胃癌组织Maspin,uPA,MMP-7表达的意义

目的:观察胃癌及正常胃黏膜Maspin,uPA, MMP-7表达的意义．方法:应用免疫组化SP法检测胃管状腺癌30 例,胃印戒细胞癌30例,正常胃黏膜组织20例中Maspin,uPA,MMP-7的表达情况．结果:在胃管状腺癌中Maspin,uPA,MMP-7 阳性表达率分别为50％,70％和80％;胃印戒细胞癌中阳性表达率分别为46．7％,76．7％和 90％;正常胃黏膜组织中阳性表达率分别为 90％,35％和30％．Maspin的表达与浸润深度、淋巴结转移相关,而与肿块的大小和TNM分期无关．uPA和MMP-7的表达与浸润深度、淋巴结转移、TNM分期相关,而与肿块的大小无关．Maspin的表达与uPA和MMP-7的表达呈负相关(P=0．012,r=-0．322;P=0．008,r= -0．341);uPA的表达与MMP-7的表达呈正相关 (P=0．034,r=0．274)．结论:Maspin在胃癌中表达下调,uPA和 MMP-7在胃癌中过表达,他们在胃癌的浸润转移中起重要作用,可作为反应胃癌病理生物学行为的有效指标．     

Correlative studies on uPA mRNA and uPAR mRNA expression with vascular endothelial growth factor, microvessel density, progression and survival time of patients with gastric cancer

AIM: TO investigate the correlations between the expression of urokinase-type plasminogen activator (uPA) mRNA, uPA receptor (uPAR) mRNA and vascular endothelial growth factor (VEGF) protein and clinicopathologic features, microvessel density (MVD) and survival time. METHODS: In situ hybridization and immuno-histochemistry techniques were used to study the expressions of uPA mRNA, uPAR mRNA, VEGF and CD34 protein in 105 gastric carcinoma specimens. RESULTS: Expressions of uPA mRNA, uPAR mRNA and VEGF protein were observed in 61 (58.1%) cases, 70 (66.7%) cases and 67 (63.8%) cases, respectively. The uPA mRNA and uPAR mRNA positive expression rates in infiltrating-type cases (73.7%, 75.4%), stageⅢ-Ⅳ(72.1%, 75.4%), vessel invasion (63.2%, 69.9%), lymphatic metastasis (67.1%, 74.4%) and distant metastasis (88.1%, 85.7%) were significantly higher than those of the expanding-type (X2= 15.57, P= 0.001; X2=6.91, P=0.046), stageⅠ-Ⅱ(X2 = 19.22, P = 0.001; X2= 16.75, P= 0.001), non-vessel invasion (X2 = 11.92, P = 0.006; X2 = 14.15, P = 0.002), non-lymphatic metastasis (X2 = 28.41, P = 0.001; X2= 22.5, P=0.005) and non-distant metastasis (X2 = 12.32, P= 0.004; X2= 17.42, P = 0.002; X2 = 11.25, P = 0.012; X2 = 18.12, P = 0.002).The VEGF positive expression rates in infiltrating-type cases (75.4%), stageⅢ-Ⅳ(88.5%), vessel invasion (82.9%), lymphatic metastasis (84.3%) and distant metastasis (95.2%) were significantly higher than those of the expanding-type (X2 = 9.61, P = 0.021), stage I-II (X2=16.66, P = 0.001), non-vessel invasion (X2= 29.38, P = 0.001), non-lymphatic metastasis (X2 = 18.68, P = 0.005), and non-distant metastasis (X2= 22.72, P = 0.007; X2 = 21.62, P = 0.004). The mean MVD in the specimens positive for the uPA mRNA, uPAR mRNA and VEGF protein was markedly higher than those with negative expression groups. Moreover, a positive relation between MVD and uPA mRNA (rs = 0.199, P = 0.042), uPAR mRNA (rs = 0.278, P = 0.035), and VEGF (rs = 0.398, P = 0.048) expressions was observed. The mean survival time in cases with positive uPA mRNA, uPAR mRNA and VEGF protein expression or MVD value≥54.9 was significantly shorter than those in cases with negative expression or MVD value < 54.9. CONCLUSION: uPA and uPAR expressions are correlated with enhanced VEGF-induced tumor angiogenesis and may play a role in invasion and nodal metastasis of gastric carcinoma, thereby serving as prognostic markers of gastric cancer.     

