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Synthesis and characterization of magnetic polymer microspheres with a core-shell structure

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Particuology 2007年第Z1期 180-185页

作者： ming lu, shu bai, kun yang, yan sun Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Non-porous magnetic polymer microspheres with a core-shell structure were prepared by a novel micro-suspension polymerization technique. A stable iron oxide ferrofluid was used to supply the magnetic core, and the polymeric shell was made of glycidyl methacrylate (GMA monomer) and ethylene dimethacrylate (cross-linker). In the preparation, polyvinyl alcohol was used as the stabilizer, and a lauryl alcohol mixture as the dispersant. The influence of various conditions such as aqueous phase volume, GMA and initiator amounts, reaction time and stirring speed on the character of the microspheres was investigated. The magnetic microspheres were then characterized briefly. The results indicate that the microspheres with active epoxy groups had a narrow size distribution range from 1 to 10 m with a volume-weighted mean diameter of 4.5 m. The saturation magnetization reached 19.9 emu/g with little coercivity and remanence.

关键词： Ferrofluid Micro-suspension polymerization Magnetic microspheres Particle size Magnetization

Contribution of Baroreflex Afferent Pathway to NPY-Mediated Regulation of Blood Pressure in Rats

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Neuroscience Bulletin 2020年第4期36卷 396-406页

作者： yang Liu shu-yang Zhao yan Feng Jie sun Xiao-Long lu Qiu-Xin yan Ying Li Zhuo Liu lu-Qi Wang Xun sun Shijun Li Guo-Fen Qiao bai-yan Li Department of Pharmacology State-Province Key Laboratories of Biomedicine-Pharmaceutics of ChinaKey Laboratory of Cardiovascular Medicine ResearchMinistry of EducationCollege of PharmacyHarbin Medical UniversityHarbin 150081China Department of Clinical Laboratory The First Affiliated Hospital of Dalian Medical UniversityDalian 116011China Department of Pharmacology College of PharmacyDalian Medical UniversityDalian 116044China Riley Heart Center Wells Center for Pediatric ResearchIndiana University School of MedicineIndianapolisIN 46202USA

Neuropeptide Y (NPY), a metabolism-related cardiovascular factor, plays a crucial role in blood pressure(BP) regulation via peripheral and central pathways. The expression of NPY receptors (Y1R/Y2R) specific to baroreflex afferents impacts on the sexually dimorphic neural control of circulation. This study was designed to investigate the expression profiles of NPY receptors in the nodose ganglion (NG) and nucleus tractus solitary (NTS) under hypertensive conditions. To this end, rats with hypertension induced by NG-nitro-L-arginine methylester (L-NAME) or high fructose drinking (HFD), and spontaneously hypertensive rats (SHRs) were used to explore the effects/mechanisms of NPY on BP using functional, molecular, and electrophysiological approaches. The data showed that BP was elevated along with baroreceptor sensitivity dysfunction in model rats;Y1R was up-or down-regulated in the NG or NTS of male and female HFD/L-NAME groups,while Y2R was only down-regulated in the HFD groups as well as in the NG of the male L-NAME group. In SHRs,Y1R and Y2R were both down-regulated in the NTS, and not in the NG. In addition to NPY-mediated energy homeostasis, leptin-melanocortin activation may be essential for metabolic disturbance-related hypertension. We found that leptin and a-melanocyte stimulating hormone (aMSH) receptors were aberrantly down-regulated in HFD rats. In addition, a-MSH concentrations were reduced and NPY concentrations were elevated in the serum and NTS at 60 and 90 min after acute leptin infusion. Electrophysiological recordings showed that the decay time-constant and area under the curve of excitatory post-synaptic currents were decreased by Y1R activation in A-types, whereas, both were increased by Y2R activation in Ah-or C-types. These results demonstrate that sex-and afferent-specific NPY receptor expression in the baroreflex afferent pathway is likely to be a novel target for the clinical management of metabolism-related and essential hypertension.

