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Hmo1:A versatile member of the high mobility group box family of chromosomal architecture proteins
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作者 Xin Bi 《World Journal of Biological Chemistry》 2024年第1期1-10,共10页
Eukaryotic chromatin consisting of nucleosomes connected by linker DNA is organized into higher order structures,which is facilitated by linker histone H1.Formation of chromatin compacts and protects the genome,but al... Eukaryotic chromatin consisting of nucleosomes connected by linker DNA is organized into higher order structures,which is facilitated by linker histone H1.Formation of chromatin compacts and protects the genome,but also hinders DNA transactions.Cells have evolved mechanisms to modify/remodel chromatin resulting in chromatin states suitable for genome functions.The high mobility group box(HMGB)proteins are non-histone chromatin architectural factors characterized by one or more HMGB motifs that bind DNA in a sequence nonspecific fashion.They play a major role in chromatin dynamics.The Saccharomyces cerevisiae(yeast hereafter)HMGB protein Hmo1 contains two HMGB motifs.However,unlike a canonical HMGB protein that has an acidic C-terminus,Hmo1 ends with a lysine rich,basic,C-terminus,resembling linker histone H1.Hmo1 exhibits characteristics of both HMGB proteins and linker histones in its multiple functions.For instance,Hmo1 promotes transcription by RNA polymerases I and II like canonical HMGB proteins but makes chromatin more compact/stable like linker histones.Recent studies have demonstrated that Hmo1 destabilizes/disrupts nucleosome similarly as other HMGB proteins in vitro and acts to maintain a common topological architecture of genes in yeast genome.This minireview reviews the functions of Hmo1 and the underlying mechanisms,highlighting recent discoveries. 展开更多
关键词 Hmo1 High mobility group box proteins CHROMATIN Chromatin remodeling Gene regulation Ribosomal DNA Ribosomal protein genes DNA damage response Linker histone
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Expression and Purification of Arabidopsis High Mobility Group B Protein Gene At2G34450 in Pichia pastoris
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作者 冀芦沙 肖庆振 +1 位作者 王曰文 王洪霞 《Agricultural Science & Technology》 CAS 2012年第4期731-734,共4页
[Objective] The aim was to study the expression of Arabidopsis gene A/2G34450 in Pichia pastoris and to obtain recombinant Arabidopsis HMGB protein. [Method] The At2G34450 gene was cloned into yeast expression vector ... [Objective] The aim was to study the expression of Arabidopsis gene A/2G34450 in Pichia pastoris and to obtain recombinant Arabidopsis HMGB protein. [Method] The At2G34450 gene was cloned into yeast expression vector pPIC9K containing AOXl promoter and the sequences of secreting α-signal peptides. Recombinant plasmid was linearized by Sal l and transformed into P. pastoris GSl15 competent cells by electroporation. Positive integrated clones were screened out, and the At2G34450 protein was expressed under the induction of methanol. [Result] The At2G34450 protein was expressed in yeast medium through methanol induction. SDS-PAGE results showed that recombination product was At2G34450 protein. [Conclusion] At2G34450 protein was successfully expressed in the P. pastoris system for the first time, which paves a direct path to further research on the functions of HMGB family members. 展开更多
关键词 ARABIDOPSIS High mobility group protein Pichia pastoris Eukaryotic expression
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The Expression and Functional Analysis of the Gene At2G34450 in High Mobility Group B Proteins from Arabidopsis thaliana
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作者 冀芦沙 贺立龙 +1 位作者 王红霞 郭尚敬 《Agricultural Science & Technology》 CAS 2010年第7期13-16,共4页
[Objective]To better understand the functions of High Mobility Group B (HMGB) proteins in the transcriptional regulation of plant stress responses.[Method]We cloned the At2G33450 gene encoding At2G34450 protein in A... [Objective]To better understand the functions of High Mobility Group B (HMGB) proteins in the transcriptional regulation of plant stress responses.[Method]We cloned the At2G33450 gene encoding At2G34450 protein in Arabidopsis thaliana.Binary vectors carrying the above gene were transformed into Arabidopsis to detect the influences of environmental stimuli to transgenic Arabidopsis.[Result] Under salt or drought stress the transgenic Arabidopsis plants over-expressed At2G33450 displayed retarded germination and subsequent growth compared with wild-type plants.[Conclusion]Our results provide a novel basis for understanding the biological functions of HMGB protein family members that differently affect germination and seedling growth of Arabidopsis plants under various stress conditions. 展开更多
