A role for retrotransposon LINE-1 in fetal oocyte attrition in mice.
A role for retrotransposon LINE-1 in fetal oocyte attrition in mice.
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DOI:
10.1016/j.devcel.2014.04.027
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发表时间:
2014-06-09
影响因子:
11.8
通讯作者:
Bortvin, Alex
中科院分区:
文献类型:
--
作者:
Malki, Safia;van der Heijden, Godfried W.;O'Donnell, Kathryn A.;Martin, Sandra L.;Bortvin, Alex
Fetal oocyte attrition (FOA) is a conserved but poorly understood process of elimination of over two-thirds of meiotic prophase I (MPI) oocytes before birth. We now implicate retrotransposons LINE-1 (L1), activated during epigenetic reprogramming of the embryonic germline, in FOA in mice. We show that wild-type fetal oocytes possess differential nuclear levels of L1ORF1p, a L1-encoded protein essential for L1 ribonucleoprotein particle (L1RNP) formation and L1 retrotransposition. We demonstrate that experimental elevation of L1 expression correlates with increased MPI defects, FOA, oocyte aneuploidy and embryonic lethality. Conversely, reverse transcriptase (RT) inhibitor AZT has a profound effect on the FOA dynamics and meiotic recombination, and implicates an RT-dependent trigger in oocyte elimination in early MPI. We propose that FOA serves to select oocytes with limited L1 activity and therefore best suited for the next generation.
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DOI:
10.1073/pnas.0831042100
发表时间:
2003-04-29
影响因子:
11.1
作者:
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通讯作者:
Kazazian, HH
影响因子:
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作者:
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影响因子:
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作者:
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通讯作者:
Moran JV
影响因子:
5.8
作者:
Belgnaoui SM;Gosden RG;Semmes OJ;Haoudi A
通讯作者:
Haoudi A