Resiniferatoxin, a high-potency TRPV1 agonist: molecular mechanisms & dependencies

How nutrients influence it

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What it does

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Recorded relationships

Where it participates (unsigned role)

Capsaicin reversibly and concentration-dependently reduced the peak amplitude of the compound action potential, the TRPV1 antagonist capsazepine did not affect this activity, and the powerful TRPV1 agonist resiniferatoxin had no effect on compound action potentials, indicating no involvement of TRPV1 channels; capsaicin analogs and other vanilloids inhibited them in the same concentration-dependent way.
Dihydrocapsaicin → Fast-conducting compound action potential in peripheral nerve source_derived_draftungraded
Experimental context and source evidence
evidence_span
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experimental_model
Compound action potentials recorded from frog sciatic nerve fibres by the air-gap method
exposure
Capsaicin, dihydrocapsaicin, capsiate, eugenol, guaiacol, zingerone, vanillin, vanillylamine, vanillic acid, olvanil and curcumin, against procaine
limitations
An isolated nerve preparation with a clean negative control for the receptor: capsazepine did not block the effect and resiniferatoxin, a more powerful TRPV1 agonist, had none. That makes this a non-TRPV1 action of both compounds.
nutrient_topic
Dihydrocapsaicin research collection; topical membership is not evidence of a direct clinical effect, and dihydrocapsaicin is recorded separately from capsaicin. · Dihydrocapsaicin
organism
Frog
plain_language
This block is not the famous receptor at work: blocking the receptor does not stop it, and a stronger agonist does not cause it.
primary_references
[dhc-p23352977] Inhibition by capsaicin and its related vanilloids of compound action potentials in frog sciatic nerves. (2013). https://pubmed.ncbi.nlm.nih.gov/23352977/ DOI: 10.1016/j.lfs.2013.01.011
tissue_or_cell_type
Sciatic nerve
Dihydrocapsaicin: the second capsaicinoid, the hypothermia it is used to induce, what the gut and liver do to it, and what it does without TRPV1 (2026-09-21) · lines 127–138
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Compound action potentials recorded from frog sciatic nerve fibres by the air-gap method · source_derived_draft · unverified_draft
### dhc-conduction-block-not-trpv1 Capsaicin reversibly and concentration-dependently reduced the peak amplitude of the compound action potential, the TRPV1 antagonist capsazepine did not affect this activity, and the powerful TRPV1 agonist resiniferatoxin had no effect on compound action potentials, indicating no involvement of TRPV1 channels; capsaicin analogs and other vanilloids inhibited them in the same concentration-dependent way. Condition category: normal nutrient_topic: Dihydrocapsaicin research collection; topical membership is not evidence of a direct clinical effect, and dihydrocapsaicin is recorded separately from capsaicin. plain_language: This block is not the famous receptor at work: blocking the receptor does not stop it, and a stronger agonist does not cause it. organism: Frog tissue_or_cell_type: Sciatic nerve experimental_model: Compound action potentials recorded from frog sciatic nerve fibres by the air-gap method limitations: An isolated nerve preparation with a clean negative control for the receptor: capsazepine did not block the effect and resiniferatoxin, a more powerful TRPV1 agonist, had none. That makes this a non-TRPV1 action of both compounds. exposure: Capsaicin, dihydrocapsaicin, capsiate, eugenol, guaiacol, zingerone, vanillin, vanillylamine, vanillic acid, olvanil and curcumin, against procaine evidence_span: {"source_cache": "artifacts/dihydrocapsaicin-research/23352977.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "8a2b1f1a1bde0cfc3d08340f1951d88fb3711df6a40634a8c4c7bac63f8384bb", "start_char": 0, "end_char": 1707, "text_sha256": "8a2b1f1a1bde0cfc3d08340f1951d88fb3711df6a40634a8c4c7bac63f8384bb"} [dhc-p23352977] Inhibition by capsaicin and its related vanilloids of compound action potentials in frog sciatic nerves. (2013). https://pubmed.ncbi.nlm.nih.gov/23352977/ DOI: 10.1016/j.lfs.2013.01.011
Complete structured claim and evidence
Bilateral cervical or subdiaphragmatic vagotomy attenuated the decreases in brown adipose tissue sympathetic nerve activity and thermogenesis evoked by nanoinjection of resiniferatoxin into the nucleus tractus solitarius but did not prevent the decreases evoked by intravenous dihydrocapsaicin, consistent with a non-vagal pathway through which systemic TRPV1 agonists can inhibit brown adipose tissue thermogenesis.
