目的:探讨Pim-3的异常表达在胃癌发展过程中的作用.方法:使用半定量RT-PCR法和免疫组化法检测40例胃癌组织及20例癌旁正常组织标本Pim-3的表达,并比较Pim-3的表达与胃癌临床病理参数的关系.结果:与正常胃黏膜相比,Pim-3mRNA的表达量在...目的:探讨Pim-3的异常表达在胃癌发展过程中的作用.方法:使用半定量RT-PCR法和免疫组化法检测40例胃癌组织及20例癌旁正常组织标本Pim-3的表达,并比较Pim-3的表达与胃癌临床病理参数的关系.结果:与正常胃黏膜相比,Pim-3mRNA的表达量在胃癌组织中更高(0.287±0.058 vs 0.053±0.055,P<0.001).中分化腺癌中Pim-3蛋白的表达高于低分化腺癌组织中的表达,两者比较差异显著(50%vs20%,P<0.05).Pim-3的表达与淋巴转移、静脉转移密切相关(r=0.385,0.412,P=0.014,0.008).结论:Pim-3可作为胃癌早期的生物标志物,并可预示肿瘤的预后.展开更多
对12月龄SD大鼠给予L-苹果酸30d后,采用含有SYBR Green I的Real Time RT-PCR法,对肝脏和心脏线粒体苹果酸天冬氨酸穿梭中的两种转运蛋白(天冬氨酸谷氨酸转运蛋白(AGC)与α-酮戊二酸苹果酸转运蛋白(OMC))以及两种抗氧化酶(过氧化氢酶(CAT...对12月龄SD大鼠给予L-苹果酸30d后,采用含有SYBR Green I的Real Time RT-PCR法,对肝脏和心脏线粒体苹果酸天冬氨酸穿梭中的两种转运蛋白(天冬氨酸谷氨酸转运蛋白(AGC)与α-酮戊二酸苹果酸转运蛋白(OMC))以及两种抗氧化酶(过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-Px))的基因表达进行检测,以研究L-苹果酸增强线粒体抗氧化作用的分子生物学机制。结果表明:苹果酸组中大鼠心肌细胞AGC、OMC、CAT、GSH-Px的mRNA表达量分别是空白对照组的1.25、1.39、1.12、1.01倍。苹果酸组中大鼠肝脏细胞AGC、OMC、CAT、GSH-Px的mRNA表达量分别是空白对照组的1.33、1.02、1.25、0.94倍。由此推测,L-苹果酸可能通过促进苹果酸天冬氨酸穿梭蛋白以及抗氧化酶的基因表达,实现提高线粒体的抗氧化作用。展开更多
AIM： To evaluate the relationship between vascular invasion and microvessel density （MVD） of tissue and micrometastasis in blood. METHODS： Vascular invasion was detected by both hematoxylin and eosin staining and ...AIM： To evaluate the relationship between vascular invasion and microvessel density （MVD） of tissue and micrometastasis in blood. METHODS： Vascular invasion was detected by both hematoxylin and eosin staining and immunohistochemiscal staining. Blood samples were collected from 17 patients with vascular invasion and 29 patients without vascular invasion and examined for cytokeratin20 （CK20） expression by reverse transcriptase-polymerase chain reaction （RT-PCR） analysis. Microvessel density of tissue samples was also determined by immunohistochemistry using antibodies to CD105. RESULTS： CK20 was detected in 12 of the 17 patients with vascular invasion and in 9 of the 29 patients without vascular invasion. Positive RT-PCR was significantly correlated with vascular invasion （70.6% vs 30.0%, P 〈 0.05）. The average MVD was significantly higher in patients with positive vascular invasion than in patients with negative vascular invasion （29.2 ± 3.3 vs 25.4 ± 4.7, P 〈 0.05）. The vascular invasion detected with hematoxylin-eosin staining was less than that with immunohistochemical staining. There was a significant difference between the two staining methods （19.6% vs 36.9%, P 〈 0.05）. CONCLUSION： Positive CK20 RT-PCR, depth of tumor invasion, lymph node status, metastasis and MVD are significantly correlated with vascular invasion. Immunohistochemical staining is more sensitive than hematoxylin-eosin staining for detecting vascular invasion.展开更多
文摘目的:探讨Pim-3的异常表达在胃癌发展过程中的作用.方法:使用半定量RT-PCR法和免疫组化法检测40例胃癌组织及20例癌旁正常组织标本Pim-3的表达,并比较Pim-3的表达与胃癌临床病理参数的关系.结果:与正常胃黏膜相比,Pim-3mRNA的表达量在胃癌组织中更高(0.287±0.058 vs 0.053±0.055,P<0.001).中分化腺癌中Pim-3蛋白的表达高于低分化腺癌组织中的表达,两者比较差异显著(50%vs20%,P<0.05).Pim-3的表达与淋巴转移、静脉转移密切相关(r=0.385,0.412,P=0.014,0.008).结论:Pim-3可作为胃癌早期的生物标志物,并可预示肿瘤的预后.
文摘对12月龄SD大鼠给予L-苹果酸30d后,采用含有SYBR Green I的Real Time RT-PCR法,对肝脏和心脏线粒体苹果酸天冬氨酸穿梭中的两种转运蛋白(天冬氨酸谷氨酸转运蛋白(AGC)与α-酮戊二酸苹果酸转运蛋白(OMC))以及两种抗氧化酶(过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-Px))的基因表达进行检测,以研究L-苹果酸增强线粒体抗氧化作用的分子生物学机制。结果表明:苹果酸组中大鼠心肌细胞AGC、OMC、CAT、GSH-Px的mRNA表达量分别是空白对照组的1.25、1.39、1.12、1.01倍。苹果酸组中大鼠肝脏细胞AGC、OMC、CAT、GSH-Px的mRNA表达量分别是空白对照组的1.33、1.02、1.25、0.94倍。由此推测,L-苹果酸可能通过促进苹果酸天冬氨酸穿梭蛋白以及抗氧化酶的基因表达,实现提高线粒体的抗氧化作用。
文摘AIM： To evaluate the relationship between vascular invasion and microvessel density （MVD） of tissue and micrometastasis in blood. METHODS： Vascular invasion was detected by both hematoxylin and eosin staining and immunohistochemiscal staining. Blood samples were collected from 17 patients with vascular invasion and 29 patients without vascular invasion and examined for cytokeratin20 （CK20） expression by reverse transcriptase-polymerase chain reaction （RT-PCR） analysis. Microvessel density of tissue samples was also determined by immunohistochemistry using antibodies to CD105. RESULTS： CK20 was detected in 12 of the 17 patients with vascular invasion and in 9 of the 29 patients without vascular invasion. Positive RT-PCR was significantly correlated with vascular invasion （70.6% vs 30.0%, P 〈 0.05）. The average MVD was significantly higher in patients with positive vascular invasion than in patients with negative vascular invasion （29.2 ± 3.3 vs 25.4 ± 4.7, P 〈 0.05）. The vascular invasion detected with hematoxylin-eosin staining was less than that with immunohistochemical staining. There was a significant difference between the two staining methods （19.6% vs 36.9%, P 〈 0.05）. CONCLUSION： Positive CK20 RT-PCR, depth of tumor invasion, lymph node status, metastasis and MVD are significantly correlated with vascular invasion. Immunohistochemical staining is more sensitive than hematoxylin-eosin staining for detecting vascular invasion.
