title: TuJ1 (class III beta-tubulin) as phenotypic marker of lymphatic and venous valves.
abstract: Lymphatic and venous valves are essential for unidirectional circulation; however, no specific marker has been described for these valves. Here, we show that TuJ1 (class III beta-tubulin) is expressed strongly in valve endothelium but not in nonvalvular endothelium lining of lymphatics. TuJ1 is also expressed in venous valves mainly at the tip of leaflets. In contrast, endothelial markers CD31, CD34, and factor 8-related antigen did not distinguish valves from vascular endothelium. TuJ1 is also expressed irregularly in the vascular endothelium of hemangiomas. The data suggest that TuJ1 may be a phenotypic marker of lymphatic and venous valves, discriminating lymphatic and venous valvular endothelial cells from nonvalve lymphatic and vascular endothelial cells.
authors.affiliation: Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea.
authors.forename: Jun
authors.initials: J
authors.lastname: Kang
authors.forename: Inchul
authors.initials: I
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D015415:Biomarkers / Q000032:analysis; D004729:Endothelium, Lymphatic / Q000737:chemistry; D004730:Endothelium, Vascular / Q000737:chemistry / Q000473:pathology; D005260:Female; D006392:Hemangioma, Cavernous / Q000737:chemistry / Q000473:pathology; D006801:Humans; D008113:Liver Neoplasms / Q000737:chemistry / Q000473:pathology; D008198:Lymph Nodes / Q000737:chemistry*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014404:Tubulin / Q000032:analysis*; D014680:Veins / Q000737:chemistry* / Q000473:pathology
chemical_list: D015415:Biomarkers; C498585:TUBB3 protein, human; D014404:Tubulin