Rapid adenoviral transduction of freshly resected tumour explants with therapeutically useful genes provides a rationale for genetic immunotherapy for colorectal cancer

Rapid adenoviral transduction of freshly resected tumour explants with therapeutically useful genes provides a rationale for genetic immunotherapy for colorectal cancer
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具有治疗有用基因的新鲜切除的肿瘤外植体的快速腺病毒转导为结直肠癌的基因免疫治疗提供了理论依据

DOI:
10.1038/sj.gt.3300690
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发表时间:
1998
期刊:
影响因子:
5.1
通讯作者:
R. Vile
R. Vile
中科院分区:
医学3区
文献类型:
--
作者:
RM Diaz;S. Todryk;H. Chong;I. Hart;K. Sikora;S. Dorudi;R. Vile

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为了开发结直肠癌的分子免疫治疗方案,我们比较了三种不同类型的治疗基因在小鼠结直肠细胞模型中诱导抗肿瘤反应的功效。因此,将两种细胞因子(IL-2和GM-CSF)的作用与共刺激基因(B7.1)和自杀基因(HSVtk)的作用进行比较。在预防性疫苗接种模型中,针对原发性肿瘤生长的功效的等级顺序为HSVtk[GCV],B7.1 > puro,IL-2 >GM-CSF,neo,而诱导抗肿瘤免疫的功效的顺序为GM-CSF,IL-2,>B7.1,HSVtk[GCV]> puro,neo。为了以临床相关和现实的方式利用这些数据,我们还证明了结直肠肿瘤可以在短期培养中可重复地扩增和建立。最后,已经开发了一种快速转导方案,通过该方案,使用腺病毒载体,这些新鲜肿瘤外植体中多达90%的细胞可以被工程化以在手术后1-2周内表达高水平的临床相关基因(GM-CSF或IL-2)。在疫苗接种的重要时间范围内,腺病毒介导的基因递送比使用MFG-β-Gal逆转录病毒载体的逆转录病毒转导可重复且显著更有效。因此,动物模型数据与离体修饰方案的组合表明,适当阶段的结直肠患者的疫苗接种将是可能的和有效的。
To develop protocols for the molecular immunotherapy of colorectal cancer, we compared the efficacy of three separate classes of therapeutic genes to induce antitumour responses in a murine colorectal cell model. Thus, the effects of two cytokines (IL-2 and GM-CSF) were compared with those of a costimulatory gene (B7.1) and a suicide gene (HSVtk). The rank order of efficacy against primary tumour growth was HSVtk[GCV], B7.1 > puro, IL-2 >GM-CSF, neo whereas the order of efficacy in inducing antitumour immunity was GM-CSF, IL-2, >B7.1, HSVtk[GCV]> puro, neo in a prophylactic vaccination model. To exploit these data in a clinically relevant and realistic way, we also demonstrated that colorectal tumours can reproducibly be explanted and established in short-term culture. Finally, a rapid transduction protocol has been developed by which, using adenoviral vectors, as many as 90% of the cells in these fresh tumour explants can be engineered to express high levels of the clinically relevant genes (GM-CSF or IL-2) within 1–2 weeks of surgery. Adenovirus-mediated gene delivery was reproducibly and significantly more efficient than retroviral transduction using the MFG-β-Gal retroviral vector over the time-frame of importance for vaccination. Hence, combination of the animal model data with the ex vivo modification protocol suggests that vaccination of colorectal patients of the appropriate stage will be possible and effective.
B7-1 转基因小鼠中揭示了 B7 的负调节功能。
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DOI: --
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影响因子: --
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期刊: Cancer research
影响因子: 11.2
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