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Yuen BPN, Wong KS, So YM, Kwok WH, Cheung HW, Wan TSM, Ho ENM, Wong WT. Gene Doping Control Analysis of Human Erythropoietin Transgene in Equine Plasma by PCR-Liquid Chromatography High-Resolution Tandem Mass Spectrometry. Anal Chem 2024; 96:5307-5314. [PMID: 38504497 DOI: 10.1021/acs.analchem.4c00247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Gene doping involves the misuse of genetic materials to alter an athlete's performance, which is banned at all times in both human and equine sports. Quantitative polymerase chain reaction (qPCR) assays have been used to control the misuse of transgenes in equine sports. Our laboratory recently developed and implemented duplex as well as multiplex qPCR assays for transgenes detection. To further advance gene doping control, we have developed for the first time a sensitive and definitive PCR-liquid chromatography high-resolution tandem mass spectrometry (PCR-LC-HRMS/MS) method for transgene detection with an estimated limit of detection of below 100 copies/mL for the human erythropoietin (hEPO) transgene in equine plasma. The method involved magnetic-glass-particle-based extraction of DNA from equine plasma prior to PCR amplification with 2'-deoxyuridine 5'-triphosphate (dUTP) followed by treatments with uracil DNA glycosylase and hot piperidine for selective cleavage to give small oligonucleotide fragments. The resulting DNA fragments were then analyzed by LC-HRMS/MS. The applicability of this method has been demonstrated by the successful detection of hEPO transgene in a blood sample collected from a gelding (castrated male horse) that had been administered the transgene. This novel approach not only serves as a complementary method for transgene detection but also paves the way for developing a generic PCR-LC-HRMS/MS method for the detection of multiple transgenes.
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Affiliation(s)
- Bruce Pui-Nam Yuen
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin N.T., Hong Kong, China
| | - Kin-Sing Wong
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin N.T., Hong Kong, China
| | - Yat-Ming So
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin N.T., Hong Kong, China
| | - Wai Him Kwok
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin N.T., Hong Kong, China
| | - Hiu Wing Cheung
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin N.T., Hong Kong, China
| | - Terence See Ming Wan
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin N.T., Hong Kong, China
| | - Emmie Ngai-Man Ho
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin N.T., Hong Kong, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
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Ho HSM, Ho ENM, Wong WT. Endogenous nature of estra-4,9-diene-3,17-dione in entire male horses. Drug Test Anal 2024. [PMID: 38532598 DOI: 10.1002/dta.3685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/29/2024] [Accepted: 03/07/2024] [Indexed: 03/28/2024]
Abstract
Estra-4,9-diene-3,17-dione (dienedione) is an anabolic androgenic steroid (AAS) sold as a bodybuilding supplement. It is prohibited in both human and equine sports. With no report of 4,9-diene configuration in endogenous steroids, dienedione has long been considered a synthetic AAS. Nevertheless, the reoccurring detection of dienedione in colt (entire male horse) urine samples lead to the investigation of its possible endogenous nature in horses. This paper describes (i) the detection of naturally occurring dienedione in colts, (ii) the conjugation study of dienedione and (iii) the population study of free and glucuronide-conjugated dienedione in colt urine. Qualitative and quantitative analyses of dienedione content in colt urine were performed, employing liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Qualitative analyses showed that dienedione was endogenous in colt urine and mainly in the form of glucuronide conjugates. Glucuronidation of dienedione was believed to happen at 3-enol leading to dienedione-3-glucuronide. Upon the population study of free and glucuronide-conjugated dienedione in colt urine samples (n = 175), the mean ± SD was determined to be 2.5 ± 3.5 ng/ml. The population data fitted a normal distribution after a fifth root transformation with the exclusion of one outlier by Grubb's test. A possible in-house threshold was proposed at 30 ng/ml of free and glucuronide-conjugated dienedione in colt urine associated with a risk factor of 1 in 14,269 (with a degree of freedom of 173). This is the first report of endogenous dienedione in entire male horses and the approach for controlling its potential misuse by using a threshold is also presented.
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Affiliation(s)
- Helen S M Ho
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China
| | - Emmie N M Ho
- Racing Laboratory, The Hong Kong Jockey Club, Hong Kong, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China
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Zhang Q, Liu Y, He C, Zhu R, Li M, Lam HM, Wong WT. Nutritional Assessment of Plant-Based Meat Products Available on Hong Kong Market: A Cross-Sectional Survey. Nutrients 2023; 15:3684. [PMID: 37686716 PMCID: PMC10489762 DOI: 10.3390/nu15173684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/17/2023] [Accepted: 08/21/2023] [Indexed: 09/10/2023] Open
Abstract
BACKGROUND Plant-based meat (PBM) takes up ever-increasing market shares and draws great attention from both customers and retailers these days. However, little is known about the nutritional quality of PBM products. OBJECTIVE This study intended to profile and evaluate the overview nutrition of PBM with equivalent meat products on the Hong Kong market. METHODS We conducted a cross-sectional survey of 274 PBM and 151 meat products from 27 different brands on the Hong Kong market in October 2022. The nutritional differences between PBM and meat products were assessed using analysis of covariance (ANCOVA) and two independent sample t-test. The nutritional quality of PBMs was evaluated according to nutrient reference value, front-of-package (FoP) criteria and nutritional score. RESULTS PBM had relatively lower energy density, total fat, saturated fat, protein, and salt compared to meat. According to the FoP criteria, 91.36%, 17.88%, and 99.34% of PBMs were labeled as medium to high in fat, salt, and sugar, respectively. Through ingredient analysis of 81 PBM products, soy and canola were the main source of protein and fat. CONCLUSIONS PBM products have a roughly better nutrient quality compared to muscle-based meat, though there is still potential for further refinement in terms of production, consumption, and regulation.
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Affiliation(s)
- Qile Zhang
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China; (Q.Z.); (C.H.); (R.Z.)
| | - Yilin Liu
- The Jockey Club School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China;
| | - Chufeng He
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China; (Q.Z.); (C.H.); (R.Z.)
| | - Ruiwen Zhu
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China; (Q.Z.); (C.H.); (R.Z.)
| | - Minghui Li
- School of Pharmacy, University College London, London WC1N 1AX, UK;
| | - Hon-Ming Lam
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China; (Q.Z.); (C.H.); (R.Z.)
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, China
| | - Wing-Tak Wong
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China; (Q.Z.); (C.H.); (R.Z.)
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, China
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Lai WF, Reddy OS, Law L, Wu H, Wong WT. A self-indicating and antibacterial gelatine-chitosan blended hydrogel enabling real-time quality control and sustained bioactive agent delivery. RSC Adv 2023; 13:11865-11873. [PMID: 37077998 PMCID: PMC10107026 DOI: 10.1039/d2ra06802h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 03/12/2023] [Indexed: 04/21/2023] Open
Abstract
Hydrogels are one type of materials that are widely exploited for bioactive agent delivery, partly owing to their high biocompatibility and low toxicity. When hydrogels are used as carriers, their performance in agent loading and sustained agent release are predominately determined by the gel structure, which can be largely affected by variations during gel preparation. Till now, effective and easy methods to enable monitoring of such variations in real time have been lacking, making quality control of the generated gel-based carrier technically challenging. To address this technical gap, in this study we take advantage of the clusteroluminogenic properties of gelatine and chitosan to generate a crosslinked blended hydrogel which not only shows intrinsic antibacterial properties and high tunability in delivery performance but also shows a self-indicating capacity to enable quality control during hydrogel preparation. Upon fitting the curves of agent release into different kinetic models, the release profiles of the agent-loaded gels have been found to follow the Higuchi model well, with the non-Fickian mechanism being the major mechanism of the release process. Along with their high efficiency in agent loading, our gels warrant further exploitation for use in bioactive agent delivery and related biomedical applications.
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Affiliation(s)
- Wing-Fu Lai
- Department of Urology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College Zhejiang 310012 China
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University Hong Kong Special Administrative Region China
| | | | - Lucy Law
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University Hong Kong Special Administrative Region China
| | - Haicui Wu
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University Hong Kong Special Administrative Region China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University Hong Kong Special Administrative Region China
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Lai WF, Reddy OS, Zhang D, Wu H, Wong WT. Cross-linked chitosan/lysozyme hydrogels with inherent antibacterial activity and tuneable drug release properties for cutaneous drug administration. Sci Technol Adv Mater 2023; 24:2167466. [PMID: 36846525 PMCID: PMC9946310 DOI: 10.1080/14686996.2023.2167466] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/13/2022] [Accepted: 01/04/2023] [Indexed: 06/18/2023]
Abstract
Gels with high drug release sustainability and intrinsic antibacterial properties are of high practical potential for cutaneous drug administration, particularly for wound care and skin disease treatment. This study reports the generation and characterization of gels formed by 1,5-pentanedial-mediated crosslinking between chitosan and lysozyme for cutaneous drug delivery. Structures of the gels are characterized by using scanning electron microscopy, X-ray diffractometry and Fourier-transform infrared spectroscopy. An increase in the mass percentage of lysozyme leads to an increase in the swelling ratio and erosion susceptibility of the resulting gels. The drug delivery performance of the gels can be changed simply by manipulating the chitosan/lysozyme mass-to-mass ratio, with an increase in the mass percentage of lysozyme leading to a decline in the encapsulation efficiency and drug release sustainability of the gels. Not only do all gels tested in this study show negligible toxicity in NIH/3T3 fibroblasts, they also demonstrate intrinsic antibacterial effects against both Gram-negative and Gram-positive bacteria, with the magnitude of the effect being positively related to the mass percentage of lysozyme. All these warrant the gels to be further developed as intrinsically antibacterial carriers for cutaneous drug administration.
