Studies on the mechanism of omega-hydroxylation of platelet 12-hydroxyeicosatetraenoic acid (12-HETE) by unstimulated neutrophils.
Studies on the mechanism of omega-hydroxylation of platelet 12-hydroxyeicosatetraenoic acid (12-HETE) by unstimulated neutrophils.
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未刺激的中性粒细胞对血小板 12-羟基二十碳四烯酸 (12-HETE) 的 omega-羟基化机制的研究。
DOI:
10.1172/jci112781
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发表时间:
1987
期刊:
影响因子:
--
通讯作者:
vonSchacky,C
中科院分区:
文献类型:
--
作者:
Marcus,AJ;Safier,LB;Ullman,HL;Islam,N;Broekman,MJ;vonSchacky,C
Stimulated platelets, in the presence or absence of aspirin, synthesize significant quantities of 12-hydroxyeicosatetraenoic acid (12-HETE), which is chemotactic and chemokinetic, and enhances mononuclear cell procoagulant activity. During a cell-cell interaction between stimulated platelets and unstimulated neutrophils, platelet 12-HETE is metabolized to 12,20-dihydroxyeicosatetraenoic acid (12,20-DiHETE) by neutrophils. Characteristics of the enzyme system in unstimulated neutrophils responsible for this omega-hydroxylation were investigated. A broad range of cytochrome P-450 inhibitors, as well as leukotriene B4, blocked formation of 12,20-DiHETE. Owing largely to released proteases, neutrophil homogenization abolished activity. Pretreatment with diisopropylfluorophosphate preserved activity in neutrophil homogenates. omega-Hydroxylation of 12-HETE was confined solely to the microsomal fraction. Specific activity increased 6.6-fold compared with neutrophil sonicates. The electron donor NADPH was a required cofactor. These results indicate that the enzyme in unstimulated human neutrophils, which metabolizes 12-HETE from stimulated platelets to 12,20-DiHETE in this cell-cell interaction, is a cytochrome P-450 monooxygenase.
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DOI:
--
发表时间:
1986
期刊:
Progress in clinical and biological research
影响因子:
--
作者:
Fujita,M;Spray,DC;Choi,H;Saez,J;Jefferson,DM;Hertzberg,E;Rosenberg,LC;Reid,LM
通讯作者:
Reid,LM
影响因子:
19.6
作者:
A. Evan;K. Gardner;J. Bernstein
通讯作者:
J. Bernstein
DOI:
--
发表时间:
1988
期刊:
The American journal of pathology
影响因子:
--
作者:
Carone,FA;Makino,H;Kanwar,YS
通讯作者:
Kanwar,YS
影响因子:
19.6
作者:
Karen Mackay;L. Striker;Carl A. Pinkert;Ralph L. Brinster;G. E. Striker
通讯作者:
Karen Mackay;L. Striker;Carl A. Pinkert;Ralph L. Brinster;G. E. Striker
DOI:
10.1136/bmj.292.6524.851
发表时间:
1986
期刊:
British Medical Journal (Clinical research ed.)
影响因子:
--
作者:
S. Reeders;M. Breuning;G. Corney;S. Jeremiah;P. Meera Khan;K. Davies;D. Hopkinson;P. Pearson;D. Weatherall
通讯作者:
D. Weatherall