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- W2504209761 abstract "The proprotein convertases (PCSKs) are involved in the proteolytic maturation/activation of a wide range of protein precursors involved in neoplasia such as adhesion molecules, growth factors, growth factor receptors, and metalloproteinases. Expression analysis of all the PCSKs family members, namely PC1, PC2, furin, PC4, PC5, PACE4, and PC7 in various human and murine melanoma cells revealed increased PCSK6/PAECE4 expression while compared to melanocytes. The use of in vitro digestion assays and cell transfection experiments revealed that targeting the PCSK6/PAECE4 in melanoma cells using small interfering RNA (siRNA) reduced PCSKs activity and repressed the processing the PCSKs substrates proIGF-1R, pro-VEGF-C and proPDGF-A. Theses unprocessed substrates failed to mediate their signaling pathways that associated reduced cell proliferation. Furthermore, PCSK6/PAECE4 gene silencing reduced melanoma cells migration and invasion that paralleled decreased gelatinase MMP-2 and MMP-9 activity and altered expression and secretion of tissue inhibitor of metalloproteinase-1 (TIMP-1) and TIMP-2, urokinase-type plasminogen activator receptor (uPAR) and plasminogen activator inhibitor-1 (PAI-1). Taken together, these findings highlight the importance of PCSK6/PAECE4 activity in melanoma cells and suggest PCSK6/PAECE4 inhibition as a potentially promising strategy for the prevention of melanoma invasiveness. Citation Format: Geraldine Siegfried, Apolline Imbard, Serge Evrard, Abdel-Majid Khatib. Targeting the proprotein convertase PCSK6/PAECE4 abrogates human melanoma malignant phenotype. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 696." @default.
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- W2504209761 date "2016-07-15" @default.
- W2504209761 modified "2023-09-27" @default.
- W2504209761 title "Abstract 696: Targeting the proprotein convertase PCSK6/PAECE4 abrogates human melanoma malignant phenotype" @default.
- W2504209761 doi "https://doi.org/10.1158/1538-7445.am2016-696" @default.
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