title: Hyaluronan stimulates mobilization of mature hematopoietic cells but not hematopoietic progenitors.
abstract: Hyaluronan (HA) is expressed by cells in bone marrow where it contributes to the regulation of hematopoietic homeostasis. In this study, we have demonstrated that exogenous low molecular weight HA (LMW HA) polymers mobilize leukocytes, but not hematopoietic progenitor cells, to peripheral blood within a 3 hour time period following HA administration. Mobilization of leukocytes correlated with increased extracellular MMP-9 concentrations induced by LMW HA, but not high molecular weight (HMW) HA. In contrast, HMW HA up-regulated TIMP-1 expression in bone marrow cells. In vitro, HMW HA did not influence SDF-1 - mediated chemotaxis of hematopoietic progenitors, whereas LMW HA polymers demonstrated inhibitory activity. These findings suggest that the effects of HA on cell motility depend on the size of the HA polymers and on the type of target cells.
authors: Torrey Pines Institute for Molecular Studies, San Diego, CA 92121, USA.
authors: Ingrid
authors: I
authors: Schraufstatter
authors: Naira
authors: N
authors: Serobyan
authors: Richard
authors: R
authors: DiScipio
authors: Natalia
authors: N
authors: Feofanova
authors: Irina
authors: I
authors: Orlovskaya
authors: Sophia K
authors: SK
authors: Khaldoyanidi
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology / Q000187:drug effects* / Q000502:physiology; D002465:Cell Movement / Q000187:drug effects* / Q000502:physiology; D002478:Cells, Cultured; D014453:Glucuronosyltransferase / Q000378:metabolism; D019650:Hematopoietic Stem Cell Mobilization; D006412:Hematopoietic Stem Cells / Q000187:drug effects* / Q000502:physiology; D018960:Hyaluronan Receptors / Q000378:metabolism; D000076002:Hyaluronan Synthases; D006820:Hyaluronic Acid / Q000737:chemistry / Q000494:pharmacology*; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C
chemical_list: D018960:Hyaluronan Receptors; D006820:Hyaluronic Acid; D014453:Glucuronosyltransferase; D000076002:Hyaluronan Synthases; D020780:Matrix Metalloproteinase 9