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Protective efficacy of vaccination with NcMIC3 and NcMIC8 against

Taotao ZHANG, Xiao ZHANG, Qun LIU, Jianhai XU, Jing LIU

《农业科学与工程前沿(英文)》 2019年 第6卷 第2期   页码 188-196 doi: 10.15302/J-FASE-2019253

摘要:

Microneme proteins (MICs) are important for Apicomplexan parasite invasion due to their adhesion to host cells. Several studies have indicated that MIC3 and MIC8 are important adhesion factors and potential vaccine candidates against neosporosis. In this study, we evaluated the protective efficacy of recombinant proteins and DNA vaccines of NcMIC3 and NcMIC8. BALB/c mice were immunized with rNcMIC3, rNcMIC8, pcDNA3.1-NcMIC3 and pcDNA3.1-NcMIC8 respectively, and challenged with tachyzoites. The immune responses were evaluated through cytokine, antibody measurements and the parasite burden in the mice brain tissues. Serological analysis showed that recombinant protein vaccines induced higher levels of immunoglobulin G (IgG) than other groups. The percentage of IgG1 and IgG2a in the recombinant protein groups was higher than the other groups, and with a predominance of IgG1 over IgG2a, suggesting that recombinant protein vaccines elicited a Th2-type immune response, while DNA vaccines mainly produce a Th1-type immune response. In addition, mice immunized with rNcMIC3 and rNcMIC8 a had lower parasite burden in brain tissue compared with the other groups. These results demonstrate that rNcMIC3 and rNcMIC8 could induce humoral and Th2-type immune response, leading to a considerable level of resistance against neosporosis.

关键词: NcMIC3     NcMIC8     Neospora caninum     vaccination    

Zeolitic imidazolate framework-8 (ZIF-8) for drug delivery: A critical review

Simin Feng, Xiaoli Zhang, Dunyun Shi, Zheng Wang

《化学科学与工程前沿(英文)》 2021年 第15卷 第2期   页码 221-237 doi: 10.1007/s11705-020-1927-8

摘要: Zeolitic imidazolate framework-8 (ZIF-8), composed of Zn ions and imidazolate ligands, is a class of metal-organic frameworks, which possesses a similar structure as conventional aluminosilicate zeolites. This material exhibits inherent porous property, high loading capacity, and pH-sensitive degradation, as well as exceptional thermal and chemical stability. Extensive research effort has been devoted to relevant research aspects ranging from synthesis methods, property characterization to potential applications of ZIF-8. This review focuses on the recent development of ZIF-8 synthesis methods and its promising applications in drug delivery. The potential risks of using ZIF-8 for drug delivery are also summarized.

关键词: zeolitic imidazolate framework-8 (ZIF-8)     synthesis methods     applications     drug delivery    

Role of salivary matrix metalloproteinase-8 (MMP-8) in chronic periodontitis diagnosis

null

《医学前沿(英文)》 2015年 第9卷 第1期   页码 72-76 doi: 10.1007/s11684-014-0347-x

摘要:

Periodontitis is an inflammatory disease of the periodontium. Any imbalance between the matrix metalloproteinases (MMPs) secreted by neutrophils and tissue inhibitors initiates the destruction of collagen in gum tissue, leading to chronic periodontitis. This study aimed to correlate salivary levels of MMP-8 and periodontal parameters of chronic periodontitis to establish MMP-8 as a noninvasive marker for the early diagnosis of chronic periodontitis. The study involved 40 subjects visiting the periodontic OPD of Dr. Ziauddin Ahmad Dental College and Hospital, located in Aligarh, U.P., India, from 2011 to 2012. The subjects were divided into two groups: group I consisted of 20 periodontally healthy subjects (controls) while group II consisted of 20 patients with chronic periodontitis. Chronic periodontitis was assessed on the basis of several periodontal parameters, including pocket probing depth (PPD), clinical attachment level (CAL), gingival index (GI), and plaque index (PI). Around 3 ml of unstimulated and whole expectorated saliva was collected for MMP-8 estimation by ELISA using Quantikine human total MMP-8 immunoassay kits. Data were analyzed using STATISTICA (Windows version 6) software. Salivary MMP-8 levels of groups I and II were 190.91±143.89 ng/ml and 348.26±202.1 ng/ml, respectively. The MMP-8 levels and periodontal status (PPD, CAL, GI, and PI) of groups I and II showed positive and significant correlations (for PPD, r = 0.63, P<0.001; for CAL, r = 0.54, P<0.001; for GI, r = 0.49, P<0.001; and for PI, r = 0.63, P<0.001). The results of this study demonstrate elevated concentrations of MMP-8 in individuals with chronic periodontitis.

