title: Expression of lymphatic endothelium-specific hyaluronan receptor LYVE-1 in the developing mouse kidney.
abstract: Our knowledge of the embryonic development of the lymphatic vessels within the kidney is limited. The aim of this study was to establish the time of appearance and the distribution of intra-renal lymphatic vessels in the developing mouse kidney by using the lymphatic marker, LYVE-1. Kidneys from embryonic day 12 (E12) to E18, from neonates at post-natal day 1 (P1) to P21, and from adults were studied. In the adult mouse kidney, LYVE-1 was expressed mainly in the lymphatic endothelial cells (LECs) and in a subset of endothelial cells in the glomerular capillaries. However, in the developing mouse kidney, LYVE-1 was also expressed transiently in F4/80(+)/CD11b(-) immature macrophages/dendritic cells and in the developing renal vein. LYVE-1(+) lymphatic vessels connected with extra-renal lymphatics were detected in the kidney at E13. F4/80(+)/CD11b(-)/LYVE-1(+) immature macrophages/dendritic cells appeared prior to the appearance of LYVE-1(+) renal lymphatic vessels and were closely intermingled or even formed part of the lymphatic vascular wall. Prox1 was expressed only in the LYVE-1(+) LECs from fetus to adult-hood, but not in LYVE-1(+) endothelial cells of the developing renal vein and macrophages/dendritic cells. Thus, lymphatic vessels of the kidney might originate by extension of extra-renal lymphatics through an active branching process possibly associated with F4/80(+)/CD11b(-)/LYVE-1(+) macrophages/dendritic cells.
authors.affiliation: Department of Anatomy and MRC for Cell Death Disease Research Center, College of Medicine, The Catholic University of Korea, 505, Banpo-Dong, Seocho-Ku, Seoul, 137-701, Korea.
authors.forename: Hyun-Wook
authors.initials: HW
authors.lastname: Lee
authors.forename: Yan-Xia
authors.initials: YX
authors.lastname: Qin
authors.forename: Yu-Mi
authors.initials: YM
authors.lastname: Kim
authors.forename: Eun-Young
authors.initials: EY
authors.lastname: Park
authors.forename: Jin-Sun
authors.initials: JS
authors.lastname: Hwang
authors.forename: Guan-Hua
authors.initials: GH
authors.lastname: Huo
authors.forename: Chul-Woo
authors.initials: CW
authors.lastname: Yang
authors.forename: Wan-Young
authors.initials: WY
authors.lastname: Kim
authors.forename: Jin
authors.initials: J
authors.lastname: Kim
mesh_terms: D000818:Animals; D042783:Endothelial Cells / Q000378:metabolism; D004729:Endothelium, Lymphatic / Q000196:embryology / Q000378:metabolism*; D005260:Female; D006023:Glycoproteins / Q000378:metabolism*; D018960:Hyaluronan Receptors / Q000378:metabolism*; D007668:Kidney / Q000196:embryology* / Q000378:metabolism; D026901:Membrane Transport Proteins; D051379:Mice; D008810:Mice, Inbred C57BL
chemical_list: D006023:Glycoproteins; D018960:Hyaluronan Receptors; D026901:Membrane Transport Proteins; C492273:LYVE1 protein, mouse