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Novel predictors of permanent pacemaker implantation following transcatheter aortic valve replacement

World Journal of Cardiology 2023年第11期15卷 582-598页

作者： Somto Nwaedozie Haibin Zhang Javad Najjar Mojarrab Param Sharma paul yeung Peter Umukoro Deepa Soodi Rachel Gabor Kelley Anderson Romel Garcia-Montilla Department of Cardiovascular Disease Marshfield ClinicMarshfieldWI 54449United States Hospitalist Medicine Marshfield ClinicMarshfieldWI 54449United States Department of Nephrology Henry Ford Health SystemDetroitMI 48202United States Department of Hospital Medicine Marshfield ClinicMarshfieldWI 54449United States Department of Nephrology Hendricks Regional HealthDanvilleIN 46122United States Clinical Research Center Marshfield ClinicMarshfieldWI 54449United States Department of Trauma Surgery and Surgical Critical Care Marshfield ClinicMarshfieldWI 54449United States

BACKGROUND Conduction and rhythm abnormalities requiring permanent pacemakers(PPM)are short-term complications following transcatheter aortic valve replacement(TAVR),and their clinical outcomes remain *** novel predictors of post-TAVR PPM,like QRS duration,QTc prolongation,and supraventricular arrhythmias,have been poorly *** To evaluate the effects of baseline nonspecific interventricular conduction delay and supraventricular arrhythmia on post-TAVR PPM requirement and determine the impact of PPM implantation on clinical *** RESULTS Out of the 357 patients that met inclusion criteria,the mean age was 80 years,188(52.7%)were male,and 57(16%)had a PPM *** demographics,valve type,and cardiovascular risk factors were similar except for type II diabetes mellitus(DM),which was more prevalent in the PPM cohort(59.6%vs 40.7%;P=0.009).The PPM cohort had a significantly higher rate of pre-procedure right bundle branch block,prolonged QRS>120 ms,prolonged QTc>470 ms,and supraventricular *** was a consistently significant increase in the odds ratio(OR)of PPM implantation for every 20 ms increase in the QRS duration above 100 ms:QRS 101-120[OR:2.44;confidence intervals(CI):1.14-5.25;P=0.022],QRS 121-140(OR:3.25;CI:1.32-7.98;P=0.010),QRS 141-160(OR:6.98;CI:3.10-15.61;P120(aOR:2.18;CI:1.02-4.66;P=0.045)and marginally significant for supraventricular arrhythmias(aOR:1.82;CI:0.97-3.42;P=0.062).The PPM cohort had a higher adjusted OR of heart failure(HF)hospitalization(aOR:2.2;CI:1.1-4.3;P=0.022)and nonfatal myocardial infarction(MI)(aOR:3.9;CI:1.1-14;P=0.031)without any difference in mortality(aOR:1.1;CI:0.5-2.7;P=0.796)at one *** Pre-TAVR type II DM and QRS duration>120,regardless of the presence of bundle branch blocks,are predictors of post-TAVR *** 1-year post-

关键词： Transcatheter aortic valve replacement Balloon-expandable valve Self-expandable valve Myocardial infarction Left bundle-branch block Nonspecific inter-ventricular defect Coronary artery bypass graft Coronary artery disease

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Uptake of B,Co and Ni by Plants from Oil Contaminated Soil Capped with Peat

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Journal of Northeast Agricultural University(English Edition) 2020年第2期27卷 37-41页

作者： Sun Tao Liu Xiao-jie paul yeung Xu Jing-gang College of Resources and Environmental Sciences Northeast Agricultural UniversityHarbin 150030China Heilongjiang Provincial Ecological Meteorological Center Harbin 150030China National Soybean Engineering Technology Research Center Northeast Agricultural UniversityHarbin 150030China Canagra Development Ltd. EdmontonAlberta T6R 2C6Canada

Plant uptake of contaminants provides vital information for the reclamation of large area of contaminated soils.A field experiment was conducted using four plant species growing in four kinds of oil contaminated soils to estimate the uptake of organic and inorganic contaminants by plants from the oil contaminated *** experiment showed that the concentrations of some selected elements,such as B,Co and Ni in plants growing in the oil contaminated soils were significantly higher than those in plants growing in the uncontaminated control *** accumulation of metals in plants increased with plant biomass;however,the removal of metals by plants from the oil contaminated soils was not practical.

