Abstract |
Adhesive interactions between endothelial cells and leukocytes contribute to atherosclerotic plaque growth. However, mechanism(s) responsible for endothelial priming and deactivation in inflammatory diseases such as atherosclerosis are not clear. Apolipoprotein E deficient mice were generated with deficiency of P-selectin glycoprotein ligand-1 (Psgl-1(-/-), ApoE(-/-)). On both standard chow and Western diet, Psgl-1(-/-), ApoE(-/-) mice were protected against atherosclerosis compared to Psgl-1(+/+), ApoE(-/-) controls. Psgl-1(-/-), ApoE(-/-) mice also showed reduced leukocyte rolling and firm attachment on endothelial cells, however, adoptively transferred Psgl-1(+/+), ApoE(-/-) leukocytes into Psgl-1(-/-), ApoE(-/-) hosts displayed similar reduced rolling as Psgl-1(-/-), ApoE(-/-) leukocytes. Hematopoietic deficiency of Psgl-1 conferred resistance to the effects of interleukin-1β (IL-1β) on leukocyte rolling along with reduced circulating levels of sP-sel and sE-sel. Antibody blockade of Psgl-1 also reduced endothelial activation in response to IL-1β, eliminated leukocyte rolling, and was protective against atherosclerosis in ApoE(-/-) mice. Monocyte depletion with clodronate restored the endothelial response to IL-1β in Psgl-1(-/-) mice. This study suggests that Psgl-1 deficiency leads to reduced atherosclerosis and adhesive interactions between endothelial cells and leukocytes by indirectly regulating endothelial responses to cytokine stimulation.
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Authors | Wei Luo, Hui Wang, Miina K Ohman, Chiao Guo, Kate Shi, Julia Wang, Daniel T Eitzman |
Journal | Atherosclerosis
(Atherosclerosis)
Vol. 220
Issue 1
Pg. 110-7
(Jan 2012)
ISSN: 1879-1484 [Electronic] Ireland |
PMID | 22041028
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Copyright | Published by Elsevier Ireland Ltd. |
Chemical References |
- Antibodies
- Apolipoproteins E
- Cytokines
- E-Selectin
- Interleukin-1beta
- Membrane Glycoproteins
- P-Selectin
- P-selectin ligand protein
- Clodronic Acid
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Topics |
- Adoptive Transfer
- Animals
- Antibodies
(pharmacology)
- Apolipoproteins E
(deficiency, genetics)
- Atherosclerosis
(genetics, immunology, metabolism, pathology, prevention & control)
- Bone Marrow Transplantation
- Clodronic Acid
(pharmacology)
- Cytokines
(metabolism)
- Disease Models, Animal
- E-Selectin
(blood)
- Endothelial Cells
(drug effects, immunology, metabolism, pathology)
- Interleukin-1beta
(metabolism)
- Leukocyte Rolling
- Leukocytes
(drug effects, immunology, metabolism)
- Membrane Glycoproteins
(antagonists & inhibitors, deficiency, genetics)
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Monocytes
(drug effects, immunology, metabolism)
- P-Selectin
(blood)
- Time Factors
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