Scientists at Michigan State University uncovered how developing sperm cells organize a molecular system essential for male fertility, revealing a nontraditional role for mitochondria — the structures best known as the cell’s energy producers. This work could ultimately help scientists better understand some causes of male infertility and the basic biology behind healthy sperm development.
Published in the journal Proceedings of the National Academy of Sciences, the study, which used mouse models, shows that mitochondria also act like cellular assembly platforms, gathering and organizing the molecular machinery needed to produce molecules called pachytene piRNAs, which are critical for sperm development.
Although pachytene piRNAs are known to be essential for male fertility, scientists have long struggled to understand how the system is physically organized inside cells.