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Gene and protein expression of proteinase-activated receptor-1, 2 in a murine model of acute graft hostdisease

Quan LI MD , Weiming LI MD , Ping ZOU MD , Jian ZHANG BM ,

《医学前沿(英文)》 2009年 第3卷 第3期   页码 309-315 doi: 10.1007/s11684-009-0043-4

摘要: Proteinase-activated receptors (PARs) are a novel subclass of seven transmembrane-spanning, G protein-coupled receptors. PAR-1 and PAR-2 are widely expressed in a variety of cells and are found to be involved in many physiological and pathological processes including inflammation and immune response. However, little is known about the function of PAR-1, 2 in acute graft host disease (GVHD). In the present study, we first detected the expression of PAR-1, 2 protein and mRNA in a murine model of acute GVHD using the methods of immunohistochemistry, Western blot and quantitative real-time polymerase chain reaction (PCR). Syngeneic hematopoietic stem cell transplantation (HSCT) mice served as controls. The relative gene expression level of PAR-1 was significantly increased in the skin, liver, small intestine of allogeneic HSCT mice (in skin: 0.039±0.013 0.008±0.002 of controls, =0.009; in liver: 0.165±0.006 0.017±0.006 of controls, =0.004; in small intestine: 0.215±0.009 0.016±0.002 of controls, =0.003), but not in the stomach, lung and kidney of allogeneic HSCT mice (>0.05). PAR-2 mRNA expression in the liver and small intestine of allogeneic HSCT mice (in liver: 0.010±0.002 0.003±0.001 of controls, =0.008; in small intestine: 0.006±0.001 0.003±0.001 of controls, =0.024) was increased significantly, but PAR-2 mRNA expression in the other organs (>0.05) was not found to be significantly elevated. PAR-1, 2 protein expression was in accordance with the mRNA expression, as shown by Western blot. Using immunohistochemistry the present study demonstrated that there was strong PAR-1, 2 immunoreactivity in the epithelial cell and vascular endothelial cell of target organs of acute GVHD. Our findings of markedly increased expression of PAR-1, 2 in target organs of acute GVHD suggest that PAR-1 and PAR-2 may play an important role in the pathogenesis of acute GVHD.

关键词: graft vs host disease     proteinase-activated receptor     murine model     hematopoietic stem cell transplantation    

Risk factors for chronic graft-versus-host disease after anti-thymocyte globulin-based haploidentical

Meng Lv, Xiaohui Zhang, Lanping Xu, Yu Wang, Chenhua Yan, Huan Chen, Yuhong Chen, Wei Han, Fengrong Wang, Jingzhi Wang, Kaiyan Liu, Xiaojun Huang, Xiaodong Mo

《医学前沿(英文)》 2019年 第13卷 第6期   页码 667-679 doi: 10.1007/s11684-019-0702-z

摘要: Chronic graft-versus-host disease (cGVHD) is a major complication following unmanipulated haploidentical hematopoietic stem cell transplantation (haplo-HSCT). We aimed to identify the risk factors for cGVHD in patients who underwent anti-thymocyte globulin-based haplo-HSCT for acute myeloid leukemia ( =280). The diagnosis of cGVHD was in accordance with the National Institutes of Health consensus criteria. A total of 169 patients suffered from cGVHD. The patients who had 3 loci mismatched had a higher 8-year incidence of cGVHD (total, 66.0% vs. 53.7%, =0.031; moderate to severe, 42.4% vs. 30.1%, =0.036) than the patients who had 1 to 2 loci mismatched. The patients who had maternal donors had a higher 8-year incidence of moderate to severe cGVHD (49.2% vs. 32.9%, =0.024) compared with the patients who had other donors. The patients who had grades III to IV acute GVHD (aGVHD) had higher 8-year incidence of cGVHD (total, 88.0% vs. 50.4%, <0.001; moderate to severe, 68.0% vs. 27.0%, <0.001) compared with the patients without aGVHD. In multivariate analysis, grades III to IV aGVHD was the only independent risk factor for cGVHD. Thus, further interventions should be considered in patients with severe aGVHD to prevent cGVHD.

