Meiotic spindle apparatus and associated regulatory proteins

The meiotic spindle apparatus in oocytes is a specialized microtubule-based structure responsible for the accurate segregation of homologous chromosomes and sister chromatids during oogenesis (Sun & Schatten, 2006, PMID: 16414557). In human oocytes, this structure is uniquely acentrosomal, relying on microtubule-organizing centers (MTOCs) and a suite of regulatory proteins such as Aurora kinase A and Polo-like kinase 1 (PLK1) to manage spindle assembly (Holubcova et al., 2015, Science). The precise coordination of this apparatus is vital for maintaining genomic integrity; errors in spindle assembly or the spindle assembly checkpoint (SAC) are leading causes of maternal age-related aneuploidy and subsequent pregnancy loss (Bennabi et al., 2016, Frontiers in Cell and Developmental Biology). While not a traditional therapeutic target in the sense of a single receptor, its components are targeted by small molecules like taxanes and vinca alkaloids in research, and by kinase inhibitors in oncology, such as Alisertib targeting Aurora A (Marlow, 2010, Methods in Cell Biology). Therapeutic interest also extends to improving oocyte quality in assisted reproductive technologies by modulating these regulatory pathways to ensure proper spindle formation and chromosomal stability (Wang et al., 2020, Journal of Genetics and Genomics).

Other names

Oocyte meiotic spindleMeiotic apparatusAcentrosomal spindleMeiotic spindle assembly checkpoint

Modulation of microtubule polymerization dynamics and inhibition of regulatory kinases (e.g., Aurora A, PLK1) to control spindle assembly and chromosome attachment.