Cited by 116Nitric Oxide and Endothelin EffectsRedox biology and oxidative stressCell death mechanisms and regulation

Blocking the REDD1/TXNIP axis ameliorates LPS-induced vascular endothelial cell injury through repressing oxidative stress and apoptosis

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Hou, Xuhui, Yang, Songbai, Yin, Jian·2019·American Journal of Physiology-Cell Physiology

Abstract

The aim of the present study was to investigate the potential role of regulated in development and DNA damage response 1 (REDD1) in LPS-induced vascular endothelial injury by using human umbilical vein endothelial cells (HUVECs). We observed that REDD1 expression was apparently elevated in HUVECs after exposure to LPS. Additionally, elimination of REDD1 strikingly attenuated the secretion of the proinflammatory cytokines TNF-α, IL-6, IL-1β, and monocyte chemotactic protein-1 and the endothelial cell adhesion markers ICAM-1 and VCAM-1 that was induced by LPS stimulation. Subsequently, knockdown of REDD1 augmented cell viability but ameliorated lactate dehydrogenase release in HUVECs stimulated with LPS. Meanwhile, depletion of REDD1 effectively restricted LPS-induced HUVEC apoptosis, as exemplified by reduced DNA fragmentation, and it also elevated antiapoptotic Bcl-2 protein, concomitant with reduced levels of proapoptotic proteins Bax and cleaved caspase-3. Furthermore, repression of REDD1 remarkably alleviated LPS-triggered intracellular reactive oxygen species generation accompanied by decreased malondialdehyde content and increased the activity of the endogenous antioxidant enzymes superoxide dismutase, catalase, and glutathione peroxidase. Most important, depletion of REDD1 protected HUVECs against inflammation-mediated apoptosis and oxidative damage partly through thioredoxin-interacting protein (TXNIP). Collectively, these findings indicate that blocking the REDD1/TXNIP axis repressed the inflammation-mediated vascular injury process, which may be closely related to oxidative stress and apoptosis in HUVECs, implying that the REDD1/TXNIP axis may be a new target for preventing the endothelial cell injury process.

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Crossref · 10.1152/ajpcell.00313.2018

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  • Age-related changes in the microbiota toward gram-negative and endotoxigenic bacteria are known to induce cellular senescence and apoptosis in endothelial cells and damage to intestinal epithelial cells and gut-associated lymphoid tissues, thereby disrupting intestinal epithelial barrier integrity.

    “Furthermore, age-related changes in the microbiota toward gram-negative and endotoxigenic bacteria are known to induce cellular senescence and apoptosis in endothelial cells and damage to intestinal epithelial cells and gut-associated lymphoid tissues thereby disrupting the intestinal epithelial barrier integrity (50–54).”

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Authors
Hou, X., Yang, S., & Yin, J.
Affiliations
Jilin University (CN)
Corresponding author
Yin, Jian
Venue
American Journal of Physiology-Cell Physiology
Published
2019-01-01
Volume
316
Issue
1
Pages
C104-C110
ISSN
  • 0363-6143 (ISSN-L)
  • 1522-1563
OpenAlex
W2903059149
Cited by
109
References
23
Citations by year
2026: 7 · 2025: 12 · 2024: 23 · 2023: 21 · 2022: 26 · 2021: 11 · 2020: 5 · 2019: 4
FWCI
3.43
Type
journal article
Language
en
Open access
Locations
  • American Journal of Physiology-Cell Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
REDD1, TXNIP, lipopolysaccharide, endothelial injury, oxidative stress, apoptosis, inflammation, endothelial cells, reactive oxygen species, inflammatory cytokines, endothelial adhesion molecules, Bcl-2/Bax, caspase-3, superoxide dismutase, catalase, glutathione peroxidase, malondialdehyde, therapeutic target
MeSH terms
Carrier Proteins, Endothelium, Vascular, Humans, Lipopolysaccharides, Transcription Factors, Apoptosis, Oxidative Stress, RNA, Small Interfering, Gene Knockdown Techniques, Human Umbilical Vein Endothelial Cells

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