Dentoalveolar bacterial infections cause localized tissue and bone destruction, but usually remain well-localized within teeth in immunocompetent hosts. However, in certain cases these infections may invade head and n...Dentoalveolar bacterial infections cause localized tissue and bone destruction, but usually remain well-localized within teeth in immunocompetent hosts. However, in certain cases these infections may invade head and neck tissues, resulting in orofacial abscesses, cellulitis and sepsis, with resultant high morbidity and even mortality. In the present studies, we developed a novel model of spreading dentoalveolar infections in mice by treatment with neutralizing antibodies against both interleukin-la （IL-1a） and IL-1β. Surprisingly male but not female mice given anti-lL-1 antibodies developed orofacial abscesses, weight loss, splenomegaly and sepsis. Female mice developed abscesses and sepsis comparable to males following ovariectomy （OVX）, which was reversed by estrogen supplementation. Anti-lL-1 blockade inhibited IL-12, interferon y （IFNy） and IL-6 but not IL-IO expression in infrabony lesions, suggestive of a local anti-inflammatory response. There was greater infiltration of neutrophils and other inflammatory ceils into lesions in anti-lL-l-treated animals; however, blood leukocytes had reduced bacterial phagocytic and killing activity ex vivo. Estrogen directly stimulated IL-1 production by macrophages, suggesting that the resistance of females to disseminating dentoalveolar infections may be due to their heightened pro-inflammatory responses following bacterial challenge, leading to enhanced localization of these infections.展开更多
目的研究白细胞介素12受体B1基因(IL-12RB1)突变所致孟德尔遗传易感分枝杆菌病的基因资料及临床特点,提高对该病的认识。方法检测2016-2018年中国医学科学院北京协和医院就诊的2例播散性卡介苗感染患儿基因并分析结果,同时总结患儿的临...目的研究白细胞介素12受体B1基因(IL-12RB1)突变所致孟德尔遗传易感分枝杆菌病的基因资料及临床特点,提高对该病的认识。方法检测2016-2018年中国医学科学院北京协和医院就诊的2例播散性卡介苗感染患儿基因并分析结果,同时总结患儿的临床资料。结果 2例患儿分别为11月龄和13月龄男性儿童,均于出生后接种卡介苗,接种后3个月出现同侧腋下淋巴结肿大,病原学检查提示抗酸杆菌生长。均否认结核病接触史。基因检测分析结果显示2例患儿均为IL-12RB1复合杂合基因突变,分别为c.1561C>T,p.R521X;c.632G>C,p.R211P;c.339-340 del CT,p.L113Lfs*15和c.1791+2T>G。其中c.339-340 del CT,p.L113Lfs*15未见报道,是新突变。结论对于接种卡介苗后出现感染性播散的患儿,应进行原发性免疫缺陷基因检测,相关基因突变的识别,可为早期治疗及遗传咨询提供依据。展开更多
基金supported by grant DE-11664(PS)from the National Institute of Dental and Craniofacial Research/National Institutes of Health(NIDCR/NIH)a grant from the American Association of Endodontists(HY)
文摘Dentoalveolar bacterial infections cause localized tissue and bone destruction, but usually remain well-localized within teeth in immunocompetent hosts. However, in certain cases these infections may invade head and neck tissues, resulting in orofacial abscesses, cellulitis and sepsis, with resultant high morbidity and even mortality. In the present studies, we developed a novel model of spreading dentoalveolar infections in mice by treatment with neutralizing antibodies against both interleukin-la （IL-1a） and IL-1β. Surprisingly male but not female mice given anti-lL-1 antibodies developed orofacial abscesses, weight loss, splenomegaly and sepsis. Female mice developed abscesses and sepsis comparable to males following ovariectomy （OVX）, which was reversed by estrogen supplementation. Anti-lL-1 blockade inhibited IL-12, interferon y （IFNy） and IL-6 but not IL-IO expression in infrabony lesions, suggestive of a local anti-inflammatory response. There was greater infiltration of neutrophils and other inflammatory ceils into lesions in anti-lL-l-treated animals; however, blood leukocytes had reduced bacterial phagocytic and killing activity ex vivo. Estrogen directly stimulated IL-1 production by macrophages, suggesting that the resistance of females to disseminating dentoalveolar infections may be due to their heightened pro-inflammatory responses following bacterial challenge, leading to enhanced localization of these infections.
文摘目的研究白细胞介素12受体B1基因(IL-12RB1)突变所致孟德尔遗传易感分枝杆菌病的基因资料及临床特点,提高对该病的认识。方法检测2016-2018年中国医学科学院北京协和医院就诊的2例播散性卡介苗感染患儿基因并分析结果,同时总结患儿的临床资料。结果 2例患儿分别为11月龄和13月龄男性儿童,均于出生后接种卡介苗,接种后3个月出现同侧腋下淋巴结肿大,病原学检查提示抗酸杆菌生长。均否认结核病接触史。基因检测分析结果显示2例患儿均为IL-12RB1复合杂合基因突变,分别为c.1561C>T,p.R521X;c.632G>C,p.R211P;c.339-340 del CT,p.L113Lfs*15和c.1791+2T>G。其中c.339-340 del CT,p.L113Lfs*15未见报道,是新突变。结论对于接种卡介苗后出现感染性播散的患儿,应进行原发性免疫缺陷基因检测,相关基因突变的识别,可为早期治疗及遗传咨询提供依据。
