Beta-(1->3)-linked gluco-oligosaccharides: molecular mechanisms & dependencies

How nutrients influence it

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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

What acts on it

Barley and yeast beta-1,3-glucan were labelled with fluorescein to track their oral uptake and processing in vivo, orally administered beta-1,3-glucans were taken up by macrophages that transported them to spleen, lymph nodes and bone marrow, within the bone marrow the macrophages degraded the large beta-1,3-glucans into smaller soluble beta-1,3-glucan fragments that were taken up by the CR3 of marginated granulocytes, and these granulocytes with CR3-bound beta-1,3-glucan-fluorescein were shown to kill iC3b-opsonized tumour cells following their recruitment to a site of complement activation resembling a tumour coated with monoclonal antibody.
Transport of ingested glucan by macrophages to spleen, lymph node and marrow → Beta-(1->3)-linked gluco-oligosaccharides source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/glucan-research/15240666.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "eaff7297fa40df19ef82e5e1de433ec0cf34590a7e3fda6aa6061e0922666781", "start_char": 0, "end_char": 1454, "text_sha256": "eaff7297fa40df19ef82e5e1de433ec0cf34590a7e3fda6aa6061e0922666781"}
experimental_model
Fluorescein-labelled oral glucans tracked through macrophages to marrow, with therapy in C3-deficient and CR3-deficient mice
exposure
Orally administered barley beta-1,3;1,4-glucan and orally administered yeast beta-1,3;1,6-glucan, each with antitumour monoclonal antibody
limitations
The single experiment in this collection that tested a cereal mixed-linkage glucan and a yeast branched glucan side by side in the same protocol. It is a mouse tumour model, and oral uptake in mice does not establish the same uptake in people.
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
Mouse
plain_language
Swallowed glucan is carried to the marrow inside macrophages, cut up there, and handed to granulocytes on the way out.
primary_references
[bg-p15240666] Mechanism by which orally administered beta-1,3-glucans enhance the tumoricidal activity of antitumor monoclonal antibodies in murine tumor models. (2004). https://pubmed.ncbi.nlm.nih.gov/15240666/ DOI: 10.4049/jimmunol.173.2.797
tissue_or_cell_type
Gut, spleen, lymph node, bone marrow and tumour
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 255–266
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Fluorescein-labelled oral glucans tracked through macrophages to marrow, with therapy in C3-deficient and CR3-deficient mice · source_derived_draft · unverified_draft
### bg-macrophages-carry-and-cut-it Barley and yeast beta-1,3-glucan were labelled with fluorescein to track their oral uptake and processing in vivo, orally administered beta-1,3-glucans were taken up by macrophages that transported them to spleen, lymph nodes and bone marrow, within the bone marrow the macrophages degraded the large beta-1,3-glucans into smaller soluble beta-1,3-glucan fragments that were taken up by the CR3 of marginated granulocytes, and these granulocytes with CR3-bound beta-1,3-glucan-fluorescein were shown to kill iC3b-opsonized tumour cells following their recruitment to a site of complement activation resembling a tumour coated with monoclonal antibody. 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: Swallowed glucan is carried to the marrow inside macrophages, cut up there, and handed to granulocytes on the way out. organism: Mouse tissue_or_cell_type: Gut, spleen, lymph node, bone marrow and tumour experimental_model: Fluorescein-labelled oral glucans tracked through macrophages to marrow, with therapy in C3-deficient and CR3-deficient mice limitations: The single experiment in this collection that tested a cereal mixed-linkage glucan and a yeast branched glucan side by side in the same protocol. It is a mouse tumour model, and oral uptake in mice does not establish the same uptake in people. exposure: Orally administered barley beta-1,3;1,4-glucan and orally administered yeast beta-1,3;1,6-glucan, each with antitumour monoclonal antibody evidence_span: {"source_cache": "artifacts/glucan-research/15240666.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "eaff7297fa40df19ef82e5e1de433ec0cf34590a7e3fda6aa6061e0922666781", "start_char": 0, "end_char": 1454, "text_sha256": "eaff7297fa40df19ef82e5e1de433ec0cf34590a7e3fda6aa6061e0922666781"} [bg-p15240666] Mechanism by which orally administered beta-1,3-glucans enhance the tumoricidal activity of antitumor monoclonal antibodies in murine tumor models. (2004). https://pubmed.ncbi.nlm.nih.gov/15240666/ DOI: 10.4049/jimmunol.173.2.797
Complete structured claim and evidence
