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Adaptive range of myosin heavy chain expression in regenerating soleus is broader than in mature muscleCvetko, Erika ...In adult rat muscles experimentally exposed to various patterns of activation, expression of myosin heavy chain isoforms changes, but only within a certain adaptive range. It is characteristic and ... different in fast or slow muscles. This may be due either to different intrinsic properties of the myogenic cells of the two types of muscles or to extrinsic factors. To test these assumptions, either rat soleus or extensor digitorum longus muscles were injured and transplanted to the bed of the extensor digitorum longus muscle. They regenerated and were reinnervated by the extensor digitorum longus nerve. Expression of myosin heavy chain isoforms was demonstrated immunohistochemically and by in situ hybridization, and analysed by SDS-gel electrophoresis. Three months after cross-transplantation, regenerated soleus expressed all adult myosin heavy chain isoforms, including the myosin heavy chain-2B. The latter was detected in about 50% of muscle fibres and contributed about 10-20% of all myosin heavy chains. The same percentage of myosin heavy chain-2B was found in regenerated extensor digitorum longus. In this regard therefore, the adaptive range of the regenerated soleus muscle was not significantly different from that of the extensor digitorum longus regenerating under the same conditions. This indicates that restriction of the adaptive range in a mature soleus muscle is not due to intrinsic properties of its myogenic cells. It is probably imposed by an extrinsic factor leading to irreversible shut-down of individual myosin heavy chain genes. On the other hand, myosin heavy chain-1 expression was significantly grater in the regenerated soleus than in the extensor digitorum longus extensor digitorum longus innervated by the same nerve. Myosin heavy chain-1 and myosin heavy chain-2B were co-expresed in some regenerated soleus muscle fibres.Source: Journal of muscle research and cell motility. - ISSN 0142-4319 (Letn. 17, št. 4, 1996, str. 401-409)Type of material - article, component partPublish date - 1996Language - englishCOBISS.SI-ID - 4677081
Author
Cvetko, Erika |
Smerdu, Vika |
Sketelj, Janez |
Dolenc, Igor, zdravnik, 1957- |
D'Albis, A... |
Janmot, C... |
Eržen, Ida
Topics
Muscle, skeletal |
Myosin heavy chains |
Immunohistochemistry |
In situ hybridization |
Rats |
Animals, laboratory |
Adult |
Muscle denervation |
Muscles |
Transplantation
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source: Journal of muscle research and cell motility. - ISSN 0142-4319 (Letn. 17, št. 4, 1996, str. 401-409)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Cvetko, Erika | 10644 |
Smerdu, Vika | 10641 |
Sketelj, Janez | 04412 |
Dolenc, Igor, zdravnik, 1957- | 11708 |
Eržen, Ida | 05329 |
Source: Personal bibliographies
and: SICRIS
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