关键词: matrix metalloproteinase-8     chronic periodontitis     pocket probing depth     clinical attachment level     gingival index     plaque index    

青岛地铁8号线海底隧道

贺维国, 刘鹏

《工程(英文)》 2018年 第4卷 第2期   页码 167-169 doi: 10.1016/j.eng.2018.03.012

8英寸绝缘栅双极型晶体管 (IGBT) 关键技术研究 Article

刘国友,丁荣军,罗海辉

《工程(英文)》 2015年 第1卷 第3期   页码 361-366 doi: 10.15302/J-ENG-2015043

摘要:

基于8英寸绝缘栅双极型晶体管 (IGBT) 生产线的建设,重点解决了8英寸IGBT先进工艺技术、第四代高压双扩散金属氧化物半导体 (DMOS+) IGBT技术和第五代沟槽栅IGBT技术等关键技术问题,实现了高压IGBT芯片制造从6英寸到8英寸的技术突破,自主开发的1600 A/1.7 kV与1500 A/3.3 kV IGBT模块已经被成功制造并通过考核,现已应用于轨道交通牵引系统。

关键词: 绝缘栅双极型晶体管 (IGBT)     高功率密度     沟槽栅     8英寸     轨道交通    

Prohibitin regulates mTOR pathway via interaction with FKBP8

Jiahui Zhang, Yanan Yin, Jiahui Wang, Jingjing Zhang, Hua Liu, Weiwei Feng, Wen Yang, Bruce Zetter, Yingjie Xu

《医学前沿(英文)》 2021年 第15卷 第3期   页码 448-459 doi: 10.1007/s11684-020-0805-6

摘要: The ability of tumor cells to sustain continuous proliferation is one of the major characteristics of cancer. The activation of oncogenes and the mutation or inactivation of tumor suppressor genes ensure the rapid proliferation of tumor cells. The PI3K–Akt–mTOR axis is one of the most frequently modified signaling pathways whose activation sustains cancer growth. Unsurprisingly, it is also one of the most commonly attempted targets for cancer therapy. FK506 binding protein 8 (FKBP8) is an intrinsic inhibitor of mTOR kinase that also exerts an anti-apoptotic function. We aimed to explain these contradictory aspects of FKBP8 in cancer by identifying a “switch” type regulator. We identified through immunoprecipitation–mass spectrometry-based proteomic analysis that the mitochondrial protein prohibitin 1 (PHB1) specifically interacts with FKBP8. Furthermore, the downregulation of PHB1 inhibited the proliferation of ovarian cancer cells and the mTOR signaling pathway, whereas the FKBP8 level in the mitochondria was substantially reduced. Moreover, concomitant with these changes, the interaction between FKBP8 and mTOR substantially increased in the absence of PHB1. Collectively, our finding highlights PHB1 as a potential regulator of FKBP8 because of its subcellular localization and mTOR regulating role.

关键词: prohibitin 1     FKBP8     mTOR     cell proliferation     cancer    

Predictive values of plasma TNFα and IL-8 for intracranial hemorrhage in patients with acute promyelocytic

《医学前沿(英文)》 2022年 第16卷 第6期   页码 909-918 doi: 10.1007/s11684-021-0890-1

摘要: In patients with acute promyelocytic leukemia (APL), intracranial hemorrhage (ICH), if not identified promptly, could be fatal. It is the leading cause of failure of induction and early death. Thus, biomarkers that could promptly predict severe complications are critical. Here, cytokine differences between patients with APL with and without ICH were investigated to develop predictive models for this complication. The initial cytokine profiling using plasma samples from 39 patients and 18 healthy donors found a series of cytokines that were remarkedly different between patients with APL and healthy controls. The APL patients were subsequently divided into high and low white blood cell count groups. Results showed that tumor necrosis factor α and interleukin 8 (IL-8) were vital in distinguishing patients with APL who did or did not develop ICH. In addition, verification in 81 patients with APL demonstrated that the two cytokines were positively correlated with the cumulative incidence of ICH. Finally, in-vitro and in-vivo experimental evidence were provided to show that IL-8 influenced the migration of APL-derived NB4 cells and impaired the blood–brain barrier in PML/RARα positive blast-transplanted FVB/NJ mice. These assessments may facilitate the early warning of ICH and reduce future mortality levels in APL.

