Survivin基因在垂体腺瘤中的表达及其与p53基因的关系

应用TUNEL技术和SP法检测8例健康人垂体组织（对照组）和48例垂体腺瘤患者肿瘤组织（观察组）的Survivin和p53基因表达。结果Survivin基因在对照组中不表达；观察组阳性率为66．7％，且侵袭性垂体腺瘤较非侵袭性垂体腺瘤阳性率明显升高，P〈0．05。p53基因在对照组阳性率为12．5％，观察组为62．5％，其中侵袭性阳性率较非侵袭性明显升高，并且垂体腺瘤组织中p53基因和Survivin基因呈正相关性（r=0．63，P〈0．05）。提示Survivin基因在垂体腺瘤的发生、发展中起一定作用，其侵袭性强，预后不良；与p53基因的异常表达密切相关。     

非小细胞肺癌组织中VEGF、p16及p53蛋白的表达及意义

目的探讨血管内皮细胞生长因子（VEGF）、p16蛋白及p53蛋白在非小细胞肺癌（NSCLC）发生、发展中的作用。方法应用免疫组化SP法检测82例非小细胞肺癌组织中VEGF、p16及p53表达。结果p53、p16及VEGF总阳性表达率分别为42．7％、45．1％和32．9％。有淋巴结转移者VEGF阳性率显著高于无转移者（P〈0．05）。肺鳞癌中p16与P53同时表达异常（p16阴性表达、p53阳性表达）者VEGF阳性率高于其它表型（P均〈0．05）。p16、p53的异常表达在有淋巴结转移者中分别为34．6％、50．9％,无淋巴结转移者中分别为66．7％、25．9％（P均〈0．05）。p16和p53的异常表达在Ⅲ期患者中的阳性率分别为51．7％和60．O％,在Ⅰ和Ⅱ期分别为58．％和24．4％（P均〈0．05）。结论NSCLC血管生成与p16和p55表达异常有关。     

非小细胞肺癌组织中凋亡抑制蛋白Livin的表达及意义

目的 研究肺癌相关Livin基因在非小细胞肺癌(NSCLC)组织中的表达以及与p53基因的关系.方法 采用RT-PCR方法检测48例NSCLC组织Livinα mRNA的表达,用免疫组化SABC法检测livin和p53蛋白在48例NSCLC患者肺癌组织切片中的表达.结果 48例NSCLC中15例检测到Livinα mRNA表达,其阳性表达率为31.3%,而正常肺组织和癌旁及良性疾病肺组织均未检测到Livinα mRNA表达.Livin蛋白在腺癌、低分化癌、有淋巴结转移者中的表达阳性率明显高于鳞癌和大细胞癌、高中分化癌和无淋巴结转移者(P＜0.01),而癌旁组织和良性疾病肺组织未检出阳性表达.Livinα mRNA表达与p53呈正相关(r=0.457,P＜0.01);livin蛋白表达与p53呈正相关(r=0.563,P＜0.01).结论 Livin在NSCLC组织中高表达,可能成为肺癌诱导凋亡治疗的新靶点.     

Survivin蛋白在非小细胞肺癌中表达的研究

目的探讨Survivin、突变型P53、Bcl-2蛋白在非小细胞肺癌组织中的表达及其三者之间的关系。方法用链霉菌生物素蛋白-过氧化物酶免疫组织化学法(SP法)检测71例手术切除的非小细胞肺癌(NSCLC)组织和30例正常肺组织中Survivin、突变型P53、Bcl-2蛋白的表达;用原位末端标记(TUNEL)法检测凋亡指数(AI)。结果在NSCLC组织中Survivin、突变型P53、Bcl-2蛋白的表达率分别为61.97%、52.52%、22.54%;30例正常肺组织中无Survivin、突变型P53蛋白表达(P<0.001),Bcl-2蛋白表达率为3.33%(P<0.005);肺癌Survivin阳性、阴性表达组织、正常肺组织的平均凋亡指数分别为11.86±4.67‰、18.67±7.93‰、23.32±6.98‰,肺癌Survivin阳性表达组织与正常肺组织的平均AI相比(P<0.001),肺癌Survivin阴性表达组织与正常肺组织的平均AI相比(P<0.05),差异有显著的统计学意义。结论Survivin蛋白在肺癌组织中的表达,提示该凋亡抑制蛋白在肺癌的发生发展中起抑制癌细胞凋亡的重要作用,AI显示出了Survivin蛋白的抗凋亡作用,Survivin基因有望成为基因治疗的新靶点。     

