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Ghrelin in growth and development.

¹Endocrinology and Diabetes Unit, British Columbia's Children's Hospital, University of British Columbia, Vancouver, B.C., Canada. jchanoine@cw.bc.ca

Hormone Research

|March 30, 2005

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Ghrelin, a hormone influencing appetite and growth, plays a potential role in energy balance programming during development. Its levels change with age and are linked to conditions like Prader-Willi syndrome.

Area of Science:

Endocrinology
Developmental Biology
Metabolic Research

Background:

Ghrelin binds to the GH secretagogue receptor (GHS-R), increasing caloric intake and stimulating growth hormone (GH) secretion.
Ghrelin may inhibit adipogenesis via GHS-R-independent pathways.
Fetal ghrelin production is high in the pancreas, unlike adults where it's mainly from the stomach.

Purpose of the Study:

To explore the potential physiological role of ghrelin in programming energy balance mechanisms during fetal development.
To investigate the relationship between ghrelin concentrations, growth, puberty, and body mass index in humans.
To examine the implications of elevated ghrelin in Prader-Willi syndrome for understanding appetite regulation.

Main Methods:

Review of existing literature on ghrelin's role in development and metabolic regulation.

Related Experiment Videos

Analysis of ghrelin gene expression patterns in fetal and postnatal periods.

Correlation analysis of ghrelin levels with anthropometric and hormonal data in human subjects.

Main Results:

Ghrelin knockout studies indicate it's not essential for perinatal development under normal nutrition.
Fetal ghrelin metabolism suggests a role in programming beta-cell maturation, orexigenic pathways, and adipogenesis.
Human ghrelin levels decrease with age and puberty, inversely correlating with BMI and insulin, except in Prader-Willi syndrome.

Conclusions:

Ghrelin may contribute to the developmental programming of energy balance, impacting beta-cell function, appetite, and fat development.
Understanding ghrelin's dynamic changes throughout human growth is crucial for metabolic health.
Elevated ghrelin in Prader-Willi syndrome suggests a potential link to hyperphagia and warrants further investigation.