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1.
在组织切片上进行原位RT-PCR扩增(in situ RT-PCR),并在扩增过程中掺入地高辛标记的尿嘧啶核苷酸(Dig-UTP),观察新基因SNC 66在胃癌组织与正常胃粘膜中的表达差异,以分析SNC 66与胃癌发生的相关性。结果发现,25个循环时,20例胃癌标本中有4例阴性不表达,16例呈强阳性表达;当循环数降至10时,则6例呈阴性,9例呈弱阳性表达,另有5例呈强阳性表达。表明SNC 66基因在胃癌组织中存在明显的表达降低或表达缺陷,SNC 66可能是一个消化道肿瘤的负相关基因。  相似文献   

2.
应用非同位素标记的原位杂交技术,配对检测了SNC 6基因在37例大肠癌病人的正常粘膜、癌旁粘膜和癌组织中的表达情况,并结合临床病理资料,探讨SNC 6表达与大肠癌发生、发展的相关性。结果表明,SNC 6基因只表达在大肠粘膜的上皮结构中,在大肠癌中发生了明显的表达降低或表达缺乏。该基因的表达与癌症病人的性别、年龄、Dukes分期、分化程度及浸润深度无关,但与有无淋巴结转移有关。提示SNC 6可能参与大肠癌发生发展后期的次级分子事件。  相似文献   

3.
目的:探讨不同胃粘膜病变组织中bax基因蛋白、诱导型NO合酶(iNOS)的表达及其与幽门螺杆菌(HP)感染相关性。方法:选取我院2002~2004年102例胃粘膜组织标本及患者血清。其中慢性胃炎15例,异型增生22例,胃癌65例。应用免疫组化检测上述组织的bax、iNOS表达,应用组织切片革兰染色和酶联免疫法分别检测组织中的HP及血清HP抗体。结果:在慢性胃炎、异型增生、胃癌组织中HP的检出率分别为:7/15(46.7%)、15/22(68.2%)34/65(52.3%)。且上述各组中bax、iNOS的表达与HP感染存在正相关性。不同胃粘膜病变组织中,HP阳性组bax、iNOS阳性表达率显著高于HP阴性组。结论:bax、iNOS的表达与HP感染密切相关,HP可能通过NO的诱导及bax调控使细胞增值加速和凋亡异常而参与胃癌的发生、发展过程。  相似文献   

4.
应用免疫组织化学SP法检测胃癌组织及同一患者相应正常胃粘膜组织中CA15-3的表达情况。结果显示:20例胃癌组织中阳性表达者15例,而正常胃粘膜均为阴性。这表明CA15-3的表达与胃癌之间存在明显的相关性,CA15-3阳性表达可能是胃癌变细胞的标志之一。CA15-3阳性表达及胞浆阳性定位与与胃癌进展,浸润深度,淋巴结转移无关,但与胃癌分化程度呈负相关。  相似文献   

5.
目的:探讨HSP_(27)在消化道癌中的表达状况和意义。方法:收集食道癌、胃癌和大肠癌标本168例,用SP免疫组织化学方法染色。结果:HSP在食道癌、胃癌和大肠癌中的表达率分别为66.04%、37.04%和34.43%;在食道癌中高分化组阳性率(75%)明显高于低分化组(38.46%)。HSP表达与性别、年龄、癌侵润深度、淋巴有无转移的相关性不显著。结论:HSP在食道、胃、大肠癌中表达率依次下降,HSP表达率与癌分化程度有一定相关性。  相似文献   

6.
目的:评估MACC1基因在胃癌发生发展中的作用。创新点:首次发现胃癌中MACC1基因高表达,并且在患者标本中发现高表达MACC1和胃癌的远处转移和预后有显著相关性。方法:使用免疫组化的方法对105例胃癌患者进行分析,并且将MACC1和其临床特点包括年龄、肿瘤大小、肿瘤分化以及远处转移状况进行归纳和显著性检验,进一步将患者分为MACC1高表达和低表达组。通过定期的随访,绘制患者生存曲线。结论:本实验中发现了在胃癌远处转移灶组织中MACC1表达显著升高。然而MACC1的高表达和胃癌的肿瘤大小、肿瘤分化等特性未见明显相关性。同时胃癌患者的5年生存率和MACC1的高表达有显著性关联。  相似文献   

