Effects of antiresorptive agents on osteomyelitis: novel insights into the pathogenesis of osteonecrosis of the jaw.
The effects of antiresorptive agents (e.g., alendronate [Aln], osteoprotegerin [OPG]) on bone infection are unknown. Thus, their effects on implant-associated osteomyelitis (OM) were investigated in mice using PBS (placebo), gentamycin, and etanercept (TNFR:Fc) controls. None of the drugs affected humoral immunity, angiogenesis, or chronic infection. However, the significant (P < 0.05 vs. PBS) inhibition of cortical osteolysis and decreased draining lymph node size in Aln- and OPG-treated mice was associated with a significant (P < 0.05) increase in the incidence of high-grade infections during the establishment of OM. In contrast, the high-grade infections in TNFR:Fc-treated mice were associated with immunosuppression, as evidenced by the absence of granulomas and presence of Gram(+) biofilm in the bone marrow. Collectively, these findings indicate that although antiresorptive agents do not exacerbate chronic OM, they can increase the bacterial load during early infection by decreasing lymphatic drainage and preventing the removal of necrotic bone that harbors the bacteria.
Li
Dan
D
The Center for Musculoskeletal Research, University of Rochester, Rochester, New York, USA.
Gromov
Kirill
K
Proulx
Steven T
ST
Xie
Chao
C
Li
Jie
J
Crane
Daniel P
DP
Søballe
Kjeld
K
O'Keefe
Regis J
RJ
Awad
Hani A
HA
Xing
Lianping
L
Schwarz
Edward M
EM
D000818:Animals; D018441:Biofilms / Q000187:drug effects; D050071:Bone Density Conservation Agents / Q000494:pharmacology*; D002908:Chronic Disease; D016207:Cytokines / Q000187:drug effects; D004353:Drug Evaluation, Preclinical; D006801:Humans; D007109:Immunity / Q000187:drug effects; D015994:Incidence; D007571:Jaw Diseases / Q000139:chemically induced* / Q000453:epidemiology / Q000276:immunology; D051379:Mice; D018919:Neovascularization, Physiologic / Q000187:drug effects; D010010:Osteoclasts / Q000187:drug effects / Q000502:physiology; D010019:Osteomyelitis / Q000139:chemically induced* / Q000150:complications / Q000453:epidemiology / Q000276:immunology; D010020:Osteonecrosis / Q000139:chemically induced* / Q000453:epidemiology / Q000276:immunology; D013203:Staphylococcal Infections / Q000139:chemically induced / Q000150:complications / Q000453:epidemiology
D050071:Bone Density Conservation Agents; D016207:Cytokines; C025940:bone resorption factor
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