survivin基因在非小细胞肺癌中的表达及与P53、c-myc、k-ras蛋白表达的关系

目的：探讨survivin基因在非小细胞肺癌（NSCLC）中的表达,及与P53、c-myc、k-ras蛋白表达的相互关系。方法：逆转录PCR法检测了76例NSCLC肿瘤组织,20例良性瘤样病变和21例病灶旁正常肺组织survivin mRNA表达,免疫组织化学法检测P53,c-myc,k-ras蛋白表达,并将结果进行了相关分析。结果：61％NSCLC癌组织表达survivin mRNA基因,而良性瘤样病变和正常组织则分别为30％和19％（P＜0．001）。survivin基因表达与肺癌组织细胞类型,分化程度,TNM分期及淋巴结转移无明显相关关系。P53蛋白,c-myc与survivin基因表达显著相关,k-ras蛋白表达与survivin基因表达未见明显相关。结论：（1）survivin基因在肺癌组织中表达上调,提示该基因对NSCLC发生发展起重要作用。Survivin基因有望成为肺癌基因治疗的新靶点。（2）抑癌基因P53的失活和癌基因c-myc的上调与survivin基因的表达可能在NSCLC癌变中起协同作用。survivin和k-ras基因则可能通过各自不同的机制参与NSCLC的发病机制。     

p57KIP2 mRNA在非小细胞肺癌中的表达及临床意义

选取石蜡包埋的44例非小细胞肺癌（NSCLC）患者及12例癌旁肺正常组织的标本制作组织芯片，用地高辛标记的探针、原位杂交法检测p57^KIP2 mRNA的表达情况。发现p57^KIP2 mRNA在癌旁肺正常组织和NSCLC组织中的表达元显著差异（P〉0．05）。鳞癌中阳性表达率明显高于腺癌（P〈0．01），NSCLC中无淋巴结转移者阳性表达率明显高于有淋巴结转移者（P〈0．01）。p57^KIP2 mRNA的表达有望成为监测NSCLC患者病情发展及评价预后的有用指标。     

非小细胞肺癌组织中stathmin、p53蛋白表达及其临床意义

目的探讨非小细胞肺癌（NSCLC）组织中stathmin、p53表达及其对肿瘤预后和辅助化疗方案的预测作用。方法应用免疫组化二步法检测56例NSCLC组织中的stathmin、p53,并与炎性假瘤对照（良性组）。对其中行根治术后用含紫杉类辅助化疗的32例NSCLC患者的预后进行分析。结果NSCLC组织中stathmin、p53表达阳性率分别为46．43％、35．71％,显著高于良性组（P〈0．05）。stathmin、p53均在低分化和有淋巴转移的NSCLC中表达明显（P〈0．05）。32例术后化疗患者中,stathmin、p53全阳性者的生存率较全阴性者低（P〈0．05）。结论stathmin、053均呈阳性表达预示着NSCLC的恶性程度较高,对含紫杉醇类化疗药物的敏感性较差,术后预后较差。     

PTEN蛋白表达在非小细胞肺癌的临床意义研究

目的探讨PTEN蛋白在非小细胞肺癌（NSCLC）中的表达及生物学和临床意义。方法应用免疫组织化学法检测60例NSCLC组织中PTEN基因蛋白的表达,20例肺良性病变组织中PTEN基因蛋白的表达。结果PTEN蛋白在NSCLC中的总阳性表达率高于肺良性病变组织,两者比较差异有统计学意义（P〈0．01）;PTEN蛋白表达随NSCLC临床分期增加呈下降趋势,但三组之间比较差异无统计学意义（P〉0．05）;PTEN蛋白阳性表达率在NSCLC高中分化组高于低分化组,两者之间比较差异有统计学意义（P〈0．01）,NSCLC无淋巴结转移组PTEN蛋白阳性表达率有淋巴结转移组,两者差异有统计学意义（P〈0．01）,PTEN和nm23-H1蛋白表达与NSCLC患者年龄、性别、组织学分型、肿瘤部位及肿瘤大小均无关（P〉0．05）。结论PTEN蛋白表达与NSCLC的组织分化程度及淋巴结转移有关,NSCLC中PTEN蛋白低表达易发生淋巴结转移,检测PTEN蛋白可在一定程度上评估NSCLC的预后。     

