期刊文献+
共找到7,722篇文章
< 1 2 250 >
每页显示 20 50 100
血清趋化因子C-C配体19与21水平在住院心力衰竭患者中的预后价值
1
作者 曾文飞 李玲 +3 位作者 林凯玲 黄道昕 李力 余惠珍 《中华高血压杂志(中英文)》 北大核心 2025年第7期669-679,共11页
目的观察血清趋化因子C-C配体19(CCL19)和CCL21水平在住院心力衰竭(心衰)患者中的预后价值。方法入选2018年12月至2021年10月于福建省立医院南院心内科住院的心衰患者共221例(心衰组),同期健康体检的55名体检者作为对照组,出院后定期随... 目的观察血清趋化因子C-C配体19(CCL19)和CCL21水平在住院心力衰竭(心衰)患者中的预后价值。方法入选2018年12月至2021年10月于福建省立医院南院心内科住院的心衰患者共221例(心衰组),同期健康体检的55名体检者作为对照组,出院后定期随访。采用酶联免疫吸附试验法检测血清CCL19和CCL21水平,收集两组患者临床基线资料信息。采用时间依赖性受试者操作特征(ROC)曲线、Kaplan-Meier生存曲线和Cox回归分析评估CCL19和CCL21对心衰的预后价值。结果最终纳入心衰患者170例,中位随访时间为722.5(396.5,898.0)d,全因死亡30例,78例发生复合终点事件(包括全因死亡、急性心肌梗死、恶性心律失常、猝死和心衰再入院)。心衰患者血清CCL19和CCL21浓度较对照组高。多因素Cox回归分析显示,校正心血管危险因素后,CCL19、CCL21升高以及CCL19与CCL21均升高与心衰患者全因死亡风险相关[HR(95%CI)分别为3.904(1.561~9.760)、3.946(1.561~9.978)、6.048(2.646~13.824)];CCL21以及CCL19与CCL21均升高与复合终点事件发生率升高相关[HR(95%CI)分别为2.204(1.350~3.599)、1.883(1.157~3.066)]。时间依赖性ROC曲线分析提示,CCL19、CCL21以及CCL19联合CCL21均升高可以预测各时间点心衰患者的全因死亡和远期复合终点事件的发生。Kaplan-Meier曲线显示,血清CCL19、CCL21以及CCL19联合CCL21均升高的心衰患者全因死亡率及复合终点事件发生率高(P<0.05)。结论心衰患者血清CCL19和CCL21水平明显升高,与心衰患者全因死亡相关,CCL21升高与心衰患者复合终点事件发生相关。 展开更多
关键词 趋化因子c-c配体19 趋化因子c-c配体21 心力衰竭 预后
原文传递
C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 pathway as a therapeutic target and regulatory mechanism for spinal cord injury 被引量:1
2
作者 Xiangzi Wang Xiaofei Niu +4 位作者 Yingkai Wang Yang Liu Cheng Yang Xuyi Chen Zhongquan Qi 《Neural Regeneration Research》 SCIE CAS 2025年第8期2231-2244,共14页
Spinal cord injury involves non-reversible damage to the central nervous system that is characterized by limited regenerative capacity and secondary inflammatory damage.The expression of the C-C motif chemokine ligand... Spinal cord injury involves non-reversible damage to the central nervous system that is characterized by limited regenerative capacity and secondary inflammatory damage.The expression of the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis exhibits significant differences before and after injury.Recent studies have revealed that the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis is closely associated with secondary inflammatory responses and the recruitment of immune cells following spinal cord injury,suggesting that this axis is a novel target and regulatory control point for treatment.This review comprehensively examines the therapeutic strategies targeting the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis,along with the regenerative and repair mechanisms linking the axis to spinal cord injury.Additionally,we summarize the upstream and downstream inflammatory signaling pathways associated with spinal cord injury and the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis.This review primarily elaborates on therapeutic strategies that target the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis and the latest progress of research on antagonistic drugs,along with the approaches used to exploit new therapeutic targets within the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis and the development of targeted drugs.Nevertheless,there are presently no clinical studies relating to spinal cord injury that are focusing on the C-C motif chemokine ligand 2/C-C motif chemokine receptor 2 axis.This review aims to provide new ideas and therapeutic strategies for the future treatment of spinal cord injury. 展开更多
关键词 apoptosis c-c motif chemokine ligand 2/c-c motif chemokine receptor 2 pathway c-c motif chemokine receptor 2 antagonists chemokine ligand 2 chemokine receptor 2 inflammation macrophage microglia spinal cord injury therapeutic method
暂未订购
血清MC-CP、CCL26、DcR3水平在COPD并发OSAS诊断中的临床价值 被引量:1
