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Proteomics study of Mycoplasma pneumoniae pneumonia reveals the Fc fragment of the IgG-binding protein

《医学前沿（英文）》 2022年 第16卷 第3期   页码 378-388 doi: 10.1007/s11684-021-0840-y

摘要： Macrolide and corticosteroid resistance has been reported in patients with Mycoplasma pneumoniae (MP) pneumonia (MPP). MP clearance is difficult to achieve through antibiotic treatment in sensitive patients with severe MPP (SMPP). SMPP in children might progress to airway remodeling and even bronchiolitis/bronchitis obliterans. Therefore, identifying serum biomarkers that indicate MPP progression and exploring new targeted drugs for SMPP treatment require urgency. In this study, serum samples were collected from patients with general MPP (GMPP) and SMPP to conduct proteomics profiling. The Fc fragment of the IgG-binding protein (FCGBP) was identified as the most promising indicator of SMPP. Biological enrichment analysis indicated uncontrolled inflammation in SMPP. ELISA results proved that the FCGBP level in patients with SMPP was substantially higher than that in patients with GMPP. Furthermore, the FCGBP levels showed a decreasing trend in patients with GMPP but the opposite trend in patients with SMPP during disease progression. Connectivity map analyses identified 25 possible targeted drugs for SMPP treatment. Among them, a mechanistic target of rapamycin kinase (mTOR) inhibitor, which is a macrolide compound and a cell proliferation inhibitor, was the most promising candidate for targeting SMPP. To our knowledge, this study was the first proteomics-based characterization of patients with SMPP and GMPP.

关键词： severe Mycoplasma pneumoniae pneumonia     children     proteomics     Fc fragment of the IgG-binding protein     mechanistic target of rapamycin kinase inhibitor    

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with composition of lung microbiota and important taxa predicting clinical prognosis in patients with severecommunity-acquired pneumonia

《医学前沿（英文）》 2022年 第16卷 第3期   页码 389-402 doi: 10.1007/s11684-021-0856-3

摘要： Few studies have described the key features and prognostic roles of lung microbiota in patients with severe community-acquired pneumonia (SCAP). We prospectively enrolled consecutive SCAP patients admitted to ICU. Bronchoscopy was performed at bedside within 48 h of ICU admission, and 16S rRNA gene sequencing was applied to the collected bronchoalveolar lavage fluid. The primary outcome was clinical improvements defined as a decrease of 2 categories and above on a 7-category ordinal scale within 14 days following bronchoscopy. Sixty-seven patients were included. Multivariable permutational multivariate analysis of variance found that positive bacteria lab test results had the strongest independent association with lung microbiota (R2=0.033; P=0.018), followed by acute kidney injury (AKI; R2=0.032; P=0.011) and plasma MIP-1β level (R2=0.027; P=0.044). Random forest identified that the families Prevotellaceae, Moraxellaceae, and Staphylococcaceae were the biomarkers related to the positive bacteria lab test results. Multivariable Cox regression showed that the increase in α-diversity and the abundance of the families Prevotellaceae and Actinomycetaceae were associated with clinical improvements. The positive bacteria lab test results, AKI, and plasma MIP-1β level were associated with patients’ lung microbiota composition on ICU admission. The families Prevotellaceae and Actinomycetaceae on admission predicted clinical improvements.

关键词： severe community-acquired pneumonia     lung microbiota     clinical improvements     7-category ordinal scale     Prevotellaceae    

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2018—2019年我国北方地区奶牛临床型乳房炎源肺炎克雷伯菌的分子特征 Article

