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Hemin restores the impaired endothelium-dependent vasodilatation in diabetic db/db mice and the possible mechanisms involved

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中国病理生理杂志 2010年第A10期26卷 2055-2055页

作者： wong WT wong sl LAU CW Institute of Vascular Medicine and School of Biomedical Sciences Chinese University of Hong Kong

关键词： impaired endothelium monoxide protective oxygenase exert potent hemin inducer benefit

ROS does not contribute to acute development of nitroglycerine tolerance in rat aortas

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ROS does not contribute to acute development of nitroglyceri...

Hemin restores the impaired endothelium -dependent vasodilatation in diabetic db/db mice and the possible mechanisms involved

中国病理生理学会第九届全国代表大会及学术会议

作者： DOING JH wong sl TIAN XY LEE HK LEE WY LAU CW Institute of Vascular Medicine and School of Biomedical Sciences Chinese University of Hong Kong

＜正＞The development of nitroglycerine tolerance limits its clinical efficacy of nitric oxide（NO）*** cellular mechanisms have been proposed to explain this phenomenon,one of which is an exaggerated production of reactive oxygen specious（ROS）.The present study examined whether ROS contribute to the occurrence of nitroglycerine tolerance which is induced acutely in aortas isolated from male Sprague-Dawley *** aortas were exposed to 30μmol/L nitroglycerine（with and without pre-incubation of ROS inhibitors） for 90 min and washed out 4 times during the following 60 min before phenylephrine was added to induce a steady contraction. Subsequently,nitroglycerine was added cumulatively（3 nmol/L-50μmol/L）to evoke ***-induced relaxations were severely impaired after 90-min pre-exposure to *** with apocynin,tempol and tiron plus DETCA

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Hemin restores the impaired endothelium -dependent vasodilat...

Crosstalk between degradation and bioenergetics: how autophagy and endolysosomal processes regulate energy production

中国病理生理学会第九届全国代表大会及学术会议

作者： LIU J,wong WT,TIAN XY,LIU LM,wong sl,LAU CW,YU J,YAO X,HUANG Y Institute of Vascular Medicine and School of Biomedical Sciences,Chinese University of Hong Kong,China

Heme oxygenase(HO)is the enzyme that catalyzes the degradation of heme and leads to the formation of carbon monoxide,free iron and *** evidence suggests that HO-1,an inducible isoform of HO,can exert vaso-protective ***, such vascular benefit in diabetic vasculopathy remains largely *** present study investigates the impact of HO-1 induction on endothelial dysfunction in type 2 diabetic db/db *** db/db and non-diabetic db/mmice were treated with hemin

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Neural Regeneration Research 2025年第3期20卷 671-681页

作者： Angelid Pabon Jagannatham Naidu Bhupana Ching-On wong Department of Biological Sciences Rutgers UniversityNewarkNJUSA

Cells undergo metabolic reprogramming to adapt to changes in nutrient availability, cellular activity, and transitions in cell states. The balance between glycolysis and mitochondrial respiration is crucial for energy production, and metabolic reprogramming stipulates a shift in such balance to optimize both bioenergetic efficiency and anabolic requirements. Failure in switching bioenergetic dependence can lead to maladaptation and pathogenesis. While cellular degradation is known to recycle precursor molecules for anabolism, its potential role in regulating energy production remains less explored. The bioenergetic switch between glycolysis and mitochondrial respiration involves transcription factors and organelle homeostasis, which are both regulated by the cellular degradation pathways. A growing body of studies has demonstrated that both stem cells and differentiated cells exhibit bioenergetic switch upon perturbations of autophagic activity or endolysosomal processes. Here, we highlighted the current understanding of the interplay between degradation processes, specifically autophagy and endolysosomes, transcription factors, endolysosomal signaling, and mitochondrial homeostasis in shaping cellular bioenergetics. This review aims to summarize the relationship between degradation processes and bioenergetics, providing a foundation for future research to unveil deeper mechanistic insights into bioenergetic regulation.

关键词： autophagy bioenergetics endolysosome energy production glycolysis metabolic reprogramming mitochondria

Advances in Graphene‑Based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： Bin Xie Yuanhui Guo Yun Chen Hao Zhang Jiawei Xiao Maoxiang Hou Huilong Liu Li Ma Xin Chen Chingping wong State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flexible and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is expected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows excellent prospects for application in TENG owing to its unique structure and excellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator Precision processing Graphene electrode Self-powered sensor

Nanoimprint lithography-assisted block copolymer self-assembly for hyperfine fabrication of magnetic patterns based on L10-FePt nanoparticles

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Science China Chemistry 2025年

作者： Jie Zhang Yi Chen Guijun Li Zelin Sun Zhengong Meng Wai-Yeung wong Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University The Hong Kong Polytechnic University Shenzhen Research Institute Division of Integrative Systems and Design and Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology School of Flexible Electronics (Future Technology) and Institute of Advanced Materials (IAM) Nanjing Tech University

L10-FePt-type bit-patterned media has provided a promising alternative for ultrahigh-density magnetic recording systems in the current digital era, but rapid fabrication of magnetic patterns with hyperfine bit islands is still challenging, especially with the target for miniaturization and scalable production simultaneously. Herein, Fe,Pt-containing block copolymers were utilized as single-source precursors for solution-processable patterning and subsequent generation of the demanding magnetic FePt dots by in situ pyrolysis. High-throughput nanoimprint lithography was initially employed to fabricate the predefined bit cells precisely,and then the intrinsic self-assembly of phase-separated block copolymers further drove the formation of accurate bit *** from the synergistic effect of top-down lithographic approach and bottom-up self-assembly, the customizable patterns could be achieved for large-scale mass production in targeted areas, but high-density isolated dots could also be accurately aligned along the patterned features after subsequent self-assembly. This reliable strategy would provide a good avenue to precisely construct ultrahigh-density magnetic data storage devices.

