beta-Endorphin: intranasal administration increases the serum prolactin level in monkey

Area of Science:

• Neuroendocrinology
• Pharmacology

Background:

• Human beta-endorphin is a key neurohormone involved in various physiological processes.
• Understanding effective delivery methods for neurohormones is crucial for therapeutic applications.

Purpose of the Study:

• To compare the efficacy of nasal spray versus intravenous administration of human beta-endorphin.
• To investigate the impact of beta-endorphin on serum prolactin levels in a primate model.

Main Methods:

• Female bonnet monkeys received human beta-endorphin (0.02 mg/kg) via nasal spray.
• The same dose was administered intravenously for comparison.
• Serum prolactin levels were monitored at 30 and 60 minutes post-administration.

Main Results:

• Nasal spray administration led to a significant increase in serum prolactin within 30 minutes, sustained up to 60 minutes.
• Intravenous injection resulted in only a marginal prolactin increase after 60 minutes.
• Nasal delivery demonstrated superior and faster-acting effects on prolactin levels.

Conclusions:

• Nasal spray administration of human beta-endorphin is a more effective method for increasing prolactin levels compared to intravenous injection.
• This study highlights the potential of intranasal delivery for neurohormone-based therapies.