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| 1 | Inhibition of SARS-CoV-2 (previously 2019-nCoV) infection by a highly potent pan-coronavirus fusion inhibitor targeting its spike protein that harbors a high capacity to mediate membrane fusion显示文摘The recent outbreak of coronavirus disease(COVID-19)caused by SARS-CoV-2 infection in Wuhan,China has posed a serious threat to global public health.To develop specific anti-coronavirus therapeutics and prophylactics,the molecular mechanism that underlies viral infection must first be defined.Therefore,we herein established a SARS-CoV-2 spike(S)protein-mediated cell-cell fusion assay and found that SARS-CoV-2 showed a superior plasma membrane fusion capacity compared to that of SARS-CoV.We solved the X-ray crystal structure of six-helical bundle(6-HB)core of the HR1 and HR2 domains in the SARS-CoV-2 S protein S2 subunit revealing that several mutated amino acid residues in the HR1 domain may be associated with enhanced interactions with the HR2 domain.We previously developed a pan-coronavirus fusion inhibitor,EK1,which targeted the HR!domain and could inhibit infection by divergent human coronaviruses tested,including SARS-CoV and MERS-CoV.Here we generated a series of lipopeptides derived from EK1 and found that EK1C4 was the most potent fusion inhibitor against SARS-CoV-2 S protein-mediated membrane fusion and pseudovirus infection with IC50s of 1.3 and 15.8 nM,about 241-and 149-fold more potent than the original EK1 peptide,respectively.EK1C4 was also highly effective against membrane fusion and infection of other human coronavirus pseudoviruses tested,including SARS-CoV and MERS-CoV,as well as SARSr-CoVs,and potently inhibited the replication of 5 live human coronaviruses examined,including SARS-CoV-2.Intranasal application of EK1C4 before or after challenge with HCoV-OC43 protected mice from infection,suggesting that EK1C4 could be used for prevention and treatment of infection by the currently circulating SARS-CoV-2 and other emerging SARSr-CoVs. | Shuai Xia Meiqin Liu Chao Wang Wei Xu Qiaoshuai Lan Siliang Feng Feifei Qi Linlin Bao Lanying Du Shuwen Liu Chuan Qin Fei Sun Zhengli Shi Yun Zhu Shibo Jiang Lu Lu | 2020 | Cell Research2020，30，4： | 81 |
| 2 | Emergence and prevalence of naturally occurring lower virulent African swine fever viruses in domestic pigs in China in 2020显示文摘African swine fever virus(ASFV)has been circulating in China for more than two years,and it is not clear whether the biological properties of the virus have changed.Here,we report on our surveillance of ASFVs in seven provinces of China,from June to December,2020.A total of 22 viruses were isolated and characterized as genotype II ASFVs,with mutations,deletions,insertions,or short-fragment replacement occurring in all isolates compared with Pig/HLJ/2018(HLJ/18),the earliest isolate in China.Eleven isolates had four different types of natural mutations or deletion in the EP402R gene and displayed a nonhemadsorbing(non-HAD)phenotype.Four isolates were tested for virulence in pigs;two were found to be as highly lethal as HLJ/18.However,two non-HAD isolates showed lower virulence but were highly transmissible;infection with 106 TCID50 dose was partially lethal and caused acute or sub-acute disease,whereas 103 TCID50 dose caused non-lethal,sub-acute or chronic disease,and persistent infection.The emergence of lower virulent natural mutants brings greater difficulty to the early diagnosis of ASF and creates new challenges for ASFV control. | Encheng Sun Zhenjiang Zhang Zilong Wang Xijun He Xianfeng Zhang Lulu Wang Wenqing Wang Lianyu Huang Fei Xi Haoyue Huangfu Ghebremedhin Tsegay Hong Huo Jianhong Sun Zhijun Tian Wei Xia Xuewu Yu Fang Li Renqiang Liu Yuntao Guan Dongming Zhao Zhigao Bu | 2021 | Science China(Life Sciences)2021，64，5： | 46 |
