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RAGE Deficiency Impairs Bacterial Clearance in Murine Staphylococcal Sepsis, but Has No Significant Impact on Staphylococcal Septic Arthritis.

Artikel i vetenskaplig tidskrift
Författare Majd Mohammad
Manli Na
Amanda Welin
Mattias N D Svensson
Abukar Ali
Tao Jin
Rille Pullerits
Publicerad i PloS one
Volym 11
Nummer/häfte 12
Sidor e0167287
ISSN 1932-6203
Publiceringsår 2016
Publicerad vid Institutionen för medicin, avdelningen för reumatologi och inflammationsforskning
Sidor e0167287
Språk en
Länkar dx.doi.org/10.1371/journal.pone.016...
www.ncbi.nlm.nih.gov/entrez/query.f...
Ämneskategorier Infektionsmedicin, Reumatologi och inflammation

Sammanfattning

Septic arthritis is a serious joint disease often caused by Staphylococcus aureus (S. aureus). Receptor for Advanced Glycation End products (RAGE) has an important role in several infections. We sought to investigate the role of RAGE in staphylococcal septic arthritis and sepsis in mice.Wild-type (WT) and RAGE deficient (RAGE-/-) mice were intra-articularly or intravenously inoculated with an arthritic or septic dose of S. aureus LS-1 strain. Clinical arthritis, weight development and mortality were monitored for 14 days. Serum levels of cytokines, kidney bacterial loads as well as micro-CT and histopathology of the joints were assessed.RAGE-/- mice with septic arthritis had significantly lower IL-17A and higher bone mineral density (BMD) compared to the control group. However, no significant differences between the groups were observed regarding the weight loss, the severity and frequency of arthritis, and bacterial loads in the kidneys. In mice with sepsis, the overall mortality rate was similar in RAGE-/- (39%) and in WT mice (45%). However, RAGE-/- mice with sepsis had significantly higher bacterial load in their kidneys compared to the WT controls. In line with data from hematogenous S. aureus arthritis, RAGE deficiency had no impact on arthritis severity in local joint infection.Our results indicate that lack of RAGE has no significant impact on septic arthritis. However, RAGE-/- mice had significantly higher BMD compared to WT mice, which coincided with lower IL-17A in RAGE-/- mice. In sepsis, RAGE deficiency impairs bacterial kidney clearance.

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