关键词： oil contaminated soil metal concentration removal metal uptake and accumulation

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Delivery of theophylline as dry powder for inhalation

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Asian Journal of Pharmaceutical Sciences 2015年第6期10卷 520-527页

作者： Bing Zhu Mehra Haghi Anphy Nguyen Mary Goud Stewart yeung paul MYoung Daniela Traini Respiratory Technology TheWoolcock Institute for Medical Research and Discipline of PharmacologySydney Medical SchoolUniversity of SydneyNSW 2006Australia Faculty of Pharmacy University of Technology SydneyNSW 2007Australia Avans University of Applied Science BredaThe Netherlands

Theophylline(TP)is a very well established orally or intravenously delivered antiasthma drug with many beneficial *** study aims to improve asthma treatment by creating a dry powder inhalable(DPI)formulation of TP to be delivered directly to the lung,avoiding the side effects associated with conventional oral *** DPI TP formulation was investigated for its physico-chemical characteristics using scanning electron microscopy,laser diffraction,thermal analysis and dynamic vapour ***,aerosol performance was assessed using the Multi Stage Liquid Impinger(MSLI).In addition,a Calu-3 cell transport assay was conducted in vitro using a modified ACI to study the impact of the DPI formulation on lung epithelial *** showed DPI TP to be physico-chemically stable and of an aerodynamic size suitable for lung *** aerosolisation performance analysis showed the TP DPI formulation to have a fine particle fraction of 29.70±2.59%(P<0.05)for the TP formulation containing 1.0%(w/w)sodium stearate,the most efficient for *** the deposition of TP DPI on Calu-3 cells using the modified ACI,results demonstrated that 56.14±7.62%of the total TP deposited(13.07±1.69μg)was transported across the Calu-3 monolayer over 180 min following deposition,while 37.05±12.62%of the deposited TP was retained in the *** could be due to the presence of sodium stearate in the current formulation that increased its lipophilicity.A DPI formulation of TP was developed that was shown to be suitable for inhalation.

关键词： Theophylline Powder formulation Aerosol performance Physiochemical characteristics

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In vitro and in vivo antibacterial performance of Zr&O PIII magnesium alloys with high concentration of oxygen vacancies

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Bioactive Materials 2021年第10期6卷 3049-3061页

作者： Tao Liang Lilan Zeng Yunzhu Shi Haobo Pan paul K.Chu Kelvin W.K.yeung Ying Zhao Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen518055China University of Chinese Academy of Sciences Beijing100049China Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina Department of Orthopaedics and Traumatology The University of Hong KongHong KongChina

The effects of dual Zr and O plasma immersion ion implantation(Zr&O PIII)on antibacterial properties of ZK60 Mg alloys are systematically *** results show that a hydrophobic,smooth,and ZrO_(2)-containing graded film is *** assessment shows that the corrosion rate of the plasma-treated Mg alloy decreases and the decreased degradation rate is attributed to the protection rendered by the surface *** vitro and in vivo antibacterial tests reveal Zr&O PIII ZK60 presents higher antibacterial rate compared to Zr PIII ZK60 and untreated *** hydrophobic and smooth surface suppresses bacterial *** concentration of oxygen vacancies in the surface films are determined by X-ray photoelectron spectroscopy(XPS),UV-vis diffuse reflectance spectra(UV-vis DRS)and electron paramagnetic resonance(EPR)and involved in the production of reactive oxygen species(ROS).The higher level of ROS expression inhibits biofilm formation by down-regulating the expression of icaADBC genes but up-regulating the expression of icaR *** addition,Zr&O PIII improves cell viability and initial cell adhesion confirming good *** Zr&O PIII is a simple and practical means to expedite clinical acceptance of biodegradable magnesium alloys.

