Related Experiment Videos
[Melatonin secretion in intracranial tumor]
N Yamada1, H Iwasa, N Kurokawa
1Department of Surgical Neurology, Omiya Medical Center, Jichi Medical School, Saitama, Japan.
No to Shinkei = Brain and Nerve
|February 1, 1990
Summary
Melatonin (MLT) secretion is significantly inhibited in patients with intracranial hypertension and midline shift, with a disrupted diurnal rhythm observed in most cases. This suggests MLT plays a role in this condition.
Area of Science:
- Neuroendocrinology
- Clinical Chemistry
Background:
- Intracranial hypertension (ICT) is a critical condition often associated with midline shift on CT scans.
- Melatonin (MLT), a key hormone regulating circadian rhythms, has potential neuroprotective roles.
- Understanding MLT secretion patterns in ICT is crucial for potential therapeutic interventions.
Observation:
- This study investigated plasma MLT levels in 6 ICT patients exhibiting midline shift and signs of intracranial hypertension.
- Blood samples were collected at four time points (14:00, 20:00, 02:00, 08:00) to assess diurnal MLT secretion.
- Radioimmunoassay (RIA) was employed to quantify MLT concentrations after extraction.
Findings:
- Control subjects exhibited a clear diurnal MLT rhythm, with significantly higher levels at 02:00 compared to other times.
- ICT patients displayed significantly lower MLT levels across most time points compared to controls.
- A disrupted diurnal MLT rhythm was observed in 67% of ICT patients, indicating impaired secretion.
Implications:
- The findings suggest that melatonin secretion is inhibited in ICT patients with midline shift.
- Disruption of the diurnal MLT rhythm may be a contributing factor or consequence of ICT.
- Further research into MLT's role could lead to novel diagnostic or therapeutic strategies for intracranial hypertension.