Normal transitions in synthesis of replacement histones H2A.Z and H3.3 during differentiation of dystrophic myotube cells. A brief note. Mech Ageing Dev 1991 Jun 28;59(3):299-305
Date
06/28/1991Pubmed ID
1921519DOI
10.1016/0047-6374(91)90140-uScopus ID
2-s2.0-0025912482 (requires institutional sign-in at Scopus site) 9 CitationsAbstract
We previously reported that differentiating G0 myotube cells cultured from normal chicken embryos exhibit a histone synthesis pattern that is highlighted by transitions in the expression of the minor replacement variants H3.3 and perhaps H2A.Z (Wunsch and Lough, Dev. Biol. 119 (1987) 94-99). Because these proteins may be synthesized to maintain chromatin structure during the differentiation and maturation of the skeletal muscle fiber, it was of interest to determine whether they are made at normal levels during the differentiation of dystrophic muscle. To this end, the synthesis of histone proteins in cultured myoblasts and myotubes from normal and dystrophic avian embryos has been characterized by two-dimensional polyacrylamide gel electrophoresis and fluorography. Proliferating myoblasts (day 1) as well as two stages of differentiating myotubes (days 3, 4) exhibited histone synthesis patterns that were indistinguishable when comparing normal and dystrophic cells. It is noteworthy that this study also revealed that, in both cell types, the change in H2A.Z synthesis during the myoblast/myotube transition was remarkable, increasing from approximately 20% of the non-ubiquitinated H2As in myoblasts to 80% in myotubes. Also, gel staining patterns and immunoblotting detected no differences in the degree of histone ubiquitination between normal and dystrophic cells. These findings indicate that, up to this point in dystrophic differentiation, neither the synthesis nor ubiquitination of histones are perturbed.
Author List
Wunsch AM, Reinhardt K, Lough JAuthor
John W. Lough PhD Professor in the Cell Biology, Neurobiology and Anatomy department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AnimalsCell Differentiation
Cell Division
Cells, Cultured
Fetus
Genetic Variation
Histones
Muscles
Muscular Dystrophy, Animal
Reference Values
Time Factors