neuroimmune
Substance P
Sensory neuropeptide that can couple pain, itch, vascular leak, and mast-cell-rich barrier inflammation
Review layer
Last reviewed 2026-07-03
Neuroimmune mediators are modeled as directional teaching nodes for threshold, reflex, sensory, vascular, and tissue-crosstalk behavior. Use as educational systems context, not diagnosis or treatment guidance.
4 review sources
State signature
Systems profile
System effects
Primary mapped axes from existing Atlas data.
Tissue
Organ, barrier, stromal, vascular, or local niche behavior.
Inflammation
Inflammatory alarm, recruitment, mediator release, or tissue-damaging amplification.
Neuroimmune
Nerve, neuropeptide, autonomic, microglial, pain, itch, fatigue, or sickness-behavior coupling.
Local map
Relationship field
Arrows point from the upstream source toward the receiving target. Restraint edges use a bar; association edges stay dashed because they are not causal arrows.
Selected relationship
Sensory-neuron substance P can lower mast-cell activation thresholds and amplify mediator release in neurogenic inflammation models
Read as source increases target activity, recruitment, or threshold crossing.
What this relationship means
Read this as a threshold-lowering edge: Substance P can make Mast Cell more ready to fire in the right tissue context.
Effect of source
Substance P represents the nervous-system signal entering the immune map.
Effect on target
Mast Cell is the receiving immune cell whose activation or mediator release may become easier.
Use with caution
This is mechanism education, not a diagnosis, severity score, or treatment rule.
System effect
Substance P influences Mast Cell; the axes below show which mapped systems carry that relationship.
Inflammation
Inflammatory alarm, recruitment, mediator release, or tissue-damaging amplification.
Tissue
Organ, barrier, stromal, vascular, or local niche behavior.
Metabolism
Energy allocation, glycolysis, mitochondrial strain, lipid signaling, or nutrient-sensitive behavior.
Axes are mapped cues from Atlas data, not clinical predictions.
Evidence context
Curated edge, reviewed endpoints, and mapped external anchors.
Fc epsilon receptor (FCERI) signaling
R-HSA-2454202 - checked 2026-06-28
Graph neighborhood
Direct relationships
Arrow shows upstream source toward receiving target.
Sensory-neuron substance P can lower mast-cell activation thresholds and amplify mediator release in neurogenic inflammation models
Arrow shows upstream source toward receiving target.
Itch and pain fibers can use substance P to couple local neurogenic inflammation with skin barrier reactivity
Mediator interpretation
Effect Of and Effect On
Substance P is modeled as a sensory-neuron output that can lower mast-cell and barrier-tissue thresholds. It helps explain why pain, itch, stress, tissue injury, and inflammation can reinforce each other in local neuroimmune loops.
What this means
Effect of the nervous signal
Read Substance P as a sensory-neuron release signal: pain, itch, irritants, stress, or tissue injury may be feeding the immune threshold, not just responding to it.
Effect on immune and tissue systems
On immune and tissue systems it usually means mast cells, vessels, and barrier tissues may be easier to trigger, amplifying itch, flare, swelling, or local cytokine output.
Use it in Atlas when
Use this node when symptoms look neurogenic and inflammatory at the same time, especially around barrier tissues.
Boundary
This does not prove a mast-cell disorder, migraine mechanism, allergy, or treatment target by itself.
Influence Trace
Nervous signal to immune behavior
What starts the signal?
Pain, itch, irritant exposure, tissue injury, or stress-sensitive sensory-neuron firing.
What receives it?
Mast cells and barrier tissues that carry neuropeptide-sensitive activation thresholds.
What changes in the system?
The local tissue can become easier to flare, itch, leak fluid, or release mast-cell mediators.
What should not be over-interpreted?
Do not read this as proof of allergy, mast-cell disease, migraine mechanism, or a treatment target without clinical context.
- 1Sensory neuron releaseSubstance P
Substance P carries a pain or itch-linked nerve signal into the tissue immune map.
- 2Mast-cell thresholdMast Cell
Mast cells become the receiving amplifier when the local context lowers activation thresholds.
- 3Skin and barrier behaviorSkin Immune Ecosystem
Barrier tissues can show itch, flare, vascular leak, and cytokine amplification.
Effect of
Regulated by
Signals through
Effect on immune cells
Effect on tissues
Nervous-system behavior
tachykinin neuropeptide