Ki-67、p53在脑胶质瘤中的表达及意义

目的探讨Ki-67和p53与脑胶质瘤分级的关系。方法采用免疫组化SP法检测60例脑胶质瘤标本和10例正常脑组织标本Ki-67和p53的表达。结果 Ki-67和p53在正常脑组织与脑胶质瘤中的表达差异均有统计学意义（Ki-67：χ2=13.081,P=0.004;p53：χ2=11.667,P=0.009）;Ⅰ～Ⅱ级胶质细胞瘤与高度恶性Ⅲ～Ⅳ级胶质细胞瘤Ki-67和p53的表达差异均有统计学意义（Ki-67：χ2=12.589,P=0.006;p53：χ2=12.721,P=0.005）。结论脑胶质瘤中Ki-67及p53的阳性表达率与其恶性度相关,均可作为判断胶质瘤恶性程度的指标。     

IMP3和Ki-67在人脑胶质瘤中的表达及其相关性

目的:探讨胰岛素样生长因子Ⅱ mRNA结合蛋白3（insulin-like growth factor-Ⅱ mRNA-binding protein 3,IMP3）和Ki-67在脑胶质瘤组织中的表达及意义。方法:收集神经外科手术切除后经病理证实的胶质瘤标本126例,另收集脑外伤行内减压术患者的正常脑组织20例作为对照组,采用免疫组化SP法检测IMP3、Ki-67在不同级别胶质瘤组织和正常脑组织中的表达水平;应用Spearman秩相关分析IMP3和Ki-67在胶质瘤组织中表达水平的相关性。结果:IMP3、Ki-67在胶质瘤组织中阳性率为53.17%、56.35%;IMP3、Ki-67在Ⅲ、Ⅳ级胶质瘤中阳性率均高于Ⅱ级(P＜0.05)。免疫组化半定量评分结果显示:正常脑组织和Ⅰ级胶质瘤中IMP3、Ki-67均为阴性表达;Ⅱ级胶质瘤中IMP3、Ki-67阳性表达多为弱阳性;Ⅲ、Ⅳ级胶质瘤中IMP3、Ki-67多数表达为弱阳性、中度阳性和强阳性;Ⅲ 级与Ⅱ级、Ⅳ级与Ⅱ级胶质瘤中IMP3、Ki-67阳性表达率比较,差异有统计学意义(P＜0.05);IMP3、Ki-67阳性表达均与胶质瘤的病变程度密切相关(P＜0.05)。胶质瘤组织中IMP3、Ki-67阳性表达率在不同性别、年龄、肿瘤大小、肿瘤位置和病理类型之间差异均无统计学意义(P＞0.05);IMP3和Ki-67在胶质瘤组织中阳性表达率呈正相关(P＜0.05)。结论:IMP3、Ki-67分别可以有效地反映胶质瘤的病变程度,两者联合诊断可以客观反映胶质瘤病变程度,两者联合检测可能成为胶质瘤生物标记的新指标。     

联合测定hTERT和Ki-67的表达对胶质瘤分级的评价

目的:探讨人脑胶质瘤恶性程度评定的客观标准。方法:采用组织微阵列技术,通过免疫组化的方法对60例不同级别人脑胶质瘤组织的hTERT和Ki-67表达水平进行测定,并与10例正常组织比较。结果:Ⅰ～Ⅱ级、Ⅲ级、Ⅳ级胶质瘤与对照组Ki-67表达阳性细胞标记指数分别为1.90±0.29、8.39±1.26、21.19±3.06与0.35±0.13,各组间差异有统计学意义,P<0.001;hTERT表达阳性细胞标记指数分别为5.30±0.65、28.63±3.59、53.62±4.68与0,各组间差异有统计学,P<0.01。hTERT与Ki-67表达阳性指数显著正相关,r=0.94,P<0.01,hTERT表达水平越高,Ki-67的表达也越高。结论:联合测定Ki-67和hTERT表达水平可以作为评价胶质瘤生物学行为、判断临床预后的重要参考指标。     