存活素在非小细胞肺癌血管形成中的作用

目的 探讨非小细胞肺癌(NSCLC)、癌旁及肺良性病变组织中存活素(Survivin)的表达及其与血管内皮生长因子(VEGF)和微血管密度(MVD)的相互关系.方法 应用免疫组化(S-P)法检测60例NSCLC组织中Survivin、VEGF及MVD,分析Survivin、VEGF及MVD与NSCLC临床病理特征的关系,以及Survivin、VEGF、MVD间的相互关系.结果 NSCLC组织中Survivin阳性率71.66 %,明显高于癌旁及肺良性病变组织(均P＜0.01) ,其表达与肿瘤分化程度、TNM分期有关.VEGF在肺癌、癌旁及肺良性病变组织中的阳性率分别为65%和15%(P＜0.05 ) ,其表达与肿瘤的T'NM分期及淋巴结转移有关.肺癌、癌旁及肺良性病变组织中MVD值分别为37.21±11.05;18.21±3.83,且MVD值的高低与肿瘤大小、淋巴结转移和T'NM分期有关(P＜0.05 ).Survivin在肺癌组织中的表达与VEGF、MVD密切相关,随着Survivin强度的增加VEGF分级及MVD值亦增加.结论 在NSCLC中Survivin表达明显增高,其表达与肿瘤分化、分期有关;Survivin的过度表达与NSCLC的血管生成有关,细胞凋亡与血管生成在肺癌的发生发展中起协调作用.     

非小细胞肺癌Bcl-2基因蛋白表达及其与细胞凋亡和增殖的关系

目的探讨非小细胞肺癌Bcl-2蛋白表达与细胞凋亡和增殖的关系。方法采用SAB免疫组化法检测43例非小细胞肺癌及20例癌旁正常肺组织石蜡包埋标本Bcl-2蛋白及增殖细胞核抗原（PCNA）表达;用TUNEL法检测细胞凋亡。结果肺癌组织Bcl-2蛋白的表达显著高于癌旁肺组织,P〈0．05;肺癌组织中凋亡指数和增殖指数均明显高于癌旁正常肺组织,P〈0．01,Bcl-2表达阳性的肺癌组织细胞凋亡指数明显低于Bcl-2表达阴性组,P〈0．05;高细胞凋亡、增殖指数提示肺癌预后不良,P〈0．05。结论肺癌存在Bcl-2表达上调,Bcl-2异常表达在肺癌发生过程中可能起重要作用。     

三氧化二砷对人体胃肠癌细胞凋亡及p53、survivin表达的影响

目的研究三氧化二砷（arsenic trioxide,As2O3）在人体内诱导胃肠癌细胞凋亡作用及对凋亡相关基因p53、survivin表达的影响,探讨其抗肿瘤作用及发生机制。方法采用原位末端转移酶标记技术（TUNEL）和免疫组化法分别检测As2O3用药前后胃肠癌细胞凋亡指数和凋亡相关基因蛋白P53、Survivin的表达变化情况。结果 As2O3用药后胃肠癌细胞凋亡指数为（17.04±3.67）%,与用药前（6.07±2.21）%相比差异有统计学意义（P〈0.01）;用药后胃肠癌细胞P53蛋白阳性表达率为（35.05±19.64）%,与用药前（34.80±16.48）%相比差异无统计学意义（P〉0.05）;用药后胃肠癌细胞Survivin蛋白阳性表达率为（15.59±3.94）%,与用药前（36.74±20.5）%相比明显下调,差异有统计学意义（P〈0.01）;As2O3作用后胃肠癌细胞Survivin蛋白表达下调时凋亡率升高,二者之间具有相关性（r=-0.47,P=0.04）。结论 As2O3在人体内可诱导胃肠癌细胞凋亡而发挥抗肿瘤作用,其机制可能与下调survivin基因的表达有关。     

The function of apoptosis and protein expression of bcl-2, p53 and C-myc inthe development of gastric cancer