关键词： Neuropeptide Y Hypertension Nucleus of the solitary tract Excitatory post-synaptic current Baroreflex

Cross-neutralizing Anti-hemagglutinin Antibodies Isolated from Patients Infected with Avian Influenza A(H5N1) Virus

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Biomedical and Environmental Sciences 2020年第2期33卷 103-113页

作者： sun Ying CAO yang LI Zi bai Tian ZHANG Hong HU Shi Xiong LI Fang Cai ZHAO Xiang CHEN Yong kun lu Jian LIU Li Qi WANG Da yan shu Yue Long ZHOU Jian Fang National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionKey Laboratory for Medical VirologyNational Health and Family Planning CommissionBeijing 102206China Center of Growth Metabolism and AgingKey Laboratory of Bio-Resource and Eco-EnvironmentMinistry of EducationCollege of Life SciencesSichuan UniversityChengdu 610064SichuanChina Hunan Provincial Disease Control and Prevention Changsha 410000HunanChina School of Public Health(Shenzhen) Sun Yatsen UniversityShenzhen 510275GuangdongChina

Objective To recover broad-neutralizing monoclonal antibodies(Bn Abs)from avian influenza A(H5N1)virus infection cases and investigate their genetic and functional *** We screened the Abs repertoires of expanded B cells circulating in the peripheral blood of H5N1 *** genetic basis,biological functions,and epitopes of the obtained Bn Abs were assessed and *** Two Bn Abs,2-12 D5,and 3-37 G7.1,were respectively obtained from two human H5N1 cases on days 12 and 21 after disease *** Abs demonstrated cross-neutralizing and Ab-dependent cellular cytotoxicity(ADCC)*** derived from distinct Ab lineages,i.e.,V^H1-69-D2-15-JH^4(2-12D5)and V^H1-2-D3-9-JH^5(3-32 G7.1),the Bn Abs were directed toward CR6261-like epitopes in the HA stem,and HA2 I45 in the hydrophobic pocket was the critical residue for their *** motifs for binding with the HA stem,namely,IFY in VH1-69-encoded Abs and LXYFXW in D3-9-encoded Abs,were also observed in 2-12D5 and 3-32 G7.1,*** Cross-reactive B cells of different germline origins could be activated and re-circulated by avian influenza *** HA stem epitopes targeted by the Bn Abs,and the two Ab-encoding genes usage implied the VH1-69 and D3-9 are the ideal candidates triggered by influenza virus for vaccine development.

关键词： V^H1-69 D3-9 Avian influenza A(H5N1)virus Cross-neutralizing Antibody

Updated diagnosis, treatment and prevention of COVID-19 in children: experts' consensus statement (condensed version of the second edition)

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World Journal of Pediatrics 2020年第3期16卷 232-239页