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Affiliation(s)
- Wing-Fu Lai
- Department of Urology, Zhejiang Provincial People’s Hospital, Affiliated People’s Hospital, Hangzhou Medical College, Zhejiang, China
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong KongSpecial Administrative Region, China
| | - Obireddy Sreekanth Reddy
- Department of Urology, Zhejiang Provincial People’s Hospital, Affiliated People’s Hospital, Hangzhou Medical College, Zhejiang, China
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong KongSpecial Administrative Region, China
- Department of Chemistry, Sri Krishnadevaraya University, Anantapur, India
| | - Dahong Zhang
- Department of Urology, Zhejiang Provincial People’s Hospital, Affiliated People’s Hospital, Hangzhou Medical College, Zhejiang, China
| | - Haicui Wu
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong KongSpecial Administrative Region, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong KongSpecial Administrative Region, China
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So TY, Yu SCH, Wong WT, Wong JKT, Lee H, Wang YX. Chest computed tomography analysis of lung sparing morphology: differentiation of COVID-19 pneumonia from influenza pneumonia and bacterial pneumonia using the arched bridge and vacuole signs. Hong Kong Med J 2023; 29:39-48. [PMID: 36810239 DOI: 10.12809/hkmj219291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
INTRODUCTION This study evaluated the arched bridge and vacuole signs, which constitute morphological patterns of lung sparing in coronavirus disease 2019 (COVID-19), then examined whether these signs could be used to differentiate COVID-19 pneumonia from influenza pneumonia or bacterial pneumonia. METHODS In total, 187 patients were included: 66 patients with COVID-19 pneumonia, 50 patients with influenza pneumonia and positive computed tomography findings, and 71 patients with bacterial pneumonia and positive computed tomography findings. Images were independently reviewed by two radiologists. The incidences of the arched bridge sign and/or vacuole sign were compared among the COVID-19 pneumonia, influenza pneumonia, and bacterial pneumonia groups. RESULTS The arched bridge sign was much more common among patients with COVID-19 pneumonia (42/66, 63.6%) than among patients with influenza pneumonia (4/50, 8.0%; P<0.001) or bacterial pneumonia (4/71, 5.6%; P<0.001). The vacuole sign was also much more common among patients with COVID-19 pneumonia (14/66, 21.2%) than among patients with influenza pneumonia (1/50, 2.0%; P=0.005) or bacterial pneumonia (1/71, 1.4%; P<0.001). The signs occurred together in 11 (16.7%) patients with COVID-19 pneumonia, but they did not occur together in patients with influenza pneumonia or bacterial pneumonia. The arched bridge and vacuole signs predicted COVID-19 pneumonia with respective specificities of 93.4% and 98.4%. CONCLUSION The arched bridge and vacuole signs are much more common in patients with COVID-19 pneumonia and can help differentiate COVID-19 pneumonia from influenza and bacterial pneumonia.
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Affiliation(s)
- T Y So
- Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - S C H Yu
- Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - W T Wong
- Department of Anaesthesia and Intensive Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - J K T Wong
- Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - H Lee
- Department of Diagnostic Radiology, Princess Margaret Hospital, Hong Kong
| | - Y X Wang
- Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
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Lai WF, Zhang D, Wong WT. Design of erythrocyte-derived carriers for bioimaging applications. Trends Biotechnol 2023; 41:228-241. [PMID: 36031485 DOI: 10.1016/j.tibtech.2022.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 07/01/2022] [Accepted: 07/25/2022] [Indexed: 01/24/2023]
Abstract
Erythrocytes are physiological entities that have been exploited in both preclinical and clinical trials for the delivery of exogenous agents. Over the years, diverse erythrocyte-derived carriers (ECs) have been developed with related patents granted for industrial and commercial purposes. However, most ECs have only been exploited for drug delivery. Serious discussions regarding their applications in imaging are scarce. This article reviews the role of ECs in enhancing imaging efficiency and subsequently delineates strategies for engineering and optimising their preclinical and clinical performance. With a snapshot of the latest developments and use of ECs in imaging, directions to streamline the clinical translation of related technologies can be attained for future research.
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Affiliation(s)
- Wing-Fu Lai
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China; Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou Medical College, Zhejiang 310012, China.
| | - Dahong Zhang
- Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou Medical College, Zhejiang 310012, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
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Chou OHI, Liu X, Zhou J, Jing F, Li L, Lee S, Wong WT, Zhang Q, Chang C, Liu T, Tse G, Cheung BMY. Lower risk of gout in sodium glucose cotransporter 2 (SGLT2) inhibitors versus dipeptidyl peptidase-4 (DPP4) inhibitors in type-2 diabetes patients: a propensity score-matched study. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
The effects of sodium-glucose cotransporter 2 inhibitors (SGLT2I) versus dipeptidyl peptidase-4 inhibitors (DPP4I) on the risk of new gout diagnosis have not been explored. This study aims to compare the effects of SGLT2I against DPP4I on gout risks in a Chinese population.
Methods
This was a retrospective population-based cohort study of patients with type-2 diabetes mellitus treated with SGLT2I or DPP4I between January 1st, 2015 and December 31st, 2020 in Hong Kong. The study outcomes are new-onset gout and all-cause mortality. Propensity score matching (1:1 ratio) between SGLT2I and DPP4I was performed. Univariable and multivariable Cox regression analysis models were conducted. Competing risks models and multiple approaches based on the propensity score were applied.
Patients
This study included 60996 patients (median age: 62.3 years old, 54.96% males; SGLTI group: n=21690; DPP4I group: n=39306).
Results
In the matched cohort, 1096 developed gout (IR: 2.52%) and 2195 died (IR: 5.05%). Univariable Cox regression showed that SGLT2I use was associated with lower risks of new diagnosis of gout (hazard ratio [HR]: 0.34; 95% confidence interval [CI]: 0.30–0.39; P-value<0.0001) and all-cause mortality (HR: 0.35; 95% CI: 0.32–0.39; P-value<0.0001) compared to DPP4I. The associated remained for both new diagnosis of gout (HR: 0.46; 95% CI: 0.37–0.57; P-value<0.0001) and all-cause mortality (HR: 0.38; 95% CI: 0.33–0.44; P-value<0.0001) after adjusting for significant demographics, past comorbidities, and non-SGLT2I/DPP4I medications. The risks of gout were lowered in each types of SGLT2I. The results were consistent on competing risk and other propensity score approaches analyses.
Conclusions
SGLT2I use was associated with lower risks of new gout diagnosis compared to DPP4I use.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- O H I Chou
- The University of Hong Kong, Division of Clinical Pharmacology, Department of Medicine, School of Clinical Medicine , Hong Kong , Hong Kong
| | - X Liu
- Kaili University, School of Educational Science , Kaili , China
| | - J Zhou
- University of Oxford, Nuffield Department of Medicine , Oxford , United Kingdom
| | - F Jing
- Guangdong Second Provincial General Hospital, Institute for Artificial Intelligence , Guangzhou , China
| | - L Li
- King's College London, Department of Biostatistics & Health Informatics, Institute of Psychiatry, Psychology & Neuroscience , London , United Kingdom
| | - S Lee
- Cardiovascular Analytics Group , Hong Kong , Hong Kong
| | - W T Wong
- The Chinese University of Hong Kong, School of Life Sciences , Hong Kong , Hong Kong
| | - Q Zhang
- City University of Hong Kong, School of Data Science , Hong Kong , Hong Kong
| | - C Chang
- Queen Mary Hospital, Department of Medicine , Hong Kong , Hong Kong
| | - T Liu
- 2nd Hospital of Tianjin Medical University, Department of Cardiology , Tianjin , China
| | - G Tse
- Kent and Medway Medical School , Canterbury , United Kingdom
| | - B M Y Cheung
- The University of Hong Kong, Division of Clinical Pharmacology, Department of Medicine, School of Clinical Medicine , Hong Kong , Hong Kong
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Chou OHI, Chang C, Zhou J, Chan J, Leung KSK, Lee TTL, Wong WT, Liu T, Zhang Q, Lee S, Wai AKC, Tse G. Predictive value of neutrophil-to-lymphocyte ratio for atrial fibrillation and stroke in type 2 diabetes mellitus: a population-based cohort study. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Neutrophil-to-lymphocyte ratio (NLR) is a routinely available biomarker that reflects systemic inflammation. The study evaluated the predictive value of NLR for ischemic stroke and atrial fibrillation (AF) in patients with type 2 diabetes mellitus.
Methods
This was a population-based cohort study of patients with type 2 diabetes mellitus and complete blood count tests at baseline between January 1st, 2009 to December 31st, 2009 at government-funded hospitals/clinics in Hong Kong. Follow-up was until December 31st, 2019 or death.
Results
A total of 85351 patients (age=67.6±13.2 years old, male=48.8%, follow-up=3101±1441 days) were included. Univariable Cox regression found that increased NLR at quartiles 2, 3 and 4 was significantly associated with higher risks of new onset ischemic stroke (HR: 1.28 [1.20–1.37], P<0.001, HR: 1.41 [1.32–1.51], P<0.001 and HR: 1.38 [1.29–1.47], P<0.001) and AF (hazard ratio [HR]: 1.09 [1.02–1.17], P<0.015; HR: 1.28 [1.20–1.37], P<0.001; HR: 1.39 [1.31–1.49], P<0.001) compared to quartile 1. On multivariable analysis, NLR remained a significant predictor of ischemic stroke risk for quartiles 2 and 3 (quartile 2: HR: 1.14 [1.05, 1.22], p=0.001; quartile 3: HR: 1.14 [1.06, 1.23], p<0.001) but not quartile 4 (HR: 1.08 [0.994, 1.17], p=0.070). By contrast, NLR was not predictive of AF after adjusting for confounders (quartile 2: HR: 0.966 [0.874, 1.07], p=0.499; quartile 3: HR: 0.978 [0.884, 1.08], p=0.661; quartile 4: HR: 1.05 [0.935, 1.16], p=0.462).
Conclusion
NLR is a significant predictor of new onset ischaemic stroke but not AF after adjusting for significant confounders.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- O H I Chou
- The University of Hong Kong, Division of Clinical Pharmacology, Department of Medicine, School of Clinical Medicine , Hong Kong , Hong Kong
| | - C Chang
- Queen Mary Hospital, Department of Medicine , Hong Kong , Hong Kong
| | - J Zhou
- University of Oxford, Nuffield Department of Medicine , Oxford , United Kingdom
| | - J Chan
- Cardiovascular Analytics Group , Hong Kong , Hong Kong
| | - K S K Leung
- Cardiovascular Analytics Group , Hong Kong , Hong Kong
| | - T T L Lee
- The University of Hong Kong, Emergency Medicine Unit, Li Ka Shing Faculty of Medicine , Hong Kong , Hong Kong
| | - W T Wong
- The Chinese University of Hong Kong, School of Life Sciences , Hong Kong , Hong Kong
| | - T Liu
- 2nd Hospital of Tianjin Medical University, Department of Cardiology , Tianjin , China
| | - Q Zhang
- City University of Hong Kong, School of Data Science , Hong Kong , Hong Kong
| | - S Lee
- Cardiovascular Analytics Group , Hong Kong , Hong Kong
| | - A K C Wai
- The University of Hong Kong, Emergency Medicine Unit, Li Ka Shing Faculty of Medicine , Hong Kong , Hong Kong
| | - G Tse
- Kent and Medway Medical School , Canterbury , United Kingdom
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Li S, Lui KH, Lau WS, Chen J, Lo WS, Li X, Gu YJ, Lin LT, Wong WT. MSOT-Guided Nanotheranostics for Synergistic Mild Photothermal Therapy and Chemotherapy to Boost Necroptosis/Apoptosis. ACS Appl Mater Interfaces 2022; 14:33712-33725. [PMID: 35822699 DOI: 10.1021/acsami.2c07592] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The development of nanotheranostics for precision imaging-guided regulated cell death-mediated synergistic tumor therapy is still challenging. Herein, a novel multifunctional nanotheranostic agent, iRGD-coated maleimide-poly(ethylene glycol)-poly(lactic acid/glycolic acid)-encapsulated hydrophobic gold nanocages (AuNCs) and hydrophilic epigallocatechin gallate (EGCG) (PAuE) is developed for multispectral optoacoustic tomography (MSOT)-guided photothermal therapy (PTT) and chemotherapy. The portions of necroptotic and apoptotic tumor cells were 52.9 and 5.4%, respectively, at 6 h post-incubation after the AuNC-induced mild PTT treatment, whereas they became 14.0 and 46.1% after 24 h, suggesting that the switch of the cell death pathway is a time-dependent process. Mild PTT facilitated the release of EGCG which induces the downregulation of hypoxia-inducible factor-1 (HIF-1α) expression to enhance apoptosis at a later stage, realizing a remarkable tumor growth inhibition in vivo. Moreover, RNA sequence analyses provided insights into the significant changes in genes related to the cross-talk between necroptosis and apoptosis pathways via PAuE upon laser irradiation. In addition, the biodistribution and metabolic pathways of PAuE have been successfully revealed by 3D MSOT. Taken together, this strategy of first combination of EGCG and AuNC-based photothermal agent via triggering necroptosis/apoptosis to downregulate HIF-1α expression in a tumor environment provides a new insight into anti-cancer therapy.
