Antioxidant protection of lipoproteins containing estrogens: in vitro evidence for low- and high-density lipoproteins as estrogen carriers.
Antioxidant protection of lipoproteins containing estrogens: in vitro evidence for low- and high-density lipoproteins as estrogen carriers.
复制标题
含有雌激素的脂蛋白的抗氧化保护:低密度和高密度脂蛋白作为雌激素载体的体外证据。
DOI:
10.1016/s1388-1981(99)00108-0
复制
发表时间:
1999
期刊:
影响因子:
--
通讯作者:
Tikkanen,MJ
中科院分区:
文献类型:
--
作者:
Meng,QH;Höckerstedt,A;Heinonen,S;Wähälä,K;Adlercreutz,H;Tikkanen,MJ
Some recent studies have reported that low-density lipoprotein (LDL) isolated from estrogen-treated postmenopausal women exhibited increased oxidation resistance ex vivo. However, the underlying mechanisms responsible for this effect are not clear. We explored the possibility that lipophilic derivatives of 17β-estradiol (E2) could be incorporated into LDL and high-density lipoprotein (HDL) particles inhibiting lipoprotein oxidation. Introduction of small amounts of esterified E2into lipoproteins by means of incubation of free E2and E217-stearate in plasma did not result in any antioxidant effect. Using an artificial transfer system (Celite dispersion), larger amounts of E2esters could be incorporated into lipoproteins. Concentrations ranging between 0.27 and 1.38 molecules/LDL particle for E217-stearate and between 0.36 and 1.93 molecules/LDL particle for E217-oleate resulted in increased Cu2+-induced oxidation resistance of LDL as indicated by statistically significant lag time prolongations. Significant prolongations of lag times were also observed for HDL following incorporation of E2esters using Celite as transfer system. Our results suggest that free E2can be esterified and incorporated into lipoproteins during incubation in plasma. However, incorporation of supraphysiologic concentrations of E2esters into lipoproteins by means of the artificial transfer system was required in order to reduce their oxidation susceptibility.
登录
查看更多内容
影响因子:
5.3
作者:
Shwaery,GT;Vita,JA;KeaneyJr,JF
通讯作者:
KeaneyJr,JF
DOI:
--
发表时间:
1987
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
M. Nakano;K. Sugioka;I. Naito;S. Takekoshi;E. Niki
通讯作者:
E. Niki
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Mellon-Nussbaum,SH;Ponticorvo,L;Schatz,F;Hochberg,RB
通讯作者:
Hochberg,RB
影响因子:
6.7
作者:
Wilcox,JG;Hwang,J;Hodis,HN;Sevanian,A;Stanczyk,FZ;Lobo,RA
通讯作者:
Lobo,RA
影响因子:
20.3
作者:
Hochberg,RB
通讯作者:
Hochberg,RB