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Indigenous microbiota protects development of medication-related osteonecrosis induced by periapical disease in mice

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International Journal of Oral Science 2022年第2期14卷 156-163页

作者： Wen Du Mengyu Yang terresa kim Sol kim Drake W.Williams Maryam Esmaeili Christine Hong Ki-Hyuk Shin Mo K.Kang No-Hee Park Reuben H.kim State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases&Department of Prosthodontics West China Hospital of StomatologySichuan UniversityChengduChina The Shapiro Family Laboratory of Viral Oncology and Aging Research Los AngelesUSA Section of Restorative Dentistry UCLA School of DentistryLos AngelesUSA Department of Orofacial Sciences UCSF School of DentistrySan FranciscoUSA UCLA Jonsson Comprehensive Cancer Center Los AngelesUSA David Geffen School of Medicine at UCLA Los AngelesUSA

Bacterial infection is a common finding in patients,who develop medication-related osteonecrosis of the jaw(MRONJ)by the longterm and/or high-dose use of anti-resorptive agents such as bisphosphonate(BPs).However,pathological role of bacteria in MRONJ development at the early stage remains ***,we demonstrated that commensal microbiota protects against MRONJ development in the pulp-exposed periapical periodontitis mouse model.C57/BL6 female mice were treated with intragastric broadspectrum antibiotics for 1 *** acid(ZOL)through intravenous injection and antibiotics in drinking water were administered for throughout the *** was exposed on the left maxillary first molar,then the mice were left for 5 weeks after which bilateral maxillary first molar was extracted and mice were left for additional 3 weeks to *** mice were harvested,and cecum,maxilla,and femurs were *** development was assessed usingμCT and histologic *** antibiotic was treated in mice,these mice had no weight changes,but developed significantly enlarged ceca compared to the control group(CTL mice).Periapical bone resorption prior to the tooth extraction was similarly prevented when treated with antibiotics,which was confirmed by decreased osteoclasts and *** treatment with pulp exposure significantly increased bone necrosis as determined by empty lacunae and necrotic bone ***,antibiotics treatment could further exacerbate bone necrosis,with increased osteoclast *** findings suggest that the commensal microbiome may play protective role,rather than pathological role,in the early stages of MRONJ development.

关键词： protective finding antibiotics

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