Histone modifications play crucial roles in the pathogenesis of myocardial ischaemia/reperfusion(I/R)injury.However,a genome-wide map of histone modifications and the underlying epigenetic signatures in myocardial I/R...Histone modifications play crucial roles in the pathogenesis of myocardial ischaemia/reperfusion(I/R)injury.However,a genome-wide map of histone modifications and the underlying epigenetic signatures in myocardial I/R injury have not been established.Here,we integrated transcriptome and epigenome of histone modifications to characterize epigenetic signatures after I/R injury.Disease-specific histone mark alterations were mainly found in H3K27me3-,H3K27ac-,and H3K4me1-marked regions 24 and 48 h after I/R.Genes differentially modified by H3K27ac,H3K4me1 and H3K27me3 were involved in immune response,heart conduction or contraction,cytoskeleton,and angiogenesis.H3K27me3 and its methyltransferase polycomb repressor complex 2(PRC2)were upregulated in myocardial tissues after I/R.Upon selective inhibition of EZH2(the catalytic core of PRC2),the mice manifest improved cardiac function,enhanced angiogenesis,and reduced fibrosis.Further investigations confirmed that EZH2 inhibition regulated H3K27me3 modification of multiple pro-angiogenic genes and ultimately enhanced angiogenic properties in vivo and in vitro.This study delineates a landscape of histone modifications in myocardial I/R injury,and identifies H3K27me3 as a key epigenetic modifier in I/R process.The inhibition of H3K27me3 and its methyltransferase might be a potential strategy for myocardial I/R injury intervention.展开更多
Pickering emulsions are emulsions stabilized by colloidal surfactants,i.e.solid particles.Compared with traditional molecular suffactant-stabilized emulsions,Pickering emulsions show many advantages,such as high resis...Pickering emulsions are emulsions stabilized by colloidal surfactants,i.e.solid particles.Compared with traditional molecular suffactant-stabilized emulsions,Pickering emulsions show many advantages,such as high resistance to coalescence,long-term stability,good biocompatibility and tunable properties.In recent years,Pickering emulsions are widely applied in scientific researches and industrial applications.In this review,we focus on the influences of particle properties on Pickering emulsions,including particle amphiphilicity,concentration,size and shape,and summarize the strategies developed for the preparation of amphiphilic Janus particles.The applications of Pickering emulsions in food industry,cosmetic industry,material science,drug delivery,biomedical research and vaccine adjuvant will also be covered.Pickering emulsions are a unique system for multi-disciplinary studies and will become more and more important in the future.展开更多
基金supported by the National Natural Science Foundation of China (82088101,81930013,82000377,31871491)the National Key Research and Development Plan (2019YFA0801501)+5 种基金Key Research Center Construction Project of Shanghai (2022ZZ01008)Shanghai Key clinical specialty Project (shslczdzk06202)Key Disciplines Group Construction Project of Pudong Health Bureau of Shanghai (PWZxq2017-05)Top-level Clinical Discipline Project of Shanghai Pudong District (PWYgf2021-01)Program for the Research Unit of Origin and Regulation of Heart Rhythm,Chinese Academy of Medical Sciences (2019RU045)Innovative research team of high-level local universities in Shanghai and a key laboratory program of the Education Commission of Shanghai Municipality (ZDSYS14005)。
文摘Histone modifications play crucial roles in the pathogenesis of myocardial ischaemia/reperfusion(I/R)injury.However,a genome-wide map of histone modifications and the underlying epigenetic signatures in myocardial I/R injury have not been established.Here,we integrated transcriptome and epigenome of histone modifications to characterize epigenetic signatures after I/R injury.Disease-specific histone mark alterations were mainly found in H3K27me3-,H3K27ac-,and H3K4me1-marked regions 24 and 48 h after I/R.Genes differentially modified by H3K27ac,H3K4me1 and H3K27me3 were involved in immune response,heart conduction or contraction,cytoskeleton,and angiogenesis.H3K27me3 and its methyltransferase polycomb repressor complex 2(PRC2)were upregulated in myocardial tissues after I/R.Upon selective inhibition of EZH2(the catalytic core of PRC2),the mice manifest improved cardiac function,enhanced angiogenesis,and reduced fibrosis.Further investigations confirmed that EZH2 inhibition regulated H3K27me3 modification of multiple pro-angiogenic genes and ultimately enhanced angiogenic properties in vivo and in vitro.This study delineates a landscape of histone modifications in myocardial I/R injury,and identifies H3K27me3 as a key epigenetic modifier in I/R process.The inhibition of H3K27me3 and its methyltransferase might be a potential strategy for myocardial I/R injury intervention.
基金supported by Zhejiang Provincial Natural Science Foundation(Grant No.Y20B060027)National Natural Science Foundation of China(Grant No.21878258)+3 种基金Zhejiang University Education Foundation Global Partnership FundInnovation Project of Keqiaosupported by the National Science Foundation(DMR1310266)the Harvard Materials Research Science and Engineering Center(DMR-1420570).
文摘Pickering emulsions are emulsions stabilized by colloidal surfactants,i.e.solid particles.Compared with traditional molecular suffactant-stabilized emulsions,Pickering emulsions show many advantages,such as high resistance to coalescence,long-term stability,good biocompatibility and tunable properties.In recent years,Pickering emulsions are widely applied in scientific researches and industrial applications.In this review,we focus on the influences of particle properties on Pickering emulsions,including particle amphiphilicity,concentration,size and shape,and summarize the strategies developed for the preparation of amphiphilic Janus particles.The applications of Pickering emulsions in food industry,cosmetic industry,material science,drug delivery,biomedical research and vaccine adjuvant will also be covered.Pickering emulsions are a unique system for multi-disciplinary studies and will become more and more important in the future.