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  • Title: Differential activity of pro-angiogenic CXC chemokines.
    Author: Moldobaeva A, Baek A, Eldridge L, Wagner EM.
    Journal: Microvasc Res; 2010 Jul; 80(1):18-22. PubMed ID: 20144627.
    Abstract:
    We showed previously in a mouse model of lung ischemia-induced angiogenesis, enhanced expression of the three ELR+ CXC chemokines (KC, LIX, and MIP-2) and that blockade of the ligand receptor CXCR(2) limited neovascularization. The present study was undertaken to determine the relative abundance and angiogenic potential of the three CXC chemokines and whether RhoA activation explained the measured differences in potencies. We found that LIX showed the greatest absolute amount in the in vivo model 4 h after left pulmonary artery obstruction (LIX>KC>MIP-2; p<0.05). In vitro, LIX induced the greatest degree of arterial endothelial cell chemotaxis and KC was without effect. A significant increase (approximately 40%) in active RhoA was observed with both LIX and MIP-2 compared with vehicle control (p<0.05). On average, LIX induced the greatest amount of tube formation within pleural tissue in culture. Thus, the results of the present study suggest that among the three ELR+ CXC chemokines, LIX predominates in eliciting a pro-angiogenic phenotype.
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