目的探讨黑色素瘤优先表达抗原(preferentially expressed antigen of melanoma,PRAME)和程序性死亡配体-1(programmed death ligand-1,PD-L1)在三阴型乳腺癌(triple-negative breast cancer,TNBC)中的表达及临床意义。方法收集260例乳...目的探讨黑色素瘤优先表达抗原(preferentially expressed antigen of melanoma,PRAME)和程序性死亡配体-1(programmed death ligand-1,PD-L1)在三阴型乳腺癌(triple-negative breast cancer,TNBC)中的表达及临床意义。方法收集260例乳腺癌切除标本(TNBC 46例、非TNBC 214例)及正常乳腺组织50例,应用免疫组化EnVision法检测PRAME和PD-L1的表达,分析两者与TNBC临床病理特征的关系,并复习相关文献。结果PRAME在TNBC及非TNBC中的阳性率分别为38.8%和41.3%,差异无显著性(P>0.05),在乳腺癌及正常乳腺组织中的阳性率分别为39.2%和0,差异有显著性(P<0.01),PRAME在乳腺癌中的表达与肿瘤大小、淋巴结转移无相关性。PD-L1在TNBC及非TNBC中的阳性率分别为37.0%和25.0%,差异有显著性(P<0.05),在乳腺癌及正常乳腺组织中的阳性率分别为27.3%和0,差异有显著性(P<0.01),PD-L1在乳腺癌中的表达与淋巴结转移呈正相关,与肿瘤大小无相关性。结论PRAME和PD-L1在乳腺癌组织中的阳性率较高,TNBC中PD-L1阳性率高,其表达与淋巴结转移呈正相关,提示患者预后不良。PRAME和PD-L1可作为TNBC免疫治疗靶点,为临床治疗TNBC提供依据。展开更多
Four ＂picket fence＂ porphyrin atropisomers were respectively synthesized from the four corresponding atropisomers of meso-tetra（o-aminophenyl）porphyrin that had been chromatographed on a column eluted with petrole...Four ＂picket fence＂ porphyrin atropisomers were respectively synthesized from the four corresponding atropisomers of meso-tetra（o-aminophenyl）porphyrin that had been chromatographed on a column eluted with petroleum ether and ethyl acetate. Results show that each atropisomer could be successfully synthesized by controlling the acylation temperature at 0 ℃. They were characterized by 1H NMR, HRMS, IR, UV-Vis and Langmuir-Blodgett（LB） film analyses. Although the results of HRMS, IR, UV-Vis analyses indicate there is no remarkable difference among the atropisomers, the results of the 1H NMR and the mean molecular areas obtained by LB film technique imply that the atropisomers are significantly discrepant. The former shows that the chemical shifts of the methyl and amide protons of each atropisomer are distinct, while the later presents that the different atropisomer molecules can occupy the different surface areas at the air/water interface.展开更多
文摘目的探讨黑色素瘤优先表达抗原(preferentially expressed antigen of melanoma,PRAME)和程序性死亡配体-1(programmed death ligand-1,PD-L1)在三阴型乳腺癌(triple-negative breast cancer,TNBC)中的表达及临床意义。方法收集260例乳腺癌切除标本(TNBC 46例、非TNBC 214例)及正常乳腺组织50例,应用免疫组化EnVision法检测PRAME和PD-L1的表达,分析两者与TNBC临床病理特征的关系,并复习相关文献。结果PRAME在TNBC及非TNBC中的阳性率分别为38.8%和41.3%,差异无显著性(P>0.05),在乳腺癌及正常乳腺组织中的阳性率分别为39.2%和0,差异有显著性(P<0.01),PRAME在乳腺癌中的表达与肿瘤大小、淋巴结转移无相关性。PD-L1在TNBC及非TNBC中的阳性率分别为37.0%和25.0%,差异有显著性(P<0.05),在乳腺癌及正常乳腺组织中的阳性率分别为27.3%和0,差异有显著性(P<0.01),PD-L1在乳腺癌中的表达与淋巴结转移呈正相关,与肿瘤大小无相关性。结论PRAME和PD-L1在乳腺癌组织中的阳性率较高,TNBC中PD-L1阳性率高,其表达与淋巴结转移呈正相关,提示患者预后不良。PRAME和PD-L1可作为TNBC免疫治疗靶点,为临床治疗TNBC提供依据。
基金Supported by the National Natural Science Foundation of China(No.20806025)
文摘Four ＂picket fence＂ porphyrin atropisomers were respectively synthesized from the four corresponding atropisomers of meso-tetra（o-aminophenyl）porphyrin that had been chromatographed on a column eluted with petroleum ether and ethyl acetate. Results show that each atropisomer could be successfully synthesized by controlling the acylation temperature at 0 ℃. They were characterized by 1H NMR, HRMS, IR, UV-Vis and Langmuir-Blodgett（LB） film analyses. Although the results of HRMS, IR, UV-Vis analyses indicate there is no remarkable difference among the atropisomers, the results of the 1H NMR and the mean molecular areas obtained by LB film technique imply that the atropisomers are significantly discrepant. The former shows that the chemical shifts of the methyl and amide protons of each atropisomer are distinct, while the later presents that the different atropisomer molecules can occupy the different surface areas at the air/water interface.
基金The project supported partially by the State Key Basic Research Program of China under Grant No. 2004 CB 318000The authors would like to thank the referee for his/her valuable suggestions.
