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Expression of PAX2 gene during human development

J Terzić1, C Muller, S Gajović

  • 1Department of Physiology, Medical School, University of Split, PAK, KB Split, Croatia.

The International Journal of Developmental Biology
|August 26, 1998
PubMed
Summary
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The human paired-box-containing PAX2 gene is crucial for early development, particularly in the neural tube, brain, eyes, ears, and kidneys. Its spatially restricted expression guides the differentiation of these vital organs during human development.

Area of Science:

  • Developmental Biology
  • Human Embryology
  • Molecular Genetics

Background:

  • The paired-box-containing PAX2 gene plays a known role in kidney development.
  • Understanding PAX2 gene expression is vital for comprehending human organogenesis.

Purpose of the Study:

  • To investigate the spatiotemporal expression pattern of the human PAX2 gene during early embryonic development.
  • To identify specific embryonic tissues and structures where PAX2 is expressed.

Main Methods:

  • In situ hybridization using S35-labeled probes on serial cross-sections of human conceptuses (6-9 weeks gestation).
  • Analysis of PAX2 expression in the developing neural tube, brain, eyes, ears, and kidneys.

Main Results:

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  • PAX2 expression was observed along the neural tube's compartmental boundaries, including the spinal cord and rhombencephalon.
  • Specific expression patterns were noted in the developing eye (optic cup, stalk, disc, nerve) and ear (otic vesicle, utricle, cochlea).
  • PAX2 was also detected in developing kidneys, with restricted expression in specific zones.

    • Conclusions:

    • Human PAX2 exhibits a spatially restricted expression pattern during early development, particularly at compartmental boundaries within the neural tube.
    • PAX2 gene expression is implicated in the differentiation of the eye, ear, and kidneys during defined stages of human development.