人脑胶质瘤组织p57kip2和p16蛋白表达及其临床意义的研究

目的:探讨p57kip2蛋白、p16蛋白在人脑胶质瘤组织中的表达及其临床意义.方法:采用免疫组织化学SP法检测p57kip2、p16在55例人脑胶质瘤和10例正常脑组织中的表达.结果:在55例胶质瘤组织中,p57kip2蛋白阳性率为38.2%(21/55),显著低于正常脑组织80.0%(8/10),P=0.014.p57kip2蛋白表达在低度恶性(Ⅰ～Ⅱ级)组显著高于高度恶性(Ⅲ～Ⅳ级)纽,P=0.029;生存时间≥2年组显著高于<2年组,P=0.032.脑胶质瘤组织中p16蛋白表达阳性率为50.9%(28/55),与正常脑组织相比差异无统计学意义,P=0.051.p16蛋白表达在高度恶性(Ⅲ～Ⅳ级)组显著高于低度恶性(Ⅰ～Ⅱ级)组(P=0.022),生存时间<2年组显著低于≥2年组,P=0.040.p57kip2蛋白的表达与p16蛋白的表达存在正相关,rs=0.388,P=0.003.结论:p57kip2蛋白和p16蛋白在脑胶质瘤中存在异常表达,p57kip2蛋白和p16蛋白的表达程度与脑胶质瘤的分化程度和预后相关.     

人脑胶质瘤组织MGMT和EGFR及Ki-67表达临床意义分析

目的:探讨人脑胶质瘤组织中O6-甲基鸟嘌呤DNA甲基转移酶(MGMT)、表皮生长因子受体(EGFR)和细胞增殖相关核蛋白Ki-67的表达及其相关性。方法:选取64例脑胶质瘤组织标本,采用免疫组织化学染色法检测MGMT、EGFR及Ki-67的表达。结果:MGMT、EGFR、Ki-67总体阳性率分别为76.6%、59.4%和56.3%。在Ⅰ、Ⅱ、Ⅲ、Ⅳ级胶质瘤中,MGMT阳性表达率分别为0、58.8%、70.0%和100.0%;EGFR阳性表达率分别0、41.2%、60.0%和76.0%;Ki-67阳性表达率分别为0、23.5%、65.0%和76.0%。MGMT、EGFR和Ki-67的阳性表达率在脑胶质瘤不同病理分级间差异有统计学意义,P值分别为0.001、0.043和0.002;且三者的表达强度与胶质瘤病理分级呈正相关性,r值分别为0.315、0.273和0.400,P值分别为0.011、0.029和0.001。3种检测指标的阳性表达率与发病年龄及性别均无明显的相关性,差异无统计学意义,P>0.05。分层分析发现,Ki-67的表达与MGMT和EGFR的表达有相关性,r分别为0.296和0.466,P值分别为0.018和0.000。结论:人脑胶质瘤中MGMT、EGFR及Ki-67的表达与病理分级均有相关性,测定三者的表达水平可评价胶质瘤细胞的恶性程度,对胶质瘤预后判断可能有指导作用。     

CyclinD1,P16在胶质细胞瘤进程中的表达及相关性

目的研究CyclinD1,P16在胶质瘤发生发展过程中的表达及相关性.方法采用免疫组织化学LsABC法检测正常脑组织,胶质瘤(Ⅰ～Ⅱ级),胶质瘤(Ⅲ～Ⅳ级)和胶质母细胞瘤组织CyclinD1,P16的表达.结果 CyclinD1表达具有明显趋势性,随着恶性程度的增高(正常脑组织-胶质瘤Ⅰ～Ⅱ级-胶质瘤Ⅲ～Ⅳ级-胶质母细胞瘤),表达呈上升趋势,分别为20%,46.34%,69.64%,88.46%,各组之间比较差异显著(P＜0.01).P16蛋白随病变恶性程度升高表达率降低,正常脑组织为100%,Ⅰ～Ⅱ级组为70.73%,Ⅲ～Ⅳ级组为44.64%,胶质母细胞组为11.54%,各组之间比较有显著性差异(P＜0.01),CyclinD1与P16在胶质瘤中的表达具有显著负相关关系(rs=0.7398,P＜0.01).结论 CyclinD1与P16在胶质瘤恶性进程中,两者表达水平的相关性反映了癌基因与抑癌基因相互协调,相互促进的机制.     

CyclinD1,P16在胶质细胞瘤进程中的表达及相关性

目的　研究CyclinD1,P16在胶质瘤发生发展过程中的表达及相关性。方法　采用免疫组织化学LsABC法检测正常脑组织 ,胶质瘤 (Ⅰ～Ⅱ级 ) ,胶质瘤 (Ⅲ～Ⅳ级 )和胶质母细胞瘤组织CyclinD1,P16的表达。结果　CyclinD1表达具有明显趋势性 ,随着恶性程度的增高 (正常脑组织—胶质瘤Ⅰ～Ⅱ级—胶质瘤Ⅲ～Ⅳ级—胶质母细胞瘤 ) ,表达呈上升趋势 ,分别为 2 0 % ,46 3 4% ,69 64 % ,88 46% ,各组之间比较差异显著 (P <0 0 1)。P16蛋白随病变恶性程度升高表达率降低 ,正常脑组织为 10 0 % ,Ⅰ～Ⅱ级组为70 73 % ,Ⅲ～Ⅳ级组为 44 64 % ,胶质母细胞组为 11 5 4% ,各组之间比较有显著性差异 (P <0 0 1) ,CyclinD1与P16在胶质瘤中的表达具有显著负相关关系 (rs =0 73 98,P <0 0 1)。结论　CyclinD1与P16在胶质瘤恶性进程中 ,两者表达水平的相关性反映了癌基因与抑癌基因相互协调 ,相互促进的机制。     