关键词 Abiotic stress ARABIDOPSIS High mobility group protein Transgenic plant
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High mobility group box-1 protein inhibits regulatory T cell immune activity in liver failure in patients with chronic hepatitis B 被引量:23
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作者 Wang, Lu-Wen Chen, Hui Gong, Zuo-Jiong 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2010年第5期499-507,共9页
BACKGROUND: Liver failure in chronic hepatitis B (CHB) patients is a severe, life-threatening condition. Intestinal endotoxemia plays a significant role in the progress to liver failure. High mobility group box-1 (HMG... BACKGROUND: Liver failure in chronic hepatitis B (CHB) patients is a severe, life-threatening condition. Intestinal endotoxemia plays a significant role in the progress to liver failure. High mobility group box-1 (HMGB1) protein is involved in the process of endotoxemia. Regulatory T (Treg) cells maintain immune tolerance and contribute to the immunological hyporesponsiveness against HBV infection. However, the roles of HMGB1 and Treg cells in the pathogenesis of liver failure in CHB patients, and whether HMGB1 affects the immune activity of Treg cells are poorly known at present, and so were explored in this study. METHODS: The levels of HMGB1 expression were detected by ELISA, real-time RT-PCR, and Western blotting, and the percentage of CD4(+)CD25(+)CD127(low) Treg cells among CD4(+) cells was detected by flow cytometry in liver failure patients with chronic HBV infection, CHB patients, and healthy controls. Then, CD4(+)CD25(+)CD127(low) Treg cells isolated from the peripheral blood mononuclear cells from CHB patients were stimulated with HMGB1 at different concentrations or at various intervals. The effect of HMGB1 on the immune activity of Treg cells was assessed by a suppression assay of the allogeneic mixed lymphocyte response. The levels of forkhead box P3 (Foxp3) expression in Treg cells treated with HMGB1 were detected by RT-PCR and Western blotting. RESULTS: A higher level of HMGB1 expression and a lower percentage of Treg cells within the population of CIA(+) cells were found in liver failure patients than in CHB patients (82.6+/-20.1 mu g/L vs. 34.2+/-13.7 mu g/L; 4.55+/-1.34% vs. 9.52+/-3.89%, respectively). The immune activity of Treg cells was significantly weakened and the levels of Foxp3 expression were reduced in a dose- or time-dependent manner when Treg cells were stimulated with HMGB1 in vitro. CONCLUSIONS: The high level of HMGB1 and the low percentage of Treg cells play an important role in the pathogenesis of liver failure in patients with chronic HBV infection. Moreover, HMGB1 can weaken the immune activity of Treg cells. It is suggested that effectively inhibiting HMGB1 expression could be a feasible way to treat liver failure by suppressing endotoxemia and enhancing Treg cell activity. 展开更多
关键词 high mobility group box-1 protein regulatory T cells chronic hepatitis B liver failure
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Effect on proliferation and apoptosis of retinoblastoma cell by RNA inhibiting high mobility group protein box-1 expression 被引量:3
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作者 Li-Lun Wang Yan-Qin Feng Yu-Hong Cheng 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2017年第1期30-34,共5页
AIM: To investigate the effect of high mobility group protein box-1 (HMGB1) siRNA on proliferation and apoptosis of retinoblastoma (Rb) cells.METHODS: The expression of HMGB1 in Rb cells were detected by real-ti... AIM: To investigate the effect of high mobility group protein box-1 (HMGB1) siRNA on proliferation and apoptosis of retinoblastoma (Rb) cells.METHODS: The expression of HMGB1 in Rb cells were detected by real-time polymerase chain reaction (RT-PCR) and Western blot. Chemically synthesized HMGB1 siRNA was transfected into Y79 cells. The inhibitory rate was also examined by RT-PCR and Western blot. After HMGB1 siRNA transfection, the cell proliferation was analyzed by MTT, and cell apoptosis was detected by Caspase-3 active detection kit. Cell cycle distribution and apoptosis were detected by flow cytometry. RESULTS: The expression of HMGB1 significantly elevated in Rb cells (P〈0.01). After transfected by siRNA, the HMGB1 protein level of Y79 cells was significantly reduced (P〈0.01). After siRNA interference HMGB1, the proportion of proliferating cells reduced, and the proportion of quiescent cells increased (P〈0.05). In addition, apoptosis rate of Y79 cells increased from 2.03% to 9.10% after interfering with HMGB1 siRNA (P〈0.05).CONCLUSION: Specific HMGB1 siRNA can inhibit the expression of HMGB1. The effect may be attributed to inhibit the proliferation and promote cell apoptosis. 展开更多
