目的:探讨NSCLC患者癌组织中Ki-67与PD-L1表达的相关性及两者对患者预后的影响。方法:选取符合纳入标准的2012年1月至2018年8月在海军军医大学附属长海医院,手术确诊为NSCLC并进行免疫组化PD-L1和Ki-67检测的患者401例,收集其临床病理资...目的:探讨NSCLC患者癌组织中Ki-67与PD-L1表达的相关性及两者对患者预后的影响。方法:选取符合纳入标准的2012年1月至2018年8月在海军军医大学附属长海医院,手术确诊为NSCLC并进行免疫组化PD-L1和Ki-67检测的患者401例,收集其临床病理资料,定期生存随访,应用统计学方法分析Ki-67与PD-L1表达的相关性及两者对患者术后DFS和化疗后PFS的影响。结果:NSCLC组织中PD-L1和Ki-67表达阳性率分别为37.9%(152/401)和96.3%(386/401),单因素分析显示Ki-67为PDL1表达相关的影响因素(OR=0.33,95%CI=0.28～0.39,P<0.0001),曲线拟合分析显示Ki-67与PD-L1表达显著正相关,阈值效应分析、分段多因素Logistic和ROC曲线分析表明14%是Ki-67较适宜与PD-L1联用的阈值。Kaplan-Meier分析显示,术后DFS,Ki-67高表达组显著短于Ki-67低表达组[(21.88±11.25) vs (41.22±16.25)个月,P<0.0001],PD-L1阳性组显著短于PD-L1阴性组[(24.75±14.59) vs (38.27±16.75)个月,P<0.0001],Ki-67高表达/PD-L1阳性组与其余3组相比术后DFS最短[(20.57±11.33) vs(24.11±10.79) vs (36.00±16.79) vs (42.91±15.77)个月,P<0.0001];化疗PFS,Ki-67高表达组显著长于Ki-67低表达组[(7.70±3.01) vs(5.80±2.99)个月,P=0.016],PD-L1阳性组与阴性组相比差异无统计学意义[(7.04±3.21) vs (6.33±3.06)个月,P=0.22],Ki-67与PDL1联合测评,Ki-67高表达两组的PFS显著长于Ki-67低表达两组[(7.74±3.25) vs (7.43±2.38) vs(4.91±1.97) vs (6.02±3.19)个月,P=0.041]。结论:NSCLC组织中Ki-67与PD-L1表达呈正相关,Ki-67 14%是适宜与PD-L1联用的阈值,Ki-67和PD-L1均为患者预后不良的预测因子,两者联合对预后不良的预测有"叠加效应",同时Ki-67高表达患者对化疗的敏感性较好。展开更多
The vaned-diffuser usually brings compressor instability problems under the small flow rate, for instance the spike-type rotating stall phenomenon which restricts the operation range and may cause the trouble of blade...The vaned-diffuser usually brings compressor instability problems under the small flow rate, for instance the spike-type rotating stall phenomenon which restricts the operation range and may cause the trouble of blade fatigue. Since it is difficult to mathematically predict the spike-type stall for its randomness, finding out a practical method to warning this stall precursor appears to be meaningful. The paper explains the relationship between the spike-type precursor and the blade passing irregularity coefficient to analyze whether this coefficient is appropriate for the spike-stall warning inside a centrifugal compressor with the vaned-diffuser. The advanced wireless measurements were conducted on a 1.5 stages test centrifugal compressor to capture the unsteady behavior progressing from the design to stall inception within the region between the impeller trailing edge(TE) and diffuser leading edge(LE). The circumferential distribution of the blade passing irregularity has been quantitatively revealed.The steep increase of the blade passing irregularity at some "special locations", which is responsible for the onset of the spiketype precursor, is highlighted. Also, to further understand the spike precursor inside the diffuser passage corresponding to the circumferential "special location" with maximum irregularity, the high-response transient measurement within this passage is presented. With the help of full-annulus computational fluid dynamics(CFD) simulation and the mathematical model, it is proved that the blade passing irregularity precisely reflects the flow characteristics during the spike precursor, which presents the guidance for this stall warning method.展开更多
