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WJG 20^(th) Anniversary Special Issues(1): Hepatocellular carcinoma Risk prediction of hepatitis B virus-related hepatocellular carcinoma in the era of antiviral therapy

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World Journal of Gastroenterology 2013年第39期19卷 6515-6522页

作者： Grace Lai-hung Wong Vincent wai-Sun Wong Institute of Digestive Disease and Department of Medicine and Therapeutics The Chinese University of Hong Kong

Chronic hepatitis B(CHB)-related hepatocellular carcinoma(HCC)is a major health problem in AsianPacific *** therapy reduces,but does not eliminate the risk of *** would be a heavy financial burden in most low and middle economic countries if all CHB patients received antiviral therapy and HCC ***,there is a need for accurate risk prediction to assist prognostication,decisions on the need for antiviral therapy and HCC surveillance.A few wellestablished risk factors for HCC,namely advanced age,male gender,high viral load,cirrhosis etc.,are the core components of three HCC risk scores:CU-HCC,GAGHCC and REACH-B *** 3 scores were confirmed to be accurate in predicting HCC up to 10 years in treatment-na ve *** validity and applicability have recently been demonstrated in a large cohort of entecavir treatment patients.A decrease in risk scores after antiviral therapy translates to a lower risk of *** findings support the application of HCC risk scores in all CHB *** levels of care and different intensities of HCC surveillance should be offered according to the risk profile of *** at risk of HCC should undergo regular HCC surveillance,even when they are receiving antiviral treatment.

关键词： Antiviral therapy Cirrhosis Hepatitis B virus DNA Hepatocellular carcinoma Risk prediction score Transient elastography

An unprecedented outbreak investigation for nosocomial and community-acquired legionellosis in Hong Kong

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Chinese Medical Journal 2012年第23期125卷 4283-4290页

作者： CHENG Vincent Chi-chung WONG Samson Sai-yin CHEN Jonathan Hon-kwan CHAN Jasper Fuk-woo TO Kelvin Kai-wang POON Rosana Wing-shan WONG Sally Cheuk-ying CHAN Kwok-hung TAI Josepha wai-ming HO Pak-leung TSANG Thomas Ho-fai YUEN Kwok-yung Department of Microbiology Queen Mary Hospital Hong Kong China Infection Control Team Queen Mary Hospital Hong Kong China Centre for Health Protection Department of Health Hong Kong China

Background The environmental sources associated with community-acquired or nosocomial legionellosis were not always detectable in the mainland of China and Hong Kong, China. The objective of this study was to illustrate the control measures implemented for nosocomial and community outbreaks of legionellosis, and to understand the environmental distribution of legionella in the water system in Hong Kong, China. Methods We investigated the environmental sources of two cases of legionellosis acquired in the hospital and the community by extensive outbreak investigation and sampling of the potable water system using culture and genetic testing at the respective premises. Results The diagnosis of nosocomial legionellosis was suspected in a patient presenting with nosocomial pneumonia not responsive to multiple beta-lactam antibiotics with subsequent confirmation by Legionella pneumophila serogroup 1 antigenuria. High counts of Legionella pneumophila were detected in the potable water supply of the 70-year-old hospital building. Another patient on continuous ambulatory peritoneal dialysis presenting with acute community-acquired pneumonia and severe diarrhoea was positive for Legionella pneumophila serogroup 1 by polymerase chain reaction （PCR） testing on both sputum and nasopharyngeal aspirate despite negative antigenuria. Paradoxically the source of the second case was traced to the water system of a newly commissioned office building complex. No further cases were detected after shock hyperchlorination with or without superheating of the water systems. Subsequent legionella counts were drastically reduced. Point-of-care infection control by off-boiled or sterile water for mouth care and installation of water filter for showers in the hospital wards for immunocompromised patients was instituted. Territory wide investigation of the community potable water supply showed that 22.1% of the household water supply was positive at a mean legionella count of 108.56 CFU/ml （rang

关键词： outbreak nosocomial legionellosis community-acquired legionellosis

Identification of Ca2+ signaling components in neural stem/progenitor cells during differentiation into neurons and glia in intact and dissociated zebrafish neurospheres

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Science China(Life Sciences) 2018年第11期61卷 1352-1368页

作者： Man Kit Tse Ting Shing hung Ching Man Chan Tiffany Wong Mike Dorothea Catherine Leclerc Marc Moreau Andrew L.Miller Sarah E.Webb Division of Life Science & State Key Laboratory of Molecular Neuroscience HKUSTClear Water BayHongKongChina Centre de Biologie du Developpement(CBD) Centre de Biologie Integrative(CBI)Universite de ToulouseCNRSUPSToulouse F-31062France