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Hepatocellular carcinoma surveillance and quantile regression for determinants of underutilisation in at-risk Australian patients

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World Journal of Gastrointestinal Oncology 2021年第12期13卷 2149-2160页

作者： Elizabeth sl Low Ross Apostolov Darren wong Sandra Lin Numan Kutaiba Josephine A Grace Marie Sinclair Department of Gastroenterology and Liver Transplant Unit Austin HealthHeidelberg 3084VictoriaAustralia Department of Medicine University of MelbourneMelbourne 3000VictoriaAustralia Department of Radiology Monash HealthClayton 3168VictoriaAustralia Department of Radiology Austin HealthHeidelberg 3084VictoriaAustralia

BACKGROUND While clinical guidelines recommend hepatocellular carcinoma(HCC)surveillance for at-risk individuals,reported surveillance rates in the United States and Europe remain disappointingly *** To quantify HCC surveillance in an Australian cohort,and assess for factors associated with surveillance *** All patients undergoing HCC surveillance liver ultrasounds between January 1,2018 to June 30,2018 at a tertiary hospital in Melbourne,Australia,were followed until July 31,2020,or when surveillance was no longer *** primary outcome was the percentage of time up-to-date with HCC surveillance(PTUDS).Quantile regression was performed to determine the impact of factors associated with HCC surveillance *** Among 775 at-risk patients followed up for a median of 27.5 months,the median PTUDS was 84.2%(IQR:66.3%-96.3%).85.0%of patients were followed up by specialist *** those receiving specialist care,quantile regression demonstrated differential associations at various quantile levels of PTUDS for several *** age at the 25th quantile(estimate 0.002 per percent,P=0.03),and cirrhotic status at the 75th quantile(estimate 0.021,P=0.017),were significantly associated with greater percentage of time *** ethnicity(estimate-0.089,P=0.048)and a culturally and linguistically diverse(CALD)background(estimate-0.063,P=0.01)were significantly associated with lower PTUDS at the 50th quantile,and again for CALD at the 75th quantile(estimate-0.026,P=0.045).CONCLUSION While median PTUDS in this Australian cohort study was 84.2%,awareness of the impact of specific factors across PTUDS quantiles can aid targeted interventions towards improved HCC surveillance.

关键词： Liver cirrhosis Hepatitis,viral,human Carcinoma,hepatocellular Liver neoplasms Early detection of cancer Population surveillance

Deep residual learning for denoising Monte Carlo renderings

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Computational Visual Media 2019年第3期5卷 239-255页

作者： Kin-Ming wong Tien-Tsin wong Artixels Hong Kong S.A.R.China Department of Computer Science and Engineering the Chinese University of Hong KongHong Kong S.A.R.China

Learning-based techniques have recently been shown to be effective for denoising Monte Carlo rendering methods. However, there remains a quality gap to state-of-the-art handcrafted denoisers. In this paper, we propose a deep residual learning based method that outperforms both state-of-the-art handcrafted denoisers and learning-based *** the indirect nature of existing learning-based methods(which e.g., estimate the parameters and kernel weights of an explicit feature based filter), we directly map the noisy input pixels to the smoothed output. Using this direct mapping formulation, we demonstrate that even a simple-and-standard ResNet and three common auxiliary features(depth, normal,and albedo) are sufficient to achieve high-quality denoising. This minimal requirement on auxiliary data simplifies both training and integration of our method into most production rendering pipelines. We have evaluated our method on unseen images created by a different renderer. Consistently superior quality denoising is obtained in all cases.

关键词： Monte Carlo rendering denoising deep learning deep residual learning filter-free denoising

Answering Reachability Queries on Incrementally Updated Graphs by Hierarchical Labeling Schema

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Journal of Computer Science & Technology 2016年第2期31卷 381-399页

作者： Tak-Lam wong Department of Mathematics and Information Technology The Hong Kong Institute of Education Hong Kong China

We proposed a novel solution schema called the Hierarchical Labeling Schema （HLS） to answer reachability queries in directed graphs. Different from many existing approaches that focus on static directed acyclic graphs （DAGs）, our schema focuses on directed cyclic graphs （DCGs） where vertices or arcs could be added to a graph incrementally. Unlike many of the traditional approaches, HLS does not require the graph to be acyclic in constructing its index. Therefore, it could, in fact, be applied to both DAGs and DCGs. When vertices or arcs are added to a graph, the HLS is capable of updating the index incrementally instead of re-computing the index from the scratch each time, making it more efficient than many other approaches in the practice. The basic idea of HLS is to create a tree for each vertex in a graph and link the trees together so that whenever two vertices are given, we can immediately know whether there is a path between them by referring to the appropriate trees. We conducted extensive experiments on both real-world datasets and synthesized datasets. We compared the performance of HLS, in terms of index construction time, query processing time and space consumption, with two state-of-the-art methodologies, the path-tree method and the 3-hop method. We also conducted simulations to model the situation when a graph is updated incrementally. The performance comparison of different algorithms against HLS on static graphs has also been studied. Our results show that HLS is highly competitive in the practice and is particularly useful in the cases where the graphs are updated frequently.

关键词： graph indexing reachability query Hierarchical Labeling Schema (HLS) incremental update directed cyclic graph