3
作者 陈丽萍 史永兴 +4 位作者 陈艳红 冯平 张长洪 林卫佳 项保利 《基础医学与临床》 CAS 2025年第1期76-80,共5页
目的探究血清肥大细胞羧肽酶(MC-CP)、趋化因子26(CCL26)、诱饵受体3(DcR3)水平在慢性阻塞性肺疾病(COPD)并发阻塞性睡眠呼吸暂停综合征(OSAS)诊断中的临床价值。方法选取2021年1月至2023年1月河北北方学院附属第一医院收治的COPD患者90... 目的探究血清肥大细胞羧肽酶(MC-CP)、趋化因子26(CCL26)、诱饵受体3(DcR3)水平在慢性阻塞性肺疾病(COPD)并发阻塞性睡眠呼吸暂停综合征(OSAS)诊断中的临床价值。方法选取2021年1月至2023年1月河北北方学院附属第一医院收治的COPD患者90例,其中单纯COPD患者48例即为COPD组,COPD合并OSAS患者42例即为COPD-OSAS组。同期选取在河北北方学院附属第一医院体检健康志愿者48例为对照组。采用酶联免疫吸附试验(ELISA)检测血清MC-CP、CCL26、DcR3水平。受试者工作特征(ROC)和曲线下面积(AUC)分析血清MC-CP、CCL26、DcR3水平在COPD并发OSAS诊断中的临床价值。多因素Logistic回归分析COPD并发OSAS的影响因素。结果与对照组相比,COPD组和COPD-OSAS组患者吸烟指数、C反应蛋白(CRP)、白细胞计数(WBC)水平依次显著升高,1秒钟用力呼气容积与用力肺活量的比(FEV1/FVC)依次显著降低(P<0.05);与对照组相比,COPD组和COPD-OSAS组患者MC-CP、CCL26、DcR3水平依次显著升高(P<0.05);血清MC-CP、CCL26、DcR33者联合对COPD并发OSAS诊断的AUC比单独诊断的更高(Z=4.066,P<0.001;Z=2.391,P<0.05;Z=2.353,P<0.05)。多因素Logistic回归分析显示,吸烟指数、MC-CP、CCL26、DcR3水平是COPD并发OSAS的影响因素(P<0.05)。结论COPD并发OSAS患者血清中MC-CP、CCL26、DcR3表达水平升高,三者联合可提高对COPD并发OSAS的诊断价值。 展开更多
关键词 肥大细胞羧肽酶 趋化因子26 诱饵受体3 慢性阻塞性肺疾病 阻塞性睡眠呼吸暂停综合征
暂未订购
二甲双胍调节C-C基序趋化因子配体2/C-C基序趋化因子受体2轴对糖尿病大鼠17型辅助T细胞/调节性T细胞平衡影响的研究
4
作者 刘前华 周俊洪 +2 位作者 李朝敏 吴宇 谭薇 《中国糖尿病杂志》 北大核心 2025年第8期623-630,共8页
目的探讨二甲双胍(Met)调节C-C基序趋化因子配体2(CCL2)/C-C基序趋化因子受体2(CCR2)轴对DM大鼠17型辅助T细胞(Th17)/调节性T细胞(Treg)平衡的影响。方法取SD大鼠50只随机分为正常对照(NC)组、模型(Mod)组、Met(100 mg/kg)组、Met+空载(... 目的探讨二甲双胍(Met)调节C-C基序趋化因子配体2(CCL2)/C-C基序趋化因子受体2(CCR2)轴对DM大鼠17型辅助T细胞(Th17)/调节性T细胞(Treg)平衡的影响。方法取SD大鼠50只随机分为正常对照(NC)组、模型(Mod)组、Met(100 mg/kg)组、Met+空载(Met+oe-NC)组、Met+CCL2过表达(Met+oe-CCL2)组,每组10只。观察各组FBG变化,HE染色检测各组胰腺中胰岛组织变化并进行病理评分,流式细胞术检测各组外周血Th17/Treg比值,ELISA检测各组血清IL-17、TNF-α、TGF-β、IL-10水平,免疫荧光检测各组胰腺组织Th17、Treg浸润比例,RT-PCR和Western blot检测各组胰腺组织视黄酸受体相关孤儿受体γt(ROR-γt)、叉头框蛋白P3(FOXP3)、CCL2、CCR2 mRNA及蛋白表达。结果NC组胰岛组织中胰岛结构完好且边界清晰,无病理损伤,Mod组胰岛组织呈现明显病理损伤,可见胰岛结构受损明显且体积缩小,与周围组织间分界不清,胰岛内细胞分布杂乱且缺失明显,与Mod组比较,Met、Met+oe-NC组胰岛组织病理损伤均减轻,与Met组比较,Met+oe-CCL2组病理损伤加重。Mod组FBG、Th17/Treg比值、IL-17、TNF-α、Th17浸润比例、ROR-γt、CCL2、CCR2 mRNA及蛋白表达高于NC组(P<0.05),TGF-β、IL-10、Treg浸润比例、FOXP3 mRNA及蛋白表达低于NC组(P<0.05)。Met、Met+oe-NC组FBG、Th17/Treg比值、IL-17、TNF-α、Th17浸润比例、ROR-γt、CCL2、CCR2 mRNA及蛋白表达低于Mod组(P<0.05),TGF-β、IL-10、Treg浸润比例、FOXP3 mRNA及蛋白表达高于Mod组(P<0.05)。Met+oe-CCL2组FBG、Th17/Treg比值、IL-17、TNF-α、Th17浸润比例、ROR-γt、CCL2、CCR2 mRNA及蛋白表达高于Met组(P<0.05),TGF-β、IL-10、Treg浸润比例、FOXP3 mRNA及蛋白表达高于Met组(P<0.05)。结论Met可通过抑制CCL2/CCR2轴激活促使Th17/Treg细胞平衡向Treg方向漂移,抑制炎症反应发生发展,减轻DM大鼠胰岛损伤,改善其糖代谢。 展开更多
关键词 二甲双胍 c-c基序趋化因子配体2/c-c基序趋化因子受体2轴 糖尿病 17型辅助T细胞/调节性T细胞比值
原文传递
Design and Optimization of Anode Catalysts for Direct Ethanol Fuel Cells:Advances and Challenges in C-C bond Activation and Selective Modulation of the C1 Pathway
5
作者 Kai-Chi Qin Meng-Tian Huo +3 位作者 Yu Liang Si-Yuan Zhu Zi-Hao Xing Jin-Fa Chang 《电化学(中英文)》 北大核心 2025年第8期1-22,共22页
Direct ethanol fuel cells(DEFCs)are a promising alternative to conventional energy sources,offering high energy density,environmental sustainability,and operational safety.Compared to methanol fuel cells,DEFCs exhibit... Direct ethanol fuel cells(DEFCs)are a promising alternative to conventional energy sources,offering high energy density,environmental sustainability,and operational safety.Compared to methanol fuel cells,DEFCs exhibit lower toxicity and a more mature preparation process.Unlike hydrogen fuel cells,DEFCs provide superior storage and transport feasibility,as well as cost-effectiveness,significantly enhancing their commercial viability.However,the stable C-C bond in ethanol creates a high activation energy barrier,often resulting in incomplete electrooxidation.Current commercial platinum(Pt)-and palladium(Pd)-based catalysts demonstrate low C-C bond cleavage efficiency(<7.5%),severely