Abstract：
:Upon oxygen shift-down, Mycobacterium tuberculosis complex bacteria can induce a genetic program characterized by halted duplication, which is called Non-replicating persistence (NRP). During this phase, at least 48 genes, collectively named Dormancy survival regulator (DosR) regulon, are important for the long-term survival of bacilli under a non-respiring state, a condition that bacilli encounter inside granulomatous lesions. It remains unclear whether expression of NRP genes occurs within the tissue of Mycobacterium bovis naturally infected cattle. In order to start dissecting this question, total RNA from bovine lymph node tissues of sacrificed tuberculin reacting animals was isolated and transcription of genes required for in vivo duplication (esxB and fbpB) and in vitro NRP (hspX, pfkB, and mb2660c) were analyzed by RT-PCR approaches. Detection of transcripts was positive in bovine tissue samples for genes hspX, pfkB, and mb2660c in 84, 32, and 21%, respectively. NRP genes were upregulated even in animals with a negative IFN-γ in vitro test, and the expression of NRP genes occurred more often than expression of the esxB gene.
journal_name
Microb Pathogjournal_title
Microbial pathogenesisauthors
Jiménez BA,Hinojoza-Loza E,Flores-Valdez MA,Prado-Montes de Oca E,Allen K,Estrada-Chávez C,Herrera-Rodríguez S,Flores-Fernández JM,Martínez-Velázquez M,Hernández-Gutiérrez R,Alvarez AHdoi
10.1016/j.micpath.2013.04.012subject
Has Abstractpub_date
2013-08-01 00:00:00pages
23-8eissn
0882-4010issn
1096-1208pii
S0882-4010(13)00058-2journal_volume
61-62pub_type
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