作者： kun-Ling Shen Yong-Hong yang Rong-Meng Jiang Tian-You Wang Dong-Chi Zhao Yi Jiang Xiao-Xia lu Run-ming Jin Yue-Jie Zheng Bao-Ping Xu Zheng-De Xie Zhi-sheng Liu Xing-wang Li Li-Kai Lin Yun-Xiao Shang Sai-Nan shu yan bai Min lu Gen lu Ji-Kui Deng Wan-Jun luo Li-Juan Xiong Miao Liu Yu-Xia Cui Le-Ping Ye Jia-Fu Li Jian-Bo Shao Li-Wei Gao Yong-yan Wang Xue-Feng Wang Global Pediatric Pulmonology Alliance China National Clinical Research Center for Respiratory Diseases Department of Respiratory MedicineBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijingChina Institute of Infectious Disease Beijing Ditan HospitalCapital Medical UniversityBeijingChina Center of Hematologic Oncology National Center for Children's HealthBeijing Children's HospitalCapital Medical UniversityBeijingChina Department of Pediatrics Zhongnan Hospital of Wuhan UniversityWuhanChina Department of Pediatrics Renmin Hospital of Wuhan UniversityWuhanChina Department of Respiratory Medicine Wuhan Children's HospitalTongji Medical College of Huazhong University of Science and TechnologyWuhanChina Department of Pediatrics Union Hospital affiliated to Tongji Medical College of Huazhong University of Science and TechnologyWuhanChina Department of Respiratory Medicine Shenzhen Children's HospitalShenzhenChina China National Clinical Research Center for Respiratory Diseases Beijing Institute of PediatricsBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthResearch Unit of Critical Infection in ChildrenChinese Academy of Medical SciencesBeijing 2019RU016China Department of Neurology Wuhan Children's HospitalTongji Medical College of Huazhong University of Science and TechnologyWuhanChina Institute of Hospital Management Wuhan UniversityZhongnan Hospital of Wuhan UniversityWuhanChina Department of Pediatric Respiratory Shengjing Hospital of China Medical UniversityShenyangChina Department of Pediatrics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Respiratory Medicine Children's Hospital of ShanghaiShanghaiChina Department of Respiratory Medicine Guangzhou Women and Children's Medical CenterGuangzhouChina Department of Infectious Diseases Shenzhen Children's HospitalShenzhenChina Office of Infection Management Wuhan Children's Ho

In the early February,2020,we called up an experts' committee with more than 30 Chinese experts from 11 national medical academic organizations to formulate the first edition of consensus statement on diagnosis,treatment and prevention of coronavirus disease 2019 (COVID-19) in children,which has been published in this *** accumulated experiences in the diagnosis and treatment of COVID-19 in children,we have updated the consensus statement and released the second edition *** current version in English is a condensed version of the second edition of consensus statement on diagnosis,treatment and prevention of COVID-19 in *** the current version,diagnosis and treatement criteria have been optimized,and early identification of severe and critical cases is *** early warning indicators for severe pediatric cases have been summarized which is utmost important for clinical *** version of experts consensus will be valuable for better prevention,diagnosis and treatment of COVID-19 in children worldwide.

关键词： Children COVID-19 Infection SARS-CoV-2 Treatment

RETROSPECTIVE ANALYSIS OF MAGNETIC RESONANCE MYOCARDIAL DELAYED ENHANCEMENT

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Chinese Medical Sciences Journal 2006年第4期21卷 245-251页

作者： Zhu-hua Zhang Qi Miao Song-bai Lin shu-yang Zhang Li-bo Chen Heng Zhang Yi-ning Wang lu Zhou Lin-yan Kong Feng Feng Hui You Hong-yi sun Wen-min Zhao Li-ren Zhang Zheng-yu Jin Department of Radiology Department of Cardiac Surgery Special Medical Care Center Department of Cardiology Department of Nuclear Medicine Peking Union Medical CollegeHospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100730

Objective To explore the imaging and related clinical characteristics of magnetic resonance （MR） delayed enhancement in patients with ischemic or nonischemic heart disease. Methods Thirty-two cases who underwent MR myocardial cine and delayed enhancement imaging from January 2004 to October 2006 were retrospectively analyzed. The cine sequence imaging included the four-chamber view and the left ventricular short axis view. The delayed enhancement imaging was taken 10 minutes after the infusion of gadolinium from the antecubital vein with a segmented inversion-recovery-prepared Tl-weighted fast gradient echo sequence. Patients underwent coronary computed tomography angiography （CTA） two weeks before or after the MR imaging examination. Combined with clinical history, the clinical and MR imaging characteristics of the patients who had delayed enhancement were analyzed. Results MR delayed enhancement could be found in 16 cases. Among them, 12 cases had ischemic heart disease. Their coronary CTA showed one to three vessel diseases. The delayed enhancement was transmural or subendocardium, and the area of delayed enhancement corresponded well with one or more coronary arteries which had severe stenosis or occlusion. Four cases had nonischemic heart diseases One case was dilated cardiomyopathy, with diffuse small midwall spots in delayed enhancemen and only 30% stenosis of the anterior descending coronary artery in coronary CTA. One case was hypertrophic cardiomyopathy, with delayed enhancement of strip- and patch-shaped at midwall of the hypertrophic myocardiurn. One case was restrictive cardiomyopathy, and the delayed enhancement was located in the area of subendocardium of both the right and left ventricles. Coronary CTA of these two cases were normal The other case was a mass of the lateral wall of the left ventricle, and the delayed enhancement with a clumpy shape was located in the lateral wall of the left ventricle. Conclusions MR myocardial delayed enhancement

