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Intestinal glucagon-like peptide-1:A new player associated with impaired counterregulatory responses to hypoglycaemia in type 1 diabetic mice

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World Journal of Diabetes 2024年第8期15卷 1764-1777页

作者： Fang-Xin Jin Yan Wang Min-Ne Li Ru-Jiang Li jun-tang guo Department of Histology and Embryology Key Laboratory of Universities in Shandong ProvinceShandong Second Medical UniversityWeifang 261053Shandong ProvinceChina Department of Pathological Physiology Shandong Second Medical UniversityWeifang 261053Shandong ProvinceChina

BACKGROUND Impaired hypoglycaemic counterregulation has emerged as a critical concern for diabetic patients who may be hesitant to medically lower their blood glucose levels due to the fear of potential hypoglycaemic ***,the pathogenesis of hypoglycaemic counterregulation is still ***-like peptide-1(GLP-1)and its analogues have been used as adjunctive therapies for type 1 diabetes mellitus(T1DM).The role of GLP-1 in counterregulatory dysfunction during hypoglycaemia in patients with T1DM has not been *** To explore the impact of intestinal GLP-1 on impaired hypoglycaemic counterregulation in type 1 diabetic *** T1DM was induced in C57BL/6J mice using streptozotocin,followed by intraperitoneal insulin injections to create T1DM models with either a single episode of hypoglycaemia or recurrent episodes of hypoglycaemia(DH5).Immunofluorescence,Western blot,and enzyme-linked immunosorbent assay were employed to evaluate the influence of intestinal GLP-1 on the sympathetic-adrenal reflex and glucagon(GCG)*** GLP-1 receptor agonist GLP-1(7-36)or the antagonist exendin(9-39)were infused into the terminal ileum or injected intraperitoneally to further investigate the role of intestinal GLP-1 in hypoglycaemic counterregulation in the model *** The expression levels of intestinal GLP-1 and its receptor(GLP-1R)were significantly increased in DH5 *** instances of excess of intestinal GLP-1 weakens the sympathetic-adrenal reflex,leading to dysfunction of adrenal counterregulation during ***5 mice showed increased pancreaticδ-cell mass,cAMP levels inδcells,and plasma somatostatin concentrations,while cAMP levels in pancreaticαcells and plasma GCG levels ***,GLP-1R expression in islet cells and plasma active GLP-1 levels were significantly increased in the DH5 *** experiments involving terminal ileal infusion and intraperitoneal injection in the model mice demonstra

关键词： Glucagon-like peptide-1 Impaired hypoglycaemic counterregulation Type 1 diabetes Intestine Pancreas

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平面有限元网格生成的线段转换法

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计算机辅助设计与图形学学报 1998年第1期10卷 41-45页

作者：丁俊唐国安复旦大学应用力学系

用一种将矢量型四边形转换成有限单元的方法，可以将由ＣＡＤ软件绘制的、用线段或圆弧表示的二维矢量型图形转换成平面有限单元数据．适用于对单元拓扑结构或节点位置有特殊要求的有限元分析问题，具有处理三角形和四边形混合单元的能力．

关键词：有限元网格生成 CAD 线段转换法

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Synergistic effect of bonding heterogeneity and phonon localization in introducing excellent thermoelectric properties in layered heteroanionic NdZnSbO material

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Journal of Energy Chemistry 2025年第1期100卷 259-272页

作者： Da Wan Shuwei tang Shulin Bai Xiaodong Li Peng Ai Wanrong guo Tuo Zheng College of Materials Science and Engineering Liaoning Technical University Faculty of Chemistry Northeast Normal University

