Jiménez de Bagüés Maria Pilar, Loisel-Meyer Séverine, Liautard Jean-Pierre, Jubier-Maurin Véronique
Institut National de la Santé et de la Recherche Médicale, U431, Montpellier, F-34095 France.
Infect Immun. 2007 Jan;75(1):531-5. doi: 10.1128/IAI.01185-06. Epub 2006 Nov 13.
The survival of Brucella suis mutant strains in mice demonstrated different roles of the two high-oxygen-affinity terminal oxidases. The cbb3-type cytochrome c oxidase was essential for chronic infection in oxygen-deficient organs. Lack of the cytochrome bd ubiquinol oxidase led to hypervirulence of bacteria, which could rely on nitrite accumulation inhibiting the inducible nitric oxide synthase of the host.
猪布鲁氏菌突变株在小鼠体内的存活情况表明了两种高氧亲和力末端氧化酶的不同作用。cbb3型细胞色素c氧化酶对于在缺氧器官中的慢性感染至关重要。细胞色素bd泛醇氧化酶的缺失导致细菌的毒力增强,这可能依赖于亚硝酸盐的积累来抑制宿主的诱导型一氧化氮合酶。