Polyunsaturated monoglycerides and a pregnadiene in defensive glands of the water beetle Agabus affinis

被引：10

作者：

Schaaf, O ^{[1
]}

Dettner, K ^{[1
]}

机构：

[1] Univ Bayreuth, Dept Anim Ecol 2, D-95440 Bayreuth, Germany

来源：

LIPIDS | 2000年 / 35卷 / 05期

关键词：

D O I：

10.1007/s11745-000-554-6

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In addition to the C-21 steroid 15 alpha-hydroxy-pregna-4, 6-dien-3,20-dione, four 1- or 2-acylated polyunsaturated monoglycerides, 1- or 2-(cis-5,8,11,14-eicosatetraenoyl)- glycerol and 1- or 2-(cis-5,8,11,14,17-eicosapentaenoyl)glycerol were identified as constituents of the prothoracic defensive gland secretion of the dytiscid beetle Agabus affinis by gas chromatography-mass spectrometry of trimethylsilylated gland extracts. In a feeding assay with minnows, synthetic samples of the two 2-acylated monoglycerides showed only a weak activity as a feeding deterrent. For that reason, other possible functions of the monoglycerides are discussed, such as roles as emulsifiers of cannabimimetics.

引用

页码：543 / 550

页数：8