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Affiliation(s)
- Shiying Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Kwok-Ho Lui
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
| | - Wing-Sum Lau
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
| | - Juyu Chen
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
| | - Wai-Sum Lo
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
| | - Xin Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
| | - Yan-Juan Gu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
| | - Liang-Ting Lin
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong 000000, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
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Lai WF, Obireddy SR, Zhang H, Zhang D, Wong WT. Advances in analysis of pharmaceuticals by using graphene-based sensors. ChemMedChem 2022; 17:e202200111. [PMID: 35618680 DOI: 10.1002/cmdc.202200111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/23/2022] [Indexed: 11/10/2022]
Abstract
Safe and effective use of drugs relies on proper pharmaceutical analysis. Graphene has been extensively used to construct sensors for this purpose. Over the years, a large variety of pharmaceutical sensors have been developed from graphene or its derivatives. This articles reviews the current status of sensor development from graphene and its derivatives, and discusses the use of graphene-based sensors in pharmaceutical analysis. It is hoped that this article cannot only offer a snapshot of recent advances in the fabrication and use of graphene-based sensors, but can also provide insights into future engineering and optimization of the sensors for effective pharmaceutical analysis.
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Affiliation(s)
- Wing-Fu Lai
- The Chinese University of Hong Kong, School of Life and Health Sciences, 518172, Shenzhen, CHINA
| | - Sreekanth Reddy Obireddy
- Sri Krishnadevaraya University, Chemistry, TIRUPATI NATIONAL HIGHWAY, ITUKALAPALLI, 515004, India, 515003, ANANTHAPURAMU, INDIA
| | - Haotian Zhang
- The Chinese University of Hong Kong, School of Life and Health Sciences, CHINA
| | | | - Wing-Tak Wong
- The Hong Kong Polytechnic University, Applied Biology and Chemical Technology, CHINA
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12
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Lai WF, Wong WT. Edible Clusteroluminogenic Films Obtained from Starch of Different Botanical Origins for Food Packaging and Quality Management of Frozen Foods. Membranes (Basel) 2022; 12:membranes12040437. [PMID: 35448407 PMCID: PMC9029101 DOI: 10.3390/membranes12040437] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/06/2022] [Accepted: 04/08/2022] [Indexed: 02/04/2023]
Abstract
Starch is a naturally occurring material showing high potential for use in food packaging because of its low cost, natural abundance and high biodegradability. Over the years, different starch-based packaging films have been developed, but the impact of botanical sources on film performance has rarely been exploited. Efforts devoted to exploiting the role played by the clusteroluminescence of starch in food packaging are also lacking. This study fills these gaps by comparing the properties of edible starch films generated from different botanical sources (including water chestnuts, maize and potatoes) in food packaging. Such films are produced by solution casting. They are highly homogeneous, with a thickness of 55–65 μm. Variations in the botanical sources of starch have no significant impact on the color parameters (including L*, a* and b*) and morphological features of the films but affect the water vapor permeability, maximum tensile strength and elongation at break. Starch films from water chestnut show the highest percentage of transmittance, whereas those from potatoes are the opaquest. No observable change in the intensity of clusteroluminescence occurs when a packaging bag generated from starch is used to package fresh or frozen chicken breast meat; however, a remarkable decline in the intensity of luminescence is noted when the frozen meat is thawed inside the bag. Our results reveal the impact of starch sources on the performance of starch films in food packaging and demonstrate the possibility of using the clusteroluminescence of starch as an indicator to reveal the state of packaged frozen food.
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Affiliation(s)
- Wing-Fu Lai
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China;
- Ciechanover Institute of Precision and Regenerative Medicine, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China
- Correspondence:
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China;
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13
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Lee S, Zhou J, Lakhani I, Yang L, Liu T, Zhang Y, Xia Y, Wong WT, Chan EWY, Wong ICK, Tse G, Zhang Q. Programmed Cell Death 1 (PD-1) and Programmed Cell Death Ligand 1 (PD-L1) inhibitors and adverse cardiovascular events: a population-based study. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehab849.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
OnBehalf
Cardiovascular Analytics Group
Background
Programmed death-1 (PD-1) and programmed death-ligand 1 (PD-L1) inhibitors are major classes of immune checkpoint inhibitors that are increasingly used for cancer treatment. However, they are associated with adverse cardiovascular events.
Purpose
To evaluate the cardiotoxicity of PD-1 and PD-L1 inhibitors, the present study aims to examine the incidence of new-onset cardiac complications in patients receiving PD-1 or PD-L1 inhibitors.
Methods
Patients receiving PD-1 or PD-L1 inhibitors since their launch up to December 31st, 2019 without pre-existing cardiac complications were included. Patient data were obtained using a territory-wide electronic health record database. The primary outcome was a composite of incident heart failure (HF), acute myocardial infarction (AMI), atrial fibrillation (AF) or atrial flutter followed up to August 31st, 2020. Propensity score matching between PD-L1 and PD-1 inhibitor use with a 1:1 ratio for patient demographics and comorbidities was performed.
Results
A total of 1925 patients were included. Over a median follow-up of 136 days (interquartile range [IQR]: 42-279), 318 (16.51%) patients met the primary outcome after PD-1/PD-L1 treatment: 242 (incidence rate [IR]: 12.57%) with HF, 38 (IR: 1.97%) with AMI, 53 (IR: 2.75%) with AF, 6 (IR: 0.31%) with atrial flutter. Compared with PD-1 inhibitor treatment, PD-L1 inhibitor treatment was significantly associated with a lower risk of composite outcome after matching (HR: 0.78, 95% CI: [0.62-0.99], P value = 0.0417). Patients who developed cardiovascular complications had shorter average readmission intervals and more hospitalization episodes after treatment with PD-1/PD-L1 inhibitors both before and after matching (P value < 0.0001).
Conclusions
Compared with PD-1 inhibitor users, PD-L1 inhibitor users had a significantly lower risk of new-onset composite cardiovascular complications. Abstract Figure. Kaplan-Meier survival curve
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Affiliation(s)
- S Lee
- The Chinese University of Hong Kong, Hong Kong, China
| | - J Zhou
- City University of Hong Kong, Hong Kong, Hong Kong
| | - I Lakhani
- The Chinese University of Hong Kong, Hong Kong, China
| | - L Yang
- 2nd Hospital of Tianjin Medical University, Tianjin, China
| | - T Liu
- 2nd Hospital of Tianjin Medical University, Tianjin, China
| | - Y Zhang
- Fuwai Hospital, CAMS and PUMC, Beijing, China
| | - Y Xia
- First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - W T Wong
- The Chinese University of Hong Kong, Hong Kong, China
| | - E W Y Chan
- The University of Hong Kong, Hong Kong, China
| | - I C K Wong
- The University of Hong Kong, Hong Kong, China
| | - G Tse
- University of Surrey, Guildford, United Kingdom of Great Britain & Northern Ireland
| | - Q Zhang
- City University of Hong Kong, Hong Kong, Hong Kong
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14
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Chan JSK, Zhou J, Li A, Tan M, Wong WT, Ciobanu A, Gkouziouta A, Letsas K, Liu T, Liu Y, Zhang Q, Tse G. Clustering analysis based on automated electrocardiographic measurements to identify prognostically distinct phenotypes in patients hospitalized for heart failure: a retrospective cohort study. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehab849.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
Heart failure (HF) is a heterogeneous disease with complex structural and electrophysiological derangements of the heart. Attempts to classify HF from the electrophysiological perspective are lacking.
Purpose
To use electrocardiographic (ECG) data for phenotypic classification of patients with HF.
Methods
In this retrospective cohort study, all adult patients hospitalized for HF during 2010-2016 at a tertiary center were included. Automated measurements of the first ECG obtained during the index admission were recorded. K-means clustering using premorbid conditions and selected ECG measurements were used to classify the cohort into four mutually exclusive clusters. The primary (all-cause and cardiovascular mortality) and secondary (ventricular arrhythmia (VA)) outcomes were compared between clusters using Cox regression analysis.
Results
In total, 2849 patients (1363 males, age 75.1 ± 13.4 years) were included. Over a mean follow-up period of 5.37 ± 4.10 years, all-cause and cardiovascular mortality occurred in 2071 (72.7%) and 600 (21.1%) patients respectively, while VA occurred in 110 patients (3.9%). Cluster 1 was characterised by a low heart rate and low ventricular activation time (VAT). Cluster 2 was characterised by old age, low absolute QRS area, and high QTc and QT dispersion. Cluster 3 was characterised by young age, and left ventricular hypertrophy (LVH), and few had history of VA. Cluster 4 was characterised by wide QRS, hypertension, ischaemic heart disease, high VAT, and high absolute T wave area. Cluster 4 had the highest and cluster 1 the lowest risks of all-cause (hazard ratio (HR) 2.96 [1.09, 1.50], p = 0.003; Figure A) and cardiovascular mortality (HR 2.90 [1.15, 2.11], p = 0.004; Figure B). Meanwhile, cluster 2 had the highest risk of VA (HR 2.23 [1.09, 3.85], p = 0.025; Figure C) while clusters 1 and 3 similarly had the lowest risks.
