Oral microbiota and host innate immune response in bisphosphonate-related osteonecrosis of the jaw
Smruti Pushalkar , Xin Li , Zoya Kurago , Lalitha V Ramanathapuram , Satoko Matsumura , Kenneth E Fleisher , Robert Glickman , Wenbo Yan , Yihong Li , Deepak Saxena
International Journal of Oral Science ›› 2014, Vol. 6 ›› Issue (4) : 219 -226.
Oral microbiota and host innate immune response in bisphosphonate-related osteonecrosis of the jaw
Decreased immune response and colonization by certain bacteria may increase risk of bisphosphonate-related osteonecrosis of the jaw (BRONJ). Deepak Saxena of the New York University College of Dentistry, USA, and colleagues have shown that cancer patients who have been treated with bisphosphonates to reduce bone loss can, paradoxically, experience localized bone loss from the jaw. In a study of 30 oral surgery patients, Saxena and colleagues used a genetic approach to identify oral bacteria in BRONJ lesions and compared the immune responses of BRONJ patients and controls. BRONJ patients showed decreased immune response and more frequent colonization by opportunistic pathogens such as Parvimonas, Fusobacterium, Eubacterium besides, Streptococcus onto the BP-bound bone contributing to jaw necrosis. Some unnamed or uncultured bacteria were only found in BRONJ and bisphosphonate-treated patients. This study of the relationship between microbial colonization and immune response provides insights into the disease process in BRONJ.
bisphosphonates / denaturing gradient gel electrophoresis / host response / innate immunity / oral microbiota / osteonecrosis of the jaw
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