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Extracellular histones stimulate collagen expression in vitro and promote liver fibrogenesis in a mouse model via the TLR4-MyD88 signaling pathway 被引量:7
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作者 Zhi Wang Zhen-Xing Cheng +7 位作者 Simon T Abrams Zi-Qi Lin ED Yates Qian Yu Wei-Ping Yu Ping-Sheng Chen Cheng-Hock Toh Guo-Zheng Wang 《World Journal of Gastroenterology》 SCIE CAS 2020年第47期7513-7527,共15页
BACKGROUND Liver fibrosis progressing to liver cirrhosis and hepatic carcinoma is very common and causes more than one million deaths annually.Fibrosis develops from recurrent liver injury but the molecular mechanisms... BACKGROUND Liver fibrosis progressing to liver cirrhosis and hepatic carcinoma is very common and causes more than one million deaths annually.Fibrosis develops from recurrent liver injury but the molecular mechanisms are not fully understood.Recently,the TLR4-MyD88 signaling pathway has been reported to contribute to fibrosis.Extracellular histones are ligands of TLR4 but their roles in liver fibrosis have not been investigated.AIM To investigate the roles and potential mechanisms of extracellular histones in liver fibrosis.METHODS In vitro,LX2 human hepatic stellate cells(HSCs)were treated with histones in the presence or absence of non-anticoagulant heparin(NAHP)for neutralizing histones or TLR4-blocking antibody.The resultant cellular expression of collagen I was detected using western blotting and immunofluorescent staining.In vivo,the CCl4-induced liver fibrosis model was generated in male 6-week-old ICR mice and in TLR4 or MyD88 knockout and parental mice.Circulating histones were detected and the effect of NAHP was evaluated.RESULTS Extracellular histones strongly stimulated LX2 cells to produce collagen I.Histone-enhanced collagen expression was significantly reduced by NAHP and TLR4-blocking antibody.In CCl4-treated wild type mice,circulating histones were dramatically increased and maintained high levels during the duration of fibrosisinduction.Injection of NAHP not only reduced alanine aminotransferase and liver injury scores,but also significantly reduced fibrogenesis.Since the TLR4-blocking antibody reduced histone-enhanced collagen I production in HSC,the CCl4 model with TLR4 and MyD88 knockout mice was used to demonstrate the roles of the TLR4-MyD88 signaling pathway in CCl4-induced liver fibrosis.The levels of liver fibrosis were indeed significantly reduced in knockout mice compared to wild type parental mice.CONCLUSION Extracellular histones potentially enhance fibrogenesis via the TLR4–MyD88 signaling pathway and NAHP has therapeutic potential by detoxifying extracellular histones. 展开更多
关键词 Liver fibrosis Extracellular histones Non-anticoagulant heparin TLR4 MYD88 CCL4
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Multifunctionality of the linker histones: an emerging role for protein-protein interactions 被引量:2
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作者 Steven J McBryant Xu Lu Jeffrey C Hansen 《Cell Research》 SCIE CAS CSCD 2010年第5期519-528,共10页
Linker histones, e.g., H1, are best known for their ability to bind to nucleosomes and stabilize both nucleosome structure and condensed higher-order chromatin structures. However, over the years many investigators ha... Linker histones, e.g., H1, are best known for their ability to bind to nucleosomes and stabilize both nucleosome structure and condensed higher-order chromatin structures. However, over the years many investigators have reported specific interactions between linker histones and proteins involved in important cellular processes. The purpose of this review is to highlight evidence indicating an important alternative mode of action for H1, namely protein-protein interactions. We first review key aspects of the traditional view of linker histone action, including the importance of the H1 C-terminal domain. We then discuss the current state of knowledge of linker histone interactions with other proteins, and, where possible, highlight the mechanism of linker histone-mediated protein-protein interactions. Taken together, the data suggest a combinatorial role for the linker histones, functioning both as primary chromatin architectural proteins and simultaneously as recruitment hubs for proteins involved in accessing and modifying the chromatin fiber. 展开更多
关键词 CHROMATIN linker histone higher-order structure NUCLEOSOMES
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Brownian dynamics simulation of the cross-talking effect among modified histones on conformations of nucleosomes
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作者 段兆文 李伟 +2 位作者 谢平 窦硕星 王鹏业 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第4期461-468,共8页
