Dengue fever remains a significant public health challenge in Malaysia,with its incidence continuing to rise despite existing control measures.Dengue,a disease caused by the dengue virus and transmitted by Aedes mosqu...Dengue fever remains a significant public health challenge in Malaysia,with its incidence continuing to rise despite existing control measures.Dengue,a disease caused by the dengue virus and transmitted by Aedes mosquitoes,places a substantial burden on healthcare systems and economic productivity.Despite efforts by the Malaysian government,including the release of Wolbachia-carrying Aedes aegypti mosquitoes in dengue hotspot areas since 2017,the problem persists.In 2023,Malaysia reported 123133 dengue cases,an 86.3%increase compared to 2022[1].This highlights the urgent need for more effective interventions,including the potential integration of dengue vaccines into routine immunization programs.Currently,two dengue vaccines have been licensed:Dengvaxia(CYD-TDV)by Sanofi Pasteur and Qdenga(TAK-003)by Takeda.Dengvaxia,the first licensed dengue vaccine,has significant limitations,as it increases the risk of hospitalization in dengue-naïve individuals due to antibody-dependent enhancement[2,3].As a result,it is only licensed for individuals with prior dengue infections,necessitating pre-vaccination screening.These constraints make it unsuitable for inclusion in Malaysia’s routine immunization programs.展开更多
Porcine epidemic diarrhea virus(PEDV),an enteric coronavirus,is widely spread worldwide and causes huge economic losses.The effective measure to control the viral infection is to develop ideal vaccines.Here,the collag...Porcine epidemic diarrhea virus(PEDV),an enteric coronavirus,is widely spread worldwide and causes huge economic losses.The effective measure to control the viral infection is to develop ideal vaccines.Here,the collagenase equivalent domain(COE)of PEDV was displayed on the surface of nanoparticles(NPs)in order to develop a newer,safer and more effective subunit vaccine against PEDV.The monomeric COE was displayed on the mi3 protein,which self-assembles into nanoparticles composed of 60 subunits,using the SpyTag/SpyCatcher system.The size,zeta potential,microstructure of the COE-mi3 virus-like particles(VLPs)were investigated.The COE-mi3 VLPs that possessed good security,stability and better retention can be more efficiently taken up by antigen-presenting cells(APCs)and help promote dendritic cells(DCs)maturation.Moreover,COE-mi3 VLPs could prominently improve specifc antibody levels including neutralizing antibodies(NAbs),and serum IgG,mucosal IgA.Moreover,COE-mi3 VLPs elicited more activation of CD4^(+)and CD8^(+)T cells and production of IFN-γand IL-4 cytokines.In particular,COE-mi3 VLPs is an effectual antigen-delivery platform to enhance germinal center(GC)B cell responses.This structure-based self-assembly of NP gives great potential to be developed as a new subunit vaccines attractive platform,and may also provide new ideas for the development of other enteric coronavirus vaccines.展开更多
[Objectives]This study was conducted to evaluate the immunization efficacy and infection status of classical swine fever(CSF),foot-and-mouth disease(FMD),porcine reproductive and respiratory syndrome(PRRS),pseudorabie...[Objectives]This study was conducted to evaluate the immunization efficacy and infection status of classical swine fever(CSF),foot-and-mouth disease(FMD),porcine reproductive and respiratory syndrome(PRRS),pseudorabies(PR),and porcine circovirus type 2(PCV2)in large-scale pig farms.[Methods]Antibody and pathogen detection was performed on 56 serum samples collected in March 2025.[Results]The antibody qualification rates for CSF,FMD,and PRRS were 76.8%,73.2%,and 76.8%,respectively,all meeting the national standards.However,nursery pigs exhibited an immunity gap,indicating a need for timely booster vaccinations.No PRV gE antibodies or PCV2 antibodies were detected,reflecting the absence of vaccination against these diseases and suggesting significant effectiveness of comprehensive biosecurity measures.The low antibody qualification rate for PRRS in the nursery stage highlights the need for improved immunization management.[Conclusions]This study provides data support and practical insights for integrated disease prevention and control in large-scale pig farms.展开更多
溃疡性结肠炎(ulcerative colitis,UC)是一种以结肠黏膜及黏膜下层炎症为主要特征的慢性非特异性炎症,其致病机制复杂,易反复发作,现代医学研究认为其涉及氧化应激、免疫失衡等多方面因素。信号转导和转录激活因子3(signal transducer a...溃疡性结肠炎(ulcerative colitis,UC)是一种以结肠黏膜及黏膜下层炎症为主要特征的慢性非特异性炎症,其致病机制复杂,易反复发作,现代医学研究认为其涉及氧化应激、免疫失衡等多方面因素。信号转导和转录激活因子3(signal transducer and activator of transcription,STAT3)是调节细胞生长、分化和存活的重要因子,可被相关细胞因子激活,从而介导炎症、氧化应激及免疫反应以影响UC病理进程,并与核因子κB(nuclear factor kappa-B,NF-κB)、NOD样受体热蛋白结构域相关蛋白3(NOD-like receptor thermal protein domain associated protein 3,NLRP3)、细胞因子信号传导抑制因子(suppressor of cytokine signaling,SOCSs)等信号通路存在串扰现象。STAT3作为近年来UC相关研究的热点之一,本文综述了中药通过调控STAT3信号通路防治UC的研究进展,深入探究了STAT3激活及介导UC病理过程的分子机制,以及中药成分如何通过多途径调控STAT3信号通路,发挥其潜在的作用机制。相关研究揭示了中药通过调节STAT3信号通路,不仅有效抑制炎症、氧化应激的发生,还能在调控免疫反应、维持肠道屏障功能及完整性等方面发挥重要作用,有望为治疗UC提供新思路。展开更多
文摘Dengue fever remains a significant public health challenge in Malaysia,with its incidence continuing to rise despite existing control measures.Dengue,a disease caused by the dengue virus and transmitted by Aedes mosquitoes,places a substantial burden on healthcare systems and economic productivity.Despite efforts by the Malaysian government,including the release of Wolbachia-carrying Aedes aegypti mosquitoes in dengue hotspot areas since 2017,the problem persists.In 2023,Malaysia reported 123133 dengue cases,an 86.3%increase compared to 2022[1].This highlights the urgent need for more effective interventions,including the potential integration of dengue vaccines into routine immunization programs.Currently,two dengue vaccines have been licensed:Dengvaxia(CYD-TDV)by Sanofi Pasteur and Qdenga(TAK-003)by Takeda.Dengvaxia,the first licensed dengue vaccine,has significant limitations,as it increases the risk of hospitalization in dengue-naïve individuals due to antibody-dependent enhancement[2,3].As a result,it is only licensed for individuals with prior dengue infections,necessitating pre-vaccination screening.These constraints make it unsuitable for inclusion in Malaysia’s routine immunization programs.
