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Chinese Journal of Mycology 2014, Vol. 9  Issue (1): 16-19.

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The use of a method for determining the levels of cellular phosphatidic acid in detecting the Aspergillus fumigatus activating phospholipase D activity in pulmonary epithelial cells

WANG Shuo1, HAN Xue-lin2, GAO Huan2, ZONG Hao1, HAN Li2   

  1. 1. College of Life Science, Sichuan Normal University, Chengdu 610101, China;
    2. Center for Hospital Infection Control, CDC of PLA, Beijing 100071, China
  • Received:2013-11-21 Online:2014-02-28 Published:2014-02-28

Abstract: Objective To establish a method to detect Phospholipase D (PLD) activity in the A549 cells stimulated by A.fumigatus by measuring the levels of cellular phosphatidic acid (PA).Method Using the interaction model of epithelial cells stimulated by A.fumigatus ATCC13073;Chloroform-methanol method was used to extrat the intracellular lipid. A modified method was established to measure PA standard and the levels of cellular PA.Results The calibration curve of PA standard was linear between 5 and 250 μmol/L. Swollen conidia, but not resting conidia increased the level of PA in A549 cells.Conclusion This improved method for determining the levels of cellular PA was high sensitive, stable and convenient for measuring indirectly the intracellular PLD activity. Our data indicated that the PLD activity in the pulmonary epithelial cells could be significantly activated by A.fumigatus swollen conidia.

Key words: phospholipase D, phosphotidic acid, detection method

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