目的研究PC-SPESⅡ对雄激素非依赖性前列腺癌(AIPCa)基因表达的影响。方法雄性Balb/c-nu/nu裸小鼠20只,随机分为对照、PC-SPESⅡ组,每组10只,接种AIPCa细胞DU145建立动物模型。接种第2天起给药,8周后取肿瘤组织,应用human androgen sign...目的研究PC-SPESⅡ对雄激素非依赖性前列腺癌(AIPCa)基因表达的影响。方法雄性Balb/c-nu/nu裸小鼠20只,随机分为对照、PC-SPESⅡ组,每组10只,接种AIPCa细胞DU145建立动物模型。接种第2天起给药,8周后取肿瘤组织,应用human androgen signaling and prostate cancer gene array基因芯片,分析PC-SPESⅡ引起的基因表达变化。为验证基因芯片结果,选择应用RT-PCR方法检测IGF-1mRNA变化。结果30个基因表达下调,包括AIPCa凋亡耐受基因EIF4EBP和FOXj、AIPCa转化基因ADM和PCNA,AIPCa细胞表面标记物PSCA和FAS,以及侵袭性相关基因IGF-1、Met-1、B-myb等。11个基因表达上调,包括AIPCa细胞生长抑制基因PMEPA1和SFRP4,雄激素依赖性细胞表面标记物TMPPSS2、KLK3(PSA)、DD3和STEAP等。结论PC-SPESⅡ可能通过抑制AIPCa凋亡耐受机制、改善AIPCa表型,恢复雄激素依赖性、降低转移能力等多种途径发挥抗AIPCa作用。展开更多
Solid polymer electrolytes(SPEs)are considered promising candidates for all-solid-state lithium metal batteries because of their easy preparation and good compatibility with lithium metal.However,their applications ar...Solid polymer electrolytes(SPEs)are considered promising candidates for all-solid-state lithium metal batteries because of their easy preparation and good compatibility with lithium metal.However,their applications are restricted by their low ionic conductivity and poor mechanical properties.In this study,a composite solid polymer electrolyte composed of poly(ethylene oxide)(PEO),poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP),plasticizer succinonitrile(SN),and polytetrafluoroethylene(PTFE)fibrous porous membranes was prepared.The PTFE fibrous membrane significantly enhanced the mechanical strength of the electrolyte as a supporting framework.SN reduced the crystalline regions of PEO and facilitated rapid lithium-ion transport.PVDF-HFP promoted lithium salt dissolution and improved the electrochemical stability of the electrolyte.Accordingly,the optimized PTFE/PEO/PVDF-HFP/SN polymer electrolyte exhibited a tensile strength of 3.31 MPa at 352%elongation and demonstrated an ionic conductivity of 7.6×10^(-4)S·cm^(-1)at 60℃.Lithium symmetric cells maintained stable cycling for over 2500 h at 0.15 m A·cm^(-2),and Li//Li Fe PO_(4) full cells showed a high capacity retention of 91.6%after 300 cycles at 0.5 C,with coulombic efficiency consistently exceeding 99.9%throughout cycling.展开更多
PC SPES是一种饮食补充剂，由一种北美植物(锯齿棕)和7种中草药(菊花、灵芝、甘草、菘蓝、三七、碎米桠和黄芩)的提取物组成。由于其显著的临床疗效和改善前列腺癌患者生活质量的作用，该剂作为晚期前列腺癌的替代疗法受到人们的普遍欢...PC SPES是一种饮食补充剂，由一种北美植物(锯齿棕)和7种中草药(菊花、灵芝、甘草、菘蓝、三七、碎米桠和黄芩)的提取物组成。由于其显著的临床疗效和改善前列腺癌患者生活质量的作用，该剂作为晚期前列腺癌的替代疗法受到人们的普遍欢迎。作者已证实PCSPES的抗血管生成活性是由碎米桠Rabdosia tubescens(Hemsl．)Hara产生的，现又以一新开发的以人皮肤微血管内皮细胞血管生成体外试验为导向，从该植物分得2个二萜类成分ponicidin(1)和oridonin(2)，研究了它们的抗血管生成活性。展开更多
Compared to currently commercialized lithium-ion batteries,which use flammable organic liquid electrolytes and low-energy-density graphite anodes,solid-state lithium-metal batteries(SSLMBs)offer enhanced energy densit...Compared to currently commercialized lithium-ion batteries,which use flammable organic liquid electrolytes and low-energy-density graphite anodes,solid-state lithium-metal batteries(SSLMBs)offer enhanced energy density and improved safety,making them promising alternatives for next-generation rechargeable batteries[1].As a crucial component of these batteries,solid-state electrolytes—divided into inorganic solid ceramic electrolytes(SCEs)and organic solid polymer electrolytes(SPEs)—are vital for lithium-ion transport and inhibiting lithium dendrite growth.Among them,SCEs exhibit high ionic conductivity,excellent mechanical properties,and outstanding electrochemical and thermal stability.Nevertheless,their brittleness,interfacial challenges with electrodes,and the requirement for high stacking pressure during battery operation significantly hinder their scalable application.In comparison,SPEs are more favourable for manufacturing due to their flexibility and good interfacial compatibility with electrodes[2].Despite these advantages,SPEs still face significant challenges in achieving practical application.Firstly,typical SPEs,such as poly(ethylene oxide)(PEO),poly(vinylidene fluoride)(PVDF),and poly(ethylene glycol)diacrylate(PEGDA),are characterized by high crystallinity,which causes polymer chains to be tightly packed and rigid.This restricts the segmental motion within the SPEs,resulting in low ionic conductivity.Secondly,compared to lithium ions,anions with large ionic radii and low charge density typically form weaker interactions with the polymer chains,which facilitates their mobility and results in a low lithium-ion transference number(tt).Thirdly,the weak interactions between polymer chains in typical SPEs lead to a low elastic modulus,which in turn compromises their poor mechanical strength.展开更多