7.
采用S-P免疫组织化学的方法,配对检测了37例大肠癌组织及同一病人的正常粘膜上皮中p53蛋白的表达情况。结果表明,p53蛋白表达阳性19例,阴性18例,阳性率为51.4%,而配对的大肠正常粘膜检测结果均呈p53阴性;p53蛋白表达与病人性别、年龄、Dukes分期等因素无明显相关性,而与淋巴结转移、浸润深度和不同分化程度等存在明显相关性。提示p53蛋白的检测可以作为大肠癌病人病情诊断和预后分析的辅助手段。  相似文献   

8.
目的:探讨Smad4基因在大肠癌中的表达及其与肿瘤分化程度或远处转移的关系。方法:利用免疫组织化学S~P法检测52例大肠癌组织、19例相应的癌旁正常组织中Smad4的表达。结果:Smad4在大肠癌原发灶中的阳性表达率为63.5%(33/52),与癌旁正常组织中的阳性表达率89.5%(17/19)相比,Smad4阳性表达水平显著降低,差别有显著性(P〈0.05);Smad4与肿瘤细胞分化程度无关(P〉0.05),但与淋巴结转移显著相关(P〈0.05)。结论:Smad4的低表达可能是大肠癌发生过程的晚期事件,并可能通过直接或间接的作用促进大肠癌的淋巴结转移。  相似文献   

9.
目的:观察金属硫蛋白(metallothionein,MT)在胃癌中的表达状况.方法:对66例病人的癌组织标本采用SP免疫组织化学方法染色,观察MT的表达状况.结果:MT在胃癌中的表达总阳性率为54.5%(36/66),MT在胃癌中表达与癌组织分化程度相关性不明显;与侵犯深度呈正相关.结论:MT在胃癌中有较高表达,检测MT对制定化疗方案中有指导意义.  相似文献   

10.
目的:研究胃腺癌原癌基因Cerb B-2在肿瘤发生、发展过程中的作用并探讨其临床相关性。方法:应用免疫组织化学法(IHC)对435例胃腺癌组织标本、95例正常切缘粘膜组织标本中Cerb B-2基因的表达情况进行检测。结果:Cerb B-2基因在胃腺癌组织、正常切缘组织中的表达阳性率分别为30.8%、16.8%,差异有统计学意义(P〈0.01);在胃腺癌组织中,Cerb B-2基因的表达与患者的年龄、性别、肿瘤大小、分化程度均无相关性(P〉0.05),而与肿瘤的临床分期(TNM分期)相关,差异有统计学意义(P〈0.01)。结论:Cerb B-2基因与胃腺癌有明显的关联,可作为判定胃癌中最多见的胃腺癌的生物学行为的重要参考指标,对临床治疗及预后判定都能起到一定作用。  相似文献   

11.
用体外转录的方法制备得地高辛标记的cRNA探针,并以此对大肠癌组织及同一病人的正常粘膜进行SNC66基因表达的cRNA/mRNA原位杂交配对研究。结果表明,SNC66基因的表达细胞主要是上皮细胞和淋巴细胞;其在大肠癌中存在明显的表达缺陷。SNC66基因可作为候选抑癌基因加以研究、利用。  相似文献   

