目的:探讨抑郁障碍患者肠道菌群相对丰度和认知功能的特点及两者的相关性。方法:选取2021年12月至2022年6月间来自宁波市第一医院心身医学科的78例抑郁障碍患者为病例组,60名健康志愿者为对照组,使用Thinc-it工具[包括数字符号替代测试(...目的:探讨抑郁障碍患者肠道菌群相对丰度和认知功能的特点及两者的相关性。方法:选取2021年12月至2022年6月间来自宁波市第一医院心身医学科的78例抑郁障碍患者为病例组,60名健康志愿者为对照组,使用Thinc-it工具[包括数字符号替代测试(digit symbol substitution test,DSST)、选择反应时间任务(choice reaction time task,CRT)、连线测验(trail making test,TMT)-B、1-back记忆任务(1-back Memory task,1-BACK)和抑郁症认知损害5项问卷(perceived deficits questionnaire-5,PDQ-5-D)]评估认知功能,应用16SrDNA测序技术获得组间肠道菌群的相对丰度特征。采用Pearson相关性分析抑郁障碍患者肠道菌群相对丰度与认知功能的相关性。结果:与对照组相比,病例组PDQ-5-D评分、TMT-B耗时数明显升高,CRT、1-BACK、DSST计数均显著下降(P均<0.01);病例组变形菌门、肠杆菌科、埃希氏-志贺氏菌属的相对丰度较对照组升高,拟杆菌门、放线菌门、双歧杆菌科、双歧杆菌属的相对丰度均较对照组降低(P均<0.05)。变形菌门的相对丰度与PDQ-5-D评分、TMT-B耗时数均呈负相关(P均<0.05);肠杆菌科的相对丰度与PDQ-5-D评分、TMT-B耗时数呈负相关,与DSST计数呈正相关(P均<0.05);埃希氏-志贺氏菌属的相对丰度与TMT-B耗时数呈负相关,与DSST计数呈正相关(P均<0.05)。结论:抑郁障碍患者存在认知功能损害及肠道菌群相对丰度的变化,两者具有相关性。展开更多
目的:探讨次乌头碱(HA)通过环磷酸鸟苷-腺苷酸合成酶(cGAS)/干扰素基因刺激因子(STING)信号通路对胃癌细胞增殖、迁移、侵袭和免疫逃逸的影响。方法:将BGC-823细胞分为对照组(NC组)、HA低剂量组(HA-L组,2μmol/L)、HA中剂量组(HA-M组,4...目的:探讨次乌头碱(HA)通过环磷酸鸟苷-腺苷酸合成酶(cGAS)/干扰素基因刺激因子(STING)信号通路对胃癌细胞增殖、迁移、侵袭和免疫逃逸的影响。方法:将BGC-823细胞分为对照组(NC组)、HA低剂量组(HA-L组,2μmol/L)、HA中剂量组(HA-M组,4μmol/L)、HA高剂量组(HA-H组,8μmol/L)、RU.521(cGAS抑制剂)组(1μmol/L)、HA-H+RU.521组(8μmol/L+1μmol/L),CCK-8、克隆形成实验检测细胞增殖;划痕愈合实验检测细胞迁移;Transwell实验检测细胞侵袭;ELISA检测细胞上清中趋化因子配体(CXCL)2、CXCL8水平;Western blot检测细胞中增殖细胞核抗原(PCNA)、基质金属蛋白酶(MMP)-9、cGAS、STING蛋白表达。将上述各组细胞分别与NK细胞共培养24 h,命名为NC共培养组、HA-L共培养组、HA-M共培养组、HA-H共培养组、RU.521共培养组、HA-H+RU.521共培养组,检测NK细胞杀伤力。结果:与NC组比较,HA-L组、HA-M组、HA-H组BGC-823细胞OD450(24 h)(0.87±0.08 vs 0.75±0.06、0.62±0.06、0.41±0.03)、克隆形成率[(47.75±2.13)%vs(41.12±1.81)%、(33.58±1.61)%、(19.95±0.84)%]、划痕愈合率[(43.37±2.08)%vs(36.65±1.54)%、(27.74±1.03)%、(13.36±0.62)%]、侵袭细胞数(78.85±3.67 vs 65.59±2.49、51.52±2.01、22.23±1.36)、CXCL2、CXCL8水平、PCNA、MMP-9蛋白表达降低,cGAS、STING蛋白表达升高(P<0.05);与NC组比较,RU.521组对应指标变化趋势与上述相反(P<0.05);与NC共培养组比较,HA-L共培养组、HA-M共培养组、HA-H共培养组NK细胞杀伤力增强,且呈剂量依赖性(P<0.05);与NC共培养组比较,RU.521共培养组对应指标变化趋势与上述相反(P<0.05);RU.521减弱了高剂量HA对BGC-823细胞增殖、迁移、侵袭、免疫逃逸的抑制作用。结论:HA可能通过激活cGAS-STING信号通路抑制胃癌细胞增殖、迁移、侵袭和免疫逃逸。展开更多
First-principles calculations were carried out to investigate the structural stabilities and electronic properties of RhZr.The plane wave based pseudopotential method was used,in which both the local density approxima...First-principles calculations were carried out to investigate the structural stabilities and electronic properties of RhZr.The plane wave based pseudopotential method was used,in which both the local density approximation(LDA) and the generalized gradient approximation(GGA) implanted in the CASTEP code were employed.The internal positions of atoms in the unit cell were optimized and the ground state properties such as lattice parameter,density of state,cohesive energies and enthalpies of formation of ortho-RhZr and cubic-RhZr were calculated.The calculation results indicate that ortho-RhZr can form more easily than cubic-RhZr and the ortho-RhZr is more stable than cubic-RhZr.The density of states(DOS) reveals that the strong bonding in the Rh-Zr and Rh-Rh or Zr-Zr interaction chains accounts for the structural stability of ortho-RhZr and the hybridization between Rh-4d states and Zr-4d states is strong.展开更多