The development of the CNS in vertebrate embryos involves the generation of different sub-types of neurons and glia in a complex but highly-ordered spatio-temporal manner. Zebrafish are commonly used for exploring the development, plasticity and regeneration of the CNS, and the recent development of reliable protocols for isolating and culturing neural stem/progenitor cells(NSCs/NPCs) from the brain of adult fish now enables the exploration of mechanisms underlying the induction/specification/differentiation of these cells. Here, we refined a protocol to generate proliferating and differentiating neurospheres from the entire brain of adult zebrafish. We demonstrated via RT-qPCR that some isoforms of ip3 r, ryr and stim are upregulated/downregulated significantly in differentiating neurospheres, and via immunolabelling that 1,4,5-inositol trisphosphate receptor(ip3 R) type-1 and ryanodine receptor(RyR) type-2 are differentially expressed in cells with neuron-or radial glial-like properties. Furthermore, ATP but not caffeine(ip3 R and RyR agonists, respectively), induced the generation of Ca^(2+) transients in cells exhibiting neuron-or glial-like morphology. These results indicate the differential expression of components of the Ca^(2+) -signaling toolkit in proliferating and differentiating cells. Thus, given the complexity of the intact vertebrate brain, neurospheres might be a useful system for exploring neurodegenerative disease diagnosis protocols and drug development using Ca^(2+) signaling as a read-out.

关键词： Ca^2+ signaling neurospheres zebrafish neural stem/progenitor cells differentiation ip3receptors ryanodine receptors STIM and Orai

Colour Reflectance Investigation of Decolourized Sulfur Dyed Cotton Knitted Fabric via Ozone Plasma Treatment

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World Journal of Engineering and Technology 2020年第3期8卷 429-442页

作者： Yaohui Liu Yanming Wang Hiu-Yan Cheung Chi-wai Kan Hong Chua Department of Construction Technology and Engineering The Technological and Higher Educational Institute of Hong Kong Tsing Yi New Territories Hong Kong China Institute of Textiles and Clothing The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China

Ozone plasma treatment is accessible to be applied on shading adjustment and colour fading because of the capacity of ozone production. It is a green process that treats dyed cotton fabric under dry condition so as to avoid chemical pollutants. This study means to explore colour reflectance of decolourized sulfur dyed cotton texture using ozone plasma treatment. Sulfur dyed cotton textures with various colour depths (0.5%, 1.5%, 2.5%) were set up to be treated different plasma parameters, including ozone air concentrations (10%, 30%, 50%, 70%), water contents in terms of weight percentage (35%, 45%) of fabric and ozone air plasma treatment periods (10 mins, 20 mins, 30 mins). The colour fading result is assessed by the colour reflectance in percentage (R%) utilizing spectrophotometer under CIE standard illuminant D65. The valid colour fading based on high percentage of reflectance was demonstrated from plasma treatment under higher ozone air concentration (50% and 70% ozone in air) and longer time length of plasma treatment (20 mins and 30 mins). The level of water content contained in the cotton fabrics is appeared to have noteworthy relationship with the degree of decolourization.

关键词： Plasma Treatment Cotton Fabric Colour Reflectance Sulfur Dye Decolourization

Ultrafast time-resolved probe of elementary steps in photo-luminescence of organic metal complexes and binding interaction with nucleic acids

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Ultrafast time-resolved probe of elementary steps in photo-l...

支气管上皮细胞和嗜酸性粒细胞联合培养对IL-8释放的影响

第一届全国光功能材料青年学者研讨会2018

作者： Chensheng Ma wai-Ming Kwok Chi-Ming Che College of Chemistry and Environmental Engineering Shenzhen University Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung Hom Department of Chemistry The University of Hong Kong

Photo-luminescent organic metal complexes have found diverse applications in areas such as sensor materials,OLEDs, and photo-catalysis, etc. To understand at molecular level the excited state dynamics of metal complex and how this may vary with the metal center, the ligand structure, and environmental factor is essential for rational design and better performance of metal complexes in the various applications. Herein we demonstrate utilization of a range of complementary ultrafast spectroscopy to investigate in real time the excited state dynamics for series of recently synthesized mono-, bi, and multi-nuclear transition metal complexes both in the solid state and in solution with solvent of varied properties. By direct probe of the excited state spectra and temporal evolution of the spectra, we are able to unravel the elementary steps underlying the entire dynamics of the excited state deactivation;the results unveil a number of remarkable features crucial for elucidating several key processes of photo-excited metal complexes. This involves the rate and timescale of the intersystem crossing,1-3 the molecular mechanism to delayed fluorescence for the multiple emission phenomenon,2,3 and the rapid events dictated by phase condition and solvent property for luminescence and photochemical outcomes of a prototype bi-nuclear gold complex.4 We also present result of time-resolved study on a tridentated Pt（II）complex exhibiting luminescence with energy and intensity highly sensitive to conformation of nucleic acids arising due to sequence specific intercalation binding interaction between the complex and the nucleic acids.5 Our work enriches knowledge on photo-physics and photochemistry of metal complexes, providing significant insights into the structure-property relationship for this important class of molecules.

