Glycolipid sialyltransferases are enhanced during neural differentiation of mouse embryonic carcinoma cells, P19.
Glycolipid sialyltransferases are enhanced during neural differentiation of mouse embryonic carcinoma cells, P19.
复制标题
糖脂唾液酸转移酶在小鼠胚胎癌细胞 P19 的神经分化过程中增强。
DOI：
10.1006/bbrc.1997.7817
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Y. Sanai
中科院分区：
文献类型：
--
作者：
T. Osanai;Y. Watanabe;Y. Sanai
We have studied ganglioside alterations and their enzymatic basis during the course of neural differentiation of mouse embryonic carcinoma cell line P19. This cell line can differentiate into neurons and astrocytes on cell aggregation after treatment with retinoic acid (RA) or into muscle cells on dimethyl sulfoxide (DMSO) treatment. GD3, detected on immunostaining after thin-layer chromatography (TLC) with monoclonal antibody (MAb) R24, was markedly present in aggregates treated with RA. GM3 synthase (alpha 2,3-sialyltransferase, SAT-I) in neurons was found to exhibit the highest activity. GD3 synthase (alpha 2,8-sialyltransferase, SAT-II) and GD3 synthase mRNA, as analyzed by Northern blotting, were also markedly present in aggregates and neurons induced by RA. However, on treatment with DMSO, which induces muscle cells, there was no change in the level of GD3 synthase activity, and its transcript was hardly detected during the course of muscle differentiation. GT1b synthase (alpha 2,3-sialyltransferase, SAT-IV) was present at similar levels in undifferentiated cells and aggregates treated with RA, but a higher level was observed in neurons. On the other hand, the level of GQ1b synthase (alpha 2,8-sialyltransferase, SAT-V) in RA-induced aggregates was significantly higher than that in neurons. These results show that RA but not DMSO induces the expression of GM3, GD3, GT1b and GQ1b synthases, and particularly GD3 synthase mRNA, in the ganglioside biosynthetic pathway during the neural differentiation of embryonic carcinoma P19 cells.
