Oral choline increases choline metabolites in human brain

Area of Science:

• Neuroscience
• Biochemistry
• Medical Imaging

Background:

• Choline is vital for neurotransmitter and cell membrane synthesis.
• Dietary intake is the primary source of choline.
• Previous studies yielded conflicting results on whether oral choline increases brain choline levels in humans.

Purpose of the Study:

• To investigate if oral choline ingestion leads to detectable increases in brain choline levels in humans.
• To minimize intra-subject variance for enhanced detection sensitivity.
• To compare human brain choline responses to animal study findings.

Main Methods:

• Proton magnetic resonance spectroscopy ((1)H-MRS) was used for continuous scanning over 2.5 hours.
• Eleven healthy young males underwent scans after choline ingestion.
• Nine subjects also underwent identical scans without choline for control.

Main Results:

• A statistically significant increase in the choline signal (Cho) was detected in the left putamen after choline ingestion.
• The choline signal was measured relative to creatine (Cr) and N-acetylaspartate (NAA).
• Mean increases were 6.2% for Cho/Cr and 3.0% for Cho/NAA, peaking around 2 hours post-ingestion.

Conclusions:

• Proton magnetic resonance spectroscopy ((1)H-MRS) can detect significant increases in brain choline-containing compounds after oral choline administration in young humans.
• The observed increase suggests a potential 10-22% rise in phosphocholine.
• Findings support the efficacy of dietary choline in elevating brain choline metabolites in humans.