Using Brownian dynamics simulation, we studied the effect of histone modifications On conformations of an array of nucleosomes in a segment of chromatin. The simulation demonstrated that the segment of chromatin shows... Using Brownian dynamics simulation, we studied the effect of histone modifications On conformations of an array of nucleosomes in a segment of chromatin. The simulation demonstrated that the segment of chromatin shows the dynamic behaviour that its conformation can switch between a state with nearly all of the histones being wrapped by DNA and a state with nearly all of the histones being unwrapped by DNA, thus involving the "cross-talking" interactions among the histones. Each state can stay for a sufficiently long time. These conformational states are essential for gene expression or gene silence. The simulation also shows that these conformational states can be inherited by the daughter DNAs during DNA replication, giving a theoretical explanation of the epigenetic phenomenon. 展开更多
关键词 NUCLEOSOME histone modification DNA Brownian dynamics
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Histones released by NETosis enhance the infectivity of SARS-CoV-2 by bridging the spike protein subunit 2 and sialic acid on host cells 被引量:2
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作者 Weiqi Hong Jingyun Yang +54 位作者 Jun Zou Zhenfei Bi Cai He Hong Lei Xuemei He Xue Li Aqu Alu Wenyan Ren Zeng Wang Xiaohua Jiang Kunhong Zhong Guowen Jia Yun Yang Wenhai Yu Qing Huang Mengli Yang Yanan Zhou Yuan Zhao Dexuan Kuang Junbin Wang Haixuan Wang Siyuan Chen Min Luo Ziqi Zhang Tiangi Lu Li Chen Haiying Que Zhiyao He Qiu Sun Wei Wang Guobo Shen Guangwen Lu Zhiwei Zhao Li Yang Jinliang Yang Zhenling Wang Jiong Li Xiangrong Song Lunzhi Dai Chong Chen Jia Geng Maling Gou Lu Chen Haohao Dong Yong Peng Canhua Huang Zhiyong Qian Wei Cheng Changfa Fan Yuquan Wei Zhaoming Su Aiping Tong Shuaiyao Lu Xiaozhong Peng Xiawei Wei 《Cellular & Molecular Immunology》 SCIE CAS CSCD 2022年第5期577-587,共11页
Neutrophil extracellular traps(NETs)can capture and kill viruses,such as influenza viruses,human immunodeficiency virus(HIV),and respiratory syncytial virus(RSV),thus contributing to host defense.Contrary to our expec... Neutrophil extracellular traps(NETs)can capture and kill viruses,such as influenza viruses,human immunodeficiency virus(HIV),and respiratory syncytial virus(RSV),thus contributing to host defense.Contrary to our expectation,we show here that the histones released by NETosis enhance the infectivity of SARS-CoV-2,as found by using live SARS-CoV-2 and two pseudovirus systems as well as a mouse model.The histone H3 or H4 selectively binds to subunit 2 of the spike(S)protein,as shown by a biochemical binding assay,surface plasmon resonance and binding energy calculation as well as the construction of a mutant S protein by replacing four acidic amino acids.Sialic acid on the host cell surface is the key molecule to which histones bridge subunit 2 of the S protein.Moreover,histones enhance cell-cell fusion.Finally,treatment with an inhibitor of NETosis,histone H3 or H4,or sialic acid notably affected the levels of sgRNA copies and the number of apoptotic cells in a mouse model.These findings suggest that SARS-CoV-2 could hijack histones from neutrophil NETosis to promote its host cell attachment and entry process and may be important in exploring pathogenesis and possible strategies to develop new effective therapies for COVID-19. 展开更多
关键词 COVID-19 SARS-CoV-2 neutrophil extracellular traps histones sialic acid
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Epigenetic regulation of the inflammatory response in stroke
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作者 Jingyi Liang Fei Yang +1 位作者 Zixiao Li Qian Li 《Neural Regeneration Research》 SCIE CAS 2025年第11期3045-3062,共18页
Stroke is classified as ischemic or hemorrhagic,and there are few effective treatments for either type.Immunologic mechanisms play a critical role in secondary brain injury following a stroke,which manifests as cytoki... Stroke is classified as ischemic or hemorrhagic,and there are few effective treatments for either type.Immunologic mechanisms play a critical role in secondary brain injury following a stroke,which manifests as cytokine release,blood–brain barrier disruption,neuronal cell death,and ultimately behavioral impairment.Suppressing the inflammatory response has been shown to mitigate this cascade of events in experimental stroke models.However,in clinical trials of anti-inflammatory agents,longterm immunosuppression has not demonstrated significant clinical benefits for patients.This may be attributable to the dichotomous roles of inflammation in both tissue injury and repair,as well as the complex pathophysiologic inflammatory processes in stroke.Inhibiting acute harmful inflammatory responses or inducing a phenotypic shift from a pro-inflammatory to an anti-inflammatory state