Amphiregulin (AREG)

Class growth factor / EGFR ligandReceptor Receptor tyrosine kinase: EGFR / ERBB1

Function

Amphiregulin is a peptide signaling hormone involved in epithelial growth, tissue repair, immune communication, inflammatory adaptation, and regulation of cellular proliferation. As a member of the epidermal growth factor family, amphiregulin functions through signaling systems that coordinate tissue regeneration and adaptive cellular responses.

The hormone contributes to epithelial maintenance, wound healing, mucosal repair, connective tissue remodeling, and communication between immune cells and epithelial structures. Amphiregulin also participates in regulation of stem-cell environments, inflammatory adaptation, and tissue survival pathways. Through these actions, it supports coordinated tissue regeneration and local endocrine communication during physiological stress and repair processes.

Production

Amphiregulin is produced by epithelial cells, macrophages, T lymphocytes, fibroblasts, smooth muscle cells, and additional tissues involved in inflammatory or regenerative adaptation. The hormone is synthesized as a membrane-associated precursor protein that undergoes proteolytic cleavage to release the active signaling peptide.

Production increases during tissue injury, inflammatory activation, immune-cell signaling, mechanical stress, and epithelial repair processes. Local tissue synthesis allows highly targeted communication between neighboring cellular environments.

Regulation

Amphiregulin production is regulated by inflammatory cytokines, growth factor signaling pathways, immune-cell activation, mechanical stress, oxidative signaling, and tissue remodeling processes. Epidermal growth factor receptor-associated pathways also contribute to feedback regulation of expression dynamics.

The hormone acts through epidermal growth factor receptor systems linked to MAP kinase signaling, phosphoinositide signaling cascades, and transcriptional pathways involved in proliferation and tissue repair. Receptor activation supports epithelial regeneration, cellular survival, extracellular matrix adaptation, and inflammatory tissue remodeling. Through these integrated growth and immune signaling systems, amphiregulin coordinates tissue repair, epithelial communication, inflammatory adaptation, and regenerative cellular signaling.

Identity & Secretion

Primary Source GlandEpithelial tissues, immune cells, stromal cells, tumor cells, macrophages, keratinocytes

Secretion PatternParacrine and autocrine local growth-factor signaling

Half-life2 min

PrecursorAREG proprotein

Nutrient Requirements

Nutrient Precursors

amino acids, protein synthesis substrates

Required Vitamins

vitamin-c,vitamin-b6,vitamin-b9,vitamin-a

Required Minerals

zinc,magnesium,selenium

Key Foods

broccoli,kale,spinach,garlic,yellow-onion,blueberry,pomegranate,green-tea-brewed,turmeric-ground,shiitake-raw

Targets & Signaling

Target Tissues

Colon, lung, breast, pancreas, ovary, stomach, liver, skin, immune microenvironment, tumor stroma

Feedback Loops

Amphiregulin activates EGFR signaling with feedback through ERK, AKT, STAT3, EGFR internalization, inflammatory cytokines, wound-repair signaling, and tumor-stromal communication.

Second Messengers

RAS,RAF,MEK,ERK,PI3K,AKT,STAT3,NF-kB,PLC-gamma

Pathways Involved

egfr-signaling,mapk-erk-pathway,pi3k-akt-pathway,jak-stat-pathway,nfkb-pathway,emt-signaling,angiogenesis-vegf-signaling,cell-cycle-control

Key Functions

EGFR activation, epithelial repair, proliferation signaling, migration signaling, tissue remodeling, inflammatory signaling, tumor microenvironment communication.

Plant-Based Focus

Whole-food plant-based patterns rich in cruciferous vegetables, allium vegetables, berries, mushrooms, green tea, turmeric, legumes, and high-fiber foods provide phytochemicals studied for modulation of EGFR, MAPK/ERK, PI3K/AKT, STAT3, NF-kB, and inflammatory signaling.

Clinical Context

Normal RangeLocal tissue expression; not commonly measured as a routine circulating hormone

Unitscontext-dependent

Assay Notes
Amphiregulin is usually evaluated through tissue expression, RNA expression, immunohistochemistry, tumor profiling, or pathway analysis rather than routine blood testing.

Linked Knowledge

Phytochemicals

quercetin,egcg,curcumin,sulforaphane,apigenin,luteolin,kaempferol,resveratrol,allicin

Amino Acids

glutamine,glycine,cysteine,arginine,serine

Foods

broccoli,kale,spinach,garlic,yellow-onion,blueberry,pomegranate,green-tea-brewed,turmeric-ground,shiitake-raw

Vitamins

vitamin-c,vitamin-b6,vitamin-b9,vitamin-a,vitamin-e

Minerals

zinc,magnesium,selenium,copper,manganese

Cancers (context)

Colorectal Cancer,Breast Cancer,Lung Cancer,Pancreatic Cancer,Ovarian Cancer,Gastric Cancer,Liver Cancer,Head and Neck Cancer,Skin Cancer

Ailments

Chronic Inflammation,Oxidative Stress,Endothelial Dysfunction,Intestinal Permeability,Slow Wound Healing

Dietary Modulators

Cruciferous vegetables, allium vegetables, berries, green tea, turmeric, mushrooms, legumes, whole grains, and high-fiber plant foods

Inhibitors / Activators

Inhibitors

quercetin,egcg,curcumin,sulforaphane,luteolin,apigenin,resveratrol

Activators

EGFR expression, epithelial injury, inflammatory cytokines, wound repair signaling, stromal activation, tumor microenvironment signaling

Summary

Amphiregulin is a local EGFR ligand that supports epithelial repair under normal conditions, but in cancer biology excess amphiregulin signaling can drive proliferation, survival, migration, inflammatory signaling, and tumor-stromal communication.

SUMMARY OF EFFECTS ON THE BODY

Amphiregulin supports epithelial repair and tissue remodeling, while dysregulated amphiregulin/EGFR signaling is linked with abnormal proliferation, inflammatory signaling, EMT-like behavior, angiogenesis support, and epithelial tumor progression.

Research

Amphiregulin is a major EGFR ligand with important roles in epithelial repair, inflammation, tumor microenvironment signaling, and cancer progression. It activates EGFR/ERBB1 and downstream MAPK/ERK, PI3K/AKT, STAT3, NF-kB, and EMT-related pathways. Amphiregulin autocrine and paracrine signaling has been studied in colorectal, breast, lung, pancreatic, ovarian, gastric, and liver cancer biology.