关键词： cardiac imaging magnetic resonance imaging contrast enhancement

Diagnosis,treatment,and prevention of monkeypox in children:an experts'consensus statement

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World Journal of Pediatrics 2023年第3期19卷 231-242页

作者： Rong-Meng Jiang Yue-Jie Zheng Lei Zhou lu-Zhao Feng Lin Ma Bao-Ping Xu Hong-Mei Xu Wei Liu Zheng-De Xie Ji-Kui Deng Li-Juan Xiong Wan-Jun luo Zhi-Sheng Liu Sai-Nan shu Jian-She Wang Yi Jiang Yun-Xiao Shang Miao Liu Li-Wei Gao Zhuang Wei Guang-Hua Liu Gang Liu Wei Xiang Yu-Xia Cui Gen lu Min lu Xiao-Xia lu Run-ming Jin yan bai Le-Ping Ye Dong-Chi Zhao A-Dong Shen Xiang Ma Qing-Hua lu Feng-Xia Xue Jian-Bo Shao Tian-You Wang Zheng-yan Zhao Xing-Wang Li Yong-Hong yang kun-Ling Shen Diagnosis and Treatment Center of Infectious Diseases Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Department of Respiratory Shenzhen Children’s HospitalShenzhen 518038China Branch for Emerging Infectious Disease Public Health Emergency CenterChinese Center for Disease Control and PreventionBeijing 102206China School of Population Medicine&Public Health Chinese Academy of Medical Science/Peking Union Medical CollegeBeijing 100730China Department of Dermatology Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s Health(Beijing)Beijing 100045China Department of Respiratory Beijing Children’s HospitalCapital Medical UniversityNational Clinical Research Center for Respiratory DiseasesNational Center for Children’s Health(Beijing)Beijing 100045China Department of Infectious Diseases Children’s Hospital of Chongqing Medical UniversityChongqing 400014China Tianjin Children’s Hospital Children’s Hospital of Tianjin UniversityTianjin 300134China Beijing Key Laboratory of Pediatric Respiratory Infection Diseases Key Laboratory of Major Diseases in ChildrenMinistry of EducationNational Clinical Research Center for Respiratory DiseasesResearch Unit of Critical Infection in ChildrenChinese Academy of Medical Sciences2019RU016Laboratory of Infection and VirologyBeijing Pediatric Research InstituteBeijing Children’s HospitalCapital Medical UniversityNational Center for Children’s Health(Beijing)Beijing 100045China Department of Infectious Diseases Shenzhen Children’s HospitalShenzhen 518038China Department of Infectious Diseases Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Ofce of Infection Management Wuhan Children’s HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430016China Department of Neurology Wuhan Children’s HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430016China Department of Pediatrics Tongji

