Skip to main content
Journal cover image

PECAM-1 dampens cytokine levels during LPS-induced endotoxemia by regulating leukocyte trafficking.

Publication ,  Journal Article
Privratsky, JR; Tilkens, SB; Newman, DK; Newman, PJ
Published in: Life Sci
January 30, 2012

AIMS: To investigate the mechanism by which platelet endothelial cell adhesion molecule 1 (PECAM-1/CD31), an immunoglobulin (Ig)-superfamily cell adhesion and signaling receptor, regulates pro-inflammatory cytokine levels. The purpose of the present investigation was to test the hypothesis that PECAM-1 influences circulating cytokine levels by regulating the trafficking of activated, cytokine-producing leukocytes to sites of inflammation. MAIN METHODS: PECAM-1+/+ and PECAM-1-/- mice were subjected to lipopolysaccharide (LPS)-induced endotoxemia, and systemic cytokine levels were measured by Bioplex multiplex cytokine assays. Flow cytometry was employed to enumerate leukocytes at inflammatory sites and to measure cytokine synthesis in leukocyte sub-populations. Enzyme-linked immunosorbent assay (ELISA) was used to measure cytokine levels in tissue samples and in supernatants of in vitro-stimulated leukocytes. KEY FINDINGS: We confirmed earlier reports that mice deficient in PECAM-1 had greater systemic levels of pro-inflammatory cytokines following intraperitoneal (IP) LPS administration. Interestingly, expression of PECAM-1, in mice, had negligible effects on the level of cytokine synthesis by leukocytes stimulated in vitro with LPS and in peritoneal macrophages isolated from LPS-injected mice. There was, however, excessive accumulation of macrophages and neutrophils in the lungs of PECAM-1-deficient, compared with wild-type, mice--an event that correlated with a prolonged increase in lung pro-inflammatory cytokine levels. SIGNIFICANCE: Our results demonstrate that PECAM-1 normally functions to dampen systemic cytokine levels during LPS-induced endotoxemia by diminishing the accumulation of cytokine-producing leukocytes at sites of inflammation, rather than by modulating cytokine synthesis by leukocytes.

Duke Scholars

Published In

Life Sci

DOI

EISSN

1879-0631

Publication Date

January 30, 2012

Volume

90

Issue

5-6

Start / End Page

177 / 184

Location

Netherlands

Related Subject Headings

  • Platelet Endothelial Cell Adhesion Molecule-1
  • Pharmacology & Pharmacy
  • Neutrophils
  • Mice, Knockout
  • Mice, Inbred C57BL
  • Mice
  • Macrophages
  • Lung
  • Lipopolysaccharides
  • Leukocytes
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Privratsky, J. R., Tilkens, S. B., Newman, D. K., & Newman, P. J. (2012). PECAM-1 dampens cytokine levels during LPS-induced endotoxemia by regulating leukocyte trafficking. Life Sci, 90(5–6), 177–184. https://doi.org/10.1016/j.lfs.2011.11.002
Privratsky, Jamie R., Sarah B. Tilkens, Debra K. Newman, and Peter J. Newman. “PECAM-1 dampens cytokine levels during LPS-induced endotoxemia by regulating leukocyte trafficking.Life Sci 90, no. 5–6 (January 30, 2012): 177–84. https://doi.org/10.1016/j.lfs.2011.11.002.
Privratsky JR, Tilkens SB, Newman DK, Newman PJ. PECAM-1 dampens cytokine levels during LPS-induced endotoxemia by regulating leukocyte trafficking. Life Sci. 2012 Jan 30;90(5–6):177–84.
Privratsky, Jamie R., et al. “PECAM-1 dampens cytokine levels during LPS-induced endotoxemia by regulating leukocyte trafficking.Life Sci, vol. 90, no. 5–6, Jan. 2012, pp. 177–84. Pubmed, doi:10.1016/j.lfs.2011.11.002.
Privratsky JR, Tilkens SB, Newman DK, Newman PJ. PECAM-1 dampens cytokine levels during LPS-induced endotoxemia by regulating leukocyte trafficking. Life Sci. 2012 Jan 30;90(5–6):177–184.
Journal cover image

Published In

Life Sci

DOI

EISSN

1879-0631

Publication Date

January 30, 2012

Volume

90

Issue

5-6

Start / End Page

177 / 184

Location

Netherlands

Related Subject Headings

  • Platelet Endothelial Cell Adhesion Molecule-1
  • Pharmacology & Pharmacy
  • Neutrophils
  • Mice, Knockout
  • Mice, Inbred C57BL
  • Mice
  • Macrophages
  • Lung
  • Lipopolysaccharides
  • Leukocytes