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[Orexins--new hypothalamic peptides that stimulate appetite]
1Institutionen för neurovetenskap, Karolinska institutet, Stockholm.
Lakartidningen
|January 16, 1999
Summary
Newly discovered hypothalamus peptides, orexins, stimulate appetite. These peptides, orexin A and orexin B, are key to understanding brain regulation of food intake.
Area of Science:
- Neuroscience
- Endocrinology
- Molecular Biology
Context:
- The lateral hypothalamus is a critical brain region for regulating food intake.
- Recent discovery of novel hypothalamus-specific peptides, termed orexins.
Purpose:
- To characterize the novel orexin peptides and their role in appetite regulation.
- To investigate the expression and function of orexin A and orexin B.
Summary:
- Orexins, derived from a common precursor, are hypothalamus-specific peptides that stimulate appetite.
- Orexin A and orexin B bind to specific G-protein-coupled receptors, OX-1R and OX-2R.
- Gene expression of orexins occurs bilaterally in the lateral hypothalamus.
Impact:
- Advances understanding of the central neural mechanisms governing appetite and food intake.
- Identifies orexins and their receptors as potential targets for metabolic disorder therapies.