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山东大学学报(医学版) ›› 2009, Vol. 47 ›› Issue (8): 85-88.

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干细胞标记物LGR5在结直肠癌发生发展中的表达及意义

郝艳萍1,胡顺明1,张世栋1,于成功1,郑金榆2,黄勤2   

  1. 南京大学医学院附属鼓楼医院 1.消化科;2.病理科,南京 210008
  • 收稿日期:2009-03-09 发布日期:2009-08-16
  • 通讯作者: 于成功(1965- ),男,博士,教授,主要从事结直肠癌和炎症性肠病研究。 Email: chenggong.yu@gmail.com
  • 作者简介:郝艳萍(1983- ),女,硕士研究生,主要从事结直肠癌的早期诊断研究。 Email: haoyanping1983@ 163.com

Expression and significance of stem cell marker LGR5 proteins in the  development  and progression of human colorectal carcinoma

HAO Yanping 1, HU Shunming 1, ZHANG Shidong 1, YU Chenggong 1, ZHENG Jinyu 2, HUANG Qin 2   

  1. 1. Departments of Gastroenterology; 2. Departments of Pathology, The Affiliated Drum Tower Hospital of
    Medical School of Nanjing University, Nanjing 210008, China
  • Received:2009-03-09 Published:2009-08-16

摘要:

目的探讨干细胞标记物LGR5(富含亮氨酸重复单位的G蛋白偶联受体5)蛋白在人结直肠癌组织中的表达水平及其与临床病理特征、结直肠癌演进过程的关系和意义。方法采用免疫组化法分别检测10例结直肠正常组织、59例腺瘤组织、70例结直肠癌标本中LGR5的表达,并分析其与临床病理指标的关系。结果①LGR5在结直肠肿瘤中表达水平明显高于结直肠正常组织,亦明显高于结直肠腺瘤(P<0.05);②结直肠癌组织中LGR5的表达水平与Dukes分期、淋巴结转移呈正相关,与组织分型、分化程度、临床特征无相关性;③结直肠腺瘤中LGR5的表达水平与临床病理参数均无相关性。结论LGR5的表达说明结直肠癌的形成与干细胞相关,LGR5在肿瘤发生过程中可能起一定作用,且与肿瘤的进展相关,可以作为早期诊断的分子标记物。

关键词: 结直肠肿瘤;腺瘤;干细胞;富含亮氨酸重复单位的G蛋白偶联受体5

Abstract:

To investigate expression of stem cell marker LGR5 protein in colorectal cancer (CRC) and to evaluate the relationship between LGR5 and clinicopathological characteristics of CRC.MethodsLGR5 expression was immunohistochemically determined on paraffinembedded, formalinfixed biopsy tissues in a total of 139 cases (10 normal colorectal mucosa (NCM), 59 colorectal adenoma (CRA) and 70 CRC). Immunoreactivity of CRA and CRC to the molecule was semiquantified by two pathologists in a doubleblinded fashion. Results1. LGR5 immunoreactivity was detected in NCM, CRA, and CRC with a significant higher expression in CRC than in the other two groups (P<0.05). 2. LGR5 expression was significantly correlated with Dukes stage and lymph node metastasis. There was no correlation between expression of LGR5 and histological type, as well as differentiation and clinical characteristics in CRC.3.There was no correlation between expression of LGR5 and clinical pathological characteristics in colorectal adenoma.ConclusionExpression of LGR5 in CRC indicated that stem cells may be involved in the pathogenesis of CRC and LGR5 may play an important role in the development and progression of colorectal cancer.

Key words: Colorectal neoplasms; Adenoma; Stem cell; LGR5

中图分类号: 

  • R735.3+5
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