title: Calcitonin receptor and Odz4 are differently expressed in Pax7-positive cells during skeletal muscle regeneration.
abstract: Satellite cells, muscle-specific stem cells, are anatomically identified as the mononuclear cells residing external to the myofiber plasma membrane and beneath the basal lamina. Skeletal muscle has great regenerative potential, and the regeneration process depends absolutely on satellite cells. In uninjured muscle, satellite cells are maintained in a quiescent state, and some genes are expressed in a quiescent-specific manner. Here we show that Odz4/Ten-m4, a mouse homolog of the Drosophila pair-rule gene odd Oz (odz or Ten-m), is expressed in quiescent satellite cells on the protein level, but not in activated/proliferating myoblasts. Intriguingly, the timing of the reappearance of Odz4 and calcitonin receptor (another quiescence molecule) on Pax7-positive cells was different during the regeneration process. In addition, almost all neonatal satellite cells express Odz4, but only some of them express calcitonin receptor. These results indicate that Odz4 may be useful as a new marker of satellite cells and that quiescence molecules are differently expressed in regenerating and neonatal muscle.
authors.affiliation: Laboratory of Molecular and Cellular Physiology, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Yamaguchi
authors.forename: Ryo
authors.initials: R
authors.lastname: Ogawa
authors.forename: Yoko
authors.initials: Y
authors.lastname: Watanabe
authors.forename: Akiyoshi
authors.initials: A
authors.lastname: Uezumi
authors.forename: Yuko
authors.initials: Y
authors.lastname: Miyagoe-Suzuki
authors.forename: Kazutake
authors.initials: K
authors.lastname: Tsujikawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamamoto
authors.forename: Shin'ichi
authors.initials: S
authors.lastname: Takeda
authors.forename: So-ichiro
authors.initials: S
authors.lastname: Fukada
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002478:Cells, Cultured; D018507:Gene Expression Regulation, Developmental; D008565:Membrane Proteins; D051379:Mice; D008810:Mice, Inbred C57BL; D018482:Muscle, Skeletal / Q000254:growth & development / Q000293:injuries / Q000378:metabolism; D032446:Myoblasts / Q000166:cytology / Q000378:metabolism; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D051763:PAX7 Transcription Factor / Q000378:metabolism; D018003:Receptors, Calcitonin / Q000235:genetics / Q000378:metabolism*; D012038:Regeneration / Q000502:physiology*; D032496:Satellite Cells, Skeletal Muscle / Q000166:cytology / Q000378:metabolism
chemical_list: D008565:Membrane Proteins; D009687:Nuclear Proteins; D051763:PAX7 Transcription Factor; C497322:Pax7 protein, mouse; D018003:Receptors, Calcitonin; C113761:Tenm4 protein, mouse