title: Heparanase of murine effector lymphocytes and neutrophils is not required for their diapedesis into sites of inflammation.
abstract: Heparanase, the exclusive mammalian heparan sulfate-degrading enzyme, has been suggested to be utilized by leukocytes to penetrate through the dense basement membranes surrounding blood venules. Despite its established role in tumor cell invasion, heparanase function in leukocyte extravasation has never been demonstrated. We found that TH1/TC1-type effector T cells are highly enriched for this enzyme, with a 3.6-fold higher heparanase mRNA expression compared with naive lymphocytes. Using adoptive transfer of wild-type and heparanase-deficient effector T cells into inflamed mice, we show that T-cell heparanase was not required for extravasation inside inflamed lymph nodes or skin. Leukocyte extravasation through acute inflamed skin vessels was also heparanase independent. Furthermore, neutrophils emigrated to the inflamed peritoneal cavity independently of heparanase expression on either the leukocytes or on the endothelial and mesothelial barriers, and overexpression of the enzyme on neutrophils did not facilitate their emigration. However, heparanase absence significantly reduced monocyte emigration into the inflamed peritoneal cavity. These results collectively suggest that neither leukocyte nor endothelial heparanase is required for T-cell and neutrophil extravasation through inflamed vascular barriers, whereas this enzyme is required for optimal monocyte recruitment to inflamed peritoneum.
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Liat
authors: L
authors: Stoler-Barak
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Ekaterina
authors: E
authors: Petrovich
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Tegest
authors: T
authors: Aychek
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Irina
authors: I
authors: Gurevich
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Orna
authors: O
authors: Tal
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Miki
authors: M
authors: Hatzav
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Neta
authors: N
authors: Ilan
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Sara W
authors: SW
authors: Feigelson
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Guy
authors: G
authors: Shakhar
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel.
authors: Israel
authors: I
authors: Vlodavsky
authors: *Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel; and Cancer and Vascular Biology Research Center, The Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel ronen.alon@weizmann.ac.il.
authors: Ronen
authors: R
authors: Alon
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000166:cytology / Q000201:enzymology / Q000276:immunology*; D005260:Female; D005434:Flow Cytometry; D005966:Glucuronidase / Q000502:physiology*; D007249:Inflammation / Q000201:enzymology / Q000276:immunology* / Q000473:pathology; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D009504:Neutrophils / Q000166:cytology / Q000201:enzymology / Q000276:immunology*; D012333:RNA, Messenger / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012867:Skin / Q000201:enzymology / Q000276:immunology* / Q000473:pathology; D013601:T-Lymphocytes / Q000166:cytology / Q000201:enzymology / Q000276:immunology*; D000099175:Heparanase
chemical_list: D005966:Glucuronidase; D012333:RNA, Messenger; D000099175:Heparanase
keywords: extracellular matrix; extravasation; heparan sulfate; leukocytes; postcapillary venules