文摘目的研究PC-SPESⅡ对雄激素非依赖性前列腺癌(AIPCa)基因表达的影响。方法雄性Balb/c-nu/nu裸小鼠20只,随机分为对照、PC-SPESⅡ组,每组10只,接种AIPCa细胞DU145建立动物模型。接种第2天起给药,8周后取肿瘤组织,应用human androgen signaling and prostate cancer gene array基因芯片,分析PC-SPESⅡ引起的基因表达变化。为验证基因芯片结果,选择应用RT-PCR方法检测IGF-1mRNA变化。结果30个基因表达下调,包括AIPCa凋亡耐受基因EIF4EBP和FOXj、AIPCa转化基因ADM和PCNA,AIPCa细胞表面标记物PSCA和FAS,以及侵袭性相关基因IGF-1、Met-1、B-myb等。11个基因表达上调,包括AIPCa细胞生长抑制基因PMEPA1和SFRP4,雄激素依赖性细胞表面标记物TMPPSS2、KLK3(PSA)、DD3和STEAP等。结论PC-SPESⅡ可能通过抑制AIPCa凋亡耐受机制、改善AIPCa表型,恢复雄激素依赖性、降低转移能力等多种途径发挥抗AIPCa作用。
基金financially supported by the National Key Research and Development Program of China(No.2021YFB3801500)Fundamental Research Funds of Zhejiang Sci-Tech University(No.24202105-Y)。
文摘Solid polymer electrolytes(SPEs)are considered promising candidates for all-solid-state lithium metal batteries because of their easy preparation and good compatibility with lithium metal.However,their applications are restricted by their low ionic conductivity and poor mechanical properties.In this study,a composite solid polymer electrolyte composed of poly(ethylene oxide)(PEO),poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP),plasticizer succinonitrile(SN),and polytetrafluoroethylene(PTFE)fibrous porous membranes was prepared.The PTFE fibrous membrane significantly enhanced the mechanical strength of the electrolyte as a supporting framework.SN reduced the crystalline regions of PEO and facilitated rapid lithium-ion transport.PVDF-HFP promoted lithium salt dissolution and improved the electrochemical stability of the electrolyte.Accordingly,the optimized PTFE/PEO/PVDF-HFP/SN polymer electrolyte exhibited a tensile strength of 3.31 MPa at 352%elongation and demonstrated an ionic conductivity of 7.6×10^(-4)S·cm^(-1)at 60℃.Lithium symmetric cells maintained stable cycling for over 2500 h at 0.15 m A·cm^(-2),and Li//Li Fe PO_(4) full cells showed a high capacity retention of 91.6%after 300 cycles at 0.5 C,with coulombic efficiency consistently exceeding 99.9%throughout cycling.
基金supported by the University of Wollongong,Wollongong,Australiafinancial support from the National Natural Science Foundation of China(22272086)Natural Science Foundation of Sichuan Province(2023NSFSC0009).
文摘Compared to currently commercialized lithium-ion batteries,which use flammable organic liquid electrolytes and low-energy-density graphite anodes,solid-state lithium-metal batteries(SSLMBs)offer enhanced energy density and improved safety,making them promising alternatives for next-generation rechargeable batteries[1].As a crucial component of these batteries,solid-state electrolytes—divided into inorganic solid ceramic electrolytes(SCEs)and organic solid polymer electrolytes(SPEs)—are vital for lithium-ion transport and inhibiting lithium dendrite growth.Among them,SCEs exhibit high ionic conductivity,excellent mechanical properties,and outstanding electrochemical and thermal stability.Nevertheless,their brittleness,interfacial challenges with electrodes,and the requirement for high stacking pressure during battery operation significantly hinder their scalable application.In comparison,SPEs are more favourable for manufacturing due to their flexibility and good interfacial compatibility with electrodes[2].Despite these advantages,SPEs still face significant challenges in achieving practical application.Firstly,typical SPEs,such as poly(ethylene oxide)(PEO),poly(vinylidene fluoride)(PVDF),and poly(ethylene glycol)diacrylate(PEGDA),are characterized by high crystallinity,which causes polymer chains to be tightly packed and rigid.This restricts the segmental motion within the SPEs,resulting in low ionic conductivity.Secondly,compared to lithium ions,anions with large ionic radii and low charge density typically form weaker interactions with the polymer chains,which facilitates their mobility and results in a low lithium-ion transference number(tt).Thirdly,the weak interactions between polymer chains in typical SPEs lead to a low elastic modulus,which in turn compromises their poor mechanical strength.
