The Chromatin Configuration Promotes Constitutional Chromosomal Rearrangements in Post-Meiotic Sperm

The complex nuclear packaging of sperm DNA, known as sperm chromatin organization, is essential for protecting the paternal genome during fertilization. Recent studies suggest that changes in the post-meiotic chromatin structure, a specific arrangement that forms after meiosis is completed, may be associated with an increased risk of constitutional chromosomal rearrangements (CCRs) in offspring. This review examines the potential mechanisms by which abnormal post-meiotic organization may impair DNA stability in spermatogonial cells, thereby leading to CCR formation. We discuss the interplay between environmental exposure, epigenetic modifications, and chromatin remodeling during spermatogenesis. Furthermore, we highlight the need to investigate specific environmental factors that may disrupt post-meiotic chromatin organization and their impact on sperm health. Additionally, we emphasize that exploring the functional consequences of altered chromatin organization, including sperm motility, fertilization potential, and susceptibility to damage, is crucial. Unraveling the complex mechanisms governing post-meiotic chromatin organization and its impact on sperm DNA stability may pave the way for advances in diagnostic and treatment strategies for male infertility, ultimately promoting optimal reproductive health outcomes.