Title : Paraoxonase 2 is down-regulated by the Pseudomonas aeruginosa quorumsensing signal N-(3-oxododecanoyl)-L-homoserine lactone and attenuates oxidative stress induced by pyocyanin.

Pub. Date : 2010 Jan 27

PMID : 19925453






9 Functional Relationships(s)
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1 3OC12 and the Ca2+ ionophore A23187 caused a rapid cytosolic Ca2+ influx and down-regulated PON2 mRNA, protein and hydrolytic activity in A549 and EA.hy 926 cells. Calcimycin paraoxonase 2 Homo sapiens
2 The Ca2+ chelator BAPTA/AM [1,2-bis-(o-aminophenoxy)ethane-N,N,N",N"-tetra-acetic acid tetrakis(acetoxymethyl ester)] diminished the ability of 3OC12 to decrease PON2, demonstrating that the effects are mediated by Ca2+. 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid paraoxonase 2 Homo sapiens
3 PON2 also has antioxidative properties and we show that it protects cells from pyocyanin-induced oxidative stress. Pyocyanine paraoxonase 2 Homo sapiens
4 Knockdown of PON2 by transfecting cells with siRNA (small interfering RNA) rendered them more sensitive to, whereas overexpression of PON2 protected cells from, pyocyanin-induced ROS formation. Pyocyanine paraoxonase 2 Homo sapiens
5 Knockdown of PON2 by transfecting cells with siRNA (small interfering RNA) rendered them more sensitive to, whereas overexpression of PON2 protected cells from, pyocyanin-induced ROS formation. Pyocyanine paraoxonase 2 Homo sapiens
6 Knockdown of PON2 by transfecting cells with siRNA (small interfering RNA) rendered them more sensitive to, whereas overexpression of PON2 protected cells from, pyocyanin-induced ROS formation. Reactive Oxygen Species paraoxonase 2 Homo sapiens
7 Knockdown of PON2 by transfecting cells with siRNA (small interfering RNA) rendered them more sensitive to, whereas overexpression of PON2 protected cells from, pyocyanin-induced ROS formation. Reactive Oxygen Species paraoxonase 2 Homo sapiens
8 Additionally, 3OC12 potentiated pyocyanin-induced ROS formation, presumably by inactivating PON2. Pyocyanine paraoxonase 2 Homo sapiens
9 Additionally, 3OC12 potentiated pyocyanin-induced ROS formation, presumably by inactivating PON2. Reactive Oxygen Species paraoxonase 2 Homo sapiens