at specific time points after a stroke are alternative and promising therapeutic strategies.Identifying agents that can modulate inflammation requires a detailed understanding of the inflammatory processes of stroke.Furthermore,epigenetic reprogramming plays a crucial role in modulating post-stroke inflammation and can potentially be exploited for stroke management.In this review,we summarize current findings on the epigenetic regulation of the inflammatory response in stroke,focusing on key signaling pathways including nuclear factor-kappa B,Janus kinase/signal transducer and activator of transcription,and mitogen-activated protein kinase as well as inflammasome activation.We also discuss promising molecular targets for stroke treatment.The evidence to date indicates that therapeutic targeting of the epigenetic regulation of inflammation can shift the balance from inflammation-induced tissue injury to repair following stroke,leading to improved post-stroke outcomes. 展开更多
关键词 DNA methylation histone modification intracerebral hemorrhage ischemic stroke NEUROINFLAMMATION NEUROPROTECTION non-coding RNA RNA methylation subarachnoid hemorrhage treatment
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Targeting epigenetic mechanisms in amyloid-β-mediated Alzheimer’s pathophysiology:unveiling therapeutic potential
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作者 Jennie Z.Li Nagendran Ramalingam Shaomin Li 《Neural Regeneration Research》 SCIE CAS 2025年第1期54-66,共13页
Alzheimer’s disease is a prominent chronic neurodegenerative condition characterized by a gradual decline in memory leading to dementia.Growing evidence suggests that Alzheimer’s disease is associated with accumulat... Alzheimer’s disease is a prominent chronic neurodegenerative condition characterized by a gradual decline in memory leading to dementia.Growing evidence suggests that Alzheimer’s disease is associated with accumulating various amyloid-βoligomers in the brain,influenced by complex genetic and environmental factors.The memory and cognitive deficits observed during the prodromal and mild cognitive impairment phases of Alzheimer’s disease are believed to primarily result from synaptic dysfunction.Throughout life,environmental factors can lead to enduring changes in gene expression and the emergence of brain disorders.These changes,known as epigenetic modifications,also play a crucial role in regulating the formation of synapses and their adaptability in response to neuronal activity.In this context,we highlight recent advances in understanding the roles played by key components of the epigenetic machinery,specifically DNA methylation,histone modification,and microRNAs,in the development of Alzheimer’s disease,synaptic function,and activity-dependent synaptic plasticity.Moreover,we explore various strategies,including enriched environments,exposure to non-invasive brain stimulation,and the use of pharmacological agents,aimed at improving synaptic function and enhancing long-term potentiation,a process integral to epigenetic mechanisms.Lastly,we deliberate on the development of effective epigenetic agents and safe therapeutic approaches for managing Alzheimer’s disease.We suggest that addressing Alzheimer’s disease may require distinct tailored epigenetic drugs targeting different disease stages or pathways rather than relying on a single drug. 展开更多
关键词 Alzheimer’s disease DNA methylation enriched environments histone modification microRNAs non-invasive brain stimulation synaptic plasticity
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Enhanced autophagic clearance of amyloid-βvia histone deacetylase 6-mediated V-ATPase assembly and lysosomal acidification protects against Alzheimer's disease in vitro and in vivo
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作者 Zhimin Long Chuanhua Ge +5 位作者 Yueyang Zhao Yuanjie Liu Qinghua Zeng Qing Tang Zhifang Dong Guiqiong He 《Neural Regeneration Research》 SCIE CAS 2025年第9期2633-2644,共12页
Recent studies have suggested that abnormal acidification of lysosomes induces autophagic accumulation of amyloid-βin neurons,which is a key step in senile plaque formation.Therefore,resto ring normal lysosomal funct... Recent studies have suggested that abnormal acidification of lysosomes induces autophagic accumulation of amyloid-βin neurons,which is a key step in senile plaque formation.Therefore,resto ring normal lysosomal function and rebalancing lysosomal acidification in neurons in the brain may be a new treatment strategy for Alzheimer's disease.Microtubule acetylation/deacetylation plays a central role in lysosomal acidification.Here,we show that inhibiting the classic microtubule deacetylase histone deacetylase 6 with an histone deacetylase 6 shRNA or thehistone deacetylase 6 inhibitor valproic acid promoted lysosomal reacidification by modulating V-ATPase assembly in Alzheimer's disease.Fu rthermore,we found that treatment with valproic acid markedly enhanced autophagy.promoted clearance of amyloid-βaggregates,and ameliorated cognitive deficits in a mouse model of Alzheimer's disease.Our findings demonstrate a previously unknown neuroprotective mechanism in Alzheimer's disease,in which histone deacetylase 6 inhibition by valproic acid increases V-ATPase assembly and lysosomal acidification. 展开更多