宋士凯, 何文娟, 杨大伟, Manar Benmouffok, 王瑶, 李基云, 孙城涛, 宋祥彬, 马士珍, 蔡畅, 丁双阳, 吴聪明, 沈张奇, 汪洋

《工程（英文）》 2022年 第10卷 第3期   页码 146-154 doi: 10.1016/j.eng.2021.01.015

摘要：

肺炎克雷伯菌是奶牛乳房炎的重要诱因，常引起奶牛的产奶量降低和死亡率增高。目前尚缺乏奶牛乳房炎源肺炎克雷伯菌分子特征的研究数据，限制了对其在食品生产链中传播风险的评估。本研究于2018—2019 年从我国北方地区患临床型乳房炎奶牛中采集了6301 份奶样，共分离到183 株肺炎克雷伯菌，两年的平均分离率分别为3.03%和2.80%。与人类临床肺炎克雷伯菌分离株相似，奶牛临床型乳房炎源肺炎克雷伯菌分离株可分为肺炎克雷伯菌(KpI，143 株）、准肺炎克雷伯菌（KpII-B，37 株）和变栖肺炎克雷伯菌（KpIII，3 株）三个种群。在KpI 分离株中检测到超广谱β-内酰胺酶（ESBL）的编码基因blaSHV-2a、blaCTX-M-14和blaCTX-M-15，以及可能与奶牛致病性和宿主适应性有关的编码基因clpC、lpfA、lacI、lacZ、lacY和fecABDEIR。KpI 菌株比KpII-B 和KpIII 菌株表现出更高的流行率以及抗生素耐药基因和毒力基因携带率，表明它可能对奶牛的危害更大。此外，还发现奶牛KpI菌株与人医临床分离的KpI菌株在种群结构上存在明显差异，且奶牛源KpI菌株中很少见到与人类侵袭性感染相关的基因，表明奶牛源KpI菌株对人类健康的威胁较小；奶牛KpII-B 分离株与人类感染分离株具有较高的核苷酸序列一致性，且它们携带固氮基因nif的比例都很高，表明奶牛和人类KpII-B 分离株与植物源性KpII-B 菌株之间存在一定关联。

关键词： 临床型乳房炎     肺炎克雷伯菌     分子特征     种群结构     抗生素耐药性    

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流感与COVID-19患者的免疫球蛋白G糖基化差异 Article

Hadžibegović, Barbara Radovani, Ivana Jurin, Lovorka Đerek, Eva Huljev, Alemka Markotić, Ivica Lukšić, Irena Trbojević-Akmačić, Gordan Lauc, Ivan Gudelj, Rok Čivljak

《工程（英文）》 2023年 第26卷 第7期   页码 54-62 doi: 10.1016/j.eng.2022.08.007

摘要：

The essential role of immunoglobulin G (IgG) in immune system regulation and combatting infectious diseases cannot be fully recognized without an understanding of the changes in its N-glycans attached to the asparagine 297 of the Fc domain that occur under such circumstances. These glycans impact the antibody stability, half-life, secretion, immunogenicity, and effector functions. Therefore, in this study, we analyzed and compared the total IgG glycome—at the level of individual glycan structures and derived glycosylation traits (sialylation, galactosylation, fucosylation, and bisecting N-acetylglucosamine (GlcNAc))—of 64 patients with influenza, 77 patients with coronavirus disease 2019 (COVID-19), and 56 healthy controls. Our study revealed a significant decrease in IgG galactosylation, sialylation, and bisecting GlcNAc (where the latter shows the most significant decrease) in deceased COVID-19 patients, whereas IgG fucosylation was increased. On the other hand, IgG galactosylation remained stable in influenza patients and COVID-19 survivors. IgG glycosylation in influenza patients was more time-dependent: In the first seven days of the disease, sialylation increased and fucosylation and bisecting GlcNAc decreased; in the next 21 days, sialylation decreased and fucosylation increased (while bisecting GlcNAc remained stable). The similarity of IgG glycosylation changes in COVID-19 survivors and influenza patients may be the consequence of an adequate immune response to enveloped viruses, while the observed changes in deceased COVID-19 patients may indicate its deviation.

