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Developmental pattern of VIP binding sites in the human hypothalamus

Mohamed Najimi1, Fatima Rachidi, Abdelkrim Afif

  • 1Laboratory of Functional and Pathologic Biology, Faculty of Sciences and Techniques, 23000 Béni-Mellal, Morocco. mnajimi1@fstbm.ac.ma

Annals of the New York Academy of Sciences
|August 5, 2006
PubMed

Insights

Vasoactive intestinal polypeptide (VIP) binding sites increase in the human hypothalamus after birth. Densities are higher in older infants in specific brain regions, suggesting VIP

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Endocrinology

Background:

  • Vasoactive intestinal polypeptide (VIP) is a neuropeptide with diverse physiological roles.
  • Understanding the developmental trajectory of VIP binding sites is crucial for comprehending hypothalamic development and function.

Purpose of the Study:

  • To investigate the developmental patterns of VIP binding sites in the human hypothalamus.
  • To identify specific hypothalamic regions exhibiting significant changes in VIP binding density during postnatal development.

Main Methods:

  • Autoradiographic analysis of VIP binding sites in human hypothalamus tissue samples across different developmental stages.
  • Quantitative assessment of VIP binding densities in various hypothalamic nuclei.

Main Results:

  • VIP recognition sites are broadly distributed throughout the human hypothalamus.
  • VIP binding densities are low in fetal and neonatal periods, increasing postnatally.
  • Significantly higher VIP binding densities were observed in older infants in the preoptic area, lamina terminalis, and infundibular (IN) nucleus.

Conclusions:

  • VIP receptor expression undergoes significant developmental changes in the human hypothalamus.
  • These developmental changes suggest a role for VIP in the maturation and functional maintenance of specific hypothalamic structures.

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