关键词： Magnesium alloy Plasma immersion ion implantation Degradation ZrO_(2) Antibacterial property

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Probiotic-based nanoparticles for targeted microbiota modulation and immune restoration in bacterial pneumonia

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National Science Review 2023年第2期10卷 183-198页

作者： Jieni Fu Xiangmei Liu Zhenduo Cui Yufeng Zheng Hui Jiang Yu Zhang Zhaoyang Li Yanqin Liang Shengli Zhu paul K Chu Kelvin Wai Kwok yeung Shuilin Wu School of Materials Science & Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China Tianjin University School of Materials Science & Engineering Peking University School of Health Science & Biomedical Engineering Hebei University of Technology Department of Orthopedics Guangdong Provincial People's HospitalGuangdong Academy of Medical Sciences Department of Physics Department of Materials Science and Engineering and Department of Biomedical Engineering City University of Hong Kong Department of Orthopaedics & Traumatology Li Ka Shing Faculty of Medicine The University of Hong Kong

While conventional bacterial pneumonia mainly centralizes avoidance of bacterial colonization,it remains unclear how to restore the host immunity for hyperactive immunocompetent primary and immunocompromised secondary bacterial ***,probiotic-based nanoparticles of OASCLR were formed by coating chitosan,hyaluronic acid and ononin on living Lactobacillus *** nanoparticles could effectively kill various clinic common pathogens and antibacterial efficiency was> 99.97%.Importantly,OASCLR could modulate lung microbiota,increasing the overall richness and diversity of microbiota by decreasing pathogens and increasing probiotic and commensal ***,OASCLR could target inflammatory macrophages by the interaction of OASCLR with the macrophage binding site of CD 44 and alleviate overactive immune responses for hyperactive immunocompetent ***,OASCLR could break the state of the macrophage’ s poor phagocytic ability by upregulating the expression of the extracellular matrix assembly,immune activation and fibroblast activation in immunocompromised *** macrophage’ s phagocytic ability was increased from 2.61% to 12.3 %.Our work provides a potential strategy for hyperactive immunocompetent primary and immunocompromised secondary bacterial pneumonia.

关键词： probiotic-based nanoparticles immunocompetent primary bacterial pneumonia immunocompromised secondary bacterial pneumonia restoring host immunity

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Perfluorooctane sulfonate(PFOS) and related fluorochemicals in chicken egg in China

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Chinese Science Bulletin 2008年第4期53卷 501-507页

作者： WANG Yuan yeung Leo Wai Yin YAMASHITA Nobuyoshi TANIYASU Sachi SO Man Ka Margaret B. MURPHY LAM paul Kwan Sing Centre for Coastal Pollution and Conservation Department of Biology and Chemistry City University of Hong Kong 83 Tat Chee Avenue Kowloon Tong HKSAR China National Institute of Advanced Industrial Science and Technology (AIST) 16-10nogawa Tsukuba Ibaraki 305-8569 Japan

The ubiquitous occurrence of perfluorinated compounds(PFCs) in environmental samples has drawn much *** human exposure studies found relatively high perfluorooctane sulfonate(PFOS) concentrations in blood samples from several cities in China when compared with other *** objectives of the present study were:(1) to measure PFC concentrations and compositions in chicken egg samples from local markets in China;and(2) to conduct a preliminary human health risk assessment of egg *** pooled egg samples from eight locations were analyzed for 11 *** results showed that close to 100% of the PFOS in the egg was distributed in egg yolk and PFOS was not detected in egg white(<0.08 ng/g wet weight,w/w).Of the perfluoroalkylsulfonates,only PFOS was detected in all egg samples,while of the perfluoroalkylcarboxylates,perfluoroundecanoic acid(PFUnDA) was detected in all samples,followed by perfluorooctanoate(PFOA)(75% occurrence) and perfluorodecanoic acid(PFDA)(50% occurrence).PFOS concentrations in egg ranged from 45.0 to 86.9 ng/g w/*** results suggested that current concentrations of PFOS in domestic chicken eggs are unlikely to cause immediate harm to Chinese populations.

