The Aurora kinases (AURK) are key regulatory proteins essential for spindle building and chromosome alignment and segregation in mitosis and meiosis. AURKA and AURKB are expressed in all cell types but the third isoform, AURKC, is exclusively expressed in germ cells. Unique expression of all three Aurora kinase isoforms in germ cells raises questions about identifying their specific and redundant functions, oocyte and meiosis-specific roles and generally why germ cells require an additional isoform. Conditional knockout mice were used to address these questions and reveal additional information about regulation of oocyte meiosis. This chapter provides an update on recent findings uncovering more details on the role of Aurora kinases in oocyte meiosis. We dive into their individual functions during establishment of the meiotic spindle and coordinating chromosome alignment but also address newly discovered non-canonical roles in regulating mitochondria, translation, and cytokinesis. Understanding the functional implications of these kinases offers valuable insight into the fundamental processes that control meiosis and fertility.

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Aurora Kinases: A Summary of Mouse Genetic Models Used to Distinguish Their Roles in Oocyte Meiosis and Female Fertility

  • Mayra Romero,
  • Gyu Ik Jung,
  • Karen Schindler

摘要

The Aurora kinases (AURK) are key regulatory proteins essential for spindle building and chromosome alignment and segregation in mitosis and meiosis. AURKA and AURKB are expressed in all cell types but the third isoform, AURKC, is exclusively expressed in germ cells. Unique expression of all three Aurora kinase isoforms in germ cells raises questions about identifying their specific and redundant functions, oocyte and meiosis-specific roles and generally why germ cells require an additional isoform. Conditional knockout mice were used to address these questions and reveal additional information about regulation of oocyte meiosis. This chapter provides an update on recent findings uncovering more details on the role of Aurora kinases in oocyte meiosis. We dive into their individual functions during establishment of the meiotic spindle and coordinating chromosome alignment but also address newly discovered non-canonical roles in regulating mitochondria, translation, and cytokinesis. Understanding the functional implications of these kinases offers valuable insight into the fundamental processes that control meiosis and fertility.