Back to Search
Start Over
Immuno-targeting the ectopic phosphorylation sites of PDGFRA generated by MAN2A1-FER fusion in HCC.
- Source :
-
Hepatology communications [Hepatol Commun] 2024 Jul 31; Vol. 8 (8). Date of Electronic Publication: 2024 Jul 31 (Print Publication: 2024). - Publication Year :
- 2024
-
Abstract
- Background: HCC is one of the most lethal cancers for humans. Mannosidase alpha class 2A member 1 (MAN2A1)-FER is one of the most frequent oncogenic fusion genes in HCC. In this report, we showed that MAN2A1-FER ectopically phosphorylated the extracellular domains of PDGFRA, MET, AXL, and N-cadherin. The ectopic phosphorylation of these transmembrane proteins led to the activation of their kinase activities and initiated the activation cascades of their downstream signaling molecules.<br />Methods: A panel of mouse monoclonal antibodies was developed to recognize the ectopic phosphorylation sites of PDGFRA.<br />Results and Conclusions: The analyses showed that these antibodies bound to the specific phosphotyrosine epitopes in the extracellular domain of PDGFRA with high affinity and specificity. The treatment of MAN2A1-FER-positive cancer HUH7 with one of the antibodies called 2-3B-G8 led to the deactivation of cell growth signaling pathways and cell growth arrest while having minimal impact on HUH7ko cells where MAN2A1-FER expression was disrupted. The treatment of 2-3B-G8 antibody also led to a large number of cell deaths of MAN2A1-FER-positive cancer cells such as HUH7, HEPG2, SNU449, etc., while the same treatment had no impact on HUH7ko cells. When severe combined immunodeficiency mice xenografted with HEPG2 or HUH7 were treated with monomethyl auristatin E-conjugated 2-3B-G8 antibody, it slowed the progression of tumor growth, eliminated the metastasis, and reduced the mortality, in comparison with the controls. Targeting the cancer-specific ectopic phosphorylation sites of PDGFRA induced by MAN2A1-FER may hold promise as an effective treatment for liver cancer.<br /> (Copyright © 2024 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Association for the Study of Liver Diseases.)
- Subjects :
- Animals
Humans
Phosphorylation
Mice
Cell Line, Tumor
Antibodies, Monoclonal therapeutic use
Antibodies, Monoclonal pharmacology
Oncogene Proteins, Fusion genetics
Signal Transduction
Liver Neoplasms genetics
Liver Neoplasms immunology
Liver Neoplasms drug therapy
Liver Neoplasms pathology
Carcinoma, Hepatocellular genetics
Carcinoma, Hepatocellular immunology
Carcinoma, Hepatocellular pathology
Carcinoma, Hepatocellular drug therapy
Receptor, Platelet-Derived Growth Factor alpha genetics
Subjects
Details
- Language :
- English
- ISSN :
- 2471-254X
- Volume :
- 8
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Hepatology communications
- Publication Type :
- Academic Journal
- Accession number :
- 39082961
- Full Text :
- https://doi.org/10.1097/HC9.0000000000000511