Monkeypox is a zoonotic *** the first human monkeypox case was detected in 1970,it has been prevalent in some countries in central and western *** May 2022,monkeypox cases have been reported in more than 96 non-endemic countries and regions *** of September 14,2022,there have been more than 58,200 human monkeypox cases,and there is community *** cessation of smallpox vaccination in 1980,which had some cross-protection with monkeypox,resulted in a general lack of immunity to monkeypox,which caused global concern and *** of Sep-tember 14,2022,there are four monkeypox cases in China,including three in Taiwan province and one in Hong Kong *** foreign studies have shown that children are vulnerable to monkeypox and are also at high risk for severe disease or *** order to improve pediatricians'understanding of monkeypox and achieve early detection,early diagno-sis,early treatment,and early disposal,we have organized national authoritative experts in pediatric infection,respiratory,dermatology,critical care medicine,infectious diseases,and public health and others to formulate this expert consensus,on the basis of the latest"Clinical management and infection prevention and control for monkeypox"released by The World Health Organization,the"guidelines for diagnosis and treatment of monkeypox(version 2022)"issued by National Health Commission of the People's Republic of China and other relevant *** the development of this consensus,multidisciplinary experts have repeatedly demonstrated the etiology,epidemiology,transmission,clinical manifestations,laboratory examinations,diagnosis,differential diagnosis,treatment,discharge criteria,prevention,disposal process,and key points of prevention and control of suspected and confirmed cases.

关键词： Children Consensus Diagnosis Monkeypox Prevention Treatment

Site testing at Muztagh-ata site Ⅱ:seeing statistics

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Research in Astronomy and Astrophysics 2020年第6期20卷 175-184页

作者： Jing Xu Ali Esamdin Jin-Xin Hao Jin-Min bai Ji yang Xu Zhou Yong-Qiang Yao Jin-Liang Hou Guang-Xin Pu Guo-Jie Feng Chun-Hai bai Peng Wei shu-Guo Ma Abudusaimaitijiang Yisikandee Le-Tian Wang Xuan Zhang Liang ming lu Ma Jin-Zhong Liu Zi-Huang Cao Yong-Heng Zhao lu Feng Jian-Rong Shi Hua-Lin Chen Chong Pei Xiao-Jun Jiang Jian-Feng Wang Jian-Feng Tian yan-Jie Xue Jing-Yao Hu Yun-Ying Jiang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Yun nan Observatories Chin ese Academy of Scie ncesKun ming 650000China Purple Mountain Observatory Chinese Academy of SciencesNanjing 21000&China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210008China

In this article,we present a detailed analysis of the statistical properties of seeing for the Muztaghata site which is a candidate site for hosting the future Chinese Large Optical/infrared Telescope(LOT)*** measurements were obtained with differential image motion monitors(DIMMs)from April2017 to November 2018 at different heights during different *** median seeings at 11 m and6 m are very close but significantly different from that on the *** mainly analyzed the seeing at11 m monthly and hourly,having found that the best season for observing was from late autumn to early winter and seeing tended to improve during the night only in *** analysis of the dependence on temperature inversion,wind speed and direction also was made and the best meteorological conditions for seeing are given.

关键词： site testing seeing

The Melastoma dodecandrum genome and the evolution of Myrtales

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Journal of Genetics and Genomics 2022年第2期49卷 120-131页

作者： yang Hao Yu-Zhen Zhou Bin Chen Gui-Zhen Chen Zhen-Ying Wen Diyang Zhang Wei-Hong sun Ding-kun Liu Jie Huang Jin-Liao Chen Xiao-Qin Zhou Wan-Lin Fan Wen-Chun Zhang Lin luo Wen-Chao Han yan Zheng Long Li Peng-Cheng lu Yue Xing shu-Ya Liu Jia-Ting sun Ying-Hui Cao yan-Ping Zhang Xiao-Ling Shi Sha-Sha Wu Ye Ai Jun-Wen Zhai Si-Ren Lan Zhong-Jian Liu Dong-Hui Peng Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China Innovation and Application Engineering Technology Research Center of Ornamental Plant Germplasm Resources in Fujian Province Fuzhou 350002China

