Heat shock protein 27: 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)

Heat shock protein 32 expression increased significantly and peaked 12 hours after exposure, while heat shock proteins 27, 70 and 90 showed only slight and non-significant increases.
Hyperbaric oxygen therapy → Heat shock protein 32 / heme oxygenase-1 in the rat spinal-neuron study source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/hbot-research/24465817.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "e79c9e686d7b5cab274a5bf6e25c188c42e44646fef7f478c53a12831de8e70f", "start_char": 0, "end_char": 1501, "text_sha256": "e79c9e686d7b5cab274a5bf6e25c188c42e44646fef7f478c53a12831de8e70f"}
experimental_model
Primary rat spinal neurons after hyperbaric oxygen preconditioning with heat shock protein inhibitors
exposure
A single hyperbaric oxygen exposure before hydrogen peroxide or oxygen-glucose deprivation
limitations
A preconditioning experiment in cultured neurons. Heat shock protein 32 is heme oxygenase-1 under another name, which is why the inhibitor used is a porphyrin.
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
Rat
plain_language
One heat shock protein responded strongly and the others barely moved.
primary_references
[hbot-p24465817] Hyperbaric oxygen preconditioning induces tolerance against oxidative injury and oxygen-glucose deprivation by up-regulating heat shock protein 32 in rat spinal neurons. (2014). https://pubmed.ncbi.nlm.nih.gov/24465817/ DOI: 10.1371/journal.pone.0085967
tissue_or_cell_type
Primary spinal neurons
Hyperbaric oxygen: the exposure, its reactive species, the signals they carry, and the nutrient-dependent enzymes that handle them (2026-09-19) · lines 348–359
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Primary rat spinal neurons after hyperbaric oxygen preconditioning with heat shock protein inhibitors · source_derived_draft · unverified_draft
### hbot-hsp32-induction Heat shock protein 32 expression increased significantly and peaked 12 hours after exposure, while heat shock proteins 27, 70 and 90 showed only slight and non-significant increases. 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: One heat shock protein responded strongly and the others barely moved. organism: Rat tissue_or_cell_type: Primary spinal neurons experimental_model: Primary rat spinal neurons after hyperbaric oxygen preconditioning with heat shock protein inhibitors limitations: A preconditioning experiment in cultured neurons. Heat shock protein 32 is heme oxygenase-1 under another name, which is why the inhibitor used is a porphyrin. exposure: A single hyperbaric oxygen exposure before hydrogen peroxide or oxygen-glucose deprivation evidence_span: {"source_cache": "artifacts/hbot-research/24465817.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "e79c9e686d7b5cab274a5bf6e25c188c42e44646fef7f478c53a12831de8e70f", "start_char": 0, "end_char": 1501, "text_sha256": "e79c9e686d7b5cab274a5bf6e25c188c42e44646fef7f478c53a12831de8e70f"} [hbot-p24465817] Hyperbaric oxygen preconditioning induces tolerance against oxidative injury and oxygen-glucose deprivation by up-regulating heat shock protein 32 in rat spinal neurons. (2014). https://pubmed.ncbi.nlm.nih.gov/24465817/ DOI: 10.1371/journal.pone.0085967
Complete structured claim and evidence
Post-exercise mTORC1 signalling measured as rps6 phosphorylation was blunted at 1 and 48 hours after training, basal FOXO1 protein content increased 1.3-fold, and training-induced increases in heat shock protein 27 were attenuated with reduced total heat shock protein 72.
Cold water immersion → Ribosomal protein S6 phosphorylation source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/cold-research/31513450.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "f39d3b6bef4879805e7aab7b14df67921ac12765af5d4466836936039ad7a872", "start_char": 0, "end_char": 2195, "text_sha256": "f39d3b6bef4879805e7aab7b14df67921ac12765af5d4466836936039ad7a872"}
experimental_model
Sixteen men completing seven weeks of whole-body resistance training with immersion or passive recovery
exposure
15 minutes at 10 degrees C after each session, three days a week for seven weeks
limitations
A second training study with molecular endpoints. It reproduces the fibre-size result but not the strength result, which is the disagreement recorded in this collection.
nutrient_topic
Cold water immersion research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake. · Cold water immersion
organism
Human
plain_language
The building signal was turned down, the breakdown marker went up, and the muscle stress proteins did not accumulate.
primary_references
[cold-p31513450] Cold water immersion attenuates anabolic signaling and skeletal muscle fiber hypertrophy, but not strength gain, following whole-body resistance training. (2019). https://pubmed.ncbi.nlm.nih.gov/31513450/ DOI: 10.1152/japplphysiol.00127.2019
tissue_or_cell_type
Skeletal muscle
Cold water immersion: cold sensing, heat production, the catecholamine axis and what repeated exposure changes (2026-09-19) · lines 845–856
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Sixteen men completing seven weeks of whole-body resistance training with immersion or passive recovery · source_derived_draft · unverified_draft
### cold-cwi-anabolic-catabolic Post-exercise mTORC1 signalling measured as rps6 phosphorylation was blunted at 1 and 48 hours after training, basal FOXO1 protein content increased 1.3-fold, and training-induced increases in heat shock protein 27 were attenuated with reduced total heat shock protein 72. Condition category: normal nutrient_topic: Cold water immersion research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake. plain_language: The building signal was turned down, the breakdown marker went up, and the muscle stress proteins did not accumulate. organism: Human tissue_or_cell_type: Skeletal muscle experimental_model: Sixteen men completing seven weeks of whole-body resistance training with immersion or passive recovery limitations: A second training study with molecular endpoints. It reproduces the fibre-size result but not the strength result, which is the disagreement recorded in this collection. exposure: 15 minutes at 10 degrees C after each session, three days a week for seven weeks evidence_span: {"source_cache": "artifacts/cold-research/31513450.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "f39d3b6bef4879805e7aab7b14df67921ac12765af5d4466836936039ad7a872", "start_char": 0, "end_char": 2195, "text_sha256": "f39d3b6bef4879805e7aab7b14df67921ac12765af5d4466836936039ad7a872"} [cold-p31513450] Cold water immersion attenuates anabolic signaling and skeletal muscle fiber hypertrophy, but not strength gain, following whole-body resistance training. (2019). https://pubmed.ncbi.nlm.nih.gov/31513450/ DOI: 10.1152/japplphysiol.00127.2019
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.

Heat shock protein 27