title: Establishment and characterization of conditionally immortalized endothelial cell lines from the thoracic duct and inferior vena cava of tsA58/EGFP double-transgenic rats.
abstract: The basic biology of blood vascular endothelial cells has been well documented. However, little is known about that of lymphatic endothelial cells, despite their importance under normal and pathological conditions. The lack of a lymphatic endothelial cell line has hampered progress in this field. The objective of this study has been to establish and characterize lymphatic and venous endothelial cell lines derived from newly developed tsA58/EGFP transgenic rats harboring the temperature-sensitive simian virus 40 (SV40) large T-antigen and enhanced green fluorescent protein (EGFP). Endothelial cells were isolated from the transgenic rats by intraluminal enzymatic digestion. The cloned cell lines were named TR-LE (temperature-sensitive rat lymphatic endothelial cells from thoracic duct) and TR-BE (temperature-sensitive rat blood-vessel endothelial cells from inferior vena cava), respectively, and cultured on fibronectin-coated dishes in HuMedia-EG2 supplemented with 20% fetal bovine serum and Endothelial Mitogen at a permissive temperature, 33 degrees C. A temperature shift to 37 degrees C resulted in a decrease in proliferation with degradation of the large T-antigen and cleavage of poly (ADP-ribose) polymerase. TR-LE cells expressed lymphatic endothelial markers VEGFR-3 (vascular endothelial growth factor receptor), LYVE-1 (a lymphatic endothelial receptor), Prox-1 (a homeobox gene product), and podoplanin (a glomerular podocyte membrane mucoprotein), together with endothelial markers CD31, Tie-2, and VEGFR-2, whereas TR-BE cells expressed CD31, Tie-2, and VEGFR-2, but no lymphatic endothelial markers. Thus, these conditionally immortalized and EGFP-expressing lymphatic and vascular endothelial cell lines might represent an important tool for the study of endothelial cell functions in vitro.
authors.affiliation: Department of Anatomy, University of Toyama, Toyama, Japan.
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Matsuo
authors.forename: Keiichi
authors.initials: K
authors.lastname: Koizumi
authors.forename: Sanae
authors.initials: S
authors.lastname: Yamada
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Tomi
authors.forename: Ri-ichi
authors.initials: R
authors.lastname: Takahashi
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Ueda
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Terasaki
authors.forename: Masuo
authors.initials: M
authors.lastname: Obinata
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Hosoya
authors.forename: Osamu
authors.initials: O
authors.lastname: Ohtani
authors.forename: Ikuo
authors.initials: I
authors.lastname: Saiki
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified; D000957:Antigens, Viral, Tumor / Q000235:genetics; D015415:Biomarkers / Q000032:analysis; D018929:Cell Culture Techniques; D002461:Cell Line, Transformed; D049109:Cell Proliferation; D002472:Cell Transformation, Viral; D002999:Clone Cells; D042783:Endothelial Cells / Q000166:cytology* / Q000378:metabolism / Q000502:physiology / Q000648:ultrastructure; D004729:Endothelium, Lymphatic / Q000166:cytology; D004730:Endothelium, Vascular / Q000166:cytology; D005456:Fluorescent Dyes / Q000378:metabolism; D020869:Gene Expression Profiling; D049452:Green Fluorescent Proteins / Q000378:metabolism; D051381:Rats; D013539:Simian virus 40 / Q000502:physiology; D013696:Temperature; D013897:Thoracic Duct / Q000166:cytology*; D014682:Vena Cava, Inferior / Q000166:cytology*
chemical_list: D000957:Antigens, Viral, Tumor; D015415:Biomarkers; D005456:Fluorescent Dyes; C485184:enhanced green fluorescent protein; D049452:Green Fluorescent Proteins