Natural killer cells: molecular mechanisms & dependencies

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.

Human evidence only

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.

Recorded relationships

Where it participates (unsigned role)

When phagocyte or natural killer cell CR3 adheres to iC3b on erythrocytes or tumour cells that lack CR3-binding membrane polysaccharides neither lysis nor cytotoxicity are stimulated, but soluble CR3-specific polysaccharides such as beta-glucan induced a primed state of CR3 that could trigger killing of iC3b-target cells that were otherwise resistant to cytotoxicity, priming required tyrosine kinases and a magnesium-dependent conformational change of the I-domain that exposed the CBRM1/5 activation epitope, and unlike LPS or cytokines polysaccharides did not up-regulate neutrophil CR3 expression nor expose the high affinity ICAM-1-binding state.
Beta-glucan → The primed state of complement receptor 3 source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/glucan-research/8690804.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "e6e6ce1cbb7d4a4d3170e4b86ac33d4b3220d59645c53d757fe3a2681397287e", "start_char": 0, "end_char": 1478, "text_sha256": "e6e6ce1cbb7d4a4d3170e4b86ac33d4b3220d59645c53d757fe3a2681397287e"}
experimental_model
Priming of neutrophil and natural killer cell CR3 with soluble polysaccharide, then challenge with iC3b-coated targets
exposure
Soluble CR3-specific polysaccharides including beta-glucan, with antibody blockade before or after the sugar
limitations
An in vitro cytotoxicity mechanism. It establishes how priming works and what it requires, not that the same sequence occurs in a treated patient.
nutrient_topic
Beta-glucan research collection; topical membership is not evidence of a direct clinical effect, and each preparation is recorded as its own entity with no family link joining any pair. · Beta-glucan
organism
Human
plain_language
The sugar does not make the killer cell find the tumour; it changes the receptor so that a target it was already touching becomes one it will kill.
primary_references
[bg-p8690804] Soluble beta-glucan polysaccharide binding to the lectin site of neutrophil or natural killer cell complement receptor type 3 (CD11b/CD18) generates a primed state of the receptor capable of mediating cytotoxicity of iC3b-opsonized target cells. (1996). https://pubmed.ncbi.nlm.nih.gov/8690804/ DOI: 10.1172/jci118777
tissue_or_cell_type
Neutrophil and natural killer cell
Beta-glucan: a structural family rather than an agent, what decides whether a bound glucan actually signals, the complement route that a cereal and a yeast preparation share, and the unequal human evidence behind each (2026-09-22) · lines 216–227
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Priming of neutrophil and natural killer cell CR3 with soluble polysaccharide, then challenge with iC3b-coated targets · source_derived_draft · unverified_draft
### bg-soluble-glucan-primes-cr3 When phagocyte or natural killer cell CR3 adheres to iC3b on erythrocytes or tumour cells that lack CR3-binding membrane polysaccharides neither lysis nor cytotoxicity are stimulated, but soluble CR3-specific polysaccharides such as beta-glucan induced a primed state of CR3 that could trigger killing of iC3b-target cells that were otherwise resistant to cytotoxicity, priming required tyrosine kinases and a magnesium-dependent conformational change of the I-domain that exposed the CBRM1/5 activation epitope, and unlike LPS or cytokines polysaccharides did not up-regulate neutrophil CR3 expression nor expose the high affinity ICAM-1-binding state. Condition category: normal nutrient_topic: Beta-glucan research collection; topical membership is not evidence of a direct clinical effect, and each preparation is recorded as its own entity with no family link joining any pair. plain_language: The sugar does not make the killer cell find the tumour; it changes the receptor so that a target it was already touching becomes one it will kill. organism: Human tissue_or_cell_type: Neutrophil and natural killer cell experimental_model: Priming of neutrophil and natural killer cell CR3 with soluble polysaccharide, then challenge with iC3b-coated targets limitations: An in vitro cytotoxicity mechanism. It establishes how priming works and what it requires, not that the same sequence occurs in a treated patient. exposure: Soluble CR3-specific polysaccharides including beta-glucan, with antibody blockade before or after the sugar evidence_span: {"source_cache": "artifacts/glucan-research/8690804.