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Transmembrane Signaling Protocols pp 139–152Cite as

Oocytes Microinjection Assay to Study the MAP-Kinase Cascade

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Part of the book series: Methods In Molecular Biology™ ((MIMB,volume 84))

Abstract

The oocytes of several organisms—most frequently those of the African clawed toad Xenopus laevis—have been used for many years as an excellent system to study regulation of transcription, translation, protein modification processes, secretion, and protein compartmentalization, as well as the expression of heterologous-membrane receptors and their association to specific signaling cascades. Full-grown oocytes are large cells (over 1.2 mm in diameter) that are arrested in late-G2 phase of the first meiosis (Meiosis I), and must progress after physiologrcal stimulus by progesterone to the second meiotrc metaphase (Meiosis II) before fertilization takes place. This process, called oocyte maturation or germinal vesicle breakdown (GVBD), can be easily visualized by the appearance of a small white spot in the animal pole, a consequence of the dissociation of the nuclear envelope. After GVBD is completed, if the oocytes have been fertilized, DNA synthesis takes places with the consequent initiation of the Meiosis II.

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Author information

Authors and Affiliations

  1. Institute de Investigaciones Biomédicas, Madrid, Spain

    Juan Carlos Lacal

Authors
  1. Juan Carlos Lacal
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Editor information

Editors and Affiliations

  1. State University of New York at Stony Brook, NY

    Dafna Bar-Sagi

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© 1998 Humana Press Inc.

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Lacal, J.C. (1998). Oocytes Microinjection Assay to Study the MAP-Kinase Cascade. In: Bar-Sagi, D. (eds) Transmembrane Signaling Protocols. Methods In Molecular Biology™, vol 84. Humana Press. https://doi.org/10.1385/0-89603-488-7:139

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  • DOI: https://doi.org/10.1385/0-89603-488-7:139

  • Publisher Name: Humana Press

  • Print ISBN: 978-0-89603-488-4

  • Online ISBN: 978-1-59259-568-6

  • eBook Packages: Springer Protocols

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