目的探讨自主运动训练在乳腺癌发生发展中的作用及其机制。方法将携带原发性人乳腺癌基因1(breast cancer gene 1,BRCA-1)突变基因的癌细胞在体外进行培养,用连续14 d自主跑轮运动鼠血清以及静坐鼠血清处理BRCA-1突变肿瘤细胞,并将上述...目的探讨自主运动训练在乳腺癌发生发展中的作用及其机制。方法将携带原发性人乳腺癌基因1(breast cancer gene 1,BRCA-1)突变基因的癌细胞在体外进行培养,用连续14 d自主跑轮运动鼠血清以及静坐鼠血清处理BRCA-1突变肿瘤细胞,并将上述条件血清培养的乳腺癌细胞注射到BALB/c裸鼠皮下,观察经过不同处理后体内外BRCA-1突变乳腺癌细胞及移植瘤的情况。结果在体外,与静坐鼠血清处理组相比,自主运动鼠血清处理后抑制了BRCA-1突变乳腺癌细胞的活力、生长,促进其凋亡,差异具有统计学意义(P<0.05);在体内,自主运动鼠血清培养的BRCA-1突变乳腺癌细胞移植瘤较静坐对照组体积减小、生长缓慢(P<0.05),体内外自主运动组均呈现出增强的Caspase-3活性(P<0.05)。结论自主跑轮运动可能通过增强Caspase3的活性、抑制了BRCA1突变乳腺癌细胞以及其在BALB/c裸鼠皮下异种移植瘤的增殖、促进肿瘤细胞凋亡,从而抑制其体内外的生长。展开更多
目的:研究乳腺癌患者乳腺癌手术标本中乳腺癌易感基因1(breast cancer susceptibility gene1,BRCA-1)蛋白表达、原癌基因HER-2的基因扩增与蛋白表达及其与临床病理特征之间的关系。方法:采用免疫组织化学和显色原位杂交的方法,检测乳腺...目的:研究乳腺癌患者乳腺癌手术标本中乳腺癌易感基因1(breast cancer susceptibility gene1,BRCA-1)蛋白表达、原癌基因HER-2的基因扩增与蛋白表达及其与临床病理特征之间的关系。方法:采用免疫组织化学和显色原位杂交的方法,检测乳腺癌手术切除肿瘤组织中的HER-2和BRCA-1蛋白表达以及HER-2基因扩增情况,对这两个基因的表达与临床相关病理特征之间的关系进行分析。结果:BRCA-1和HER-2蛋白表达在不同组织类型中差异无统计学意义,但在不同肿瘤大小、不同组织分级和有无淋巴结转移中差异有显著性(P<0.05)。BRCA-1蛋白表达与HER-2基因扩增率呈负相关。结论:BRCA-1和HER-2蛋白表达对乳腺癌的发生发展具有一定作用,检测BRCA-1和HER-2蛋白表达在乳腺癌的早期诊断、判断生物学行为、预测预后中有重要意义。另外BRCA-1与HER-2可能存在相关性,须进一步研究。展开更多
We report an improved strategy for conjugated polymer-based optical DNA detection with stem-loop structured DNA probes.The high sensitivity of conjugated polymer-based biosensors arises from light harvesting by the co...We report an improved strategy for conjugated polymer-based optical DNA detection with stem-loop structured DNA probes.The high sensitivity of conjugated polymer-based biosensors arises from light harvesting by the conjugated polymer and the related amplified fluorescent signal transduction either through quenching or through Fǒrster energy transfer) In our previous publication,we demonstrated that the coupling of magnetic particles to conjugated polymers significantly improves the selectivity of this class of DNA sensors.Here we further improved the selectivity by introducing both stem-loop structured capture probe and competition probe.We demonstrated further that this improved magnetically assisted DNA sensor can conveniently identify even a single-nucleotide mismatch in the target sequence.展开更多
文摘目的探讨自主运动训练在乳腺癌发生发展中的作用及其机制。方法将携带原发性人乳腺癌基因1(breast cancer gene 1,BRCA-1)突变基因的癌细胞在体外进行培养,用连续14 d自主跑轮运动鼠血清以及静坐鼠血清处理BRCA-1突变肿瘤细胞,并将上述条件血清培养的乳腺癌细胞注射到BALB/c裸鼠皮下,观察经过不同处理后体内外BRCA-1突变乳腺癌细胞及移植瘤的情况。结果在体外,与静坐鼠血清处理组相比,自主运动鼠血清处理后抑制了BRCA-1突变乳腺癌细胞的活力、生长,促进其凋亡,差异具有统计学意义(P<0.05);在体内,自主运动鼠血清培养的BRCA-1突变乳腺癌细胞移植瘤较静坐对照组体积减小、生长缓慢(P<0.05),体内外自主运动组均呈现出增强的Caspase-3活性(P<0.05)。结论自主跑轮运动可能通过增强Caspase3的活性、抑制了BRCA1突变乳腺癌细胞以及其在BALB/c裸鼠皮下异种移植瘤的增殖、促进肿瘤细胞凋亡,从而抑制其体内外的生长。
文摘目的:研究乳腺癌患者乳腺癌手术标本中乳腺癌易感基因1(breast cancer susceptibility gene1,BRCA-1)蛋白表达、原癌基因HER-2的基因扩增与蛋白表达及其与临床病理特征之间的关系。方法:采用免疫组织化学和显色原位杂交的方法,检测乳腺癌手术切除肿瘤组织中的HER-2和BRCA-1蛋白表达以及HER-2基因扩增情况,对这两个基因的表达与临床相关病理特征之间的关系进行分析。结果:BRCA-1和HER-2蛋白表达在不同组织类型中差异无统计学意义,但在不同肿瘤大小、不同组织分级和有无淋巴结转移中差异有显著性(P<0.05)。BRCA-1蛋白表达与HER-2基因扩增率呈负相关。结论:BRCA-1和HER-2蛋白表达对乳腺癌的发生发展具有一定作用,检测BRCA-1和HER-2蛋白表达在乳腺癌的早期诊断、判断生物学行为、预测预后中有重要意义。另外BRCA-1与HER-2可能存在相关性,须进一步研究。
基金We greatly appreciate the support from National Natural Science Foundation （20404016, 60537030）；Shanghai Municipal Commission for Science and Technology （0452nm068, 03DZ14025）；the program for Shanghai Rising Star and Chinese Academy of Sciences.
文摘We report an improved strategy for conjugated polymer-based optical DNA detection with stem-loop structured DNA probes.The high sensitivity of conjugated polymer-based biosensors arises from light harvesting by the conjugated polymer and the related amplified fluorescent signal transduction either through quenching or through Fǒrster energy transfer) In our previous publication,we demonstrated that the coupling of magnetic particles to conjugated polymers significantly improves the selectivity of this class of DNA sensors.Here we further improved the selectivity by introducing both stem-loop structured capture probe and competition probe.We demonstrated further that this improved magnetically assisted DNA sensor can conveniently identify even a single-nucleotide mismatch in the target sequence.
