3′-Azidothymidine (Zidovudine) Inhibits Glycosylation and Dramatically Alters Glycosphingolipid Synthesis in Whole Cells at Clinically Relevant Concentrations (*)
3′-Azidothymidine (Zidovudine) Inhibits Glycosylation and Dramatically Alters Glycosphingolipid Synthesis in Whole Cells at Clinically Relevant Concentrations (*)
复制标题
3-叠氮胸苷 (Zidovudine) 在临床相关浓度下抑制糖基化并显着改变全细胞中的鞘糖脂合成 (*)
DOI:
--
复制
发表时间:
1995
影响因子:
4.8
通讯作者:
Paul Melan¸on
中科院分区:
文献类型:
--
作者:
Jian;D. Ilsley;Corinne Frohlick;R. Steet;E. T. Hall;R. Kuchta;Paul Melan¸on
Recent in vitro work with Golgi-enriched membranes showed that 3′-azidothymidine-5′-monophosphate (AZTMP), the primary intracellular metabolite of 3′-azidothymidine (AZT), is a potent inhibitor of glycosylation reactions (Hall et al.(1994) J. Biol. Chem. 269, 14355-14358) and predicted that AZT treatment of whole cells should cause similar inhibition. In this report, we verify this prediction by showing that treatment of K562 cells with AZT inhibits lipid and protein glycosylation. AZT treatment dramatically alters the pattern of glycosphingolipid biosynthesis, nearly abolishing ganglioside synthesis at clinically relevant concentrations (1-5 μM), and suppresses the incorporation of both sialic acid and galactose into proteins. Control experiments demonstrate that these changes do not result from nonspecific effects on either the secretory apparatus or protein synthesis. On the other hand, studies using isolated nuclei as a model system for chromosomal DNA replication show that AZTTP is a very weak inhibitor of DNA synthesis. These observations strongly suggest that the myelosuppressive effects of AZT in vivo are due to inhibition of protein and/or lipid glycosylation and not to effects on chromosomal DNA replication.
登录
查看更多内容
影响因子:
20.3
作者:
Kannagi,R;Papayannopoulou,T;Nakamoto,B;Cochran,NA;Yokochi,T;Stamatoyannopoulos,G;Hakomori,S
通讯作者:
Hakomori,S
DOI:
10.1016/s0021-9258(18)68785-x
发表时间:
1988-05
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
N. Hanai;T. Dohi;G. Nores;S. Hakomori
通讯作者:
N. Hanai;T. Dohi;G. Nores;S. Hakomori
DOI:
10.1073/pnas.79.15.4540
发表时间:
1982-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
ELDER, JH;ALEXANDER, S
通讯作者:
ALEXANDER, S
DOI:
10.1073/pnas.91.2.728
发表时间:
1994-01-18
影响因子:
11.1
作者:
IOFFE, E;STANLEY, P
通讯作者:
STANLEY, P
DOI:
10.1016/s0021-9258(17)39801-0
发表时间:
1984-06
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
E. Bremer;S. Hakomori;D. Bowen-Pope;E. Raines;R. Ross
通讯作者:
E. Bremer;S. Hakomori;D. Bowen-Pope;E. Raines;R. Ross