关键词： luminescent metal complex,ultrafast spectroscopy excited state dynamics,dual emission DNA intercalation

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军医进修学院学报 2006年第2期27卷 103-104页

作者：王成彬黄振国叶伟基鲍依希田亚平林伟基解放军总医院生化科北京100853 香港中文大学化学病理学系

目的:探讨支气管上皮细胞和嗜酸性粒细胞联合培养对细胞趋化因子白细胞介素(IL)-8分泌的影响。方法:人支气管上皮细胞系BEAS-2B细胞与人外周血嗜酸性粒细胞联合培养;应用流式细胞微珠实验(CBA)方法定量细胞培养上清液中细胞趋化因子IL-... 详细信息

目的:探讨支气管上皮细胞和嗜酸性粒细胞联合培养对细胞趋化因子白细胞介素(IL)-8分泌的影响。方法:人支气管上皮细胞系BEAS-2B细胞与人外周血嗜酸性粒细胞联合培养;应用流式细胞微珠实验(CBA)方法定量细胞培养上清液中细胞趋化因子IL-8的浓度;用RT-PCR方法分析经与嗜酸性粒细胞联合培养后BEAS-2B细胞中IL-8的基因表达。结果:与嗜酸性粒细胞联合培养后,BEAS-2B细胞中IL-8基因表达显著上调,细胞联合培养上清液中IL-8释放显著增加。结论:嗜酸性粒细胞与支气上皮细胞联合培养可活化支气管上皮细胞中IL-8基因表达和促进其蛋白质分泌。

关键词：支气管上皮细胞嗜酸性粒细胞增多白细胞介素8

Molecular basis of von Hippel-Lindau syndrome in Chinese patients

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Chinese Medical Journal 2011年第2期124卷 237-241页

作者： SIU wai-kwan MA Ronald Ching-wan LAM Ching-wan MAK Chloe Miu YUEN Yuet-ping LO Fai-man Ivan CHAN Kin-wan LAM Siu-fung LING Siu-cheung TONG Sui-fan SO Wing-yee CHOW Chun-chung TANG Mary Hoi-yin TAM wing-hung CHAN Albert Yan-wo Department of Pathology Princess Margaret Hospital Hong Kong China Department of Medicine & Therapeutics The Chinese University of Hong Kong Prince of Wales Hospital Hong Kong China Department of Pathology Li Ka Shing Faculty of Medicine The University of Hong Kong Queen Mary Hospital Hong Kong China Clinical Genetic Service Department of Health Hong Kong China Department of Medicine and Geriatrics Princess Margaret Hospital Hong Kong China Department of Paediatrics and Adolescent Medicine Princess Margaret Hospital Hong Kong China Department of Obstetrics & Gynaecology Tsan Yuk Hospital Hong Kong China Department of Obstetrics & Gynaecology The Chinese University of Hong Kong Prince of Wales Hospital Hong Kong China

Background Von Hippel-Lindau （VHL） syndrome is an autosomal dominant familial cancer syndrome predisposing the affected individuals to multiple tumours in various *** genetic basis of VHL in Southern Chinese is largely *** this study,we characterized the mutation spectrum of VHL in nine unrelated Southern Chinese *** Nine probands with clinical features of VHL,two symptomatic and eight asymptomatic family members were included in this *** diagnosis was performed twice for one *** probands had only isolated bilateral *** VHL gene was screened for mutations by polymerase chain reaction,direct sequencing and multiplex ligation-dependent probe amplification （MLPA）.Results The nine probands and the two symptomatic family members carried heterozygous germline *** different VHL mutations were identified in the nine *** splicing mutation,NM_000551.2：c.463＋1G〉T,was *** other seven VHL mutations,c.233A〉G [***78Ser],c.239G〉T [***80lle],c.319C〉G [***107Gly],c.481C〉T [***161X],c.482G〉A [***161GIn],c.499C〉T [***167Trp] and an exon 2 deletion,had been previously *** asymptomatic family members were positive for the mutation and the other five tested *** prenatal diagnosis,the fetuses were positive for the *** Genetic analysis could accurately confirm VHL syndrome in patients with isolated tumours such as sporadic phaeochromocytoma or epididymal papillary *** detection in asymptomatic family members allows regular tumour surveillance and early intervention to improve their ***-based diagnosis can have an important impact on clinical management for VHL families.

关键词： von Hippel-Lindau syndrome VHL gene Chinese VHL mutations

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毛泽东、毛泽东思想与共产主义知识分子

Acute myocardial infarction caused by myocardial bridging alone confirmed by using intravascular ultrasonography

毛泽东思想 2011年第6期

作者： hung-Yok ip

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Chronic Diseases and Translational Medicine 2017年第4期3卷 260-262页

作者： Na-Qiong Wu Mario Evora U Po Lam Man Fai ip Jian-Jun Li Division of Dyslipidemia State Key Laboratory of Cardiovascular Disease Fu Wai Hospital National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100037 China Department of Cardiology Government Hospital Macao China

Dear Editor: Although the underlying pathogenesis of acute myocardial infarction (AMI) caused by myocardial bridging (MB) is not fully understood, high shear stress that induces endothelial dysfunction or damage that leads to thrombus formation has been mainly consid-ered. We report a case of AMI due to MB confirmed in a series of angiographic examinations, including intra-vascular ultrasonography (IVUS). Our data may pro-vide credible evidence that supports this hypothesis.

关键词： Acute myocardial infarction Myocardial bridging Coronary angiography Intravascular ultrasonography