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14.
Objective: To investigate the distribution of H. pylori antigens in the gastric mucosa in patients with H. pylori infection, and the relationship between the distribution and gastric cancer. Methods: Of 112 patients confirmed by pathological study to have chronic superficial gastritis, precancerous changes (chronic atrophic gastritis, intestinal metaplasia or atypical hyperplasia) and gastric cancer, 28 were H. pylori negative and 84 were H. pylori positive. H. pylori antigens in the gastric mucosa were detected by immunohistochemistry. Results: The H. pylori positive group, comprised 12 of 22 (50.0%) in the chronic superficial gastritis group, 22 of 25 (88.0%) in the precancerous changes group and 13 of 35 (37.1%) in the gastric cancer group. The positive rates of H. pylori antigens in the cytoplasm progressively increased, respectively at 0.0% (0/12),63.6% (14/22) and 84.6% (11/13) for the same groups (χ2=19.76, P=0.000); H.pylori antigens were located in the mucus layer and above the neck of the mucosal gland in 9 of 12 (75.0%) cases with chronic superficial gastritis, at the neck of the mucosal gland and the isthmus in 12 of 22 (54.5%) cases with precancerous changes, below the isthmus in 9 of 13 (69.2%) cases with gastric cancer (x2=25.30, P=0.000). In the H. pylori negative group, no H.pylori antigen was observed. Conclusion: With the progression of chronic superficial gastritis→precancerous changes→gastric cancer, H. pylori antigens progressively migrated from the outer part to the inner part of the cell, and from the superficial to the deep gastric mucosa.  相似文献   

15.
Distribution of H.pylori antigens in gastric mucosa and its significance   总被引:2,自引:0,他引:2  
INTRODUCTION Helicobacter pylori (H.pylori) was grouped as a class I carcinogen by the International Agency for Research on Cancer in 1994. A direct relation be-tween H.pylori infection and gastric carcinogenesis was demonstrated in 1998 in an experimental animal model (Watanabe et al., 1998). However, the role of H.pylori in human gastric carcinogenesis is sup-ported almost exclusively by epidemiological data and prospective histopathological studies. So far the mechanism of H.pylor…  相似文献   

16.
目的:探讨ER与P53蛋白在胃癌中表达的相关性。方法:对119例胃癌标本进行石蜡切片和S-P免疫组织化学染色。结果:ER与P53在胃癌中的表达率分别为66.39%(79/119)和68.07%(81/119),ER与P53蛋白表达呈正相关(rs=0.513)。结论:ER与P53蛋白在胃癌的发生、发展过程中具有互相促进和互相调节的作用。  相似文献   

17.
Objective: To investigate the distribution ofH. pylori antigens in the gastric mucosa in patients withH. pylori infection, and the relationship between the distribution and gastric cancer. Methods: Of 112 patients confirmed by pathological study to have chronic superficial gastritis, precancerous changes (chronic atrophic gastritis, intestinal metaplasia or atypical hyperplasia) and gastric cancer, 28 wereH. pylori negative and 84 wereH. pylori positive.H. pylori antigens in the gastric mucosa were detected by immunohistochemistry. Results: TheH. pylori positive group, comprised 12 of 22 (50.0%) in the chronic superficial gastritis group, 22 of 25 (88.0%) in the precancerous changes group and 13 of 35 (37.1%) in the gastric cancer group. The positive rates ofH. pylori antigens in the cytoplasm progressively increased, respectively at 0.0% (0/12), 63.6% (14/22) and 84.6% (11/13) for the same groups (χ 2=19.76,P=0.000);H. pylori antigens were located in the mucus layer and above the neck of the mucosal gland in 9 of 12 (75.0%) cases with chronic superficial gastritis, at the neck of the mucosal gland and the isthmus in 12 of 22 (54.5%) cases with precancerous changes, below the isthmus in 9 of 13 (69.2%) cases with gastric cancer (χ 2=25.30,P=0.000). In theH. pylori negative group, noH. pylori antigen was observed. Conclusion: With the progression of chronic superficial gastritis→precancerous changes→gastric cancer,H. pylori antigens progressively migrated from the outer part to the inner part of the cell, and from the superficial to the deep gastric mucosa.  相似文献   

18.
为探讨MDM2基因蛋白在胃、食道癌中表达的特点。我们利用SABC免疫组织化学方法,检测了69例食道癌和胃癌标本。结果表明:MDM2总阳性率为56.52%,在食道癌中阳性率为63.47%,胃癌中阳性率为46.42%;在高分化癌组织中阳性率为77.78%;低分化癌阳性率为29.41%;两者差异有显著性(P<0.05)。文中对MDM2基因在以上两种癌组织中表达的意义进行了讨论。  相似文献   

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