文摘目的:探讨抑郁障碍患者肠道菌群相对丰度和认知功能的特点及两者的相关性。方法:选取2021年12月至2022年6月间来自宁波市第一医院心身医学科的78例抑郁障碍患者为病例组,60名健康志愿者为对照组,使用Thinc-it工具[包括数字符号替代测试(digit symbol substitution test,DSST)、选择反应时间任务(choice reaction time task,CRT)、连线测验(trail making test,TMT)-B、1-back记忆任务(1-back Memory task,1-BACK)和抑郁症认知损害5项问卷(perceived deficits questionnaire-5,PDQ-5-D)]评估认知功能,应用16SrDNA测序技术获得组间肠道菌群的相对丰度特征。采用Pearson相关性分析抑郁障碍患者肠道菌群相对丰度与认知功能的相关性。结果:与对照组相比,病例组PDQ-5-D评分、TMT-B耗时数明显升高,CRT、1-BACK、DSST计数均显著下降(P均<0.01);病例组变形菌门、肠杆菌科、埃希氏-志贺氏菌属的相对丰度较对照组升高,拟杆菌门、放线菌门、双歧杆菌科、双歧杆菌属的相对丰度均较对照组降低(P均<0.05)。变形菌门的相对丰度与PDQ-5-D评分、TMT-B耗时数均呈负相关(P均<0.05);肠杆菌科的相对丰度与PDQ-5-D评分、TMT-B耗时数呈负相关,与DSST计数呈正相关(P均<0.05);埃希氏-志贺氏菌属的相对丰度与TMT-B耗时数呈负相关,与DSST计数呈正相关(P均<0.05)。结论:抑郁障碍患者存在认知功能损害及肠道菌群相对丰度的变化,两者具有相关性。
文摘目的:探讨次乌头碱(HA)通过环磷酸鸟苷-腺苷酸合成酶(cGAS)/干扰素基因刺激因子(STING)信号通路对胃癌细胞增殖、迁移、侵袭和免疫逃逸的影响。方法:将BGC-823细胞分为对照组(NC组)、HA低剂量组(HA-L组,2μmol/L)、HA中剂量组(HA-M组,4μmol/L)、HA高剂量组(HA-H组,8μmol/L)、RU.521(cGAS抑制剂)组(1μmol/L)、HA-H+RU.521组(8μmol/L+1μmol/L),CCK-8、克隆形成实验检测细胞增殖;划痕愈合实验检测细胞迁移;Transwell实验检测细胞侵袭;ELISA检测细胞上清中趋化因子配体(CXCL)2、CXCL8水平;Western blot检测细胞中增殖细胞核抗原(PCNA)、基质金属蛋白酶(MMP)-9、cGAS、STING蛋白表达。将上述各组细胞分别与NK细胞共培养24 h,命名为NC共培养组、HA-L共培养组、HA-M共培养组、HA-H共培养组、RU.521共培养组、HA-H+RU.521共培养组,检测NK细胞杀伤力。结果:与NC组比较,HA-L组、HA-M组、HA-H组BGC-823细胞OD450(24 h)(0.87±0.08 vs 0.75±0.06、0.62±0.06、0.41±0.03)、克隆形成率[(47.75±2.13)%vs(41.12±1.81)%、(33.58±1.61)%、(19.95±0.84)%]、划痕愈合率[(43.37±2.08)%vs(36.65±1.54)%、(27.74±1.03)%、(13.36±0.62)%]、侵袭细胞数(78.85±3.67 vs 65.59±2.49、51.52±2.01、22.23±1.36)、CXCL2、CXCL8水平、PCNA、MMP-9蛋白表达降低,cGAS、STING蛋白表达升高(P<0.05);与NC组比较,RU.521组对应指标变化趋势与上述相反(P<0.05);与NC共培养组比较,HA-L共培养组、HA-M共培养组、HA-H共培养组NK细胞杀伤力增强,且呈剂量依赖性(P<0.05);与NC共培养组比较,RU.521共培养组对应指标变化趋势与上述相反(P<0.05);RU.521减弱了高剂量HA对BGC-823细胞增殖、迁移、侵袭、免疫逃逸的抑制作用。结论:HA可能通过激活cGAS-STING信号通路抑制胃癌细胞增殖、迁移、侵袭和免疫逃逸。
基金Project(u0837601)supported by the National Natural Science Foundation of China
文摘First-principles calculations were carried out to investigate the structural stabilities and electronic properties of RhZr.The plane wave based pseudopotential method was used,in which both the local density approximation(LDA) and the generalized gradient approximation(GGA) implanted in the CASTEP code were employed.The internal positions of atoms in the unit cell were optimized and the ground state properties such as lattice parameter,density of state,cohesive energies and enthalpies of formation of ortho-RhZr and cubic-RhZr were calculated.The calculation results indicate that ortho-RhZr can form more easily than cubic-RhZr and the ortho-RhZr is more stable than cubic-RhZr.The density of states(DOS) reveals that the strong bonding in the Rh-Zr and Rh-Rh or Zr-Zr interaction chains accounts for the structural stability of ortho-RhZr and the hybridization between Rh-4d states and Zr-4d states is strong.