关键词 RETINOBLASTOMA high mobility group protein box-l PROLIFERATION APOPTOSIS
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Novel insights for high mobility group box 1 proteinmediated cellular immune response in sepsis:A systemic review 被引量:20
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作者 Li-feng Huang Yong-ming Yao Zhi-yong Sheng 《World Journal of Emergency Medicine》 CAS 2012年第3期165-171,共7页
High mobility group box 1 protein (HMGB1) is a highly conserved, ubiquitous protein in the nuclei and cytoplasm of nearly all cell types. HMGB1 is secreted into the extracellular milieu and acts as a proinflammatory... High mobility group box 1 protein (HMGB1) is a highly conserved, ubiquitous protein in the nuclei and cytoplasm of nearly all cell types. HMGB1 is secreted into the extracellular milieu and acts as a proinflammatory cytokine. In this article we reviewed briefly the cellular immune response mediated by HMGB1 in inflammation and sepsis. This systemic review is mainly based on our own work and other related reports HMGB1 can actively affect the immune functions of many types of cells including T lymphocytes, regulatory T cells (Tregs), dendritic cells (DCs), macrophages, and natural killer cells (NK cells). Various cellular responses can be mediated by HMGB1 which binds to cell-surface receptors [e.g., the receptor for advanced glycation end products (RAGE), Toll-like receptor (TLR)2, and TLR4]. Anti-HMGB1 treatment, such as anti-HMGB1 polyclonal or monoclonal antibodies, inhibitors (e.g., ethyl pyruvate) and antagonists (e.g., A box), can protect against sepsis lethality and give a wider window for the treatment opportunity. HMGB1 is an attractive target for the development of new therapeutic strategies in the treatment of patients with septic complications. 展开更多
关键词 High mobility group box 1 protein SEPSIS Immunological effect CYTOKINE Signal transduction
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Inflammatory response and immune regulation of high mobility group box-1 protein in treatment of sepsis 被引量:7
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作者 Qing-yang Liu Yong-ming Yao 《World Journal of Emergency Medicine》 SCIE CAS 2010年第2期93-98,共6页
Sepsis is an infection induced systemic inflammatory response syndrome and is a major cause of morbidity as well as mortality in intensive care units. A growing body of evidence suggests that the activation of a proin... Sepsis is an infection induced systemic inflammatory response syndrome and is a major cause of morbidity as well as mortality in intensive care units. A growing body of evidence suggests that the activation of a proinflammatory cascade is responsible for the development of immune dysfunction, susceptibility to severe sepsis and septic shock. The present theories of sepsis as a dysregulated inflammatory response and immune function, as manifested by excessive release of inflammatory mediators such as high mobility group box 1 protein (HMGB1), are supported by increasing studies employing animal models and clinical observations of sepsis. HMGB1, originally described as a DNA-binding protein and released passively by necrotic cells and actively by macrophages/monocytes, has been discovered to be one of essential cytokines that mediates the response to infection, injury and inflammation. A growing number of studies still focus on the inflammation-regulatory function and its contribution to infectious and inflammatory disorders, recent data suggest that HMGB1 formation can also markedly influence the host cell-mediated immunity, including T lymphocytes and macrophages. Here we review emerging evidence that support extracellular HMGB1 as a late mediator of septic complications, and discuss the therapeutic potential of several HMGBl-targeting agents in experimental sepsis. In addition, with the development of traditional Chinese medicine in recent years, it has been proven that traditional Chinese herbal materials and their extracts have remarkable effective in treating severe sepsis. In this review, we therefore provide some new concepts of HMGBl-targeted Chinese herbal therapies in sepsis. 展开更多