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "e6e6ce1cbb7d4a4d3170e4b86ac33d4b3220d59645c53d757fe3a2681397287e", "start_char": 0, "end_char": 1478, "text_sha256": "e6e6ce1cbb7d4a4d3170e4b86ac33d4b3220d59645c53d757fe3a2681397287e"} [bg-p8690804] Soluble beta-glucan polysaccharide binding to the lectin site of neutrophil or natural killer cell complement receptor type 3 (CD11b/CD18) generates a primed state of the receptor capable of mediating cytotoxicity of iC3b-opsonized target cells. (1996). https://pubmed.ncbi.nlm.nih.gov/8690804/ DOI: 10.1172/jci118777
Complete structured claim and evidence
Telomere length of T helper, T cytotoxic, natural killer and B cells increased by over 20% after 60 sessions, with B cells rising 37.63% after the course.
Hyperbaric oxygen therapy → Telomere length in peripheral blood mononuclear cells source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/hbot-research/33206062.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "3ac16eb39be25c350e6a42fff6ee8cbf22159514a750bc3c7bafcbf734f03ecf", "start_char": 0, "end_char": 1622, "text_sha256": "3ac16eb39be25c350e6a42fff6ee8cbf22159514a750bc3c7bafcbf734f03ecf"}
experimental_model
Prospective trial of 35 healthy independently living adults aged 64 and over
exposure
Sixty daily hyperbaric oxygen exposures, sampled at baseline, 30 and 60 sessions and after the course
limitations
A single-arm prospective trial without a control group, in a normal ageing population. Telomere length and senescent-cell percentage are cell measurements, not health outcomes.
nutrient_topic
Hyperbaric oxygen research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake. · Hyperbaric oxygen therapy
organism
Human
plain_language
A marker of cell ageing moved in the opposite direction to ageing.
primary_references
[hbot-p33206062] Hyperbaric oxygen therapy increases telomere length and decreases immunosenescence in isolated blood cells: a prospective trial. (2020). https://pubmed.ncbi.nlm.nih.gov/33206062/ DOI: 10.18632/aging.202188
tissue_or_cell_type
Peripheral blood mononuclear cells
Hyperbaric oxygen: the exposure, its reactive species, the signals they carry, and the nutrient-dependent enzymes that handle them (2026-09-19) · lines 1115–1126
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Prospective trial of 35 healthy independently living adults aged 64 and over · source_derived_draft · unverified_draft
### hbot-telomere-lengthening Telomere length of T helper, T cytotoxic, natural killer and B cells increased by over 20% after 60 sessions, with B cells rising 37.63% after the course. Condition category: normal nutrient_topic: Hyperbaric oxygen research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake. plain_language: A marker of cell ageing moved in the opposite direction to ageing. organism: Human tissue_or_cell_type: Peripheral blood mononuclear cells experimental_model: Prospective trial of 35 healthy independently living adults aged 64 and over limitations: A single-arm prospective trial without a control group, in a normal ageing population. Telomere length and senescent-cell percentage are cell measurements, not health outcomes. exposure: Sixty daily hyperbaric oxygen exposures, sampled at baseline, 30 and 60 sessions and after the course evidence_span: {"source_cache": "artifacts/hbot-research/33206062.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "3ac16eb39be25c350e6a42fff6ee8cbf22159514a750bc3c7bafcbf734f03ecf", "start_char": 0, "end_char": 1622, "text_sha256": "3ac16eb39be25c350e6a42fff6ee8cbf22159514a750bc3c7bafcbf734f03ecf"} [hbot-p33206062] Hyperbaric oxygen therapy increases telomere length and decreases immunosenescence in isolated blood cells: a prospective trial. (2020). https://pubmed.ncbi.nlm.nih.gov/33206062/ DOI: 10.18632/aging.202188
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.

Natural killer cells