Vagal afferent activity → Brown adipose tissue thermogenesis source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/dihydrocapsaicin-research/29590555.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "947ba9408e8bbaecee08ba0b2018014faa1d26d3c1fdf8df063e92911e53e19a", "start_char": 0, "end_char": 1882, "text_sha256": "947ba9408e8bbaecee08ba0b2018014faa1d26d3c1fdf8df063e92911e53e19a"}
experimental_model
Urethane-chloralose-anaesthetised rats with nucleus tractus solitarius nanoinjection, sympathetic nerve recording and vagotomy
exposure
Intravenous dihydrocapsaicin, against resiniferatoxin nanoinjected into the nucleus tractus solitarius, with capsazepine and bilateral cervical or subdiaphragmatic vagotomy
limitations
The vagotomy control separates a central vagal route from whatever systemic dihydrocapsaicin uses. Anaesthetised animals, so the cardiovascular numbers are not directly comparable with the conscious studies here.
nutrient_topic
Dihydrocapsaicin research collection; topical membership is not evidence of a direct clinical effect, and dihydrocapsaicin is recorded separately from capsaicin. · Dihydrocapsaicin
organism
Rat
plain_language
Cutting the vagus nerve stopped the brain-injected agonist working but not the injected one, so they reach the heater by different roads.
primary_references
[dhc-p29590555] Activation of TRPV1 in nucleus tractus solitarius reduces brown adipose tissue thermogenesis, arterial pressure, and heart rate. (2018). https://pubmed.ncbi.nlm.nih.gov/29590555/ DOI: 10.1152/ajpregu.00049.2018
tissue_or_cell_type
Nucleus tractus solitarius and brown adipose tissue
Dihydrocapsaicin: the second capsaicinoid, the hypothermia it is used to induce, what the gut and liver do to it, and what it does without TRPV1 (2026-09-21) · lines 413–424
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Urethane-chloralose-anaesthetised rats with nucleus tractus solitarius nanoinjection, sympathetic nerve recording and vagotomy · source_derived_draft · unverified_draft
### dhc-not-a-vagal-route Bilateral cervical or subdiaphragmatic vagotomy attenuated the decreases in brown adipose tissue sympathetic nerve activity and thermogenesis evoked by nanoinjection of resiniferatoxin into the nucleus tractus solitarius but did not prevent the decreases evoked by intravenous dihydrocapsaicin, consistent with a non-vagal pathway through which systemic TRPV1 agonists can inhibit brown adipose tissue thermogenesis. Condition category: normal nutrient_topic: Dihydrocapsaicin research collection; topical membership is not evidence of a direct clinical effect, and dihydrocapsaicin is recorded separately from capsaicin. plain_language: Cutting the vagus nerve stopped the brain-injected agonist working but not the injected one, so they reach the heater by different roads. organism: Rat tissue_or_cell_type: Nucleus tractus solitarius and brown adipose tissue experimental_model: Urethane-chloralose-anaesthetised rats with nucleus tractus solitarius nanoinjection, sympathetic nerve recording and vagotomy limitations: The vagotomy control separates a central vagal route from whatever systemic dihydrocapsaicin uses. Anaesthetised animals, so the cardiovascular numbers are not directly comparable with the conscious studies here. exposure: Intravenous dihydrocapsaicin, against resiniferatoxin nanoinjected into the nucleus tractus solitarius, with capsazepine and bilateral cervical or subdiaphragmatic vagotomy evidence_span: {"source_cache": "artifacts/dihydrocapsaicin-research/29590555.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "947ba9408e8bbaecee08ba0b2018014faa1d26d3c1fdf8df063e92911e53e19a", "start_char": 0, "end_char": 1882, "text_sha256": "947ba9408e8bbaecee08ba0b2018014faa1d26d3c1fdf8df063e92911e53e19a"} [dhc-p29590555] Activation of TRPV1 in nucleus tractus solitarius reduces brown adipose tissue thermogenesis, arterial pressure, and heart rate. (2018). https://pubmed.ncbi.nlm.nih.gov/29590555/ DOI: 10.1152/ajpregu.00049.2018
Complete structured claim and evidence

The events it takes part in

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Situations it appears in

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In the sources

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Open hypotheses

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Resiniferatoxin, a high-potency TRPV1 agonist