Traditional Chinese medicine(TCM)has a comprehensive and thorough understanding of biological rhythm.Biological rhythm is an inherent connotation of“harmony between human and nature”,one of the thoughts in TCM.TCM d...Traditional Chinese medicine(TCM)has a comprehensive and thorough understanding of biological rhythm.Biological rhythm is an inherent connotation of“harmony between human and nature”,one of the thoughts in TCM.TCM discusses emphatically circadian rhythm,syzygial rhythm and seasonal rhythm,and particularly circadian and seasonal rhythms.Theories of Yin Yang and Five Elements are the principles and methods,with which TCM understands biological rhythms.Based on theories in TCM,biological rhythm in essence is a continuous variation of the human body state synchronized with natural rhythms,and theories of Yin Yang and Five Elements are both language tools to describe this continuous variation and theoretical tools for its investigation and application.The understandings of biological rhythm in TCM can be applied to etiology,health care,disease control and treatment.Many understandings in TCM have been confirmed by modern research and clinical reports,but there are still some pending issues.TCM is distinguished for its holistic viewpoint on biological rhythms.展开更多
The rodent running-wheel recording apparatus is a reliable approach for studying cir-cadian rhythm.This study demonstrated how to construct a simple and intelligent running-wheel recording system.The running wheel was...The rodent running-wheel recording apparatus is a reliable approach for studying cir-cadian rhythm.This study demonstrated how to construct a simple and intelligent running-wheel recording system.The running wheel was attached to the cage's base,whereas the Hall sensor was attached to the cage's cover.Then,the RJ25 adaptor relayed the running signal to the main control board.Finally,the main control board was connected to the USB port of the computer with the USB connection.Data were collected using the online-accessible,self-created software Magturning.Through Magturning,generated data were saved and exported in real time.Afterward,the device was validated by collecting data on the locomotor activities of mice under dif-ferent light conditions.In conclusion,this new device can record circadian activity of rodents.Our device is appropriate for interdisciplinary investigations related to biological clock research.展开更多
瘙痒是皮肤病最典型和最重要的临床症状之一,也是皮肤病加重或复发的重要诱因之一。瘙痒严重影响患者的身心健康和生活质量,给患者、家庭和社会带来沉重的负担。瘙痒的发生和调控机制复杂,目前尚未阐明。临床研究显示在疥疮、慢性瘙痒...瘙痒是皮肤病最典型和最重要的临床症状之一,也是皮肤病加重或复发的重要诱因之一。瘙痒严重影响患者的身心健康和生活质量,给患者、家庭和社会带来沉重的负担。瘙痒的发生和调控机制复杂,目前尚未阐明。临床研究显示在疥疮、慢性瘙痒、特应性皮炎和银屑病中均存在瘙痒夜间加重的情况,提示皮肤瘙痒可呈昼夜节律性改变。皮质醇、褪黑素、人体核心温度、细胞因子及前列腺素等因素是瘙痒昼夜节律的主要调控因素。一些生物钟基因如BMAL1、CLOCK、PER和CRY等,通过调节Janus激酶(Janus tyrosine kinase,JAK)-信号转导和转录激活因子(signal transducer and activator of transcription,STAT)通路与转录因子蛋白家族核因子κB(nuclear factor kappa-B,NF-κB)等信号通路,在瘙痒的昼夜节律的调节中扮演重要角色。然而生物钟基因对瘙痒昼夜节律调控的具体作用机制尚未完全阐明,进一步研究生物钟基因在瘙痒昼夜节律调控中的作用机制,将为阐明瘙痒的调控机制奠定基础,亦可为控制瘙痒和缓解皮肤病提供新的思路。展开更多
Hyperpolarization-activated cyclic-nucleotide-gated (HCN) channels in the heart modulate cardiac automaticity via the hyperpolarization-activated cation current ( named Ⅰf, Ⅰh, or Ⅰq). Recent studies have unveiled ...Hyperpolarization-activated cyclic-nucleotide-gated (HCN) channels in the heart modulate cardiac automaticity via the hyperpolarization-activated cation current ( named Ⅰf, Ⅰh, or Ⅰq). Recent studies have unveiled the molecular identity of HCN (HCN1-4) channels. HCN isoforms are unevenly expressed in the heart, even in the sinoatrial node. Features of HCN currents have been characterized in cardiac and other types of cells or in cell lines transfected with the HCN isoforms. The factors modulating Ih and the physiological significance of HCN channels in the heart have been extensively investigated in recent years. The hypothesis for transplanting and/or creating biological pacemakers to replace diseased sinoatrial and/or atrioventricular nodes has been postulated and tested in animal models. Local overexpression of HCN2 channels in the left atrium or in the left conductive bundle branch of the left ventricle via gene delivery induced significant Ⅰh and escape rhythms during vagal stimulation in canines. In addition, implantation of human mesenchymal stem cells with overexpression of HCN2 channels to the canine left ventricular wall was associated with formation of spontaneous escape rhythms of left-sided origin during vagal-stimulation-induced sinus arrest. This preliminary data suggest that the use of HCN channels may hold great promise in,the development of biological pacemakers.展开更多
