Expression cloning of multiple human cDNAs that complement the phenotypic defects of ataxia-telangiectasia group D fibroblasts.

Expression cloning of multiple human cDNAs that complement the phenotypic defects of ataxia-telangiectasia group D fibroblasts.
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多个人类 cDNA 的表达克隆,可补充共济失调毛细血管扩张 D 组成纤维细胞的表型缺陷。

DOI:
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发表时间:
1993
影响因子:
9.8
通讯作者:
L. B. Herzing
L. B. Herzing
中科院分区:
生物学1区
文献类型:
--
作者:
M. Meyn;J. Lu;L. B. Herzing

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共济失调毛细血管扩张症 (A-T) 是一种病因不明的遗传性人类疾病,与神经退行性变、免疫功能障碍、癌症风险和遗传不稳定有关。 A-T细胞对电离辐射和拟放射药物敏感,为通过表型互补克隆A-T基因提供了可能性。我们利用这种敏感性分离出第一个据报道可补充培养物中 A-T 细胞的人类 cDNA。互补组D A-T成纤维细胞用基于附加型载体的人cDNA文库转染,大约610,000个所得转化体用放射模拟药物链黑素抗性处理,并从29个幸存的链黑素抗性克隆中回收了9个不相关的cDNA。绘制了 5 个 cDNA,但没有一个位于 11q23,即 A-T 互补组 A 和 C 基因座的位点。四个绘制的 cDNA 在二次转染时赋予 A-T D 成纤维细胞诱变剂抗性。一个 cDNA 被鉴定为 dek 的片段,dek 是一种与急性髓系白血病有关的基因。 dek cDNA 片段和 pCAT4.5(映射到 17p11 的 4.5 kb cDNA)独立地补充了 A-T D 成纤维细胞的三种不同表型异常(诱变剂敏感性、超重组和抗辐射 DNA 合成)。 pCAT4.5 cDNA 不补充 A-T C 组成纤维细胞系的诱变剂敏感性,表明它代表 D A-T 组的候选疾病基因。我们的结果表明,仅表型互补不足以证明候选 cDNA 是 A-T 疾病基因。互补的 cDNA 可能代表以前未表征的基因,它们在调节细胞对 DNA 损伤的反应中与 A-T 基因产物具有相同的途径。
Ataxia-telangiectasia (A-T) is an inherited human disease of unknown etiology associated with neurologic degeneration, immune dysfunction, cancer risk, and genetic instability. A-T cells are sensitive to ionizing radiation and radiomimetic drugs, offering the possibility of cloning A-T genes by phenotypic complementation. We have used this sensitivity to isolate the first human cDNAs reported to complement A-T cells in culture. Complementation group D A-T fibroblasts were transfected with an episomal vector-based human cDNA library, approximately 610,000 resultant transformants were treated with the radiomimetic drug streptonigrin-resistant, and nine unrelated cDNAs were recovered from 29 surviving streptonigrin-resistant clones. Five cDNAs were mapped, but none localized to 11q23, the site of A-T complementation group A and C loci. Four of the mapped cDNAs conferred mutagen resistance to A-T D fibroblasts on secondary transfection. One cDNA was identified as a fragment of dek, a gene involved in acute myeloid leukemia. The dek cDNA fragment and pCAT4.5, a 4.5-kb cDNA that mapped to 17p11, independently complemented three different phenotypic abnormalities of A-T D fibroblasts (mutagen sensitivity, hyper-recombination, and radio-resistant DNA synthesis). The pCAT4.5 cDNA did not complement the mutagen sensitivity of an A-T group C fibroblast line, suggesting that it represents a candidate disease gene for group D A-T. Our results indicate that phenotypic complementation alone is insufficient evidence to prove that a candidate cDNA is an A-T disease gene. The complementing cDNAs may represent previously uncharacterized genes that function in the same pathway as does the A-T gene product(s) in the regulation of cellular responses to DNA damage.
通过微细胞介导的染色体转移和将 AT-D 基因座映射到 11q22-23 区域,对共济失调毛细血管扩张 D 组 (AT-D) 细胞进行功能互补。
DOI: 10.1073/pnas.88.13.5907
发表时间: 1991
影响因子: 11.1
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通讯作者: Friedberg,EC
DOI: --
发表时间: 1992-07
影响因子: 9.8
作者:
Leon N. Kapp;Robert B. Painter;Yu Lc;N. vanLoon;Richard Cw rd;Michael R. James;David Cox;J. Murnane
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DOI: 10.1126/science.2294592
发表时间: 1990-01-05
期刊: SCIENCE
影响因子: 56.9
作者:
LICHTER, P;TANG, CJC;WARD, DC
通讯作者: WARD, DC
转染 DNA 的生物活性亚群受损程度如何?
DOI: 10.1128/mcb.4.3.387-398.1984
发表时间: 1984
影响因子: 5.3
作者:
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DOI: 10.1101/sqb.1991.056.01.049
发表时间: 1991
期刊: Cold Spring Harbor symposia on quantitative biology
影响因子: --
作者:
Schimke,RT;Kung,AL;Rush,DF;Sherwood,SW
通讯作者: Sherwood,SW