TY - JOUR
T1 - Amelogenin in Cranio-facial Development: The Tooth as a Model to Study the Role of Amelogenin During Embryogenesis
AU - Gruenbaum-Cohen, Yael
AU - Tucker, Abigail S.
AU - Haze, Amir
AU - Shilo, Dekel
AU - Taylor, Angela L.
AU - Shay, Boaz
AU - Sharpe, Paul T.
AU - Mitsiadis, Thimios A.
AU - Ornoy, Asher
AU - Blumenfeld, Anat
AU - Deutsch, Dan
PY - 2009/7
Y1 - 2009/7
N2 - The amelogenins comprise 90% of the developing extracellular enamel matrix proteins and play a major role in the biomineralization and structural organization of enamel. Amelogenins were also detected, in smaller amounts, in postnatal calcifying mesenchymal tissues, and in several nonmineralizing tissues including brain. Low molecular mass amelogenin isoforms were suggested to have signaling activity; to produce ectopically chondrogenic and osteogenic-like tissue and to affect mouse tooth germ differentiation in vitro. Recently, some amelogenin isoforms were found to bind to the cell surface receptors; LAMP-1, LAMP-2 and CD63, and subsequently localize to the perinuclear region of the cell. The recombinant amelogenin protein (rHAM(+)) alone brought about regeneration of the tooth supporting tissues: cementum, periodontal ligament and alveolar bone, in the dog model, through recruitment of progenitor cells and mesenchymal stem cells.
We show that amelogenin is expressed in various tissues of the developing mouse embryonic cranio-facial complex such as brain, eye, ganglia, peripheral nerve trunks, cartilage and bone, and is already expressed at E10.5 in the brain and eye, long before the initiation of tooth formation. Amelogenin protein expression was detected in the tooth germ (dental lamina) already at E13.5, much earlier than previously reported (E19). Application of amelogenin (rHAM(+)) beads together with DiI, on E13.5 and E14.5 embryonic mandibular mesenchyme and on embryonic tooth germ, revealed recruitment of mesenchymal cells. The present results indicate that amelogenin has an important role in many tissues of the cranio-facial complex during mouse embryonic development and differentiation, and might be a multifunctional protein. J. Exp. Zool. (Mol. Dev. Evol.) 312B:445-457, 2009. (C) 2008 Wiley-Liss, Inc.
AB - The amelogenins comprise 90% of the developing extracellular enamel matrix proteins and play a major role in the biomineralization and structural organization of enamel. Amelogenins were also detected, in smaller amounts, in postnatal calcifying mesenchymal tissues, and in several nonmineralizing tissues including brain. Low molecular mass amelogenin isoforms were suggested to have signaling activity; to produce ectopically chondrogenic and osteogenic-like tissue and to affect mouse tooth germ differentiation in vitro. Recently, some amelogenin isoforms were found to bind to the cell surface receptors; LAMP-1, LAMP-2 and CD63, and subsequently localize to the perinuclear region of the cell. The recombinant amelogenin protein (rHAM(+)) alone brought about regeneration of the tooth supporting tissues: cementum, periodontal ligament and alveolar bone, in the dog model, through recruitment of progenitor cells and mesenchymal stem cells.
We show that amelogenin is expressed in various tissues of the developing mouse embryonic cranio-facial complex such as brain, eye, ganglia, peripheral nerve trunks, cartilage and bone, and is already expressed at E10.5 in the brain and eye, long before the initiation of tooth formation. Amelogenin protein expression was detected in the tooth germ (dental lamina) already at E13.5, much earlier than previously reported (E19). Application of amelogenin (rHAM(+)) beads together with DiI, on E13.5 and E14.5 embryonic mandibular mesenchyme and on embryonic tooth germ, revealed recruitment of mesenchymal cells. The present results indicate that amelogenin has an important role in many tissues of the cranio-facial complex during mouse embryonic development and differentiation, and might be a multifunctional protein. J. Exp. Zool. (Mol. Dev. Evol.) 312B:445-457, 2009. (C) 2008 Wiley-Liss, Inc.
U2 - 10.1002/jez.b.21255
DO - 10.1002/jez.b.21255
M3 - Article
VL - 312B
SP - 445
EP - 457
JO - JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION
JF - JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION
IS - 5
ER -