文摘目的:探讨NSCLC患者癌组织中Ki-67与PD-L1表达的相关性及两者对患者预后的影响。方法:选取符合纳入标准的2012年1月至2018年8月在海军军医大学附属长海医院,手术确诊为NSCLC并进行免疫组化PD-L1和Ki-67检测的患者401例,收集其临床病理资料,定期生存随访,应用统计学方法分析Ki-67与PD-L1表达的相关性及两者对患者术后DFS和化疗后PFS的影响。结果:NSCLC组织中PD-L1和Ki-67表达阳性率分别为37.9%(152/401)和96.3%(386/401),单因素分析显示Ki-67为PDL1表达相关的影响因素(OR=0.33,95%CI=0.28～0.39,P<0.0001),曲线拟合分析显示Ki-67与PD-L1表达显著正相关,阈值效应分析、分段多因素Logistic和ROC曲线分析表明14%是Ki-67较适宜与PD-L1联用的阈值。Kaplan-Meier分析显示,术后DFS,Ki-67高表达组显著短于Ki-67低表达组[(21.88±11.25) vs (41.22±16.25)个月,P<0.0001],PD-L1阳性组显著短于PD-L1阴性组[(24.75±14.59) vs (38.27±16.75)个月,P<0.0001],Ki-67高表达/PD-L1阳性组与其余3组相比术后DFS最短[(20.57±11.33) vs(24.11±10.79) vs (36.00±16.79) vs (42.91±15.77)个月,P<0.0001];化疗PFS,Ki-67高表达组显著长于Ki-67低表达组[(7.70±3.01) vs(5.80±2.99)个月,P=0.016],PD-L1阳性组与阴性组相比差异无统计学意义[(7.04±3.21) vs (6.33±3.06)个月,P=0.22],Ki-67与PDL1联合测评,Ki-67高表达两组的PFS显著长于Ki-67低表达两组[(7.74±3.25) vs (7.43±2.38) vs(4.91±1.97) vs (6.02±3.19)个月,P=0.041]。结论:NSCLC组织中Ki-67与PD-L1表达呈正相关,Ki-67 14%是适宜与PD-L1联用的阈值,Ki-67和PD-L1均为患者预后不良的预测因子,两者联合对预后不良的预测有"叠加效应",同时Ki-67高表达患者对化疗的敏感性较好。
基金supported by the National Natural Science Foundation of China(Grant Nos.51770512 and 51576153)
文摘The vaned-diffuser usually brings compressor instability problems under the small flow rate, for instance the spike-type rotating stall phenomenon which restricts the operation range and may cause the trouble of blade fatigue. Since it is difficult to mathematically predict the spike-type stall for its randomness, finding out a practical method to warning this stall precursor appears to be meaningful. The paper explains the relationship between the spike-type precursor and the blade passing irregularity coefficient to analyze whether this coefficient is appropriate for the spike-stall warning inside a centrifugal compressor with the vaned-diffuser. The advanced wireless measurements were conducted on a 1.5 stages test centrifugal compressor to capture the unsteady behavior progressing from the design to stall inception within the region between the impeller trailing edge(TE) and diffuser leading edge(LE). The circumferential distribution of the blade passing irregularity has been quantitatively revealed.The steep increase of the blade passing irregularity at some "special locations", which is responsible for the onset of the spiketype precursor, is highlighted. Also, to further understand the spike precursor inside the diffuser passage corresponding to the circumferential "special location" with maximum irregularity, the high-response transient measurement within this passage is presented. With the help of full-annulus computational fluid dynamics(CFD) simulation and the mathematical model, it is proved that the blade passing irregularity precisely reflects the flow characteristics during the spike precursor, which presents the guidance for this stall warning method.