Layered rare-earth metal oxides, harnessing the dual properties of oxides and two-dimensional layered materials, exhibit remarkable thermal stability and quantum confinement effects. Therefore, this work adopts the first-principles calculation combined with the Boltzmann transport theory to predict the thermoelectric properties of NdZnSbO compound. The coexistence of weak interlayer van der Waals interactions, robust intralayer ionic bonding, and partial covalent bonding leads to remarkable bonding heterogeneity, which engenders pronounced phonon scattering and imposes constraints on thermal transport along the out-of-plane direction. The weakened chemical bonds induced by the antibonding states, together with the rattling-like behavior of the Zn atom, culminate in the profound anharmonicity in the layered NdZnSbO compound. The weakening bond and heavy element contribute to the softness of phonon modes, which significantly diminishes the phonon group velocity. The redistribution-dominated four-phonon scattering process spans a large optical gap, which effectively reduces the lattice thermal conductivity. The NdZnSbO compound exhibits direct semiconductor characteristic with a bandgap of 0.73 e V by adopting the Heyd-Scuseria-Ernzerhof(HSE06) functional in combination with spin–orbit coupling(SOC) effect. The multi-valley feature of NdZnSbO compound augur favorably for band degeneracy, thus amplifying the power factor. Consequently, an optimal figure-of-merit(ZT) of 3.40 at 900 K is achieved for the n-type NdZnSbO compound. The present study delves deeply insights into the origins for the low thermal conductivity of NdZnSbO compound and proposes an optimization scheme to enhance overall thermoelectric performance.

关键词： Bond strength (chemical)

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Ribozyme probe based on molecular beacon for real time monitoring of enzymatic cleavage process

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Chinese Science Bulletin 2003年第23期48卷 2581-2584页

作者： MENG Xiangxian, WANG Kemin, TAN Weihong, LI jun, tang Zhiwen, guo Qiuping, HUANG Shasheng & LI Du State Key Laboratory of Chemo/Biosensing and Chemometrics, Institute of Biological Technology, College of Chemistry and Chemical Engi-neering, Hunan University, Changsha 410082, China Correspondence should be addressed to Wang Kemin (e-mail: kmwang @***) State Key Laboratory of Chemo/Biosensing and Chemometrics Institute of Biological Technology College of Chemistry and Chemical Engineering Human University

Ribozyme probe based on molecular beacon (MBR) for monitoring enzymatic cleavage process in real time is designed and studied. The approach relies on ri-bozyme substrates modified at the two arms, with a fluores-cent moiety attached to the end of one arm and a non-fluorescent quenching moiety attached to the end of the other arm. MBR is employed to directly convert the cleavage information into fluorescence signal in real time. Compared with traditional approach, this method provides a no-radiolabeling, sensitive and effective way to research on the ribozyme activity, enzymatic dynamic process and ri-bozyme function during gene therapy. The activity of the ribozyme against hepatitis C virus RNA (HCV-RNA) is stud-ied based on this assay.

关键词：酶探测器分裂过程动力学酶活性基因治疗肝炎

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The potential mechanism and clinical application value of remote ischemic conditioning in stroke

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Neural Regeneration Research 2025年第6期20卷 1613-1627页

作者： Yajun Zhu Xiaoguo Li Xingwei Lei Liuyang tang Daochen Wen Bo Zeng Xiaofeng Zhang Zichao Huang Zongduo guo The First Affiliated Hospital of Chongqing Medical University ChongqingChina

Some studies have confirmed the neuroprotective effect of remote ischemic conditioning against stroke. Although numerous animal researches have shown that the neuroprotective effect of remote ischemic conditioning may be related to neuroinflammation, cellular immunity, apoptosis, and autophagy, the exact underlying molecular mechanisms are unclear. This review summarizes the current status of different types of remote ischemic conditioning methods in animal and clinical studies and analyzes their commonalities and differences in neuroprotective mechanisms and signaling pathways. Remote ischemic conditioning has emerged as a potential therapeutic approach for improving stroke-induced brain injury owing to its simplicity, non-invasiveness, safety, and patient tolerability. Different forms of remote ischemic conditioning exhibit distinct intervention patterns, timing, and application range. Mechanistically, remote ischemic conditioning can exert neuroprotective effects by activating the Notch1/phosphatidylinositol 3-kinase/Akt signaling pathway, improving cerebral perfusion, suppressing neuroinflammation, inhibiting cell apoptosis, activating autophagy, and promoting neural regeneration. While remote ischemic conditioning has shown potential in improving stroke outcomes, its full clinical translation has not yet been achieved.

