CART peptides as targets for CNS drug development

Area of Science:

• Neuroendocrinology
• Molecular Psychiatry
• Behavioral Neuroscience

Background:

• Cocaine- and amphetamine-regulated transcript (CART) peptides are novel neuropeptides derived from an 89-amino acid precursor.
• These peptides are widely distributed in the brain and peripheral organs, including the hypothalamus and mesolimbic dopamine system.
• Behavioral studies highlight CART peptides' involvement in feeding, locomotion, drug reward, and stress responses.

Purpose of the Study:

• To investigate the physiological roles of CART peptides in feeding behavior and reward pathways.
• To explore the potential therapeutic implications of CART peptides for obesity, psychostimulant abuse, and stress-related disorders.

Main Methods:

• Administration of CART peptides into the hypothalamus and ventral tegmental area (VTA) in animal models.
• Analysis of feeding behavior, locomotor activity, and conditioned place preference.
• Examination of CART peptide involvement in transgenic models and human studies related to obesity and anorexia.

Main Results:

• Intracerebroventricular injection of CART peptides demonstrated significant anorectic effects.
• CART peptides modulated locomotor activity and conditioned place preference, exhibiting psychostimulant-like effects.
• Studies linked CART peptides to obesity, anorexia, fear, and startle behaviors, suggesting roles in stress and anxiety.

Conclusions:

• CART peptides are key regulators of feeding, reward, and stress, with significant implications for neurological and psychiatric disorders.
• CART peptides represent promising therapeutic targets for obesity, psychostimulant addiction, and potentially schizophrenia and anxiety disorders.
• Identification of CART peptide receptors is crucial for developing novel therapeutics targeting these pathways.