Porphyromonas gingivalis, a recognized periodontal pathogen, is a source of sphinganine bases, fatty acids, free ceramides as well as complex lipids that potentiate interleukin-1b-mediated secretory responses in gingival fibroblasts. The purpose of this study is the structural verification of the sphinganine bases and fatty acids that had been proposed as major components of the complex lipids found in P. gingivalis. The putative C17, C18, and C19 sphinganine bases were prepared from Garner's aldehyde (1) or from a protected serine Weinreb's amide (2). We confirmed that isobranched sphinganine bases are the major structural feature of the ceramides observed from P. gingivalis. We also prepared a C17 unsaturated fatty acid, along with an isobranched C17 3-hydroxy fatty acid, and determined that the major component of the active lipids was the latter.
牙龈
卟啉单胞菌(Porphyromonas gingivalis),一种公认的牙周病原体,是产生
丝氨酸基础、
脂肪酸、游离神经酰胺以及增强牙龈成纤维细胞中白细胞介素-1β介导的分泌反应的复杂脂质的来源。本研究旨在对先前提出的作为牙龈
卟啉单胞菌中发现的复杂脂质主要成分的
丝氨酸基础和
脂肪酸进行结构验证。假定的C17、C18和C19
丝氨酸基础从Garner醛(1)或从保护的
丝氨酸Weinreb酰胺(2)中制备。我们确认等分支
丝氨酸基础是来自牙龈
卟啉单胞菌的神经酰胺观察到的主要结构特征。我们还制备了C17不饱和
脂肪酸和一个等分支的C17 3-羟基
脂肪酸,并确定活性脂质的主要成分是后者。