Positive selection of Caenorhabditis elegans mutants with increased stress resistance and longevity.

Positive selection of Caenorhabditis elegans mutants with increased stress resistance and longevity.
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积极选择具有增强抗逆性和寿命的秀丽隐杆线虫突变体。

DOI:
10.1093/genetics/163.1.171
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发表时间:
2003
期刊:
影响因子:
3.3
通讯作者:
Riddle,DonaldL
Riddle,DonaldL
中科院分区:
生物学2区
文献类型:
--
作者:
Muñoz,ManuelJ;Riddle,DonaldL

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我们通过将第一个幼虫阶段 (L1) 置于 30° 的热应激下 7 天,开发了线虫长寿突变体的选择性条件。当温度升至 15° 后,幸存的幼虫发育成可育的成虫。在三个独立的实验中,对甲磺酸乙酯诱变动物的总共 100 万个 F2 后代和 50 万个 F3 后代进行了处理。在 81 个恢复并成熟为繁殖体的假定突变体中,63 个重新测试为耐热,49 个 (80%) 的平均寿命延长了 15% 以上。发现了影响寿命的所有已知类型的 dauer 形成 (Daf) 突变体,包括 6 个新的等位基因 ofdaf-2,以及一个独特的温度敏感、dauer 组成型等位基因 ofage-1。 dyf-2 和 unc-13 的等位基因被分离出来,并且与 unc-13 相互作用的基因 unc-18 的突变体也被发现长寿。十三个额外的突变定义了至少四个新基因。
We developed selective conditions for long-lived mutants of the nematodeCaenorhabditis elegansby subjecting the first larval stage (L1) to thermal stress at 30° for 7 days. The surviving larvae developed to fertile adults after the temperature was shifted to 15°. A total of one million F2progeny and a half million F3progeny of ethyl-methanesulfonate-mutagenized animals were treated in three separate experiments. Among the 81 putative mutants that recovered and matured to the reproductive adult, 63 retested as thermotolerant and 49 (80%) exhibited a >15% increase in mean life span. All the known classes of dauer formation (Daf) mutant that affect longevity were found, including six new alleles ofdaf-2, and a unique temperature-sensitive, dauer-constitutive allele ofage-1. Alleles ofdyf-2andunc-13were isolated, and mutants ofunc-18, a gene that interacts withunc-13, were also found to be long lived. Thirteen additional mutations define at least four new genes.
DOI: 10.1093/genetics/139.1.171
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期刊: GENOME RESEARCH
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