Melastomataceae has abundant morphological diversity with high economic and ornamental merit in Myrtales. The phylogenetic position of Myrtales is still contested. Here, we report the chromosome-level genome assembly of Melastoma dodecandrum in Melastomataceae. The assembled genome size is299.81 Mb with a contig N50 value of 3.00 Mb. Genome evolution analysis indicated that M. dodecandrum,Eucalyptus grandis, and Punica granatum were clustered into a clade of Myrtales and formed a sister group with the ancestor of fabids and malvids. We found that M. dodecandrum experienced four whole-genome polyploidization events: the ancient event was shared with most eudicots, one event was shared with Myrtales, and the other two events were unique to M. dodecandrum. Moreover, we identified MADS-box genes and found that the AP1-like genes expanded, and AP3-like genes might have undergone subfunctionalization. The SUAR63-like genes and AG-like genes showed different expression patterns in stamens, which may be associated with heteranthery. In addition, we found that LAZY1-like genes were involved in the negative regulation of stem branching development, which may be related to its creeping features. Our study sheds new light on the evolution of Melastomataceae and Myrtales, which provides a comprehensive genetic resource for future research.

关键词： Melastoma Genome evolution Flower development Heteranthery Flower color Creeping stem

Diagnosis,treatment and prevention of severe acute respiratory syndrome coronavirus 2 infection in children:experts'consensus statement updatedforthe Omicron variant

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World Journal of Pediatrics 2024年第3期20卷 272-286页

作者： Rong-Meng Jiang Zheng-De Xie Yi Jiang Xiao-Xia lu Run-ming Jin Yue-Jie Zheng Yun-Xiao Shang Bao-Ping Xu Zhi-Sheng Liu Gen lu Ji-Kui Deng Guang-Hua Liu Xiao-Chuan Wang Jian-She Wang lu-Zhao Feng Wei Liu Yi Zheng Sai-Nan shu Min lu Wan-Jun luo Miao Liu Yu-Xia Cui Le-Ping Ye A-Dong Shen Gang Liu Li-Wei Gao Li-Juan Xiong yan bai Li-Kai Lin Zhuang Wei Feng-Xia Xue Tian-You Wang Dong-Chi Zhao Jian-Bo Shao Daniel Kwok-keung Ng Gary Wing-kin Wong Zheng-yan Zhao Xing-Wang Li Yong-Hong yang kun-Ling Shen Diagnosis and Treatment Center of Infectious Diseases Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Beijing Key Laboratory of Pediatric Respiratory Infection Diseases Key Laboratory of Major Diseases in ChildrenMinistry of EducationNational Clinical Research Center for Respiratory DiseasesResearch Unit of Critical Infection in ChildrenChinese Academy of Medical Sciences2019RU016Laboratory of Infection and VirologyBeijing Pediatric Research InstituteBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijing 100045China Department of Pediatrics Renmin Hospital of Wuhan UniversityWuhan 430060China Department of Respiratory Wuhan Children's HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430016China Department of Pediatrics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Respiratory Shenzhen Children's HospitalShenzhen 518038China Department of Pediatric Respiratory Shengjing Hospital Affiliated to China Medical UniversityShenyang 110004China Department of Respiratory Beijing Children's HospitalCapital Medical UniversityNational Clinical Research Center for Respiratory DiseasesNational Center for Children's HealthBeijing 100045China Department of Neurology Wuhan Children's HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430016China Department of Respiratory Guangzhou Women and Children's Medical CenterGuangzhou 510623China Department of Infectious Diseases Shenzhen Children's HospitalShenzhen 518038China Department of Pediatrics Fujian Branch of Shanghai Children's Medical CenterFujian Children's HospitalFuzhou350005China Department of Clinical Immunology and Allergy Children's Hospital of Fudan UniversityNational Center for Children's HealthShanghai 201102China Department of Infectious Diseases Children's Hospital of Fudan UniversityNational Center for Children's Health.Shanghai

It has been more than 3 years since the novel coronavirus(SARS-CoV-2)pandemic raged *** coronavirus disease 2019(COVID-19)has greatly influenced human *** to data from the World Health Organization(WHO),there were ove... 详细信息

关键词： prevention infection statement