关键词 SEPSIS Inflammatory mediators High mobility group box 1 protein
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High mobility group box 1 protein(HMGB1)as an immune-modulating factor for polarization of human T lymphocytes 被引量:6
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作者 Lifeng Huang Yongming Yao +3 位作者 Haidong Meng Xiaodong Zhao Ning Dong Yan Yu 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2008年第2期117-122,共6页
Objective This study was performed to investigate the effect of high mobility group box-1 protein(HMGB1)on immune function of human T lymphocytes in vitro and explore its potential role in cell-mediated immune dysfunc... Objective This study was performed to investigate the effect of high mobility group box-1 protein(HMGB1)on immune function of human T lymphocytes in vitro and explore its potential role in cell-mediated immune dysfunction.Methods Fresh blood was obtained from healthy adult volunteers and peripheral blood mononuclear cells(PBMCs)were isolated,then rhHMGB1 was added to PBMCs.Four-color flow cytometric(FCM)analysis was used for the measurement of intracellular cytokine including interleukin IL-4 and interferon IFN-?ELISA kits were employed for the determination of IL-2 and sIL-2R protein levels in cell culture supernatants.Results(1)Different stimulating time and dosage of rhHMGB1 did not alter the number of IFN-αpositive cells(Th1).rhHMGB1 stimulation provoked a dose-dependent and time-dependent increase in Th2 subset and decrease in ratio of Th1 to Th2.(2)Compared with the untreated cells,when the cells were coincubated with rhHMGB1(10-100ng/ml)for 12 hrs,protein release of IL-2 and sIL-2R were significantly up-regulated.At 48 hrs,in contrast,protein production was relatively lower in cells after exposure to 100-1000 ng/ml rhHMGB1.Conclusions These findings demonstrated that HMGB1 has a dual influence on immune functions of human T lymphocytes. 展开更多
关键词 High mobility group box-1 protein IMMUNITY T lymphocytes TH1/TH2
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Epigenetic Repression of SATB1 by Polycomb Group Protein EZH2 in Epithelial Cells 被引量:1
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作者 Chih-chuan Liang 《Chinese Medical Sciences Journal》 CAS CSCD 2010年第4期199-205,共7页
Objective To study the regulatory mechanism of SATB1 repression in cells other than T cells or erythroid cells, which have high expression level of SATB1. Methods HeLa epithelial cells were treated with either histone... Objective To study the regulatory mechanism of SATB1 repression in cells other than T cells or erythroid cells, which have high expression level of SATB1. Methods HeLa epithelial cells were treated with either histone deacetylase inhibitor (HDACi) trichostatin A (TSA) or DNA methylation inhibitor 5-Aza-C before detecting SATB1 expression. Luciferase reporter system was applied to measure effects of EZH2 on SATB1 promoter activity. Over-expression or knockdown of EZH2 and subsequent quantitative reverse transcription-polymerase chain reaction were performed to determine the effect of this Polycomb group protein on SATB1 transcription. Chromatin immunoprecipitation (ChIP) assay was applied to measure enrichment of EZH2 and trimethylated H3K27 (H3K27me3) at SATB1 promoter in HeLa cells. K562 cells and Jurkat cells, both having high-level expression of SATB1, were used in the ChIP experiment as controls. Results Both TSA and 5-Aza-C increased SATB1 expression in HeLa cells. Over-expression of EZH2 reduced promoter activity as well as the mRNA level of SATB1, while knockdown of EZH2 apparently enhanced SATB1 expression in HeLa cells but not in K562 cells and Jurkat cells. ChIP assay results suggested that epigenetic silencing of SATB1 by EZH2 in HeLa cells was mediated by trimethylation modification of H3K27. In contrast, enrichment of EZH2 and H3K27me3 was not detected within proximal promoter region of SATB1 in either K562 or Jurkat cells. Conclusion SATB1 is a bona fide EZH2 target gene in HeLa cells and the repression of SATB1 by EZH2 may be mediated by trimethylation modification on H3K27. 展开更多
关键词 SATB 1 EZH2 Polycomb group protein gene silencing trimethylated H3K27
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High-mobility group box 1 protein and its role in severe acute pancreatitis 被引量:27
