Atlas One · Host Biology · Scale 05 — Tissue

Fibrosis

Pathological ECM accumulation (collagen I/III) replacing functional parenchyma. Driven by TGF-β1/SMAD3: injury → macrophage/epithelial TGF-β → myofibroblast activation → collagen deposition. Affects liver, lung, kidney, heart, skin.

Also known as: fibrosis, tissue fibrosis, myofibroblast activation, pulmonary fibrosis, hepatic fibrosis, renal fibrosis

Scale 05 — TissueScale
draftStatus
2026-06-06Last Reviewed
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fibrosis

Fibrosis

Pathological ECM accumulation (collagen I/III) replacing functional parenchyma. Driven by TGF-β1/SMAD3: injury → macrophage/epithelial TGF-β → myofibroblast activation → collagen deposition. Affects liver, lung, kidney, heart, skin.