Component
Osteoclast
Independent biological entity. Read linked claims for experimental scope and context.
3 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 it acts on
Resorbing osteoclasts acidified the extracellular compartment beneath their ruffled border and reacidified it after ammonium chloride washout.
Experimental context and source evidence
- compartment_description
- Sealed extracellular resorption lacuna
- experimental_model
- Acridine-orange localization and reversible pH perturbation
- limitations
- This study localizes acidification; it does not identify a particular modern proton-pump subunit or measure whole-body calcium flux.
- nutrient_topic
- Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
- organism
- Gallus gallus
- plain_language
- Bone-resorbing cells create a locally acidic space against bone.
- primary_references
- [baron1985] Cell-mediated extracellular acidification and bone resorption: evidence for a low pH in resorbing lacunae and localization of a 100-kD lysosomal membrane protein at the osteoclast ruffled border (1985). https://rupress.org/jcb/article/101/6/2210/21648/Cell-mediated-extracellular-acidification-and-bone DOI: 10.1083/jcb.101.6.2210
- tissue_or_cell_type
- Osteoclast-bone interface
Calcium: mechanism-first literature curation (2026-09-17) · lines 1081–1091
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Acridine-orange localization and reversible pH perturbation · source_derived_draft · unverified_draft
### osteoclast-lacuna-acidification Resorbing osteoclasts acidified the extracellular compartment beneath their ruffled border and reacidified it after ammonium chloride washout. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Bone-resorbing cells create a locally acidic space against bone. organism: Gallus gallus tissue_or_cell_type: Osteoclast-bone interface experimental_model: Acridine-orange localization and reversible pH perturbation limitations: This study localizes acidification; it does not identify a particular modern proton-pump subunit or measure whole-body calcium flux. compartment_description: Sealed extracellular resorption lacuna [baron1985] Cell-mediated extracellular acidification and bone resorption: evidence for a low pH in resorbing lacunae and localization of a 100-kD lysosomal membrane protein at the osteoclast ruffled border (1985). https://rupress.org/jcb/article/101/6/2210/21648/Cell-mediated-extracellular-acidification-and-bone DOI: 10.1083/jcb.101.6.2210
Complete structured claim and evidence
Where it participates (unsigned role)
A calcium-deficient diet increased osteoclasts and bone loss in adult mice; osteocyte-directed Rankl deletion blunted the response.
Experimental context and source evidence
- availability_state
- nutrient_deficiency Imported condition classification; unverified.
- experimental_model
- 30 days of 0.01% versus 0.516% dietary calcium
- limitations
- Mouse diet and Cre-targeting scope limit human generalization; bone loss was blunted, not necessarily abolished.
- nutrient_topic
- Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
- organism
- Mus musculus
- plain_language
- When dietary calcium was severely restricted, osteocyte RANKL helped drive withdrawal from bone.
- primary_references
- [xiong2014] Osteocyte-derived RANKL is a critical mediator of the increased bone resorption caused by dietary calcium deficiency (2014). https://pmc.ncbi.nlm.nih.gov/articles/PMC4125539/ DOI: 10.1016/j.bone.2014.06.006
- tissue_or_cell_type
- Adult cortical and cancellous bone
- trigger_kind
- nutrient_deficiency Imported condition classification; unverified.
Calcium: mechanism-first literature curation (2026-09-17) · lines 1070–1079
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · 30 days of 0.01% versus 0.516% dietary calcium · source_derived_draft · unverified_draft
### low-calcium-diet-osteocyte-rankl-resorption A calcium-deficient diet increased osteoclasts and bone loss in adult mice; osteocyte-directed Rankl deletion blunted the response. Condition category: nutrient_deficiency nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: When dietary calcium was severely restricted, osteocyte RANKL helped drive withdrawal from bone. organism: Mus musculus tissue_or_cell_type: Adult cortical and cancellous bone experimental_model: 30 days of 0.01% versus 0.516% dietary calcium limitations: Mouse diet and Cre-targeting scope limit human generalization; bone loss was blunted, not necessarily abolished. [xiong2014] Osteocyte-derived RANKL is a critical mediator of the increased bone resorption caused by dietary calcium deficiency (2014). https://pmc.ncbi.nlm.nih.gov/articles/PMC4125539/ DOI: 10.1016/j.bone.2014.06.006
Complete structured claim and evidenceSoluble RANKL/ODF supported osteoclast-like-cell formation from mouse spleen precursors in the presence of M-CSF without osteoblast/stromal coculture.
Experimental context and source evidence
- experimental_model
- Recombinant ligand culture assay
- limitations
- M-CSF and culture context are required; this is not a calcium-supplement response.
- nutrient_topic
- Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
- organism
- Mus musculus
- plain_language
- A bone-cell signal can instruct precursors to become bone-resorbing cells.
- primary_references
- [yasuda1998] Osteoclast differentiation factor is a ligand for osteoprotegerin/osteoclastogenesis-inhibitory factor and is identical to TRANCE/RANKL (1998). https://pmc.ncbi.nlm.nih.gov/articles/PMC19881/ DOI: 10.1073/pnas.95.7.3597
- tissue_or_cell_type
- Spleen-derived osteoclast precursors
Calcium: mechanism-first literature curation (2026-09-17) · lines 1036–1045
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Recombinant ligand culture assay · source_derived_draft · unverified_draft
### rankl-promotes-osteoclast-differentiation Soluble RANKL/ODF supported osteoclast-like-cell formation from mouse spleen precursors in the presence of M-CSF without osteoblast/stromal coculture. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: A bone-cell signal can instruct precursors to become bone-resorbing cells. organism: Mus musculus tissue_or_cell_type: Spleen-derived osteoclast precursors experimental_model: Recombinant ligand culture assay limitations: M-CSF and culture context are required; this is not a calcium-supplement response. [yasuda1998] Osteoclast differentiation factor is a ligand for osteoprotegerin/osteoclastogenesis-inhibitory factor and is identical to TRANCE/RANKL (1998). https://pmc.ncbi.nlm.nih.gov/articles/PMC19881/ DOI: 10.1073/pnas.95.7.3597
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.