Conclusion
HF presents with clinically and electrophysiologically distinct phenotypes. Clustering analysis is useful in identifying HF phenotypes which are prognostically significant. Abstract Figures A, B, and C
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Affiliation(s)
- J S K Chan
- Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - J Zhou
- City University of Hong Kong, School of Data Science, Kowloon, Hong Kong
| | - A Li
- University of Calgary, Faculty of Science, Calgary, Canada
| | - M Tan
- University of Toronto, Toronto, Canada
| | - W T Wong
- The Chinese University of Hong Kong, School of Life Science, Hong Kong, China
| | - A Ciobanu
- Carol Davila University Of Medicine And Pharm, Faculty of Medicine, Bucharest, Romania
| | - A Gkouziouta
- Onassis Cardiac Surgery Center, Heart Failure and Transplant Unit, Athens, Greece
| | - K Letsas
- Evangelismos Hospital, Second Department of Cardiology, Laboratory of Cardiac Electrophysiology, Athens, Greece
| | - T Liu
- 2nd Hospital of Tianjin Medical University, Department of Cardiology, Tianjin Institute of Cardiology, Tianjin, China
| | - Y Liu
- The First Affiliated Hospital of Dalian Medical University, Heart Failure and Structural Cardiology Division, Dalian, China
| | - Q Zhang
- City University of Hong Kong, School of Data Science, Kowloon, Hong Kong
| | - G Tse
- Kent and Medway Medical School, Canterbury, United Kingdom of Great Britain & Northern Ireland
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15
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Zaman Q, Zhang D, Reddy OS, Wong WT, Lai WF. Roles and Mechanisms of Astragaloside IV in Combating Neuronal Aging. Aging Dis 2022; 13:1845-1861. [DOI: 10.14336/ad.2022.0126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Accepted: 01/26/2022] [Indexed: 11/18/2022] Open
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16
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Abstract
Graphene possesses a large specific surface area, a high Young's modulus, high fracture strength, high electrical conductivity, and excellent optical performance. It has been widely studied for biomedical use since its first appearance in the literature. This article offers an overview of the latest advances in the design of graphene-based materials for delivery of bioactive agents. To enhance the translation of these carriers into practical use, the toxicity involved is needed to be examined in future research in more detail. In addition, guidelines for standardizing experimental conditions during the evaluation of the performance of graphene-based materials are required to be established so that candidates showing higher practical potential can be more effectively identified for further development. This can streamline the optimization and use of graphene-based materials in delivery applications.
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Affiliation(s)
- Wing-Fu Lai
- Ciechanover Institute of Precision and Regenerative Medicine, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China.,Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, Special Administrative Region, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, Special Administrative Region, China
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17
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Li X, Fang X, Li S, Lui KH, Lo WS, Gu Y, Wong WT. Nitroreductase-Induced Aggregation of Gold Nanoparticles for "Off-On" Photoacoustic Imaging of Tumor Hypoxia. J Biomed Nanotechnol 2021; 17:2186-2197. [PMID: 34906279 DOI: 10.1166/jbn.2021.3195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Hypoxia is an important phenomenon due to insufficient oxygen supply in tumor tissue, and nitroreductase (NTR) is a characteristic enzyme used for evaluating hypoxia level in tumors. In this work, we designed a smart gold nanoparticle (AuNPs), modified by 16-mercaptoundecanoic acid (MHDA) and hypoxia-responsive 11-(2-nitro-1H-imidazol-1-yl)undecane-1-thiol (NI) ligand, that responds to the hypoxic environment in tumor sites. With proper surface ligand composition, the responsive nanoprobe exhibited aggregation through the bioreduction of the nitro group on NI ligands under hypoxic conditions and the UV-vis absorption peak maximum would shift to 630 nm from 530 nm, which acts as an "off-on" contrast agent for tumor hypoxic photoacoustic (PA) imaging. In vitro and in vivo experiments revealed that AuNPs@MHDA/NO₂ exhibited an enhanced PA signal in hypoxic conditions. This study demonstrates the potential of hypoxia-responsive AuNPs as novel and sensitive diagnostic agents, which lays a firm foundation for precise cancer treatment in the future.
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Affiliation(s)
- Xin Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Xueyang Fang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Shiying Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Kwok-Ho Lui
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Wai-Sum Lo
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
| | - Yanjuan Gu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
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18
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Lee S, Zhou J, Jeevaratnam K, Wong WT, Wong ICK, Mak C, Mok NS, Liu T, Zhang Q, Tse G. Paediatric/young versus adult patients with congenital long QT syndrome or catecholaminergic polymorphic ventricular tachycardia. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Congenital long QT syndrome (LQTS) and catecholaminergic ventricular tachycardia (CPVT) are less prevalent cardiac ion channelopathies than Brugada syndrome in Asia. The present study compared paediatric/young and adult patients with these conditions.
Method
This was a territory-wide retrospective cohort study of consecutive patients diagnosed with congenital LQTS and CPVT attending public hospitals in Hong Kong. The primary outcome was spontaneous ventricular tachycardia/ventricular fibrillation (VT/VF).
Results
A total of 142 congenital LQTS (mean onset age= 27±23 years old) and 16 CPVT (mean presentation age=11±4 years old) patients were included. For congenital LQTS, arrhythmias other than VT/VF (HR=4.67, 95% confidence interval = [1.53–14.3], p=0.007), initial VT/VF (HR=3.25 [1.29–8.16], p=0.012) and Schwartz score (HR=1.90 [1.11–3.26], p=0.020) were predictive of the primary outcome for the overall cohort, whilst arrhythmias other than VT/VF (HR=5.41 [1.36–21.4], p=0.016) and Schwartz score (HR=4.67 [1.48–14.7], p=0.009) were predictive for the adult subgroup (>25 years old; n=58). All CPVT patients presented before the age of 25 but no significant predictors of VT/VF were identified. A random survival forest model identified initial VT/VF, Schwartz score, initial QTc interval, family history of LQTS, initially asymptomatic, and arrhythmias other than VT/VF as the most important variables for risk prediction in LQTS, and initial VT/VF/sudden cardiac death, palpitations, QTc, initially symptomatic and heart rate in CPVT.
Conclusion
Clinical and ECG presentation vary between the pediatric/young and adult congenital LQTS population. All CPVT patients presented before the age of 25. Machine learning models achieved more accurate VT/VF prediction.
Funding Acknowledgement
Type of funding sources: None. Kaplan-Meier survival curve for LQTSKaplan-Meier survival curve for CPVT
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Affiliation(s)
- S Lee
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - J Zhou
- City University of Hong Kong, Hong Kong, Hong Kong
| | | | - W T Wong
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - I C K Wong
- The University of Hong Kong, Hong Kong, China
| | - C Mak
- Hong Kong Children's Hospital, Hong Kong, Hong Kong
| | - N S Mok
- Princess Margaret Hospital, Hong Kong, Hong Kong
| | - T Liu
- 2nd Hospital of Tianjin Medical University, Tianjin, China
| | - Q Zhang
- City University of Hong Kong, Hong Kong, Hong Kong
| | - G Tse
- University of Surrey, Guildford, United Kingdom
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19
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Man LF, Kwong TL, Wong WT, Yung KF. Mesoporous Zn/MgO Hexagonal Nano-Plates as a Catalyst for Camelina Oil Biodiesel Synthesis. Nanomaterials (Basel) 2021; 11:nano11102690. [PMID: 34685131 PMCID: PMC8540754 DOI: 10.3390/nano11102690] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/11/2021] [Accepted: 10/11/2021] [Indexed: 01/22/2023]
Abstract
A novel mesoporous Zn/MgO hexagonal-nano-plate catalyst was synthesized by a simple template-free hydrothermal method and applied in the base-catalyzed transesterification of Camelina oil for biodiesel synthesis. The Zn/MgO catalyst calcinated at 873 K exhibited the highest catalytic activity with a yield of 88.7%. This catalytic reaction was performed using 3% w/w of the catalyst with a methanol-to-oil molar ratio of 24:1 at 393 K in 8 h. The excellent catalytic performance is possibly attributed to its favorable textural features with relatively high surface area (69.1 m2 g−1) and appropriate size of the mesopores (10.4 nm). In addition, the as-synthesized catalyst demonstrated a greater basic sites density than single mesoporous MgO, which might have been promoted by the addition of Zn, leading to a synergetic interaction that enhanced its catalytic activity. This catalytic system demonstrated high stability for five catalytic runs and catalytic activity with over 84% yield.
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Affiliation(s)
- Lai-Fan Man
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China;
| | - Tsz-Lung Kwong
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
- Correspondence: (W.-T.W.); (K.-F.Y.)
| | - Ka-Fu Yung
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
- Correspondence: (W.-T.W.); (K.-F.Y.)
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20
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Jiang L, Mak HN, Walter ERH, Wong WT, Wong KL, Long NJ. A fluorescent probe for the discrimination of oxidation states of palladium. Chem Sci 2021; 12:9977-9982. [PMID: 34349968 PMCID: PMC8317638 DOI: 10.1039/d1sc01616d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 06/24/2021] [Indexed: 12/27/2022] Open
Abstract
Palladium-based catalysts are widely used in pharmaceutical industries, which can sometimes cause palladium contamination in pharmaceutical drug manufacture. It is important to separately quantify the different oxidation states of palladium (Pd0 and Pd2+) in pharmaceuticals as they react with scavengers differently. Although palladium sensors have been under intense investigation, oxidation state differentiators are very rare. Here, we report a simple porphyrin–coumarin conjugate, PPIX-L2, that can selectively discriminate between the oxidation states of palladium. The reaction of PPIX-L2 with Pd0 showed a 24-fold fluorescence increase of the coumarin emission, meanwhile, the presence of Pd2+ led to a 98% quenching of the porphyrin emission. Fluorescent responses of PPIX-L2 towards Pd0 and Pd2+ are specific, and its sensitivity towards both palladium species is significantly increased with a detection limit of 75 nM and 382 nM for Pd0 and Pd2+ respectively. A simple porphyrin–coumarin conjugate PPIX-L2 was developed for the discrimination of different oxidation states of palladium (Pd0 and Pd2+), and with a significantly improved sensitivity.![]()
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Affiliation(s)
- Lijun Jiang
- Department of Chemistry, Imperial College London MSRH Building, White City Campus London W12 0BZ UK .,Department of Chemistry, Hong Kong Baptist University Kowloon Tong Kowloon Hong Kong SAR China .,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR China
| | - Ho-Nam Mak
- Department of Chemistry, Imperial College London MSRH Building, White City Campus London W12 0BZ UK .,Department of Chemistry, Hong Kong Baptist University Kowloon Tong Kowloon Hong Kong SAR China .,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR China
| | - Edward R H Walter
- Department of Chemistry, Imperial College London MSRH Building, White City Campus London W12 0BZ UK
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR China
| | - Ka-Leung Wong
- Department of Chemistry, Hong Kong Baptist University Kowloon Tong Kowloon Hong Kong SAR China
| | - Nicholas J Long
- Department of Chemistry, Imperial College London MSRH Building, White City Campus London W12 0BZ UK
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21
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Lai WF, Gui D, Wong M, Döring A, Rogach AL, He T, Wong WT. A self-indicating cellulose-based gel with tunable performance for bioactive agent delivery. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102428] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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22
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Lui KH, Li S, Lo WS, Gu Y, Wong WT. In vivo photoacoustic imaging for monitoring treatment outcome of corneal neovascularization with metformin eye drops. Biomed Opt Express 2021; 12:3597-3606. [PMID: 34221681 PMCID: PMC8221937 DOI: 10.1364/boe.423982] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 05/25/2023]
Abstract
Corneal neovascularization (CNV) compromises corneal avascularity and visual acuity. Current clinical visualization approaches are subjective and unable to provide molecular information. Photoacoustic (PA) imaging offers an objective and non-invasive way for angiogenesis investigation through hemodynamic and oxygen saturation level (sO2) quantification. Here, we demonstrate the utility of PA and slit lamp microscope for in vivo rat CNV model. PA images revealed untreated corneas exhibited higher sO2 level than treatment groups. The PA results complement with the color image obtained with slit lamp. These data suggest PA could offer an objective and non-invasive method for monitoring CNV progression and treatment outcome through the sO2 quantification.
