠多能造血干细胞 FDCP-1 中,导致高水平 MGMT 活性的表达。与用亲本载体转导的对照细胞相比,表达MGMT的克隆对甲基化剂(例如N-甲基-N'-硝基-N-亚硝基胍、N-亚硝基-N-甲基脲和替莫唑胺)以及氯乙基化剂1-(2-氯乙基)-1-亚硝基脲和BCNU的细胞毒性具有更强的抵抗力。 MGMT 提供的保护可以被 MGMT 灭活剂 O6-苄基鸟嘌呤消除。因此,这些烷化剂在小鼠造血干细胞中产生的主要致死损伤和这些细胞中的 MGMT 缺陷可以通过逆转录病毒介导的基因转导来补充。
O6-Methylguanine-DNA methyltransferase (MGMT) is an important DNA repair protein that plays a key role in cancer chemotherapy by alkylating agents such as carmustine (BCNU) and Dacarbazine (DTIC). Therapy by BCNU and DTIC is reduced by dose-limiting hematological toxicity as a result of low MGMT repair activity in bone marrow cells. In this study, we have constructed a Moloney murine leukemia virus retroviral vector containing the human mgmt gene. High-titer retrovirus producer cell lines have been generated. Retroviral-mediated transfer of the human mgmt gene into murine multi-potent hematopoietic stem cells, FDCP-1, resulted in the expression of a high level of MGMT activity. In comparison with the control cells that were transduced with the parent vector, the MGMT-expressing clones were considerably more resistant to the cytotoxicity of the methylating agents, such as N-methyl-N′-nitro-N-nitrosoguanidine, N-nitroso-N-methylurea, and temozolomide, as well as the chloroethylating agents 1-(2-chloroethyl)-1-nitrosourea and BCNU. The protection provided by MGMT could be eliminated by the MGMT inactivator O6-benzylguanine. Thus, the principal lethal lesions produced by these alkylating agents in the murine hematopoietic stem cells and the MGMT deficiency in these cells can be complemented by retroviral-mediated gene transduction.
表达 ada 基因的转基因小鼠肝脏中 O6-甲基鸟嘌呤 DNA 加合物的增强修复。
DOI: --
发表时间: 1991
期刊: Cancer research
影响因子: 11.2
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DOI: --
发表时间: 1992
期刊: Cancer research
影响因子: 11.2
作者:
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DOI: 10.1016/0027-5107(90)90156-x
发表时间: 1990-11-01
期刊: MUTATION RESEARCH
影响因子: --
作者:
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DOI: 10.1093/carcin/12.10.1857
发表时间: 1991-10
期刊: Carcinogenesis
影响因子: 4.7
作者:
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骨髓中逆转录病毒介导的 DNA 修复蛋白表达可保护造血细胞免受亚硝基脲诱导的体外和体内毒性。
DOI: --
发表时间: 1995
期刊: Cancer research.
影响因子: --
作者:
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