Dectin-1 lacks residues involved in calcium ligation that mediates carbohydrate-binding by classical C-type lectins, and among 187 diverse sequence-defined oligosaccharide probes together with designer microarrays from a neutral soluble glucan from S. cerevisiae, curdlan from Alcaligenes faecalis and pustulan from Umbilicaria papullosa, Dectin-1 binding is detected exclusively to 1,3-linked glucose oligomers, the minimum length required for detectable binding being a 10- or 11-mer, and 11-13 gluco-oligomers in clustered form displayed on liposomes mimic the macromolecular beta-glucans and compete with zymosan binding and triggering of tumour necrosis factor alpha secretion.
Dectin-1 / CLEC7A → Beta-(1->3)-linked gluco-oligosaccharides source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/glucan-research/16371356.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "dd98941694dedd8e3e85766c0c299b54fbc29ca8cce7c61a333efceee796867f", "start_char": 0, "end_char": 1911, "text_sha256": "dd98941694dedd8e3e85766c0c299b54fbc29ca8cce7c61a333efceee796867f"}
experimental_model
Neoglycolipid oligosaccharide microarrays built from three glucan polysaccharides and screened against 187 sequence-defined probes
exposure
Dectin-1 binding to oligosaccharide probes generated from a soluble yeast glucan, curdlan and pustulan
limitations
A binding assignment on arrayed probes rather than on a cell surface. The clustered-ligand test uses liposomes and a Dectin-1-expressing cell line.
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
Recombinant protein and a macrophage cell line
plain_language
The receptor reads only one linkage, needs a run of about ten sugars to grip at all, and needs them clustered to fire.
primary_references
[bg-p16371356] Ligands for the beta-glucan receptor, Dectin-1, assigned using "designer" microarrays of oligosaccharide probes (neoglycolipids) generated from glucan polysaccharides. (2006). https://pubmed.ncbi.nlm.nih.gov/16371356/ DOI: 10.1074/jbc.m511461200
tissue_or_cell_type
Cell-free microarray and cultured cells
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 125–136
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Neoglycolipid oligosaccharide microarrays built from three glucan polysaccharides and screened against 187 sequence-defined probes · source_derived_draft · unverified_draft
### bg-only-beta-1-3-oligomers-bind Dectin-1 lacks residues involved in calcium ligation that mediates carbohydrate-binding by classical C-type lectins, and among 187 diverse sequence-defined oligosaccharide probes together with designer microarrays from a neutral soluble glucan from S. cerevisiae, curdlan from Alcaligenes faecalis and pustulan from Umbilicaria papullosa, Dectin-1 binding is detected exclusively to 1,3-linked glucose oligomers, the minimum length required for detectable binding being a 10- or 11-mer, and 11-13 gluco-oligomers in clustered form displayed on liposomes mimic the macromolecular beta-glucans and compete with zymosan binding and triggering of tumour necrosis factor alpha secretion. 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 receptor reads only one linkage, needs a run of about ten sugars to grip at all, and needs them clustered to fire. organism: Recombinant protein and a macrophage cell line tissue_or_cell_type: Cell-free microarray and cultured cells experimental_model: Neoglycolipid oligosaccharide microarrays built from three glucan polysaccharides and screened against 187 sequence-defined probes limitations: A binding assignment on arrayed probes rather than on a cell surface. The clustered-ligand test uses liposomes and a Dectin-1-expressing cell line. exposure: Dectin-1 binding to oligosaccharide probes generated from a soluble yeast glucan, curdlan and pustulan evidence_span: {"source_cache": "artifacts/glucan-research/16371356.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "dd98941694dedd8e3e85766c0c299b54fbc29ca8cce7c61a333efceee796867f", "start_char": 0, "end_char": 1911, "text_sha256": "dd98941694dedd8e3e85766c0c299b54fbc29ca8cce7c61a333efceee796867f"} [bg-p16371356] Ligands for the beta-glucan receptor, Dectin-1, assigned using "designer" microarrays of oligosaccharide probes (neoglycolipids) generated from glucan polysaccharides. (2006). https://pubmed.ncbi.nlm.nih.gov/16371356/ DOI: 10.1074/jbc.m511461200
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.

Beta-(1->3)-linked gluco-oligosaccharides