基金supported by the Major Scientific and Technological Project of the Henan Province,China(221100110600)the Beijing Life Science Academy,China(2024500CA0010)+1 种基金the Major Program of National Natural Science Foundation of China(32192452)the Chinese Postdoctoral Science Foundation(2023M743209)。
文摘Porcine epidemic diarrhea virus(PEDV),an enteric coronavirus,is widely spread worldwide and causes huge economic losses.The effective measure to control the viral infection is to develop ideal vaccines.Here,the collagenase equivalent domain(COE)of PEDV was displayed on the surface of nanoparticles(NPs)in order to develop a newer,safer and more effective subunit vaccine against PEDV.The monomeric COE was displayed on the mi3 protein,which self-assembles into nanoparticles composed of 60 subunits,using the SpyTag/SpyCatcher system.The size,zeta potential,microstructure of the COE-mi3 virus-like particles(VLPs)were investigated.The COE-mi3 VLPs that possessed good security,stability and better retention can be more efficiently taken up by antigen-presenting cells(APCs)and help promote dendritic cells(DCs)maturation.Moreover,COE-mi3 VLPs could prominently improve specifc antibody levels including neutralizing antibodies(NAbs),and serum IgG,mucosal IgA.Moreover,COE-mi3 VLPs elicited more activation of CD4^(+)and CD8^(+)T cells and production of IFN-γand IL-4 cytokines.In particular,COE-mi3 VLPs is an effectual antigen-delivery platform to enhance germinal center(GC)B cell responses.This structure-based self-assembly of NP gives great potential to be developed as a new subunit vaccines attractive platform,and may also provide new ideas for the development of other enteric coronavirus vaccines.
基金Supported by Guizhou Provincial Department of Agriculture and Rural Affairs Project(QNYZZZ[2017]No.12,GZSZCYJSTX-04)2025 Quality Supervision and Sampling Project of Normal Temperature Semen for Breeding Pigs(2025-1-10).
文摘[Objectives]This study was conducted to evaluate the immunization efficacy and infection status of classical swine fever(CSF),foot-and-mouth disease(FMD),porcine reproductive and respiratory syndrome(PRRS),pseudorabies(PR),and porcine circovirus type 2(PCV2)in large-scale pig farms.[Methods]Antibody and pathogen detection was performed on 56 serum samples collected in March 2025.[Results]The antibody qualification rates for CSF,FMD,and PRRS were 76.8%,73.2%,and 76.8%,respectively,all meeting the national standards.However,nursery pigs exhibited an immunity gap,indicating a need for timely booster vaccinations.No PRV gE antibodies or PCV2 antibodies were detected,reflecting the absence of vaccination against these diseases and suggesting significant effectiveness of comprehensive biosecurity measures.The low antibody qualification rate for PRRS in the nursery stage highlights the need for improved immunization management.[Conclusions]This study provides data support and practical insights for integrated disease prevention and control in large-scale pig farms.
文摘溃疡性结肠炎(ulcerative colitis,UC)是一种以结肠黏膜及黏膜下层炎症为主要特征的慢性非特异性炎症,其致病机制复杂,易反复发作,现代医学研究认为其涉及氧化应激、免疫失衡等多方面因素。信号转导和转录激活因子3(signal transducer and activator of transcription,STAT3)是调节细胞生长、分化和存活的重要因子,可被相关细胞因子激活,从而介导炎症、氧化应激及免疫反应以影响UC病理进程,并与核因子κB(nuclear factor kappa-B,NF-κB)、NOD样受体热蛋白结构域相关蛋白3(NOD-like receptor thermal protein domain associated protein 3,NLRP3)、细胞因子信号传导抑制因子(suppressor of cytokine signaling,SOCSs)等信号通路存在串扰现象。STAT3作为近年来UC相关研究的热点之一,本文综述了中药通过调控STAT3信号通路防治UC的研究进展,深入探究了STAT3激活及介导UC病理过程的分子机制,以及中药成分如何通过多途径调控STAT3信号通路,发挥其潜在的作用机制。相关研究揭示了中药通过调节STAT3信号通路,不仅有效抑制炎症、氧化应激的发生,还能在调控免疫反应、维持肠道屏障功能及完整性等方面发挥重要作用,有望为治疗UC提供新思路。
