目的:观察程序性细胞死亡因子1(programmed cell death 1,PD-1)免疫治疗联合贝伐单抗进行抗血管生成双靶治疗Ⅳ期肺腺癌的疗效,并分析其对细胞免疫功能、短期预后和不良反应的影响。方法:选取成都大学附属医院2018年12月至2020年8月收...目的:观察程序性细胞死亡因子1(programmed cell death 1,PD-1)免疫治疗联合贝伐单抗进行抗血管生成双靶治疗Ⅳ期肺腺癌的疗效,并分析其对细胞免疫功能、短期预后和不良反应的影响。方法:选取成都大学附属医院2018年12月至2020年8月收治的Ⅳ期肺腺癌患者67例,按照治疗方式不同分为对照组(n=33)和联合组(n=34),对照组予以化疗+PD-1抑制剂治疗,联合组予以化疗+PD-1抑制剂+贝伐单抗治疗,比较2组患者近期治疗疗效、治疗前后细胞免疫功能、卡氏功能状态(Karnofsky performance status,KPS)评分变化情况、不良反应及无进展生存期。结果:联合组患者治疗总有效率和疾病控制率分别为29.41%和79.41%,显著高于对照组的9.09%和54.55%(P<0.05);治疗后,联合组患者CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)显著高于对照组(P<0.05),CD8^(+)与对照组患者比较无统计学差异(P>0.05);联合组患者KPS评分增加稳定率为73.53%,显著高于对照组患者的45.45%(P<0.05);联合组患者骨髓抑制、消化道反应、血液毒性、肝肾功能损害及周围神经毒性不良反应发生率与对照组患者比较,差异无统计学意义(P>0.05);联合组患者中位无进展生存期为9.73个月,对照组患者中位无进展生存期为6.05个月,差异有统计学意义(P<0.05)。结论:PD-1免疫治疗联合贝伐单抗进行抗血管生成双靶治疗Ⅳ期肺腺癌,可明显提高近期治疗疗效,改善患者免疫功能,提高其生存质量,延长其无进展生存时间。展开更多
目的探讨Klotho逆转乳腺癌紫杉醇耐药的分子机制。方法 Western blot法检测乳腺癌细胞MCF-7与紫杉醇耐药的乳腺癌细胞MCF-7/PTX中Klotho的表达情况,MTT法检测Klotho对MCF-7/PTX细胞紫杉醇耐药的影响;Western blot法考查Klotho与自噬抑制...目的探讨Klotho逆转乳腺癌紫杉醇耐药的分子机制。方法 Western blot法检测乳腺癌细胞MCF-7与紫杉醇耐药的乳腺癌细胞MCF-7/PTX中Klotho的表达情况,MTT法检测Klotho对MCF-7/PTX细胞紫杉醇耐药的影响;Western blot法考查Klotho与自噬抑制剂3-methyladenine(3-MA)对MCF-7/PTX细胞Beclin1蛋白表达的影响,并利用MTT法检测Klotho与3-MA对该细胞紫杉醇耐药的影响。结果 MCF-7/PTX细胞中Klotho的表达较MCF-7细胞低,Klotho可增强MCF-7/PTX细胞对紫杉醇的敏感性;MCF-7/PTX细胞中Beclin1表达较MCF-7细胞高,而Klotho与3-MA均可降低该细胞中Beclin1的表达,且Klotho对该细胞紫杉醇耐药的逆转作用与3-MA相仿。结论乳腺癌细胞的紫杉醇耐药与Klotho表达有关,Klotho可通过抑制自噬进而逆转乳腺癌紫杉醇耐药。展开更多
This paper studies the southern part of Datong Basin and investigates, in combination with a survey on the soil properties, the salt content characteristics of the soil in the region using relevant analysis methods. T...This paper studies the southern part of Datong Basin and investigates, in combination with a survey on the soil properties, the salt content characteristics of the soil in the region using relevant analysis methods. The results showed that the soil salinization type of the soil in the study area is soda saline-alkaline soil, and the salt content of the profile soil tends to assemble in the soil surface. As the overall salt content is low, it is classified as moderately saline soil. However, being highly alkaline, it thus basically belongs to the moderate-to-severe level; a significant positive correlation is found between total salt quantity and exchange sodium and degree of alkalization. Exchange sodium is a factor that determines the size of alkalization degree and it also indirectly affects the p H value; special climate, topography and parent material, groundwater and soil properties, and tillage management of the region explain the formation of the large area of saline-alkali soil. This study will provide an important theoretical basis for the sustainable use of soil resources in the southern saline-alkali soil in Datong Basin.展开更多
Excess available K and Fe in Fe ore tailings with organic matter amendment and water-deficiencies may restrain plant colonization and growth,which hinders the formation of eco-engineered soil from these tailings for s...Excess available K and Fe in Fe ore tailings with organic matter amendment and water-deficiencies may restrain plant colonization and growth,which hinders the formation of eco-engineered soil from these tailings for sustainable and cost-effective mine site rehabilitation.Arbuscular mycorrhizal(AM)fungi are widely demonstrated to assist plant growth under various unfavorable environments.However,it is still unclear whether AM symbiosis in tailings amended with different types of plant biomass and under different water conditions could overcome the surplus K and Fe stress for plants in Fe ore tailings,and if so,by what mechanisms.Here,host plants(Sorghum sp.Hybrid cv.Silk),either colonized or noncolonized by the AM fungi(Glomus spp.),were cultivated in lucerne hay(LH,C:N ratio of 18)-or sugarcane mulch(SM,C:N ratio of 78)-amended Fe ore tailings under well-watered(55%water-holding capacity(WHC)of tailings)or water-deficient(30%WHC of tailings)conditions.Root mycorrhizal colonization,plant growth,and mineral elemental uptake and partitioning were examined.Results indicated that AM fungal colonization improved plant growth in tailings amended with plant biomass under water-deficient conditions.Arbuscular mycorrhizal fungal colonization enhanced plant mineral element uptake,especially P,both in the LH-and SM-amended tailings regardless of water condition.Additionally,AM symbiosis development restrained the translocation of excess elements(i.e.,K and Fe)from plant roots to shoots,thereby relieving their phytotoxicity.The AM fungal roles in P uptake and excess elemental partitioning were greater in LH-amended tailings than in SM-amended tailings.Water deficiency weakened AM fungal colonization and functions in terms of mineral element uptake and partitioning.These findings highlighted the vital role AM fungi played in regulating plant growth and nutrition status in Fe ore tailings technosol,providing an important basis for involvement of AM fungi in the eco-engineered pedogenesis of Fe ore tailings.展开更多
