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中华结直肠疾病电子杂志 ›› 2018, Vol. 07 ›› Issue (06) : 523 -530. doi: 10.3877/cma.j.issn.2095-3224.2018.06.005

所属专题: 文献

论著

SATB1在直肠癌新辅助放疗中的作用
孟文建1, 王自强1, 于永扬1,(), 孙晓峰1, 周总光1   
  1. 1. 610041 成都,四川大学华西医院胃肠外科
  • 收稿日期:2017-04-27 出版日期:2018-12-25
  • 通信作者: 于永扬
  • 基金资助:
    四川省科技厅应用基础项目(No.2016JY0150)

Role of SATB1 in neoadjuvant radiotherapy of rectal cancer

Wenjian Meng1, Ziqiang Wang1, Yongyang Yu1,(), Xiaofeng Sun1, Zongguang Zhou1   

  1. 1. Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
  • Received:2017-04-27 Published:2018-12-25
  • Corresponding author: Yongyang Yu
  • About author:
    Corresponding author: Yu Yongyang, Email:
引用本文:

孟文建, 王自强, 于永扬, 孙晓峰, 周总光. SATB1在直肠癌新辅助放疗中的作用[J/OL]. 中华结直肠疾病电子杂志, 2018, 07(06): 523-530.

Wenjian Meng, Ziqiang Wang, Yongyang Yu, Xiaofeng Sun, Zongguang Zhou. Role of SATB1 in neoadjuvant radiotherapy of rectal cancer[J/OL]. Chinese Journal of Colorectal Diseases(Electronic Edition), 2018, 07(06): 523-530.

目的

探讨SATB1在直肠癌新辅助放疗中的作用。

方法

选取142例直肠癌患者作为研究对象,其中68例接受术前短程放疗,74例未接受术前放疗。采用组织芯片方法检测直肠癌组织(n=142)和正常黏膜组织(n=107)、术前活检癌组织(n=84)以及转移淋巴结(n=43)中SATB1表达情况,探讨SATB1表达对直肠癌患者预后的影响,并通过生物信息学方法分析SATB1表达与多个放疗相关因子的关系。

结果

在未接受术前放疗的患者中,SATB1在正需组织中的表达低于肿瘤组织(χ2=5.396,P=0.032)而肿瘤组织中的表达高于淋巴结转移组织(χ2=6.405,P=0.002)。在接受术前放疗的患者中,SATB1表达与不良的OS(HR,0.516;P=0.039;95% CI:0.274~0.969)和DFS(HR,0.558;P=0.025;95% CI:0.335~0.930)相关。放疗可以降低直肠癌组织中SATB1的表达。在放疗的直肠癌肿瘤组织中SATB1表达与ATM和pRb2/p130表达负相关(χ2=5.427,P=0.032;χ2=4.610, P=0.047),而与Ki-67和TEM1表达正相关(χ2=4.339,P=0.037;χ2=7.376,P=0.014)。网络和蛋白-蛋白相互作用分析证实了SATB1与这些蛋白的相互联系。

结论

放疗能降低SATB1表达,后者可通过参与一些放疗反应相关的信号通路,赋予接受术前放疗的直肠癌患者生存获益。

Objective

To investigate the role of special AT-rich sequence binding protein 1 (SATB1) in neoadjuvant radiotherapy of rectal cancer.

Methods

SATB1 expression was immunohistochemically determined in primary cancer, normal mucosa, biopsy and lymph node metastasis from 142 rectal cancer patients who underwent preoperative radiotherapy (RT), 68 with and 74 without RT before surgery. The expression of SATB1 in rectal cancer tissues (n=142) and normal mucosa tissues (n=107), preoperative biopsy cancer tissues (n=84), and metastatic lymph nodes (n=43) were detected by tissue microarray. To investigate the effect of SATB1 expression on the prognosis of patients with rectal cancer. The relationship between SATB1 expression and multiple radiotherapy-related factors was analyzed by bioinformatics methods.

Results

SATB1 increased from normal mucosa to primary cancer (χ2=5.396, P=0.032), whereas it decreased from primary cancer to lymph node metastasis (χ2=6.405, P=0.022) in non-RT patients. Strong SATB1 was independently related to worse overall survival (HR, 0.516; P=0.039; 95% CI: 0.274~0.969) and disease-free survival (HR, 0.558; P=0.025; 95% CI: 0.335~0.930) in RT but not non-RT patients. Radiation can decrease SATB1 expression of rectal cancer tissues. SATB1 was negatively related to ataxia-telangiectasia mutated (ATM) and pRb2/p130 (χ2=5.427, P=0.032 and χ2=4.610, P=0.047), and positively to Ki-67 and TEM1 expression (χ2=4.339, P=0.037 and χ2=7.376, P=0.014) in patients underwent surgery after preoperative RT, which were verified in bioinformatics analysis.

Conclusions

Radiation can decrease SATB1 expression, and SATB1 may confer survival benefit for rectal cancer patients with preoperative RT by involving in radiation-responsive signaling pathways.

表1 患者及肿瘤的临床病理特征
图1 SATB1在直肠癌患者中的表达情况。1A:在未接受术前放疗的患者中,SATB1从正常组织到肿瘤表达升高,而从肿瘤到淋巴结转移表达降低(*P<0.05);1B:在接受术前放疗的患者中,SATB1从正常组织、肿瘤到淋巴结转移的表达无明显变化
图2 接受术前放疗直肠癌患者中SATB1表达与生存和复发的关系。2A:OS;2B:DFS;2C:局部复发;2D:远处转移
表2 接受术前放疗直肠癌患者OS和DFS的多因素分析
图5 蛋白-蛋白相互作用分析。5A:SATB1(浅绿色)与TEM1(青色)复合物的可能构象;5B:SATB1(浅绿色)与pRb2/p130(青色)复合物的可能构象;彩球代表氢键
表3 接受术前放疗的直肠癌患者SATB1表达与生物学因子的关系(例,%)
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