title: Mucosal addressin cell adhesion molecule 1 plays an unexpected role in the development of mouse guard hair.
abstract: The first wave of coat hair development is initiated around embryonic day 14 in the mouse. Whereas ectodysplasin and ectodermal dysplasia receptor, tumor necrosis factor and tumor necrosis factor receptor family molecules, respectively, were identified to be signals triggering this process, not much was known regarding their downstream molecular targets. In this report, we show that mucosal addressin cell adhesion molecule 1 and intercellular adhesion molecule 1 are induced in the keratinocytes of the hair placode as a direct consequence of ectodermal dysplasia receptor signal, and tumor-necrosis-factor-receptor-associated factor 6 is involved in this mucosal addressin cell adhesion molecule 1 expression. Experiments using an in vitro culture of skin fragments demonstrated that ectodermal-dysplasia-receptor-induced mucosal addressin cell adhesion molecule 1 expression occurs at the initial phase of follicle development before involvement of Sonic hedgehog signal. Follicle development in this culture was also suppressed to some extent, though not completely, by addition of soluble mucosal addressin cell adhesion molecule 1/IgG-Fc chimeric protein, whereas monoclonal antibody that can inhibit mucosal addressin cell adhesion molecule 1 interaction with integrin alpha4beta7 had no effect on this process. These results demonstrated for the first time that the structural proteins, mucosal addressin cell adhesion molecule 1 and intercellular adhesion molecule 1, are induced by ectodermal dysplasia receptor signal and suggested the potential involvement of mucosal addressin cell adhesion molecule 1 in the morphogenesis of follicular keratinocytes.
authors.affiliation: Department of Molecular Genetics, Graduate School of Medicine, Kyoto University, Kyoto, Japan. enishiok@cdb.riken.go.jp
authors.forename: Eri
authors.initials: E
authors.lastname: Nishioka
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Hisahiro
authors.initials: H
authors.lastname: Yoshida
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Matsumura
authors.forename: Satomi
authors.initials: S
authors.lastname: Nishikawa
authors.forename: Asuka
authors.initials: A
authors.lastname: Naito
authors.forename: Jun-ichiro
authors.initials: J
authors.lastname: Inoue
authors.forename: Yoko
authors.initials: Y
authors.lastname: Funasaka
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Ichihashi
authors.forename: Masayuki
authors.initials: M
authors.lastname: Miyasaka
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Nishikawa
mesh_terms: D000818:Animals; D015815:Cell Adhesion Molecules; D004475:Ectoderm / Q000166:cytology*; D053331:Ectodysplasins; D053339:Edar Receptor; D018859:Hair Follicle / Q000737:chemistry / Q000166:cytology / Q000196:embryology*; D007136:Immunoglobulins / Q000032:analysis / Q000235:genetics / Q000378:metabolism*; D018799:Intercellular Adhesion Molecule-1 / Q000032:analysis / Q000502:physiology; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D008817:Mice, Mutant Strains; D009088:Mucoproteins / Q000032:analysis / Q000235:genetics / Q000378:metabolism*; D009924:Organ Culture Techniques; D011506:Proteins / Q000037:antagonists & inhibitors / Q000378:metabolism; D053338:Receptors, Ectodysplasin; D018124:Receptors, Tumor Necrosis Factor; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000502:physiology; D048029:TNF Receptor-Associated Factor 6; D014704:Veratrum Alkaloids / Q000494:pharmacology
chemical_list: D015815:Cell Adhesion Molecules; D053331:Ectodysplasins; C506019:Eda protein, mouse; D053339:Edar Receptor; C506009:Edar protein, mouse; D007136:Immunoglobulins; C489082:Madcam1 protein, mouse; D008565:Membrane Proteins; D009088:Mucoproteins; D011506:Proteins; D053338:Receptors, Ectodysplasin; D018124:Receptors, Tumor Necrosis Factor; D011993:Recombinant Fusion Proteins; D048029:TNF Receptor-Associated Factor 6; D014704:Veratrum Alkaloids; D018799:Intercellular Adhesion Molecule-1; C000541:cyclopamine