Relationship between the expression of iNOS,VEGF,tumor angiogenesis and gastric cancer

AIM：To in vestigate the relationship between the expression of inducible nitric oxide synthase(iNOS),vascular endothelial growth factor(VEGF),the microvascular density(MVD)and the pathological features and clinical staging of gastric cancer.METHODS:Immunohistochemical staining was used for detecting the expression of iNOS and VEGFin46resected specimens of gastric carcinoma;the monoclonal antibody against CD34 was used for displaying vascular endothelial cells,and MVD was detected by counting of CD34-positive vascular endothelial cells.RESULTS:Of 46resected specimens of gastric carcinoma,the rates of expressions of iNOS and VEGF were 58.70%and76.09%,respectively,and MVDaveraged55.59&#177;19.39,Judged by the standard TNM criteria,the rate of expression of iNOS in stageⅣ（84.46%)was higher than those in stageⅠ,Ⅱ,Ⅲ（Fish exact probabilities test,P=0.019,0.023and 0.033,respectively);the rates of expression of VEGFin stage Ⅲ,Ⅳ（76.0%,92.31%,respectively)were higher than those in stageⅠ,Ⅱ（Fis exact probabilities test,P=0.031,0.017,0.022and0.019).MVDs in stageⅢ,Ⅳ（64.72&#177;14.96,67.09&#177;18.29,respectively)were higher than those in stageⅠ,Ⅱ(t\2.378,4.015,2.503and2.450,P&lt;0.05,P&lt;0.001,P&lt;0.001,P&lt;0.05,respectively),In37gastric carcinoma specimens with lymph node metastasis,MVD(68.69&#177;18.07)and the rates of expression of iNOS and VEGF(70.27%,83.78%,respectively)were higher than those in the specimens with absence of metastasis(t=2.205,X^2=6.3587,X^2=6.2584,P&lt;0.01,P&lt;0.05,P&lt;0.05,respectively),MVD and the expressions of iNOS and EGF were not correlated to the location,size or grade of tumor,nor with the depth of invasion of tumor;MVDs in the positive iNOS and VEGF specimens(59.88&#177;18.02,58.39&#177;17.73,repectively)were higher than those in the negative iNOS and VEGF specimens(X^2=6.3587and 6.1574,P&lt;0.05,P&lt;0.05,respectively);thus the expressions of iNOS and VEGF was correlated to MVD,but the expression of iNOS was not correlated to that of VEGF,In addition.of the 46 surviving patients,the 5-year survival rate of patients with positive iNOS or VEGF tumors was significantly less than that of patients with negative iNOS-or VEGF tumors(X^2=4.3842and 5.4073,P&lt;0.05,P&lt;0.05.respectively).CONCLUSION:The expressions of iNOS and VEGF are colosely related to tumor angiogenesis,and are involved in the advancement and the lymph node metastasis;thusMVD and the expressions of iNOS and EGF may serve indexes for evaluating staging of gastric carcinoma and forecasting its risk of metastasis,which will help establish a comprehensive therapeutical measure of post-operative patients and provide a new approach to tumor therapy.     

Correlation between serum levels of interleukin-6 and vascular endothelial growth factor in gastric carcinoma