| 3 | The Dose-response of Intrathecal Ropivacaine Co-administered with Sufentanil for Cesarean Delivery under Combined Spinal-epidural Anesthesia in Patients with Scarred Uterus显示文摘 | Fei Xiao Wen-Ping Xu Yin-Fa Zhang Lin Liu Xia Liu Li-Zhong Wang | 2015 | Chinese Medical Journal2015，，19： | 35 |
| 4 | Overexpression of Aurora-A kinase promotes tumor cell proliferation and inhibits apoptosis in esophageal squamous cell carcinoma cell line显示文摘曙光 A kinase, serine/threonine 蛋白质 kinase,是潜在的 oncogene。扩大并且在人的肿瘤的几种类型在曙光 A 的表示上被发现了,包括的食道的有鳞的房间癌(ESCC ) 。在表示曙光 A 上的房间对导致 cisplatin 的 apoptosis 更抵抗,这被表明了。然而,调停的分子的机制这些效果仍然保持大部分未知。在这份报告,我们证明在通过在人的 ESCC KYSE150 的 pEGFP-Aurora-A 的稳定的 transfection 的曙光 A 的表示上,房间显著地支持了房间增长并且禁止了 cisplatin- 或紫外导致照耀的 apoptosis。caspase-3 并且 poly 的劈开(自动数据处理核糖) 在在表示房间上的曙光 A 的聚合酶(PARP ) 实质地在 cisplatin 或紫外处理以后被减少。而且,我们发现有 siRNA 的内长的曙光 A kinase 的那 silencing 实质地提高了敏感到导致 cisplatin 或在人的 ESCC EC9706 房间的紫外导致 apoptosis。在平行,在曙光 A 的表示上 potently 起来调整了 Bcl-2 的表示。而且,由废除的 siRNA 的 Bcl-2 击倒 Aurora-A 禁止 apoptosis 上的效果。总起来说,这些数据提供证据在支持房间增长并且禁止 apoptosis 的表示上的那曙光 A,建议是的新奇机制仔细与恶意的显型和 ESCC 房间的反癌症药抵抗有关。 | Xiao Xia Wang Rong Liu Shun Qian Jin Fei Yue Fan Qi Min Zhan | 2006 | Cell Research2006，16，4： | 24 |
| 5 | The Chinese Society of Clinical Oncology(CSCO)clinical guidelines for the diagnosis and treatment of nasopharyngeal carcinoma显示文摘Nasopharyngeal carcinoma(NPC)is a malignant epithelial tumor originating in the nasopharynx and has a high incidence in Southeast Asia and North Africa.To develop these comprehensive guidelines for the diagnosis and management of NPC,the Chinese Society of Clinical Oncology(CSCO)arranged a multi-disciplinary team comprising of experts from all sub-specialties of NPC to write,discuss,and revise the guidelines.Based on the findings of evidencebased medicine in China and abroad,domestic experts have iteratively developed these guidelines to provide proper management of NPC.Overall,the guidelines describe the screening,clinical and pathological diagnosis,staging and risk assessment,therapies,and follow-up of NPC,which aim to improve the management of NPC. | Ling-Long Tang Yu-Pei Chen Chuan-Ben Chen Ming-Yuan Chen Nian-Yong Chen Xiao-Zhong Chen Xiao-Jing Du Wen-Feng Fang Mei Feng Jin Gao Fei Han Xia He Chao-Su Hu De-sheng Hu Guang-Yuan Hu Hao Jiang Wei Jiang Feng Jin Jin-Yi Lang Jin-Gao Li Shao-Jun Lin Xu Liu Qiu-Fang Liu Lin Ma Hai-Qiang Mai Ji-Yong Qin Liang-Fang Shen Ying Sun Pei-Guo Wang Ren-Sheng Wang Ruo-Zheng Wang Xiao-Shen Wang Ying Wang Hui Wu Yun-Fei Xia Shao-Wen Xiao Kun-Yu Yang Jun-Lin Yi Xiao-Dong Zhu Jun Ma | 2021 | Cancer Communications2021，41，11： | 22 |
| 6 | Studies on classification,criteria and control of rockbursts显示文摘This paper attempts to present the findings involving rockbursts classification,rockburst failure criteria,and related control measures.Experimental investigations were performed using the strainburst testing machine and impact-induced rockburst testing machine.According to the stress paths and experimental methods,rockbursts were classified into two major groups,i.e.the strainbursts and impact-induced bursts.The mechanisms and criteria of rockburst obtained from experimental investigations were discussed.Then,the developments of constant-resistance and large-deformation bolt(CRLDB),which can adapt itself to the external loading at a constant resistance by elongating continually,were introduced.The deformation energy of country rocks with large deformation can be absorbed by CRLDBs.Finally,the principles and the experimental results for control and prevention of rockburst using the CRLDBs were presented. | Manchao He Hongman Xia Xuena Jia Weili Gong Fei Zhao Kangyuan Liang | 2012 | Journal of Rock Mechanics and Geotechnical Engineering2012，4，2： | 21 |