limiting DEFC energy output and power density.Furthermore,high catalyst costs and insufficient activity impede large-scale commercialization.Recent advances in DEFC anode catalyst design have focused on optimizing material composition and elucidating catalytic mechanisms.This review systematically examines developments in ethanol electrooxidation catalysts over the past five years,highlighting strategies to improve C1 pathway selectivity and C-C bond activation.Key approaches,such as alloying,nanostructure engineering,and interfacial synergy effects,are discussed alongside their mechanistic implications.Finally,we outline current challenges and future prospects for DEFC commercialization. 展开更多
关键词 Direct ethanol fuel cells Ethanol electrooxidation c-c bond cleavage ELECTROCATALYSIS Anode catalyst
在线阅读 下载PDF
C-C基序趋化因子配体2在胶质瘤发病机制中的作用研究进展
6
作者 程厚翔 代军强 +1 位作者 阎云基 潘亚文 《国际神经病学神经外科学杂志》 2025年第1期53-62,共10页
C-C基序趋化因子配体2(CCL2)作为一种经典的趋化因子,最初被认为参与免疫细胞浸润和炎症反应。近年来发现与多种恶性肿瘤的发病密切相关。CCL2与其受体CCR2组成CCL2-CCR2信号轴,在胶质瘤的病理血管生成、细胞生长、迁移运动和免疫抑制... C-C基序趋化因子配体2(CCL2)作为一种经典的趋化因子,最初被认为参与免疫细胞浸润和炎症反应。近年来发现与多种恶性肿瘤的发病密切相关。CCL2与其受体CCR2组成CCL2-CCR2信号轴,在胶质瘤的病理血管生成、细胞生长、迁移运动和免疫抑制等方面发挥作用,促进胶质瘤的增殖、侵袭和复发。此外,CCL2的表达水平与胶质瘤患者的预后高度相关,可作为一种判断胶质瘤预后的潜在生物标志物。该文旨在回顾近年来CCL2的相关研究,对其参与胶质瘤细胞生长、侵袭、血管生成、免疫抑制、细胞招募的相关分子机制以及在胶质瘤中的临床意义做一综述。 展开更多
关键词 胶质瘤 c-c基序趋化因子配体2 趋化因子 信号通路 分子机制
暂未订购
Understanding the C-C coupling mechanism in electrochemical CO reduction at low CO coverage:Dynamic change in site preference matters
7
作者 Zhe Chen Tao Wang 《Chinese Journal of Catalysis》 2025年第2期193-202,共10页
A thoroughly mechanistic understanding of the electrochemical CO reduction reaction(eCORR)at the interface is significant for guiding the design of high-performance electrocatalysts.However,unintentionally ignored fac... A thoroughly mechanistic understanding of the electrochemical CO reduction reaction(eCORR)at the interface is significant for guiding the design of high-performance electrocatalysts.However,unintentionally ignored factors or unreasonable settings during mechanism simulations will result in false positive results between theory and experiment.Herein,we computationally identified the dynamic site preference change of CO adsorption with potentials on Cu(100),which was a previously unnoticed factor but significant to potential-dependent mechanistic studies.Combined with the different lateral interactions among adsorbates,we proposed a new C–C coupling mechanism on Cu(100),better explaining the product distribution at different potentials in experimental eCORR.At low potentials(from–0.4 to–0.6 V_(RHE)),the CO forms dominant adsorption on the bridge site,which couples with another attractively aggregated CO to form a C–C bond.At medium potentials(from–0.6 to–0.8 VRHE),the hollow-bound CO becomes dominant but tends to isolate with another adsorbate due to the repulsion,thereby blocking the coupling process.At high potentials(above–0.8 VRHE),the CHO intermediate is produced from the electroreduction of hollow-CO and favors the attraction with another bridge-CO to trigger C–C coupling,making CHO the major common intermediate for C–C bond formation and methane production.We anticipate that our computationally identified dynamic change in site preference of adsorbates with potentials will bring new opportunities for a better understanding of the potential-dependent electrochemical processes. 展开更多
关键词 Electrochemical CO reduction reaction Lowco coverage Dynamic site-preference Potential-dependent c-c coupling Constant-potential density functional theory
在线阅读 下载PDF
血清C-C基序趋化因子配体11与磷酸化神经丝蛋白重链联合预测2型糖尿病周围神经病变的临床价值