关键词： 流行性感冒     COVID-19     病毒感染     糖基化     免疫球蛋白G     肺炎    

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Development of a new method for RMR and Q classification method to optimize support system in tunneling

Asghar RAHMATI,Lohrasb FARAMARZI,Manouchehr SANEI

《结构与土木工程前沿（英文）》 2014年 第8卷 第4期   页码 448-455 doi: 10.1007/s11709-014-0262-x

摘要： Rock mass classification system is very suitable for various engineering design and stability analysis. classification method is confirmed by Japan Highway Public Corporation that this method can figure out either strength or deformability of rock mass, further appropriating the amount of rock bolts, thickness of shotcrete, and size of pitch of steel ribs just after the blasting procedure. Based on these advantages of method, in this study, according to data of five deep and long tunnels in Iran, two equations for estimating the value of method from and classification systems were developed. These equations as a new method were able to optimize the support system for and classification systems. From classification and its application in these case studies, it is pointed out that the method for the design of support systems in underground working is more reliable than the and classification systems.

关键词： JH classification     Q and RMR classification     new method    

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抗白粉病基因 <i>Pm40i> 在我国“后 <i>Pm21i> 时代”小麦育种中的重要作用 Perspective

唐圣雯,胡玉亭,钟胜福,罗培高

《工程（英文）》 2018年 第4卷 第4期   页码 500-506 doi: 10.1016/j.eng.2018.06.004

摘要：

由小麦白粉菌[Blumeria graminis f. sp. tritici（Bgt）] 引起的小麦白粉病是一种重要的小麦叶部病害，对小麦的产量产生很大的影响。20 世纪80 年代，通过簇毛麦（Heuchera villosa）的6VS 染色体与小麦6AL 染色体易位将抗白粉病基因Pm21 转移到普通小麦中。最近，在一些地方发现了对Pm21 有毒的Bgt，虽然这些菌株的病理学特性还有待研究，但这一现象提醒小麦育种者应注意应用Pm21 的风险。来源于普通小麦与中间偃麦草（Thinopyrum intermedium）杂种后代的抗白粉病基因Pm40，被定位在小麦7BS 染色体上，对Bgt 具有广谱和持久的抗性。通过细胞学研究，并未在Pm40 的载体品种中发现大片段外缘染色体。过去几年的研究发现，Pm40 的载体品种具有优良的农艺性状。因此，我们相信在未来的育种工程中，Pm40 将会在Pm21 的抗性被克服之后起巨大的作用。另外，Pm21 和Pm40 都来源于外缘物种，这暗示着外源基因的抗性可能比小麦本身的基因更为持久和有效。

关键词： 小麦     白粉病     <i>Pm21i>     <i>Pm40i>     外源基因     内源抗性    

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NiFeRuO<i>xi> nanosheets on Ni foam as an electrocatalyst for efficient

《化学科学与工程前沿（英文）》 2023年 第17卷 第11期   页码 1698-1706 doi: 10.1007/s11705-023-2334-8

摘要： The electrocatalyst NiFeRuOx/NF, comprised of NiFeRuOx nanosheets grown on Ni foam, was synthesized using a hydrothermal process followed by thermal annealing. NiFeRuOx/NF displays high electrocatalytic activity and stability for overall alkaline seawater splitting: 98 mV@ 10 mA∙cm−2 in hydrogen evolution reaction, 318 mV@ 50 mA∙cm−2 in oxygen evolution reaction, and a cell voltage of 1.53 V@ 10 mA∙cm−2, as well as 20 h of durability. A solar-driven system containing such a bifunctional NiFeRuOx/NF has an almost 100% Faradaic efficiency. The NiFeRuOx coating around Ni foam is an anti-corrosion layer and also a critical factor for enhancement of bifunctional performances.

