基于电子显微学的原子级三维重构技术对揭示材料的微观结构,加深材料结构和性能关系的理解具有极为重要的意义。原子级电子断层成像技术(atomic electron tomography,AET)作为当前最先进的三维重构技术之一,已先后成功表征了纳米颗粒中...基于电子显微学的原子级三维重构技术对揭示材料的微观结构,加深材料结构和性能关系的理解具有极为重要的意义。原子级电子断层成像技术(atomic electron tomography,AET)作为当前最先进的三维重构技术之一,已先后成功表征了纳米颗粒中原子位置、晶体缺陷、早期形核过程中原子的动态变化及非晶态固体的三维原子结构。本文综述了AET的流程及应用的突破,以期望读者了解AET的基本原理流程和应用,并探讨未来AET在解决物理、化学、材料科学等领域基础问题的前景与挑战。展开更多
目的通过高通量16S r DNA测序,探讨不同中医证型原发性失眠患者肠道菌群差异。方法选择原发性失眠患者65例,按中医证型分为肝郁化火组22例、心脾两虚组17例、阴虚火旺组26例,健康体检者47例为对照组。采用高通量16S r DNA测序方法分析...目的通过高通量16S r DNA测序,探讨不同中医证型原发性失眠患者肠道菌群差异。方法选择原发性失眠患者65例,按中医证型分为肝郁化火组22例、心脾两虚组17例、阴虚火旺组26例,健康体检者47例为对照组。采用高通量16S r DNA测序方法分析患者便菌群结构,QIIME软件与R语言stats包等分析菌群差异。结果共得到1226个不同的基因序列分类单元(OTUs),4组间差异有统计学意义的OTUs共180个(P<0.05),表明样品有丰富的菌落。肝郁化火组、阴虚火旺组测序序列的定位个数多于心脾两虚组及对照组(P<0.05)。非加权Uni Frac分析显示,组间差异显著大于组内差异,表明分组有意义(R=0.103,P=0.002),提示肠道菌群多样性与失眠不同证型高度相关。属水平在不同组间明显差异共57个属(P<0.05),所有物种水平不同组间明显差异共115个物种(P<0.05)。对照组优势菌属包括:普雷沃氏菌属(prevotella)、巨单胞菌属(megamonas)、梭菌属(clostridiumⅪ、clostridiuumⅩⅧ)、魏斯氏菌属(weissella)、拟普雷沃氏菌属(alloprevotella);肝郁化火组优势菌属包括:考拉杆菌属(phascolarctobacterium)、黄杆菌属(flavonifractor)、埃格特菌属(eggerthella)、嗜胆菌属(bilophila);心脾两虚组优势菌属包括:鞘氨醇单胞菌属(sphingomonas)、甲基杆菌属(methylobacterium);阴虚火旺组优势菌属包括:拟杆菌属(bacteroides)、副拟杆菌属(parabacteroides)、parasutterella、butyricimonas、odoribacter。结论原发性失眠患者具有丰富的肠道菌群多样性及不同菌群结构,可能影响着不同中医证候的发生、发展及结局。展开更多
Objective： To determine the gene location of two Gitelman syndrome （GS） family SLC12A3 genes and explore treatments using Chinese medicine （CM） prescriptions. Methods： In order to locate the two GS mutations, sa...Objective： To determine the gene location of two Gitelman syndrome （GS） family SLC12A3 genes and explore treatments using Chinese medicine （CM） prescriptions. Methods： In order to locate the two GS mutations, samples were collected from 11 people from two different pedigrees for direct genetic sequencing and comparison of the 26 exons of SLC12A3. Furthermore, the change of serum potassium was monitored throughout the therapy and those two probands undertook a sequential superposition of Western medicine （including potassium, Panangin and potassium-sparing diuretics） with CM prescription based on Buyang Huanwu Decoction （补阳还五汤） and Sijunzi Decoction （四君子汤）. The treatment included three stages, oral potassium chloride for the first 2 weeks （stage 1）, potassium-sparing diuretic and Panangin with potassium chloride for the next 2 weeks （stage 2）, CM along with the medicine in stage 2 for the final 2 weeks （stage 3）. Results： The three mutations occurring in proband 1 from pedigree 1 were Thr60Met, 965-1_976de113ins12 （small indels mutation） and Ala122Ala （homozygous silent mutation）. Likewise, three mutations, Asn359Lys, Thr382Met and Arg913GIn, appeared in the proband 2 from pedigree Ⅱ. The serum potassium levels increasing from baseline to sequential stages were 1.63 mmol/L （baseline）, 2.5 mmol/L （stage 1）, 3.1 mmol/L （stage 2） and 3.9 mmol/L （stage 3） in the proband 1, and 2.8 mmol/L （baseline）, 3.1 mmol/L （stage 1）, 3.5 mmol/L （stage 2） and 4.3 mmol/L （stage 3） in the proband 2, respectively. The symptoms （numbness of limbs, weakness, palpitations, etc.） of both probands were all alleviated. Conclusions： The mutations of both GS pedigrees can be defined as compound heterozygous mutations, most of which are known as missense mutations. Applying CM could be an appropriate choice for future intervention of GS.展开更多