关键词：中国鸡蛋人体健康风险评估污染物含氟化合物全氟辛烷磺酸

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The modulation of stem cell behaviors by functionalized nanoceramic coatings on Ti-based implants

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Bioactive Materials 2016年第1期1卷 65-76页

作者： Xiangmei Liu Man Li Yizhou Zhu K.W.K.yeung paul K.Chu Shuilin Wu Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsHubei Key Laboratory of Polymer MaterialsFaculty of Materials Science&EngineeringHubei UniversityWuhan 430062China Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen Hospital1 Haiyuan 1st RoadFutian DistrictShenzhenChina Division of Spine Surgery Department of Orthopaedics&TraumatologyLi Ka Shing Faculty of MedicineThe University of Hong KongPokfulamHong KongChina Department of Physics&Materials Science City University of Hong KongTat Chee AvenueKowloonHong KongChina

Nanoceramic coating on the surface of Ti-based metallic implants is a clinical potential option in orthopedic *** cells have been found to have osteogenic *** is necessary to study the influences of functionalized nanoceramic coatings on the differentiation and proliferation of stem cells in vitro or in *** this paper,we summarized the recent advance on the modulation of stem cells behaviors through controlling the properties of nanoceramic coatings,including surface chemistry,surface roughness and *** addition,mechanotransduction pathways have also been discussed to reveal the interaction mechanisms between the stem cells and ceramic coatings on Ti-based *** the final part,the osteoinduction and osteoconduction of ceramic coating have been also presented when it was used as carrier of BMPs in new bone formation.

关键词： Nanoceramic coating Ti Stem cell Modulation Implants

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Engineered polycaprolactone–magnesium hybrid biodegradable porous scaffold for bone tissue engineering

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Progress in Natural Science:Materials International 2014年第5期24卷 561-567页

作者： Hoi Man Wong paul K.Chu Frankie K.L.Leung Kenneth M.C.Cheung Keith D.K.Luk Kelvin W.K.yeung Department of Orthopaedics and Traumatology The University of Hong Kong Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen Hospital Department of Physics and Materials Science City University of Hong Kong Peking University Shenzhen Institution

In this paper, we describe the fabrication of a new biodegradable porous scaffold composed of polycaprolactone(PCL) and magnesium(Mg)micro-particles. The compressive modulus of PCL porous scaffold was increased to at least 150% by incorporating 29% Mg particles with the porosity of 74% using Micro-CT analysis. Surprisingly, the compressive modulus of this scaffold was further increased to at least 236% when the silane-coupled Mg particles were added. In terms of cell viability, the scaffold modified with Mg particles significantly convinced the attachment and growth of osteoblasts as compared with the pure PCL scaffold. In addition, the hybrid scaffold was able to attract the formation of apatite layer over its surface after 7 days of immersion in normal culture medium, whereas it was not observed on the pure PCL scaffold. This in vitro result indicated the enhanced bioactivity of the modified scaffold. Moreover, enhanced bone forming ability was also observed in the rat model after 3 months of implantation. Though bony in-growth was found in all the implanted scaffolds. High volume of new bone formation could be found in the Mg/PCL hybrid scaffolds when compared to the pure PCL scaffold. Both pure PCL and Mg/PCL hybrid scaffolds were degraded after 3 months. However, no tissue inflammation was observed. In conclusion, these promising results suggested that the incorporation of Mg micro-particles into PCL porous scaffold could significantly enhance its mechanical and biological properties. This modified porous bio-scaffold may potentially apply in the surgical management of large bone defect fixation.

关键词： Magnesium Polycaprolactone Biodegradability Biocompatibility Mechanical properties

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Stepwise 3D-spatio-temporal magnesium cationic niche: Nanocomposite scaffold mediated microenvironment for modulating intramembranous ossification

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Bioactive Materials 2021年第2期6卷 503-519页

作者： Jie Shen Bo Chen Xinyun Zhai Wei Qiao Shuilin Wu Xuanyong Liu Ying Zhao Changshun Ruan Haobo Pan paul K.Chu Kenneth M.C.Cheung Kelvin W.K.yeung Department of Orthopaedics and Traumatology The University of Hong KongHong KongChina Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma Department of Orthopaedics and Traumatologythe University of Hong Kong-Shenzhen HospitalShenzhenChina Shanghai Institute of Traumatology and Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint DiseasesRuijin HospitalSchool of MedicineShanghai Jiaotong UniversityShanghaiChina School of Materials Science and Engineering Nankai UniversityTianjinChina School of Materials Science&Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjinChina Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhanChina State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina Cixi Center of Biomaterials Surface Engineering Shanghai Institute of CeramicsChinese Academy of SciencesNingboChina Center for Human Tissues and Organs Degeneration Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenChina Department of Physics Department of Materials Science&Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong KongChina

