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Bruschi M, Biancucci F, Masini S, Piacente F, Ligi D, Bartoccini F, Antonelli A, Mannello F, Bruzzone S, Menotta M, Fraternale A, Magnani M. The influence of redox modulation on hypoxic endothelial cell metabolic and proteomic profiles through a small thiol-based compound tuning glutathione and thioredoxin systems. Biofactors 2023; 49:1205-1222. [PMID: 37409789 DOI: 10.1002/biof.1988] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/16/2023] [Indexed: 07/07/2023]
Abstract
Reduction in oxygen levels is a key feature in the physiology of the bone marrow (BM) niche where hematopoiesis occurs. The BM niche is a highly vascularized tissue and endothelial cells (ECs) support and regulate blood cell formation from hematopoietic stem cells (HSCs). While in vivo studies are limited, ECs when cultured in vitro at low O2 (<5%), fail to support functional HSC maintenance due to oxidative environment. Therefore, changes in EC redox status induced by antioxidant molecules may lead to alterations in the cellular response to hypoxia likely favoring HSC self-renewal. To evaluate the impact of redox regulation, HUVEC, exposed for 1, 6, and 24 h to 3% O2 were treated with N-(N-acetyl-l-cysteinyl)-S-acetylcysteamine (I-152). Metabolomic analyses revealed that I-152 increased glutathione levels and influenced the metabolic profiles interconnected with the glutathione system and the redox couples NAD(P)+/NAD(P)H. mRNA analysis showed a lowered gene expression of HIF-1α and VEGF following I-152 treatment whereas TRX1 and 2 were stimulated. Accordingly, the proteomic study revealed the redox-dependent upregulation of thioredoxin and peroxiredoxins that, together with the glutathione system, are the main regulators of intracellular ROS. Indeed, a time-dependent ROS production under hypoxia and a quenching effect of the molecule were evidenced. At the secretome level, the molecule downregulated IL-6, MCP-1, and PDGF-bb. These results suggest that redox modulation by I-152 reduces oxidative stress and ROS level in hypoxic ECs and may be a strategy to fine-tune the environment of an in vitro BM niche able to support functional HSC maintenance.
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Affiliation(s)
- Michela Bruschi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Federica Biancucci
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Sofia Masini
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Francesco Piacente
- Department of Experimental Medicine, Section of Biochemistry, and CEBR, University of Genoa, Genoa, GE, Italy
| | - Daniela Ligi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Francesca Bartoccini
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Antonella Antonelli
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Ferdinando Mannello
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Santina Bruzzone
- Department of Experimental Medicine, Section of Biochemistry, and CEBR, University of Genoa, Genoa, GE, Italy
- IRCCS, Ospedale Policlinico San Martino, Genoa, GE, Italy
| | - Michele Menotta
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Alessandra Fraternale
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Mauro Magnani
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
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