关键词： NiFeRuOx nanosheets     Ni foam     electrocatalysis     overall seawater splitting     solar-driven system    

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2014—2016年食品动物源RE-<i>cmeABCi>阳性弯曲菌流行与耐药性现状 Article

刘德俊, 刘蔚雯, 李星, 姚红, 沈张奇, 汪洋, 沈建忠

《工程（英文）》 2020年 第6卷 第1期   页码 34-39 doi: 10.1016/j.eng.2019.10.013

摘要：

弯曲菌是引起人类胃肠炎的一类重要食源性致病菌。RE-CmeABC是近年来弯曲菌中新发现的一种增强型耐药外排泵，可介导对兽医和人医临床治疗弯曲菌感染的重要药物，如氟喹诺酮类、酰胺醇类、大环内酯类及四环素类等药物的高水平耐药，而目前尚未有对该外排泵的大范围流行病学调查。因此，本研究调查了2014—2016年连续三年间我国山东、上海和广东等三个重点养殖区食品动物源RE-cmeABC阳性弯曲菌的流行与耐药性现状。结果显示，在1088株弯曲菌（931株结肠弯曲菌与157株空肠弯曲菌）中共检测出122株（11.2%）RE-cmeABC阳性菌株，包括111株（70.7%）空肠弯曲菌与11株（1.2%）结肠弯曲菌，空肠弯曲菌中RE-cmeABC的阳性率显著高于结肠弯曲菌。111株RE-cmeABC阳性空肠弯曲菌与46株RE-cmeABC阴性空肠弯曲菌相比在氟苯尼考、克林霉素和红霉素的耐药率上具有显著差异（P < 0.05），而在环丙沙星、四环素和庆大霉素的耐药率上无显著差异。然而，携带RE-cmeABC的菌株可以使环丙沙星与四环素对弯曲菌的MIC值分布趋于更高水平范围。脉冲场凝胶电泳分型（PFGE）结果显示RE-cmeABC阳性菌株在上海和广东地区以水平传播为主，在山东地区以克隆传播为主；三株分离于上海和广东的阳性菌为同一克隆型，4株分离于上海和山东的阳性菌为同一克隆型。本研究表明RE-cmeABC已在我国食品动物源弯曲菌中广泛流行，对公共卫生安全具有潜在威胁。

关键词： RE- <i> cmeABC i>     弯曲菌     环丙沙星     氟苯尼考    

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A highly efficient methodology for the preparation of

Yongxin Zhang, Shucheng Wang, Yaodong Huang

《化学科学与工程前沿（英文）》 2021年 第15卷 第3期   页码 679-686 doi: 10.1007/s11705-020-1979-9

摘要： A convenient and highly efficient method is described for the synthesis of -methoxycarbazole derivatives, including those with sterically demanding, benzannulated, or strongly electron-donating or -withdrawing substituents. Various -methoxycarbazole derivatives were directly prepared in good-to-moderate yields by the Pd (dba) CHCl /9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene-catalyzed reactions of the corresponding dibromobiphenyl compounds and methoxya-mine. Based on this methodology, the first total synthesis of 3,3′-[oxybis(methylene)]bis(9-methoxy-9 -carbazole), an antimicrobial dimeric carbazole alkaloid previously isolated from the stem bark of , was achieved in 18% yield over seven steps from 1,2-dibromobenzene.

关键词： N-methoxyl carbazole     dimeric N-methoxyl carbazole     alkaloid     total synthesis     double N-arylation of methoxyamine    

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通过<i> B i>位Ta置换对<i> AB i> O4型EuNbO4的热学和力学性质进行优化 Article

陈琳, 冯晶

《工程（英文）》 2020年 第6卷 第2期   页码 177-184 doi: 10.1016/j.eng.2019.12.006

摘要：

铁弹性的ABO4型RETaO4陶瓷和RENbO4陶瓷（RE表示稀土）是具有潜在应用价值的热障涂层（TBC）材料，研究人员正在对其进行大量研究。结果显示， RETaO4陶瓷的力学性质优于RENbO4陶瓷的力学性质。在本研究中，我们通过B位钽（Ta）置换对利用固相法（SSR）制备的EuNbO4陶瓷的热学和力学性质进行优化。我们使用X射线衍射（XRD）法和拉曼光谱技术对所制备的晶体结构进行确认，并利用扫描电子显微镜（SEM）对结构表面的微观形貌进行观察。结果表明，通过B位Ta置换可以有效提高EuNbO4陶瓷的杨氏模量和热膨胀系数（TEC），且其最大值分别为169 GPa和1.12×10−5 K−1（1200 ℃）； EuNbO4陶瓷的热导率被降低至1.52 W·K–1·m–1（700 ℃），且材料的抗热辐射能力得到了改善。我们建立了声子热扩散系数与温度之间的关系，用以通过消除热辐射效应来确定声子本征热导率。研究结果表明，通过B位Ta置换能够有效优化EuNbO4的热学和力学性质，从而使得此种材料在将来可成为一种高温结构陶瓷材料。

