Superoxide Dismutase-3 Downregulates Laminin α5 Expression in Tumor Endothelial Cells via the Inhibition of Nuclear Factor Kappa B Signaling.
Authors
Martínez-Rey, Diego
Martín-González, Paula
Franch, Mónica
Mira, Emilia
Publication Date
2022-02-26Journal Title
Cancers (Basel)
ISSN
2072-6694
Publisher
MDPI AG
Volume
14
Issue
5
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Carmona-Rodríguez, L., Martínez-Rey, D., Martín-González, P., Franch, M., Sorokin, L., Mira, E., & Mañes, S. (2022). Superoxide Dismutase-3 Downregulates Laminin α5 Expression in Tumor Endothelial Cells via the Inhibition of Nuclear Factor Kappa B Signaling.. Cancers (Basel), 14 (5) https://doi.org/10.3390/cancers14051226
Abstract
The balance between laminin isoforms containing the α5 or the α4 chain in the endothelial basement membrane determines the site of leukocyte diapedesis under inflammatory conditions. Extracellular superoxide dismutase (SOD3) induces laminin α4 expression in tumor blood vessels, which is associated with enhanced intratumor T cell infiltration in primary human cancers. We show now that SOD3 overexpression in neoplastic and endothelial cells (ECs) reduces laminin α5 in tumor blood vessels. SOD3 represses the laminin α5 gene (LAMA5), but LAMA5 expression is not changed in SOD1-overexpressing cells. Transcriptomic analyses revealed SOD3 overexpression to change the transcription of 1682 genes in ECs, with the canonical and non-canonical NF-κB pathways as the major SOD3 targets. Indeed, SOD3 reduced the transcription of well-known NF-κB target genes as well as NF-κB-driven promoter activity in ECs stimulated with tumor necrosis factor (TNF)-α, an NF-κB signaling inducer. SOD3 inhibited the phosphorylation and degradation of IκBα (nuclear factor of the kappa light polypeptide gene enhancer in B-cells inhibitor alpha), an NF-κB inhibitor. Finally, TNF-α was found to be a transcriptional activator of LAMA5 but not of LAMA4; LAMA5 induction was prevented by SOD3. In conclusion, SOD3 is a major regulator of laminin balance in the basement membrane of tumor ECs, with potential implications for immune cell infiltration into tumors.
Keywords
basement membrane, laminin, immunotherapy, oxidative stress, diapedesis, endothelium, inflammation
Sponsorship
Ministry of Economy, Industry and Competitiveness (SAF2017–83732-R)
Spanish Ministry of Science and Innovation (PID2020-116303RB-I00/MCIN/AEI/10.13039/501100011033)
Comunidad de Madrid (B2017/BMD-3733)
Asociación Española Contra el Cáncer (PRYGN211240MAÑE)
Identifiers
External DOI: https://doi.org/10.3390/cancers14051226
This record's URL: https://www.repository.cam.ac.uk/handle/1810/334591
Rights
Licence:
https://creativecommons.org/licenses/by/4.0/
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