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Affiliation(s)
- Kwok-Ho Lui
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
- These authors contributed equally
| | - Shiying Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
- These authors contributed equally
| | - Wai-sum Lo
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Yanjuan Gu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
- Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, China
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23
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Lai WF, Wong WT. Property-Tuneable Microgels Fabricated by Using Flow-Focusing Microfluidic Geometry for Bioactive Agent Delivery. Pharmaceutics 2021; 13:787. [PMID: 34070328 PMCID: PMC8228633 DOI: 10.3390/pharmaceutics13060787] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/17/2021] [Accepted: 05/20/2021] [Indexed: 11/16/2022] Open
Abstract
Gelatine methacryloyl (GM) shows high biocompatibility and is extensively used in tissue engineering; however, few works have explored the use of GM in bioactive agent delivery. This study adopts a microfluidic approach involving the use of flow-focusing microfluidic geometry for microgel fabrication. This approach generates highly monodisperse microgels whose size can be tuned by altering various fabrication conditions (including the concentration of the gel-forming solution and the flow rates of different phases). By using tetracycline hydrochloride as a model agent, the fabricated microgels enable prolonged agent release, with the encapsulation efficiency being around 30-40% depending on the concentration of the gel-forming solution. Along with their negligible cytotoxicity, our microgels show the potential to serve as carriers of bioactive agents for food and pharmaceutical applications.
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Affiliation(s)
- Wing-Fu Lai
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China;
- Ciechanover Institute of Precision and Regenerative Medicine, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China;
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24
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Lee S, Zhou J, Guo CL, Wu WKK, Wong WT, Liu T, Wong ICK, Jeevaratnam K, Zhang Q, Tse G. Risk stratification score for acute myocardial infarction and sudden cardiac death in type 2 diabetes mellitus. Eur J Prev Cardiol 2021. [DOI: 10.1093/eurjpc/zwab061.459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Introduction
Acute myocardial infarction (AMI) and sudden cardiac death (SCD) are major cardiovascular adverse outcomes in patients with type 2 diabetic mellitus. Although there are many risk scores on composite outcomes of major cardiovascular adverse outcomes or cardiovascular mortality for diabetic patients, these existing scores did not account for the difference in pathogenesis and prognosis between acute coronary syndrome and lethal ventricular arrhythmias. Furthermore, recent studies reported that HbA1c and lipid levels, which were often accounted for in these risk scores, have J/U-shaped relationships with adverse outcomes.
Purpose
The present study aims to evaluate the application of incorporating non-linear J/U-shaped relationships between mean HbA1c and cholesterol levels into risk scores for predicting for AMI and non-AMI related SCD respectively, amongst type 2 diabetes mellitus patients.
Methods
This was a territory-wide cohort study of patients with type 2 diabetes mellitus above the age 40 and free from prior AMI and SCD, with or without prescriptions of anti-diabetic agents between January 1st, 2009 to December 31st, 2009 at government-funded hospitals and clinics in Hong Kong. Risk scores were developed for predicting incident AMI and non-AMI related SCD. The performance of conditional inference survival forest (CISF) model compared to that of random survival forests (RSF) model and multivariate Cox model.
Results
This study included 261308 patients (age = 66.0 ± 11.8 years old, male = 47.6%, follow-up duration = 3552 ± 1201 days, diabetes duration = 4.77 ± 2.29 years). Mean HbA1c and high-density lipoprotein-cholesterol (HDL-C) were significant predictors of AMI under multivariate Cox regression and were linearly associated with AMI. Mean HbA1c and total cholesterol were significant multivariate predictors with a J-shaped relationship with non-AMI related SCD. The AMI and SCD risk scores had an area-under-the-curve (AUC) of 0.666 (95% confidence interval (CI)= [0.662, 0.669]) and 0.677 (95% CI= [0.673, 0.682]), respectively. CISF significantly improves prediction performance of both outcomes compared to RSF and multivariate Cox models.
Conclusions
A holistic combination of demographic, clinical, and laboratory indices can be used for the risk stratification of type 2 diabetic patients against AMI and SCD.
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Affiliation(s)
- S Lee
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - J Zhou
- City University of Hong Kong, Hong Kong, China
| | - CL Guo
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - WKK Wu
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - WT Wong
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - T Liu
- 2nd Hospital of Tianjin Medical University, Tianjin, China
| | - ICK Wong
- The University of Hong Kong, Hong Kong, China
| | - K Jeevaratnam
- University of Surrey, Faculty of Health and Medical Sciences, Guildford, United Kingdom of Great Britain & Northern Ireland
| | - Q Zhang
- City University of Hong Kong, Hong Kong, China
| | - G Tse
- University of Surrey, Faculty of Health and Medical Sciences, Guildford, United Kingdom of Great Britain & Northern Ireland
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Affiliation(s)
- Wing-Fu Lai
- Department of Applied Biology and Chemical Technology Hong Kong Polytechnic University Hong Kong Special Administrative Region China
- School of Life and Health Sciences The Chinese University of Hong Kong (Shenzhen) Shenzhen 518172 China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology Hong Kong Polytechnic University Hong Kong Special Administrative Region China
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Abstract
Quercetin is a flavonoid present in a wide variety of plant resources. Over the years, extensive efforts have been devoted to examining the potential biological effects of quercetin and to manipulating the chemical and physical properties of the flavonoid. However, limited studies have reviewed the opportunities and challenges of using quercetin in the development of functional foods. To address this necessity, in this review; we foremost present an overview of the chemical properties and stability of quercetin in food products followed by a detailed discussion of various strategies that enhance its oral bioavailability. We further highlight the areas to be practically considered during development of quercetin-based functional foods. By revisiting the current status of applied research on quercetin, it is anticipated that useful insights enabling research on quercetin can be potentially translated into practical applications in food product development.
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Affiliation(s)
- Wing-Fu Lai
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China.,Ciechanover Institute of Precision and Regenerative Medicine, The Chinese University of Hong Kong (Shenzhen), Shenzhen, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
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27
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Liu X, Du ZR, Wang X, Luk KH, Chan CH, Cao X, Zhao Q, Zhao F, Wong WT, Wong KH, Dong XL. Colonic Dopaminergic Neurons Changed Reversely With Those in the Midbrain via Gut Microbiota-Mediated Autophagy in a Chronic Parkinson's Disease Mice Model. Front Aging Neurosci 2021; 13:649627. [PMID: 33912026 PMCID: PMC8071868 DOI: 10.3389/fnagi.2021.649627] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 03/17/2021] [Indexed: 11/13/2022] Open
Abstract
The role of gut-brain axis in the pathogenesis of Parkinson's disease (PD) have become a research hotspot, appropriate animal model to study gut-brain axis in PD is yet to be confirmed. Our study employed a classical PD mice model achieved by chronic MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) injection to study concurrent changes of dopaminergic neurons in the midbrain and the colon of mice. Our results showed such a PD model exhibited apparent locomotor deficits but not gastrointestinal dysfunction. Tyrosine hydroxylase expressions and dopamine content reduced greatly in the substantia nigra pars compacta (SNpc) or striatum, but increased in the colon of PD mice. Mechanism investigation indicated autophagy activity and apoptosis were stimulated in the SNpc, but inhibited in the colon of PD mice. Interplay of gut microbiota (GM) and autophagy in response to chronic MPTP injection led to GM dysbiosis and defective autophagy in mice colon. Meanwhile, fecal short chain fatty acids (SCFAs), acetate and propionate in particular, declined greatly in PD mice, which could be attributed to the decreased bacteria abundance of phylum Bacteroidetes, but increased abundance of phylum Firmicutes. GM dysbiosis derived fecal SCFAs might be one of the mediators of downregulated autophagy in the colon of PD mice. In conclusion, colonic dopaminergic neurons changed in the opposition direction with those in the midbrain via GM dysbiosis-mediated autophagy inhibition followed by suppressed apoptosis in response to chronic MPTP injection. Such a chronic PD mice model might not be an ideal model to study role of gut-brain axis in PD progression.
