Pretreatment of the corn stover powder by dilute sulphuric acid (solid-liquid ratio 1 : 20) at 130 for 30 min was carried out with 89.09% of the hemicellulose removed. After filtration, the xylose-rich corn stover ...Pretreatment of the corn stover powder by dilute sulphuric acid (solid-liquid ratio 1 : 20) at 130 for 30 min was carried out with 89.09% of the hemicellulose removed. After filtration, the xylose-rich corn stover pretreatment liquid, whose fermentable sugar was from hemicellulose hydrolysis only, consisting of 81.16% xylose and 15.27% glucose, was used to cultivate genetic recombinant Escherichia coli BL21 with human-like collagen (HLC) expression enhanced by 50.00% and 63.71% xylose consumption.展开更多
目的 :分析血清骨代谢标志物Ⅰ型胶原羧基端肽β特殊序列(βisomer of the C-terminal telopeptide of typeⅠcollagen,β-CTX)和骨钙素N-端中分子片段(N-terminal midfragment of osteocalcin,N-MID)在老年肺癌骨转移患者接受唑来膦酸...目的 :分析血清骨代谢标志物Ⅰ型胶原羧基端肽β特殊序列(βisomer of the C-terminal telopeptide of typeⅠcollagen,β-CTX)和骨钙素N-端中分子片段(N-terminal midfragment of osteocalcin,N-MID)在老年肺癌骨转移患者接受唑来膦酸治疗过程中的变化情况,探讨二者对老年肺癌骨转移患者临床预后的预测价值。方法:在本项前瞻性研究中,选取年龄>60岁的肺癌骨转移患者126例,肺癌无骨转移患者110例,同时入组的正常对照为89例。所有肺癌骨转移患者均应用唑来膦酸治疗,每4周1次(4 mg静脉滴注)。采用放射免疫法动态监测肺癌骨转移患者在治疗前和唑来膦酸治疗后2、4、6、8、10和12个月的血清β-CTX和N-MID水平,并记录研究期间患者发生骨相关事件(skeletal-related events,SREs)和总生存的情况。结果:肺癌骨转移组血清β-CTX和N-MID基线水平明显高于肺癌无骨转移组及正常对照组(P值均<0.001),而唑来膦酸治疗后肺癌骨转移组的β-CTX和N-MID水平较治疗前基线水平明显下降(P值均<0.01)。多因素分析结果显示,β-CTX和N-MID是影响SREs发生的独立危险因素[比值比(odds ratio,OR)=6.367,P=0.001;OR=3.015,P=0.025)。高水平β-CTX组发生SREs的中位时间和中位生存时间均短于低水平β-CTX组,差异均有统计学意义(6.0个月vs 10.5个月,P=0.031;13.0个月vs 16.5个月,P=0.028);高水平N-MID组发生SREs的中位时间也低于低水平N-MID组(6.5个月vs 10.5个月,P=0.046),但是二者的中位生存时间无明显差异(14.5个月vs 17.0个月,P=0.226)。结论:血清β-CTX和N-MID是预测老年肺癌骨转移患者发生SREs的有效指标,同时β-CTX可能对评估老年肺癌骨转移患者的预后有一定价值。展开更多
基金Supported by the Agriculture Application Investigation and Improvement Item of New Countryside Construction and Promotion Project of the Bureau of Science and Technology in Xi’an (NC08005)
文摘Pretreatment of the corn stover powder by dilute sulphuric acid (solid-liquid ratio 1 : 20) at 130 for 30 min was carried out with 89.09% of the hemicellulose removed. After filtration, the xylose-rich corn stover pretreatment liquid, whose fermentable sugar was from hemicellulose hydrolysis only, consisting of 81.16% xylose and 15.27% glucose, was used to cultivate genetic recombinant Escherichia coli BL21 with human-like collagen (HLC) expression enhanced by 50.00% and 63.71% xylose consumption.
文摘目的 :分析血清骨代谢标志物Ⅰ型胶原羧基端肽β特殊序列(βisomer of the C-terminal telopeptide of typeⅠcollagen,β-CTX)和骨钙素N-端中分子片段(N-terminal midfragment of osteocalcin,N-MID)在老年肺癌骨转移患者接受唑来膦酸治疗过程中的变化情况,探讨二者对老年肺癌骨转移患者临床预后的预测价值。方法:在本项前瞻性研究中,选取年龄>60岁的肺癌骨转移患者126例,肺癌无骨转移患者110例,同时入组的正常对照为89例。所有肺癌骨转移患者均应用唑来膦酸治疗,每4周1次(4 mg静脉滴注)。采用放射免疫法动态监测肺癌骨转移患者在治疗前和唑来膦酸治疗后2、4、6、8、10和12个月的血清β-CTX和N-MID水平,并记录研究期间患者发生骨相关事件(skeletal-related events,SREs)和总生存的情况。结果:肺癌骨转移组血清β-CTX和N-MID基线水平明显高于肺癌无骨转移组及正常对照组(P值均<0.001),而唑来膦酸治疗后肺癌骨转移组的β-CTX和N-MID水平较治疗前基线水平明显下降(P值均<0.01)。多因素分析结果显示,β-CTX和N-MID是影响SREs发生的独立危险因素[比值比(odds ratio,OR)=6.367,P=0.001;OR=3.015,P=0.025)。高水平β-CTX组发生SREs的中位时间和中位生存时间均短于低水平β-CTX组,差异均有统计学意义(6.0个月vs 10.5个月,P=0.031;13.0个月vs 16.5个月,P=0.028);高水平N-MID组发生SREs的中位时间也低于低水平N-MID组(6.5个月vs 10.5个月,P=0.046),但是二者的中位生存时间无明显差异(14.5个月vs 17.0个月,P=0.226)。结论:血清β-CTX和N-MID是预测老年肺癌骨转移患者发生SREs的有效指标,同时β-CTX可能对评估老年肺癌骨转移患者的预后有一定价值。