Biosynthetic Crossover of 5-Lipoxygenase and Cyclooxygenase-2 Yields 5-Hydroxy-PGE<sub>2</sub> and 5-Hydroxy-PGD<sub>2</sub>
作者:Fumie Nakashima、Takashi Suzuki、Odaine N. Gordon、Dominic Golding、Toshiaki Okuno、Juan A. Giménez-Bastida、Takehiko Yokomizo、Claus Schneider
DOI:10.1021/jacsau.1c00177
日期:2021.9.27
(COX-2) enzymatic activities is a productive pathway to convert arachidonic acid into unique eicosanoids. Here, we show that COX-2 catalysis with 5-LOX derived 5-hydroxy-eicosatetraenoic acid yields the endoperoxide 5-hydroxy-PGH2 that spontaneously rearranges to 5-OH-PGE2 and 5-OH-PGD2, the 5-hydroxy analogs of arachidonic acid derived PGE2 and PGD2. The endoperoxide was identified via its predicted
5-脂氧合酶 (5-LOX) 和环氧合酶-2 (COX-2) 酶活性的生物合成交叉是将花生四烯酸转化为独特的类二十烷酸的有效途径。在这里,我们表明 COX-2 催化 5-LOX 衍生的 5-羟基-二十碳四烯酸产生内过氧化物 5-羟基-PGH 2 ,它自发重排为 5-OH-PGE 2和 5-OH-PGD 2 ,即 5-OH-PGD 2 。花生四烯酸衍生的PGE 2和PGD 2的羟基类似物。内过氧化物通过其预测的降解产物5,12-二羟基-十七-6 E ,8 E ,10 E -烯酸以及SnCl 2介导的5-OH-PGF 2α还原来鉴定。 5-OH-PGE 2和5-OH-PGD 2均不稳定并且在弱碱处理后迅速降解。这种不稳定性阻碍了生物样品中的检测,通过使用 NaBH 4原位还原产生相应的稳定 5-OH-PGF 2非对映异构体克服了这种不稳定性,并能够在活化的原代人白细胞中检测 5-OH-PGF 2α