关键词: acute graft-versus-host disease     chronic graft-versus-host disease     National Institutes of Health consensus criteria     acute myeloid leukemia     anti-thymocyte globulin    

Graft versus host disease after liver transplantation: A case report

Peng-Ji GAO, Xi-Sheng LENG, Dong WANG, Guang-Ming LI, Lei HUANG, Jie GAO, JI-Ye ZHU,

《医学前沿(英文)》 2010年 第4卷 第4期   页码 469-472 doi: 10.1007/s11684-010-0120-8

摘要: In documenting clinical experience in the diagnosis and treatment of graft host disease (GVHD), we retrospectively analyzed data of one case that has developed GVHD after liver transplantation. This patient exhibited fever, skin rash, and diarrhea on day 9 after liver transplantation. His liver function was normal. Skin biopsy showed scattered keratinocytes accompanied by satellite-like lymphocyte infiltration and basal cell liquefaction degeneration. After carefully analyzing the complications, we took the strategy of decreasing the dose of tacrolimus. Thereafter, the patient’s temperature decreased to normal, his skin rashes subsided, and his diarrhea was relieved. This case suggests that reducing the dosage of immunosuppressive agents can be an effective strategy for GVHD after liver transplantation.

关键词: liver transplantation     graft versus host disease    

免疫调节细胞生物学及其在急性移植物抗宿主病预防或治疗中的临床应用 Review

Bruce R. Blazar

《工程(英文)》 2019年 第5卷 第1期   页码 98-105 doi: 10.1016/j.eng.2018.11.016

摘要:

预防和治疗移植物抗宿主病(GVHD)最常见的方法是尝试耗竭或抑制能介导或支持同种异体反应的T细胞;但这会导致T细胞受体功能缺陷,并因此对感染和肿瘤复发高度敏感。通常通过广泛使用反应性抗体来实现耗竭,而功能损坏通常在使用需长期给药(一般为6个月或更长时间)且具有明显副作用的药物后发生,这种药物可能不会导致供体T细胞对耐调节方案且携带宿主同种抗原的细胞产生耐受性(即无反应性)。随着对免疫系统稳态认识的深化,我们已能鉴定和表征具有免疫调节功能的细胞群。虽然这种细胞群通常比较少见,但可通过分离和扩增此类细胞的方法在移植后晚期增补供体移植物或进行输注,来抑制GVHD。本文将探讨GVHD模型中的生物学和临床前概念验证,以及现已发展至临床测试阶段的免疫调节细胞疗法对GVHD的疗效。

关键词: 移植物抗宿主病(GVHD)     免疫调节细胞     细胞疗法    

Everyone has a donor: contribution of the Chinese experience to global practice of haploidentical hematopoietic stem cell transplantation

Meng Lv, Yingjun Chang, Xiaojun Huang

《医学前沿(英文)》 2019年 第13卷 第1期   页码 45-56 doi: 10.1007/s11684-017-0595-7

摘要: Human leukocyte antigen (HLA)-matched donors for hematopoietic stem cell transplantation (HSCT) have long been scarce in China. Haploidentical (haplo) donors are available for the vast majority of patients, but toxicity has limited this approach. Three new approaches for haplo-HSCT originated from Italy, China, and USA in 1990 and have been developed to world-renowned system up to now. The Chinese approach have been greatly improved by implementing new individualized conditioning regimens, donor selection based on non-HLA systems, risk-directed strategies for graft-versus-host disease and relapse, and infection management. Haplo-HSCT has exhibited similar efficacy to HLA-matched HSCT and has gradually become the predominant donor source and the first alternative donor choice for allo-HSCT in China. Registry-based analyses and multicenter studies adhering to international standards facilitated the transformation of the unique Chinese experience into an inspiration for the refinement of global practice. This review will focus on how the new era in which “everyone has a donor” will become a reality in China.