关键词: acute promyelocytic leukemia     intracranial hemorrhage     cytokines     biomarker    

IRF4 and IRF8 expression are associated with clinical phenotype and clinico-hematological response to

《医学前沿(英文)》 2022年 第16卷 第3期   页码 403-415 doi: 10.1007/s11684-021-0858-1

摘要: The morbidity and mortality of myeloproliferative neoplasms (MPNs) are primarily caused by arterial and venous complications, progression to myelofibrosis, and transformation to acute leukemia. However, identifying molecular-based biomarkers for risk stratification of patients with MPNs remains a challenge. We have previously shown that interferon regulatory factor-8 (IRF8) and IRF4 serve as tumor suppressors in myeloid cells. In this study, we evaluated the expression of IRF4 and IRF8 and the JAK2V617F mutant allele burden in patients with MPNs. Patients with decreased IRF4 expression were correlated with a more developed MPN phenotype in myelofibrosis (MF) and secondary AML (sAML) transformed from MPNs versus essential thrombocythemia (ET). Negative correlations between the JAK2V617F allele burden and the expression of IRF8 (P <0.05) and IRF4 (P<0.001) and between white blood cell (WBC) count and IRF4 expression (P <0.05) were found in ET patients. IRF8 expression was negatively correlated with the JAK2V617F allele burden (P <0.05) in polycythemia vera patients. Complete response (CR), partial response (PR), and no response (NR) were observed in 67.5%, 10%, and 22.5% of ET patients treated with hydroxyurea (HU), respectively, in 12 months. At 3 months, patients in the CR group showed high IRF4 and IRF8 expression compared with patients in the PR and NR groups. In the 12-month therapy period, low IRF4 and IRF8 expression were independently associated with the unfavorable response to HU and high WBC count. Our data indicate that the expression of IRF4 and IRF8 was associated with the MPN phenotype, which may serve as biomarkers for the response to HU in ET.

关键词: myeloproliferative neoplasms     IRF4     IRF8     hydroxyurea     essential thrombocythemia    

Parametric study on the mixed solvent synthesis of ZIF-8 nano- and micro-particles for CO adsorption:

Alireza Hadi, Javad Karimi-Sabet, Abolfazl Dastbaz

《化学科学与工程前沿(英文)》 2020年 第14卷 第4期   页码 579-594 doi: 10.1007/s11705-018-1770-3

摘要: The room temperature synthesis of ZIF-8 micro- and nano-particles was investigated using a mixed methanol-water solvent system. ZIF-8 particles of good quality and high crystallinity were obtained. Response surface methodology was used to determine the effect of the synthesis conditions on the ZIF-8 yield, particle size distribution, and mean particle size. The ligand/metal salt molar ratio followed by the amount of sodium formate (the deprotonating agent) and then the amount of water (i.e., the composition of the mixed solvent) respectively had the largest effects on both the ZIF-8 yield and particle size. Results showed that mixing of solvents with different strengths in producing ZIF-8 crystals is a practical method to size-controlled synthesis of ZIF-8 particles. This method is more favorable for industrial-scale ZIF-8 synthesis than using excess amounts of ligands or chemical additives (like sodium formate). In addition, ZIF-8 samples with different mean particle sizes (100, 500, and 1000 nm) were used for CO adsorption and the mid-sized ZIF-8 particles had the highest adsorption capacity.

关键词: metal organic frameworks     zeolitic imidazolate frameworks     ZIF-8     response surface methodology     Box Behnken design     CO adsorption    

Gene therapy for hemophilia B mice with scAAV8-LP1-hFIX

null

《医学前沿(英文)》 2016年 第10卷 第2期   页码 212-218 doi: 10.1007/s11684-016-0438-y

摘要:

Hemophilia B is a hemorrhagic disease caused by the deficiency of clotting factor IX (FIX). Gene therapy might be the ultimate strategy for the disease. However, two main problems that should be solved in gene therapy for hemophilia B are immunity and safety. Self-complementary adeno-associated virus serotype 8 (scAAV8), a non-human primate AAV featuring low immunogenicity and high transfection efficiency in liver cells, might be a potential vector for hemophilia B gene therapy. A strong liver-specific promoter-1 (LP1) was inserted and mutant human FIX Arg338Ala was introduced into plasmid scAAV8-LP1 to develop an optimized AAV8 vector that expresses human clotting factor FIX (hFIX). The efficiency of scAAV8-LP1-hFIX administered through normal systemic injection or hydrodynamic injection was compared. A high expression was achieved using hydrodynamic injection, and the peak hFIX expression levels in the 5×1011 and 1×1011 virus genome (vg) cohorts were 31.94% and 25.02% of normal level, respectively, at 60 days post-injection. From the perspective of long-term (200 days) expression, both injection methods presented promising results with the concentration value maintained above 4% of normal plasma. The results were further verified by enzyme-linked immunosorbent assay and activated partial thromboplastin time. Our study provides a potential gene therapy method for hemophilia B.

关键词: hemophilia B     AAV8     hFIX     gene therapy    

A highly selective fluorescent probe for real-time imaging of UDP-glucuronosyltransferase 1A8 in living

《化学科学与工程前沿(英文)》 2022年 第16卷 第1期   页码 103-111 doi: 10.1007/s11705-021-2064-8

摘要: Uridine diphosphate (UDP)-glucuronosyltransferases (UGTs) are enzymes involved in the biotransformation of important endogenous compounds such as steroids, bile acids, and hormones as well as exogenous substances including drugs, environmental toxicants, and carcinogens. Here, a novel fluorescent probe BDMP was developed based on boron-dipyrromethene (BODIPY) with high sensitivity for the detection of UGT1A8. The glucuronidation of BDMP not only exhibited a red-emission wavelength (λex/λem = 500/580 nm), but also displayed an excellent UGT1A8-dependent fluorescence signal with a good linear relationship with UGT1A8 concentration. Based on this perfect biocompatibility and cell permeability, BDMP was successfully used to image endogenous UGT1A8 in human cancer cell lines (LoVo and HCT15) in real time. In addition, BDMP could also be used to visualize UGT1A8 in tumor tissues. These results suggested that BDMP is a promising molecular tool for the investigation of UGT1A8-mediated physiological function in humans.

关键词: UDP-glucuronosyltransferase 1A8     fluorescent probe     subtype selectivity     fluorescence imaging    

Single and joint effects of HHCB and cadmium on zebrafish (

Lei ZHANG, Jing AN, Qixing ZHOU

《环境科学与工程前沿(英文)》 2012年 第6卷 第3期   页码 360-372 doi: 10.1007/s11783-011-0353-z

摘要: As an important type of emerging pollutants, ecological toxicity and risk of artificial musks are increasingly concerned. Thus, single and joint toxic effects of 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8- hexamethylcyclopenta-gamma-2-benzopyran (HHCB) as one of the most widely applied artificial musks and cadmium (Cd) as an toxic metal on zebrafish ( ) were investigated by the exposure of zebrafish to various concentrations of HHCB or/and Cd in feculent water containing bedloads. The results indicated that the joint effect of HHCB and Cd changed during different exposure times within 120 h. The index of the antioxidant enzyme system including superoxide dismutase (SOD) and peroxidase (POD), and malondialdehyde (MDA) were sensitive and induced in the zebrafish stressed by Cd, and content of soluble protein (SP) was sensitive to HHCB and could be used as a biomarker for HHCB. Joint effects on antioxidant enzymes depended more on the effect of single Cd in the first one or two days. However, in the rest exposure days, the effect of HHCB began to dominate in the joint effect during the exposure process.

关键词: 1     3     4     6     7     8-hexahydro-4     6     6     7     8     8-hexamethylcyclopenta-gamma-2-benzopyran (HHCB)     cadmium (Cd)     antioxidant biomarker     feculent water containing bedloads    

C8芳烃异构化催化剂的开发及应用

乔映宾

《中国工程科学》 1999年 第1卷 第1期   页码 73-77

摘要:

文章介绍了SKI系列C8芳烃异构化催化剂研究工作的进展。阐述了催化剂研制开发的创新思路以及该催化剂的优异性能。该催化剂可使贫对二甲苯或贫对、邻二甲苯的混合C8芳烃异构为接近热力学平衡的C8芳烃,C8芳烃的选择性大于97%,使用寿命可达5年以上。并介绍了该催化剂在引进的七套C8芳烃异构化工业装置上取代了进口催化剂,将该科技成果转化为现实的生产力所取得的成绩。