8
作者 叶飞 笪义生 王剑 《实用临床医药杂志》 2025年第16期89-95,共7页
目的探讨血清C-C基序趋化因子配体11(CCL11)、磷酸化神经丝蛋白重链(pNF-H)在糖尿病周围神经病变(DPN)中的表达及临床意义。方法选取2型糖尿病(T2DM)患者174例作为T2DM组,另选取同期健康体检志愿者87名为对照组。T2DM患者根据是否发生DP... 目的探讨血清C-C基序趋化因子配体11(CCL11)、磷酸化神经丝蛋白重链(pNF-H)在糖尿病周围神经病变(DPN)中的表达及临床意义。方法选取2型糖尿病(T2DM)患者174例作为T2DM组,另选取同期健康体检志愿者87名为对照组。T2DM患者根据是否发生DPN分为DPN组和非DPN组。DPN患者根据病情程度[多伦多临床评分系统(TCSS)评分]分为轻度DPN组、中度DPN组和重度DPN组。采用酶联免疫吸附试验检测CCL11、pNF-H水平。采用Pearson相关分析法分析DPN患者血清CCL11、pNF-H水平与TCSS评分的相关性;采用多因素非条件Logistic回归分析法筛选T2DM患者DPN的影响因素。绘制受试者工作特征(ROC)曲线分析血清CCL11、pNF-H水平对T2DM患者发生DPN的预测价值。结果T2DM组血清CCL11、pNF-H水平高于对照组,差异有统计学意义(P<0.05)。T2DM组DPN发生率为47.13%(82/174)。DPN组年龄大于非DPN组,病程长于非DPN组,空腹血糖、HbA1c、CCL11、pNF-H水平高于非DPN组,差异有统计学意义(P<0.05)。轻度DPN组、中度DPN组和重度DPN组血清CCL11、pNF-H水平依次升高,差异有统计学意义(P<0.05)。DPN患者血清CCL11、pNF-H水平与TCSS评分呈正相关(r=0.661、0.619,P<0.001)。病程延长、糖化血红蛋白高、CCL11高、pNF-H高为T2DM患者DPN的独立危险因素(P<0.05)。血清CCL11、pNF-H水平联合预测T2DM患者DPN的曲线下面积为0.861,大于血清CCL11、pNF-H水平单独预测的0.751、0.765(P<0.05)。经1000次Bootstrap法自抽样内部验证,二者联合预测的一致性指数为0.861。结论血清CCL11、pNF-H水平升高与T2DM患者DPN发生独立相关,且随着DPN病情加重而升高,二者联合应用对T2DM患者DPN具有较高的预测价值。 展开更多
关键词 2型糖尿病 c-c基序趋化因子配体11 磷酸化神经丝蛋白重链 糖尿病周围神经病变 独立危险因素 预测模型 炎症 轴突损伤
暂未订购
C-X-C基序趋化因子配体16联合C-C基序趋化因子配体21预测儿童变应性鼻炎-哮喘综合征肺功能损伤及病情控制的价值
9
作者 李青 罗婷婷 程雨嘉 《实用临床医药杂志》 2025年第18期62-69,共8页
目的探讨C-X-C基序趋化因子配体16(CXCL16)联合C-C基序趋化因子配体21(CCL21)预测儿童变应性鼻炎-哮喘综合征(CARAS)肺功能损伤及病情控制的价值。方法前瞻性选取2022年1月—2024年12月陕西省宝鸡市人民医院收治的CARAS患儿108例(CARAS... 目的探讨C-X-C基序趋化因子配体16(CXCL16)联合C-C基序趋化因子配体21(CCL21)预测儿童变应性鼻炎-哮喘综合征(CARAS)肺功能损伤及病情控制的价值。方法前瞻性选取2022年1月—2024年12月陕西省宝鸡市人民医院收治的CARAS患儿108例(CARAS组)、单纯哮喘患儿108例(哮喘组)、单纯变应性鼻炎(AR)患儿108例(AR组)为研究对象。比较各组外周血CXCL16、CCL21水平和肺功能指标[峰值呼气流速(PEF)、第1秒用力呼气容积占预计值百分比(FEV_(1)%pred)、第1秒用力呼气容积与用力肺活量比值(FEV_(1)/FVC)]。采用皮尔逊相关性分析探讨CARAS患儿外周血CXCL16、CCL21水平与肺功能指标的相关性。治疗完成后随访3个月,根据病情控制情况的不同将CARAS患儿分为控制不良组和控制良好组。采用多因素Logistic回归和受试者工作特征(ROC)曲线分析外周血CXCL16、CCL21水平与CARAS患儿病情控制不良的关系及预测效能。结果AR组、哮喘组、CARAS组外周血CXCL16、CCL21水平依次升高,PEF、FEV_(1)%pred、FEV_(1)/FVC依次降低,差异均有统计学意义(P<0.05)。花粉组、尘螨组、动物皮屑组、其他组外周血CXCL16、CCL21、PEF、FEV_(1)%pred、FEV_(1)/FVC比较,差异均无统计学意义(P>0.05)。皮尔逊相关性分析显示,CARAS患儿外周血CXCL16、CCL21水平与PEF、FEV_(1)%pred、FEV_(1)/FVC呈负相关(r=-0.629、-0.668、-0.710、-0.645、-0.672、-0.697,均P<0.001)。随访3个月,108例CARAS患儿治疗后病情控制不良率为47.22%(51/108)。单因素分析显示,总免疫球蛋白E(IgE)、嗜酸粒细胞(EOS)计数、呼出气一氧化氮(FeNO)、PEF、FEV_(1)%pred、FEV_(1)/FVC、CXCL16、CCL21与CARAS患儿病情控制不良相关(P<0.05)。Logistic回归分析显示,EOS计数高、FeNO高、CXCL16高、CCL21高为CARAS患儿病情控制不良的独立危险因素(P<0.05)。ROC曲线显示,外周血CXCL16、CCL21水平及二者联合预测CARAS患儿病情控制不良的曲线下面积为0.843、0.820、0.917,二者联合预测效能优于外周血CXCL16、CCL21水平单独预测(Z=2.054、2.312,P=0.040、0.021)。结论外周血CXCL16、CCL21水平升高与CARAS患儿肺功能下降和病情控制不良密切相关,二者联合预测病情控制不良的效能较高。 展开更多
关键词 C-X-C基序趋化因子配体16 c-c基序趋化因子配体21 变应性鼻炎-哮喘综合征 峰值呼气流速 第1秒用力呼气容积 嗜酸粒细胞 呼出气一氧化氮 病情控制
暂未订购
干扰素基因刺激因子、C-C模式趋化因子配体5、干扰素调节因子3和细胞程序性死亡配体1在肺鳞癌中的表达及临床意义
10
作者 蔡忠福 黄记水 +4 位作者 洪文聪 李晓彬 黄燕玲 戴文良 洪友志 《实用临床医药杂志》 2025年第10期57-62,共6页
目的 分析干扰素基因刺激因子(STING)、C-C模式趋化因子配体5(CCL5)、干扰素调节因子3(IRF3)及细胞程序性死亡配体1(PDL1)在肺鳞癌中的表达及其临床意义。方法 选取56例肺鳞癌患者作为研究对象,收集其切除癌组织及距癌灶边缘>5 cm的... 目的 分析干扰素基因刺激因子(STING)、C-C模式趋化因子配体5(CCL5)、干扰素调节因子3(IRF3)及细胞程序性死亡配体1(PDL1)在肺鳞癌中的表达及其临床意义。方法 选取56例肺鳞癌患者作为研究对象,收集其切除癌组织及距癌灶边缘>5 cm的癌旁组织。采用免疫组化法检测STING、CCL5、IRF3及PDL1表达。分析STING、CCL5、IRF3及PDL1与患者临床资料的相关性。分析肺鳞癌组织中STING、CCL5、IRF3及PDL1表达与预后的关系。分析肺鳞癌患者预后的影响因素。结果 肺鳞癌组织中STING阳性率低于癌旁组织,CCL5、IRF3、PDL1阳性率高于癌旁组织,差异有统计学意义(P<0.05)。STING、CCL5、IRF3、PDL1表达水平与肿瘤直径、TNM分期、淋巴结转移、分化程度有关(P<0.05)。STING阳性表达患者3年生存率高于STING阴性表达患者,差异有统计学意义(P<0.05)。CCL5阳性、IRF3阳性和PDL1阳性表达患者的3年生存率分别低于CCL5阴性、IRF3阴性和PDL1阴性表达患者,差异有统计学意义(P<0.05)。STING、CCL5、IRF3、PDL1是肺鳞癌患者预后的影响因素(P<0.05)。结论 在肺鳞癌组织中,STING呈低表达,CCL5、IRF3、PDL1呈高表达,其在肺鳞癌患者预后的评估中具有重要临床价值。 展开更多
关键词 干扰素基因刺激因子 c-c模式趋化因子配体5 干扰素调节因子3 细胞程序性死亡配体1 肺鳞癌 阳性表达 免疫组化 预后评估