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作者 Xiao Shen Wei-Qin Li 《World Journal of Gastroenterology》 SCIE CAS 2015年第5期1424-1435,共12页
The high mobility group box 1(HMGB1),which belongs to the subfamily of HMG-1/-2,is a highly conserved single peptide chain consisting of 215 amino acid residues with a molecular weight of approximately 24894 Da.HMGB1 ... The high mobility group box 1(HMGB1),which belongs to the subfamily of HMG-1/-2,is a highly conserved single peptide chain consisting of 215 amino acid residues with a molecular weight of approximately 24894 Da.HMGB1 is a ubiquitous nuclear protein in mammals and plays a vital role in inflammatory diseases.Acute pancreatitis is one of the most common causes of acute abdominal pain with a poor prognosis.Acute pancreatitis is an acute inflammatory process of the pancreas(duration of less than six months),for which the severe form is called severe acute pancreatitis(SAP).More and more studies have shown that HMGB1 has a bidirectional effect in the pathogenesis of SAP.Extracellular HMGB1 can aggravate the pancreatic inflammatory process,whereas intracellular HMGB1 has a protective effect against pancreatitis.The mechanism of HMGB1 is multiple,mainly through the nuclear factor-κB pathway.Receptors for advanced glycation endproducts and toll-like receptors(TLR),especially TLR-2 and TLR-4,are two major types of receptors mediating the inflammatory process triggered by HMGB1 and may be also the main mediators in the pathogenesis of SAP.HMGB1 inhibitors,such as ethyl pyruvate,pyrrolidine dithiocarbamate and Scolopendra subspinipes mutilans,can decrease the level of extracellular HMGB1 and are the promising targets in the treatment of SAP. 展开更多
关键词 High MOBILITY group BOX 1 protein INHIBITORS Infla
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High mobility group protein 1: A collaborator in nucleosome dynamics and estrogen-responsive gene expression 被引量:4
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作者 William M Scovell 《World Journal of Biological Chemistry》 CAS 2016年第2期206-222,共17页
High mobility group protein 1(HMGB1) is a multifunctional protein that interacts with DNA and chromatin to influence the regulation of transcription, DNA replication and repair and recombination. We show that HMGB1 al... High mobility group protein 1(HMGB1) is a multifunctional protein that interacts with DNA and chromatin to influence the regulation of transcription, DNA replication and repair and recombination. We show that HMGB1 alters the structure and stability of the canonical nucleosome(N) in a nonenzymatic,adenosine triphosphate-independent manner. As a result, the canonical nucleosome is converted to two stable, physically distinct nucleosome conformers. Although estrogen receptor(ER) does not bind to its consensus estrogen response element within a nucleosome, HMGB1 restructures the nucleosome to facilitate strong ER binding. The isolated HMGB1-restructured nucleosomes(N' and N'') remain stable and exhibit a number of characteristics that are distinctly different from the canonical nucleosome. These findings complement previous studies that showed(1) HMGB1 stimulates in vivo transcriptional activation at estrogen response elements and(2) knock down of HMGB1 expression by siR NA precipitously reduced transcriptional activation. The findings indicate that a major facet of the mechanism of HMGB1 action involves a restructuring of aspects of the nucleosome that appear to relax structural constraints within the nucleosome. The findings are extended to reveal the differences between ER and the other steroid hormone receptors. A working proposal outlines mechanisms that highlight the multiple facets that HMGB1 may utilize in restructuring the nucleosome. 展开更多
关键词 NUCLEOSOME DYNAMICS ESTROGEN receptor High mobility group protein 1 Conformational DYNAMICS Energy LANDSCAPE
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Scolopendra subspinipes mutilans protected the ceruleininduced acute pancreatitis by inhibiting high-mobility group box protein-1 被引量:7
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作者 Il-Joo Jo Gi-Sang Bae +7 位作者 Kyoung-Chel Park Sun Bok Choi Won-Seok Jung Su-Young Jung Jung-Hee Cho Mee-Ok Choi Ho-Joon Song Sung-Joo Park 《World Journal of Gastroenterology》 SCIE CAS 2013年第10期1551-1562,共12页
