RRC ID 46632
Author Lee KZ, Kniazeva M, Han M, Pujol N, Ewbank JJ.
Title The fatty acid synthase fasn-1 acts upstream of WNK and Ste20/GCK-VI kinases to modulate antimicrobial peptide expression in C. elegans epidermis.
Journal Virulence
Abstract An important part of the innate immune response of the nematode C. elegans to fungal infection is the rapid induction of antimicrobial peptide gene expression. One of these genes, nlp‑29, is expressed at a low level in adults under normal conditions. Its expression is up-regulated in the epidermis by infection with Drechmeria coniospora, but also by physical injury and by osmotic stress. For infection and wounding, the induction is dependent on a p38 MAP kinase cascade, but for osmotic stress, this pathway is not required. To characterize further the pathways that control the expression of nlp‑29, we carried out a genetic screen for negative regulatory genes. We isolated a number of Peni (peptide expression no infection) mutants and cloned one. It corresponds to fasn‑1, the nematode ortholog of vertebrate fatty acid synthase. We show here that a pathway involving fatty acid synthesis and the evolutionary conserved wnk‑1 and gck‑3/Ste20/GCK‑VI kinases modulates nlp‑29 expression in the C. elegans epidermis, independently of p38 MAPK signaling. The control of the antimicrobial peptide gene nlp‑29 thus links different physiological processes, including fatty acid metabolism, osmoregulation, maintenance of epidermal integrity and the innate immune response to infection.
Volume 1(3)
Pages 113-22
Published 2010-1-1
DOI 10.4161/viru.1.3.10974
PII 10974
PMID 21178429
PMC PMC3073241
MeSH Animals Antimicrobial Cationic Peptides / genetics Antimicrobial Cationic Peptides / immunology Antimicrobial Cationic Peptides / metabolism* Caenorhabditis elegans / enzymology* Caenorhabditis elegans / genetics Caenorhabditis elegans / metabolism Caenorhabditis elegans Proteins / genetics Caenorhabditis elegans Proteins / metabolism Epidermis / immunology* Epidermis / metabolism Fatty Acid Synthases / genetics Fatty Acid Synthases / metabolism* Gene Expression Regulation* Homeostasis Immunity, Innate Protein Serine-Threonine Kinases / genetics Protein Serine-Threonine Kinases / metabolism Signal Transduction WNK Lysine-Deficient Protein Kinase 1 Water-Electrolyte Balance p38 Mitogen-Activated Protein Kinases
IF 5.542
Times Cited 29
C.elegans tm3036 tm3581