胶质瘤组织中整合素β1及Ki-67表达的临床意义

目的探讨胶质瘤中整合素β1及Ki-67的表达及其临床意义.方法应用免疫组化方法检测45例胶质瘤、5例正常脑组织中整合素β1及Ki-67的表达.结果在Ⅰ、Ⅱ级和Ⅲ、Ⅳ级胶质瘤中,整合素β1的阳性表达率分别为42.11%(8/19)及73.08%(19/26),差异有统计学意义,χ2=4.388,P=0.036;Ki-67标记指数分别为(7.06±4.17)%和(13.45±8.69)%,差异有统计学意义,t=3.269,P=0.002;且整合素β1的表达与Ki-67标记指数具有正相关关系,r=0.71,P=0.000.结论整合素β1表达上调能促进胶质瘤细胞的增殖及侵袭;整合素β1与Ki-67的表达均可应用于临床,作为评价胶质瘤恶性程度、选择治疗措施及预测患者预后等的重要指标.     

ABCG2在胶质瘤组织中的表达及意义

背景与目的:三磷酸腺苷结合盒转运体成员ABCG2(ATP-binding cassette superfamily G member 2)是源于造血干细胞的标志物之一,其在神经胶质瘤发生发展相关组织和细胞中的表达情况还不清楚.本研究检测ABCG2在不同恶性程度人脑胶质瘤组织标本、裸小鼠移植瘤标本、体外细胞系球体和胶质瘤干细胞球体中的表达情况并分析其意义.方法:制作布有不同恶性程度人脑胶质瘤组织标本、裸小鼠移植瘤标本、体外细胞系球体和胶质瘤干细胞球体等的组织芯片,用免疫组化方法检测ABCG2在组织芯片中的表达情况.结果:在71例人脑胶质瘤组织标本中ABCG2的阳性率为26.8%,其中Ⅰ级11.1%,Ⅱ级8.0%,Ⅲ级43.5%,Ⅳ级42.9%;Ⅰ～Ⅱ级与Ⅲ～Ⅳ级相比差异具有统计学意义(X2=10.710,P=0.001).在神经干细胞、裸小鼠移植瘤、胶质瘤干细胞球体表达率为100%.在多种正常组织中亦有不同程度的表达.在胶质瘤临床标本中ABCG2阳性细胞呈亲血管分布.结论:ABCG2在胶质瘤干细胞、恶性程度高的胶质瘤组织标本和移植瘤组织中高表达,并且呈亲血管分布.     

人脑胶质瘤组织p57^kip2和P16蛋白表达及其临床意义的研究

目的：探讨p57^kip2蛋白、p16蛋白在人脑胶质瘤组织中的表达及其临床意义。方法：采用免疫组织化学SP法检测p57^kip2、p16在55例人脑胶质瘤和10例正常脑组织中的表达。结果：在55例胶质瘤组织中,p57^kip2蛋白阳性率为38．2％（21／55）,显著低于正常脑组织80．0％（8／10）,P=0．014。p57^kip2蛋白表达在低度恶性（Ⅰ～Ⅱ级）组显著高于高度恶性（Ⅲ～Ⅳ级）纽,P=0．029;生存时间≥2年组显著高于〈2年组,P=0．082。脑胶质瘤组织中p16蛋白表达阳性率为SO．9％（28／SS）,与正常脑组织相比差异无统计学意义,P=0．051。p16蛋白表达在高度恶性（Ⅲ～Ⅳ级）组显著高于低度恶性（Ⅰ～Ⅱ级）组（P=0．022）,生存时间〈2年组显著低于≥2年组,P=0．040。p57^kip2蛋白的表达与p16蛋白的表达存在正相关,rs=0．888,P=0．003。结论：p57^kip2蛋白和p16蛋白在脑胶质瘤中存在异常表达,p57^kip2蛋白和p16蛋白的表达程度与脑胶质瘤的分化程度和预后相关。     

Bacteria and cancer--antagonisms and benefits

There is considerable historical and recent evidence concerning the antagonisms between acute bacterial infections or their toxins and cancer and allied diseases. These data provide renewed incentives to undertake clinical programmes with mixed bacterial vaccines in many countries at the present time.     