AIM:To evaluate the inhibitory effects of Scolopendra subspinipes mutilans(SSM) on cerulein-induced acute pancreatitis(AP) in a mouse model.METHODS:SSM water extract(0.1,0.5,or 1 g/kg) was administrated intraperitonea... AIM:To evaluate the inhibitory effects of Scolopendra subspinipes mutilans(SSM) on cerulein-induced acute pancreatitis(AP) in a mouse model.METHODS:SSM water extract(0.1,0.5,or 1 g/kg) was administrated intraperitoneally 1 h prior to the first injection of cerulein.Once AP developed,the stable cholecystokinin analogue,cerulein was injected hourly,over a 6 h period.Blood samples were taken 6 h later to determine serum amylase,lipase,and cytokine levels.The pancreas and lungs were rapidly removed for morphological examination,myeloperoxidase assay,and real-time reverse transcription polymerase chain reaction.To specify the role of SSM in pancreatitis,the pancreatic acinar cells were isolated using collagenase method.Then the cells were pre-treated with SSM,then stimulated with cerulein.The cell viability,cytokine productions and high-mobility group box protein-1(HMGB-1) were measured.Furthermore,the regulating mechanisms of SSM action were evaluated.RESULTS:The administration of SSM significantly attenuated the severity of pancreatitis and pancreatitis associated lung injury,as was shown by the reduction in pancreatic edema,neutrophil infiltration,vacuolization and necrosis.SSM treatment also reduced pancreatic weight/body weight ratio,serum amylase,lipase and cytokine levels,and mRNA expression of multiple inflammatory mediators such as tumor necrosis factor-α and interleukin-1β.In addition,treatment with SSM inhibited HMGB-1 expression in the pancreas during AP.In accordance with in vivo data,SSM inhibited the cerulein-induced acinar cell death,cytokine,and HMGB-1 release.SSM also inhibited the activation of c-Jun NH2-terminal kinase,p38 and nuclear factor(NF)-κB.CONCLUSION:These results suggest that SSM plays a protective role during the development of AP and pancreatitis associated lung injury via deactivating c-Jun NH2-terminal kinase,p38 and NF-κB. 展开更多
关键词 SCOLOPENDRA subspinipes mutilans CYTOKINES Acute PANCREATITIS HIGH-MOBILITY group box protein-1
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Effect of high mobility group box-1 protein on immune cells and its regulatory mechanism 被引量:1
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作者 Ying-yi LUAN Feng-hua YAO +3 位作者 Qing-hong ZHANG Xiao-mei ZHU Ning DONG Yong-ming YAO 《中国应用生理学杂志》 CAS CSCD 2012年第6期548-554,共7页
High mobility group box-1 protein(HMGB1),which is a nuclear protein,participates in chromatin architecture and transcriptional regulation.When released from cells,HMGB1 also plays a well-established role as a pro-infl... High mobility group box-1 protein(HMGB1),which is a nuclear protein,participates in chromatin architecture and transcriptional regulation.When released from cells,HMGB1 also plays a well-established role as a pro-inflammatory mediator during innate immune responses to injury.In the initial stage of injury,there is a release of large quantities of early pro-inflammatory mediators to initiate or perpetuate immune responses against pathogens,but this pro-inflammatory period is transient,and it is followed by a prolonged period of immune suppression.At present,several lines of evidences have suggested that HMGB1 is a late cytokine provoking delayed endotoxin morbidity,which may enhance the production of early proinflammatory mediators,and it can contribute potently to the activation of different immune cells and play a role in the development of host cell-mediated immunity.The biology of HMGB1 has been extensively studied as a pro-inflammatory cytokine of systemic inflammation,however,this review will attempt to provide a summary of the effects of HMGB1 on different immune cells and its regulatory mechanism in acute insults. 展开更多
关键词 免疫细胞 调控机制 核蛋白 迁移率 HMGB1 炎症介质 基因转录调控 免疫反应
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Bmi-1,a Polycomb Group Protein,Plays an Essential Role in Tumorigenesis and Metastasis
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作者 Libing SONG Jun LI Wenting LIAO Yan FENG Wanli LIU Yixin ZENG Musheng ZENG 《中国肺癌杂志》 CAS 2009年第6期I0063-I0063,共1页
Dysregulation of polycomb group protein Bmi-1 expression has been linked with an invasive phenotype of certain human cancers and poor prognosis of patients; however, the underlying mechanisms are
关键词 肺癌 医学 治疗 疗效
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Clinical signification of high-mobility group box 1protein(HMGB1) expression in infiltrating ductalcarcinoma breast tissue
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作者 Baoping Chang Xiao Wang +5 位作者 Songsou Gao Bianfeng Zhao Wanli Wang Shaohua Yang Qian Chu Shiying Yu 《The Chinese-German Journal of Clinical Oncology》 CAS 2014年第5期215-219,共5页
