CSF-endorphines in acute and chronic brain lesions

Area of Science:

• Neuroscience
• Endocrinology
• Biochemistry

Background:

• Opioid peptides like beta-endorphin play roles in the central nervous system.
• Understanding the relationship between endogenous opioids and consciousness is crucial for neurological research.

Purpose of the Study:

• To investigate the influence of opioid peptides, specifically beta-endorphin (beta-END) and beta-lipotropic hormone (beta-LPH), on human consciousness.
• To quantify beta-END and beta-LPH levels in cerebrospinal fluid (CSF) and blood plasma of neurosurgical patients.

Main Methods:

• Radio-immunoassay was used to measure beta-END and beta-LPH levels.
• Samples were collected from ventricular CSF and blood plasma of 101 neurosurgical patients.
• Data analysis considered factors like sex, age, time of day, consciousness level, blood pressure, and disease type.

Main Results:

• Beta-END and beta-LPH levels were lower in CSF compared to blood plasma.
• CSF beta-END levels decreased with age and showed diurnal variations.
• A significant correlation was observed between lower CSF beta-END levels and reduced consciousness or comatous states.
• CSF beta-END levels increased with higher systolic arterial blood pressure.

Conclusions:

• Opioid peptide levels in CSF, particularly beta-END, are linked to the state of consciousness.
• These findings suggest a potential role for endogenous opioids in modulating consciousness in neurological conditions.