| 7 | Special Section:SARS-CoV-2 Preliminary evidence from a multicenter prospective observational study of the safety and efficacy of chloroquine for the treatment of COVID-19显示文摘Effective therapies are urgently needed for the SARS-CoV-2 pandemic.Chloroquine has been proved to have antiviral effect against coronavirus in vitro.In this study,we aimed to assess the efficacy and safety of chloroquine with different doses in COVID-19.In this multicenter prospective observational study,we enrolled patients older than 18 years old with confirmed SARS-CoV-2 infection excluding critical cases from 12 hospitals in Guangdong and Hubei Provinces.Eligible patients received chloroquinephosphate s00 mg,orally,once(half dose)or twice(full dose)daily.Patients treated with non-chloroquine therapy were included as historical controls.The primary endpoint is the time to undetectable viral RNA.Secondary outcomes include the proportion of patients with undetectable viral RNA by day 10 and 14,hospitalization time,duration of fever,and adverse events.A total of 197 patients completed chloroquine treatment,and 176patients were included as historical controls.The median time to achieve an undetectable viral RNA was shorter in chloroquine than in non-chloroquine(absolute difference in medians-6.0 days;95%CI-6.0 to—4.0).The duration of fever is shorter in chloroquine(geometric mean ratio 0.6;95%CIO.5 to 0.8).No serious adverse events were observed in the chloroquine group.Patients treated with half dose experienced lower rate of adverse events than with full dose.Although randomized trials are needed for further evaluation,this study provides evidence for safety and efficacy of chloroquine in COVID-19 and suggests that chloroquine can be a cost-effective therapy for combating the COVID-19 pandemic. | Mingxing Huang Man Li Fei Xiao Pengfei Pang Jiabi Liang Tiantian Tang Shaoxuan Liu Binghui Chen Jingxian Shu Yingying You Yang Li Meiwen Tang Jianhui Zhou Guanmin Jiang Jingfen Xiang Wenxin Hong Songmei He Zhaoqin Wang Jianhua Feng Changqing Lin Yinong Ye Zhilong Wu Yaocai Li Bei Zhong Ruilin Sun Zhongsi Hong Jing Liu Huili Chen Xiaohua Wang Zhonghe Li Duanqing Pei Lin Tian Jinyu Xia Shanping Jiang Nanshan Zhong Hong Shan | 2020 | National Science Review2020，7，9： | 20 |
| 8 | The influence of stage at diagnosis and molecular subtype on breast cancer patient survival: a hospital.based multi.center study显示文摘Background: Stage at diagnosis and molecular subtype are important clinical factors associated with breast cancer patient survival. However, subgroup survival data from a large study sample are limited in China.To estimate the survival differences among patients with different stages and various subtypes of breast cancer, we conducted a hospital-based multi-center study on breast cancer in Beijing, China.Methods: All resident patients diagnosed with primary, invasive breast cancer between January 1,2006 and December 31,2010 from four selected hospitals in Beijing were included and followed up until December 31,2015. Hospitalbased data of stage at diagnosis, hormone receptor status, and selected clinical characteristics, including body mass index(BMI), menopausal status, histological grade, and histological type, were collected from the medical records of the study subjects. Overall survival(OS) and cancer-specific survival(CSS) were estimated. Cox proportional hazards models were employed to evaluate the associations of stage at diagnosis and molecular subtype with patient survival.Results: The 5-year OS and CSS rates for all patients were 89.4% and 90.3%. Survival varied by stage and molecular subtype. The 5-year OS rates for patients with stage I, Ⅱ, Ⅲ, and IV diseases were 96.5%, 91.6%, 74.8%, and 40.7%,respectively, and the corresponding estimates of 5-year CSS rates were 97.1%, 92.6%, 75.6%, and 42.7%, respectively.The 5-year OS rates for patients with luminal A, luminal B, HER2, and triple-negative subtypes