Barriers to male transmission of mitochondrial DNA in sperm development.

Barriers to male transmission of mitochondrial DNA in sperm development.
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DOI:
10.1016/j.devcel.2011.12.021
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发表时间:
2012-03-13
期刊:
影响因子:
11.8
通讯作者:
O'Farrell, Patrick H.
O'Farrell, Patrick H.
中科院分区:
生物学1区
文献类型:
--
作者:
DeLuca, Steven Z.;O'Farrell, Patrick H.

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在真核生物的遗传过程中,后代通常只从两个父母中的一个继承线粒体基因组:在动物中,雌性。虽然已经寻求从受精卵中消除父系来源的线粒体的机制,但在大多数动物中线粒体DNA的父系传递受到限制的发育阶段是未知的。在这里,我们表明,成熟的果蝇精子缺乏线粒体DNA,我们发现两个过程,消除线粒体DNA在精子发生。线粒体DNA类核的可视化揭示了它们在需要线粒体核酸酶(内切酶G)的过程中从发育中的精子细胞中突然消失。在核酸内切酶G突变体中,持续存在的类核通过细胞重塑过程从精子细胞中清除出来,该过程修剪和塑造精子细胞尾部。我们的研究结果表明,线粒体DNA在精子发生过程中被消除,从而消除了精子将线粒体基因组传递给下一代的能力。
Across the eukaryotic phylogeny, offspring usually inherit their mitochondrial genome from only one of two parents: in animals, the female. While mechanisms that eliminate paternally derived mitochondria from the zygote have been sought, the developmental stage at which paternal transmission of mitochondrial DNA is restricted is unknown in most animals. Here, we show that mature Drosophila sperm lack mitochondrial DNA, and we uncover two processes that eliminate mitochondrial DNA during spermatogenesis. Visualization of mitochondrial DNA nucleoids revealed their abrupt disappearance from developing spermatids in a process requiring the mitochondrial nuclease, Endonuclease G. In Endonuclease G mutants, persisting nucleoids are swept out of spermatids by a cellular remodeling process that trims and shapes spermatid tails. Our results show that mitochondrial DNA is eliminated during spermatogenesis, thereby removing the capacity of sperm to transmit the mitochondrial genome to the next generation.
DOI: 10.1016/s1534-5807(03)00120-5
发表时间: 2003-05-01
期刊: DEVELOPMENTAL CELL
影响因子: 11.8
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