Tags

Type your tag names separated by a space and hit enter

Sonic Hedgehog induces proliferation of committed skeletal muscle cells in the chick limb.
Development. 1998 Feb; 125(3):495-505.D

Abstract

Myogenic Regulatory Factors (MRFs) are a family of transcription factors whose expression in a cell reflects the commitment of this cell to a myogenic fate before any cytological sign of muscle differentiation is detectable. Myogenic cells in limb skeletal muscles originate from the lateral half of the somites. Cells that migrate away from the lateral part of the somites to the limb bud do not initially express any member of the MRF family. Expression of MRFs in the muscle precursor cells starts after the migration process is completed. The extracellular signals involved in activating the myogenic programme in muscle precursor cells in the limb in vivo are not known. We wished to investigate whether Sonic Hedgehog (SHH) expressed in the posterior part of the limb bud could be involved in differentiation of the muscle precursor cells in the limb. We found that retrovirally overexpressed SHH in the limb bud induced the extension of the expression domain of the Pax-3 gene, then that of the MyoD gene and finally that of the myosin protein. This led to an hypertrophy of the muscles in vivo. Addition of SHH to primary cultures of myoblasts resulted in an increase in the proportion of myoblasts that incorporate bromodeoxyuridine, resulting in an increase of myotube number. These data show that SHH is able to activate myogenesis in vivo and in vitro in already committed myoblasts and suggest that the stimulation of the myogenic programme by SHH involves activation of cell proliferation.

Authors+Show Affiliations

Institut d'Embryologie Cellulaire et Moléculaire du CNRS et du College de France, Nogent Sur Marne. Duprez@infobiogen.frNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9425144

Citation

Duprez, D, et al. "Sonic Hedgehog Induces Proliferation of Committed Skeletal Muscle Cells in the Chick Limb." Development (Cambridge, England), vol. 125, no. 3, 1998, pp. 495-505.
Duprez D, Fournier-Thibault C, Le Douarin N. Sonic Hedgehog induces proliferation of committed skeletal muscle cells in the chick limb. Development. 1998;125(3):495-505.
Duprez, D., Fournier-Thibault, C., & Le Douarin, N. (1998). Sonic Hedgehog induces proliferation of committed skeletal muscle cells in the chick limb. Development (Cambridge, England), 125(3), 495-505.
Duprez D, Fournier-Thibault C, Le Douarin N. Sonic Hedgehog Induces Proliferation of Committed Skeletal Muscle Cells in the Chick Limb. Development. 1998;125(3):495-505. PubMed PMID: 9425144.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sonic Hedgehog induces proliferation of committed skeletal muscle cells in the chick limb. AU - Duprez,D, AU - Fournier-Thibault,C, AU - Le Douarin,N, PY - 1998/1/13/pubmed PY - 1998/1/13/medline PY - 1998/1/13/entrez SP - 495 EP - 505 JF - Development (Cambridge, England) JO - Development VL - 125 IS - 3 N2 - Myogenic Regulatory Factors (MRFs) are a family of transcription factors whose expression in a cell reflects the commitment of this cell to a myogenic fate before any cytological sign of muscle differentiation is detectable. Myogenic cells in limb skeletal muscles originate from the lateral half of the somites. Cells that migrate away from the lateral part of the somites to the limb bud do not initially express any member of the MRF family. Expression of MRFs in the muscle precursor cells starts after the migration process is completed. The extracellular signals involved in activating the myogenic programme in muscle precursor cells in the limb in vivo are not known. We wished to investigate whether Sonic Hedgehog (SHH) expressed in the posterior part of the limb bud could be involved in differentiation of the muscle precursor cells in the limb. We found that retrovirally overexpressed SHH in the limb bud induced the extension of the expression domain of the Pax-3 gene, then that of the MyoD gene and finally that of the myosin protein. This led to an hypertrophy of the muscles in vivo. Addition of SHH to primary cultures of myoblasts resulted in an increase in the proportion of myoblasts that incorporate bromodeoxyuridine, resulting in an increase of myotube number. These data show that SHH is able to activate myogenesis in vivo and in vitro in already committed myoblasts and suggest that the stimulation of the myogenic programme by SHH involves activation of cell proliferation. SN - 0950-1991 UR - https://www.unboundmedicine.com/medline/citation/9425144/Sonic_Hedgehog_induces_proliferation_of_committed_skeletal_muscle_cells_in_the_chick_limb_ L2 - http://dev.biologists.org/cgi/pmidlookup?view=long&pmid=9425144 DB - PRIME DP - Unbound Medicine ER -