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BAYDOUN HASSAN, KATO YUJI, KAMO HIROKI, HÜSCH ANNA, MIZUTA HAYATO, KAWAHARA RYOTA, SIMIZU SIRO. DPY19L3 promotes vasculogenic mimicry by its C-mannosyltransferase activity. Oncol Res 2024; 32:607-614. [PMID: 38560568 PMCID: PMC10972723 DOI: 10.32604/or.2023.030304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 11/24/2023] [Indexed: 04/04/2024] Open
Abstract
C-mannosylation is a post-translational modification that occurs intracellularly in the endoplasmic reticulum. In humans, biosynthesis of C-mannosylation in proteins containing thrombospondin type 1 repeat is catalyzed by the DPY19 family; nonetheless, biological functions of protein C-mannosylation are not yet fully understood, especially in tumor progression. Vasculogenic mimicry (VM) is the formation of fluid-conducting channels by highly invasive and genetically deregulated tumor cells, enabling the tumors to form matrix-embedded vasculogenic structures, containing plasma and blood cells to meet the metabolic demands of rapidly growing tumors. In this study, we focused on DPY19L3, a C-mannosyltransferase, and aimed to unravel its role in VM. Knockout of DPY19L3 inhibited the formation of VM in HT1080 human fibrosarcoma cells. Re-expression of wild-type DPY19L3 recovered VM formation; however, DPY19L3 isoform2, an enzymatic activity-defect mutant, did not restore it, suggesting that the C-mannosyltransferase activity of DPY19L3 is crucial to its function. Furthermore, the knockdown of DPY19L3 in MDA-MB-231 breast cancer cells hindered its network formation ability. Altogether, our findings suggest that DPY19L3 is required for VM formation and stipulate the relevance of C-mannosylation in oncogenesis.
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Affiliation(s)
- HASSAN BAYDOUN
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - YUJI KATO
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - HIROKI KAMO
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - ANNA HÜSCH
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
- Department of Pharmacy and Biochemistry, Faculty of Science, University of Tübingen, Tübingen, 72074, Germany
| | - HAYATO MIZUTA
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - RYOTA KAWAHARA
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - SIRO SIMIZU
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
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Mori K, Sun H, Miura K, Simizu S. Involvement of DPY19L3 in Myogenic Differentiation of C2C12 Myoblasts. Molecules 2021; 26:5685. [PMID: 34577156 DOI: 10.3390/molecules26185685] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 11/16/2022] Open
Abstract
DPY19L3 has been identified as a C-mannosyltransferase for thrombospondin type-1 repeat domain-containing proteins. In this study, we focused on the role of DPY19L3 in the myogenic differentiation of C2C12 mouse myoblast cells. We carried out DPY19L3 gene depletion using the CRISPR/Cas9 system. The result showed that these DPY19L3-knockout cells could not be induced for differentiation. Moreover, the phosphorylation levels of MEK/ERK and p70S6K were suppressed in the DPY19L3-knockout cells compared with that of parent cells, suggesting that the protein(s) that is(are) DPY19L3-mediated C-mannosylated and regulate(s) MEK/ERK or p70S6K signaling is(are) required for the differentiation.
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