Elimination of paternal mitochondria through the lysosomal degradation pathway in C. elegans.

Abstract:

:In mammals, the inheritance of mitochondrion and its DNA (mtDNA) is strictly maternal, despite the fact that a sperm can inject up to 100 functional mitochondria into the oocyte during fertilization. The mechanisms responsible for the elimination of the paternal mitochondria remain largely unknown. We report here that this paternal mitochondrial elimination process is conserved in Caenorhabditis elegans, and that the lysosomal pathway actively participates in this process. Molecular and cell biological analyses indicate that in wild-type animals paternal mitochondria and mtDNA are destroyed within two hours after fertilization. In animals with compromised lysosomes, paternal mitochondria persist until late embryonic stages. Therefore, the lysosomal pathway plays an important role in degrading paternal mitochondria introduced into the oocyte during fertilization. Our study indicates that C. elegans is an excellent animal model for understanding and dissecting this conserved biological process critical for animal development and reproduction.

journal_name

Cell Res

journal_title

Cell research

authors

Zhou Q,Li H,Xue D

doi

10.1038/cr.2011.182

subject

Has Abstract

pub_date

2011-12-01 00:00:00

pages

1662-9

issue

12

eissn

1001-0602

issn

1748-7838

pii

cr2011182

journal_volume

21

pub_type

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