BACKGROUND AND AIM: Vascular endothelial growth factor (VEGF) and interleukin-6 (IL-6) are associated with the disease status of gastric carcinoma. However, their relationship remains unclear. This study aims to determine and correlate serum levels of VEGF and IL-6 in gastric carcinoma. METHODS: A total of 107 patients receiving gastrectomy entered this study. Serum levels of VEGF and IL-6 were measured by using ELISA, and were analyzed by using the Student's t-test to compare means and by Pearson correlation analysis to calculate correlation coefficients with respect to pathological characteristics including depth of tumor invasion, Laurén's classification, tumor location, Borrmann classification, and the status of lymph node metastasis. RESULTS: Serum VEGF levels were significantly higher in patients with mixed type carcinoma (387.5 +/- 176.9 vs 255.3 +/- 154.1 pg/mL, P = 0.047) or lymph node metastasis (339.1 +/- 205.1 vs 223.2 +/- 197.4 pg/mL, P = 0.007). Serum IL-6 levels were significantly higher in patients with Borrmann type IV carcinoma, compared with Borrmann type II and III carcinoma. In general, no correlation was noted between serum VEGF levels and IL-6 levels (r = 0.142, P = 0.145), but significant correlation was found in patients with early gastric carcinoma (r = 0.627, P = 0.004) or mixed type carcinoma (r = 0.804, P = 0.016). CONCLUSIONS: This study supports the correlation between serum VEGF and IL-6 levels in distinct subsets of gastric carcinoma patients, and indicates that IL-6 may play a role for the angiogenesis of gastric carcinoma via modulation of VEGF.     

Tnactivation of PTEN is associated with increased angiogenesis and VEGF overexpression in gastric cancer

AIM: To investigate the expression of PTEN/MMAC1/TEP1and vascular endothelial growth factor (VEGF), their roles in biologic behavior and angiogenesis and their association in gastric cancer.METHODS: Immunohistochemical staining was used to evaluate the expression of PTEN, VEGF and microvascular density (MVD) on paraffin-embedded sections in 70 patients with primary gastric cancer and 24 patients with chronic superficial gastritis (CSG). Expression of PTEN, VEGF and MVD were compared with clinicopathological features of gastric cancer. The relationship between expression of PTEN, VEGF and MVD as well as the relationship between PTEN and VEGF expression in caner cells were investigated.RESULTS: PTEN expression significantly decreased (t= 3.98,P＜0.01) whereas both VEGF expression and MVD significant increased (t = 4.29 and 4.41, respectively, both P＜0.01)in gastric cancer group compared with CSG group. PTEN expression was significantly down-regulated (t = 1.95,P＜0.05) whereas VEGF expression (t = 2.37, P＜0.05) and MVD (t = 3.28, P＜0.01) was significantly up-regulated in advanced gastric cancer compared with early-stage gastric cancer. PTEN expression in gastric cancer showed a negative association with lymph node metastasis (t= 3.91, P＜0.01),invasion depth (t= 1.95, P＜0.05) and age (t= 4.69, P＜0.01).MVD in PTEN-negative gastric cancer was significantly higher than that in PTEN-positive gastric cancer (t = 3.69,P＜0.01), and there was a negative correlation between PTEN expression and MVD (γ = -0.363, P＜0.05). VEGF expression was positively associated with invasion depth (especially with serosa invasion, t = 4.69, P＜0.01), lymph node metastasis (t= 2.31, P＜0.05) and TNM stage (t= 3.04,P＜0.01). MVD in VEGF-positive gastric cancer was significantly higher than that in VEGF-negative gastric cancer (t = 4.62,P＜0.01), and there was a positive correlation between VEGF expression of and MVD (γ = 0.512, P＜0.05). VEGF expression in PTEN-negative gastric cancer was significantly stronger than that in PTEN-positive gastric cancer (t = 2.61,P＜0.05), and there was a significantly negative correlation between the expression of VEGF and PTEN (γ = -0.403,P＜0.05).CONCLUSION: Our results imply that inactivation of PTEN gene and over-expression of VEGF contribute to the neovascularization and progression of gastric cancer. PTENrelated angiogenesis might be attributed to its up-regulation of VEGF expression. PTEN and VEGF could be used as the markers reflecting the biologic behaviors of tumor and viable targets in therapeutic approaches to inhibit angiogenesis of gastric cancers.     

