Myoblasts transferred to the limbs of embryos are committed to specific fibre fates (original) (raw)

Nature volume 362, pages 165–167 (1993)Cite this article

Abstract

IN the limb bud of the 5-day-old avian embryo, when primary muscle fibre formation is beginning and before specific muscles appear, differences in the expression of fast and slow myosin heavy chain genes can be detected among primary fibres of the premuscle masses1,2. Myoblasts that form colonies of fibres of specific types can be isolated from these limb buds3. To assess the role of myoblast commitment in specifying fibre types during embryonic development, we cloned myoblasts of specific types from embryonic and adult muscles, transfected them with a reporter gene, and transferred them into developing limb buds. After transfer, cloned myoblastsF formed fibres in the limb with the same patterns of myosin heavy chain gene expression as the fibres they formed in cell culture. These results demonstrate that initial skeletal muscle fibre type diversity during avian limb development can originate, in part, from the commitment of distinct myoblast types to the formation of specific fibre types.

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Authors and Affiliations

  1. Stanford University School of Medicine, Stanford, California, 94305-5306, USA
    Joseph X. DiMario, Susan E. Fernyak & Frank E. Stockdale

Authors

  1. Joseph X. DiMario
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  2. Susan E. Fernyak
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  3. Frank E. Stockdale
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DiMario, J., Fernyak, S. & Stockdale, F. Myoblasts transferred to the limbs of embryos are committed to specific fibre fates.Nature 362, 165–167 (1993). https://doi.org/10.1038/362165a0

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