Abstract Hyperpolarization-activated cyclic-nucleotide-gated ( HCN) channels in the heart modulate cardiac automaticity via the hyperpolarization-activated cation current (named If, Ih, or Iq). Recent studies have unv...Abstract Hyperpolarization-activated cyclic-nucleotide-gated ( HCN) channels in the heart modulate cardiac automaticity via the hyperpolarization-activated cation current (named If, Ih, or Iq). Recent studies have unveiled the molecular identity of HCN (HCN 1-4) channels. HCN isoforms are unevenly expressed in the heart, even in the sinoatrial node. Features of HCN currents have been characterized in cardiac and other types of cells or in cell lines transfected with the HCN isoforms. The factors modulating Ih and the physiological significance of HCN channels in the heart have been extensively investigated in recent years. The hypothesis for transplanting and/or creating biological pacemakers to replace diseased sinoatrial and/or atrioventricular nodes has been postulated and tested in animal models. Local overexpression of HCN2 channels in the left atrium or in the left conductive bundle branch of the left ventricle via gene delivery induced significant Ih and escape rhythms during vagal stimulation in canines. In addition, implantation of human mesenchymal stem cells with overexpression of HCN2 channels to the canine left ventricular wall was associated with formation of spontaneous escape rhythms of left-sided origin during vagal-stimulation-induced sinus arrest. This preliminary data suggest that the use of HCN channels may hold great promise in the development of biological pacemakers.展开更多
A square wave voltammetry (DPV) method for trans-Pt[Cl2(Dimethylamine)(isopropylamine)] determination is developed. To this end, all the chemical and instrumental variables affecting the determination of trans-Pt[Cl2(...A square wave voltammetry (DPV) method for trans-Pt[Cl2(Dimethylamine)(isopropylamine)] determination is developed. To this end, all the chemical and instrumental variables affecting the determination of trans-Pt[Cl2(Dimethylamine) (isopropylamine)] are optimized. From studies of the mechanisms governing the electrochemical response of trans-Pt[Cl2(Dimethylamine)(isopropylamine)], it was concluded that it was an electrochemically reversible system with an adsorptive oxidation phenomenon. Under optimal conditions, the variation of analytical signal (Ip) with trans-Pt[Cl2(Dimethylamine)(isopropylamine)] concentration was linear in the 0.05 μg·mL-1 to 10 μg·mL-1 range, with a LOD 91 μg·mL-1 of and a LOQ of 303 μg·mL-1, a RSD 1.10% and Er 0.72%. The optimized method was applied to the determination of trans-Pt[Cl2(Dimethylamine)(isopropylamine)] in biological fluids, in human urine and synthetic urine.展开更多
基金This work is supported by a grant from National Science Foundation of China(No.81574098).
文摘Traditional Chinese medicine(TCM)has a comprehensive and thorough understanding of biological rhythm.Biological rhythm is an inherent connotation of“harmony between human and nature”,one of the thoughts in TCM.TCM discusses emphatically circadian rhythm,syzygial rhythm and seasonal rhythm,and particularly circadian and seasonal rhythms.Theories of Yin Yang and Five Elements are the principles and methods,with which TCM understands biological rhythms.Based on theories in TCM,biological rhythm in essence is a continuous variation of the human body state synchronized with natural rhythms,and theories of Yin Yang and Five Elements are both language tools to describe this continuous variation and theoretical tools for its investigation and application.The understandings of biological rhythm in TCM can be applied to etiology,health care,disease control and treatment.Many understandings in TCM have been confirmed by modern research and clinical reports,but there are still some pending issues.TCM is distinguished for its holistic viewpoint on biological rhythms.
基金Startup Fund for scientific research,Fujian Medical University,Grant/Award Number:2020QH1039Joint Funds for the Innovation of Science and Technology,Fujian Province,Grant/Award Number:2020Y9114 and 2020Y9119。
文摘The rodent running-wheel recording apparatus is a reliable approach for studying cir-cadian rhythm.This study demonstrated how to construct a simple and intelligent running-wheel recording system.The running wheel was attached to the cage's base,whereas the Hall sensor was attached to the cage's cover.Then,the RJ25 adaptor relayed the running signal to the main control board.Finally,the main control board was connected to the USB port of the computer with the USB connection.Data were collected using the online-accessible,self-created software Magturning.Through Magturning,generated data were saved and exported in real time.Afterward,the device was validated by collecting data on the locomotor activities of mice under dif-ferent light conditions.In conclusion,this new device can record circadian activity of rodents.Our device is appropriate for interdisciplinary investigations related to biological clock research.
