ATP‐dependent leukotriene export from mastocytoma cells

ATP‐dependent leukotriene export from mastocytoma cells
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肥大细胞瘤细胞的 ATP 依赖性白三烯输出

DOI:
10.1016/0014-5793(91)80256-3
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发表时间:
1991
期刊:
影响因子:
3.5
通讯作者:
D. Keppler
D. Keppler
中科院分区:
生物学3区
文献类型:
--
作者:
T. Schaub;T. Ishikawa;D. Keppler

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白三烯(LT)C4和B4的生物合成之后,这些介质输出到细胞外空间。使用从肥大细胞瘤细胞制备的质膜囊泡表征这种转运,并将其鉴定为ATP依赖性主要活性过程。LTC 4的表观Km值为110 nM,ATP的表观Km值为48 μM。在10 nM浓度下,LTC 4的转运率最高,而LTD 4、LTE 4和N-乙酰基-LTE 4的转运率分别为31%、12%和8%。LTB 4转运也依赖于ATP,LTC 4转运受到LTD 4受体拮抗剂(MK-571的IC 10 = 1.0 μM,LY 245769的IC 10 = 1.3 μM)和白三烯生物合成抑制剂MK-886(IC 10 = 1.8 μM)的抑制。在白三烯合成细胞中的白三烯的ATP依赖性输出载体代表ATP依赖性出口泵家族的新成员。
The biosynthesis of leukotrienes (LT) C4and B4is followed by an export of these mediators into the extracellular space. This transport was characterized using plasma membrane vesicles prepared from mastocytoma cells and identified as an ATP‐dependent primary active process. The apparentKm‐values were 110 nM for LTC4and 48 μM for ATP. The transport rate was highest for LTC4, whereas LTD4, LTE4, andN‐acetyl‐LTE4were transported with relative rates of 31, 12 and 8%, respectively, at a concentation of 10nM. LTB4transport was also dependent on ATP, LTC4transport with inhibited by LTD4receptor antagonists (IC10= 1.0 μM for MK‐571 and 1.3 μM for LY245769) and by the inhibitor of leukotriene biosynthesis MK‐886 (IC10= 1.8 μM). The ATP‐dependent export carrier for leukotrienes in leukotriene‐synthesizing cells represents a novel member of the family of ATP‐dependent exit pumps.
DOI: --
发表时间: 1990
期刊: The Journal of biological chemistry
影响因子: --
作者:
Lam,BK;Gagnon,L;Austen,KF;Soberman,RJ
通讯作者: Soberman,RJ
人嗜酸性粒细胞生物合成白三烯 C4 后独特的输出步骤的鉴定。
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
Lam,BK;OwenJr,WF;Austen,KF;Soberman,RJ
通讯作者: Soberman,RJ