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Related Experiment Videos

Developmental expression profiles of Xenopus laevis reference genes.

Radek Sindelka1, Zoltán Ferjentsik, Jirí Jonák

  • 1Department of Gene Expression, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague, Czech Republic.

Developmental Dynamics : an Official Publication of the American Association of Anatomists
|January 7, 2006
PubMed
Summary

Commonly used reference genes like eEF-1 alpha and GAPDH show variable expression during Xenopus laevis development. This variability impacts accurate mRNA quantification, suggesting total RNA normalization is a more reliable method.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Gene Expression Analysis

Background:

  • Accurate quantification of specific mRNA expression is crucial for understanding cell differentiation.
  • Reference genes are typically used for normalization, assuming stable expression across conditions.
  • Established reference genes in Xenopus laevis include eEF-1 alpha, GAPDH, ODC, L8, and H4.

Purpose of the Study:

  • To evaluate the expression stability of five commonly used reference genes during early Xenopus laevis development.
  • To determine the suitability of these genes for accurate mRNA quantification in developmental studies.
  • To identify potential issues with current normalization practices in Xenopus research.

Main Methods:

  • Real-time reverse transcription polymerase chain reaction (RT-PCR) was employed.

Related Experiment Videos

  • Expression profiles of eEF-1 alpha, GAPDH, ODC, L8, and H4 were analyzed.
  • Analysis focused on early developmental stages of Xenopus laevis.

    • Main Results:

    • Significant variations in expression profiles were observed for all five tested reference genes throughout Xenopus laevis development.
    • The expression levels of these genes were not constant during the early developmental period.
    • Developmental stage-specific changes in reference gene mRNA levels were substantial.

    Conclusions:

    • The use of commonly employed reference genes (eEF-1 alpha, GAPDH, ODC, L8, H4) for mRNA quantification in Xenopus laevis is compromised by their variable expression during development.
    • Relative mRNA quantification based on these reference genes can lead to inaccurate comparisons between different developmental stages.
    • Normalization against total RNA is recommended as a more robust alternative for accurate gene expression analysis in Xenopus laevis development.