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Affiliation(s)
- Xin Liu
- Key Laboratory of Food Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Institute, Shenzhen, China.,Research Institute for Future Food, The Hong Kong Polytechnic University, Hong Kong, China.,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Zhong-Rui Du
- Key Laboratory of Food Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Institute, Shenzhen, China.,Research Institute for Future Food, The Hong Kong Polytechnic University, Hong Kong, China.,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,College of Physical Education, Ludong University, Yantai, China
| | - Xiong Wang
- Key Laboratory of Food Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Institute, Shenzhen, China
| | - Kar-Him Luk
- Key Laboratory of Food Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Institute, Shenzhen, China.,Research Institute for Future Food, The Hong Kong Polytechnic University, Hong Kong, China.,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Cheuk-Hin Chan
- Key Laboratory of Food Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Institute, Shenzhen, China.,Research Institute for Future Food, The Hong Kong Polytechnic University, Hong Kong, China.,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Xu Cao
- Department of Neurology, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China.,Department of Neurology, Shenzhen People's Hospital, Jinan University, Shenzhen, China
| | - Qing Zhao
- Department of Neurology, Linzi Maternal and Child Health Hospital of Zibo, Zibo, China
| | - Fang Zhao
- Beijing Genomics Institute (BGI)-Qingdao, BGI-Shenzhen, Qingdao, China
| | - Wing-Tak Wong
- Key Laboratory of Food Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Institute, Shenzhen, China.,Research Institute for Future Food, The Hong Kong Polytechnic University, Hong Kong, China.,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Ka-Hing Wong
- Key Laboratory of Food Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Institute, Shenzhen, China.,Research Institute for Future Food, The Hong Kong Polytechnic University, Hong Kong, China.,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Xiao-Li Dong
- Key Laboratory of Food Biological Safety Control, The Hong Kong Polytechnic University Shenzhen Institute, Shenzhen, China.,Research Institute for Future Food, The Hong Kong Polytechnic University, Hong Kong, China.,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
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28
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Li S, Lui KH, Li X, Fang X, Lo WS, Gu YJ, Wong WT. pH-Triggered Poly(ethylene glycol)–Poly(lactic acid/glycolic acid)/Croconaine Nanoparticles-Assisted Multiplexed Photoacoustic Imaging and Enhanced Photothermal Cancer Therapy. ACS Appl Bio Mater 2021; 4:4152-4164. [DOI: 10.1021/acsabm.0c01578] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shiying Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Kwok-Ho Lui
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Xin Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Xueyang Fang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Wai-Sum Lo
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Yan-Juan Gu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
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29
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Wang Y, Lim YY, He Z, Wong WT, Lai WF. Dietary phytochemicals that influence gut microbiota: Roles and actions as anti-Alzheimer agents. Crit Rev Food Sci Nutr 2021; 62:5140-5166. [PMID: 33559482 DOI: 10.1080/10408398.2021.1882381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The last decide has witnessed a growing research interest in the role of dietary phytochemicals in influencing the gut microbiota. On the other hand, recent evidence reveals that dietary phytochemicals exhibit properties of preventing and tackling symptoms of Alzheimer's disease, which is a neurodegenerative disease that has also been linked with the status of the gut microbiota over the last decade. Till now, little serious discussions, however, have been made to link recent understanding of Alzheimer's disease, dietary phytochemicals and the gut microbiota together and to review the roles played by phytochemicals in gut dysbiosis induced pathologies of Alzheimer's disease. Deciphering these connections can provide insights into the development and future use of dietary phytochemicals as anti-Alzheimer drug candidates. This review aims at presenting latest evidence in the modulating role of phytochemicals in the gut microbiota and its relevance to Alzheimer's disease and summarizing the mechanisms behind the modulative activities. Limitations of current research in this field and potential directions will also be discussed for future research on dietary phytochemicals as anti-Alzheimer agents.
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Affiliation(s)
- Yi Wang
- School of Agriculture and Food Sciences, University of Queensland, St Lucia, Queensland, Australia.,School of Dentistry, University of Queensland, Herston, Queensland, Australia
| | - Yau-Yan Lim
- School of Science, Monash University, Bandar Sunway, Selangor, Malaysia
| | - Zhendan He
- College of Pharmacy, Shenzhen Technology University, Shenzhen, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| | - Wing-Fu Lai
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China.,School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, China
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30
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Fang X, Lui KH, Li S, Lo WS, Li X, Gu Y, Wong WT. Multifunctional Nanotheranostic Gold Nanocage/Selenium Core-Shell for PAI-Guided Chemo-Photothermal Synergistic Therapy in vivo. Int J Nanomedicine 2020; 15:10271-10284. [PMID: 33364758 PMCID: PMC7751612 DOI: 10.2147/ijn.s275846] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 12/05/2020] [Indexed: 12/30/2022] Open
Abstract
Introduction Cancer theragnosis involving cancer diagnosis and targeted therapy simultaneously in one integrated system would be a promising solution of cancer treatment. Herein, a convenient and practical cancer theragnosis agent was constructed by combining gold nanocages (AuNCs) covered with selenium and a chitosan (CS) shell (AuNCs/Se) to incorporate the anti-cancer drug doxorubicin (DOX) as a multifunctional targeting nanocomposite (AuNCs/DOX@Se-iRGD) for photoacoustic imaging (PAI)-guided chemo-photothermal synergistic therapy that contributes to enhanced anti-cancer efficacy. The novel design of AuNCs/DOX@Se-iRGD gives the nanocomposite two outstanding properties: (1) AuNCs, with excellent LSPR property in the NIR region, act as a contrast agent for enhanced PAI and photothermal therapy (PTT); (2) Se acts as an anti-cancer nanoagent and drug delivery cargo. Methods The photothermal performance of these nanocomposites was evaluated in different concentrations with laser powder densities. These nanocomposites were also incubated in pH 5.3, 6.5, 7.4 PBS and NIR laser to study their drug release ability. The cellular uptake was studied by measuring the Se and Au concentrations inside the cells using inductively coupled plasma-mass spectrometry (ICP-MS). Besides, in vitro and in vivo anti-tumor activity were carried out by cytotoxicity assay MTT and tumor model nude mice, respectively. As for imaging, the PA value and images of these nanocomposites accumulated in the tumor site were sequentially collected at specific time points for 48 h. Results and Discussion The prepared AuNCs/DOX@Se-iRGD showed excellent biocompatibility and physiological stability in different media. In vivo results indicated that the targeting nanocomposite presented the strongest contrast-enhanced PAI signals, which could provide contour and location information of tumor, 24 h after intravenous injection. Likewise, the combined treatment of chemo- and photothermal synergistic therapy significantly inhibited tumor growth when compared with the two treatments carried out separately and showed negligible acute toxicity to the major organs. Conclusion This study demonstrates that AuNCs/DOX@Se-iRGD has great prospect to become a multifunctional anti-tumor nanosystem for PAI-guided chemo- and photothermal synergistic therapy.
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Affiliation(s)
- Xueyang Fang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, People's Republic of China
| | - Kwok-Ho Lui
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, People's Republic of China
| | - Shiying Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, People's Republic of China
| | - Wai-Sum Lo
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, People's Republic of China
| | - Xin Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, People's Republic of China
| | - Yanjuan Gu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, People's Republic of China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region, People's Republic of China
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31
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Abstract
Liposomes are small spherical vesicles composed mainly of phospholipids and cholesterol. Over the years, a number of liposomal formulations have shown clinical promise, but the use of liposomes in oral drug delivery is limited. This is partly due to the vulnerability of conventional liposomes to the detrimental effect of gastrointestinal destabilizing factors and also to the poor efficiency in intestinal absorption of liposomes. Some of these issues can be ameliorated using the layer-by-layer (LbL) assembly technology, which has been widely applied to modify the surface of various nanoparticulate systems. Discussions about LbL functionalization of liposomes as oral drug carriers, however, are scant in the literature. To fill this gap, this review presents an overview of the roles of LbL functionalization in the development of liposomes, followed by a discussion about major principles of molecular design and engineering of LbL-functionalized liposomes for oral drug delivery. Regarding the versatility offered by LbL assembly, it is anticipated that LbL-functionalized liposomes may emerge as one of the important carriers for oral drug administration in the future.
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Affiliation(s)
- Wing-Fu Lai
- School of Pharmaceutical Sciences, Shenzhen University, Shenzhen 518060, China
- Ciechanover Institute of Precision and Regenerative Medicine, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, China
| | - Andrey L Rogach
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, Kowloon Tong, Hong Kong SAR, China
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32
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Lai WF, Tang R, Wong WT. Ionically Crosslinked Complex Gels Loaded with Oleic Acid-Containing Vesicles for Transdermal Drug Delivery. Pharmaceutics 2020; 12:E725. [PMID: 32748814 PMCID: PMC7465615 DOI: 10.3390/pharmaceutics12080725] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 07/21/2020] [Accepted: 07/27/2020] [Indexed: 12/02/2022] Open
Abstract
Skin is an attractive site for drug administration partly because of its easy accessibility and favorable properties (e.g., less invasiveness and high patient compliance) over some other common routes of administration. Despite this, the efficiency in transdermal drug delivery has been largely limited by poor skin permeation. To address this problem, this study reports the generation of oleic acid-containing vesicles, which can enhance the drug delivery efficiency while showing good stability and limited skin disruption. Upon being loaded into a complex gel, along with the incorporation of the polymer blending technique, a delivery system exhibiting tunable transdermal flux of 2,3,5,4'-tetrahydroxystilbene 2-O-β-D-glucoside is reported. Taking the good biocompatibility and tunable delivery performance into account, our system warrants further development and optimization for future applications in the treatment of skin diseases.
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Affiliation(s)
- Wing-Fu Lai
- School of Pharmaceutical Sciences, Shenzhen University, Shenzhen 518060, China;
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen 518172, China
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China;
| | - Ryan Tang
- School of Pharmaceutical Sciences, Shenzhen University, Shenzhen 518060, China;
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China;
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33
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34
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Affiliation(s)
- L Ling
- The Chinese University of Hong Kong, China
| | - W T Wong
- The Chinese University of Hong Kong, China
| | - W T P Wan
- The Chinese University of Hong Kong, China
| | - G Choi
- The Chinese University of Hong Kong, China
| | - G M Joynt
- The Chinese University of Hong Kong, China
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35
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Lai WF, Wong WT. Roles of the actin cytoskeleton in aging and age-associated diseases. Ageing Res Rev 2020; 58:101021. [PMID: 31968269 DOI: 10.1016/j.arr.2020.101021] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 01/06/2020] [Accepted: 01/17/2020] [Indexed: 12/12/2022]
Abstract
The integrity of the cytoskeleton is essential to diverse cellular processes such as phagocytosis and intracellular trafficking. Disruption of the organization and dynamics of the actin cytoskeleton leads to age-associated symptoms and diseases, ranging from cancer to neurodegeneration. In addition, changes in the integrity of the actin cytoskeleton disrupt the functioning of not only somatic and stem cells but also gametes, resulting in aberrant embryonic development. Strategies to preserve the integrity and dynamics of the cytoskeleton are, therefore, potentially therapeutic to age-related disorders. The objective of this article is to revisit the current understanding of the roles played by the actin cytoskeleton in aging, and to review the opportunities and challenges for the transition of basic research into intervention development. It is hoped that, with the snapshot of evidence regarding changes in actin dynamics with advanced age, insights into future research directions can be attained.
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Affiliation(s)
- Wing-Fu Lai
- School of Pharmaceutical Sciences, Shenzhen University, PR China; School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, PR China; Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, PR China.
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, PR China
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36
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Lai WF, Wong WT, Rogach AL. Development of Copper Nanoclusters for In Vitro and In Vivo Theranostic Applications. Adv Mater 2020; 32:e1906872. [PMID: 31975469 DOI: 10.1002/adma.201906872] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Revised: 11/23/2019] [Indexed: 05/24/2023]
Abstract
Theranostics refers to the incorporation of therapeutic and diagnostic functions into one material system. An important class of nanomaterials exploited for theranostics is metal nanoclusters (NCs). In contrast to gold and silver NCs, copper is an essential trace element for humans. It can be more easily removed from the body. This, along with the low cost of copper that offers potential large-scale nanotechnology applications, means that copper NCs have attracted great interest in recent years. The latest advances in the design, synthesis, surface engineering, and applications of copper NCs in disease diagnosis, monitoring, and treatment are reviewed. Strategies to control and enhance the emission of copper NCs are considered. With this synopsis of the up-to-date development of copper NCs as theranostic agents, it is hoped that insights and directions for translating current advances from the laboratory to the clinic can be further advanced and accelerated.