of breast cancer were92.6%, 88.4%, 83.6%, and 82.9%, respectively, and the corresponding estimates of 5-year CSS rates were 93.2%, 89.1 %,85.4%, and 83.5%, respectively. Multivariate analysis showed that stage at diagnosis and molecular subtype were important prognostic factors for breast cancer.Conclusions: Survival of breast cancer patients varied significantly by stage and molecular subtype. Cancer screening is encouraged for the early detection and early diagnosis of breast cancer. More advanced therapies and health care policies are needed on HER2 and triple-negative subtypes. | Tingting Zuo Hongmei Zeng Huichao Li Shuo Liu Lei Yang Changfa Xia Rongshou Zheng Fei Ma Lifang Liu Ning Wang Lixue Xuan Wanqing Chen | 2017 | Chinese Journal of Cancer2017，36，11： | 18 |
| 9 | A comparison of two kinds of eastward-moving mesoscale vortices during the mei-yu period of 2010显示文摘During the mei-yu period,the east edge of the Tibetan Plateau and the Dabie Mountain are two main sources of eastward-moving mesoscale vortices along the mei-yu front(MYF).In this study,an eastward-moving southwest vortex(SWV) and an eastward-moving Dabie vortex(DBV) during the mei-yu period of 2010 have been investigated to clarify the main similarities and differences between them.The synoptic analyses reveal that the SWV and DBV were both located at the lower troposphere;however,the SWV developed in a 'from top down' trend,whereas the DBV developed in an opposite way.There were obvious surface closed low centers corresponding to the DBV during its life span,whereas for the SWV,the closed low center only appeared at the mature stage.Cold and warm air intersected intensely after the formation of both the vortices,and the cold advection in the SWV case was stronger than that in the DBV case,whereas the warm advection in the DBV case was more intense than that in the SWV case.The Bay of Bengal and the South China Sea were main moisture sources for the SWV,whereas for the DBV,in addition to the above two moisture sources,the East China Sea was also an important moisture source.The vorticity budget indicates that the convergence was the most important common factor conducive to the formation,development,and maintenance of the SWV and DBV,whereas the conversion from the vertical vorticity to the horizontal one(tilting) was the most important common factor caused the dissipation of both of the vortices.The kinetic energy(KE) budget reveals that the KE generation by the rotational wind was the dominant factor for the enhancement of KE associated with the SWV,whereas for the DBV,the KE transport by the rotational wind was more important than the KE generation.The KE associated with the SWV and the DBV weakened with different mechanisms during the decaying stage.Furthermore,the characteristics of baroclinic and barotropic energy conversions during the life spans of both vortices indicate that the SWV and DBV both belong to the kind of subtropical mesoscale vortices. | FU ShenMing YU Fei WANG DongHai XIA RuDi | 2013 | Science China Earth Sciences2013，56，2： | 18 |
| 10 | Functional recovery following traumatic spinal cord injury mediated by a unique polymer scaffold seeded with neural stem cells and Schwann cells显示文摘背景最重要的目的在受伤针的绳索移植研究是为 axonal 生长提供有利环境。而且,新接枝的持续发现正在提供新潜在地有趣移植候选人。我们的目的是观察神经干细胞(NSC ) 的合作移植的词法、功能的修理效果, Schwann 装壁板圩(SC ) 并且 poly rats.Methods 的针的绳索损害上的 lactide-co-glycolide 酸(PLGA ) PLGA 的脚手架被制作。NSC 和 SC 是有教养的,与用 5-bromodeoxyuridine 标记的 NSC,并且 NSC/PLGA 或 NSC+SCs/PLGA 的建筑群被构造。36 只 Wistar 老鼠随机被划分成三个组:组织 A (PLGA 的移植) ,组织 B (NSC/PLGA 的移植) 并且组织 C (NSC+SCs/PLGA 的移植) 。正确 hemicord 的 3 公里长度在所有老鼠在显微镜下面被移开。PLGA 或 PLGA-celIs 的建筑群被植入进损害地点。Basso-Beattie-Bresnahan (BBB ) 运动分数,马达和更低的手足潜在的唤起的 somatosensory 被检验听说康复感觉并且在在损害以后的 4 个星期, 8 个星期, 12 个星期和 24 个星期的马达功能。