Talk:Tongue Development: Difference between revisions

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==2011==
==2011==
===Bone morphogenetic protein-2 functions as a negative regulator in the differentiation of myoblasts, but not as an inducer for the formations of cartilage and bone in mouse embryonic tongue===


BMC Dev Biol. 2011 Jul 7;11(1):44. [Epub ahead of print]
BMC Dev Biol. 2011 Jul 7;11(1):44. [Epub ahead of print]
===Bone morphogenetic protein-2 functions as a negative regulator in the differentiation of myoblasts, but not as an inducer for the formations of cartilage and bone in mouse embryonic tongue===


Aoyama K, Yamane A, Suga T, Suzuki E, Fukui T, Nakamura Y.
Aoyama K, Yamane A, Suga T, Suzuki E, Fukui T, Nakamura Y.

Revision as of 11:34, 20 August 2011

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Cite this page: Hill, M.A. (2024, March 28) Embryology Tongue Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Talk:Tongue_Development

2011

Bone morphogenetic protein-2 functions as a negative regulator in the differentiation of myoblasts, but not as an inducer for the formations of cartilage and bone in mouse embryonic tongue

BMC Dev Biol. 2011 Jul 7;11(1):44. [Epub ahead of print]

Aoyama K, Yamane A, Suga T, Suzuki E, Fukui T, Nakamura Y.

Abstract ABSTRACT: BACKGROUND: In vitro studies using the myogenic cell line C2C12 demonstrate that bone morphogenetic protein-2 (BMP-2) converts the developmental pathway of C2C12 from a myogenic cell lineage to an osteoblastic cell lineage. Further, in vivo studies using null mutation mice demonstrate that BMPs inhibit the specification of the developmental fate of myogenic progenitor cells. However, the roles of BMPs in the phases of differentiation and maturation in skeletal muscles have yet to be determined. The present study attempts to define the function of BMP-2 in the final stage of differentiation of mouse tongue myoblast. RESULTS: Recombinant BMP-2 inhibited the expressions of markers for the differentiation of skeletal muscle cells, such as myogenin, muscle creatine kinase (MCK), and fast myosin heavy chain (fMyHC), whereas BMP-2 siRNA stimulated such markers. Neither the recombinant BMP-2 nor BMP-2 siRNA altered the expressions of markers for the formation of cartilage and bone, such as osteocalcin, alkaline phosphatase (ALP), collagen II, and collagen X. Further, no formation of cartilage and bone was observed in the recombinant BMP-2-treated tongues based on Alizarin red and Alcian blue stainings. Neither recombinant BMP-2 nor BMP-2 siRNA affected the expression of inhibitor of DNA binding /differentiation 1 (Id1). The ratios of chondrogenic and osteogenic markers relative to glyceraldehyde-3-phosphate dehydrogenase (GAPDH, a house keeping gene) were approximately 1000-fold lower than those of myogenic markers in the cultured tongue. CONCLUSIONS: BMP-2 functions as a negative regulator for the final differentiation of tongue myoblasts, but not as an inducer for the formation of cartilage and bone in cultured tongue, probably because the genes related to myogenesis are in an activation mode, while the genes related to chondrogenesis and osteogenesis are in a silencing mode.

PMID 21736745

2009

Relationship between neural crest cells and cranial mesoderm during head muscle development

Grenier J, Teillet MA, Grifone R, Kelly RG, Duprez D. PLoS One. 2009;4(2):e4381. Epub 2009 Feb 9. PMID: 19198652

In vertebrates, the skeletal elements of the jaw, together with the connective tissues and tendons, originate from neural crest cells, while the associated muscles derive mainly from cranial mesoderm. Previous studies have shown that neural crest cells migrate in close association with cranial mesoderm and then circumscribe but do not penetrate the core of muscle precursor cells of the branchial arches at early stages of development, thus defining a sharp boundary between neural crest cells and mesodermal muscle progenitor cells. Tendons constitute one of the neural crest derivatives likely to interact with muscle formation. However, head tendon formation has not been studied, nor have tendon and muscle interactions in the head.

This results show that neural crest cells and muscle progenitor cells are more extensively mixed than previously believed during arch development. In addition, our results show that interactions between muscles and tendons during craniofacial development are similar to those observed in the limb, despite the distinct embryological origin of these cell types in the head.


http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0004381