暂未订购
Collaborative photocatalytic C-C coupling with Cu and P dual sites to produce C_(2)H_(4) over CuxP/g-C_(3)N_(4) heterojunction
11
作者 Dongxiao Wen Nan Wang +2 位作者 Jiahe Peng Tetsuro Majima Jizhou Jiang 《Chinese Journal of Catalysis》 2025年第2期58-74,共17页
Light-driven CO_(2) reduction reaction(CO_(2)RR)to value-added ethylene(C2H4)holds significant promise for addressing energy and environmental challenges.While the high energy barriers for*CO intermediates hydrogenati... Light-driven CO_(2) reduction reaction(CO_(2)RR)to value-added ethylene(C2H4)holds significant promise for addressing energy and environmental challenges.While the high energy barriers for*CO intermediates hydrogenation and C–C coupling limit the C_(2)H_(4)generation.Herein,CuxP/g-C_(3)N_(4) heterojunction prepared by an in-situ phosphating technique,achieved collaborative photocatalytic CO_(2) and H2O,producing CO and C_(2)H_(4)as the main products.Notably,the selectivity of C_(2)H_(4)produced by CuxP/g-C_(3)N_(4) attained to 64.25%,which was 9.85 times that of CuxP(6.52%).Detailed time-resolution photoluminescence spectra,femtosecond transient absorption spectroscopy tests and density functional theory(DFT)calculation validate the ultra-fast interfacial electron transfer mechanism in CuxP/g-C_(3)N_(4) heterojunction.Successive*H on P sites caused by adsorbed H2O splitting with moderate hydrogenation ability enables the multi-step hydrogenation during CO_(2)RR process over CuxP/g-C_(3)N_(4).With the aid of mediated asymmetric Cu and P dual sites by g-C_(3)N_(4) nanosheet,the produced*CHO shows an energetically favorable for C–C coupling.The coupling formed*CHOCHO further accepts photoexcited efficient e–and*H to deeply produce C_(2)H_(4)according to the C^(2+)intermediates,which has been detected by in-situ diffuse reflectance infrared Fourier transform spectroscopy and interpreted by DFT calculation.The novel insight mechanism offers an essential understanding for the development of CuxP-based heterojunctions for photocatalytic CO_(2) to C^(2+)value-added fuels. 展开更多
关键词 Photocatalytic CO_(2) reduction c-c coupling Ethylene Cu_(x)P/g-C_(3)N_(4)heterojunction
在线阅读 下载PDF
Visible-light-induced ring-opening cross-coupling of cycloalcohols with vinylazaarenes and enones viaβ-C-C scission enabled by proton-coupled electron transfer
12
作者 Qinghong Zhang Qiao Zhao +7 位作者 Xiaodi Wu Li Wang Kairui Shen Yuchen Hua Cheng Gao Yu Zhang Mei Peng Kai Zhao 《Chinese Chemical Letters》 2025年第2期372-377,共6页
Pyridyl-based ketones and 1,6-diketones are both attractive and invaluable scaffolds which play pivotal roles in the construction and structural modification of a plethora of synthetically paramount natural products,p... Pyridyl-based ketones and 1,6-diketones are both attractive and invaluable scaffolds which play pivotal roles in the construction and structural modification of a plethora of synthetically paramount natural products,pharmaceuticals,organic materials and fine chemicals.In this context,we herein demonstrate an unprecedented,robust and generally applicable synthetically strategy to deliver these two crucial ketone frameworks via visible-light-induced ring-opening coupling reactions of cycloalcohols with vinylazaarenes and enones,respectively.A plausible mechanism involves the selectiveβ-C-C bond cleavage of cycloalcohols enabled by proton-coupled electron transfer and ensuing Giese-type addition followed by single electron reduction and protonation.The synthetic methodology exhibits broad substrate scope,excellent functional group compatibility as well as operational simplicity and environmental friendliness. 展开更多
