Fatty acid composition of ganglioside GM3 of renal glomerular epithelial SGE1 cells during spontaneous dome formation in vitro.
Ganglioside GM3, one of acidic components of membrane glycosphingolipids (GSL), has been known to change its content quantitatively during growth and differentiation of various cells in vitro. Detailed analysis of lipid portion of GM3 of rat renal glomerular SGE1 cells revealed that fatty acids with long carbon chains, especially that of C24:0 and C24:1 increased, while that of short C18:0 and C20:0 decreased after spontaneous dome formation. Since not only fatty acid composition of neutral GSL, sulfatide and phospholipid but also composition of long-chain bases (LCB) did not change, it was suggested that only C24 fatty acid of GM3 specifically increased in relation to dome formation. The spontaneous dome formation has been reported to be related with induction of cellular differentiation in many transporting epithelial cells. We thus assume that the change of fatty acid composition of GM3 is involved in cellular differentiation of SGE1 cells.
Division of Molecular and Cell Biology, Shigei Medical Research Institute, Okayama, Japan.
Y
Y
Tomono
C
C
Moritoh
T
T
Yasuda
T
T
Okigaki
D000818:Animals; D002454:Cell Differentiation; D002478:Cells, Cultured; D004847:Epithelial Cells; D004848:Epithelium / Q000378:metabolism; D005227:Fatty Acids / Q000032:analysis*; D005679:G(M3) Ganglioside / Q000378:metabolism*; D007678:Kidney Glomerulus / Q000166:cytology / Q000378:metabolism*; D010743:Phospholipids / Q000032:analysis; D051381:Rats
D005227:Fatty Acids; D005679:G(M3) Ganglioside; D010743:Phospholipids