“…However, heparin has been shown to down-regulate leukocyte adherence, migration, and recruitment to a site of injury or inflammation (Lever et al, 2000;Perretti and Page, 2000). In addition, heparin was also shown to inhibit the pathogenesis of inflammatory diseases, including asthma, emphysema, adult respiratory distress syndrome, primary skin allograft rejection, myocardial infarction, rheumatoid arthritis, and inflammatory bowel disease (Naparstek et al, 1993;Nelson et al, 1993;Gaffney and Gaffney, 1996;Hodak et al, 1998;Stefanidou et al, 1999;Tyrrell et al, 1999;Yanaka et al, 2000). In this study, it was found that the ability of CCL21 to stimulate T cell adhesion and chemotaxis was inhibited by heparin, heparan, and low-molecular-weight heparins.…”