Phospholipid chlorohydrin induces leukocyte adhesion to Apoe(-/-) mouse arteries via upregulation of P-selectin

G. Dever, R. Benson, C.L. Wainwright, S. Kennedy, C.M. Spickett

Research output: Contribution to journalArticle

Abstract

HOCl-modified low-density lipoprotein (LDL) has proinflammatory effects, including induction of inflammatory cytokine production, leukocyte adhesion, and ROS generation, but the components responsible for these effects are not completely understood. HOCl and the myeloperoxidase-H2O2-halide system can modify both protein and lipid moieties of LDL and react with unsaturated phospholipids to form chlorohydrins. We investigated the proinflammatory effects of 1-stearoyl-2-oleoyl-sn-3-glycerophosphocholine (SOPC) chlorohydrin on artery segments and spleen-derived leukocytes from ApoE-/- and C57 Bl/6 mice. Treatment of ApoE-/- artery segments with SOPC chlorohydrin, but not unmodified SOPC, caused increased leukocyte-arterial adhesion in a time- and concentration-dependent manner. This could be prevented by pretreatment of the artery with P-selectin or ICAM-1-blocking antibodies, but not anti-VCAM-1 antibody, and immunohistochemistry showed that P-selectin expression was upregulated. However, chlorohydrin treatment of leukocytes did not increase expression of adhesion molecules LFA-1 or PSGL-1, but caused increased release of ROS from PMA-stimulated leukocytes by a CD36-dependent mechanism. The SOPC chlorohydrin-induced adhesion and ROS generation could be abrogated by pretreatment of the ApoE-/- mice with pravastatin or a nitrated derivative, NCX 6550. These findings suggest that phospholipid chlorohydrins formed in HOCl-treated LDL could contribute to the proinflammatory effects observed for this modified lipoprotein in vitro.
LanguageEnglish
Pages452-463
Number of pages12
JournalFree Radical Biology and Medicine
Volume44
Issue number3
Early online date24 Oct 2007
DOIs
Publication statusPublished - 1 Feb 2008

Fingerprint

Chlorohydrins
P-Selectin
Apolipoproteins E
Phospholipids
Leukocytes
Up-Regulation
Adhesion
Arteries
LDL Lipoproteins
Pravastatin
Lymphocyte Function-Associated Antigen-1
Blocking Antibodies
Vascular Cell Adhesion Molecule-1
Intercellular Adhesion Molecule-1
Peroxidase
Lipoproteins
Spleen
Immunohistochemistry
1-stearoyl-2-oleoyl-sn-glycero-3-phosphocholine
Cytokines

Keywords

  • chlorinated phospholipids
  • ICAM-1
  • VCAM-1
  • p-selectin
  • reactive oxygen species
  • CD36
  • inflammation
  • statins
  • other systems of medicine
  • chemistry
  • biology

Cite this

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abstract = "HOCl-modified low-density lipoprotein (LDL) has proinflammatory effects, including induction of inflammatory cytokine production, leukocyte adhesion, and ROS generation, but the components responsible for these effects are not completely understood. HOCl and the myeloperoxidase-H2O2-halide system can modify both protein and lipid moieties of LDL and react with unsaturated phospholipids to form chlorohydrins. We investigated the proinflammatory effects of 1-stearoyl-2-oleoyl-sn-3-glycerophosphocholine (SOPC) chlorohydrin on artery segments and spleen-derived leukocytes from ApoE-/- and C57 Bl/6 mice. Treatment of ApoE-/- artery segments with SOPC chlorohydrin, but not unmodified SOPC, caused increased leukocyte-arterial adhesion in a time- and concentration-dependent manner. This could be prevented by pretreatment of the artery with P-selectin or ICAM-1-blocking antibodies, but not anti-VCAM-1 antibody, and immunohistochemistry showed that P-selectin expression was upregulated. However, chlorohydrin treatment of leukocytes did not increase expression of adhesion molecules LFA-1 or PSGL-1, but caused increased release of ROS from PMA-stimulated leukocytes by a CD36-dependent mechanism. The SOPC chlorohydrin-induced adhesion and ROS generation could be abrogated by pretreatment of the ApoE-/- mice with pravastatin or a nitrated derivative, NCX 6550. These findings suggest that phospholipid chlorohydrins formed in HOCl-treated LDL could contribute to the proinflammatory effects observed for this modified lipoprotein in vitro.",
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Phospholipid chlorohydrin induces leukocyte adhesion to Apoe(-/-) mouse arteries via upregulation of P-selectin. / Dever, G.; Benson, R.; Wainwright, C.L.; Kennedy, S.; Spickett, C.M.

In: Free Radical Biology and Medicine, Vol. 44, No. 3, 01.02.2008, p. 452-463.

Research output: Contribution to journalArticle

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T1 - Phospholipid chlorohydrin induces leukocyte adhesion to Apoe(-/-) mouse arteries via upregulation of P-selectin

AU - Dever, G.

AU - Benson, R.

AU - Wainwright, C.L.

AU - Kennedy, S.

AU - Spickett, C.M.

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KW - statins

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