Synaptic proteins and phospholipids are increased in gerbil brain by administering uridine plus docosahexaenoic acid orally
Abstract
The synthesis of brain phosphatidylcholine may utilize three circulating precursors: choline; a pyrimidine (e.g., uridine, converted via UTP to brain CTP); and a PUFA (e.g., docosahexaenoic acid); phosphatidylethanolamine may utilize two of these, a pyrimidine and a PUFA. We observe that consuming these precursors can substantially increase membrane phosphatide and synaptic protein levels in gerbil brains. (Pyrimidine metabolism in gerbils, but not rats, resembles that in humans.) Animals received, daily for 4 weeks, a diet containing choline chloride and UMP (a uridine source) and/or DHA by gavage. Brain phosphatidylcholine rose by 13-22% with uridine and choline alone, or DHA alone, or by 45% with the combination, phosphatidylethanolamine and the other phosphatides increasing by 39-74%. Smaller elevations occurred after 1-3 weeks. The combination also increased the vesicular protein Synapsin-1 by 41%, the postsynaptic protein PSD-95 by 38% and the neurite neurofibrillar proteins NF-70 and NF-M by up to 102% and 48%, respectively. However, it had no effect on the cytoskeletal protein beta-tubulin. Hence, the quantity of synaptic membrane probably increased. The precursors act by enhancing the substrate saturation of enzymes that initiate their incorporation into phosphatidylcholine and phosphatidylethanolamine and by UTP-mediated activation of P2Y receptors. Alzheimer's disease brains contain fewer and smaller synapses and reduced levels of synaptic proteins, membrane phosphatides, choline and DHA. The three phosphatide precursors might thus be useful in treating this disease.
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Co-administration of uridine, docosahexaenoic acid, and choline can increase the amount of phospholipids, synaptic proteins, dendritic spine density and neurite outgrowth in rodents.
“Several studies in rodents showed that co-administration of uridine, DHA, and choline can increase the amount of phospholipids, synaptic proteins, dendritic spine density and neurite outgrowth (Holguin et al., 2008;Sakamoto et al., 2007;Wurtman et al., 2006).”
From The Gut-Brain Axis in Parkinson’s Disease: Possibilities for Food-Based Therapies (2017) · cites this paper as Wurtman et al., 2006
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- Authors
- Wurtman, R. J., Ulus, I. H., Cansev, M., Watkins, C. J., Wang, L., & Marzloff, G.
- Affiliations
- Massachusetts Institute of Technology (US)
- Bursa Uludağ Üni̇versi̇tesi̇ (TR)
- Corresponding author
- Wurtman, Richard J.
- Venue
- Brain Research
- Publisher
- Elsevier BV
- Published
- 2006-05
- Volume
- 1088
- Issue
- 1
- Pages
- 83-92
- ISSN
- 0006-8993 (ISSN-L)
- OpenAlex
- W1978524806
- Cited by
- 169
- References
- 45
- Citations by year
- 2026: 3 · 2025: 2 · 2024: 4 · 2023: 4 · 2022: 5 · 2021: 7 · 2020: 8 · 2019: 4 · 2018: 8 · 2017: 12 · 2016: 9 · 2015: 14 · 2014: 12 · 2013: 17 · 2012: 6
- FWCI
- 7.92
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Brain Research (publishedVersion)
- PubMed (publishedVersion)
- Bursa Uludag University - AVESIS (submittedVersion)
- Funders
- Türkiye Bilimler Akademisi
- National Institutes of Health
- U.S. Food and Drug Administration
- National Institute of Mental Health (MH 28783)
- Topics
- Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
- Life Sciences › Neuroscience › Neurology › Neurological Disorders and Treatments
- Keywords
- uridine, docosahexaenoic acid, choline, phosphatidylcholine synthesis, phosphatidylethanolamine, synaptic proteins, synapsin-1, PSD-95, neurofibrillary tangles, brain phospholipids, P2Y receptors, UTP, Alzheimer's disease, gerbil brain, dietary precursors
- MeSH terms
- Administration, Oral, Animals, Brain, Choline, Diet, Docosahexaenoic Acids, Gerbillinae, Male, Nerve Tissue Proteins, Phospholipids, Synapses, Time Factors, Uridine, Gene Expression, Synapsins
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