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(三)靶细胞的选择
---- 分为生殖细胞和体细胞两大类,现阶段只限于应 用体细胞
靶细胞选择的原则: • 1.易操作; • 2.易培养; • 3.易接受外源基因; • 4.在体内能持久高效表达
目前常用的靶细胞包括:成纤维细胞、淋巴细胞、上皮细胞、造血 细胞、肝细胞、肌细胞等
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(四)基因转移方法
• 耐药基因治疗:在肿瘤治疗中,为提高机体耐受 肿瘤化疗药物的能力,把产生抗药物毒性的基因 导入人体细胞。如将多药耐药基因MDR-1导入骨 髓造血干细胞,减少骨髓受抑制的程度,以加大 化疗剂量,提高化疗效果。
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三 基因治疗的基本步骤
治疗性基因的获得
基因载体的选择 靶细胞的选择
病毒载体 非病毒载体
体细胞 生殖细胞
LOGO
2019/9/4
基因治疗简介
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一 基因治疗的概念
经典概念(狭义概念):将具有正常功能的基因 置换或增补患者体内缺陷的基因,从而达到治 疗疾病的目的。 广义概念:将某些遗传物质转移至患者体内, 使其在体内表达,最终达到治疗某种疾病的方 法,均称之为基因治疗。
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基因治疗的类型
• Types of gene therapy
• Gene therapy may be classified into the two following types: • Germ line gene therapy(生殖细胞基因治疗) • In the case of germ line gene therapy, germ cells, i.e., sperm or eggs, are modified by
the introduction of functional genes, which are integrated into their genomes. Therefore, the change due to therapy would be heritable and would be passed on to later generations. This new approach, theoretically, should be highly effective in counteracting genetic disorders and hereditary diseases. However, many jurisdictions(司法部门) prohibit this for application in human beings, at least for the present, for a variety of technical and ethical reasons.[citation needed] • Somatic gene therapy(体细胞基因治疗) • In the case of somatic gene therapy, the therapeutic(治疗的) genes are transferred into the somatic cells of a patient. Any modifications and effects will be restricted to the individual patient only, and will not be inherited by the patient's offspring or later generations.