关键词 Alzheimer's disease amyloid-β APP/PS1 mice autophagy cognitive impairment histone deacetylase 6 lysosomal acidification microtubule acetylation valproic acid V-ATPASE
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Roles of histones and nucleosomes in gene transcription
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作者 Baiqu Huang Qinhua Zeng +2 位作者 Xiaohui Bi Yuhong Wang Yuxin Li 《Chinese Science Bulletin》 SCIE EI CAS 2001年第3期184-188,共5页
This article reviews the latest research developments in the field of eukaryotic gene regulation by the structural alterations of chromatin and nucleosomes. The following issues are briefly addressed: (i) nucleosome a... This article reviews the latest research developments in the field of eukaryotic gene regulation by the structural alterations of chromatin and nucleosomes. The following issues are briefly addressed: (i) nucleosome and histone modifications by both the ATP-dependent remodeling complexes and the histone acetyltransferases and their roles in gene activation; (ii) competitive binding of histones and transcription factors on gene promoters, and transcription repression by nucleosomes; and (iii) influences of linker histone HI on gene regulation. Meanwhile, the significance and impact of these new research progresses, as well as issues worthwhile for further study are commented. 展开更多
关键词 histones NUCLEOSOME CHROMATIN REMODELING gene transcription.
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A tumor-penetrable drug nanococktail made from human histones for interventional nucleus-targeted chemophotothermal therapy of drug-resistant tumors
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作者 Jianquan Guo Dongsheng Tan +5 位作者 Chenmei Lou Shiying Guo Xing Jin Haijing Qu Lijia Jing Sijin Li 《Bioactive Materials》 SCIE 2022年第3期554-565,共12页
Nanoparticle-based chemophotothermal therapy(CPT)is a promising treatment for multidrug resistant tumors.In this study,a drug nanococktail of DIR825@histone was developed by employing doxorubicin(DOX),NIR dye IR825 an... Nanoparticle-based chemophotothermal therapy(CPT)is a promising treatment for multidrug resistant tumors.In this study,a drug nanococktail of DIR825@histone was developed by employing doxorubicin(DOX),NIR dye IR825 and human histones for interventional nucleus-targeted CPT of multidrug resistant tumors with an interventional laser.After localized intervention,DIR825@histone penetrated tumor tissues by transcytosis,efficiently entered tumor cells and targeted the cell nuclei.DIR825@histone also exhibited good photothermal performance and thermal-triggered drug release.Efficient multidrug resistant tumor inhibition was achieved by enhanced CPT sensitization and MDR reversion via nuclear targeting.Moreover,an interventional laser assisted DIR825@histone in inhibiting multidrug resistant tumors by promoting the sufficient delivery of laser energy inside the tumor while reducing skin injury.Therefore,DIR825@histone together with this interventional nucleus-targeted CPT strategy holds great promise for treating multidrug resistant tumors. 展开更多
关键词 Human histones Chemotherapy Photothermal therapy Nuclear targeting Localized intervention Drug resistant tumor
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Targeting histones for degradation in cancer cells as a novel strategy in cancer treatment 被引量:2
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作者 Yesheng Yin Qianqian Zhu +2 位作者 Tianxia Jiang Libin Fan Xiaobo Qiu 《Science China(Life Sciences)》 SCIE CAS CSCD 2019年第8期1078-1086,共9页
The anticancer therapies with the joint treatment of a histone deacetylase(HDAC) inhibitor and a DNA-damaging approach are actively under clinical investigations, but the underlying mechanism is unclear. Histone homeo... The anticancer therapies with the joint treatment of a histone deacetylase(HDAC) inhibitor and a DNA-damaging approach are actively under clinical investigations, but the underlying mechanism is unclear. Histone homeostasis is critical to genome stability, transcriptional accuracy, DNA repair process, senescence, and survival. We have previously demonstrated that the HDAC inhibitor, trichostatin A(TSA), could promote the degradation of the core histones induced by γ-radiation or the DNAalkylating agent methyl methanesulfonate(MMS) in non-cancer cells, including mouse spermatocyte and embryonic fibroblast cell lines. In this