背景：最新研究显示，血清和糖皮质激素调节蛋白激酶3可能与某些肿瘤的发生有着密切关系，且对白细胞介素3撤退所诱导的乳腺癌细胞凋亡具有保护作用。另据相关报道显示，血清和糖皮质激素调节蛋白激酶3可能参与调节细胞内Wnt信号通路。 目的：观察乳腺癌干细胞中血清和糖皮质激素调节蛋白激酶3及β-Catenin蛋白的表达。 方法：采用双波段流式细胞分选仪从71例人乳腺癌组织中分选乳腺癌干细胞，并进行鉴定及传代培养，以30例正常乳腺组织作为对照。应用SP免疫法检测乳腺癌干细胞和正常乳腺组织中血清和糖皮质激素调节蛋白激酶3、β-Catenin蛋白的表达。 结果与结论：乳腺癌干细胞中血清和糖皮质激素调节蛋白激酶3、β-Catenin的表达均显著高于正常乳腺组织(P<0.01)。二者在乳腺癌干细胞中的表达呈正相关(r=0.318，P<0.05)。说明血清和糖皮质激素调节蛋白激酶3可能通过调控Wnt/β-Catenin信号通路，参与乳腺癌的发生发展过程。%BACKGROUND:Serum and glucocorticoid-regulated protein kinase 3 may be related to tumor progression, and can prevent the apoptosis of breast cancer cells induced by interleukin-3 withdrawal. Serum and glucocorticoid regulated protein kinase 3 possibly participate in the regulation of intracellular Wnt signal pathway. OBJECTIVE:To investigate the expression of serum and glucocorticoid-regulated protein kinase 3 andβ-catenin protein expression in breast cancer cells. METHODS:Breast cancer stem cells were isolated, identified and subcultured from 71 breast cancer cases by dual-wave flow cytometry. The 30 normal breast tissues were used as the controls. SP immunohistochemistry analysis was used to detect the level of serum and glucocorticoid-regulated protein kinase 3 andβ-catenin protein expression in breast cancer stem cells and normal breast tissues. RESULTS AND CONCLUSION:The expression of serum and glucocorticoid-regulated protein kinase 3 andβ-catenin in breast cancer stem cells were both higher than that of normal breast tissues (P<0.01). There had a positive correlation between serum and glucocorticoid-regulated protein kinase 3 andβ-catenin expression in breast cancer stem cells (r=0.318, P<0.05). Serum and glucocorticoid-regulated protein kinase 3 may play an important role in the occurrence and development of breast cancer by regulation of Wnt/β-catenin pathway.
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