Abstract
To investigate the in vitro development of myofibrils in skeletal muscle cells derived from adult human muscle biopsies, immunohistochemical analysis was performed using monoclonal antibodies against desmin, titin, and nebulin. Diffuse desmin reactivity was detected 48 h after plating in about 60% of all mononucleated cells. This supports the use of desmin as a marker for undifferentiated rhabdomyosarcomas in man. Titin was visible from day 4 onwards, while nebulin was not found in mononucleated cells. After 1 week polynucleated myotubes appeared, and grew up to 30 days. Desmin was distributed diffusely throughout the cytoplasm until day 21, when the pattern became patchy. Titin began to be organized in a predominantly longitudinal orientation at day 15, while nebulin, which appeared for the first time in fusing myoblasts on the fifth to the seventh day, was almost immediately organized in a dotted longitudinal pattern, which became a Z line connected striation in matured myotubes.
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Abbreviations
- FCS:
-
fetal calf serum
- mAb:
-
monoclonal antibody
- TBS:
-
Tris-buffered saline
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Correspondence to: T. Behr
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Behr, T., Fischer, P., Müller-Felber, W. et al. Myofibrillogenesis in primary tissue cultures of adult human skeletal muscle: expression of desmin, titin, and nebulin. Clin Investig 72, 150–155 (1994). https://doi.org/10.1007/BF00184594
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DOI: https://doi.org/10.1007/BF00184594