A tetracosatetraene as larvicidal compound isolated from Alpinia katsumadai

作者：Hwang Ki Seon; Kim Young Kook; Kim Young Tae; Lee Joongku; Park Kee Woong^*

来源：Industrial Crops and Products, 2017, 109: 786-789.

DOI：10.1016/j.indcrop.2017.09.031

• Alpinia katsumadai
• Larvicides
• Plutella xylostella L.
• Mythimna separate
• 2,3,22,23-tertrahydroxy-2,6,10,15,19,23-hexamethy1-6,10,14,18-tetracosat etraene

Plutella xylostella and Mythimna separata are destructive insect pests causing damages to agricultural products. In this study, a larvicidal compound was identified by bioassay-guided isolation of methanol extracts of Alpinia katsumadai Hayata, a plant belonging to the Zingiberaceae, against P. xylostella and M. separata larvae. Because many insects, including P. xylostella and M. separate larvae, cannot synthesize sterols, they use phytosterols by converting them to the sterols necessary for hormonopoiesis, and resulting normal development, growth and reproduction. Results of our oil droplet formation test showed that compound 1 inhibited foam cell formation in ox-LDL treated THP-1 cells, suggesting that this compound may be inhibiting the sterol transport in insects. The compound 1 with larvicidal activity was elucidated by spectroscopic analysis (H-1 NMR, C-13 NMR, and ESI-MS) as 2,3,22,23-tertrahydroxy-2,6,10,15,19,23-hexamethyl-6,10,14,18- tetracosatetraene. The 50% lethal concentration (LC50) values of compound 1 were 2 mu g/mL and 16.9 mu g/mL, respectively, against P. xylostella and M. separata larvae.

• 出版日期2017-12-15