[Prolactin secretion in patients with essential obesity]

Area of Science:

• Endocrinology
• Neuroendocrinology
• Obesity Research

Background:

• Essential obesity affects a significant population, with potential links to neuroendocrine dysregulation.
• Understanding the heterogeneity of obesity is crucial for identifying distinct pathophysiological mechanisms.

Purpose of the Study:

• To investigate prolactin (PRL) secretion patterns in women with essential obesity.
• To differentiate neuroendocrine profiles between adult-onset and childhood-onset obesity.

Main Methods:

• Examined 17 women with essential obesity, divided into adult-onset (Group A, n=9) and childhood-onset (Group B, n=8).
• Measured fasting and TRH-stimulated plasma prolactin (PRL) levels.
• Assessed insulin-induced hypoglycemia (IRI), growth hormone (GH), and glycemia responses to TRH.

Main Results:

• Group A exhibited higher fasting and TRH-stimulated PRL levels compared to controls.
• Group B showed higher basal PRL levels and global secretory areas than controls and Group A.
• No significant changes in IRI, GH, or glycemia were observed in response to TRH across groups.

Conclusions:

• Prolactin behavior may serve as a key physiopathological marker in obesity.
• Distinct neuroendocrine hypothalamic homeostasis exists within the heterogeneous obese population.
• These findings highlight the importance of considering obesity onset in neuroendocrine evaluations.