Component
Parathyroid hormone gene transcription
Independent biological entity. Read linked claims for experimental scope and context.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What acts on it
Calcitriol administration suppresses parathyroid PTH transcription in rats without a measured rise in serum calcium.
Experimental context and source evidence
- experimental_model
- Vitamin D metabolite administration to rats; parathyroid RNA and nuclear transcription assays
- limitations
- Administered hormone and transcription assay; does not resolve every promoter mechanism.
- nutrient_topic
- Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
- organism
- Rattus norvegicus
- plain_language
- Active vitamin D feeds back on hormone production.
- primary_references
- [silver1986] Regulation by vitamin D metabolites of parathyroid hormone gene transcription in vivo in the rat (1986). https://pubmed.ncbi.nlm.nih.gov/3771798/ DOI: 10.1172/JCI112714
- tissue_or_cell_type
- Parathyroid
Calcium: mechanism-first literature curation (2026-09-17) · lines 80–89
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Vitamin D metabolite administration to rats; parathyroid RNA and nuclear transcription assays · source_derived_draft · unverified_draft
### calcitriol-suppresses-pth-transcription Calcitriol administration suppresses parathyroid PTH transcription in rats without a measured rise in serum calcium. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Active vitamin D feeds back on hormone production. organism: Rattus norvegicus tissue_or_cell_type: Parathyroid experimental_model: Vitamin D metabolite administration to rats; parathyroid RNA and nuclear transcription assays limitations: Administered hormone and transcription assay; does not resolve every promoter mechanism. [silver1986] Regulation by vitamin D metabolites of parathyroid hormone gene transcription in vivo in the rat (1986). https://pubmed.ncbi.nlm.nih.gov/3771798/ DOI: 10.1172/JCI112714
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.