胃癌组织中KISS-1和MMP-9的表达及其意义

目的探讨肿瘤转移抑制基因K ISS-1及基质金属蛋白酶9（MMP-9）与胃癌侵袭、转移的关系,为研究胃癌的转移机制及治疗提供理论基础。方法采用逆转录聚合酶链反应（RT-PCR）检测36例胃癌组织及36例正常胃组织中K ISS-1 mRNA及MMP-9 mRNA的表达情况,分析其与胃癌患者各临床病理指标的关系及二者的相关性。结果 K ISS-1 mRNA在胃癌组织中的阳性表达率及表达水平均低于正常胃组织（P均〈0.01）,并且其低表达与淋巴结转移密切相关（P〈0.05）;MMP-9 mRNA在胃癌组织中的阳性表达率及表达水平均高于正常胃组织（P均〈0.05）,MMP-9 mRNA的高表达与癌的浸润深度和淋巴结转移密切相关（P均〈0.05）;K ISS-1与MMP-9表达呈负相关（P〈0.05）。结论 K ISS-1表达缺失和MMP-9过表达可能与胃癌的侵袭相关。     

胃癌组织中MTA1,PTEN,E-cadherin的表达及其相互关系

目的:观察MTA1,PTEN,E-cadherin蛋白在胃癌和正常胃黏膜组织中的表达,探讨其与胃癌浸润、转移和生物学行为的关系.方法:应用免疫组织化学方法检测54例胃癌手术切除标本和15例正常胃黏膜组织中MTA1,PTEN,E-cadherin的表达.各指标之间相关因素的差异性比较采用χ2检验,相关性研究采用Spearman相关分析:结果:与正常胃组织相比,MTA1蛋白在胃癌组织中高表达(46.3% vs 6.7%,P＜0.01),PTEN和E-cadherin蛋白在胃癌组织中表达下调或缺失(51.9% vs 100%,42.6% vs 100%,均P＜0.01).MTA1和PTEN的阳性表达率与肿瘤浸润深度(P=0.003,P=0.001)、病理分期(P=0.004,P=0.008)、淋巴转移(P=0.000,P=0.001)、远隔转移(P=0.004,P=0.006)、临床分期有关(P=0.001,P=0.000);E-cadherin的正常表达率与肿瘤浸润深度(P=0.027)、病理分化程度(P=0.006)、淋巴转移(P=0.044)、临床分期有关(P=0.000).Spearman相关分析显MTA1与PTEN蛋白、MTA1与E-cadherin蛋白的表达呈负相关(r=-0.518,r=-0.424,均p＜0.05).PTEN蛋白与E-cadherin蛋白的表达呈正相关(r=0.53,P＜0.05).结论:MTA1蛋白水平高表达和PTEN,E-cadherin蛋白水平低表达可能与胃癌浸润和转移有关,且联合检测可以用于判断胃癌的生物学行为.     

SOCS2和STAT3蛋白的表达及其与胃癌生物学行为的关系

目的:探讨SOCS2和STAT3蛋白在胃癌组织中的表达及其与胃癌生物学行为的关系.方法:应用免疫组织化学方法检测55例胃癌组织和55例正常胃组织中SOCS2和STAT3蛋白的表达情况,并分析二者与胃癌分化程度、淋巴结转移、浸润深度和临床分期及患者性别、年龄之间的关系,同时分析二者的相关性.结果:SOCS2在胃癌组织中的阳性表达率为25.5%,明显低于正常胃组织中的91.1%(P<0.05),且表达与分化程度、淋巴结转移、临床分期相关(P<0.05);STAT3在胃癌组织中的阳性表达率为72.7%,明显高于正常组织的18.2%(P<0.05),且表达与分化程度、淋巴结转移、浸润深度和临床分期相关(P<0.05),SOCS2与STAT3的表达呈负相关(r=-0.486,P<0.01).结论:SOCS2在胃癌组织中低表达,STAT3异常活化可促进细胞的过度增殖,促进胃癌的发展,二者的相互调节在胃癌发生发展中起重要作用.     

