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Anatomy and Embryology

, Volume 211, Issue 6, pp 639–648 | Cite as

Myogenin (Myf4) upregulation in trans-differentiating fibroblasts from a congenital myopathy with arrest of myogenesis and defects of myotube formation

  • Claudia Weise
  • Fangping Dai
  • Felicitas Pröls
  • Uwe-Peter Ketelsen
  • Ulrike Dohrmann
  • Mathias Kirsch
  • Beate Brand-SaberiEmail author
Original Article

Abstract

Congenital myopathies often have an unclear aetiology. Here, we studied a novel case of a severe congenital myopathy with a failure of myotube formation. Polymerase chain reaction-based analysis was performed to characterize the expression patterns of the Desmin, p21, p57, and muscle regulatory factors (MRFs) MyoD, Myf4, Myf5 and Myf6 in differentiating skeletal muscle cells (SkMCs), normal human fibroblasts and patient-derived fibroblasts during trans-differentiation. The temporal and spatial pattern of MRFs was further characterized by immunocyto- and immunohistochemical stainings. In differentiating SkMCs, each MRF showed a characteristic expression pattern. Normal trans-differentiating fibroblasts formed myotubes and expressed all of the MRFs, which were detected. Interestingly, the patient’s fibroblasts also showed some fusion events during trans-differentiation with a comparable expression profile for the MRFs, particularly, with increased expression of Myf4 and p21. Immunohistochemical analysis of normal and patient-derived skeletal musculature revealed that Myf4, which is downregulated during normal fetal development, was still present in patient-derived skeletal head muscle, which was also positive for Desmin and sarcomeric actin. The abnormal upregulation of Myf4 and p21 in the patient who suffered from a severe congenital myopathy suggests that the regulation of Myf4 and p21 gene expression during myogenesis might be of interest for further studies.

Keywords

Congenital myopathy Myogenin(myf4) p21 Skeletal muscle development 

Notes

Acknowledgments

Many thanks are dedicated to Prof. Anna Starzinski-Powitz and Dr Andreas Zeitvogel of the University of Frankfurt/Main for technical advice in handling the patient’s fibroblast as well as to the Institute of Pathology of the University of Freiburg providing normal fetal skeletal muscle tissue. We also express our thanks to Lidia Koschny for her excellent technical assistance. We acknowledge the support of the MYORES project (511978), funded by the EC’s Sixth Framework Programme.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Claudia Weise
    • 1
  • Fangping Dai
    • 1
  • Felicitas Pröls
    • 1
  • Uwe-Peter Ketelsen
    • 2
  • Ulrike Dohrmann
    • 3
  • Mathias Kirsch
    • 4
  • Beate Brand-Saberi
    • 1
    Email author
  1. 1.Department of Molecular Embryology, Institute of Anatomy and Cell BiologyAlbert-Ludwigs-University FreiburgFreiburgGermany
  2. 2.Department of Neuropediatrics and Muscle Disorders, Neuromuscular PathologyAlbert-Ludwigs-University FreiburgFreiburgGermany
  3. 3.Institute for Human GeneticsAlbert-Ludwigs-University FreiburgFreiburgGermany
  4. 4.Department of Neuroanatomy, Institute of Anatomy and Cell BiologyAlbert-Ludwigs-University FreiburgFreiburgGermany

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