关键词： Akt apoptosis autophagy cerebral perfusion cerebral vascular stenosis clinical transformation hemorrhagic stroke ischemic stroke neuroinflammation neuroprotection Notch1 PI3K remote ischemic conditioning stroke

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Hypoxia-preconditioned bone marrow-derived mesenchymal stem cells protect neurons from cardiac arrest-induced pyroptosis

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Neural Regeneration Research 2025年第4期20卷 1103-1123页

作者： Xiahong tang Nan Zheng Qingming Lin Yan You Zheng Gong Yangping Zhuang Jiali Wu Yu Wang Hanlin Huang jun Ke Feng Chen Shengli Clinical Medical College of Fujian Medical University Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Emergency Fujian Provincial HospitalFuzhouFujian ProvinceChina Fujian Provincial Key Laboratory of Emergency Medicine FuzhouFujian ProvinceChina The Second Department of Intensive Care Unit Fujian Provincial Hospital South BranchFuzhouFujian ProvinceChina

Cardiac arrest can lead to severe neurological impairment as a result of inflammation,mitochondrial dysfunction,and post-cardiopulmonary resuscitation neurological *** preconditioning has been shown to improve migration and survival of bone marrow–derived mesenchymal stem cells and reduce pyroptosis after cardiac arrest,but the specific mechanisms by which hypoxia-preconditioned bone marrow–derived mesenchymal stem cells protect against brain injury after cardiac arrest are *** this end,we established an in vitro co-culture model of bone marrow–derived mesenchymal stem cells and oxygen–glucose deprived primary neurons and found that hypoxic preconditioning enhanced the protective effect of bone marrow stromal stem cells against neuronal pyroptosis,possibly through inhibition of the MAPK and nuclear factor κB ***,we transplanted hypoxia-preconditioned bone marrow–derived mesenchymal stem cells into the lateral ventricle after the return of spontaneous circulation in an 8-minute cardiac arrest rat model induced by *** results showed that hypoxia-preconditioned bone marrow–derived mesenchymal stem cells significantly reduced cardiac arrest–induced neuronal pyroptosis,oxidative stress,and mitochondrial damage,whereas knockdown of the liver isoform of phosphofructokinase in bone marrow–derived mesenchymal stem cells inhibited these *** conclude,hypoxia-preconditioned bone marrow–derived mesenchymal stem cells offer a promising therapeutic approach for neuronal injury following cardiac arrest,and their beneficial effects are potentially associated with increased expression of the liver isoform of phosphofructokinase following hypoxic preconditioning.

关键词： bone marrow–derived mesenchymal stem cells cardiac arrest cardiac resuscitation hypoxic preconditioning liver isoform of phosphofructokinase mitochondria neuroinflammation oxidative stress pyroptosis reactive oxygen species

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Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第01期 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-Cheng tang Ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu tang Chun-Mao Yuan jun-Bo Yang Zhi-Li Zuo Han guo Zi-Fei Xu Ying Zeng Yun-Dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

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雄性SD大鼠高脂高糖饮食对子代新生鼠胰岛素受体基因甲基化的影响

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中华内分泌代谢杂志 2016年第12期32卷 1010-1014页

作者：曹银利高俊唐成和郭洪旭新乡医学院第一附属医院新生儿科 453100

目的探讨雄性SD大鼠高脂高糖饮食对子代新生鼠肌肉、脑及肝组织胰岛素受体（INSR）基因表达及甲基化的影响。方法取5周龄雄性SD大鼠随机分为：正常饮食组及高脂高糖饮食组，分组饲养3个月后与正常雌鼠交配。比较F1代7日龄雄性仔鼠体重... 详细信息