所有恢复针的绳索损害( SCI )纸巾被观察与他染色, immunohistochemistry ,和 transelectronmicroscopy 到在 4 个星期识别移植房间和神经纤维的新生的幸存,迁居和区别, 8 个星期,在到在损害以后的 24 个星期的从 4 个星期的 injury.Results ( 1 )以后的 12 个星期和 24 个星期,移植房间的组的 BBB 运动分数比 non-cell-transplanted 组的那些好,特别组 C ( P 0.05 )。somatosensory 的振幅唤起了潜力(9 月) ,唤起马达的潜力(MEP ) 在组 B 和 C 在损害以后被改进,但是在 4 个星期的 9 月和 MEP 的振幅在损害以后在 12 个星期和 24 个星期是比那低的。与组 B 相比,在组 C 的 9 月和 MEP 的振幅被改进。9 月和 MEP 的振幅没在组 A 在损害以后被改进。(2 ) 他染色表明支架的体积减少了,在支架的房间的数字增加了。成长得最新的 capillaries 能也被看见。染色的 Immunohistochemistry 证明移植 NSC 能幸存并且移居直到 24 个星期和他们能区分进神经原和 oligodendrocytes。改革轴突与 transelectronmicroscopy 在支架房间建筑群被观察。上述表明在在损害,和他们能区分进各种各样的神经房间以后,移植 NSC 能在老鼠的针的绳索熬过并且移居直到 24 个星期的组 C.Conclusions 是更广泛的。cells/PLGA 的合作移植能支持受伤针的绳索的功能的恢复。共同移植的效果 NSC+SCs/PLGA 比独自移植 NSC/PLGA 好。 | CHEN Gang HU Yan-rong WAN Hong XIA Lei LI Jun-hua YANG Fei QU Xue WANG Shen-guo WANG Zhong-cheng | 2010 | Chinese Medical Journal2010，，17： | 16 |
| 11 | Nonlinear dynamic analysis of cantilevered piezoelectric energy harvesters under simultaneous parametric and external excitations显示文摘The nonlinear dynamics of cantilevered piezoelectric beams is investigated under simultaneous parametric and external excitations. The beam is composed of a substrate and two piezoelectric layers and assumed as an Euler–Bernoulli model with inextensible deformation. A nonlinear distributed parameter model of cantilevered piezoelectric energy harvesters is proposed using the generalized Hamilton's principle. The proposed model includes geometric and inertia nonlinearity, but neglects the material nonlinearity. Using the Galerkin decomposition method and harmonic balance method, analytical expressions of the frequency–response curves are presented when the first bending mode of the beam plays a dominant role. Using these expressions, we investigate the effects of the damping, load resistance, electromechanical coupling, and excitation amplitude on the frequency–response curves. We also study the difference between the nonlinear lumped-parameter and distributedparameter model for predicting the performance of the energy harvesting system. Only in the case of parametric excitation, we demonstrate that the energy harvesting system has an initiation excitation threshold below which no energy can be harvested.We also illustrate that the damping and load resistance affect the initiation excitation threshold. | Fei Fang Guanghui Xia Jianguo Wang | 2018 | Acta Mechanica Sinica2018，34，3： | 16 |
| 12 | Local and global approaches of affinity propagation clustering for large scale data显示文摘Recently a new clustering algorithm called 'affinity propagation' (AP) has been proposed, which efficiently clustered sparsely related data by passing messages between data points. However, we want to cluster large scale data where the similarities are not sparse in many cases. This paper presents two variants of AP for grouping large scale data with a dense similarity matrix. The local approach is partition affinity propagation (PAP) and the global method is landmark affinity propagation (LAP). PAP passes messages in the subsets of data first and then merges them as the number of initial step of iterations; it can effectively reduce the number of iterations of clustering. LAP passes messages between the landmark data points first and then clusters non-landmark data points; it is a large global approximation method to speed up clustering. Experiments are conducted on many datasets, such as random data points, manifold subspaces, images of faces and Chinese calligraphy, and the results demonstrate that the two ap-proaches are feasible and practicable. | Ding-yin XIA Fei WU Xu-qing ZHAN Yue-ting ZHUANG | 2008 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2008，9，10： | 15 |
| 13 | Co-transplantation of neural stem cells and Schwann cells within poly (L-lactic-co-glycolic acid) scaffolds facilitates axonal regeneration in hemisected rat spinal cord显示文摘 | XIA Lei WAN Hong HAO Shu-yu LI De-zhi CHEN Gang GAO Chuan-chuan LI Jun-hua YANG Fei WANG Shen-guo LIU Song | 2013 | Chinese Medical Journal2013，，5： | 15 |
