摘要目的 检测骨肉瘤患者血清中整合素α2β1的表达,探讨其与骨肉瘤生物学行为的关系及在治疗前后和肺转移时的变化.方法 应用酶联免疫吸附技术检测43例骨肉瘤患者(病例组)术前及术后、化疗前及化疗后血清整合素α2β1含量,男28例,女15例;年龄8～47岁,平均(18.42±9.10)岁;骨母细胞型24例,纤维母细胞型9例,软骨母细胞型7例,其他3例;EnnekingⅡA期13例,ⅡB期26例,Ⅲ期4例;其中22例患者接受新辅助化疗.26例志愿者为正常对照组,男16例,女10例;年龄18～32岁,平均(23.54±3.82)岁.病例组分别根据肿瘤大小、原发部位、临床分期、组织学分型以及转移情况进行分组,比较各组血清中整合素α2β1表达的差异.结果 病例组患者术前血清整合素α2β1为(2.44±0.89)μg/L,显著高于对照组(1.85±0.43)μg/L.术前表达水平与骨肉瘤Enneking临床分期、肿瘤大小和远处转移存在相关性,而与肿瘤原发部位及Dahlin组织学分型无关.骨肉瘤保肢术后患者整合素α2β1的血清浓度降低.接受新辅助化疗的患者化疗前后血清中整合素α2β1表达水平的差异具有统计学意义.结论 整合素α2β1的表达与骨肉瘤的发生、发展、转移呈正相关,可能成为一项新的诊断及评估骨肉瘤预后的生物学指标.

abstractsObjective To evaluate the expression of Integrin α2β1 in serum of osteosarcoma patients and to investigate the effect of Integrin α2β1 on metastasis of osteosarcoma. Methods Sandwich enzymelinked immunosorbent assay was applied to test Integrin α2β1 in serum of 26 healthy controls (male 16, female 10; age 18-32, average age 23.54±3.82) and 43 osteosarcoma patients (male 28, female 15;age 8-47,average age 18.42±9.10)before and after the surgery and the chemotherapy. The patients included osteoprogenitor cells type in 24 cases, fibroblast type in 9 cases, chondroblast type in 7 cases, and other types in 3cases; with Enneking stage ⅡA in 13 cases, stage ⅡB in 26 cases, stage Ⅲ in 4 cases. Among them, 22 patients receive the neo-adjuvant chemotherapy. After that, we compared the data of different groups. At the same time, in accordance with tumor size, position, clinical stage, histology grade and metastasis situation to categorize groups compared among the groups of serum Integrin α2β1 differences in order to explore its relationship with patients' prognosis and metastasis. Results The Integrin α2β1 of osteosarcoma patients in blood before the surgery was expressed highly. It was significantly higher than the control group. The expression before surgery had significant correlation with osteosarcoma Enneking clinical stages, tumor size and metastasis. And it was independent of tumor position and Dahlin histology grade. The expression of Integrin α2β1 in blood of the osteosarcoma patients after limb salvage surgery decreased significantly. And the expression of Integrin α2β1 in blood of patients receiving new adjuvant chemotherapy was significant differences before and after the chemotherapy. Conclusion The expression of Integrin α2β1 has positive correlation with the occurrence, development and metastasis of the osteosarcoma. It is probably a new biological indicator for diagnosis and estimating prognosis of osteosarcoma. Simultaneously surgery and new adjuvant chemotherapy are still effective methods to treat osteosarcoma.