We have located links that may give you full text access.
JOURNAL ARTICLE
RESEARCH SUPPORT, N.I.H., EXTRAMURAL
Deletion of P2Y2 receptor reveals a role for lymphotoxin-α in fatty streak formation.
Vascular Pharmacology 2016 October
BACKGROUND: Lymphotoxin alpha (LTα) is expressed in human atherosclerotic lesions and genetic variations in the LTα pathway have been linked to myocardial infarction. Activation of the P2Y2 nucleotide receptor (P2Y2R) regulates the production of LTα. in vitro. We aimed to uncover a potential pathway linking purinergic receptor to LTα-mediated inflammatory processes pivotal to the early stages of atherosclerosis in apolipoprotein E (ApoE(-)(/)(-)) deficient mice.
METHODS AND RESULTS: En face immunostaining revealed that P2Y2R and VCAM-1 are preferentially expressed in the atherosclerosis prone site of the mouse aortic sinus. Deletion of the P2Y2R gene suppresses VCAM-1 expression. Compared with ApoE(-)(/)(-) mice, ApoE(-)(/)(-) mice lacking the P2Y2R gene (ApoE(-)(/)(-)/P2Y2R(-)(/)(-)) did not develop fatty streak lesions when fed a standard chow diet for 15weeks. Systemic and CD4(+) T cell production of the pro-inflammatory cytokine lymphotoxin-alpha (LTα) were specifically inhibited in ApoE(-)(/)(-)/P2Y2R(-)(/)(-)mice. Anti-LTα preventive treatment was initiated in ApoE(-)(/)(-)mice with intraperitoneal administration of recombinant human tumor necrosis factor receptor 1 fusion protein (TNFR1-Fc) on 5 consecutive days before the disease onset. Remarkably, none of the TNFR1:Fc-treated ApoE(-)(/)(-)mice exhibited atherosclerotic lesions at any developmental stage.
SIGNIFICANCE: ApoE(-)(/)(-) mice deficient in P2Y2R exhibit low endothelial cell VCAM-1 levels, decreased production of LTα and delayed onset of atherosclerosis. These data suggest that targeting this nucleotide receptor could be an effective therapeutic approach in atherosclerosis.
METHODS AND RESULTS: En face immunostaining revealed that P2Y2R and VCAM-1 are preferentially expressed in the atherosclerosis prone site of the mouse aortic sinus. Deletion of the P2Y2R gene suppresses VCAM-1 expression. Compared with ApoE(-)(/)(-) mice, ApoE(-)(/)(-) mice lacking the P2Y2R gene (ApoE(-)(/)(-)/P2Y2R(-)(/)(-)) did not develop fatty streak lesions when fed a standard chow diet for 15weeks. Systemic and CD4(+) T cell production of the pro-inflammatory cytokine lymphotoxin-alpha (LTα) were specifically inhibited in ApoE(-)(/)(-)/P2Y2R(-)(/)(-)mice. Anti-LTα preventive treatment was initiated in ApoE(-)(/)(-)mice with intraperitoneal administration of recombinant human tumor necrosis factor receptor 1 fusion protein (TNFR1-Fc) on 5 consecutive days before the disease onset. Remarkably, none of the TNFR1:Fc-treated ApoE(-)(/)(-)mice exhibited atherosclerotic lesions at any developmental stage.
SIGNIFICANCE: ApoE(-)(/)(-) mice deficient in P2Y2R exhibit low endothelial cell VCAM-1 levels, decreased production of LTα and delayed onset of atherosclerosis. These data suggest that targeting this nucleotide receptor could be an effective therapeutic approach in atherosclerosis.
Full text links
Trending Papers
A Personalized Approach to the Management of Congestion in Acute Heart Failure.Heart International 2023
Potential Mechanisms of the Protective Effects of the Cardiometabolic Drugs Type-2 Sodium-Glucose Transporter Inhibitors and Glucagon-like Peptide-1 Receptor Agonists in Heart Failure.International Journal of Molecular Sciences 2024 Februrary 21
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app