| 14 | Effects of warming and clipping on plant and soil properties of an alpine meadow in the Qinghai-Tibetan Plateau, China显示文摘Climate warming and livestock grazing are known to have great influences on alpine ecosystems like those of the Qinghai-Tibetan Plateau(QTP) in China. However, it is lacking of studies on the effects of warming and grazing on plant and soil properties in these alpine ecosystems. In this study, we reported the related research from manipulative experiment in 2010–2012 in the QTP. The aim of this study was to investigate the individual and combined effects of warming and clipping on plant and soil properties in the alpine meadow ecosystem. Infrared radiators were used to simulate climate warming starting in July 2010, while clipping was performed once in October 2011 to simulate the local livestock grazing. The experiment was designed as a randomized block consisting of five replications and four treatments: control(CK), warming(W), clipping(C) and warming+clipping combination(WC). The plant and soil properties were investigated in the growing season of the alpine meadow in 2012. The results showed that W and WC treatments significantly decreased relative humidity at 20-cm height above ground as well as significantly increases air temperature at the same height, surface temperature, and soil temperature at the depth of 0–30 cm. However, the C treatment did not significantly decrease soil moisture and soil temperature at the depth of 0–60 cm. Relative to CK, vegetation height and species number increased significantly in W and WC treatment, respectively, while vegetation aboveground biomass decreased significantly in C treatment in the early growing season. However, vegetation cover, species diversity, belowground biomass and soil properties at the depth of 0–30 cm did not differ significantly in W, C and WC treatments. Soil moisture increased at the depth of 40–100 cm in W and WC treatments, while belowground biomass, soil activated carbon, organic carbon and total nitrogen increased in the 30–50 cm soil layer in W, C and WC treatments. Although the initial responses of plant and soil properties to experimental warming and clipping were slow and weak, the drought induced by the downward shift of soil moisture in the upper soil layers may induce plant belowground biomass to transfer to the deeper soil layers. This movement would modify the distributions of soil activated carbon, organic carbon and total nitrogen. However, long-term data collection is needed to further explain this interesting phenomenon. | Man Hou XU Fei PENG Quan Gang YOU Jian GUO Xia Fei TIAN Min LIU Xian XUE | 2015 | Journal of Arid Land2015，7，2： | 14 |
| 15 | Celastrol induces ferroptosis in activated HSCs to ameliorate hepatic fibrosis via targeting peroxiredoxins and HO-1显示文摘Ferroptosis is a form of regulated cell death, characterized by excessive membrane lipid peroxidation in an iron-and ROS-dependent manner. Celastrol, a natural bioactive triterpenoid extracted from Tripterygium wilfordii, shows effective anti-fibrotic and anti-inflammatory activities in multiple hepatic diseases. However, the exact molecular mechanisms of action and the direct protein targets of celastrol in the treatment of liver fibrosis remain largely elusive. Here, we discover that celastrol exerts anti-fibrotic effects via promoting the production of reactive oxygen species(ROS) and inducing ferroptosis in activated hepatic stellate cells(HSCs). By using activity-based protein profiling(ABPP) in combination with bio-orthogonal click chemistry reaction and cellular thermal shift assay(CETSA), we show that celastrol directly binds to peroxiredoxins(PRDXs), including PRDX1, PRDX2, PRDX4 