AIM To understand the rule and possible function of apoptosis and protein expression of bcl-2, p53 and C-myc in chronic gastritis, gastric ulcer, non-classic proliferation of gastric mucosa and gastric cancer.METHODS Apoptosis was detected by using in situ terminal labelling (TUNEL). The protein expression ofbcl-2, p53 and C-myc was detected by immunohistochemical method.RESULTS The indexes of apoptosis in chronic active gastritis, gastric ulcer, mild and severe non-classicproliferation of gastric mucosa, early and progressive gastric cancer were 16.8%±12.3%, 24.1%±20.0%,19.3%±16.4%, 15.7%±15.2%, 10.1%±9.1% and 6.3%±6.0%, respectively. The index of progressivegastric cancer was lower than that of early gastric cancer and non-classic proliferation of gastric mucosa(P<0.05). The positive rate of bcl-2 protein was 9.4%, 27.6%, 52.9%, 75.0%, 83.3% and 46.7%,respectively. The positive rate of bcl-2 of early gastric cancer was higher than that of progressive gastriccancer. The positive rates of p53 protein of severe non-classic proliferation, early and progressive gastriccancer were 25.0%, 33.3% and 63.3%, respectively. The positive rate of p53 of progressive gastric cancerwas higher than that of early gastric cancer and non-classic proliferation (P<0.05). In Lauren types, theindex of apoptosis, protein expression rates of bcl-2, p53 and C-myc of intestinal type were 8.3%±7.2%,38.9%, 77.7% and 56.6%, while that of diffuse type were 5.1%±4.9%, 58.3%, 50.0% and 8.3%,respectively. All markers had statistical difference between two types (P<0.05).CONCLUSION Apoptosis was inhibited stepwise in the development of non-classic proliferation of gastricmucosa to early gastric cancer and then to progressive gastric cancer. The high expression of bcl-2, p53 andC-myc was related to the development of gastric cancer, bcl-2 might play an important role in early gastriccancer while p53 and C-myc act mostly in middle and late stage gastric cancer. The Lauren typing of gastriccancer is closely related to the index of apoptosis and expression of bcl-2, p53 and C-myc.     

Inhibitory effect of tumor suppressor p33(ING1b) and its synergy with p53 gene in hepatocellular carcinoma

AIM: To investigate the inhibitory effect of tumor suppressor p33ING1b and its synergy with p53 gene in hepatocellular carcinoma (HCC). METHODS: Recombinant sense and antisense p33ING1b plasmids were transfected into hepatoma cell line HepG2 with lipofectamine. Apoptosis, G0/G1 arrest, cell growth rate and cloning efficiency in soft agar of HepG2 were analyzed after transfection. In three hepatoma cell lines with different endogenous p53 gene expressions, the synergistic effect of p33ING1b with p53 was analyzed by flow cytometry and luciferase assay was performed to detect the activation of p53 downstream gene p21WAF1/CIP1. In addition, the expression and mutation rates of p33ING1b in HCC tissues were measured by immunohistochemistry and polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP). RESULTS: Overexpression of p33ING1b inhibited cell growth of HepG2, induced more apoptosis and protected cells from growth in soft agar. Combined transfer of p33ING1b and p53 gene promoted hepatoma cell apoptosis, G0/G1 arrest and elevated expression of p21WAF1/CIP1. Immunostaining results showed co-localized P33ING1b with P53 protein in HCC tissues and there was a significant relation between protein expression rates of these two genes (P<0.01). Among 28 HCC samples, p33ING1b presented a low gene mutation rate (7.1%). CONCLUSION: p33ING1b collaborates with p53 in cell growth inhibition, cell cycle arrest and apoptosis in HCC. Loss or inactivation of p33ING1b normal function may be an important mechanism for the development of HCC retaining wildtype p53.     

p53 Protein Expression and Its Relation to the Apoptotic Index in Prostate Adenocarcinoma

Background: Prostate cancer is one of the most commonly diagnosed cancers in males. Tumor suppressor gene p53 plays an important role in causing cell cycle arrest and allowing apoptosis to proceed. Objective: To investigate the expression of p53 protein and its relation to apoptosis and prostate cancer traditional prognostic indicators. Methods: In this study expression of p53 was examined in paraffin-embedded tissues from 50 cases of prostate carcinoma by immunohistochemistry and evaluated using an index of staining. Correlation between p53 expression and apoptosis was detected by TUNEL method. Pathological grade, Gleason score and stage of carcinoma were also determined. Results: P53 expression was observed in 48 of 50 cases (26-100% of tumor cells) with mean staining index of 141±65. A significant association between p53 expression and pathologic grade (r=0.37, p=0.004) and Gleason score (r= 0.4, p=0.009) of patients was observed. Apoptosis was detected in only 6 patients. p53 expression showed no correlation with apoptotic index. No correlation between p53 expression and stage or apoptosis and clinicopathological characteristics of patients was found. Conclusion: p53 expression showed a significant correlation with differentiation status of the prostate carcinoma and can be helpful as a prognostic marker. Decreased level of apoptosis observed in our cases was not correlated with p53 expression indicating the possible role of other regulatory molecules involved in the apoptosis.     

