Related Experiment Videos
Pineal response after pyridoxine test in children
A Muñoz-Hoyos1, I Amorós-Rodríguez, A Molina-Carballo
1Departamento de Pediatría, Hospital Universitario, Facultad de Medicina, Universidad de Granada, Spain.
Insights
Vitamin B6 (pyridoxine) significantly boosts melatonin production in children when administered at night. This finding highlights pyridoxine
Area of Science:
- Pediatric Endocrinology
- Neurobiology
- Nutritional Science
Background:
- The pineal gland produces melatonin, a hormone crucial for regulating sleep-wake cycles.
- Vitamin B6 (pyridoxine) is a vital nutrient involved in numerous metabolic processes, including neurotransmitter synthesis.
Purpose of the Study:
- To investigate the effect of pyridoxine administration on plasma melatonin levels in children.
- To determine if pyridoxine influences pineal gland activity in a time-dependent manner.
Main Methods:
- Plasma melatonin concentrations were measured using radioimmunoassay in 120 children aged 1.5-8 years.
- Children were divided into four groups: control day, control night, pyridoxine day, and pyridoxine night.
- Pyridoxine was administered intravenously (3 mg/kg) to the respective groups during daytime or nighttime.
Main Results:
- Pyridoxine administration significantly increased melatonin levels in the pyridoxine night group (39.87 pg/ml basal vs 88.45 pg/ml post-administration, p < 0.001).
- No significant changes in melatonin concentrations were observed in the control groups or the pyridoxine day group.
- Nocturnal pyridoxine administration demonstrated a potent stimulating effect on melatonin production.
Conclusions:
- Nocturnal administration of pyridoxine stimulates melatonin production in children.
- Vitamin B6 may play a role in regulating circadian rhythms through its influence on melatonin synthesis.
- Further research is warranted to explore the therapeutic potential of pyridoxine in sleep and circadian rhythm disorders.
Abstract:
To characterize the pineal response to pyridoxine, plasma melatonin was measured in one hundred and twenty children 3 hours after vitamin B6 administration. The children, aged between 1.5 and 8 years, were divided in four groups as follows: a) control day group, grouping 27 children sampled at 9:00 and at 12:00; b) control night group, grouping 29 children sampled at 21:00 and at 24:00; c) pyridoxine day group, grouping 30 children sampled at 9:00, then intravenously (i.v.) injected with 3 mg/kg of pyridoxine, and sampled at 12:00; and d) pyridoxine night group, grouping 34 children sampled at 21:00, i.v. injected with 3 mg/kg of pyridoxine, and sampled at 24:00. Melatonin concentration was measured by radioimmuno assay. The data obtained showed a significant increase in melatonin levels after pyridoxine administration in the pyridoxine night group (39.87 +/- 8.02 pg/ml basal vs 88.45 +/- 9.21 pg/ml after pyridoxine, p < 0.001). The other groups did not showed significant differences in melatonin concentrations. Statistical analysis shows that the administration of pyridoxine during the nocturnal hours represents a stimulating factor to increase the pineal production of melatonin in children.