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Affiliation(s)
- Wing-Fu Lai
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, P. R. China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, P. R. China
| | - Andrey L Rogach
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, Kowloon, Hong Kong SAR, P. R. China
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen, 518057, P. R. China
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37
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Li C, Zeng C, Chen Z, Jiang Y, Yao H, Yang Y, Wong WT. Luminescent lanthanide metal-organic framework test strip for immediate detection of tetracycline antibiotics in water. J Hazard Mater 2020; 384:121498. [PMID: 31796349 DOI: 10.1016/j.jhazmat.2019.121498] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 10/17/2019] [Accepted: 10/17/2019] [Indexed: 05/16/2023]
Abstract
Tetracycline antibiotics (TCs) are a kind of commonly used antibiotics for treating infections, however, the overuse of TCs has adversely affected human health and the ecosystem. Thus, detection of TCs in water is important but challenging. In this work, a luminescent lanthanide metal-organic framework (LnMOF) sensor (1) for immediate detection of oxytetracycline (OTC) and tetracycline (TC) is developed. The sensor has high acid-base and water stability. Investigation reveals that among the 27 species of antibiotics, anions and cations under investigation, 1 shows highly selective sensing towards OTC and TC, and the detection is not disturbed by the presence of other species. The limit of detection (LOD) for OTC and TC are ultra-sensitive value of 1.95 and 2.77 nM, respectively. Investigation reveals the sensing mechanism is due to the inner filter effect. Further studies reveal that the sensor can be used in real sample monitoring. More importantly, test strips based on 1 are manufactured. They are an easy-to-use, low-cost, highly selective and sensitive sensing device for detecting OTC and TC. The sensing can be distinguished immediately and easily by the naked eyes, making it an excellent candidate to monitor OTC and TC in real use.
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Affiliation(s)
- Chongliang Li
- School of Materials Science and Engineering, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China; College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang, 330022, PR China
| | - Chenghui Zeng
- School of Materials Science and Engineering, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China; College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang, 330022, PR China.
| | - Zhao Chen
- School of Materials Science and Engineering, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China; College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang, 330022, PR China
| | - Yefei Jiang
- College of Chemistry and Chemical Engineering, Research Center for Ultra Fine Powder Materials, Key Laboratory of Functional Small Organic Molecule, Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang, 330022, PR China
| | - Hua Yao
- School of Materials Science and Engineering, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Yangyi Yang
- School of Materials Science and Engineering, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, PR China
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38
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Li LQ, Song AX, Yin JY, Siu KC, Wong WT, Wu JY. Anti-inflammation activity of exopolysaccharides produced by a medicinal fungus Cordyceps sinensis Cs-HK1 in cell and animal models. Int J Biol Macromol 2020; 149:1042-1050. [PMID: 32035153 DOI: 10.1016/j.ijbiomac.2020.02.022] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/28/2020] [Accepted: 02/03/2020] [Indexed: 02/07/2023]
Abstract
This study was to assess the anti-inflammatory potential of exopolysaccharide (EPS) produced by a medicinal fungus Cordyceps sinensis Cs-HK1. The EPS was isolated from the Cs-HK1 mycelial fermentation broth by ethanol precipitation and purified by deproteinization and dialysis. The EPS had a total sugar content of 74.8% and a maximum average molecular weight (MW) over 107 Da, and consisted mainly of glucose and mannose, and a small amount of galactose and ribose. In THP-1 and RAW264.7 cell cultures, EPS significantly inhibited lipopolysaccharide (LPS)-induced inflammatory responses of the cells including the release of NF-κB and several pro-inflammatory factors such as NO, TNF-α and IL-1β. In the murine model of LPS-induced acute intestinal injury, the oral administration of EPS to the animals effectively suppressed the expression of major inflammatory cytokines TNF-α, IL-1β, IL-10 and iNOS and alleviated the intestinal injury. The results suggest that the Cs-HK1 EPS has notable anti-inflammatory activity and can be a potential candidate for further development of new anti-septic therapeutics. To the best of our knowledge, this is the first report on the anti-inflammation of an EPS from C. sinensis fungal fermentation.
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Affiliation(s)
- Long-Qing Li
- Department of Applied Biology & Chemical Technology, State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) in Shenzhen, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Ang-Xin Song
- Department of Applied Biology & Chemical Technology, State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) in Shenzhen, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Jun-Yi Yin
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Ka-Chai Siu
- Department of Applied Biology & Chemical Technology, State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) in Shenzhen, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wing-Tak Wong
- Department of Applied Biology & Chemical Technology, State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) in Shenzhen, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Jian-Yong Wu
- Department of Applied Biology & Chemical Technology, State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) in Shenzhen, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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39
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Chan BD, Wong G, Jiang Q, Lee MML, Wong WY, Chen F, Wong WT, Zhu L, Wong FKM, Tai WCS. Longitudinal study of BK Polyomavirus outcomes, risk factors, and kinetics in renal transplantation patients. Microb Pathog 2020; 142:104036. [PMID: 32017958 DOI: 10.1016/j.micpath.2020.104036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 01/31/2020] [Accepted: 01/31/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND In the immunocompromised conditions following renal transplantation, BK virus can reactivate and cause BK virus associated nephropathy (BKVN). Increased BK viral loads and extended duration of infection have been linked to development of BKVN. The aim of this study was to observe the incidence of BKV infection and BKVN, and kinetics of infection and disease in renal transplantation recipients. METHODS From 2014 to 2018, we conducted a longitudinal cohort observational study of 139 renal transplantation patients treated at a single clinic. Quantitative PCR assay was conducted to assess longitudinal BK viral loads. Analysis of patient clinical characteristics was performed to determine risk factors for BKV infection and associated disease. RESULTS Of our cohort, 29 (20.9%) patients developed high BK viremia, and 7 (5.0%) developed biopsy-confirmed BKVN. Clinical parameters associated with diabetes (FBS, HbA1c) and hyperlipidemia (TG, TC, LDL-C) were found to be correlated with development of high BK viremia or BKVN. In 3 of 4 patients receiving intravenous immunoglobulin (IVIG) treatment, BK viral loads were reduced by at least 1 log within 2-3 months of administration. Significant differences were measured in BK viral loads and kidney function between BK viremic patients and BKVN patients by 3-9 months post-transplantation. CONCLUSIONS We identified diabetes and hyperlipidemia as potential risk factors for development of high BK viremia and/or BKVN. IVIG was seen to be effective in reducing viral titers. The period 3-9 months post-transplantation was identified as important for development of BKVN from high BK viremia.
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Affiliation(s)
- Brandon Dow Chan
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong S.A.R, China
| | - Gabriella Wong
- Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
| | - Qing Jiang
- School of Statistics, Beijing Normal University, Beijing, China
| | - Magnolia Muk-Lan Lee
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong S.A.R, China
| | - Wing-Yan Wong
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong S.A.R, China
| | - Feifei Chen
- School of Statistics, Renmin University of China, Beijing, China
| | - Wing-Tak Wong
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong S.A.R, China; State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
| | - Lixing Zhu
- Department of Mathematics, The Hong Kong Baptist University, Kowloon Tong, Hong Kong S.A.R, China
| | | | - William Chi-Shing Tai
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong S.A.R, China; State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China.
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40
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Lai WF, Wong E, Wong WT. Multilayered composite-coated ionically crosslinked food-grade hydrogel beads generated from algal alginate for controlled and sustained release of bioactive compounds. RSC Adv 2020; 10:44522-44532. [PMID: 35517137 PMCID: PMC9058451 DOI: 10.1039/d0ra07827a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 11/25/2020] [Indexed: 12/24/2022] Open
Abstract
Hydrogels have gained interest as sustained-release matrices partly because of their high biocompatibility and ease of preparation. Their wide application has, however, been limited by their poor mechanical strength and their lack of tunability in the performance of bioactive agent delivery. By using the lake substratum as a gel property modifier, in combination with the use of the surface coating approach and the ionic gelation technique, hydrogel beads are generated from algal alginate for controlled and sustained release of bioactive compounds. Both the acute and chronic toxicity of the beads are found to be negligible in 3T3 fibroblasts. The capacity of the beads in retaining the activity of the loaded agent is verified by the negligible change in the action of the loaded compound on foodborne bacteria (viz., Staphylococcus aureus and Escherichia coli). Along with the high flexibility provided by the adopted method in the choice of coating materials, our beads extend the limitations of conventional ionically crosslinked gel systems, and show high potential for applications in functional food development, nutraceutical delivery, and pharmaceutical formulation. Multilayered composite-coated hydrogel beads are generated from algal alginate as carriers of bioactive compounds. They show high potential for applications in functional food development, nutraceutical delivery, and pharmaceutical formulation.![]()
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Affiliation(s)
- Wing-Fu Lai
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- China
- Shenzhen Key Laboratory of Steroid Drug Discovery and Development
- School of Life and Health Sciences
| | - Eric Wong
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology
- Hong Kong Polytechnic University
- China
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41
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Li KH, Ho J, Xu Z, Lakhani I, Bazoukis G, Liu T, Wong WT, Cheng SH, Chan MTV, Gin T, Wong MCS, Wong I, Wu WKK, Zhang Q, Tse G. P5014The NPAC score for predicting survival after incident acute myocardial infarction. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Risk stratification in acute myocardial infarction (AMI) is important for guiding clinical management. Current risk scores are mostly derived from clinical trials with stringent patient selection. We aimed to establish and evaluate a composite scoring system to predict short-term mortality after index episodes of AMI, independent of electrocardiography (ECG) pattern, in a large real-world cohort.
Methods
Using electronic health records, patients admitted to our regional teaching hospital (derivation cohort, n=2127) and an independent tertiary care center (validation cohort, n=1276) with index acute myocardial infarction between January 2013 and December 2017 as confirmed by principal diagnosis and laboratory findings, were identified retrospectively.
Results
Univariate logistic regression was used as the primary model to identify potential contributors to mortality. Stepwise forward likelihood ratio logistic regression revealed that neutrophil-to-lymphocyte ratio, peripheral vascular disease, age, and serum creatinine (NPAC) were significant predictors for 90-day mortality (Hosmer-Lemeshow test, P=0.21). Each component of the NPAC score was weighted by beta-coefficients in multivariate analysis. The C-statistic of the NPAC score was 0.75, which was higher than the conventional Charlson's score (C-statistic=0.63). Application of a deep learning model to our dataset improved the accuracy of classification with a C-statistic of 0.81.
