Resistance to a secondary infectious challenge: molecular mechanisms & dependencies

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What it does

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Recorded relationships

Where it participates (unsigned role)

Administration of beta-glucan as a prototypical trained-immunity-inducing agonist to mice induced expansion of progenitors of the myeloid lineage which was associated with elevated signalling by innate immune mediators such as IL-1 beta and granulocyte-macrophage colony-stimulating factor and with adaptations in glucose metabolism and cholesterol biosynthesis, and the trained-immunity-related increase in myelopoiesis resulted in a beneficial response to secondary LPS challenge and protection from chemotherapy-induced myelosuppression in mice.
Beta-glucan → Expansion of myeloid-lineage progenitors in the bone marrow source_derived_draftungraded
Experimental context and source evidence
evidence_span
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experimental_model
Administration of beta-glucan to mice with assessment of haematopoietic stem and progenitor cells and two challenge models
exposure
Beta-glucan as a prototypical trained-immunity-inducing agonist, followed by secondary LPS challenge or chemotherapy
limitations
A mouse study with parenteral administration. It shows progenitors are modulated; it does not show that a swallowed glucan reaches human marrow.
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
The change is not only in the cells circulating now; it reaches the factory that makes the next ones.
primary_references
[bg-p29328910] Modulation of Myelopoiesis Progenitors Is an Integral Component of Trained Immunity. (2018). https://pubmed.ncbi.nlm.nih.gov/29328910/ DOI: 10.1016/j.cell.2017.11.034
tissue_or_cell_type
Bone marrow
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 476–487
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Administration of beta-glucan to mice with assessment of haematopoietic stem and progenitor cells and two challenge models · source_derived_draft · unverified_draft
### bg-training-reaches-the-marrow Administration of beta-glucan as a prototypical trained-immunity-inducing agonist to mice induced expansion of progenitors of the myeloid lineage which was associated with elevated signalling by innate immune mediators such as IL-1 beta and granulocyte-macrophage colony-stimulating factor and with adaptations in glucose metabolism and cholesterol biosynthesis, and the trained-immunity-related increase in myelopoiesis resulted in a beneficial response to secondary LPS challenge and protection from chemotherapy-induced myelosuppression in mice. 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 change is not only in the cells circulating now; it reaches the factory that makes the next ones. organism: Mouse tissue_or_cell_type: Bone marrow experimental_model: Administration of beta-glucan to mice with assessment of haematopoietic stem and progenitor cells and two challenge models limitations: A mouse study with parenteral administration. It shows progenitors are modulated; it does not show that a swallowed glucan reaches human marrow. exposure: Beta-glucan as a prototypical trained-immunity-inducing agonist, followed by secondary LPS challenge or chemotherapy evidence_span: {"source_cache": "artifacts/glucan-research/29328910.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "d81bb64ee275e9aef7d9a59be186b5082906172a79c6f0d943832662f226b0d5", "start_char": 0, "end_char": 1023, "text_sha256": "d81bb64ee275e9aef7d9a59be186b5082906172a79c6f0d943832662f226b0d5"} [bg-p29328910] Modulation of Myelopoiesis Progenitors Is an Integral Component of Trained Immunity. (2018). https://pubmed.ncbi.nlm.nih.gov/29328910/ DOI: 10.1016/j.cell.2017.11.034
Complete structured claim and evidence
Mice lacking functional T and B lymphocytes are protected against reinfection with Candida albicans in a monocyte-dependent manner, C. albicans and fungal cell wall beta-glucans induced functional reprogramming of monocytes leading to enhanced cytokine production in vivo and in vitro, the training required the beta-glucan receptor dectin-1 and the noncanonical Raf-1 pathway, and monocyte training by beta-glucans was associated with stable changes in histone trimethylation at H3K4 which suggests the involvement of epigenetic mechanisms.
Beta-glucan → Trained immunity, an altered response to a later challenge after the first has ended source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/glucan-research/22901542.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "75bc4bedb7017f3d94d8f7441862392ddca229ed16f93eb528d3f9df3da66408", "start_char": 0, "end_char": 1067, "text_sha256": "75bc4bedb7017f3d94d8f7441862392ddca229ed16f93eb528d3f9df3da66408"}
experimental_model
Reinfection protection in mice lacking functional T and B lymphocytes, with monocyte reprogramming in vitro and in vivo
exposure
Candida albicans and fungal cell wall beta-glucans as the training stimulus, with the first exposure resolved before rechallenge
limitations
The Raf-1 dependence belongs to this training protocol. It does not establish that every beta-glucan training protocol is independent of the canonical Syk route.
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
Animals with no adaptive immune system at all were still protected the second time, because their monocytes had been rewired.
primary_references
[bg-p22901542] Candida albicans infection affords protection against reinfection via functional reprogramming of monocytes. (2012). https://pubmed.ncbi.nlm.nih.gov/22901542/ DOI: 10.1016/j.chom.2012.06.006
tissue_or_cell_type
Monocyte
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 424–435
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Reinfection protection in mice lacking functional T and B lymphocytes, with monocyte reprogramming in vitro and in vivo · source_derived_draft · unverified_draft
### bg-training-runs-through-raf1 Mice lacking functional T and B lymphocytes are protected against reinfection with Candida albicans in a monocyte-dependent manner, C. albicans and fungal cell wall beta-glucans induced functional reprogramming of monocytes leading to enhanced cytokine production in vivo and in vitro, the training required the beta-glucan receptor dectin-1 and the noncanonical Raf-1 pathway, and monocyte training by beta-glucans was associated with stable changes in histone trimethylation at H3K4 which suggests the involvement of epigenetic mechanisms. 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: Animals with no adaptive immune system at all were still protected the second time, because their monocytes had been rewired. organism: Mouse tissue_or_cell_type: Monocyte experimental_model: Reinfection protection in mice lacking functional T and B lymphocytes, with monocyte reprogramming in vitro and in vivo limitations: The Raf-1 dependence belongs to this training protocol. It does not establish that every beta-glucan training protocol is independent of the canonical Syk route. exposure: Candida albicans and fungal cell wall beta-glucans as the training stimulus, with the first exposure resolved before rechallenge evidence_span: {"source_cache": "artifacts/glucan-research/22901542.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "75bc4bedb7017f3d94d8f7441862392ddca229ed16f93eb528d3f9df3da66408", "start_char": 0, "end_char": 1067, "text_sha256": "75bc4bedb7017f3d94d8f7441862392ddca229ed16f93eb528d3f9df3da66408"} [bg-p22901542] Candida albicans infection affords protection against reinfection via functional reprogramming of monocytes. (2012). https://pubmed.ncbi.nlm.nih.gov/22901542/ DOI: 10.1016/j.chom.2012.06.006
Complete structured claim and evidence

The events it takes part in

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Open hypotheses

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This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.

Resistance to a secondary infectious challenge