LOX、VEGF在胃癌进展中的作用关系

目的探讨赖氨酰氧化酶(lysyl oxidase,LOX)、血管内皮因子(vascular endothelial growth factor,VEGF)在胃癌进展中的作用关系。方法收集手术切除的新鲜胃癌组织65例,采用Western blotting方法检测胃癌组织中的LOX、VEGF蛋白表达,并比较二者在T1T2与T3T4胃癌组织、有无淋巴结转移胃癌组织中的关系。结果 (1)LOX在T3T4胃癌中的相对表达量为0.6003±0.1279,在T1T2胃癌中的相对表达量为0.4278±0.1437,差异有统计学意义(P0.05);(2)VEGF在T3T4胃癌中的相对表达量为0.6975±0.1639,在T1T2胃癌中的相对表达量为0.4263±0.1128,差异有统计学意义(P0.05);(3)LOX在伴有淋巴结转移的胃癌中的相对表达量为0.6827±0.1987,在无淋巴结转移的胃癌中的相对表达量为0.4235±0.1763,差异有统计学意义(P0.05);(4)VEGF在伴有淋巴结转移的胃癌中的相对表达量为0.6769±0.1659,在无淋巴结转移的胃癌中的相对表达量为0.4128±0.1471,差异有统计学意义(P0.05);(5)在T1T2和T3T4胃癌组织中,LOX与VEGF的表达水平呈正相关(r=0.735,P0.05),在有淋巴结转移和无淋巴结转移的胃癌组织中,LOX与VEGF的表达水平也呈正相关(r=0.914,P0.05)。结论 T3T4胃癌中LOX与VEGF的表达水平明显高于T1T2胃癌,在有淋巴结转移的胃癌组织中,LOX与VEGF的表达水平明显高于无淋巴结转移的胃癌组织中,且LOX与VEGF表达呈正相关;LOX与VEGF在胃癌的进展中有促进作用,并且相互协同。     

Significance of expression of heat shock protein90α in human gastric cancer

AIM: To evaluate the significance of hsp90α expression in human gastric cancer tissues. METHODS: Immunohistochemical staining was used in clinical specimens from 33 cases of gastric cancer and 33 cases of gastritis with rabbit anti-human hsp90α multi-clonal antibody in order to explore the relationship between the expression of hsp90α in gastric carcinoma tissue and gastritis tissue as well as in mucous membrane adjacent to cancer and lymph node metastasis.RESULTS: Hsp90α was detected in 88% of gastric carcinoma cases and 55 % of gastritis cases. The hsp90α positive rate in gastric cancer group was significantly higher than that in gastritis group (P&lt;0.01, P=0.005). The hsp90α positive rate in gastric cancer and in mucous membrane adjacent to cancer was 88% and 55 % respectively (P&lt;0.01,P=0.005). The hsp90α positive rate in lymph node metastasis group and non-lymph node metastasis group was 100% and 60% respectively, and a significant correlation between hsp90α expression and lymph node metastasis was shown (P&lt;0.01,P=0.005). CONCLUSION: The hsp90α expression rate in gastric cancer group was significantly higher than that in gastritis group as well as that in the group of mucous membrane adjacent tocancer. The hsp90α expression in lymphatic node metastasis group was higher than that in non-lymphatic node metastasisgroup. The results indicate that increased hsp90α expression has a close relationship with occurrence and lymph node metastasis of gastric cancer.     

Significance of vascular endothelial growth factor expression and its correlation with inducible nitric oxide synthase in gastric cancer

