Distinct immunopathology in the early stages between different antiresorptives-related osteonecrosis of the jaw-like lesions in mice

• Material Type: 博士論文
• Title: Distinct immunopathology in the early stages between different antiresorptives-related osteonecrosis of the jaw-like lesions in mice
• Author/Editor: 早野, 博紀
• Author Heading: 早野, 博紀
• Publication, Distribution, etc.: Elsevier Inc.
• Publication Date: 2020-06-03
• Publication Date (W3CDTF): 2020-06-03
• Alternative Title: 異なる骨吸収抑制薬に起因する顎骨壊死様病変の早期段階における免疫病理的相違
• Periodical title: Bone
• No. or year of volume/issue: 135
• Volume: 135
• Pages: 115308-
• ISSN (Periodical Title): ISSN : 8756-3282
• Degree grantor/type: Nagasaki University (長崎大学)
• Date Granted: 2020-06-03
• Dissertation Number: 甲医歯薬第1259号
• Degree Type: 博士(歯学)
• Text Language Code: eng
• Subject Heading: Osteonecrosis of the jaw; Denosumab; Bisphosphonates; Tooth extraction; Wound healing; Macrophages
• Target Audience: 一般
• Note (General): There is limited information about denosumab-related osteonecrosis of the jaw (DRONJ), unlike bisphosphonate-related ONJ (BRONJ). The mode of action is clearly different between denosumab and bisphosphonates. DRONJ occurs mainly following tooth extraction in cancer patients treated with the combination of denosumab and other drugs including chemotherapy. However, DRONJ animal models similar to these clinical situations have not been developed. The aims of this study were to 1) create a new model of high-prevalence chemotherapy/anti-RANKL antibody-related ONJ-like lesions to mimic patients receiving a denosumab/chemotherapy combination; and 2) compare the histopathological and immunopathological findings in the early stages of BRONJ-like and anti-RANKL antibody-related ONJ-like lesions. Cyclophosphamide (CY) and anti-mouse RANKL monoclonal antibody (mAb) or zoledronate combination therapy (CY/mAb and CY/ZA, respectively) was performed to create ONJ-like lesions in female C57BL/6J mice. Both maxillary first molars were extracted at 3 weeks after drug administration. The animals were euthanized at either 2 or 4 weeks after tooth extraction. Increased necrotic bone and empty lacunae with decreased living bone and osteocyte numbers were common histopathological findings in CY/mAb- and CY/ZA-induced impaired wound healing at 4 weeks after tooth extraction, and they were diagnosed as ONJ-like lesions based on validation of BRONJ and DRONJ in humans. In areas of impaired healing at 2 weeks post-extraction, decreases in angiogenesis and F4/80+LYVE-1? macrophages were noted as common immunopathological findings, although anti-angiogenesis was worse with CY/mAb than with CY/ZA. Interestingly, CY/mAb did not reduce F4/80+LYVE-1+ cells and normal lymphangiogenesis remained, whereas CY/ZA profoundly suppressed the larger size of F4/80+LYVE-1+ cells, similar to vessels with a concomitant decrease in lymphangiogenesis. Therefore, the distribution of the larger size of F4/80+LYVE-1+ cells differed in the early stages between different antiresorptive-induced ONJ-like lesions in conjunction with lymphangiogenesis, although the histopathological findings were similar. These findings suggest that the pathogenesis of BRONJ and DRONJ may differ due to the distributions of F4/80+LYVE-1+ tube-like-structured cells.; 長崎大学学位論文 学位記番号:博(医歯薬)甲第1259号 学位授与年月日:令和2年6月3日; Author: Hiroki Hayano, Shinichiro Kuroshima, Muneteru Sasaki, Saki Tamaki, Maaya Inoue, Akira Ishisaki, Takashi Sawase; Citation: Bone, 135, 115308; 2020; identifier:Nagasaki University (長崎大学), 博士(歯学) (2020-06-03)
• Source: fulltext; https://nagasaki-u.repo.nii.ac.jp/?action=repository_action_common_download&item_id=847&item_no=1&attribute_id=70&file_no=1
• Access Restrictions: インターネット公開
• Rights (production): c 2020 Elsevier Inc. All rights reserved.
• Related Material: http://hdl.handle.net/10069/40086
• Related Material (DOI): 10.1016/j.bone.2020.115308
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 長崎大学 : 長崎大学学術研究成果リポジトリ