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© Research
Publication : Developmental biology

Changes in ganglioside metabolism during in vitro differentiation of quail embryo myoblasts

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Developmental biology - 01 Oct 1984

Dubois C, Hauttecoeur B, Coulon-Morelec MJ, Montarras D, Rampini C, Fiszman MY

Link to Pubmed [PMID] – 6479448

Dev. Biol. 1984 Oct;105(2):509-17

The metabolism of gangliosides was studied during the in vitro differentiation of both normal quail myoblasts and myoblasts which have been transformed by a temperature-sensitive mutant of Rous sarcoma virus (RSV). These transformed cells can be maintained undifferentiated if incubated at 35 degrees C, but they will differentiate when shifted to 41 degrees C. (D. Montarras and M. Y. Fiszman (1983) J. Biol. Chem. 258, 3882-3888). The analysis of [14C]Glucosamine-labeled gangliosides by two-dimensional thin-layer chromatography reveals variations in the metabolism of the gangliosides during the process of differentiation. During the formation of myotubes, it was observed that the accumulation of GD1a is reduced, while the accumulation of GD3 is increased. Therefore, this results in the variation of the ratio GD3/GD1a which increases from 1.8 to 25 in the case of clones of transformed myoblasts, and from 0.5 to 1.7 in the case of uninfected myoblasts. These variations which have been observed seem to be specific of the myogenic differentiation since they cannot be reproduced when differentiation is inhibited by BUdR treatment or when fibroblasts reach confluency and are blocked in the G1 phase of cell cycle. Furthermore, the transformed myoblasts in vitro are shown to be a good model system since their gangliosides composition is very similar to that of muscle cells in vivo.

http://www.ncbi.nlm.nih.gov/pubmed/6479448