关键词 Pyridyl-based ketone 1 6-Diketone Proton-coupled electron transfer c-c Bond cleavage Ring-opening coupling
原文传递
Insight into the morphology-dependent CeO_(2)for oxidation of lignin model compounds via C-C bond cleavage
13
作者 Yu-Guo Dong Wen-Jing Kong +6 位作者 Zhuang Ma Yong Yang Ping Wang Shi-Xiong Sheng Lin Dong Xiao-Li Gu Zu-Peng Chen 《Rare Metals》 2025年第7期4767-4778,共12页
The oxidation of lignin model compounds to esters via C-C bond cleavage has attracted considerable attention,as esters could be used as important polymer precursors and pharmaceutical intermediates.However,most studie... The oxidation of lignin model compounds to esters via C-C bond cleavage has attracted considerable attention,as esters could be used as important polymer precursors and pharmaceutical intermediates.However,most studies focus on designing homogeneous or noble metal catalysts and conducting the reactions under basic conditions.Here,we report an efficient process for the C-C bond cleavage of lignin model compounds and selectively producing esters over different shaped CeO_(2)(i.e.,nanospheres(S),nanorods(R),nanoparticles(P),and nanocubes(C))under base-free conditions.Specifically,the yield of methyl anisate from the aerobic oxidation of l-(4-methoxyphenyl)ethanol reaches 77.6%over CeO_(2)-S in one hour(91%in 9 h),exhibiting higher performance compared to other evaluated CeO_(2)catalysts(6.4%-40.2%).Extensivecharacterizations and experimental investigations reveal that the density of weak base sites and oxygen vacancies on the CeO_(2)surface is positively correlated with the yield of methyl esters.Furthermore,the reaction pathway is investigated,which confirms that 1-(4-methoxyphenyl)ethanol first undergoes two reactions(i.e.,etherification and dehydrogenation)to produce intermediates of1-methoxy-4-(1-methoxy-ethyl)-benzene and 1-(4-methoxyphenyl)ethanone,respectively,followed by a series of functional group transformations to generate the targeted methyl anisate ultimately. 展开更多
关键词 Catalytic oxidation c-c bond cleavage Lignin model compounds CERIA
原文传递
Engineered metal-atom aggregates enable selective ethylene glycol production through photocatalytic methanol C-C coupling
14
作者 Yixin Song Yongli Shen +2 位作者 Wen Zhang Lina Li Changhua An 《Nano Research》 2025年第11期210-219,共10页
Photo-reforming methanol into valuable chemicals represents an energetically sustainable alternative to conventional thermal catalysis,yet controlling-specific C-C coupling way still remains elusive.In this work,we re... Photo-reforming methanol into valuable chemicals represents an energetically sustainable alternative to conventional thermal catalysis,yet controlling-specific C-C coupling way still remains elusive.In this work,we report a sulfide-based photocatalytic paradigm,where atomic-level control of nickel species directly dictates reaction selectivity.The electrostatic constructing ZnIn_(2)S_(4)/Zn_(0.5)Cd_(0.5)S(ZIS/ZCS)heterostructures enable single atom Ni to facilitate ethylene glycol(EG)production with a rate of 11.2 mmol·gcat^(−1)·h^(−1),surpassing reported non-precious metal systems,whereas the Ni aggregates drive exclusive formaldehyde formation.The operando spectroscopy and density functional theory reveal dual roles of Ni as electron reservoir and chemical bond breakage inducers,lowering C-H activation barriers while stabilizing·CH2OH intermediates for cross-coupling.This interfacial configuration engineering creates an electron highway that couples carrier dissociation with radical recombination kinetics,achieving atom-economic steering of methanol oxidative valorization.The metal dispersion assisting catalysis correlation here provides a design blueprint for selective bond scission and reconstruction in sustainable organic synthesis. 展开更多