关键词: haploidentical hematopoietic stem cell transplantation     conditioning     graft-versus-host disease     relapse     infection     donor selection    

Fabrication of layered structure VS anchor in 3D graphene aerogels as a new cathode material for lithium

《能源前沿(英文)》 2019年 第13卷 第3期   页码 597-602 doi: doi:10.1007/s11708-018-0576-9

摘要: VS4 has gained more and more attention for its high theoretical capacity (449 mAh/g with 3e transfer) in lithium ion batteries (LIBs). Herein, a layered structure VS4 anchored in graphene aerogels is prepared and first reported as cathode material for LIBs. VS4@GAs composite exhibits an exceptional high initial reversible capacity (511 mAh/g), an excellent high-rate capability (191 mAh/g at the 5 C), and an excellent cyclic stability (239 mAh/g after 15 cycles).

关键词: VS4     graphene aerogels     cathode     lithium storage    

Performance and synergistic effect of phenolic and thio antioxidants in ABS graft copolymers

Gongsheng LI, Xuhong GUO, Wang NA, Diancheng HAO, Mingyao ZHANG, Huixuan ZHANG, Jun XU

《化学科学与工程前沿(英文)》 2011年 第5卷 第1期   页码 26-34 doi: 10.1007/s11705-010-0531-8

摘要: The synergistic effect of phenolic and thio antioxidants on the stabilization of acrylonitrile-butadiene-styrene (ABS) graft copolymers has been studied. Three commercial antioxidants Irganox245, Irganox1076 and dilauryl thiodipropionate (DLTP) were selected. Formulations based on hindered phenols and secondary antioxidant DLTP were prepared. Stabilization was monitored in terms of changes in the functional groups (oxidation products), tensile properties and yellowness index. Differential scanning calorimetry (DSC) and thermogravimetry (TG) were also used to assess the stability. The results indicated that the combination of Irganox245 and DLTP showed much better stabilization effect than the individual components due to the strong synergistic effect. Only weak synergism could be observed in the formulation that contained Irganox1076 and DLTP. Irganox1076 and Irgnox1076/DLTP exhibited similar behaviors between antioxidants with the highest and lowest efficiencies.

关键词: antioxidant     ABS graft copolymers     synergistic effect    

Separation of epigallocatechin-3-gallate from crude tea polyphenols by using Cellulose diacetate graft

Hong ZHU, Peiyong QIN

《化学科学与工程前沿(英文)》 2011年 第5卷 第3期   页码 330-338 doi: 10.1007/s11705-010-1104-6

摘要: This study demonstrates a new Cellulose diacetate graft -cyclodextrin (CDA- -CD) copolymer asymmetric membrane prepared by a phase inversion technique for the separation of (-)-epigallocatechin-3-gallate (EGCG) from other polyphenols in crude tea. The graft copolymer, CDA- -CD, was synthesized by prepolymerization of cellulose diacetate (CDA) and 1,6-hexamethylene-diisocyanate (HDI), which was then grafted with -cyclodextrin ( -CD). Surface and cross-section morphologies of the CDA- -CD membranes were analyzed by using scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FT-IR) indicated that the -CD was grafted onto the CDA by chemical bonding. The influences of the HDI/CDA mass ratio and the catalyst mass fraction on the -CD graft yield were investigated. The optimum conditions of a HDI/CDA mass ratio of 0.35 g·g and a catalyst mass fraction of 0.18 wt-% produced a -CD graft yield of 26.51 wt-%. The effects of the -CD graft yield and the concentration of the polymer cast solution on the separation of EGCG were also investigated. Under optimum conditions of a -CD graft yield of 24.21 wt-% and a polymer concentration of 13 wt-%, the purity of EGCG increased from 26.51 to 86.91 wt-%.