HnRNP A2/B1及p21WAF1蛋白在非小细胞肺癌中表达及意义

目的探讨核内不均一核糖核蛋白A2/B1（hnRNP A2/B1）和p21WAF1蛋白在人非小细胞肺癌（NSCLC）组织中的表达,并进行相关性分析。方法采用免疫组化S-P法检测53例NSCLC组织、40例癌旁组织、7例肺良性病变组织中hnRNPA2/B1和p21WAF1表达。结果 NSCLC组织中hnRNP A2/B1和p21WAF12种蛋白的阳性表达率分别为66.0%和45.2%,显著高于癌旁肺组织和肺良性病变肺组织,差异有统计学意义（P〈0.05）。它们均与分化程度、淋巴结转移有关（P〈0.05）,与组织类型、临床分期无关（P〉0.05）。两种蛋白在NSCLC表达呈显著负相关（P=0.001）。结论 hnRNP A2/B1可能通过下调p21WAF1的表达而缩短细胞周期,促进NSCLC的癌细胞增殖。     

Survivin和Livin蛋白在非小细胞肺癌中的表达及临床意义

目的 研究Survivin和Livin蛋白在非小细胞肺癌(NSCLC)组织中的表达及其临床意义,并分析两者的相关性.方法 用免疫组织化学SP法检测50例NSCLC组织、21例癌旁正常肺组织中Survivin和Livin蛋白的表达水平,并分析其与临床病理特征的关系.结果 Survivin蛋白在NSCLC中的阳性表达率显著高于癌旁正常肺组织(P＜0.05),Livin蛋白在NSCLC中的阳性表达率显著高于癌旁正常肺组织(P＜0.05).Survivin蛋白表达的阳性率与分化程度相关(P＜0.05),Livin蛋白表达的阳性率与淋巴结转移相关(P＜0.05).Survivin和Livin蛋白表达无相关性.结论 Survivin、Livin在NSCLC的发生、发展过程中起着重要的作用,联合检测可为NSCLC的的早期诊断、进一步治疗提供必要的理论依据.     

肺癌患者肺组织和痰标本p53基因突变检测及其临床意义

目的　探讨肺癌患者支气管肺活检组织和痰标本中p5 3基因突变检测在肺癌诊断中意义。方法　应用聚合酶链反应 (PCR) 单链多肽性 (SSCP) 银染法检测 12 0例肺癌和 40例良性肺疾病支气管肺活检组织和痰标本p5 3基因第 5～ 8外显子突变情况。结果　 60例肺癌患者癌组织、癌旁组织和对侧支气管组织p5 3基因突变检出率分别为 60 % (3 6/ 60 )、17% (10 / 60 )和 5 % (3 / 60 ) ,三组间比较差异有显著性 (P <0 .0 0 5 )。 2 0例良性肺疾病支气管肺组织p5 3基因突变检出率为 5 %。故活检组织p5 3基因突变检出肺癌的敏感性为 60 % ,特异性为 95 % ;另外 60例肺癌痰标本p5 3基因突变检出的敏感性为 43 % (2 6/ 60 ) ,特异性为 10 0 %。肺癌痰标本p5 3基因突变联合细胞学检测使肺癌的诊断率从单纯细胞学的 48% (2 9/ 60 )提高到 68% (41/ 60 )。结论　痰标本p5 3基因检测联合细胞学检查可提高肺癌的诊断率     

缺氧诱导因子-1α、血管内皮生长因子和生存素在非小细胞肺癌中的表达及相关性研究

目的:探讨缺氧诱导因子-1α(HIF-1α)、血管内皮生长因子(VEGF)和生存素(survivin)在非小细胞肺癌中的表达及相关性。方法:收集我院收治的病理确诊为非小细胞肺癌患者20例,并分别取其癌组织与癌旁组织。采用免疫组织化学染色法检测癌组织与癌旁组织中HIF-1α、VEGF和生存素的表达。结果:HIF-1α、VEGF和生存素在非小细胞肺癌癌组织中的表达均高于其癌旁组织(P0.05);在癌组织中,HIF-1α与VEGF和生存素表达呈正相关,Spearman相关系数分别为0.519、0.643;而VEGF与生存素表达亦呈正相关,Spearman相关系数为0.643(P0.05)。结论:在非小细胞肺癌癌组织中HIF-1α、VEGF和生存素表达明显高于癌旁组织;HIF-1α可以调节VEFG和生存素的表达,且VEGF和生存素在肿瘤发生、发展过程中可能有一定的协同作用。     

Expression and clinical significance of TAp73α, p53, PCNA and apoptosis in hepatocellular carcinoma

