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Biosynthetic Crossover of 5-Lipoxygenase and Cyclooxygenase-2 Yields 5-Hydroxy-PGE2 and 5-Hydroxy-PGD2
JACS Au ( IF 8.5 ) Pub Date : 2021-08-04 , DOI: 10.1021/jacsau.1c00177
Fumie Nakashima 1 , Takashi Suzuki 1 , Odaine N Gordon 1 , Dominic Golding 1 , Toshiaki Okuno 2 , Juan A Giménez-Bastida 1 , Takehiko Yokomizo 2 , Claus Schneider 1
Affiliation  

The biosynthetic crossover of 5-lipoxygenase (5-LOX) and cyclooxygenase-2 (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 degradation product, 5,12-dihydroxy-heptadecatri-6E,8E,10E-enoic acid, and by SnCl2-mediated reduction to 5-OH-PGF. Both 5-OH-PGE2 and 5-OH-PGD2 were unstable and degraded rapidly upon treatment with weak base. This instability hampered detection in biologic samples which was overcome by in situ reduction using NaBH4 to yield the corresponding stable 5-OH-PGF2 diastereomers and enabled detection of 5-OH-PGF in activated primary human leukocytes. 5-OH-PGE2 and 5-OH-PGD2 were unable to activate EP and DP prostanoid receptors, suggesting their bioactivity is distinct from PGE2 and PGD2.

中文翻译:


5-脂加氧酶和环加氧酶-2 的生物合成交叉产生 5-羟基-PGE2 和 5-羟基-PGD2



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 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 。 5-OH-PGE 2和5-OH-PGD 2不能激活EP和DP前列腺素受体,表明它们的生物活性不同于PGE 2和PGD 2
更新日期:2021-09-27
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