关键词: (-)-epigallocatechin-3-gallate (EGCG)     tea polyphenols     CDA-β-CD    

Integrated analysis of gut microbiome and host immune responses in COVID-19

《医学前沿(英文)》 2022年 第16卷 第2期   页码 263-275 doi: 10.1007/s11684-022-0921-6

摘要: Emerging evidence indicates that the gut microbiome contributes to the host immune response to infectious diseases. Here, to explore the role of the gut microbiome in the host immune responses in COVID-19, we conducted shotgun metagenomic sequencing and immune profiling of 14 severe/critical and 24 mild/moderate COVID-19 cases as well as 31 healthy control samples. We found that the diversity of the gut microbiome was reduced in severe/critical COVID-19 cases compared to mild/moderate ones. We identified the abundance of some gut microbes altered post-SARS-CoV-2 infection and related to disease severity, such as Enterococcus faecium, Coprococcus comes, Roseburia intestinalis, Akkermansia muciniphila, Bacteroides cellulosilyticus and Blautia obeum. We further analyzed the correlation between the abundance of gut microbes and host responses, and obtained a correlation map between clinical features of COVID-19 and 16 severity-related gut microbe, including Coprococcus comes that was positively correlated with CD3+/CD4+/CD8+ lymphocyte counts. In addition, an integrative analysis of gut microbiome and the transcriptome of peripheral blood mononuclear cells (PBMCs) showed that genes related to viral transcription and apoptosis were up-regulated in Coprococcus comes low samples. Moreover, a number of metabolic pathways in gut microbes were also found to be differentially enriched in severe/critical or mild/moderate COVID-19 cases, including the superpathways of polyamine biosynthesis II and sulfur oxidation that were suppressed in severe/critical COVID-19. Together, our study highlighted a potential regulatory role of severity related gut microbes in the immune response of host.

关键词: COVID-19     SARS-COV-2     gut microbiome     immune response    

Synthesis and thermosensitive behavior of dextran graft copolymers containing poly (N-vinylcaprolactam

SHI Huangying, CHEN Wenjuan, ZHANG Liming

《化学科学与工程前沿(英文)》 2007年 第1卷 第1期   页码 72-75 doi: 10.1007/s11705-007-0015-7

摘要: New graft copolymers were synthesized by grafting N-vinylcaprolactam onto dextran. Their composition and structure were investigated by elemental analyses, infrared spectra and thermogravimetric analyses. By optical transmittance measurements, it was found that the aqueous solutions of these graft copolymers showed a temperature-dependent transmittance change due to the introduction of thermosensitive poly (-vinylcaprolactam) graft chains. Moreover, the lower critical solution temperature (LCST) of the graft copolymer in aqueous solution was dependent on its grafting extent and concentration. The LCST value was found to increase with the increase of the grafting extent and decrease with the increase of the copolymer concentration. With these stimuli-response properties, such polysaccharide derivative may hold potential applications in biomedicine and biotechnology.

关键词: transmittance     copolymer concentration     LCST     temperature     elemental    

工程演化与产业结构优化

殷瑞钰

《中国工程科学》 2012年 第14卷 第3期   页码 8-14

摘要:

工程是人类有组织、有计划、有目的地利用各种资源和基本经济要素构建和制造人工实在的活动,是直接生产力。工程是在特定的自然和社会条件下,相关技术群和诸多基本经济要素组合-集成在一起的动态系统。其中,技术集成系统体现着相关、但又功能不同的异质技术群(不同的技术模块),通过动态有序的集成过程所形成的特定结构及其动态运行的方式;而且这一特定的技术集成系统必须要与特定的自然、社会条件下诸多基本经济要素的合理配置(如资源、土地、资本、劳动力、市场、环境等)互相协同作用,通过设计、构建和运行,形成工程系统,并产生特定的、预期的功能和价值。工程与科学、技术、产业有着密切的联系,但又有所不同。对经济及其结构而言,工程是微观单元,产业是中观层次单元,而由不同产业构成的产业结构则处于宏观层次。工程是不断演化的,工程演化推动着产业的发展和产业结构的调整,甚至出现产业革命。

关键词: 工程     演化     产业结构     优化    

INTERFERENCE BY NON-HOST PLANT ROOTS AND ROOT EXUDATES IN THE INFECTION PROCESSES OF PHYTOPHTHORA NICOTIANAE

《农业科学与工程前沿(英文)》 2021年 第8卷 第3期   页码 447-459 doi: 10.15302/J-FASE-2021399

摘要:

