Exogenous stromal cell-derived factor-1 induces modest leukocyte recruitment in vivo

American Journal of Physiology. Heart and Circulatory Physiology
Steven M KerfootLixin Liu

Abstract

Stromal cell-derived factor-1 (SDF-1; CXCL12), a CXC chemokine, has been found to be involved in inflammation models in vivo and in cell adhesion, migration, and chemotaxis in vitro. This study aimed to determine whether exogenous SDF-1 induces leukocyte recruitment in mice. After systemic administration of SDF-1alpha, expression of the adhesion molecules P-selectin and VCAM-1 in mice was measured using a quantitative dual-radiolabeled Ab assay and leukocyte recruitment in various tissues was evaluated using intravital microscopy. The effect of local SDF-1alpha on leukocyte recruitment was also determined in cremaster muscle and compared with the effect of the cytokine TNFalpha and the CXC chemokine keratinocyte-derived chemokine (KC; CXCL1). Systemic administration of SDF-1alpha (10 microg, 4-5 h) induced upregulation of P-selectin, but not VCAM-1, in most tissues in mice. It caused modest leukocyte recruitment responses in microvasculature of cremaster muscle, intestine, and brain, i.e., an increase in flux of rolling leukocytes in cremaster muscle and intestines, leukocyte adhesion in all three tissues, and emigration in cremaster muscle. Local treatment with SDF-1alpha (1 microg, 4-5 h) reduced leukocyte rolling velocity an...Continue Reading

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Citations

Apr 4, 2014·PloS One·Silvana ZgraggenMichael Detmar
Feb 15, 2014·Clinica Chimica Acta; International Journal of Clinical Chemistry·Shun-Fa YangPo-Hui Wang
Sep 14, 2011·Biotechnology Progress·Hai-Hua SunFa-Ming Chen
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