AIM: To study the prognostic role of TAp73α, p53,proliferating cell nuclear antigen (PCNA) and apoptosis in patients with hepatocellular carcinoma (HCC) after surgical tumor ablation.METHODS: Forty-seven human resected HCC tissues and 42 adjacent non-cancerous tissues were studied with 10 normal liver tissues as control group. TAp73α, p53, and PCNA were detected with Elivision immunohistochemistry.Terminal deoxynucleotidyl transferase (TdT)-mediated d-UTP-biotin nick-end labeling (TUNEL) method was used to detect the apoptosis cells. All clinical and pathological materials were analyzed by SPSS10.0statistical package.RESULTS: TAp73α overexpressed in HCC tissues (36.2%)when compared with adjacent non-cancerous tissues(2.38%, P&lt;0.005) and normal liver tissues (0, P&lt;0.01).Mutant type p53 (rot-p53) overexpressed in HCC tissues(38.3%) when contracted with adjacent non-cancerous tissues (16.7%, P&lt;0.05) and normal liver tissues (0,P&lt;0.01). Proliferation index (PI) level in HCC tissues was significantly higher than that in adjacent non-cancerous tissues (30.34%&#177;4.46% vs27.88%&#177;5.89%, t, P= 0.028).Apoptosis index (AI) level in HCC tissues was higher than that in adjacent non-cancerous tissues (8.62%&#177;2.28%vs7.38%&#177;2.61%, t, P = 0.019). Expression of TAp73α was associated with lymph node metastasis and rot-p53,with r = 0.407 and 0.265, respectively. Expression of rot-p53 was associated with Edmondson‘s stage and AFP,with r = 0.295 and -0.357, respectively. In Kaplan-Meier univariant analysis, TAp73α, AFP, TNM stage, portal vein invasion, liver membrane invasion and HBsAg correlated with prognosis (log rank, P= 0.039, 0.012, 0.002, 0.000,0.014, 0.007, respectively). Multivariant Cox regression analysis showed that TAp73α, AFP, TNM stage, portalve in invasion, liver membrane invasion and age were independent factors of prognosis.CONCLUSION: These results suggest that TAp73α can be used as a prognostic indicator of patients with HCC undergoing surgical tumor ablation. AFP, TNM, portal vein invasion, liver membrane invasion and age also have a potency of predicting the prognosis of HCC.     

Alteration of somatostatin receptor subtype 2 gene expression in pancreatic tumor angiogenesis

AIM: To explore the difference of somatostatin receptor subtype 2 (SST2R) gene expression in pancreatic cancerous tissue and its adjacent tissue, and the relationship between the change of SST2R gene expression and pancreatic tumor angiogenesis related genes. METHODS: The expressions of SST2R, DPC4, p53 and ras genes in cancer tissues of 40 patients with primary pancreatic cancer, and the expression of SST2R gene in its adjacent tissue were determined by immunohistochemiscal LSAB method and EnVision(TM) method. Chi-square test was used to analyze the difference in expression of SST2R in pancreatic cancer tissue and its adjacent tissue, and the correlation of SST2R gene expression with the expression of p53, ras and DPC4 genes. RESULTS: Of the tissue specimens from 40 patients with primary pancreatic cancer, 35 (87.5%) cancer tissues showed a negative expression of SST2R gene, whereas 34 (85%) a positive expression of SST2R gene in its adjacent tissues. Five (12.5%) cancer tissues and its adjacent tissues simultaneously expressed SST2R. The expression of SST2R gene was markedly higher in pancreatic tissues adjacent to cancer than in pancreatic cancer tissues (P<0.05). The expression rates of p53, ras and DPC4 genes were 50%, 60% and 72.5%, respectively. There was a significant negative correlation of SST2R with p53 and ras genes (chi(1)(2)=9.33, chi(2)(2)=15.43, P<0.01), but no significant correlation with DPC4 gene (chi(2)=2.08, P>0.05). CONCLUSION: There was a significant difference of SST2R gene expression in pancreatic cancer tissues and its adjacent tissues, which might be one cause for the different therapeutic effects of somatostatin and its analogs on pancreatic cancer patients. There were abnormal expressions of SST2R, DPC4, p53 and ras genes in pancreatic carcinogenesis, and moreover, the loss or decrease of SST2R gene expression was significantly negatively correlated with the overexpression of tumor angiogenesis correlated p53 and ras genes, suggesting that SST2R gene together with p53 and ras genes may participate in pancreatic cancerous angiogenesis.