In vitro and in vivo characterization of a Mycobacterium tuberculosis mutant deficient in glycosyltransferase Rv1500.

In vitro and in vivo characterization of a Mycobacterium tuberculosis mutant deficient in glycosyltransferase Rv1500. Research Abstract Details 

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In vitro and in vivo characterization of a Mycobacterium tuberculosis mutant deficient in glycosyltransferase Rv1500. Abstract Text:

In Mycobacterium marinum, the homologue of Rv1500 of M. tuberculosis encodes a glycosyltransferase. Initially, it was suggested that this gene is involved in the synthesis of phosphatidylinositol mannosides (PIMs), generating Ac(2)PIM(7) from Ac(2)PIM(5). Phosphatidylinositol mannoside and its related compounds lipomannan (LM) and lipoarabinomannan (LAM) have been shown to modulate the host response to an infection with M. tuberculosis. Here, we generated a deletion mutant of Rv1500 in M. tuberculosis H37Rv, and analyzed the mutant using a biochemical approach as well as in vitro and in vivo infection models. Inactivation of Rv1500 did not lead to an altered expression pattern of PIMs in M. tuberculosis H37Rv. We found phosphatidylinositol (PI), PIM(2), AcPIM(2), Ac(2)PIM(2), and AcPIM(6) in both strains, but were unable to detect Ac(2)PIM(7) or Ac(2)PIM(5) either in the wild type or the mutant strain. Uptake and growth of H37Rv and Rv1500 mutant strains in murine bone marrow-derived macrophages was identical, and TNFalpha and IL-12p40 production in mouse macrophages and dendritic cells was induced to similar levels following infection with either strain. Aerosol challenge of mice showed that wild type and Rv1500 mutant strains had identical growth rates in infected organs over time. We verified mRNA expression of Rv1500 in H37Rv and conclude that Rv1500 must serve a redundant role in viability and virulence of M. tuberculosis.

In vitro and in vivo characterization of a Mycobacterium tuberculosis mutant deficient in glycosyltransferase Rv1500. Publishing Authors By Initials

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In vitro and in vivo characterization of a Mycobacterium tuberculosis mutant deficient in glycosyltransferase Rv1500. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: International journal of medical microbiology : IJ

VOLUME: 298

Page Numbers: 645-55

Journal Abbreviation: Int. J. Med. Microbiol.

ISSN: 1618-0607

DAY: 26

MONTH: 06

YEAR: 2008

In vitro and in vivo characterization of a Mycobacterium tuberculosis mutant deficient in glycosyltransferase Rv1500. Information

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LANGUAGE: eng

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Grant and Affiliation Information for In vitro and in vivo characterization of a Mycobacterium tuberculosis mutant deficient in glycosyltransferase Rv1500.

AFFILIATION: Department of Medical Microbiology and Hospital Epidemiology, Medical School Hannover, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany.

Country: Germany

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MEDLINETA: Int J Med Microbiol

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