The fate of cells and subsequent bone regeneration is highly correlated with temporospatial coordination of chemical,biological,or physical cues within a local tissue *** understanding of how mammalian cells react to local tissue microenvironment is paramount important when designing next generation of biomaterials for tissue *** study aims to investigate that the regulation of magnesium cationic(Mg^2+)tissue microenvironment is able to convince early-stage bone regeneration and its mechanism undergoes intramembranous *** was discovered that moderate Mg^2+content niche(~4.11 mM)led to superior bone regeneration,while Mg^2+-free and strong Mg^2+content(~16.44 mM)discouraged cell adhesion,proliferation and osteogenic differentiation,thereby bone formation was rarely *** magnesium ions diffused into free Mg zone from concentrated zone in late time point,new bone formation on free Mg zone became significant through intramembranous *** study successfully demonstrates that magnesium cationic microenvironment serves as an effective biochemical cue and is able to modulate the process of bony tissue *** knowledge of how a Mg^2+cationic microenvironment intertwines with cells and subsequent bone formation gained from this study may provide a new insight to develop the next generation of tissuerepairing biomaterials.

关键词： Nanocomposite Magnesium ion Microenvironment 3D scaffold Bone tissue regeneration

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Regulation of extracellular bioactive cations in bone tissue microenvironment induces favorable osteoimmune conditions to accelerate in situ bone regeneration

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Bioactive Materials 2021年第8期6卷 2315-2330页

作者： Zhengjie Lin Danni Shen Weixiao Zhou Yufeng Zheng Tiantian Kong Xuanyong Liu Shuilin Wu paul K.Chu Ying Zhao Jun Wu Kenneth M.C.Cheung Kelvin W.K.yeung College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen518060China Department of Orthopaedics and Traumatology The University of Hong KongHong KongChina Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing100871China Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen Hospital1 Haiyuan 1st RoadFutian DistrictShenzhenChina Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging Department of Biomedical EngineeringSchool of MedicineShenzhen UniversityShenzhen518060China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China School of Materials Science&Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin300072China Department of Physics Department of Materials Science and EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina Centre for Human Tissues and Organs Degeneration Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055China State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China

The design of orthopedic biomaterials has gradually shifted from“immune-friendly”to“immunomodulatory,”in which the biomaterials are able to modulate the inflammatory response via macrophage polarization in a local immune microenvironment that favors osteogenesis and implant-to-bone *** the well-known effects of bioactive metallic ions on osteogenesis,how extracellular metallic ions manipulate immune cells in bone tissue microenvironments toward osteogenesis and subsequent bone formation has rarely been ***,we investigate the osteoimmunomodulatory effect of an extracellular bioactive cation(Mg^(2+))in the bone tissue microenvironment using custom-made poly lactic-co-glycolic acid(PLGA)/MgO-alendronate microspheres that endow controllable release of magnesium *** results suggest that the Mg^(2+)-controlled tissue microenvironment can effectively induce macrophage polarization from the M0 to M2 phenotype via the enhancement of anti-inflammatory(IL-10)and pro-osteogenic(BMP-2 and TGF-β1)cytokines *** also generates a favorable osteoimmune microenvironment that facilitates the proliferation and osteogenic differentiation of bone marrow mesenchymal stem *** in vivo results further verify that a large amount of bony tissue,with comparable bone mineral density and mechanical properties,has been generated at an early post-surgical stage in rat intramedullary bone defect *** study demonstrates that the concept of in situ immunomodulated osteogenesis can be realized in a controlled magnesium tissue microenvironment.

关键词： Bone regeneration Osteoimmunomodulatory property Osteoimmune environment Macrophage polarization Magnesium ions

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