Effect of Sphingomyelinase-Treated LDLs on HUVECs.
ceramide
low-density lipoprotein
oxidative stress
sphingomyelinase
Journal
Molecules (Basel, Switzerland)
ISSN: 1420-3049
Titre abrégé: Molecules
Pays: Switzerland
ID NLM: 100964009
Informations de publication
Date de publication:
23 Feb 2023
23 Feb 2023
Historique:
received:
12
01
2023
revised:
16
02
2023
accepted:
17
02
2023
entrez:
11
3
2023
pubmed:
12
3
2023
medline:
15
3
2023
Statut:
epublish
Résumé
Low-density lipoproteins (LDLs) exert a key role in the transport of esterified cholesterol to tissues. Among the atherogenic modifications of LDLs, the oxidative modification has been mainly investigated as a major risk factor for accelerating atherogenesis. Since LDL sphingolipids are also emerging as important regulators of the atherogenic process, increasing attention is devoted to the effects of sphingomyelinase (SMase) on LDL structural and atherogenic properties. The aims of the study were to investigate the effect of SMase treatment on the physical-chemical properties of LDLs. Moreover, we evaluated cell viability, apoptosis, and oxidative and inflammatory status in human umbilical vein endothelial cells (HUVECs) treated with either ox-LDLs or SMase-treated LDLs (SMase-LDLs). Both treatments were associated with the accrual of the intracellular ROS and upregulation of the antioxidant Paraoxonase 2 (PON2), while only SMase-LDLs induced an increase of superoxide dismutase 2 (SOD2), suggesting the activation of a feedback loop to restrain the detrimental effects of ROS. The increased caspase-3 activity and reduced viability observed in cells treated with SMase-LDLs and ox-LDLs suggest a pro-apoptotic effect of these modified lipoproteins on endothelial cells. Moreover, a strong proinflammatory effect of SMase-LDLs compared to ox-LDLs was confirmed by an increased activation of NF-κB and consequent increased expression of its downstream cytokines IL-8 and IL-6 in HUVECs.
Identifiants
pubmed: 36903354
pii: molecules28052100
doi: 10.3390/molecules28052100
pmc: PMC10004656
pii:
doi:
Substances chimiques
Sphingomyelin Phosphodiesterase
EC 3.1.4.12
Reactive Oxygen Species
0
Lipoproteins, LDL
0
Antioxidants
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
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