AIM:To investigate the clinical significance of theexpression of VEGF_(165)mRNA and the correlation withvascular endothelial growth factor (VEGF) protein andinducible nitric oxide synthase (iNO) in human gastriccancer.METHODS:We tested VEGF_(165)mRNA expression in 31 casesof resected gastric cancer specimens and normal pairedgastric mucosae by RT-PCR.Total RNA was extracted withTRIzol reagents,transcribed into cDNA with oligo (dT_(15))priming,inner controlled with β-actin expression andagarose gel isolated after PCR.VEGF expression wasquantitated with IS1000 imaging system.Meanwhile wealso examined expression levels of VEGF protein and iNOSin 85 cases of gastric cancer.All paraffin-embeddedsamples were immunohistochemically stained by streptavidin-peroxidase method (SP).RESULTS:The mean expression of VEGF_(165)mRNA ingastric cancer was 1.125±0.356,significantly higher thanthat of normal paired mucosae,which was 0.7604±0.278.The data indicated that the expression level ofVEGF_(165)mRNA was well related to lymph node metastasisand TNM stages of UICC.The expression levels in patientswith lymph node metastasis and without lymph nodemetastasis were 1.219±0.377 and 0.927±0.205 respectively(P<0.05).The expression in stages Ⅰ,Ⅱ,Ⅲ,Ⅳ was0.934±0.194,1.262±0.386 respectively (P<0.01).Furtheranalysis showed the lymph node metastasis rate in thegroup with over-expression of VEGF was higher than thatin the group with low expression of VEGF (83.3% vs 46.2%),and the ratio of stage Ⅲ Ⅳ in the group with over-expression of VEGF was also higher than that in the groupwith low expression with VEGF (77.8% vs 33.8%) (P<0.05).The positive rates of expression of VEGF protein and iNOSin 85 cases of gastric cancer were 75.4% and 58.8%respectively,and 50.1% of the patients showed positivestaining both for iNOS and VEGF,the correlation with thetwo factors was significant (P=0.018).But more intensive analysis showed the immunoreactive grades of VEGF werenot associated with that of iNOS.CONCLUSIONS:The expression of VEGF_(165)mRNA is wellrelated with lymph node metastasis and TNM stages of UlCCin gastric cancer,and is concerned with the invasivenessand metastasis of gastric cancer.The relationship can beobserved between the expression of VEGF and iNOS in gastriccancer.     

Effect of VEGF,P53 and telomerase on angiogenesis of gastric carcinoma tissue

Objective:To investigate the effect of vascular endothelial growth factor(VEGF),P53 and telomerase on angiogenesis in gastric carcinoma tissue.Methods:A total of 95 surgical resection samples of gastric cancer tissue after pathological diagnosis are collected to observe the VEGF,P53 and telomerase expression using immunohistochemical methods.Relationship between their expression and its influence on angiogenesis in gastric carcinoma tissue were analyzed.Results:Microvascular density(MVD)and the expression of VEGF,P53 and telomerase were positively correlated.Expression of VEGF and P53 protein were related to tumor type and lymph metastasis,and also a correlation was observed between P53 and VEGF.The telomerase expression had no correlation with VEGF,and P53.Conclusions:VEGF angiogenesis has a angiogenesis promoting effect on gastric cancer tissue development and plays an important role in tumor generation and metastasis.Mutant P53 promotes the tumor angiogenesis generation by adjusting VEGF.Telomerase has a certain role in promoting activity of angiogenesis through different way rather than P53.     

Significance of vascular endothelial growth factor expression and its correlation with inducible nitric oxide synthase in gastric cancer

AIM:To investigate the clinical significance of the expression of VEGF165mRNA and the correlation with vascular endothelial growth factor(VEGF) protein and inducible nitric oxide synthase (iNO) in human gastric cancer.METHODS:We tested VEGF165mRNA expression in 31 cases of resected gastric cancer specimens and normal paired gastric mucosae by RT-PCR.Total RNA was extracted with TRIzol reagents,transcribed into cDNA with gligo (dT15) priming,inner controlled with β-actin expression and agarose gel isolated after PCR.VEGF expression was quantitated with IS1000 imaging system.Meanwhile we also examined expression levels of VEGF protein and iNOS in 85 cases of gastric cancer.All paraffin-embedded samples were immunohistochimically stained by streptavidin-peroxidase method (SP).RESULTS:The mean expression of VEGF165mRNA in gastric cancer was 1.125&#177;0.356,significantly higher than that of normal paired mucosea,which was 0.760&#177;0.278.The data indicated that the expression level of VEGF165mRNA was well related to lymph node metastasis and TNM stages of UICC.The expression levels in patients with lymph node metastasis and without lhmph node metastasis were 1.219&#177;0.377 and 0.927&#177;0.205 respectively (p&lt;0.05),The expression in stages Ⅰ,Ⅱ,Ⅲ,Ⅳ was 0.934&#177;0.194,1.262&#177;0.386 respectively (p&lt;0.01).Further analysis showed the lymph node metastasis rate in the group with over-expression of VEGF was higher than that in the group with low expression of VEGF(83.3% vs 46.2%),and the ratio of stage Ⅲ+Ⅳ in the group with over-expression of VEGF was also higher than that in the group with low expression with VEGF (77.8% vs 33.8%)(p&lt;0.05).The positive rates of expression of VEGF protein and iNOS in 85 cases of gastric cancer were 75.4% and 58.8% respectively,and 50.1% of the patients showed positive staining both for iNOS and VEGF,the correlation with the two tactors was significant (p=0.018).But more intensive analysis showed the immunoreactive grades of VEGF were not associated with that of iNOS.CONCLUSIONS:The expression of VEGF165mRNA is well related with lymph node metastasis and TNM stages of UICC in gastric cancer of gastric cancer.The relationship can be observed between the expression of VEGF and iNOS in gastric cancer.     

