IMMUNE OSby Allerim

cytokine

IL-6

Inflammatory integrator linking acute phase response, fever, TH17 skewing, and metabolic stress

acute phaseTH17metabolismfever

Review layer

Last reviewed 2026-05-17

conceptualeducational

Systems teaching draft. Content is structured for education and graph expansion, with formal source tagging ready for the next review pass.

State signature

Systems profile

Inflammation86
Tolerance45
Metabolism82
Tissue62
Neuroimmune80
Chronicity48

Cascade viewer

Source → signal → tissue behavior

Sources

macrophages
mast cells
endothelium
fibroblasts

Signal

IL-6

Targets and effects

liver
T cells
B cells
CRP induction
fever
related: IL-1betarelated: IL-17related: TGF-beta

Graph neighborhood

Direct relationships

Full graph

Acute phase and systemic inflammatory signaling

Neutrophilassociated withIL-6

Neutrophil-rich inflammation often co-travels with IL-6 tone

IL-6 drives hepatic acute phase response

IL-6, cortisol rhythm, thyroid context, and metabolic stress interact in systemic inflammatory states

Cytokine ecology

Signal Role

IL-6 bridges innate inflammation, hepatic acute phase signaling, fatigue biology, and adaptive T cell differentiation.

Pathway

IL-6Rgp130JAK/STAT3trans-signaling

Source Cells

macrophagesmast cellsendotheliumfibroblastsadipocytes

Target Cells

liverT cellsB cellshypothalamic circuitsmuscle

Inflammatory Role

Raises systemic inflammatory tone and supports acute phase proteins and TH17 conditions.

Regulatory Role

Can support tissue repair and B cell maturation when tightly time-limited.

Tissue Effects

CRP inductionfevervascular activationfatigue and sickness behavior

Metabolic Effects

insulin resistance contextmuscle catabolism in chronic statesenergy mobilization

Nervous System Interactions

sickness behaviorHPA-axis interactionfever circuitry

Related Loops

IL-1beta/TNF-alpha -> IL-6IL-6 + TGF-beta -> TH17 skew