颌骨骨坏死
医学
巨噬细胞
双膦酸盐
川地163
牙槽
病理
渗透(HVAC)
巨噬细胞极化
双膦酸盐相关性颌骨骨坏死
全身给药
软组织
破骨细胞
骨质疏松症
内科学
牙科
化学
体内
生物
受体
体外
生物技术
物理
热力学
生物化学
作者
Ryohei Kozutsumi,Shinichiro Kuroshima,Farah A. Al‐Omari,Hiroki Hayano,Kazunori Nakajima,Hiroe Kakehashi,Takashi Sawase
出处
期刊:Bone
[Elsevier]
日期:2023-09-13
卷期号:177: 116899-116899
被引量:4
标识
DOI:10.1016/j.bone.2023.116899
摘要
Bisphosphonate-related osteonecrosis of the jaw (BRONJ) is a potentially intractable disease with no definitive pathophysiology and no treatment and prevention strategies. This study aimed to investigate whether time-selective depletion of macrophages worsens BRONJ-like lesions in mice. A murine model of high-prevalence BRONJ-like lesions in combination with zoledronate/chemotherapeutic drug administration and tooth extraction was created according to the methods of our previous studies. Daily intra-oral submucosal administration of clodronate-loaded liposomes, which temporarily depletes systemic macrophages, was performed immediately after tooth extraction. Spleens, femora, tibiae, and maxillae were dissected 2 weeks after extraction to evaluate BRONJ-like lesions and systemic conditions by micro-computed tomography analysis, histomorphometric and immunofluorescent analyses, and serum chemistry with ELISA. Depletion of macrophages significantly decreased the numbers of local and systemic macrophages and osteoclasts on the bone surface, which markedly worsened osseous healing, with increased necrotic bone and empty lacunae in the existing alveolar bone and newly formed bone in the extraction sockets, and soft tissue healing, with decreased collagen production and increased infiltration of polymorphonuclear cells. Interestingly, the depletion of macrophages significantly shifted macrophage polarization to M1 macrophages through an increase in F4/80+CD38+ M1 macrophages and a decrease in F4/80+CD163+ M2 macrophages, with decreases in the total number of F4/80+ macrophages. These data demonstrated that severe inhibition of osteoclasts in bone tissue and polarization shifting of macrophages in soft tissue are essential factors associated with BRONJ.
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