<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alonso-Hearn, Marta</style></author><author><style face="normal" font="default" size="100%">Eckstein, Torsten M</style></author><author><style face="normal" font="default" size="100%">Sommer, Sandra</style></author><author><style face="normal" font="default" size="100%">Bermudez, Luiz E</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A Mycobacterium avium subsp. paratuberculosis LuxR regulates cell envelope and virulence.</style></title><secondary-title><style face="normal" font="default" size="100%">Innate immunity</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Innate Immun</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Animals</style></keyword><keyword><style  face="normal" font="default" size="100%">Anti-Bacterial Agents</style></keyword><keyword><style  face="normal" font="default" size="100%">Cattle</style></keyword><keyword><style  face="normal" font="default" size="100%">Cell Line</style></keyword><keyword><style  face="normal" font="default" size="100%">Cell Wall</style></keyword><keyword><style  face="normal" font="default" size="100%">Culture Media</style></keyword><keyword><style  face="normal" font="default" size="100%">DNA, Bacterial</style></keyword><keyword><style  face="normal" font="default" size="100%">Gene Expression Regulation, Bacterial</style></keyword><keyword><style  face="normal" font="default" size="100%">Lipids</style></keyword><keyword><style  face="normal" font="default" size="100%">Microarray Analysis</style></keyword><keyword><style  face="normal" font="default" size="100%">Milk</style></keyword><keyword><style  face="normal" font="default" size="100%">Mycobacterium avium subsp. paratuberculosis</style></keyword><keyword><style  face="normal" font="default" size="100%">Peptides</style></keyword><keyword><style  face="normal" font="default" size="100%">Repressor Proteins</style></keyword><keyword><style  face="normal" font="default" size="100%">Reverse Transcriptase Polymerase Chain Reaction</style></keyword><keyword><style  face="normal" font="default" size="100%">RNA, Bacterial</style></keyword><keyword><style  face="normal" font="default" size="100%">Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization</style></keyword><keyword><style  face="normal" font="default" size="100%">Trans-Activators</style></keyword><keyword><style  face="normal" font="default" size="100%">Transcription, Genetic</style></keyword><keyword><style  face="normal" font="default" size="100%">Virulence</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010 Aug</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">16</style></volume><pages><style face="normal" font="default" size="100%">235-47</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Mycobacterium avium subsp. paratuberculosis adapts to the environment via the regulation of genes affecting its envelope's composition. Bacteria grown in milk (in vivo conditions) presented differences in the cell wall-associated lipids and in the expression of genes involved in lipid metabolism (FadE8, FadE6 and MAP1420) and host cell invasion (MAP1203, LprL). A different lipid profile was also observed in the envelope of intracellular bacteria after 1 h of infection. Intracellular bacteria showed up-regulation of a LuxR regulator which controls the envelope's composition by up-regulation of FadE8, MAP1420, MAP1203 and LprL and by down-regulation of pks12, mmpL2 and MAP2594. A LuxR-overexpressing strain with a lipid-deficient envelope phenotype, infected epithelial cells more efficiently than the wild-type bacteria; however, it was not more resistant than the wild-type strain to the action of bactericidal proteins. Here we show that LuxR regulates virulence determinants and is involved in mycobacteria adaptation to the host.</style></abstract><issue><style face="normal" font="default" size="100%">4</style></issue><custom1><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/19710090?dopt=Abstract</style></custom1></record></records></xml>