Objective: Exploring the clinical signification of high-mobility group box 1 protein(HMGB1) expression in infiltrating ductal carcinoma(IDC) breast tissue. Methods: The expression of HMGB1 protein in IDC breast tissue... Objective: Exploring the clinical signification of high-mobility group box 1 protein(HMGB1) expression in infiltrating ductal carcinoma(IDC) breast tissue. Methods: The expression of HMGB1 protein in IDC breast tissue was detected by immunohistochemistry, and the relations among size of tumour, lymph node metastasis, clinical staging, estrogen receptor(ER), progesterone receptor(PR) and human epidermal growth factor receptor 2(HER-2) were also analyzed. Results: Fortysix cases out of 60 cases of IDC breast tissue showed positive or strong positive HMGB1 expression(76.67%), statistical significance was observed between HMGB1 expression with clinical staging(P < 0.01), lymph node metastasis(P < 0.01), breast cancer ER(P < 0.05) and HER-2(P < 0.05), however same conclusion can not be drawn between HMGB1 with either size of tumour or PR expression(P > 0.05) in IDC breast tissue. Spearman analysis showed negative correlation between HMGB1 expression and ER, and positive correlation between HMGB1 expression and clinical staging, lymph node metastasis together with HER-2. Conclusion: It's promising that HMGB1 expression in IDC tissue can be one of biological indicators of poor prognosis. 展开更多
关键词 infiltrating ductal carcinoma (IDC) high-mobility group box 1 protein (HMGB1) clinical staging lymph node estrogen receptor (ER) human epidermal growth factor receptor 2 (HER-2)
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Relationship of plasma homocysteine, soluble intercellular adhesion molecule-1, high mobility group box 1 protein with carotid intima-media thickness in elderly patients with type 2 diabetes mellitus
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作者 Zhijie Cai Jun Xue +4 位作者 Xiaohui Ma Peifeng Chen Biao Ge Yuying Zhang Zhihui Dong 《Discussion of Clinical Cases》 2022年第1期9-12,共4页
Objective:To explore the relationship of plasma homocysteine(Hcy),soluble intercellular adhesion molecule-1(sICAM-1)and high mobility group box 1 protein(HMGB1)with carotid intima-media thickness(c-IMT)in elderly pati... Objective:To explore the relationship of plasma homocysteine(Hcy),soluble intercellular adhesion molecule-1(sICAM-1)and high mobility group box 1 protein(HMGB1)with carotid intima-media thickness(c-IMT)in elderly patients with type 2 diabetes mellitus.Methods:A total of 100 elderly patients who were diagnosed as type 2 diabetes mellitus in Baogang Hospital of Inner Mongolia from June 2017 to May 2020 were chosen as research objects.According to c-IMT,they were divided into the normal group(n=35),the mild to moderate group(n=41)and the severe group(n=24).The expression levels of plasma Hcy,sICAM-1 and HMGB1 were compared between groups respectively.Pearson’s correlation coefficient was used to analyze the relationship of plasma Hcy,sICAM-1,HMGB1 with c-IMT.Results:The comparison in plasma Hcy,sICAM-1,HMGB1 and c-IMT among the three groups of patients was of statistical significance(p<.05).The results of correlation analysis showed that the expression levels of plasma Hcy,sICAM-1 and HMGB1 were positively correlated with c-IMT in elderly patients with type 2 diabetes mellitus(r=.627,.598,.614;p<.05).Conclusions:The expression levels of plasma Hcy,sICAM-1 and HMGB1 are abnormally increased in elderly patients with type 2 diabetes mellitus,and related to c-IMT,which can provide a strong evidence for clinical diagnosis and treatment by detecting their levels in clinical practice. 展开更多
关键词 Type 2 diabetes mellitus Carotid intima-media thickness HOMOCYSTEINE Soluble intercellular adhesion molecule-1 High mobility group box 1 protein
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Assessment of Sulf hydryl Group in Individual Rat Lens Protein Subunits During Galactose Cataract Development
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作者 HaroldI.Calvin S.C.JosephFu 《眼科学报》 1994年第1期21-26,共6页
A specific reagent DACM [N-( 7-Dimethylamino-4-methyl-3-coumarinyl) maleimide] is used to study the -SH groups in lens proteins of normal and galactose cataractous rats. DACM when reacts readily with -SH groups form s... A specific reagent DACM [N-( 7-Dimethylamino-4-methyl-3-coumarinyl) maleimide] is used to study the -SH groups in lens proteins of normal and galactose cataractous rats. DACM when reacts readily with -SH groups form strong fluorescent adducts. The two -dimensional electrophoresis with DACM pre-labeled proteins is a simple and sensitive method for detecting -SH groups of protein subunit. In the present study, based on IEF/SDS-PAGE electrophoretically characterized soluble crystallins, describes specific ... 展开更多
