RRC ID 45901
Author Zhang Y, Li W, Li L, Li Y, Fu R, Zhu Y, Li J, Zhou Y, Xiong S, Zhang H.
Title Structural damage in the C. elegans epidermis causes release of STA-2 and induction of an innate immune response.
Journal Immunity
Abstract The epidermis constantly encounters invasions that disrupt its architecture, yet whether the epidermal immune system utilizes damaged structures as danger signals to activate self-defense is unclear. Here, we used a C. elegans epidermis model in which skin-penetrating infection or injury activates immune defense and antimicrobial peptide (AMP) production. By systemically disrupting each architectural component, we found that only disturbance of the apical hemidesmosomes triggered an immune response and robust AMP expression. The epidermis recognized structural damage through hemidesmosomes associated with a STAT-like protein, whose disruption led to detachment of STA-2 molecules from hemidesmosomes and transcription of AMPs. This machinery enabled the epidermis to bypass certain signaling amplification and directly trigger AMP production when subjected to extensive architectural damage. Together, our findings uncover an evolutionarily conserved mechanism for the epithelial barriers to detect danger and activate immune defense.
Volume 42(2)
Pages 309-320
Published 2015-2-17
DOI 10.1016/j.immuni.2015.01.014
PII S1074-7613(15)00040-0
PMID 25692704
MeSH Animals Antimicrobial Cationic Peptides / biosynthesis* Antimicrobial Cationic Peptides / genetics Caenorhabditis elegans / immunology* Caenorhabditis elegans Proteins / immunology Caenorhabditis elegans Proteins / metabolism* Cell Adhesion Molecules / immunology Cells, Cultured Epidermis / immunology* Epidermis / injuries* Hemidesmosomes / immunology Hemidesmosomes / pathology Humans Immunity, Innate Keratinocytes / immunology Keratinocytes / metabolism STAT Transcription Factors / metabolism* Signal Transduction / immunology p38 Mitogen-Activated Protein Kinases / immunology
IF 19.734
Times Cited 9
C.elegans tm1962 tm3036