Hrvatska znanstvena bibliografija (CROSBI)



Pregled bibliografske jedinice broj: 239954

Časopis

Autori: Asare, Rexford; Šantić, Marina; Gobin, Ivana; Dorić, Miljenko; Suttles, Jill; Graham, E. James; Price, D. Christopher; Abu Kwaik, Yousef
Naslov: Genetic Susceptibility and Caspase Activation in Mouse and Human Macrophages Are Distinct for Legionella longbeachae and L. pneumophila
( Genetic Susceptibility and Caspase Activation in Mouse and Human Macrophages Are Distinct for Legionella longbeachae and L. pneumophila )
Izvornik: Infection and Immunity (0019-9567) 75 (2007), 4; 1933-1945
Vrsta rada: članak
Ključne riječi: caspase-3; apoptosis; Legionnaires' disease
( caspase-3; apoptosis; Legionnaires' disease )
Sažetak:
Legionella pneumophila is the predominant cause of Legionnaires' disease in the United States and Europe, while Legionella longbeachae is the common cause of the disease in Western Australia. Although clinical manifestations by both intracellular pathogens are very similar, recent studies have shown that phagosome biogeneses of both species within human macrophages are distinct. Most inbred mouse strains are resistant to infection by L. pneumophila, with the exception of the A/J mouse strain, and this genetic susceptibility is associated with polymorphism in the naip5 allele and flagellin-mediated early activation of caspase 1 and pyropoptosis in nonpermissive mouse macrophages. Here, we show that genetic susceptibility of mice to infection by L. longbeachae is independent of allelic polymorphism of naip5. L. longbeachae replicated within bone marrow derived macrophages and in the lungs of A/J, C57Bl/6 and BALB/c mice, while L. pneumophila replicated in macrophages in vitro and in the lungs of the A/J mouse strain only. Quantitative real-time PCR studies on infected A/J and C57Bl/6 mouse bone marrow-derived macrophages show that both L. longbeachae and L. pneumophila trigger similar levels of naip5 expression, but the levels are higher in infected C57Bl/6 mouse macrophages. In contrast to L. pneumophila, L. longbeachae has no detectable pore-forming activity and doses not activate caspase 1 in A/J and C57Bl/6 mouse or human macrophages, despite flagellation. Unlike L. pneumophila, L. longbeachae triggers only a modest activation of caspase 3 and low levels of apoptosis in human and murine macrophages in vitro and in the lungs of infected mice at late stages of infection. We conclule that despite flagellation, infection by L. longbeachae is independent of polymorphism in the naip5 allele and L. longbeachae does not trigger the activation of caspase 1, caspase 3, or late-stage apoptosis in mouse and human macrophages neither species triggers caspase 1 activation in human macrophages.
Projekt / tema: 062-0621273-1275, 062-0621273-0950
Izvorni jezik: eng
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
MEDLINE
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Temeljne medicinske znanosti
URL Internet adrese: http://iai.asm.org/cgi/content/short/75/4/1933
URL cjelovitog teksta:
Google Scholar: Genetic Susceptibility and Caspase Activation in Mouse and Human Macrophages Are Distinct for Legionella longbeachae and L. pneumophila