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1.
用免疫组织化学方法检测55例大肠癌中抑癌基因p53蛋白的过度表达,以探讨大肠癌的发生与组织学的类型及分化程度的关系。结果显示:p53蛋白的过度表达在大肠癌中为53.8%,而在正常及良性肿瘤中为阴性。按Turbull氏分期,不同分期大肠癌中p53蛋白过度表达阳性率不同,早期癌(Ⅰ-Ⅱ)中为32.1%(9/28);晚期癌(Ⅲ-Ⅳ)中为48.1%(13/27),差异明显(P<0.015),p53蛋白过度表达在不同组织类型中阳性率不同,粘液腺癌中阳性率(41.6%)明显低于管状腺癌(66.6%)和乳头状腺癌(53.3%)的阳性率。其粘液腺癌与管状腺癌的差别较显著(P<0.05)。p53蛋白的过度表达在不同分化程度的大肠癌中阳性率不同,高分化癌中为37.5%,而低分化癌中为75.4%,差异显著(P<0.05)。提示:p53蛋白过度表达可能发生于大肠癌病理过程的较晚阶段,作为大肠癌的预后指标可能有参考价值。  相似文献   

2.
吴佩  袁平 《中国肿瘤临床》1998,25(5):325-328
目的:观察大肠癌患者血清胃泌素及肿瘤组织的GAS表达情况。方法:采用放射免疫及免疫组化技术测定70例大肠癌患者血清胃泌素水平。结果:胃泌素阳性表达率,中、低分化癌比高分化癌为高;粘液腺癌、印戒细胞癌、未分化腺癌较乳头状腺癌和管状腺癌为高,差异均非常显著(P<0.01)。结论:胃泌素阳性细胞过度表达可能是大肠癌分化不良的一个标志,且可能是肿瘤恶性程度增高的原因之一。血清胃泌素测定对诊断大肠癌灵敏度和特异性不高,但由于其升高为癌组织胃泌素阳性表达所致,与肿瘤的分化程度、恶性度、大小及分期密切相关。大肠癌病人术前血清胃泌素水平增高,则提示其肿瘤恶性程度较高,分期较晚,预后不良。  相似文献   

3.
胃癌p53基因与细胞凋亡的检测及其关系的研究   总被引:2,自引:0,他引:2  
目的:研究p53基因与细胞凋亡在胃癌中的检测及其之间的关系。方法:采用p53原因杂交、原位脱氧核糖核酸末端转移酶标记法(TUNEL)和免疫组织化学技术对56例胃癌进行检测。结果:56例胃癌p53蛋白表达48.2%,p53原位杂交567.9%,二者的检测结果不完全一致,但均与胃癌的分期有关。晚期胃癌高于早期胃癌,差异有显著性(P<0.01)。56例胃癌抗凋亡基因bcl-2阳性率为58.9%。TUNEL标记细胞凋亡指数平均为4.78,均与组织学分型和胃癌的分期有关,但又有相反的表达。未发化型腺癌和早期胃癌抗凋亡基因bcl-2高表达,而分化型腺癌和晚期胃癌低表达;TUNEL显示未分化型腺癌和早期胃癌凋亡细胞指数明显高地分化型腺癌和晚期胃癌,差异有显著性(P<0.01)。p53基因与抗凋亡基因bcl-2呈负相关,与细胞凋亡指数呈正相关。结论:胃癌p53基因和细胞凋亡共同参与调节细胞的生存与死亡;二者均与胃癌的分期有关。  相似文献   

4.
目的:为探讨非小细胞肺癌中p53蛋白表达与肺癌组织学类型、分化程度和淋巴结转移的关系。方法:应用免疫级化技术(ABC法),以p53单克隆抗体检测53例非小细胞肺癌组织中p53基因的表达,组织经微波抗原修复后进行免疫染色。结果采用X2检验。结果:p53蛋白在53例非小细胞肺癌中表达阳性率为64.2%,p53蛋白表达与非小细胞肺癌的组织学类型无关(P>0.05);与肺鳞癌分化程度有关(P<0.01);肺腺癌中与淋巴结转移有关(p<0.05)。结论:p53基因的表达异常与不同类型的肺癌发生发展相关,提示P53基因在肺癌的形成、分化和转移过程中起不同的调节作用,p53蛋白过度表达则预后差,检测p53蛋白对判断非小细胞肺癌预后具有应用价值。  相似文献   

5.
本文应用PCNA和p53抑癌基因蛋白的免疫络化方法,对11例胆囊上皮良性病变和33例胆囊癌进行了研究,结果发现胆囊良性病变和胆囊癌的平均PCNA指数分别为:良性病变为24.1%(n=11.x±24.6),高分化癌为48.0%(n=13,x±12.8),中分化癌为49.5%(n=11,x±15.4).低分化癌为76.4%(n=9,x±18.1);高分化胆囊癌平均PCNA指数明显高于良性病变(P<0.05);低分化癌的平均PCNA指数明显高于高分化癌(P<0.05);11例胆囊上皮良性病变均无p53蛋白阳性表达;33例胆囊癌p53阳性表达12例(36.4%),高分化癌p53阳性率为15.4%(2/13).中分化癌45.5%(5/11).低分化癌55.6%(5/9):各组阳性率比较无显著性差异(P>0.05);PCNA指数≥50%的胆囊癌其p53蛋白阳性率明显高于PCNA指数<50%的胆囊癌(P<0.05)。结果提示:PCNA指数与胆囊癌的分化程度有关.PCNA及p53蛋白的免疫组化染色对胆囊上皮良、恶性病变的鉴别论断有帮助。本文还就胆囊癌p53蛋白表达与PCNA指数的关系进行了讨论。  相似文献   