and PRDX6,through the active cysteine sites, and inhibits their anti-oxidant activities. Celastrol also targets to heme oxygenase 1(HO-1) and upregulates its expression in activated-HSCs. Knockdown of PRDX1, PRDX2,PRDX4, PRDX6 or HO-1 in HSCs, to varying extent, elevated cellular ROS levels and induced ferroptosis. Taken together, our findings reveal the direct protein targets and molecular mechanisms via which celastrol ameliorates hepatic fibrosis, thus supporting the further development of celastrol as a promising therapeutic agent for liver fibrosis. | Piao Luo Dandan Liu Qian Zhang Fan Yang Yin-Kwan Wong Fei Xia Junzhe Zhang Jiayun Chen Ya Tian Chuanbin Yang Lingyun Dai Han-Ming Shen Jigang Wang | 2022 | Acta Pharmaceutica Sinica B2022，12，5： | 14 |
| 16 | Antioxidant and immunomodulatory activities of a polysaccharide from Flammulina velutipes显示文摘OBJECTIVE: To evaluate the antioxidant and immunomodulatory activities of a unique polysaccharide from the medicinal fungus Flammulina velutipes in vitro.METHODS: Using water extraction and alcohol precipitation, crude polysaccharides were obtained. After purification by DEAE-cellulose 52 ion exchange chromatography and Sephacryl S-300 HR gel filtration chromatography, High performance liquid chromatography equipped with evaporative light-scattering detector, Infrared radiation and Nuclear magnetic resonance were used to evaluate the structure of the polysaccharide. Its immunomodulatory activity was measured by examining the production of nitric oxide(NO) and cytokine secretion, and via lymphocyte proliferation experiments. Its effects on the scavenging activities of hydroxyl radical, superoxide anion and reducing power were also measured.RESULTS: A water-soluble polysaccharide, Flammulina velutipes polysaccharide I-A(FVP I-A), was obtained with a molecular mass of 8.14×104Da determined by high performance gel permeation chromatography. An in vitro antioxidant assay indicated that FVP I-A could scavenge hydroxyl radical, superoxide anion and possessed reducing power and could largely promote NO production and augment the interleukin-1β, interleukin-6, and tumor necrosis factor-α secretion by RAW264.7 macrophages(P<0.05). Moreover, FVP I-A could promote lymphocyte proliferation(P<0.05), and synergistically enhance the augmentation of the proliferation of mouse lymphocytes by concanavalin A and lipopolysaccharides(P<0.01, P<0.05).CONCLUSION: The FVP I-A obtained from Flammulina velutipes possessed antioxidant activity and could enhance non-specific and specific immune responses in vitro. | Ming Wu Xia Luo Xiaoyan Xu Wei Wei Mengyao Yu Nan Jiang Liming Ye Zhirong Yang Xiaofan Fei | 2014 | Journal of Traditional Chinese Medicine2014，34，6： | 14 |
| 17 | Seroepidemiological Investigation of Lyme Disease and Human Granulocytic Anaplasmosis among People Living in Forest Areas of Eight Provinces in China显示文摘Objective Lyme disease and Human granulocytic anaplasmosis are tick‐borne diseases caused by Borrelia burgdorferi and Anaplasma phagocytophilum respectively. We have investigated infection and co-infection of the two diseases in the population of forest areas of eight provinces in China by measuring seroprevalence of antibodies against B. burgdorferi and A. phagocytophilum. Methods Forest areas in 8 provinces were chosen for investigation using whole sampling and questionnaire survey methods. 3 669 serum samples from people in the forest areas were tested for the presence of antibodies by indirect immunofluorescent assay (IFA). Results Seroprevalence against B. burgdorferi was 3% to 15% and against A. phagocytophilum was 2% to 18% in the study sites in the 8 provinces in China. We also found co-infection of B. burgdorferi and A. phagocytophilum in 7 of the 8 provinces (the exception being the Miyun area in Beijing). The seroprevalence for both B. burgdorferi and A. phagocytophilum was significantly higher among people exposed to ticks than among people who were not exposed to ticks. Conclusion We conclude that both pathogens are endemic in the forest areas in the eight provinces, but the prevalence of B. burgdorferi and A. phagocytophilum differs between the provinces. | HAO Qin GENG Zhen HOU Xue Xia TIAN Zhen YANG Xiu Jun JIANG Wei Jia SHI Yan ZHAN Zhi Fei LI Guo Hua YU De Shan WANG Hua Yong XU Jian Guo WAN Kang Lin | 2013 | Biomedical and Environmental Sciences2013，26，3： | 13 |