关键词 SH group DACM pre-labeled protein-labeled protein GEL-ELECTROPHORESIS fluorrescence CATARACT
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血清AQP4、HMGB1、FGL2水平联合颅内压和脑组织氧分压监测在创伤性脑损伤患者预后中的价值
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作者 王文 郑从波 +3 位作者 胡芳宝 窦红杰 凌林 王德强 《疑难病杂志》 2025年第1期29-34,共6页
目的探讨血清通道蛋白4(AQP4)、高迁移率族蛋白B1(HMGB1)、纤维蛋白原样蛋白2(FGL2)水平联合颅内压和脑组织氧分压(PbtO_(2))监测在创伤性脑损伤(TBI)患者预后中的价值。方法选取2022年5月—2024年5月上海交通大学附属第六人民医院南院... 目的探讨血清通道蛋白4(AQP4)、高迁移率族蛋白B1(HMGB1)、纤维蛋白原样蛋白2(FGL2)水平联合颅内压和脑组织氧分压(PbtO_(2))监测在创伤性脑损伤(TBI)患者预后中的价值。方法选取2022年5月—2024年5月上海交通大学附属第六人民医院南院/上海市奉贤区中心医院重症医学科诊治的TBI患者128例为研究对象,根据患者治疗后随访3个月预后情况,将其分为预后不良组(n=38)、预后良好组(n=90)。采用ELISA法检测血清AQP4、HMGB1、FGL2水平;Spearman法分析TBI不同预后患者颅内压、PbtO_(2)、血清AQP4、HMGB1、FGL2与格拉斯哥昏迷量表(GCS)评分的相关性;运用ROC曲线分析颅内压、PbtO_(2)联合血清AQP4、HMGB1、FGL2对TBI患者预后的预测价值。结果预后不良组患者颅内压高于预后良好组,GCS评分、PbtO_(2)值显著低于预后良好组(t/P=7.491/<0.001、9.882/<0.001、7.215/<0.001)。预后不良组血清AQP4、HMGB1、FGL2水平明显高于预后良好组(t/P=7.106/<0.001、7.642/<0.001、7.383/<0.001);患者PbtO_(2)与GCS评分呈显著正相关(r/P=0.523/<0.001),而颅内压、血清AQP4、HMGB1、FGL2与GCS评分呈显著负相关(r/P=-0.515/<0.001、-0.492/<0.001、-0.617/<0.001、-0.569/<0.001);血清AQP4、HMGB1、FGL2、颅内压、PbtO_(2)及五者联合预测TBI患者预后的曲线下面积(AUC)分别为0.882、0.876、0.817、0.825、0.756、0.969,五者联合优于各自单独预测TBI患者预后的价值(Z/P=2.803/0.005、2.769/0.006、3.543/<0.001、3.269/0.001、3.956/<0.001)。结论TBI患者颅内压、血清AQP4、HMGB1、FGL2水平显著升高,PbtO_(2)显著降低,与患者预后有着紧密联系,联合检测对TBI患者预后有更高的预测价值。 展开更多
关键词 创伤性脑损伤 脑组织氧分压 通道蛋白4 高迁移率族蛋白B1 纤维蛋白原样蛋白2 预后
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Polycomb Group蛋白复合体与干细胞的发育调控 被引量:1
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作者 黄冰洋 潘晓燕 +3 位作者 李质馨 王正朝 于永生 窦肇华 《中国医学科学院学报》 CAS CSCD 北大核心 2012年第3期281-285,共5页
Polycomb group(PcG)蛋白是表观遗传调控因子中一个非常重要的家族,参与维持特定基因的沉默,在调控干细胞增殖与分化的过程中起着非常重要的作用。PcG蛋白可通过形成不同的蛋白复合物引起不同的染色质修饰来调控干细胞的生命活动,其复... Polycomb group(PcG)蛋白是表观遗传调控因子中一个非常重要的家族,参与维持特定基因的沉默,在调控干细胞增殖与分化的过程中起着非常重要的作用。PcG蛋白可通过形成不同的蛋白复合物引起不同的染色质修饰来调控干细胞的生命活动,其复合物主要包括两个重要的表观遗传调控因子:PRC1(polycomb repressive complex 1)和PRC2(polycomb repressive complex 2)。为了阐明PcG蛋白在干细胞增殖与分化中的调控作用,本文分别从PcG蛋白复合体的组成、在靶基因中的定位、募集和在干细胞发育中的调控等方面进行了综述,旨在为进一步研究干细胞的发育调控机制提供理论依据。 展开更多
关键词 POLYCOMB group蛋白 干细胞 基因沉默 表观遗传修饰
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基于HMGB1介导的肺动脉平滑肌细胞焦亡探讨复方葶苈子汤治疗COPD-PH的作用机制
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作者 伍新诚 刘雨 柏正平 《辽宁中医药大学学报》 CAS 2025年第1期12-21,共10页
目的研究高迁移率族蛋白B1(high mobility group box 1,HMGB1)介导的肺动脉平滑肌细胞焦亡对慢性阻塞性肺疾病相关性肺动脉高压(chronic obstructive pulmonary disease-associated pulmonary hypertension,COPD-PH)形成的影响,及复方... 目的研究高迁移率族蛋白B1(high mobility group box 1,HMGB1)介导的肺动脉平滑肌细胞焦亡对慢性阻塞性肺疾病相关性肺动脉高压(chronic obstructive pulmonary disease-associated pulmonary hypertension,COPD-PH)形成的影响,及复方葶苈子汤的干预机制。方法以CCK-8法检测大鼠肺动脉平滑肌细胞(pulmonary arterial smooth muscle cells,PASMCs)的活性,筛选出合适的香烟烟雾提取物(cigarette smoke extract,CSE)和脂多糖(lipopolysaccharide,LPS)干预浓度及时间用于建立细胞损伤模型。将对数生长期细胞分为对照组、CSE组、LPS组和CSE+LPS组,对照组加入细胞培养液培养细胞。CSE组加入含10%CSE的细胞培养液,LPS组加入含1μg/mL LPS的细胞培养液,CSE+LPS组加入含10%CSE和1μg/mL LPS的细胞培养液,培养细胞24 h后,采用CCK-8法检测细胞活性,实时荧光定量聚合酶链反应(real-time fluorescent quantitative PCR,qRT-PCR)检测细胞中mRNA表达,蛋白质印迹法(Western blot,WB)检测细胞中蛋白表达,酶联免疫吸附法(enzyme linked immunosorbent assay,ELISA)检测细胞上清液中炎症因子含量,流式细胞术检测细胞焦亡,透射电子显微镜观察细胞的超微结构。以CCK-8法检测PASMCs的活性,筛选出复方葶苈子汤含药血清和甘草酸的最佳干预浓度及时间。将对数生长期细胞分为正常组、模型组、含药血清组和抑制剂组,对照组加入细胞培养液培养细胞,模型组、含药血清组和抑制剂组加入含10%CSE和1μg/mL LPS的细胞培养液,培养细胞24 h后弃去原培养液。正常组和模型组孔中加入含10%空白血清的细胞培养液,含药血清组孔中加入含10%复方葶苈子汤含药血清的细胞培养液,抑制剂组孔中加入含150μg/mL甘草酸和10%空白血清的细胞培养液,再培养细胞24 h后,采用CCK-8法检测细胞活性,RT-PCR检测细胞中mRNA表达,WB检测细胞中蛋白表达,ELISA检测细胞上清液中炎症因子含量,流式细胞术检测细胞焦亡,透射电子显微镜观察细胞的超微结构。结果筛选出10%CSE和1μg/mL LPS用于建立细胞损伤模型,干预时间为24 h。CSE、LPS和CSE联合LPS可以使PASMCs活性下降;可以促进PASMCs中HMGB1、RAGE、Caspase-8和GSDMD mRNA表达,HMGB1、RAGE、pro Caspase-8、cleaved Caspase-8和GSDMD蛋白表达,促进PASMCs上清液中白细胞介素-1β(interleukin-1β,IL-1β)和白细胞介素-18(interleukin-18,IL-18)分泌,促进PASMCs焦亡发生。筛选出10%复方葶苈子汤含药血清和150μg/mL甘草酸用于细胞干预,干预时间为24 h。复方葶苈子汤含药血清可以使损伤PASMCs活性升高;可以抑制损伤PASMCs中HMGB1、RAGE、Caspase-8和GSDMD mRNA表达,HMGB1、RAGE、pro Caspase-8、cleaved Caspase-8和GSDMD蛋白表达,抑制损伤PASMCs上清液中IL-1β和IL-18分泌,抑制PASMCs焦亡发生。结论复方葶苈子汤可以通过抑制HMGB1表达,抑制Caspase-8介导的PASMCs焦亡,并抑制炎症级联反应,从而改善COPD-PH。 展开更多
关键词 复方葶苈子汤 慢性阻塞性肺疾病相关性肺动脉高压 迁移率族蛋白B1 细胞焦亡 肺动脉平滑肌细胞
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