beta-Casomorphin-immunoreactivity in the brain stem of the human infant
Insights
Beta-casomorphin-8 (BC8) immunoreactivity was found in infant brain stems. These findings suggest beta-casomorphins may enter the brain and influence physiological regulation.
Area of Science:
- Neuroscience
- Biochemistry
- Pediatric Research
Background:
- Beta-casomorphins are opioid-active peptides derived from casein.
- Their presence and function in the infant brain are not fully understood.
Purpose of the Study:
- To investigate the presence and distribution of beta-casomorphin-8 immunoreactivity (BCIR) in the infant brain stem.
- To explore the potential role of beta-casomorphins in central physiological regulation.
Main Methods:
- Peptide extraction and reversed-phase high-performance liquid chromatography (RP-HPLC).
- Radioimmunoassay (RIA) using an antibody specific to human beta-casomorphin-8 (BC8).
- Analysis of brain stem tissue from eight infants.
Main Results:
- BCIR was detected in nineteen distinct areas of the mesencephalon, pons cerebri, and medulla oblongata.
- BCIR levels showed a rostrocaudally increasing gradient.
- The detected BCIR was attributed to BC8 and/or its congeners.
Conclusions:
- Beta-casomorphins are present in the infant brain stem.
- Specific transport mechanisms may facilitate blood-to-brain entry of beta-casomorphins.
- Beta-casomorphins may play a role in the central regulation of physiological phenomena.
Abstract:
Using a peptide extraction procedure, reversed phase high performance liquid chromatography, and a radioimmunoassay that utilized an antibody raised specifically against human beta-casomorphin-8 (BC8), BC-immunoreactivity (BCIR) was detected in rostrocaudally increasing levels in nineteen microscopically distinct and functionally relevant areas of mesencephalon, pons cerebri, and medulla oblongata of eight infants. On the basis of the methodology used, it can be concluded, that the BCIR present in their brain stem was due to BC8 and/or to some of its congeners. Data in the literature together with those of this study indicate that beta-casomorphins could be transported by specific mechanisms from the blood into the brain stem and that they could play a role in the central regulation of various physiological phenomena.
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