study, we found that the joint treatment by TSA and MMS induced the death of the cultured cancer cells with an additive effect, but induced degradation of the core histones synergistically in these cells. We then analyzed various combinations of other HDAC inhibitors, including suberoylanilide hydroxamic acid and valproate sodium, with MMS or other DNAdamaging agents, including etoposide and camptothecin. Most of these combined treatments induced cell death additively, but all the tested combinations induced degradation of the core histones synergistically. Meanwhile, we showed that cell cycle arrest might not be a primary consequence for the joint treatment of TSA and MMS. Given that clinic treatments of cancers jointly with an HDAC inhibitor and a DNA-damaging approach often show synergistic effects, histone degradation might more accurately underlie the synergistic effects of these joint treatments in clinic applications than other parameters, such as cell death and cell cycle arrest. Thus, our studies might suggest that the degradation of the core histones can serve as a new target for the development of cancer therapies. 展开更多
关键词 HDAC HISTONE DEACETYLASE inhibitor DNA damage ANTICANCER agent HISTONE DEGRADATION
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Open and Closed: The Roles of Linker Histones in Plants and Animals 被引量:2
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作者 Ryan S. Over Scott D. Michaels 《Molecular Plant》 SCIE CAS CSCD 2014年第3期481-491,共11页
Histones package DNA in all eukaryotes and play key roles in regulating gene expression. Approximately 150 base pairs of DNA wraps around an octamer of core histones to form the nucleosome, the basic unit of chromatin... Histones package DNA in all eukaryotes and play key roles in regulating gene expression. Approximately 150 base pairs of DNA wraps around an octamer of core histones to form the nucleosome, the basic unit of chromatin. Linker histones compact chromatin further by binding to and neutralizing the charge of the DNA between nucleosomes. It is well established that chromatin packing is regulated by a complex pattern of posttranslational modifications (PTMs) to core histones, but linker histone function is less well understood. In this review, we describe the current understand- ing of the many roles that linker histones play in cellular processes, including gene regulation, cell division, and devel- opment, while putting the linker histone in the context of other nuclear proteins. Although intriguing roles for plant linker histones are beginning to emerge, much of our current understanding comes from work in animal systems. Many unanswered questions remain and additional work is required to fully elucidate the complex processes mediated by linker histones in plants. 展开更多
关键词 linker histone histone H1 CHROMATIN gene regulation development differentiation IMPRINTING posttrans-lational modifications DNA methylation high mobility group proteins.
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Transcription-Coupled Replacement of Histones:Degradation or Recycling? 被引量:1
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作者 Yu-Shan Chen Xiao-Bo Qiu 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2012年第11期575-580,共6页
Histone modifications are proposed to constitute a "histone code" for epigenetic regulation of gene expression. However, recent studies demonstrate that histones have to be disassembled from chromatin during transcr... Histone modifications are proposed to constitute a "histone code" for epigenetic regulation of gene expression. However, recent studies demonstrate that histones have to be disassembled from chromatin during transcription. Recent evidence, though not conclusive, suggests that histories might be degradable after being removed from chromatin during transcription. Degradation of overexpressed excessive histones, instead of native histones, has been shown to be dependent on proteasomes and ubiquitination. Since the 26S proteasome usually recognizes polyubiquitinated substrates, it is critical to demonstrate whether degradation of histones is mediated by polyubiquitination. Unexpectedly, there is almost no evidence that any ubiquitin ligase can promote polyubiquitination-dependent degradation of constitutive histones. Meanwhile, acetylation and phosphorylation are also associated with histone degradation. This review attempts to summarize the current knowledge on the transcription-coupled degradation of histones and its regulation by posttranslational protein modifications. 展开更多
关键词 Histone degradation Ubiquitin PROTEASOME UBIQUITINATION ACETYLATION Phosphorytation Gene activation TRANSCRIPTION
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Mechanism of cancer: Oncohistones in action 被引量:1