目的探讨雄性SD大鼠高脂高糖饮食对子代新生鼠肌肉、脑及肝组织胰岛素受体（INSR）基因表达及甲基化的影响。方法取5周龄雄性SD大鼠随机分为：正常饮食组及高脂高糖饮食组，分组饲养3个月后与正常雌鼠交配。比较F1代7日龄雄性仔鼠体重、血糖及血胰岛素水平。分别提取仔鼠肌肉、脑及肝组织中INSR基因DNA、总RNA及总蛋白，实时荧光定量PCR检测INSR基因mRNA水平的相对表达量；Western印迹评价INSR蛋白表达水平；甲基化特异性PCR（MSP）测定INSR基因启动子区甲基化水平。结果2组F1代仔鼠体重差异无统计学意义；高脂高糖饮食组仔鼠出现明显的葡萄糖耐受及胰岛素耐受降低的现象；实时荧光定量PCR及Western印迹提示高脂高糖饮食组仔鼠肌肉及肝脏组织中INSR基因mRNA及蛋白水平的相对表达量显著低于正常饮食组，而脑组织中INSR表达无显著差异；MSP结果提示高脂高糖饮食组仔鼠肝脏及肌肉组织中INSR基因甲基化水平显著高于正常饮食组，脑组织中INSR基因甲基化无明显差异。结论雄性大鼠高脂高糖饮食会导致F1代仔鼠产生葡萄糖耐受和胰岛素耐受下降以及肝脏和肌肉组织中INSR基因表达抑制。该现象可能与父代高脂高糖饮食促进子代仔鼠肝脏及肌肉组织中INSR基因甲基化修饰有关。

关键词：甲基化胰岛素受体基因 F1代高脂高糖饮食雄性 SD大鼠

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颈椎后前向松动术和牵引后颈椎后前向松动术对椎动脉血流量的影响

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中华物理医学与康复杂志 2016年第10期38卷 768-771页

作者：陈勇夏俊文汤智伟郭铁成洪恺华中科技大学同济医学院附属同济医院康复医学科武汉430030 华中科技大学同济医学院附属同济医院超声影像科武汉430030

目的研究单纯的后前向松动（单纯松动术）和持续牵引的同时行后前向关节松动（牵引松动术）对椎动脉血流量的影响。方法选取健康受试者30例。所有受试者均接受单纯松动术和牵引松动术干预，2种干预方案的顺序随机，每种干预间歇2d。于... 详细信息

目的研究单纯的后前向松动（单纯松动术）和持续牵引的同时行后前向关节松动（牵引松动术）对椎动脉血流量的影响。方法选取健康受试者30例。所有受试者均接受单纯松动术和牵引松动术干预，2种干预方案的顺序随机，每种干预间歇2d。于每次干预前、后采用彩色超声多普勒诊断仪采集椎动脉的血流动力学参数。结果单纯松动术干预后，受试者的收缩峰值血流速度[（46．32±4．98）cm／s]、舒张末期血流速度[（17．47±3．39）cm／s]、平均血流速度[（27．12±9．01）cm／s]、阻力指数[（0．70±0．06）]分别与治疗前比较，差异无统计学意义（P〉0．05）。牵引松动术干预后，受试者的收缩峰值血流速度[（45．98±5．10）cm／s]、舒张末期血流速度[（18．01±4．27）cm／s]、平均血流速度[（26．09±6．89）cm／s]、阻力指数[（0．70±0．09）]分别与治疗前比较，差异均无统计学意义（P〉O．05）。结论颈椎后前向松动和牵引松动产生的椎间运动对椎动脉血流量无影响。

关键词：后前向松动手法牵引松动椎动脉血流量

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Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Ductility

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