文摘基于电子显微学的原子级三维重构技术对揭示材料的微观结构,加深材料结构和性能关系的理解具有极为重要的意义。原子级电子断层成像技术(atomic electron tomography,AET)作为当前最先进的三维重构技术之一,已先后成功表征了纳米颗粒中原子位置、晶体缺陷、早期形核过程中原子的动态变化及非晶态固体的三维原子结构。本文综述了AET的流程及应用的突破,以期望读者了解AET的基本原理流程和应用,并探讨未来AET在解决物理、化学、材料科学等领域基础问题的前景与挑战。
文摘目的通过高通量16S r DNA测序,探讨不同中医证型原发性失眠患者肠道菌群差异。方法选择原发性失眠患者65例,按中医证型分为肝郁化火组22例、心脾两虚组17例、阴虚火旺组26例,健康体检者47例为对照组。采用高通量16S r DNA测序方法分析患者便菌群结构,QIIME软件与R语言stats包等分析菌群差异。结果共得到1226个不同的基因序列分类单元(OTUs),4组间差异有统计学意义的OTUs共180个(P<0.05),表明样品有丰富的菌落。肝郁化火组、阴虚火旺组测序序列的定位个数多于心脾两虚组及对照组(P<0.05)。非加权Uni Frac分析显示,组间差异显著大于组内差异,表明分组有意义(R=0.103,P=0.002),提示肠道菌群多样性与失眠不同证型高度相关。属水平在不同组间明显差异共57个属(P<0.05),所有物种水平不同组间明显差异共115个物种(P<0.05)。对照组优势菌属包括:普雷沃氏菌属(prevotella)、巨单胞菌属(megamonas)、梭菌属(clostridiumⅪ、clostridiuumⅩⅧ)、魏斯氏菌属(weissella)、拟普雷沃氏菌属(alloprevotella);肝郁化火组优势菌属包括:考拉杆菌属(phascolarctobacterium)、黄杆菌属(flavonifractor)、埃格特菌属(eggerthella)、嗜胆菌属(bilophila);心脾两虚组优势菌属包括:鞘氨醇单胞菌属(sphingomonas)、甲基杆菌属(methylobacterium);阴虚火旺组优势菌属包括:拟杆菌属(bacteroides)、副拟杆菌属(parabacteroides)、parasutterella、butyricimonas、odoribacter。结论原发性失眠患者具有丰富的肠道菌群多样性及不同菌群结构,可能影响着不同中医证候的发生、发展及结局。
基金Supported by grants from Fujian Province Natural Science Fund Project(No.2013J01277)Financial Scheme for Young Talents Training Programme of Fujian Health Industry(No.2013-ZQN-JC-6)
文摘Objective： To determine the gene location of two Gitelman syndrome （GS） family SLC12A3 genes and explore treatments using Chinese medicine （CM） prescriptions. Methods： In order to locate the two GS mutations, samples were collected from 11 people from two different pedigrees for direct genetic sequencing and comparison of the 26 exons of SLC12A3. Furthermore, the change of serum potassium was monitored throughout the therapy and those two probands undertook a sequential superposition of Western medicine （including potassium, Panangin and potassium-sparing diuretics） with CM prescription based on Buyang Huanwu Decoction （补阳还五汤） and Sijunzi Decoction （四君子汤）. The treatment included three stages, oral potassium chloride for the first 2 weeks （stage 1）, potassium-sparing diuretic and Panangin with potassium chloride for the next 2 weeks （stage 2）, CM along with the medicine in stage 2 for the final 2 weeks （stage 3）. Results： The three mutations occurring in proband 1 from pedigree 1 were Thr60Met, 965-1_976de113ins12 （small indels mutation） and Ala122Ala （homozygous silent mutation）. Likewise, three mutations, Asn359Lys, Thr382Met and Arg913GIn, appeared in the proband 2 from pedigree Ⅱ. The serum potassium levels increasing from baseline to sequential stages were 1.63 mmol/L （baseline）, 2.5 mmol/L （stage 1）, 3.1 mmol/L （stage 2） and 3.9 mmol/L （stage 3） in the proband 1, and 2.8 mmol/L （baseline）, 3.1 mmol/L （stage 1）, 3.5 mmol/L （stage 2） and 4.3 mmol/L （stage 3） in the proband 2, respectively. The symptoms （numbness of limbs, weakness, palpitations, etc.） of both probands were all alleviated. Conclusions： The mutations of both GS pedigrees can be defined as compound heterozygous mutations, most of which are known as missense mutations. Applying CM could be an appropriate choice for future intervention of GS.