Crop rotations are widely used because they can significantly reduce the incidence of pests and diseases. The interactions between non-host roots and pathogens may be key in the inhibition of soilborne pathogens in crop rotations. Interactions between fennel (Foeniculum vulgare) roots/root exudates and Phytophthora nicotianae were investigated because of the known allelopathy between fennel and tobacco (Nicotiana tabacum). The effects of the key compounds in the fennel rhizosphere on the mycelial growth and zoospore behavior of P. nicotianae were assessed. The roots of fennel attracted P. nicotianae zoospores and inhibited their motility and the germination of cystospores, with some cystospores rupturing. 4-ethylacetophenone, vanillin and N-formylpiperidine were consistently identified in the fennel rhizosphere and were found to interfere with the infection of P. nicotianae, especially vanillin. Hyphae treated with these compounds produced more abnormal branches and accumulated reactive oxygen species. These interspecific interactions between non-host roots and pathogens were found to be an important factor in the inhibition by fennel of infection by P. nicotianae.

 

关键词: fennel and tobacco rotation     infection behavior     Phytophthora nicotianae     reactive oxygen species     vanillin    

Permeability and thermal conductivity of host compressed natural graphite for consolidated activated

Bo TIAN, Liwei WANG, Zhequan JIN, Ruzhu WANG

《能源前沿(英文)》 2011年 第5卷 第2期   页码 159-165 doi: 10.1007/s11708-011-0145-y

摘要: Permeability and thermal conductivity test units were set up to study the heat and mass transfer performance of the host material, i.e. expanded natural graphite (ENG), for consolidated activated carbon (AC) adsorbent. The permeability was tested with nitrogen as the gas source, and the thermal conductivity was studied using steady-state heat source method. The results showed that the values of permeability and thermal conductivity were 10 to 10 m and 1.7 to 3.2 W/(m·K), respectively, while the density compressed expanded natural graphite (CENG) varied from 100 to 500 kg/m . The permeability decreased with the increasing density of CENG, whereas the thermal conductivity increased with the increasing density of CENG. Then the thermal conductivity and permeability of granular AC were researched. It was discovered that the thermal conductivity of samples with different grain size almost kept constant at 0.36 W/(m·K) while the density was approximately 600 kg/m . This means that the thermal conductivity was not related to the grain size of AC. The thermal conductivity of CENG was improved by 5 to 10 times compared with that of granular AC. Such a result showed that CENG was a promising host material for AC to improve the heat transfer performance, while the mass transfer performance should be considered in different conditions for utilization of adsorbent.

关键词: permeability     thermal conductivity     expanded nature graphite     activated carbon    

Host protection against Omicron BA.2.2 sublineages by prior vaccination in spring 2022 COVID-19 outbreak

《医学前沿(英文)》 2023年 第17卷 第3期   页码 562-575 doi: 10.1007/s11684-022-0977-3

摘要: The Omicron family of SARS-CoV-2 variants are currently driving the COVID-19 pandemic. Here we analyzed the clinical laboratory test results of 9911 Omicron BA.2.2 sublineages-infected symptomatic patients without earlier infection histories during a SARS-CoV-2 outbreak in Shanghai in spring 2022. Compared to an earlier patient cohort infected by SARS-CoV-2 prototype strains in 2020, BA.2.2 infection led to distinct fluctuations of pathophysiological markers in the peripheral blood. In particular, severe/critical cases of COVID-19 post BA.2.2 infection were associated with less pro-inflammatory macrophage activation and stronger interferon alpha response in the bronchoalveolar microenvironment. Importantly, the abnormal biomarkers were significantly subdued in individuals who had been immunized by 2 or 3 doses of SARS-CoV-2 prototype-inactivated vaccines, supporting the estimation of an overall 96.02% of protection rate against severe/critical disease in the 4854 cases in our BA.2.2 patient cohort with traceable vaccination records. Furthermore, even though age was a critical risk factor of the severity of COVID-19 post BA.2.2 infection, vaccination-elicited protection against severe/critical COVID-19 reached 90.15% in patients aged ≥ 60 years old. Together, our study delineates the pathophysiological features of Omicron BA.2.2 sublineages and demonstrates significant protection conferred by prior prototype-based inactivated vaccines.

