Differential Expression of Equine Myosin Heavy-chain mRNA and Protein Isoforms in a Limb Muscle
| Autor: | Arpna Kiri, Elizabeth G. Dingboom, Maarten M.M. van den Burg, Karin Eizema, Hans van Oudheusden, W.A. Weijs, Geoffrey Goldspink |
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| Rok vydání: | 2003 |
| Předmět: |
0301 basic medicine
Gene isoform Histology Molecular Sequence Data Muscle Fibers Skeletal macromolecular substances In situ hybridization Biology Polymerase Chain Reaction 03 medical and health sciences Myosin medicine Animals Protein Isoforms Amino Acid Sequence Horses RNA Messenger Muscle Skeletal Gene In Situ Hybridization Regulation of gene expression Messenger RNA Base Sequence Myosin Heavy Chains 030102 biochemistry & molecular biology Skeletal Muscle Myosins RNA Skeletal muscle Extremities musculoskeletal system Immunohistochemistry Molecular biology 030104 developmental biology medicine.anatomical_structure Anatomy tissues |
| Zdroj: | Journal of Histochemistry & Cytochemistry. 51:1207-1216 |
| ISSN: | 1551-5044 0022-1554 |
| DOI: | 10.1177/002215540305100911 |
| Popis: | The horse is one of the few animals kept and bred for its athletic performance and is therefore an interesting model for human sports performance. The regulation of the development of equine locomotion in the first year of life, and the influence of early training on later performance, are largely unknown. The major structural protein in skeletal muscle, myosin heavy-chain (MyHC), is believed to be primarily transcriptionally controlled. To investigate the expression of the MyHC genes at the transcriptional level, we isolated cDNAs encoding the equine MyHC isoforms type 1 (slow), type 2a (fast oxidative), and type 2d/x (fast glycolytic). cDNAs encoding the 2b gene were not identified. The mRNA expression was compared to the protein expression on a fiber-to-fiber basis using in situ hybridization (non-radioactive) and immunohistochemistry. Marked differences were detected between the expression of MyHC transcripts and MyHC protein isoforms in adult equine gluteus medius muscle. Mismatches were primarily due to the presence of hybrid fibers expressing two fast (2ad) MyHC protein isoforms, but only one fast (mainly 2a) MyHC RNA isoform. This discrepancy was most likely not due to differential mRNA expression of myonuclei. |
| Databáze: | OpenAIRE |
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