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作者 Lei Qiu Xiaoyan Hu +3 位作者 Qian Jing Xinyi Zeng Kui-Ming Chan Junhong Han 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2018年第5期227-236,共10页
Oncohistones are histones with high-frequency point mutations that are associated with tumorigenesis. Although each histone variant is encoded by multiple genes, a single mutation in one allele of one gene seems to ha... Oncohistones are histones with high-frequency point mutations that are associated with tumorigenesis. Although each histone variant is encoded by multiple genes, a single mutation in one allele of one gene seems to have a dominant effect over global histone H3 methylation level at the relevant amino acid residue. These oncohistones are highly tumor type specific. For example, H3K27M and H3G34V/R mutations occur only in pediatric brain cancers, whereas H3K36M and H3G34W/L have only been found in pediatric bone tumors. H1 mutations also seem to be exclusively linked to lymphomas. In this review, we discuss the occurrence, frequency and potential functional mechanisms of each oncohistone in tumorigenesis of its relevant cancer. We believe that further investigation into the mechanism regarding their tumor type specificity and cancer-related functions will shed new light on their application in cancer diagnosis and targeted therapy development. 展开更多
关键词 Oncohistone Histone modification TUMORIGENESIS Pediatric cancer
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The conformation alteration of mouse hepatic histones after reacting with nicotine in vitro
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作者 Xiaohong Wu Hongfang Sun Yuanfang Liu 《Chinese Science Bulletin》 SCIE EI CAS 2000年第9期825-830,共6页
UV differential spectroscopy, fluorescence spectroscopy and circular dichroism (CD) spectroscopy assays have been applied to studying the conformation alteration of mouse hepatic histones H1 and H3 after reacting with... UV differential spectroscopy, fluorescence spectroscopy and circular dichroism (CD) spectroscopy assays have been applied to studying the conformation alteration of mouse hepatic histones H1 and H3 after reacting with nicotine in vitro. The results indicate that their conformation changes from regular form to random form with the increasing reaction dose of nicotine. The adduction of nicotine or its metabolites with histones H1 and H3 accounts for the conformation alteration. Nicotine may affect the structure, function and expression of genes of chromosome by changing the conformation of histones. 展开更多
关键词 NICOTINE HISTONE CONFORMATION genotoxicity.
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Recent omics progress in nanobiotechnology for plant abiotic stress tolerance improvement 被引量:1
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作者 Lingling Chen Lan Zhu +7 位作者 Xiaohui Liu Lu Chen Han Zhou Huixin Ma Guilan Sun Ashadu Nyande Zhaohu Li Honghong Wu 《The Crop Journal》 SCIE CSCD 2024年第5期1274-1279,共6页
Use of nanomaterials(NMs)to improve plant abiotic stress tolerance(AST)is a hot topic in NM-enabled agriculture.Previous studies mainly focused on the physiological and biochemical responses of plants treated with NMs... Use of nanomaterials(NMs)to improve plant abiotic stress tolerance(AST)is a hot topic in NM-enabled agriculture.Previous studies mainly focused on the physiological and biochemical responses of plants treated with NMs under abiotic stress.To use NMs for improving plant AST,it is necessary to understand how they act on this tolerance at the omics and epigenetics levels.In this review,we summarized the knowledge of NM-improved abiotic stress tolerance in relation to omics(such as metabolic,transcriptomic,proteomic,and microRNA),DNA methylation,and histone modifications.Overall,NMs can improve plant abiotic stress tolerance through the modulation at omics and epigenetics levels. 展开更多
关键词 NANOMATERIALS OMICS Molecular mechanisms EPIGENETICS DNA methylation Histone modification
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Pig H3K4me3,H3K27ac,and gene expression profiles reveal reproductive tissue-specific activity of transposable elements 被引量:1
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作者 Tao Jiang Zhi-Min Zhou +6 位作者 Zi-Qi Ling Qing Zhang Zhong-Zi Wu Jia-Wen Yang Si-Yu Yang Bin Yang Lu-Sheng Huang 《Zoological Research》 SCIE CSCD 2024年第1期138-151,共14页
