Abstract
Reactive oxygen species (ROS) contribute to the pathogenesis of cardiovascular disease, including hypertension, atherosclerosis, cardiac hypertrophy, heart failure and restenosis. Thiol proteins and thiol oxidoreductases are key players in cell signaling, and their altered expression and/or activity has been associated with a disrupture in cardiac and vascular homeostasis. Protein disulfide isomerase (PDI) is a thiol oxidoreductase member of the thioredoxin family that has multiple roles in cellular function. Originally discovered in the endoplasmic reticulum (ER), PDI is essential for protein folding. However, it can also be found in the cytosol and closely associated with the surface of platelets, smooth muscle cells, neutrophils and endothelial cells. On the cell surface, PDI is imperative for platelet aggregation and transnitrosation, which are related to thrombosis and control of vascular tone by nitric oxide, respectively. Furthermore, PDI signaling contributes to redox-dependent events such as smooth muscle cell migration induced by PDGF and TNFα-dependent angiogenesis. Studies from our group have shown that intracellular PDI regulates the expression and activity of the NADPH oxidase family of proteins (Nox), which are enzymes dedicated to ROS generation. PDI acts as a new organizer of leukocyte Nox2 by redox dependently associating with p47phox and controlling its recruitment to the plasma membrane, an essential step for assembly of the active enzyme. Such multiple effects of PDI suggest that specific targeting of this oxidoreductase could represent a new approach in the treatment of vascular disease. In this review, we present a novel role for PDI as an adaptor protein involved in redox processes and Nox signaling and propose PDI as a potential therapeutic target in the treatment of atherosclerosis, thrombosis and hypertension.
Keywords: Thiols, thioredoxin, protein disulfide isomerase, NADPH oxidases, redox signaling, vascular disease.
Current Pharmaceutical Design
Title:Protein disulfide isomerase and Nox: new partners in redox signaling
Volume: 21 Issue: 41
Author(s): Silvia Cellone Trevelin and Lucia Rossetti Lopes
Affiliation:
Keywords: Thiols, thioredoxin, protein disulfide isomerase, NADPH oxidases, redox signaling, vascular disease.
Abstract: Reactive oxygen species (ROS) contribute to the pathogenesis of cardiovascular disease, including hypertension, atherosclerosis, cardiac hypertrophy, heart failure and restenosis. Thiol proteins and thiol oxidoreductases are key players in cell signaling, and their altered expression and/or activity has been associated with a disrupture in cardiac and vascular homeostasis. Protein disulfide isomerase (PDI) is a thiol oxidoreductase member of the thioredoxin family that has multiple roles in cellular function. Originally discovered in the endoplasmic reticulum (ER), PDI is essential for protein folding. However, it can also be found in the cytosol and closely associated with the surface of platelets, smooth muscle cells, neutrophils and endothelial cells. On the cell surface, PDI is imperative for platelet aggregation and transnitrosation, which are related to thrombosis and control of vascular tone by nitric oxide, respectively. Furthermore, PDI signaling contributes to redox-dependent events such as smooth muscle cell migration induced by PDGF and TNFα-dependent angiogenesis. Studies from our group have shown that intracellular PDI regulates the expression and activity of the NADPH oxidase family of proteins (Nox), which are enzymes dedicated to ROS generation. PDI acts as a new organizer of leukocyte Nox2 by redox dependently associating with p47phox and controlling its recruitment to the plasma membrane, an essential step for assembly of the active enzyme. Such multiple effects of PDI suggest that specific targeting of this oxidoreductase could represent a new approach in the treatment of vascular disease. In this review, we present a novel role for PDI as an adaptor protein involved in redox processes and Nox signaling and propose PDI as a potential therapeutic target in the treatment of atherosclerosis, thrombosis and hypertension.
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Cite this article as:
Trevelin Cellone Silvia and Lopes Rossetti Lucia, Protein disulfide isomerase and Nox: new partners in redox signaling, Current Pharmaceutical Design 2015; 21 (41) . https://dx.doi.org/10.2174/1381612821666151029112523
DOI https://dx.doi.org/10.2174/1381612821666151029112523 |
Print ISSN 1381-6128 |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-4286 |
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