文摘瘙痒是皮肤病最典型和最重要的临床症状之一,也是皮肤病加重或复发的重要诱因之一。瘙痒严重影响患者的身心健康和生活质量,给患者、家庭和社会带来沉重的负担。瘙痒的发生和调控机制复杂,目前尚未阐明。临床研究显示在疥疮、慢性瘙痒、特应性皮炎和银屑病中均存在瘙痒夜间加重的情况,提示皮肤瘙痒可呈昼夜节律性改变。皮质醇、褪黑素、人体核心温度、细胞因子及前列腺素等因素是瘙痒昼夜节律的主要调控因素。一些生物钟基因如BMAL1、CLOCK、PER和CRY等,通过调节Janus激酶(Janus tyrosine kinase,JAK)-信号转导和转录激活因子(signal transducer and activator of transcription,STAT)通路与转录因子蛋白家族核因子κB(nuclear factor kappa-B,NF-κB)等信号通路,在瘙痒的昼夜节律的调节中扮演重要角色。然而生物钟基因对瘙痒昼夜节律调控的具体作用机制尚未完全阐明,进一步研究生物钟基因在瘙痒昼夜节律调控中的作用机制,将为阐明瘙痒的调控机制奠定基础,亦可为控制瘙痒和缓解皮肤病提供新的思路。
文摘Hyperpolarization-activated cyclic-nucleotide-gated (HCN) channels in the heart modulate cardiac automaticity via the hyperpolarization-activated cation current ( named Ⅰf, Ⅰh, or Ⅰq). Recent studies have unveiled the molecular identity of HCN (HCN1-4) channels. HCN isoforms are unevenly expressed in the heart, even in the sinoatrial node. Features of HCN currents have been characterized in cardiac and other types of cells or in cell lines transfected with the HCN isoforms. The factors modulating Ih and the physiological significance of HCN channels in the heart have been extensively investigated in recent years. The hypothesis for transplanting and/or creating biological pacemakers to replace diseased sinoatrial and/or atrioventricular nodes has been postulated and tested in animal models. Local overexpression of HCN2 channels in the left atrium or in the left conductive bundle branch of the left ventricle via gene delivery induced significant Ⅰh and escape rhythms during vagal stimulation in canines. In addition, implantation of human mesenchymal stem cells with overexpression of HCN2 channels to the canine left ventricular wall was associated with formation of spontaneous escape rhythms of left-sided origin during vagal-stimulation-induced sinus arrest. This preliminary data suggest that the use of HCN channels may hold great promise in,the development of biological pacemakers.
文摘Abstract Hyperpolarization-activated cyclic-nucleotide-gated ( HCN) channels in the heart modulate cardiac automaticity via the hyperpolarization-activated cation current (named If, Ih, or Iq). Recent studies have unveiled the molecular identity of HCN (HCN 1-4) channels. HCN isoforms are unevenly expressed in the heart, even in the sinoatrial node. Features of HCN currents have been characterized in cardiac and other types of cells or in cell lines transfected with the HCN isoforms. The factors modulating Ih and the physiological significance of HCN channels in the heart have been extensively investigated in recent years. The hypothesis for transplanting and/or creating biological pacemakers to replace diseased sinoatrial and/or atrioventricular nodes has been postulated and tested in animal models. Local overexpression of HCN2 channels in the left atrium or in the left conductive bundle branch of the left ventricle via gene delivery induced significant Ih and escape rhythms during vagal stimulation in canines. In addition, implantation of human mesenchymal stem cells with overexpression of HCN2 channels to the canine left ventricular wall was associated with formation of spontaneous escape rhythms of left-sided origin during vagal-stimulation-induced sinus arrest. This preliminary data suggest that the use of HCN channels may hold great promise in the development of biological pacemakers.
文摘A square wave voltammetry (DPV) method for trans-Pt[Cl2(Dimethylamine)(isopropylamine)] determination is developed. To this end, all the chemical and instrumental variables affecting the determination of trans-Pt[Cl2(Dimethylamine) (isopropylamine)] are optimized. From studies of the mechanisms governing the electrochemical response of trans-Pt[Cl2(Dimethylamine)(isopropylamine)], it was concluded that it was an electrochemically reversible system with an adsorptive oxidation phenomenon. Under optimal conditions, the variation of analytical signal (Ip) with trans-Pt[Cl2(Dimethylamine)(isopropylamine)] concentration was linear in the 0.05 μg·mL-1 to 10 μg·mL-1 range, with a LOD 91 μg·mL-1 of and a LOQ of 303 μg·mL-1, a RSD 1.10% and Er 0.72%. The optimized method was applied to the determination of trans-Pt[Cl2(Dimethylamine)(isopropylamine)] in biological fluids, in human urine and synthetic urine.