Regulatory sequences and transposable elements(TEs)account for a large proportion of the genomic sequences of species;however,their roles in gene transcription,especially tissue-specific expression,remain largely unkn... Regulatory sequences and transposable elements(TEs)account for a large proportion of the genomic sequences of species;however,their roles in gene transcription,especially tissue-specific expression,remain largely unknown.Pigs serve as an excellent animal model for studying genomic sequence biology due to the extensive diversity among their wild and domesticated populations.Here,we conducted an integrated analysis using H3K27ac ChIP-seq,H3K4me3 ChIP-seq,and RNA-seq data from 10 different tissues of seven fetuses and eight closely related adult pigs.We aimed to annotate the regulatory elements and TEs to elucidate their associations with histone modifications and mRNA expression across different tissues and developmental stages.Based on correlation analysis between mRNA expression and H3K27ac and H3K4me3 peak activity,results indicated that H3K27ac exhibited stronger associations with gene expression than H3K4me3.Furthermore,1.45%of TEs overlapped with either the H3K27ac or H3K4me3 peaks,with the majority displaying tissue-specific activity.Notably,a TE subfamily(LTR4C_SS),containing binding motifs for SIX1 and SIX4,showed specific enrichment in the H3K27ac peaks of the adult and fetal ovaries.RNA-seq analysis also revealed widespread expression of TEs in the exons or promoters of genes,including 4688 TE-containing transcripts with distinct development stage-specific and tissue-specific expression.Of note,1967 TE-containing transcripts were enriched in the testes.We identified a long terminal repeat(LTR),MLT1F1,acting as a testis-specific alternative promoter in SRPK2(a cell cycle-related protein kinase)in our pig dataset.This element was also conserved in humans and mice,suggesting either an ancient integration of TEs in genes specifically expressed in the testes or parallel evolutionary patterns.Collectively,our findings demonstrate that TEs are deeply embedded in the genome and exhibit important tissue-specific biological functions,particularly in the reproductive organs. 展开更多
关键词 Transposable elements PORCINE Histone modification Alternative promoter TE-containing transcript
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Repressing iron overload ameliorates central poststroke pain via the Hdac2-Kv1.2 axis in a rat model of hemorrhagic stroke 被引量:1
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作者 He Fang Mengjie Li +6 位作者 Jingchen Yang Shunping Ma Li Zhang Hongqi Yang Qiongyan Tang Jing Cao Weimin Yang 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第12期2708-2722,共15页
Thalamic hemorrhage can lead to the development of central post-stroke pain.Changes in histone acetylation levels,which are regulated by histone deacetylases,affect the excitability of neurons surrounding the hemorrha... Thalamic hemorrhage can lead to the development of central post-stroke pain.Changes in histone acetylation levels,which are regulated by histone deacetylases,affect the excitability of neurons surrounding the hemorrhagic area.However,the regulato ry mechanism of histone deacetylases in central post-stroke pain remains unclea r.Here,we show that iron overload leads to an increase in histone deacetylase 2expression in damaged ventral posterolateral nucleus neurons.Inhibiting this increase restored histone H3 acetylation in the Kcna2 promoter region of the voltage-dependent potassium(Kv)channel subunit gene in a rat model of central post-stroke pain,thereby increasing Kcna2expression and relieving central pain.However,in the absence of nerve injury,increasing histone deacetylase 2 expression decreased Kcna2expression,decreased Kv current,increased the excitability of neurons in the ventral posterolateral nucleus area,and led to neuropathic pain symptoms.Moreover,treatment with the iron chelator deferiprone effectively reduced iron overload in the ventral posterolateral nucleus after intracerebral hemorrhage,reversed histone deacetylase 2 upregulation and Kv1.2 downregulation,and alleviated mechanical hypersensitivity in central post-stroke pain rats.These results suggest that histone deacetylase 2 upregulation and Kv1.2 downregulation,mediated by iron overload,are important factors in central post-stroke pain pathogenesis and co uld se rve as new to rgets for central poststroke pain treatment. 展开更多
关键词 central post-stroke pain hemorrhagic stroke histone deacetylase iron overload voltage-gated potassium ion channel 1.2
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Targeting the chromatin structural changes of antitumor immunity
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作者 Nian-nian Li Deng-xing Lun +22 位作者 Ningning Gong Gang Meng Xin-ying Du He Wang Xiangxiang Bao Xin-yang Li Ji-wu Song Kewei Hu Lala Li Si-ying Li Wenbo Liu Wanping Zhu Yunlong Zhang Jikai Li Ting Yao Leming Mou Xiaoqing Han Furong Hao Yongcheng Hu Lin Liu Hongguang Zhu Yuyun Wu Bin Liu 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2024年第4期460-482,共23页
