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Genetic Manipulation of the Mouse Developing Hypothalamus through In utero Electroporation
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Gut-derived peptide hormone receptor expression in the developing mouse hypothalamus.

Lídia Cantacorps1,2, Bethany M Coull1, Joanne Falck1

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Gut-derived peptide hormone receptors in the developing hypothalamus are dynamically regulated. Their expression changes correlate with body weight, impacting early brain development and metabolic regulation.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Metabolism

Background:

  • Gut-derived peptide hormones regulate adult metabolism, including glucose homeostasis, food intake, and energy balance.
  • Receptors for these hormones are crucial for mediating their effects in adult organisms.

Purpose of the Study:

  • To investigate the expression and role of classical metabolic receptors in the early development of hypothalamic neuronal circuits.
  • To assess changes in gut-derived peptide hormone receptors during postnatal development.

Main Methods:

  • Quantitative PCR (qPCR) and Western Blot analyses were performed on hypothalamic tissue from developing mice (postnatal day 7-21).
  • Correlations between receptor expression, body weight, blood glucose, and leptin levels were analyzed.

Main Results:

  • Gene expression and protein regulation of key receptors, including Gastric Inhibitory Polypeptide Receptor (GIPR), Glucagon-Like Peptide 1 Receptor (GLP1R), and Cholecystokinin Receptor 2 (CCK2R), were characterized in the developing hypothalamus.
  • Changes in GIPR and Insulin Receptor (InsR) expression were negatively correlated with body weight.

Conclusions:

  • Maternal circulating gut hormones may directly influence offspring brain development.
  • Understanding these early developmental changes is crucial for metabolic health and neurodevelopment.