The vitamin D receptor in dopamine neurons; its presence in human substantia nigra and its ontogenesis in rat midbrain.
Level 5 - mechanism / opinion, no new human data
Post-mortem human tissue analysis and animal developmental bench research
PubMed 23352937 · doi:10.1016/j.neuroscience.2013.01.035
What was done
The authors examined the presence and developmental timeline of the vitamin D receptor (VDR) in tyrosine hydroxylase (TH)-positive dopaminergic neurons in human and rat substantia nigra. In rats, midbrain VDR ontogenesis from embryonic stages through weaning was characterized using immunohistochemistry, real-time PCR, and western blot assays.
What was found
No numerical values were reported in the abstract. VDR was detected in the nucleus of TH-positive dopaminergic neurons in both human and rat substantia nigra. In rats, midbrain VDR expression emerged between embryonic day 12 (E12) and E15 and increased continuously until weaning.
Why it matters
Demonstrating nuclear VDR expression directly within dopaminergic neurons during early ontogeny establishes a plausible cellular mechanism for how maternal or early-life vitamin D status influences dopaminergic pathway development.
Limits
Sample sizes, tissue donor characteristics, and quantitative metrics (such as fold-change values or optical densities) are not reported in the abstract. The study is descriptive and does not test functional outcomes or causal downstream consequences of VDR activation or deficiency.
Cited by
- supports Vitamin D has specific receptors in the brainstem.