Religiosity and physical and emotional functioning among African American and White colorectal and lung cancer patients

The literature suggests that religiosity helps cope with illness. The present study examined the role of religiosity in functioning among African Americans and Whites with a cancer diagnosis. Patients were recruited from an existing study and mailed a religiosity survey. Participants (N = 269; 36% African American, 56% women) completed the mail survey, and interview data from the larger cohort was utilized in the analysis. Multivariate analyses indicated that in the overall sample religious behaviors were marginally and positively associated with mental health and negatively with depressive symptoms. Among women, religious behaviors were positively associated with mental health and negatively with depressive symptoms. Religiosity was not a predictor of study outcomes for men. Among African Americans, religious behaviors were positively associated with mental health and vitality. Among Whites, religious behaviors were negatively associated with depressive symptoms. These findings suggest a mixed role of religious involvement in cancer outcomes. The current findings may have applied potential in the areas of emotional functioning and depression.     

Renal irradiation and the pharmacology and toxicity of methotrexate and cisplatinum

We used a rat model to study the effects of renal irradiation on the pharmacology of methotrexate (MTX) and cisplatinum (cis-Pt). Unanesthetized rats were given bilateral kidney irradiation (20 Gy in 9 fractions). At 9 months after irradiation, 3% of the animals had died and survivors showed moderately impaired renal function. At 15 months, 30% of the animals had died and survivors showed severely impaired renal function. Some animals were given i.v. MTX 1 week to 15 months after irradiation. In irradiated rats, the area under the MTX plasma clearance curve equaled that of controls through 6 months, and was significantly above controls from 9 months on. Other animals were given i.p. cis-Pt 1 week to 9 months after irradiation. The acute toxicity of cis-Pt was the same in control and irradiated rats when cis-Pt was given immediately before or after irradiation. Beginning 3 months after irradiation there was a progressive increase in cis-Pt toxicity and a simultaneous decrease in urinary platinum excretion. Irradiated animals that survived cis-Pt treatment showed increased radiation nephritis; the greatest effect occurred when cis-Pt was given 3 months or more after irradiation. MTX and cis-Pt clearance decreased when renal dysfunction was first observed and changes in renal function preceded changes in drug clearance and toxicity.     

VEGF及KDR在大肠腺瘤和腺癌中的表达及意义

目的：探讨VEGF和KDR在大肠腺瘤和大肠腺癌中的表达及临床病理特征的关系。方法：大肠腺瘤和大肠腺癌组织标本各100例,采用免疫组织化学染色法检测VEGF和KDR在标本中的表达情况。结果：VEGF和KDR在大肠腺癌组中的阳性表达明显高于大肠腺瘤组（P〈0.05）;在正常大肠黏膜均未见VEGF和KDR表达的阳性染色;VEGF阳性表达组中KDR的阳性表达率为70%,显著高于VEGF阴性表达组中KDR的阳性表达率16%,两组比较有统计学意义（P〈0.01）。结论：大肠腺癌组织中KDR的表达与肿瘤大小、转移情况、浸润深度密切相关;VEGF和KDR在大肠腺瘤中的表达与患者的年龄、性别及分型均无相关性,而与增生程度相关（P〈0.05）。在大肠腺癌患者中VEGF及KDR表达更高,二者具有协同效应。     

Morphine and tumor growth and metastasis

Morphine is an analgesic widely used to alleviate cancer pain. In addition, the perioperative management of pain in cancer surgery patients most often includes opioids. However, there are reports that these drugs may alter cancer recurrence or metastasis. Several mechanisms have been proposed, such as the modulation of the immune response or cellular pathways that control the survival and migratory behavior of cancer cells. The published literature, however, presents some discrepancies, with reports suggesting that opioids may either promote or prevent the spread of cancer. It is of great importance to determine whether opioids, in particular the most widely used, morphine, may increase the risk of metastasis when used in cancer surgery. This review examines the available data on the effects of morphine which influence cancer metastasis or recurrence, including immunomodulation, tumor cell aggressiveness, and angiogenesis, with special emphasis on recently published clinical and laboratory based studies. We further discuss the parameters that may explain the difference between reports on the effects of morphine on cancer.     

肾上腺素能β受体与肿瘤生长及转移

大量研究表明肿瘤细胞可表达β受体，而一些神经递质、药物和社会心理因素可能通过β受体影响肿瘤的生长和转移，β受体激动剂、β受体阻滞剂以及抑郁等社会心理因素可加强或削弱这种作用。这为表达β受体肿瘤的治疗开辟了新的道路，提供了新的治疗靶点。