关键词： 热障涂层，稀土铌酸盐，置换，热导率，热膨胀系数，杨氏模量    

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Traces and echoes of <i>De Architecturai> by Marcus Vitruvius Pollio in the work of Xu Guangqi in 17th

Michela CIGOLA,Yibing FANG

《机械工程前沿（英文）》 2016年 第11卷 第1期   页码 3-11 doi: 10.1007/s11465-015-0359-5

摘要：

This study aims to investigate the role played by Xu Guangqi (1562–1633), minister of the Ming Dynasty, in the development of European scientific and technical knowledge in China between the 16th and 17th centuries by analyzing a book of Western technology that he wrote, namely, Taixi Shuifa (On Western Hydraulics). Several Western books related to machine knowledge are searched to trace the source of the illustrations in Taixi Shuifa. We found that Archimedes’ screw and Ctesibius’ machine, which are included in Vitruvius’ De Architectura volumes, also appear in the work of Xu Guangqi.

关键词： Vitruvius’ De Architectura     Xu Guangqi’s Taixi Shuifa     Jesuit missionaries     Italian Renaissance     drawing     representation    

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Accounting for the uncertainties in the estimation of average shear wave velocity using – correlations

《结构与土木工程前沿（英文）》 2021年 第15卷 第5期   页码 1199-1208 doi: 10.1007/s11709-021-0749-1

摘要： Site-specific seismic hazard analysis is crucial for designing earthquake resistance structures, particularly in seismically active regions. Shear wave velocity ( V S) is a key parameter in such analysis, although the economy and other factors restrict its direct field measurement in many cases. Various V S–SPT– N correlations are routinely incorporated in seismic hazard analysis to estimate the value of V S. However, many uncertainties question the reliability of these estimated V S values. This paper comes up with a statistical approach to take care of such uncertainties involved in V S calculations. The measured SPT– N values from all the critical boreholes were converted into statistical parameters and passed through various correlations to estimate V S at different depths. The effect of different soil layers in the boreholes on the Vs estimation was also taken into account. Further, the average shear wave velocity of the top 30 m soil cover ( V S30) is estimated after accounting for various epistemic and aleatoric uncertainties. The scattering nature of the V S values estimated using different V S– N correlations was reduced significantly with the application of the methodology. Study results further clearly demonstrated the potential of the approach to eliminate various uncertainties involved in the estimation of V S30 using general and soil-specific correlations.

关键词： uncertainties     V S– N correlations     V S30     SPT data     statistical methodology    

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<i>RR1i> and <i>RR2i> gene deletion affects the immunogenicity of a live attenuated pseudorabies

Shijun YAN,He YAN,Chaolin ZHANG,Tongyan WANG,Qingyuan YANG,Zhe SUN,Yan XIAO,Feifei TAN,Xiangdong LI,Kegong TIAN

《农业科学与工程前沿（英文）》 2016年 第3卷 第1期   页码 81-86 doi: 10.15302/J-FASE-2016088

摘要： As virulence-determining genes, and encode the small subunit and large subunit of viral ribonucleotide reductase (RR) in pseudorabies virus which have been extensively studied in mice. However, their role in pigs has not been adequately investigated. In this study, we deleted and genes based on a / / triple gene-deleted pseudorabies virus and tested its efficacy in pigs as a vaccine candidate. The rescued virus showed similar growth properties and plaque size as its parent strain. In an animal study, the virus could elicit humoral immune responses shown by generation of gB-specific antibodies and virus neutralizing antibodies. However, vaccination could not provide protection against virulent pseudorabies virus challenge since vaccinated pigs showed clinical pseudorabies-specific syndromes. The deficiency in protection may due to the generation of late and low levels of gB antibodies and virus neutralizing antibodies.

