title: Characterization of pro-invasive mechanisms and N-terminal cleavage of ANXA1 in melanoma.
abstract: Annexin A1 deregulation is often associated with cancer. Indeed we have shown that annexin A1 is overexpressed in melanoma and promotes metastases by formyl peptide receptor stimulation and MMP2 expression. Here, we demonstrated in different melanoma cell lines that annexin A1-MMP2 induction is mediated by MAPK and STAT3 pathways. To decipher endogenous annexin A1 action mode, we showed that annexin A1 is externalized in A375 cells and cleaved by a membrane-associated serine protease, allowing the release of a pro-invasive annexin A1 peptide in the extra cellular environment. Finally, a biochemical and proteomic approach allowed to enrich eight out of 12 members of the annexin family and to identify an original annexin A1 cleavage site localized between Ser(28) and Lys(29). Altogether, these data identify signaling pathways involved in annexin A1 pro-invasive role and suggest that externalized full-length annexin A1 interacts with formyl peptide receptors in a juxtacrine manner while ANXA 2-28 release allows autocrine and paracrine interaction.
authors.affiliation: Clermont Université, UMR 990, Inserm, Université d'Auvergne, BP10448, 63000, Clermont-Ferrand, France, boudhra.zied@gmail.com.
authors.forename: Z
authors.initials: Z
authors.lastname: Boudhraa
authors.forename: C
authors.initials: C
authors.lastname: Merle
authors.forename: D
authors.initials: D
authors.lastname: Mazzocut
authors.forename: J M
authors.initials: JM
authors.lastname: Chezal
authors.forename: C
authors.initials: C
authors.lastname: Chambon
authors.forename: E
authors.initials: E
authors.lastname: Miot-Noirault
authors.forename: M
authors.initials: M
authors.lastname: Theisen
authors.forename: B
authors.initials: B
authors.lastname: Bouchon
authors.forename: F
authors.initials: F
authors.lastname: Degoul
mesh_terms: D000818:Animals; D017305:Annexin A1 / Q000378:metabolism*; D019898:Autocrine Communication; D045744:Cell Line, Tumor; D002462:Cell Membrane / Q000201:enzymology; D006801:Humans; D008297:Male; D020778:Matrix Metalloproteinase 2 / Q000378:metabolism; D008545:Melanoma / Q000201:enzymology / Q000378:metabolism* / Q000473:pathology; D008819:Mice, Nude; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D009361:Neoplasm Invasiveness; D019899:Paracrine Communication; D010446:Peptide Fragments / Q000378:metabolism*; D017434:Protein Structure, Tertiary; D044042:Receptors, Formyl Peptide / Q000378:metabolism; D050796:STAT3 Transcription Factor / Q000378:metabolism; D057057:Serine Proteases / Q000378:metabolism; D015398:Signal Transduction; D012878:Skin Neoplasms / Q000201:enzymology / Q000378:metabolism* / Q000473:pathology
chemical_list: D017305:Annexin A1; D010446:Peptide Fragments; D044042:Receptors, Formyl Peptide; D050796:STAT3 Transcription Factor; C494086:STAT3 protein, human; D020928:Mitogen-Activated Protein Kinases; D057057:Serine Proteases; C522361:MMP2 protein, human; D020778:Matrix Metalloproteinase 2