关键词: 异构化     催化剂     二甲苯    

Influence of retinoic acid on TBX1 expression in myocardial cells induced by Shh and Fgf8

Miao LIU, Xiaoyan WU, Jiawei XU, Runming JIN

《医学前沿(英文)》 2009年 第3卷 第1期   页码 61-66 doi: 10.1007/s11684-009-0007-8

摘要: The aim of this study was to explore the regulatory mechanism of retinoic acid (RA) on the TBX1 gene expression in myocardial cells. Ventricular cardiocytes were isolated from neonatal rats and cultured, and then treated with different concentrations of retinoic acid. The expression of Shh and Fgf8 at mRNA and protein levels in neonatal rat myocardial cells were measured by using RT-PCR and Western blot technique, respectively. There was basal expression of Shh and Fgf8 in the control group. When treated with 3×10 mol/L RA, we observed that the expression of Shh mRNA and protein in neonatal rat myocardial cells were up-regulated by 1.51 ( <0.05) and 1.10 times ( <0.05), respectively. In comparison with the control group, under the concentration of 5×10 mol/L RA, they were up-regulated by 2.21 ( <0.05) and 2.38 times ( <0.05) individually. Meanwhile, we could detect that the expression of Fgf8 mRNA and protein were up-regulated by 2.50 times ( <0.05) and 80% ( <0.05) separately compared with the control group after stimulation of 3×10 mol/L RA, and they were up-regulated by 3.48 ( <0.05) and 2.04 times ( <0.05) individually after stimulation of 5×10 mol/L RA. The results indicated that RA could induce the expression of Shh and Fgf8 in neonatal rat myocardial cells. At the same time, it has shown that Shh and Fgf8 were involved in the regulation process of RA on TBX1 expression.

关键词: retinoic acid     Tbx1 protein     Shh protein     Fgf8 protein    

8位MCU IP核设计

李秀娟,王祖强,刘宪伟

《中国工程科学》 2006年 第8卷 第12期   页码 89-91

摘要:

采用自顶向下的设计方法,设计了8位MCU IP核。该8位MCU IP核可简化为两大部分,通过精心设计,时序整齐,译码电路单元结构简单,层次化数据通道模型结构规整。

关键词: MCU     IP     数据通道    

标题 作者 时间 类型 操作

Protective efficacy of vaccination with NcMIC3 and NcMIC8 against

Taotao ZHANG, Xiao ZHANG, Qun LIU, Jianhai XU, Jing LIU

期刊论文

Zeolitic imidazolate framework-8 (ZIF-8) for drug delivery: A critical review

Simin Feng, Xiaoli Zhang, Dunyun Shi, Zheng Wang

期刊论文

Role of salivary matrix metalloproteinase-8 (MMP-8) in chronic periodontitis diagnosis

null

期刊论文

青岛地铁8号线海底隧道

贺维国, 刘鹏

期刊论文

8英寸绝缘栅双极型晶体管 (IGBT) 关键技术研究

刘国友,丁荣军,罗海辉

期刊论文

Prohibitin regulates mTOR pathway via interaction with FKBP8

Jiahui Zhang, Yanan Yin, Jiahui Wang, Jingjing Zhang, Hua Liu, Weiwei Feng, Wen Yang, Bruce Zetter, Yingjie Xu

期刊论文

Predictive values of plasma TNFα and IL-8 for intracranial hemorrhage in patients with acute promyelocytic

期刊论文

IRF4 and IRF8 expression are associated with clinical phenotype and clinico-hematological response to

期刊论文

Parametric study on the mixed solvent synthesis of ZIF-8 nano- and micro-particles for CO adsorption:

Alireza Hadi, Javad Karimi-Sabet, Abolfazl Dastbaz

期刊论文

Gene therapy for hemophilia B mice with scAAV8-LP1-hFIX

null

期刊论文

A highly selective fluorescent probe for real-time imaging of UDP-glucuronosyltransferase 1A8 in living

期刊论文

Single and joint effects of HHCB and cadmium on zebrafish (

Lei ZHANG, Jing AN, Qixing ZHOU

期刊论文

C8芳烃异构化催化剂的开发及应用

乔映宾

期刊论文

Influence of retinoic acid on TBX1 expression in myocardial cells induced by Shh and Fgf8

Miao LIU, Xiaoyan WU, Jiawei XU, Runming JIN

期刊论文

8位MCU IP核设计

李秀娟,王祖强,刘宪伟

期刊论文