title: Differentiation of mouse iPS cells into ameloblast-like cells in cultures using medium conditioned by epithelial cell rests of Malassez and gelatin-coated dishes.
abstract: Induced pluripotent stem (iPS) cells are generated from adult cells and are potentially of great value in regenerative medicine. Recently, it was shown that iPS cells can differentiate into ameloblast-like cells in cultures using feeder cells. In the present study, we sought to induce differentiation of ameloblast-like cells from iPS cells under feeder-free conditions using medium conditioned by cultured epithelial cell rests of Malassez (ERM) cells and gelatin-coated dishes. Two culture conditions were compared: co-cultures of iPS cells and ERM cells; and, culture of iPS cells in ERM cell-conditioned medium. Differentiation of ameloblast-like cells in the cultures was assessed using real-time RT-PCR assays of expression of the marker genes keratin 14, amelogenin, and ameloblastin and by immunocytochemical staining for amelogenin. We found greater evidence of ameloblast-like cell differentiation in the cultures using the conditioned medium. In the latter, the level of amelogenin expression increased daily and was significantly higher than controls on the 7th, 10th, and 14th days. Expression of ameloblastin also increased daily and was significantly higher than controls on the 14th day. The present study demonstrates that mouse iPS cells can be induced to differentiate into ameloblast-like cells in feeder-free cell cultures using ERM cell-conditioned medium and gelatin-coated dishes.
authors.affiliation: Division of Oral Medicine and Pathology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan.
authors.forename: Koki
authors.initials: K
authors.lastname: Yoshida
authors.affiliation: Division of Oral Medicine and Pathology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Sato
authors.affiliation: Division of Oral Medicine and Pathology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan.
authors.forename: Rie
authors.initials: R
authors.lastname: Takai
authors.affiliation: Division of Disease Control and Molecular Epidemiology, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, 061-0293, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Uehara
authors.affiliation: Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, 061-0293, Japan.
authors.forename: Yoshihito
authors.initials: Y
authors.lastname: Kurashige
authors.affiliation: Division of Oral Medicine and Pathology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan.
authors.forename: Michiko
authors.initials: M
authors.lastname: Nishimura
authors.affiliation: Division of Disease Control and Molecular Epidemiology, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, 061-0293, Japan.
authors.forename: Itsuo
authors.initials: I
authors.lastname: Chiba
authors.affiliation: Division of Pediatric Dentistry, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, 061-0293, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Saitoh
authors.affiliation: Division of Oral Medicine and Pathology, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido, 061-0293, Japan. yoshi-ab@hoku-iryo-u.ac.jp.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Abiko
mesh_terms: D000565:Ameloblasts / Q000378:metabolism*; D053523:Amelogenin / Q000235:genetics; D000818:Animals; D002454:Cell Differentiation; D002478:Cells, Cultured; D017077:Culture Media, Conditioned; D003746:Dental Enamel Proteins / Q000235:genetics; D015870:Gene Expression; D057026:Induced Pluripotent Stem Cells / Q000502:physiology*; D053547:Keratin-14 / Q000235:genetics; D051379:Mice
chemical_list: C490890:Ambn protein, mouse; D053523:Amelogenin; C507200:Amelx protein, mouse; D017077:Culture Media, Conditioned; D003746:Dental Enamel Proteins; D053547:Keratin-14; C507446:Krt14 protein, mouse
keywords: Ameloblast; Epithelial rests of Malassez; Feeder-free; Induced pluripotent stem; iPS