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Formation of phosphatidic acid and subclasses of phosphatidylethanol in human neutrophils upon interleukin-8 stimulation.

机译:白细胞介素8刺激后,人嗜中性粒细胞中磷脂酸和磷脂酰乙醇亚类的形成。

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Previous studies showed that interleukin-8 (IL-8) stimulates phospholipase D hydrolysis of phosphatidylcholine to generate phosphatidic acid in human neutrophils. Phosphatidylcholine in these cells contains diacyl, alkylacyl and alkenylacyl subclasses. No studies have examined phospholipase D hydrolysis of the three subclasses of phosphatidylcholine in interleukin-8-stimulated neutrophils. We used a non-radioactive but very sensitive method to assess the relative distribution of the subclasses in phosphatidylethanol, which is derived from phospholipase D activity in ethanol-exposed neutrophils. We present evidence that the relative abundance of diacyl and alkylacyl subclasses in phosphatidylethanol is similar to that in phosphatidylcholine. Alkenylacyl subclass was also detectable in the phosphatidylethanol fraction, albeit as a minor subclass. Our findings suggest that phospholipase D catalyses the hydrolysis of diacyl, alkylacyl and alkenylacyl subclasses of phosphatidylcholine in neutrophils upon IL-8 stimulation.
机译:先前的研究表明,白细胞介素8(IL-8)刺激磷脂酰胆碱的磷脂酶D水解,从而在人的中性粒细胞中产生磷脂酸。这些细胞中的磷脂酰胆碱含有二酰基,烷基酰基和烯基酰基亚类。没有研究检查白介素8刺激的中性粒细胞中磷脂酰胆碱的三个亚类的磷脂酶D水解。我们使用了一种非放射性但非常敏感的方法来评估磷脂酰乙醇中这些亚类的相对分布,这是从暴露于乙醇的中性粒细胞中的磷脂酶D活性得出的。我们目前的证据表明,磷脂酰乙醇中二酰基和烷基酰基亚类的相对丰度类似于磷脂酰胆碱中的相对丰度。磷脂酰乙醇馏分中也可检测到烯丙酸亚类,尽管它是次要亚类。我们的发现表明,磷脂酶D在IL-8刺激下可催化嗜中性粒细胞中磷脂酰胆碱的二酰基,烷基酰基和链烯基酰基亚类的水解。

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