maspin、p27、skp2在大肠肿瘤的表达及意义

目的:探讨大肠癌maspin、p27、skp2的表达, 并探讨其与大肠癌发生、发展的关系．方法:应用免疫组化SP法检测30例结肠管状腺癌、20例结肠腺瘤、20例正常大肠黏膜组织中maspin、p27、skp2的表达情况．结果:30例管状腺癌中maspin、p27、 skp2阳性表达率分别为83．3％(25/30)、 50％(15/30)、36．7％(11/30);20例结肠腺瘤中maspin、p27、skp2的阳性表达率分别为 95％(19/20)、80％(16/20)、10％(2/20),20例正常切缘中maspin、p27、skp2的表达率分别为 95％(19/20)、90％(18/20)、5％(1/20)．maspin 表达与淋巴结转移(P=0．04)和Duke's分期相关(P=0．014);p27、skp2表达与分化程度相关(P=0．014,P=0．001),而与淋巴结转移、 Duke's分期、肿瘤浸润深度无关．maspin表达与p27表达正相关(r=0．447,P<0.05),与skp2 表达无相关性;p27表达与skp2表达无相关性．结论:maspin、p27在大肠癌中表达降低,skp2 在大肠癌中过表达,可作为反映大肠癌分化程度的指标之一．maspin可能在大肠癌的发生、发展(尤其是淋巴结转移)中起作用,有望成为诊断大肠癌及其发生淋巴结转移的分子生物学标记物之一．     

利用组织芯片技术研究P73和mP53基因编码蛋白在胃癌中的表达及意义

目的:构建胃癌及其癌前病变组织芯片,采用免疫组化方法观察研究P73和mP53基因编码蛋白在胃癌中的表达并探讨其临床病理学意义.方法:收集2003-2004年辽宁省肿瘤医院和中国医大附属一院104例胃癌及癌前病变组织标本构建两个组织芯片蜡块,组织样品直径为1 mm.采用SABC免疫组化方法检测胃癌组织中P73和mP53蛋白的表达,观察分析其与胃癌病理生物学行为的关系.结果:P73基因编码蛋白在胃癌、肠上皮化生、不典型增生病变组织中的阳性表达率显著高于远癌正常胃黏膜(90.1%,44.0%,80.0%vs 17.9%,P＜0.01).Borrman Ⅲ/Ⅳ型胃癌P73蛋白阳性表达率(92.9%/100%)显著高于BorrmanⅡ型胃癌(57.1%)(P＜0.05).伴转移胃癌组P73蛋白阳性表达率(淋巴结转移组94.4%,肝转移组100%,卵巢转移100%)显著高于无转移组(76.2%)(P＜0.05).胃癌组织中P73蛋白表达与mP53蛋白表达密切相关(χ2=9.6736,P＜0.01).结论:P73蛋白表达与胃癌恶性病理生物学行为密切相关,其虽与抑癌基因P53同源,但与mP53蛋白表达呈正相关,提示其可能作为P53的一种模拟突变体在胃癌发生、发展中起作用.