6.
目的:研究p53、PCNA(增殖细胞核抗原)在大肠肿瘤组织中表达及其临床价值。方法:应用免疫组化技术(S-P法)检测17例大肠腺瘤,7例腺瘤癌变,48例大肠癌组织表达。结果:大肠腺瘤p53阳性率为29.4%,腺瘤癌变为71.4%,大肠癌p53阳性率为56.3%,PCNA强阳性(++)表达与p53阳性表达呈平行关系。结论:p53、PCNA过度表达代表腺癌细胞由良性向恶性转化区域,并与大肠癌的淋巴结转移和生存期相关。  相似文献   

7.
目的:探讨c-erbB-2、ras、p53基因的表达与大肠癌发生发展的关系以及其对大肠癌早期诊断、预后判断的价值。方法:对45例大肠癌及36例癌旁非腺瘤型不典型增生、17例大肠腺瘤,用免疫组化方法检测基因产物的表达。结果:p53在大肠癌的阳性表达率为57.8%,p53蛋白高表达的癌旁非腺瘤型不典型增生及大肠腺瘤均为中度或高度不典型增生。p53蛋白表达与大肠癌的组织分化程度、淋巴结转移有关(P<0.05)。p21、p185蛋白表达与大肠癌组织学分型、癌组织浸润程度、淋巴结转移无关,而与癌组织分化程度有关(P<0.05)。结论:p53蛋白表达可能是大肠病变恶性倾向的一个独立标志。p53、p21、p185蛋白对大肠癌的发生、发展起重要作用。  相似文献   

8.
老年宫颈癌p53和c-erbB2表达及其临床意义   总被引:4,自引:0,他引:4  
Huang YW  Li MD  Wu QL  Liu FY 《癌症》2002,21(3):297-300
背景与目的:老年宫颈癌分子生物学方面的研究尚不多见,因此我们将探讨抑癌基因p53和癌基因c-erbB2表达在其发生发展过程中的意义。方法:应用免疫组化LSAB法检测79例老年宫颈癌及23例正常老年宫颈上皮石蜡切片的p53和c-erbB2蛋白阳性率。结果:老年宫颈浸润癌和正常宫颈上皮p53蛋白阳性率分别为18.98%和0(P<0.01),而c-erbB2表达率为43.04%和34.78%(P=0.63)。组织学分级I、Ⅱ、Ⅲ级中p53蛋白阳性率分别为50.00%、11.76%和17.14%(P=0.01),c-erbB2表达率分别为80.00%、38.24%及37.14%(P<0.01)。临床分期I、Ⅱ、Ⅲ/Ⅳ期中p53表达分别为11.11%、15.38%、25.18%(P=0.26),c-erbB2蛋白阳性率为33.33%、38.46%和51.61%(P<0.01)。淋巴结无转移组及转移组p53蛋白阳性率为6.67%、41.67%(P=0.01),c-erbB2表达率为26.67%、58.33%(P=0.08)。结论:p53蛋白在老年宫颈癌发生发展中可能起作用,它可能是预测淋巴结转移的重要指标。c-erbB2基因过度表达可能是老年宫颈癌发生的早期事件。  相似文献   

9.
(目的〕研究肺癌中MTS1/p16和p53基因产物的表达与细胞增殖的关系。〔方法〕应用SP免疫组织化学方法研究62例肺癌组织中p16蛋白和p53蛋白的表达情况,并进行增殖细胞核抗原检测,计算细胞增殖指数(PI)。(结果)62例肺癌组织中p16蛋白和p53蛋白阳性率分别为58.1%和59、7%。晚癌p16蛋白的阳性率明显高于小细胞癌(p<0.05);淋巴结转移阳性组p16蛋白的表达显著低于阴性组(P<0.05);PI分级为巨级的p16蛋白表达显著高于Ⅳ级(p<0.05)。不同组织类型肺癌中p53蛋白的表达未见明显差异,淋巴结转移阳性组p53蛋白的表达高于阴性组(p<0.01〕;不同PI分级中p53蛋白的表达,N级明显高于1级和Ⅱ级(P<0.05),三级明显高于1级(p<0.05)和Ⅱ级(P<0.01)。p16蛋白低表达和p53蛋白过度表达之间未见明显相关性。(结论〕提示p16蛋白低表达和p53蛋白过度表达均有促进肺癌细胞增殖的作用,p16蛋白的表达与肺癌的细胞分化有关,p53蛋白过度表达对肺癌细胞的转移起重要作用。抑癌基因p53对MTS1/p16基因无明显调控作用。检测p53蛋白表达可作为肺癌诊断的一项新指标。  相似文献   

10.
p16蛋白在大肠癌中的表达及其临床意义   总被引:4,自引:0,他引:4  
应用免疫组化LSAB法检测了105例大肠癌组织中p16蛋白。结果:大肠癌p16蛋白表达阳性率为60.0%,与癌组织分化程度呈正相关(P<0.01),与癌组织浸润深度和Dukes′分期呈负相关(P<0.01)。无区域淋巴结转移者的p16蛋白表达阳性率为76.9%,伴区域淋巴结或远处器官转移者为50.0%,二者有显著性差异(P<0.01)。生存超过5年者p16蛋白表达阳性率(83.3%)明显高于5年内死亡者(53.1%),有显著性差异(P<0.05)。说明p16基因能抑制大肠癌的浸润与转移,p16蛋白表达水平可作为判断大肠癌患者预后的生物学指标  相似文献   

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12.
Bacteria and cancer--antagonisms and benefits   总被引:1,自引:0,他引:1  
H C Nauts 《Cancer surveys》1989,8(4):713-723
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.  相似文献   

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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.  相似文献   

16.
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.  相似文献   

17.
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。  相似文献   

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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.  相似文献   

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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。  相似文献   

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