Mcm8, short for Minichromosome Maintenance 8 Homologous Recombination Repair Factor, is a key gene involved in multiple DNA-related processes. It is crucial for meiotic homologous recombination repair, safeguards genome stability during mitosis by coordinating the replication stress response, and is also implicated in DNA replication initiation [3]. Mcm8-related pathways are vital for maintaining genome integrity and play a role in processes like mitophagy and R-loop resolution [1,2]. Genetic models, such as mouse models, are valuable for studying its functions.

Disabling Mcm8 in mice leads to proliferation defects of primordial germ cells (PGCs), ultimately impairing fertility [1]. This shows its importance in PGC development and reproductive reserve establishment. Also, MCM8-deficient mice develop more severe coronary artery vasculopathy in a Kawasaki disease model, suggesting its role in protecting vascular health [2].

In conclusion, Mcm8 is essential for maintaining genome integrity, playing a significant role in processes like PGC development and vascular health. Mouse knockout models have been instrumental in revealing its functions in reproductive aging and Kawasaki disease-related vascular pathologies, enhancing our understanding of these biological processes and associated diseases.