文摘目的探讨Klotho逆转乳腺癌紫杉醇耐药的分子机制。方法 Western blot法检测乳腺癌细胞MCF-7与紫杉醇耐药的乳腺癌细胞MCF-7/PTX中Klotho的表达情况,MTT法检测Klotho对MCF-7/PTX细胞紫杉醇耐药的影响;Western blot法考查Klotho与自噬抑制剂3-methyladenine(3-MA)对MCF-7/PTX细胞Beclin1蛋白表达的影响,并利用MTT法检测Klotho与3-MA对该细胞紫杉醇耐药的影响。结果 MCF-7/PTX细胞中Klotho的表达较MCF-7细胞低,Klotho可增强MCF-7/PTX细胞对紫杉醇的敏感性;MCF-7/PTX细胞中Beclin1表达较MCF-7细胞高,而Klotho与3-MA均可降低该细胞中Beclin1的表达,且Klotho对该细胞紫杉醇耐药的逆转作用与3-MA相仿。结论乳腺癌细胞的紫杉醇耐药与Klotho表达有关,Klotho可通过抑制自噬进而逆转乳腺癌紫杉醇耐药。
文摘This paper studies the southern part of Datong Basin and investigates, in combination with a survey on the soil properties, the salt content characteristics of the soil in the region using relevant analysis methods. The results showed that the soil salinization type of the soil in the study area is soda saline-alkaline soil, and the salt content of the profile soil tends to assemble in the soil surface. As the overall salt content is low, it is classified as moderately saline soil. However, being highly alkaline, it thus basically belongs to the moderate-to-severe level; a significant positive correlation is found between total salt quantity and exchange sodium and degree of alkalization. Exchange sodium is a factor that determines the size of alkalization degree and it also indirectly affects the p H value; special climate, topography and parent material, groundwater and soil properties, and tillage management of the region explain the formation of the large area of saline-alkali soil. This study will provide an important theoretical basis for the sustainable use of soil resources in the southern saline-alkali soil in Datong Basin.
基金funded by the National Natural Science Foundation of China(No.U20A20115)Australian Research Council Linkage Project(No.LP160100598)+2 种基金China Scholarship Council(No.201906350122)the Key Platform and Scientific Research Projects of Guangdong Provincial Education Department,China(No.2020KCXTD006)Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,China(No.2023B1212060002)。
文摘Excess available K and Fe in Fe ore tailings with organic matter amendment and water-deficiencies may restrain plant colonization and growth,which hinders the formation of eco-engineered soil from these tailings for sustainable and cost-effective mine site rehabilitation.Arbuscular mycorrhizal(AM)fungi are widely demonstrated to assist plant growth under various unfavorable environments.However,it is still unclear whether AM symbiosis in tailings amended with different types of plant biomass and under different water conditions could overcome the surplus K and Fe stress for plants in Fe ore tailings,and if so,by what mechanisms.Here,host plants(Sorghum sp.Hybrid cv.Silk),either colonized or noncolonized by the AM fungi(Glomus spp.),were cultivated in lucerne hay(LH,C:N ratio of 18)-or sugarcane mulch(SM,C:N ratio of 78)-amended Fe ore tailings under well-watered(55%water-holding capacity(WHC)of tailings)or water-deficient(30%WHC of tailings)conditions.Root mycorrhizal colonization,plant growth,and mineral elemental uptake and partitioning were examined.Results indicated that AM fungal colonization improved plant growth in tailings amended with plant biomass under water-deficient conditions.Arbuscular mycorrhizal fungal colonization enhanced plant mineral element uptake,especially P,both in the LH-and SM-amended tailings regardless of water condition.Additionally,AM symbiosis development restrained the translocation of excess elements(i.e.,K and Fe)from plant roots to shoots,thereby relieving their phytotoxicity.The AM fungal roles in P uptake and excess elemental partitioning were greater in LH-amended tailings than in SM-amended tailings.Water deficiency weakened AM fungal colonization and functions in terms of mineral element uptake and partitioning.These findings highlighted the vital role AM fungi played in regulating plant growth and nutrition status in Fe ore tailings technosol,providing an important basis for involvement of AM fungi in the eco-engineered pedogenesis of Fe ore tailings.