关键词 PHOTOCATALYSIS methanol reforming c-c coupling
原文传递
Unlocking asymmetric C-C coupling pathways on commercial Cu catalysts via Cu (100) grain boundaries for efficient and durable CO electroreduction
15
作者 Xianlong Lu Lili Wang +6 位作者 Xueyang Zhao Binbin Pan Zhendong Li Xiangfei Du Shihan Zhang Fan Dong Bangwei Deng 《Chinese Journal of Catalysis》 2025年第9期198-209,共12页
Copper(Cu)-based catalysts show significant potential for producing high value-added C_(2+)products in electrocatalytic CO_(2)/CO reduction reactions(CO(2)RR).However,the structural reconfiguration during operation po... Copper(Cu)-based catalysts show significant potential for producing high value-added C_(2+)products in electrocatalytic CO_(2)/CO reduction reactions(CO(2)RR).However,the structural reconfiguration during operation poses substantial challenges in identifying the intrinsic catalytic active site,especially under similar mass transport conditions.Herein,three typical and commercial Cu-based catalysts(Cu,CuO,and Cu_(2)O)are chosen as representatives to elucidate the structure-activity relationship of CORR in the membrane electrode assembly electrolyzer.Notably,only the Cu catalyst demonstrates the most suppression of hydrogen evolution reaction,thus achieving the highest FE of 86.7% for C_(2+)products at a current density of 500 mA cm^(-2) and maintaining a stable electrolysis over 110 h at a current of 200 mA cm^(-2).The influence of chemical valence state of Cu,electrochemical surface area,and local pH were firstly investigated and ruled out for the significant FE differences.Finally,based on the structure analysis from high resolution transmission electron microscope,OH-adsorption,in situ infrared spectroscopy and density functional theory calculations,it is suggested that the asymmetric C-C coupling(via ^(*)CHO and ^(*)CO)is the most probable reaction pathway for forming C_(2+)products,with Cu(100)-dominant grain boundaries(GBs)being the most favorable active sites.These findings provide deeper insights into the synergistic relationship between crystal facets and GBs in electrocatalytic systems. 展开更多
关键词 CO electroreduction Asymmetric c-c coupling Grain boundaries Cu-based catalyst C_(2+)product
在线阅读 下载PDF
Breaking the C-C coupling barrier:Surface tailoring for efficient CO_(2)-to C_(2+)electrocatalysis
16
作者 Wasihun A.Hika Asfaw G.Yohannes +5 位作者 Yingjie Guo Lei Shi Xinshuo Shi Shilong Li Ian Gates Shenlong Zhao 《Journal of Energy Chemistry》 2025年第7期1002-1025,共24页
Research interest in the electrochemical reduction reaction of carbon dioxide(CO_(2)RR)into multicarbon(C_(2+))compounds has been growing significantly with numerous theoretical and experimental studies employing a va... Research interest in the electrochemical reduction reaction of carbon dioxide(CO_(2)RR)into multicarbon(C_(2+))compounds has been growing significantly with numerous theoretical and experimental studies employing a variety of surface modification techniques,such as strong support interactions,heteroatom doping,surface functionalization,and morphology and defect engineering.The collective goal of these strategies is to fine-tune the electrochemical properties of catalysts,thereby breaking the C-C coupling barrier to achieve efficient and selective formation of C_(2+)products.In this review,we critically examine these