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胃癌是一种侵略能力较强的恶性肿瘤,其发病率在全球恶性肿瘤中居第4位,病死率居第2位[1]。并且我国进展期胃癌治疗效果欠佳,五年生存率较低,其原因主要与胃癌细胞的侵袭能力强和转移早的特点相关[2]。有研究已经识别出胃癌相关的特异性基因[3], 但准确检测胃癌或者预测胃癌生存率的确切生物学标志仍缺乏。Gremlin1蛋白为促血管生成因子,是骨形态发生蛋白(BMP)的拮抗剂,存在于隐窝上皮细胞中。在实体肿瘤中明确Gremlin1的表达机制可能发现治疗癌症的潜在靶点[4]。Gremlin1具有促进血管生成和肿瘤形成的独立作用[5],可能是通过作用于BMP信号通路来抑制癌细胞的增殖和侵袭,在多种肿瘤生物学过程中发挥关键作用,并且已经被证实表达于结肠分叶状腺瘤和结肠癌中[6-7]。其在结肠癌等中表达的研究已经非常成熟,但其在胃癌组织中的表达情况及结果分析在国内鲜见报道,国外相关研究亦少有。Gremlin1激活的确切机制、与肿瘤进展的关系以及其在肿瘤血管生成中的作用还需要进一步阐明。本研究分析Gremlin1在胃癌的不同临床病理学参数间的表达差异,探讨其在胃癌组织中的临床意义。现作报道。
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Gremlin1在正常组织中无表达(见图 3),在胃癌组织的细胞质中有表达(见图 4),其中阳性病例61例,阴性病例59例。不同性别、年龄、肿瘤大小、临床分期下Gremlin1表达差异无统计学意义(P>0.05),而不同淋巴结转移、肿瘤分级和组织来源的Gremlin1表达差异有统计学意义(P < 0.05)(见表 1)。
分组 阳性 阴性 χ2 P 年龄 <60岁 25 31 1.61 >0.05 >60岁 36 28 性别 男 47 37 3.71 >0.05 女 13 22 肿瘤大小 < 5 cm 38 37 0.00 >0.05 >5 cm 23 22 淋巴结浸润 阳性 30 42 6.05 <0.05 阴性 31 17 临床分期 Ⅰ/Ⅱ 33 24 2.17 >0.05 Ⅲ/Ⅳ 28 35 组织学特点 分化型 23 21 8.56 <0.01 未分化型 38 38 组织来源 肠型胃癌 1 7 — <0.05 胃型胃癌 60 52 表 1 Gremlin1与临床病理学参数的相关性(n)
Gremlin1在胃癌组织中的表达及其作用分析
Analysis of the expression level of Gremlin1 and its role in gastric cancer tissue
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摘要:
目的分析Gremlin1在胃癌的不同临床病理学参数及胃癌组织和癌旁正常组织中的表达差异,探讨其在胃癌组织中的临床意义。 方法选取胃癌根治术后的120例组织标本及其癌旁组织,采用免疫组织化学方法检测Gremlin1的表达及其分布情况,进行定性分析。 结果Gremlin1在部分正常组织中无表达,在胃癌组织的细胞质中有表达,其中阳性病例61例,阴性病例59例。不同性别、年龄、肿瘤大小、临床分期下Gremlin1表达差异无统计学意义(P>0.05),而不同淋巴结转移、肿瘤分级和组织来源的Gremlin1表达差异有统计学意义(P < 0.05~P < 0.01)。 结论Gremlin1在胃癌进展中起重要作用,提示胃癌预后不良。 Abstract:ObjectiveTo analyze the different clinicopathological parameters of Gremlin1 expression in gastric cancer and difference of Gremlin1 expression between the gastric cancer tissue and adjacent noncancerous tissue, and explore its clinical significance in gastric cancer tissue. MethodsThe expression level and distribution of Gremlin1 in 120 gastric cancer and adjacent tissue samples were detected using immunohistochemistry after radical gastrectomy for qualitative analysis. ResultsThe Gremlin1 expression in normal tissue was not found, and the expression of Gremlin1 in cytoplasm of gastric cancer tissue was identified.There were 61 positive cases and 59 negative cases.The differences of the expression levels of Gremlin1 in different gender, age, tumor size and clinical stage were not statistically significant(P>0.05), and the differences of the expression levels of Gremlin1 in different lymph node metastasis and tumor grading were statistically significant(P< 0.05 to P < 0.01). ConclusionsGremlin1 play an important role in the progression of gastric cancer, which indicates the poor prognosis of gastric cancer. -
Key words:
- gastric neoplasms /
- Gremlin1 /
- bone morphogenetic protein /
- immunohistochemistry
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表 1 Gremlin1与临床病理学参数的相关性(n)
分组 阳性 阴性 χ2 P 年龄 <60岁 25 31 1.61 >0.05 >60岁 36 28 性别 男 47 37 3.71 >0.05 女 13 22 肿瘤大小 < 5 cm 38 37 0.00 >0.05 >5 cm 23 22 淋巴结浸润 阳性 30 42 6.05 <0.05 阴性 31 17 临床分期 Ⅰ/Ⅱ 33 24 2.17 >0.05 Ⅲ/Ⅳ 28 35 组织学特点 分化型 23 21 8.56 <0.01 未分化型 38 38 组织来源 肠型胃癌 1 7 — <0.05 胃型胃癌 60 52 -
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