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Theriogenology

Relationships between mitochondrial DNA content, mitochondrial activity, and boar sperm motility.


PMID 27769573

Abstract

Energy produced by mitochondria via oxidative phosphorylation (OXPHOS) is essential for mammalian sperm motility. Mammalian mitochondrial DNA (mtDNA)-encoded proteins are subunits of the OXPHOS system. Paradoxically, there are less mitochondrial and mtDNA contents in motile sperm than less motile sperm. Here, mature boar sperm was used as a model to investigate the relationships between mtDNA content, mitochondrial activity, and sperm motility. Motile and less motile sperm were separated by centrifugation on a discontinuous percoll density gradient. The contents and expression of mtDNA as well as mitochondrial activity and biosynthesis were determined to reveal possible mechanisms. Motile sperm showed less mitochondrial (Pxa0

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