research efforts,with a particular focus on achieving a comprehensive understanding of the innovative catalyst surface that dictates pathways for electrochemical CO_(2)RR to C_(2+)compounds.We begin by discussing the essential characteristics of catalyst surfaces that demonstrate superior catalytic activity and selectivity.Next,we explore the range of strategies used to create conducive catalyst surfaces.Finally,we provide an overview of catalytic performance and selectivity of materials in synthesizing C_(2+)products based on some high-throughput density functional theory and machine learning screening techniques. 展开更多
关键词 CO_(2)electroreduction c-c coupling Catalyst surface C_(2+)selectivity Multicarbon products
在线阅读 下载PDF
新医科背景下教学模式在课程创新改革中的探索——C-C-P教学模式在“营养与食品卫生学”课程改革中的探索和应用
17
作者 冯月梅 王松梅 徐芳 《教育教学论坛》 2025年第32期136-140,共5页
针对我国高等教育的现状和实现健康中国的需求,教育部提出了新医科建设理念,旨在培养高层次医学创新型复合人才。“营养与食品卫生学”是昆明医科大学预防医学专业学生重要的必修专业核心课程,为契合新医科建设理念,该课程的教学创新改... 针对我国高等教育的现状和实现健康中国的需求,教育部提出了新医科建设理念,旨在培养高层次医学创新型复合人才。“营养与食品卫生学”是昆明医科大学预防医学专业学生重要的必修专业核心课程,为契合新医科建设理念,该课程的教学创新改革势在必行。以往的教学存在以下两方面的痛点:一是“教”与“学”脱节,教师在课堂上唱“独角戏”;二是理论与实践脱节,学生缺乏解决复杂问题的能力。针对以上问题,课程契合OBE教育理念,以学生成长为中心,构建了C-C-P教学模式,从教学组织、教学设计、教学手段等主要方面进行了一系列的创新改革,以期为提高教学质量以及培养公共卫生领域应用型人才奠定基础。 展开更多
关键词 新医科 营养与食品卫生学 c-c-P教学模式 教学创新改革
在线阅读 下载PDF
前列腺癌相关成纤维细胞通过分泌趋化因子C-C基元配体15促进单核细胞迁移 被引量:1
18
作者 邵毅 宋圣举 +1 位作者 韩瑞发 尚芝群 《中国中西医结合外科杂志》 CAS 2024年第5期633-636,共4页
目的:探究前列腺癌微环境中趋化因子C-C基元配体15(CCL15)的表达、来源以及对单核细胞迁移能力的影响。方法:对正常前列腺组织和前列腺癌组织进行CCL15免疫荧光染色,使用免疫组化和免疫荧光双染实验探究CCL15的主要来源细胞。从新鲜的... 目的:探究前列腺癌微环境中趋化因子C-C基元配体15(CCL15)的表达、来源以及对单核细胞迁移能力的影响。方法:对正常前列腺组织和前列腺癌组织进行CCL15免疫荧光染色,使用免疫组化和免疫荧光双染实验探究CCL15的主要来源细胞。从新鲜的正常前列腺组织和前列腺癌组织中分离成纤维细胞并进行原代培养,通过实时定量PCR、免疫印迹实验和ELISA实验检测成纤维细胞中α-平滑肌肌动蛋白(α-SMA)、成纤维细胞活化蛋白(FAP)、波形蛋白(Vimentin)和CCL15的表达情况。利用慢病毒转染敲低CCL15,探究敲低CCL15后成纤维细胞条件培养基对单核细胞迁移能力的影响。进行多色免疫荧光染色检测前列腺癌组织中CCL15与M2巨噬细胞的位置关系。结果:前列腺癌组织中CCL15的表达明显高于正常组织,且主要来源于表达α-SMA的成纤维细胞。与前列腺正常成纤维细胞(NF)相比,前列腺癌相关成纤维细胞(CAF)分泌CCL15的能力显著增强。敲低CCL15后,前列腺CAF分泌的CCL15明显减少,减弱了单核细胞的迁移能力。在前列腺癌组织中,CCL15高表达区域存在更多M2巨噬细胞。结论:前列腺CAF通过分泌CCL15促进单核细胞迁移,增加前列腺癌微环境中M2巨噬细胞的浸润。 展开更多
关键词 前列腺癌 成纤维细胞 单核细胞 免疫微环境 趋化因子c-c基元配体15
暂未订购
乌头碱调节C-C基序趋化因子配体2/C-C基序趋化因子受体2信号通路对膀胱癌细胞抗肿瘤活性及其作用机制研究 被引量:2
19
作者 任慧云 冯一伟 许培英 《安徽医药》 CAS 2024年第4期660-665,I0001,共7页
目的 探讨乌头碱调节C-C基序趋化因子配体2(CCL2)/C-C基序趋化因子受体2(CCR2)信号通路对膀胱癌细胞抗肿瘤活性及其作用机制研究。方法 研究起止时间为2021年12月至2022年10月。采用细胞计数试剂盒(CCK-8)法检测2.5、5.0、10.0、20.0、3... 目的 探讨乌头碱调节C-C基序趋化因子配体2(CCL2)/C-C基序趋化因子受体2(CCR2)信号通路对膀胱癌细胞抗肿瘤活性及其作用机制研究。方法 研究起止时间为2021年12月至2022年10月。采用细胞计数试剂盒(CCK-8)法检测2.5、5.0、10.0、20.0、30.0μmol/L乌头碱处理后的人膀胱癌5637细胞存活率,筛选出合适的乌头碱作用浓度。将5637细胞分为对照组、乌头碱低剂量(10μmol/L)组、乌头碱高剂量(20μmol/L)组、乌头碱高剂量(20μmol/L)+空载组、乌头碱高剂量(20μmol/L)+CCL2过表达组,分组处理后,采用CCK-8法、5-乙炔基-2’-脱氧尿苷(Edu)染色法及Hoechst 33258染色分别检测各组5637细胞存活率、增殖率、凋亡率;采用Transwell实验及划痕实验分别检测各组5637细胞侵袭数、迁移率;采用免疫荧光染色检测各组5637细胞凋亡相关蛋白BCL2相关X蛋白(Bax)和B淋巴细胞瘤-2(Bcl-2)表达比值(Bax/Bcl-2);采用免疫印迹法检测各组5637细胞CCL2/CCR2信号通路相关蛋白及上皮间质转化标志蛋白[神经钙黏素(N-cadherin)、锌指E盒结合同源盒1(ZEB1)、紧密连接蛋白1(ZO-1)、上皮钙黏素(E-cadherin)]表达。结果 与对照组相比,乌头碱低剂量组、乌头碱高剂量组、乌头碱高剂量+空载组细胞CCL2(0.69±0.09、0.20±0.03、0.19±0.04比1.21±0.13),CCR2(0.78±0.12、0.26±0.06、0.27±0.07比1.33±0.20)、Ncadherin(0.65±0.06、0.12±0.02、0.11±0.03比1.24±0.12)与ZEB1蛋白表达、存活率、增殖率、侵袭数、迁移率均降低(P<0.05),Bax/Bcl-2、细胞ZO-1与E-cadherin蛋白表达均升高(P<0.05);乌头碱高剂量组、乌头碱高剂量+空载组细胞CCL2、CCR2、N-cadherin与ZEB1蛋白表达、存活率、增殖率、侵袭数、迁移率相比乌头碱低剂量组进一步降低(P<0.05),Bax/Bcl-2、细胞ZO-1与Ecadherin蛋白表达进一步升高(P<0.05)。与乌头碱高剂量组相比,乌头碱高剂量+CCL2过表达组细胞CCL2、CCR2、N-cadherin与ZEB1蛋白表达、存活率、增殖率、侵袭数、迁移率升高(P<0.05),Bax/Bcl-2、细胞ZO-1与E-cadherin蛋白表达降低(P<0.05)。结论 乌头碱可通过CCL2/CCR2信号通路而抑制膀胱癌细胞存活、增殖及侵袭和迁移,促使其凋亡。 展开更多
关键词 乌头碱 c-c基序趋化因子配体2/c-c基序趋化因子受体2 信号通路 膀胱癌 抗肿瘤
暂未订购
上一页 1 2 250 下一页 到第
使用帮助 返回顶部