关键词： pseudorabies virus     RR1 and RR2     ribonucleotide reductase     vaccine candidate    

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Efficient acetoin production from pyruvate by engineered whole-cell biocatalysis

《化学科学与工程前沿（英文）》 2023年 第17卷 第4期   页码 425-436 doi: 10.1007/s11705-022-2229-0

摘要： Acetoin is an important platform chemical, which has a wide range of applications in many industries. Halomonas bluephagenesis, a chassis for next generation of industrial biotechnology, has advantages of fast growth and high tolerance to organic acid salts and alkaline environment. Here, α-acetolactate synthase and α-acetolactate decarboxylase from Bacillus subtilis 168 were co-expressed in H. bluephagenesis to produce acetoin from pyruvate. After reaction condition optimization and further increase of α-acetolactate decarboxylase expression, acetoin production and yield were significantly enhanced to 223.4 mmol·L–1 and 0.491 mol·mol–1 from 125.4 mmol·L–1 and 0.333 mol·mol–1, respectively. Finally, the highest titer of 974.3 mmol·L–1 (85.84 g·L–1) of acetoin was accumulated from 2143.4 mmol·L–1 (188.6 g·L–1) of pyruvic acid within 8 h in fed-batch bioconversion under optimal reaction conditions. Moreover, the reusability of the cell catalysis was also tested, and the result illustrated that the whole-cell catalysis obtained 433.3, 440.2, 379.0, 442.8 and 339.4 mmol·L–1 (38.2, 38.8, 33.4, 39.0 and 29.9 g·L–1) acetoin in five repeated cycles under the same conditions. This work therefore provided an efficient H. bluephagenesis whole-cell catalysis with a broad development prospect in biosynthesis of acetoin.

关键词： acetoin     pyruvate     α-acetolactate synthetase     α-acetolactate decarboxylase     Halomonas bluephagenesis     whole-cell biocatalysis    

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High frequency of alternative splicing variants of the oncogene in neuroendocrine tumors of the pancreas and breast

《医学前沿（英文）》   页码 907-923 doi: 10.1007/s11684-023-1009-7

摘要： The characteristic genetic abnormality of neuroendocrine neoplasms (NENs), a heterogeneous group of tumors found in various organs, remains to be identified. Here, based on the analysis of the splicing variants of an oncogene Focal Adhesion Kinase (FAK) in The Cancer Genome Atlas datasets that contain 9193 patients of 33 cancer subtypes, we found that Box 6/Box 7-containing FAK variants (FAK6/7) were observed in 7 (87.5%) of 8 pancreatic neuroendocrine carcinomas and 20 (11.76%) of 170 pancreatic ductal adenocarcinomas (PDACs). We tested FAK variants in 157 tumor samples collected from Chinese patients with pancreatic tumors, and found that FAK6/7 was positive in 34 (75.6%) of 45 pancreatic NENs, 19 (47.5%) of 40 pancreatic solid pseudopapillary neoplasms, and 2 (2.9%) of 69 PDACs. We further tested FAK splicing variants in breast neuroendocrine carcinoma (BrNECs), and found that FAK6/7 was positive in 14 (93.3%) of 15 BrNECs but 0 in 23 non-NEC breast cancers. We explored the underlying mechanisms and found that a splicing factor serine/arginine repetitive matrix protein 4 (SRRM4) was overexpressed in FAK6/7-positive pancreatic tumors and breast tumors, which promoted the formation of FAK6/7 in cells. These results suggested that FAK6/7 could be a biomarker of NENs and represent a potential therapeutic target for these orphan diseases.

关键词： FAK6/7     SRRM4     neuroendocrine neoplasms     pancreas     breast    

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