骨桥蛋白、caspase-3及突变型P53在胶质瘤中的表达研究

The study on expressions of osteopontin,caspase-3 and mt-P53 in glioma

目的研究胶质瘤中骨桥蛋白(OPN)、半胱氨酸天冬氨酸蛋白酶-3(caspase-3)和突变型P53(mt-P53)蛋白的表达意义和相关性。方法选取脑胶质瘤(胶质瘤组)患者的标本70例,非脑胶质瘤脑组织10例作为对照组。应用免疫组织化学SP法检测2组OPN、caspase-3及mt-P53蛋白的阳性表达率。蛋白免疫印迹法检测脑胶质瘤中OPN、caspase-3和mt-P53蛋白表达与脑胶质瘤级别的关系。Spearman等级相关分析OPN、caspase-3和mt-P53表达阳性的关系。结果脑胶质瘤组OPN、mt-P53阳性表达率(64.29%和60%)均高于对照组(无阳性表达),caspase-3阳性率低于对照组(47.14%vs.90%),差异有统计学意义(均P<0.05)。OPN、caspase-3和mt-P53在脑胶质瘤不同性别、年龄、肿瘤大小及肿瘤部位组间的阳性表达率差异无统计学意义(P>0.05)。胶质瘤分级越高,OPN和mt-P53的阳性表达率越高,而caspase-3的阳性表达率越低(均P<0.001)。随着脑胶质瘤级别的增加,OPN和mt-P53蛋白表达水平上调,而caspase-3的蛋白表达水平下降。OPN与caspase-3阳性表达呈负相关,与mt-P53表达呈正相关(rs分别为-0.720和0.722,P<0.05),caspase-3和mt-P53表达呈负相关(rs=-0.556,P<0.05)。结论胶质瘤分级越高,OPN和mt-P53的阳性表达率越高,而caspase-3的阳性表达率越低;三者与胶质瘤发生、发展均密切相关,联合检测有助于对胶质瘤生物学行为的判断。

Objective To study the expressions of osteopontin (OPN),caspase-3 and mt-P53 proteins, and their relationship in gliomas. Methods Seventy gliomas specimens of patients (glioma group) were selected, and 10 samples of non-glioma brain tissue were used as control group. The SP method was used to detect the positive rates of protein expressions of OPN, caspase-3 and mt-P53 between two groups. The relationship between protein expressions of OPN, caspase-3 and mt-P53 in gliomas and grade of gliomas were detected by Western blot assay. Spearman rank correlation was compared between the positive expression of OPN, caspase-3 and rate mt-P53. Results The positive expression rates of OPN and mt-P53 were significantly higher in glioma group (64.29% and 60%) than those of control group (no positive expression), but the positive expression rate of caspase-3 was significantly lower than that of control group (47.14% vs. 90%, P<0.05). There were no significant differences in OPN,caspase-3 and mt-P53 expressions between different gender, age, tumor size and tumor position (P > 0.05). The higher the WHO classification, the higher the positive expression rates of OPN and mt-P53 (P < 0.001), and the lower the positive expression rate of caspase-3 (P < 0.001). With the increased level of glioma grade, OPN and mt-P53 protein levels were increased, but caspase-3 protein expression level was decreased. There was a negatively correlation between OPN and the positive expression of caspase-3, but there was a positive correlation between OPN and the expression of mt-P53 (rs = -0.720 and 0.722, P < 0.05). There was a negative correlation between caspase-3 and mt-P53 expressions (rs = -0.556, P < 0.05). Conclusion The higher the WHO classification, the higher the positive expression rates of OPN and mt-P53, while the lower the positive expression rate of caspase-3. The study reveals that OPN, caspase-3 and mt-P53 expressions are associated with the occurrence and the progress of gliomas.The combined detection of them can contribute to the judgment of biological behavior of gliomas.