Component
Human S100A8 / calgranulin A
Context-specific entity; species, compartment and exposure are stated on each claim.
2 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.
Where it participates (unsigned role)
Butyrate exposure during human monocyte differentiation increased S100A8/S100A9 expression and calprotectin protein in the resulting macrophages.
Experimental context and source evidence
- evidence_access
- Primary full text, Figure 4 and results
- experimental_model
- Human donor monocyte-derived macrophages.
- limitations
- Expression alone does not identify which antimicrobial chemical mechanism operated.
- nutrient_topic
- Butyrate collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Butyrate
- plain_language
- The cells produced more of a two-protein antimicrobial complex.
- primary_references
- The Short Chain Fatty Acid Butyrate Imprints an Antimicrobial Program in Macrophages. · 2019 · https://pubmed.ncbi.nlm.nih.gov/30683619/ · DOI 10.1016/j.immuni.2018.12.018
Butyrate: microbial production, fuel use, signaling and nutrient interactions (2026-09-19) · lines 438–444
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Human donor monocyte-derived macrophages. · source_derived_draft · unverified_draft
## butyrate-calprotectin-expression The cells produced more of a two-protein antimicrobial complex. Butyrate exposure during human monocyte differentiation increased S100A8/S100A9 expression and calprotectin protein in the resulting macrophages. Model: Human donor monocyte-derived macrophages. Limitations: Expression alone does not identify which antimicrobial chemical mechanism operated. Evidence access: Primary full text, Figure 4 and results The Short Chain Fatty Acid Butyrate Imprints an Antimicrobial Program in Macrophages. · 2019 · https://pubmed.ncbi.nlm.nih.gov/30683619/ · DOI 10.1016/j.immuni.2018.12.018
Complete structured claim and evidenceCombined S100A8/S100A9 siRNA increased the intracellular bacterial load in butyrate-differentiated human macrophages.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence_access
- Primary full text, Figure 4G and results
- experimental_model
- Human macrophages, dual gene silencing and Salmonella gentamicin-protection assay.
- limitations
- This perturbation supports a calprotectin contribution; it does not isolate zinc or manganese sequestration as the operative mechanism.
- nutrient_topic
- Butyrate collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Butyrate
- plain_language
- Reducing both components weakened the antimicrobial response.
- primary_references
- The Short Chain Fatty Acid Butyrate Imprints an Antimicrobial Program in Macrophages. · 2019 · https://pubmed.ncbi.nlm.nih.gov/30683619/ · DOI 10.1016/j.immuni.2018.12.018
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Butyrate: microbial production, fuel use, signaling and nutrient interactions (2026-09-19) · lines 446–452
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Human macrophages, dual gene silencing and Salmonella gentamicin-protection assay. · source_derived_draft · unverified_draft
## butyrate-calprotectin-silencing Reducing both components weakened the antimicrobial response. Combined S100A8/S100A9 siRNA increased the intracellular bacterial load in butyrate-differentiated human macrophages. Model: Human macrophages, dual gene silencing and Salmonella gentamicin-protection assay. Limitations: This perturbation supports a calprotectin contribution; it does not isolate zinc or manganese sequestration as the operative mechanism. Evidence access: Primary full text, Figure 4G and results The Short Chain Fatty Acid Butyrate Imprints an Antimicrobial Program in Macrophages. · 2019 · https://pubmed.ncbi.nlm.nih.gov/30683619/ · DOI 10.1016/j.immuni.2018.12.018
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.