ArticleThe journal of trauma and acute care surgery2019
Endothelial cell dysfunction during anoxia-reoxygenation is associated with a decrease in adenosine triphosphate levels, rearrangement in lipid bilayer phosphatidylserine asymmetry, and an increase in endothelial cell permeability.
Article in The journal of trauma and acute care surgery, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
2 citing papers in PubMed, 3 citations in OpenAlex.
- Membrane curvature and PS localize coagulation proteins to filopodia and retraction fibers of endothelial cells.Blood advances · 2023Article
- Human Umbilical Cord Mesenchymal Stem Cell-Derived Exosomes Accelerate Diabetic Wound HealingFrontiers in bioengineering and biotechnology · 2022Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
backgroundPhosphatidylserine (PS) is normally confined in an energy-dependent manner to the inner leaflet of the lipid cell membrane. During cellular stress, PS is exteriorized to the outer layer, initiating a cascade of events. Because cellular stress is often accompanied by decreased energy levels and because maintaining PS asymmetry is an energy-dependent process, it would make sense that cellular stress associated with decreased energy levels is also associated with PS exteriorization that ultimately leads to endothelial cell dysfunction. Our hypothesis was that anoxia-reoxygenation (A-R) is associated with decreased adenosine triphosphate (ATP) levels, increased PS exteriorization on endothelial cell membranes, and increased endothelial cell membrane permeability.
methodsThe effect on ATP levels during A-R was measured via colorimetric assay in cultured cells. To measure the effect of A-R on PS levels, cultured cells underwent A-R and exteriorized PS levels and also total cell PS were measured via biofluorescence assay. Finally, we measured endothelial cell monolayer permeability to albumin after A-R.
resultsThe ATP levels in cell culture decreased 27% from baseline after A-R (p < 0.02). There was over a twofold increase in exteriorized PS as compared with controls (p < 0.01). Interestingly, we found that during A-R, the total amount of cellular PS increased (p < 0.01). The finding that total PS changed twofold over normal cells suggested that not only is there a change in the distribution of PS across the cell membrane, but there may also be an increase in the amount of PS inside the cell. Finally, A-R increased endothelial cell monolayer permeability (p < 0.01).
conclusionWe found that endothelial cell dysfunction during A-R is associated with decreased ATP levels, increased PS exteriorization, and increased in monolayer permeability. This supports the idea that PS exteriorization may a key event during clinical scenarios involving oxygen lack and may 1 day lead to novel therapies in these situations.
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