| 18 | Parthenogenetic haploid embryonic stem cells produce fertile mice显示文摘 | Haifeng Wan Zhengquan He Mingzhu Dong Tiantian Gu Guan-Zheng Luo Fei Teng Baolong Xia Wei Li Chunjing Feng Xin Li Tianda Li Ling Shua Rui Fu Liu Wang Xiu-Jie Wang Xiao-Yang Zhao Qi Zhou | 2013 | Cell Research2013，23，11： | 13 |
| 19 | Biochemical Mechanism of Chlorantraniliprole Resistance in the Diamondback Moth, Plutella xylostella Linnaeus显示文摘The insecticide chlorantraniliprole exhibits good efficacy and plays an important role in controlling the diamondback moth, Plutella xylostella Linnaeus. However, resistance to chlorantraniliprole has been observed recently in some field populations. At present study, diamondback moths with resistance to chlorantraniliprole(resistant ratio(RR) was 82.18) for biochemical assays were selected. The assays were performed to determine potential resistance mechanisms. The results showed that the selected resistant moths(GDLZ-R) and susceptible moth could be synergized by known metabolic inhibitors such as piperonyl butoxide(PBO), triphenyl phosphate(TPP) and diethyl-maleate(DEM) at different levels(1.68-5.50-fold and 2.20-2.89-fold, respectively), and DEM showed the maximum synergism in both strains. In enzymes assays, a high level of glutathione-S-transferase(GST) was observed in the resistant moth, in contrast, moths that are susceptible to the insecticide had only 1/3 the GST activity of the resistant moths. The analysis of short-term exposure of chlorantraniliprole on biochemical response in the resistant strain also showed that GST activity was significantly elevated after exposure to a sub-lethal concentration of chlorantraniliprole(about 1/3 LC50, 12 mg L-1) 12 and 24 h, respectively. The results show that there is a strong correlation between the enzyme activity and resistance, and GST i s likely the main detoxification mechanism responsible for resistance to chlorantraniliprole in P. xylostella L., cytochrome P450 monooxygenase(P450) and carboxy-lesterase(Car E) are involved in to some extent. | HU Zhen-di FENG Xia LIN Qing-sheng CHEN Huan-yu LI Zhen-yu YIN Fei LIANG Pei GAO Xi-wu | 2014 | Journal of Integrative Agriculture2014，13，11： | 12 |
| 20 | Evaluation of a New Real-time PCR Assay for Detection of Mycoplasma Pneumoniae in Clinical Specimens显示文摘Objective To establish and evaluate a real-time PCR assay to detect Mycoplasma pneumoniae (M.pneumoniae) in clinical specimens.Methods By analysing the whole p1 gene sequence of 60 M.pneumoniae clinical isolates in Beijing of China,an optimized real-time PCR assay (MpP1) using p1 gene conserved region was designed.The specificity and sensitivity of this assay were evaluated and compared with other two reported assays (RepMp1 and Mp181) using 40 positive and 100 negative clinical specimens.Results The detection limit of the new assay was 8.1 fg (about 1~3CFU) M.pneumoniae DNA.The sensitivity of MpP1,RepMp1,and Mp181 assays appeared to be 100%,100%,and 85%,respectively.Conclusion MpP1 assay is suitable for the detection of M.pneumoniae in Chinese clinical specimens. | ZHAO Fei CAO Bin HE Li Hua YIN Yu Dong TAO Xiao Xia SONG Shu Fan MENG Fan Liang ZHANG Jian Zhong | 2012 | Biomedical and Environmental Sciences2012，25，1： | 11 |
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