中国癌症杂志 ›› 2015, Vol. 25 ›› Issue (10): 768-773.doi: 10.3969/j.issn.1007-3969.2015.10.002

• 论著 • 上一篇    下一篇

共刺激分子B7-H3在骨肉瘤组织中的表达及临床意义

王 玲1,2,刘 磊1,陈 伟1,张英泽1   

  1. 1. 河北医科大学第三医院骨科研究所,河北 石家庄 050011 ;
    2. 河北医科大学第四医院肿瘤研究所,河北 石家庄 050011
  • 出版日期:2015-10-30 发布日期:2015-12-17
  • 通信作者: 张英泽 E-mail:dryzzhang@126.com
  • 基金资助:
    国家自然科学基金青年基金项目(81402228);河北省自然基金青年项目(H2015206216);河北省高等人才帮扶计划;河北省博士后重点资助项目(B2013005004)。

Expression of costimulatory molecule B7-H3 in human osteosarcoma and its clinical significance

WANG Ling1,2, LIU Lei1, CHEN Wei1, ZHANG Yingze1   

  1. 1. Hebei Orthopaedic Research Institute, Third Hospital of Hebei Medical University, Shijiazhuang 050011, Hebei, China; 2. Hebei Cancer Research Institute, Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, Hebei, China
  • Published:2015-10-30 Online:2015-12-17
  • Contact: ZHANG Yingze E-mail: dryzzhang@126.com

摘要: 背景与目的:B7-H3是近年来新发现的协同刺激分子B7家族成员,但目前其在骨肿瘤中的表达及作用机制尚不明确。该研究旨在通过检测人骨肉瘤中B7-H3分子的表达,分析其与患者临床病理因素以及术后生存时间之间的关系。方法:采用免疫组织化学法检测61例人骨肉瘤组织、对应癌旁组织及良性骨肿瘤组织中B7-H3分子的表达以及肿瘤浸润T淋巴细胞的浸润程度。结果:骨肉瘤组织中B7-H3分子表达的阳性率为91.8(56/61),而B7-H3在癌旁及骨纤维结构发育不良组织中几乎不表达。B7-H3分子在骨软骨瘤中表达率为56.8%,但染色强度明显弱于骨肉瘤组织。B7-H3的表达与患者的Ennecking分期、是否发生肺转移之间的差异有统计学意义(P<0.05),与肿瘤组织中CD8+T淋巴细胞浸润程度呈负相关(P<0.05),与患者预后呈负相关(P<0.05)。结论:B7-H3在人骨肉瘤中组织异常高表达,并与肿瘤的进展、患者的预后密切相关;B7-H3可能参与了骨肉瘤微环境中的CD8+T细胞功能的调节,促使肿瘤细胞逃避免疫监视。

关键词: B7-H3, 骨肉瘤, 免疫组织化学

Abstract: Background and purpose: B7-H3 is a newly identified member of the B7-family of co-stimulatory molecule, and however, its exact role in human osteosarcoma is still unclear. The purpose of this study was to examine the expression of B7-H3 in osteosarcoma tissues and to investigate its correlations with clinicopathological factors and overall survival in patients with osteosarcoma. Methods: The expression of B7-H3 and the intensity of tumorinfiltrating T lymphocytes (TILs) in pathologic specimens of osteosarcoma, osteochondroma and bone fibrous dysplasia tissues were evaluated by immunohistochemical assay. Results: The expression rate of B7-H3 was 91.8% (56/61) in osteosarcoma lesions, while B7-H3 was barely expressed in adjacent normal tissues and bone fibrous dysplasia tissues. The intensity of B7-H3 expression in osteochondroma was 56.8%, which was significantly decreased compared with osteosarcoma tissues. Tumor B7-H3 expression was associated with Ennecking stage and pulmonary metastasis, while inversely correlated with the number of tumor-infiltrating CD8+ T cells (P<0.05). Moreover, patients with high tumor B7-H3 levels had a significantly shorter survival time and recurrence time than patients with low tumor B7-H3 levels (P<0.05). Conclusion: B7-H3 is overexpressed in human osteosarcoma tissues, and B7-H3 expression is highly correlated with tumor development and overall patients’ prognosis. Moreover, overexpression of B7-H3 in tissues can reflect CD8+ T cell infiltration and may help tumor cells avoid immune surveillance.

Key words: B7-H3, Osteosarcoma, Immunohistochemistry