Epigenomic imbalance drives abnormal transcriptional processes,promoting the onset and progression of cancer.Although defective gene regulation generally affects carcinogenesis and tumor suppression networks,tumor imm... Epigenomic imbalance drives abnormal transcriptional processes,promoting the onset and progression of cancer.Although defective gene regulation generally affects carcinogenesis and tumor suppression networks,tumor immunogenicity and immune cells involved in antitumor responses may also be affected by epigenomic changes,which may have significant implications for the development and application of epigenetic therapy,cancer immunotherapy,and their combinations.Herein,we focus on the impact of epigenetic regulation on tumor immune cell function and the role of key abnormal epigenetic processes,DNA methylation,histone post-translational modification,and chromatin structure in tumor immunogenicity,and introduce these epigenetic research methods.We emphasize the value of small-molecule inhibitors of epigenetic modulators in enhancing antitumor immune responses and discuss the challenges of developing treatment plans that combine epigenetic therapy and immuno-therapy through the complex interaction between cancer epigenetics and cancer immunology. 展开更多
关键词 Antitumor immunity Chromatin structural Cancer epigenetics DNA methylation Histone modification CHEMOTHERAPY
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Epigenetic control on transcription of vernalization genes and whole-genome gene expression profile induced by vernalization in common wheat
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作者 Yunzhen Li Liujie Jin +4 位作者 Xinyu Liu Chao He Siteng Bi Sulaiman Saeed Wenhao Yan 《Plant Diversity》 SCIE CAS CSCD 2024年第3期386-394,共9页
Vernalization is necessary for winter wheat to flower.However,it is unclear whether vernalization is also required for spring wheat,which is frequently sown in fall,and what molecular mechanisms underlie the vernaliza... Vernalization is necessary for winter wheat to flower.However,it is unclear whether vernalization is also required for spring wheat,which is frequently sown in fall,and what molecular mechanisms underlie the vernalization response in wheat varieties.In this study,we examined the molecular mechanisms that regulate vernalization response in winter and spring wheat varieties.For this purpose,we determined how major vernalization genes(VRN1,VRN2,and VRN3)respond to vernalization in these varieties and whether modifications to histones play a role in changes in gene expression.We also identified genes that are differentially regulated in response to vernalization in winter and spring wheat varieties.We found that in winter wheat,but not in spring wheat,VRN1 expression decreases when returned to warm temperature following vernalization.This finding may be associated with differences between spring and winter wheat in the levels of tri-methylation of lysine 27 on histone H3(H3K27me3)and tri-methylation of lysine 4 on histone H3(H3K4me3)at the VRN1 gene.Analysis of winter wheat transcriptomes before and after vernalization revealed that vernalization influences the expression of several genes,including those involved in leucine catabolism,cysteine biosynthesis,and flavonoid biosynthesis.These findings provide new candidates for further study on the mechanism of vernalization regulation in wheat. 展开更多
关键词 WHEAT VERNALIZATION VRN1 Histone modification Regulate network
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Histone Acetyltransferase GCN5 Regulates Rice Growth and Development and Enhances Salt Tolerance
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作者 XUE Chao ZHAO Xinru +5 位作者 CHEN Xu CAI Xingjing HU Yingying LI Xiya ZHOU Yong GONG Zhiyun 《Rice science》 SCIE CSCD 2024年第6期688-699,I0015,共13页
Histone acetylation is indispensable in the process of crops resisting abiotic stress,which is jointly catalyzed by histone acetyltransferases and deacetylases.However,the mechanism of regulating salt tolerance throug... Histone acetylation is indispensable in the process of crops resisting abiotic stress,which is jointly catalyzed by histone acetyltransferases and deacetylases.However,the mechanism of regulating salt tolerance through histone acetyltransferase GCN5 is still unclear.We revealed that GCN5 can catalyze the acetylation of canonical H3 and H4 lysine residues both in vivo and in vitro in rice.The knockout mutants and RNA interference lines of Os GCN5 exhibited severe growth inhibition and defects in salt tolerance,while the over-expression of Os GCN5 enhanced the salt tolerance of rice seedlings,indicating that Os GCN5 positively regulated the response of rice to salt stress.RNA-seq analysis suggested Os GCN5 may positively regulate the salt tolerance of rice by inhibiting the expression of Os HKT2;1 or other salt-responsive genes.Taken together,our study indicated that GCN5 plays a key role in enhancing salt tolerance in rice. 展开更多
关键词 GCN5 histone acetyltransferase salt tolerance Oryza sativa
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