关键词: SARS-CoV-2     COVID-19     host response     bronchoalveolar lavage fluid (BALF)    

Reducing biliary complications in adult-to-adult living donor liver transplantation using right lobe graft

YAN Lunan, WEN Tianfu, WANG Wentao, YANG Jiayin, XU Mingqing, CHEN Zheyu, WU Hong

《医学前沿(英文)》 2008年 第2卷 第2期   页码 130-133 doi: 10.1007/s11684-008-0024-z

摘要: The aim of this paper is to summarize our experience of using right lobe liver grafts to reduce biliary complications in adult-to-adult (A-A) living donor liver transplantation (LDLT). From January 2002 to October 2007, 124 adult patients underwent living donor liver transplantation using right lobe grafts at the West China Hospital, Sichuan University Medical School, China. There was no death in all donors. Biliary reconstruction for 178 hepatic duct orifices from 124 donor grafts was performed which included 106 reconstructions of duct-to-duct anastomoses and 72 cholangiojejunostomy. Nine recipients had biliary complications including six bile leakages (four from the anastomotic site and two from the cut surface of the liver graft) and three biliary strictures. With the improved techniques for biliary reconstruction, we have achieved good results in 124 recipients of A-A LDLT. We ascribe our success to the introduction of microsurgical techniques and the use of fixed operators which help in decreasing the biliary complications of LDLT.

关键词: microsurgical     October     improved     success     transplantation    

标题 作者 时间 类型 操作

Gene and protein expression of proteinase-activated receptor-1, 2 in a murine model of acute graft hostdisease

Quan LI MD , Weiming LI MD , Ping ZOU MD , Jian ZHANG BM ,

期刊论文

Risk factors for chronic graft-versus-host disease after anti-thymocyte globulin-based haploidentical

Meng Lv, Xiaohui Zhang, Lanping Xu, Yu Wang, Chenhua Yan, Huan Chen, Yuhong Chen, Wei Han, Fengrong Wang, Jingzhi Wang, Kaiyan Liu, Xiaojun Huang, Xiaodong Mo

期刊论文

Graft versus host disease after liver transplantation: A case report

Peng-Ji GAO, Xi-Sheng LENG, Dong WANG, Guang-Ming LI, Lei HUANG, Jie GAO, JI-Ye ZHU,

期刊论文

免疫调节细胞生物学及其在急性移植物抗宿主病预防或治疗中的临床应用

Bruce R. Blazar

期刊论文

Everyone has a donor: contribution of the Chinese experience to global practice of haploidentical hematopoietic stem cell transplantation

Meng Lv, Yingjun Chang, Xiaojun Huang

期刊论文

Fabrication of layered structure VS anchor in 3D graphene aerogels as a new cathode material for lithium

期刊论文

Performance and synergistic effect of phenolic and thio antioxidants in ABS graft copolymers

Gongsheng LI, Xuhong GUO, Wang NA, Diancheng HAO, Mingyao ZHANG, Huixuan ZHANG, Jun XU

期刊论文

Separation of epigallocatechin-3-gallate from crude tea polyphenols by using Cellulose diacetate graft

Hong ZHU, Peiyong QIN

期刊论文

Integrated analysis of gut microbiome and host immune responses in COVID-19

期刊论文

Synthesis and thermosensitive behavior of dextran graft copolymers containing poly (N-vinylcaprolactam

SHI Huangying, CHEN Wenjuan, ZHANG Liming

期刊论文

工程演化与产业结构优化

殷瑞钰

期刊论文

INTERFERENCE BY NON-HOST PLANT ROOTS AND ROOT EXUDATES IN THE INFECTION PROCESSES OF PHYTOPHTHORA NICOTIANAE

期刊论文

Permeability and thermal conductivity of host compressed natural graphite for consolidated activated

Bo TIAN, Liwei WANG, Zhequan JIN, Ruzhu WANG

期刊论文

Host protection against Omicron BA.2.2 sublineages by prior vaccination in spring 2022 COVID-19 outbreak

期刊论文

Reducing biliary complications in adult-to-adult living donor liver transplantation using right lobe graft

YAN Lunan, WEN Tianfu, WANG Wentao, YANG Jiayin, XU Mingqing, CHEN Zheyu, WU Hong

期刊论文