Multivariate binary logistic regression Variable β Adjusted Odds ratio (95% CI) P-value Points Age ≥65 years 1.304 3.68 (2.63–5.17) <0.001 2 Peripheral vascular disease 1.109 3.03 (1.52–6.04) 0.002 2 NLRt ≥9.51 1.100 2.73 (2.12–3.51) <0.001 1 Creatinine≥109 μmol/L 1.003 3.00 (2.35–3.85) <0.001 2
NPAC deep learning model
Conclusions
The NPAC score comprised of four items from routine laboratory parameters and basic clinical information and can facilitate early identification of cases at risk of short-term mortality following index myocardial infarction. Deep learning model can serve as a gate-keeper to provide more accurate prediction to facilitate clinical decision making.
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Affiliation(s)
- K H Li
- Newcastle University, Newcastle upon Tyne, United Kingdom
| | - J Ho
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Z Xu
- The Chinese University of Hong Kong, Institute of Digestive Disease, Li Ka Shing Institute of Health Sciences, Hong Kong, Hong Kong
| | - I Lakhani
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - G Bazoukis
- Evangelismos General Hospital of Athens, Cardiology, Athens, Greece
| | - T Liu
- 2nd Hospital of Tianjin Medical University, Cardiology, Tianjin, China
| | - W T Wong
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - S H Cheng
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - M T V Chan
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - T Gin
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - M C S Wong
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - I Wong
- The University of Hong Kong, Hong Kong, Hong Kong
| | - W K K Wu
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Q Zhang
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - G Tse
- The Chinese University of Hong Kong, Shatin, Hong Kong
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42
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He J, Lam SM, Ng JP, Wong WT, Chiu P. Intramolecular (4 + 3) cycloadditions of nitrogen-tethered epoxy enosilanes for the synthesis of heteropolycycles. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.04.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Abstract
Soybeans and their food products exist in the market in various forms, ranging from crude oils and bean meals to nutritious products (e.g. soy milk powers). With the availability of technologies for mass production of soy products and for enrichment of soy components (e.g. phospholipids, saponins, isoflavones, oligosaccharides and edible fiber), the nutritional values of soy products have been enhanced remarkably, offering the potential for functional food development. Among different bioactive components in soybeans, one important component is isoflavones, which have been widely exploited for health implications. While there are studies supporting the health benefits of isoflavones, concerns on adverse effects have been raised in the literature. The objective of this article is to review the recent understanding of the biological activities, adverse effects, and use of isoflavones in functional food development.
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Affiliation(s)
- Chengshen Hu
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
- Center for Human Tissue and Organs Degeneration, Institute of Biomedical and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| | - Runyu Wu
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
| | - Wing-Fu Lai
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
- School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, China
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44
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Lai WF, Hu C, Deng G, Lui KH, Wang X, Tsoi TH, Wang S, Wong WT. A biocompatible and easy-to-make polyelectrolyte dressing with tunable drug delivery properties for wound care. Int J Pharm 2019; 566:101-110. [DOI: 10.1016/j.ijpharm.2019.05.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/19/2019] [Accepted: 05/15/2019] [Indexed: 10/26/2022]
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45
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Yeung CT, Chan WTK, Lo WS, Law GL, Wong WT. Catalytic asymmetric oxo-Diels-Alder reactions with chiral atropisomeric biphenyl diols. Beilstein J Org Chem 2019; 15:955-962. [PMID: 31164932 PMCID: PMC6541354 DOI: 10.3762/bjoc.15.92] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/30/2019] [Indexed: 11/23/2022] Open
Abstract
New chiral atropisomeric biphenyl diols 3, 4 and 6 containing additional peripheral chiral centers with different steric bulkiness and/or electronic properties were synthesized. The X-ray crystal structure of 3 shows the formation of a supramolecular structure whereas that of 6, containing additional CF3 substituents, shows the formation of a monomeric structure. Diols 1–6 were found to be active organocatalysts in oxo-Diels–Alder reactions in which 2 recorded a 72% ee with trimethylacetaldehyde as a substrate.
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Affiliation(s)
- Chi-Tung Yeung
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, PR China.,State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wesley Ting Kwok Chan
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wai-Sum Lo
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, PR China.,State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Ga-Lai Law
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, PR China.,State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wing-Tak Wong
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, PR China.,State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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46
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Pang SY, Wong YT, Yuan S, Liu Y, Tsang MK, Yang Z, Huang H, Wong WT, Hao J. Universal Strategy for HF-Free Facile and Rapid Synthesis of Two-dimensional MXenes as Multifunctional Energy Materials. J Am Chem Soc 2019; 141:9610-9616. [PMID: 31117483 DOI: 10.1021/jacs.9b02578] [Citation(s) in RCA: 166] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Two-dimensional MXenes are promising for various energy-related applications such as energy storage devices and electrocatalysis of water-splitting. MXenes prepared from hydrofluoric (HF) acid etching have been widely reported. Nonetheless, the acute toxicity of HF acid impedes the large-scale fabrication of MXenes and their wide utilization in energy-related applications. It is thus greatly encouraging to explore a more innocuous protocol for MXenes synthesis. Thereby, a universal strategy based on thermal-assisted electrochemical etching route is developed to synthesize MXenes (e.g., Ti2CT x, Cr2CT x, and V2CT x). Furthermore, the cobalt ion doped MXenes show an exceptionally enhanced capability of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activity, demonstrating their multifunctionalities, which is comparable to the commercialized catalysts. Moreover, we successfully exploited our MXenes as cathodes for the novel aqueous rechargeable battery, with proficient retention and excellent electrical output performance. This work paves a nontoxic and HF-free route to prepare various MXenes and demonstrates practical applications of the materials.
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Affiliation(s)
- Sin-Yi Pang
- Department of Applied Physics , The Hong Kong Polytechnic University , Hong Kong , P. R. China
| | - Yuen-Ting Wong
- Department of Applied Physics , The Hong Kong Polytechnic University , Hong Kong , P. R. China
| | - Shuoguo Yuan
- Department of Applied Physics , The Hong Kong Polytechnic University , Hong Kong , P. R. China
| | - Yan Liu
- Department of Applied Physics , The Hong Kong Polytechnic University , Hong Kong , P. R. China
| | - Ming-Kiu Tsang
- Department of Applied Physics , The Hong Kong Polytechnic University , Hong Kong , P. R. China.,Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hong Kong , P. R. China
| | - Zhibin Yang
- Department of Applied Physics , The Hong Kong Polytechnic University , Hong Kong , P. R. China
| | - Haitao Huang
- Department of Applied Physics , The Hong Kong Polytechnic University , Hong Kong , P. R. China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hong Kong , P. R. China
| | - Jianhua Hao
- Department of Applied Physics , The Hong Kong Polytechnic University , Hong Kong , P. R. China
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47
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Lai WF, Lin M, Wong WT. Tackling Aging by Using miRNA as a Target and a Tool. Trends Mol Med 2019; 25:673-684. [PMID: 31126873 DOI: 10.1016/j.molmed.2019.04.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 04/12/2019] [Accepted: 04/17/2019] [Indexed: 12/15/2022]
Abstract
miRNA is a class of short noncoding RNA that regulates gene expression at the post-transcriptional level. Evidence of age-associated changes in miRNA expression has been collected in models ranging from nematodes to humans; however, there has been little discussion of how to turn our knowledge of miRNA biology into antiaging therapy. This opinion article provides a snapshot of our current understanding of the roles of miRNA in modulating the aging process. We discuss major chemical techniques for modifying the miRNA structure as well as developing delivery systems for intervention. Finally, technical needs to be met for bench-to-clinic translation of miRNA-based interventions are highlighted for future research.
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Affiliation(s)
- Wing-Fu Lai
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China; Health Science Centre, Shenzhen University, Shenzhen, China.
| | - Marie Lin
- Health Science Centre, Shenzhen University, Shenzhen, China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong Special Administrative Region, China
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48
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Dai L, Lo WS, Gu Y, Xiong Q, Wong KL, Kwok WM, Wong WT, Law GL. Breaking the 1,2-HOPO barrier with a cyclen backbone for more efficient sensitization of Eu(iii) luminescence and unprecedented two-photon excitation properties. Chem Sci 2019; 10:4550-4559. [PMID: 31123564 PMCID: PMC6498141 DOI: 10.1039/c9sc00244h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 03/27/2019] [Indexed: 11/21/2022] Open
Abstract
A cyclen backbone was utilized to study the effect of backbone rigidity on Eu(iii) luminescence sensitization using a 1,2-HOPO derivative and 2-thenoyltrifluoroacetonate (TTA) as chromophores. The restriction of molecular movement of Eu-Cy-HOPO brought about by the increased rigidity provided a tightly packed coordination environment for the octadentate Eu(iii) center which resulted in the highest overall quantum yield (30.2%) and sensitization efficiency (64.6%) among 1,2-HOPO sensitized Eu(iii) complexes. Eu-Cy-HOPO is also the first 1,2-HOPO-based lanthanide complex to emit Eu(iii) luminescence under two-photon excitation.
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Affiliation(s)
- Lixiong Dai
- The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen , PR China . ; .,State Key Laboratory of Chemical Biology and Drug Discovery , Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong SAR , PR China.,Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong SAR , PR China
| | - Wai-Sum Lo
- The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen , PR China . ; .,State Key Laboratory of Chemical Biology and Drug Discovery , Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong SAR , PR China
| | - Yanjuan Gu
- State Key Laboratory of Chemical Biology and Drug Discovery , Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong SAR , PR China
| | - Qingwu Xiong
- State Key Laboratory of Chemical Biology and Drug Discovery , Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong SAR , PR China
| | - Ka-Leung Wong
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong SAR , PR China
| | - Wai-Ming Kwok
- State Key Laboratory of Chemical Biology and Drug Discovery , Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong SAR , PR China
| | - Wing-Tak Wong
- The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen , PR China . ; .,State Key Laboratory of Chemical Biology and Drug Discovery , Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong SAR , PR China
| | - Ga-Lai Law
- The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen , PR China . ; .,State Key Laboratory of Chemical Biology and Drug Discovery , Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom , Kowloon , Hong Kong SAR , PR China
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49
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Li S, Lui KH, Tsoi TH, Lo WS, Li X, Hu X, Chi-Shing Tai W, Hiu-Ling Hung C, Gu YJ, Wong WT. pH-responsive targeted gold nanoparticles for in vivo photoacoustic imaging of tumor microenvironments. Nanoscale Adv 2019; 1:554-564. [PMID: 36132235 PMCID: PMC9473232 DOI: 10.1039/c8na00190a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/09/2018] [Indexed: 05/25/2023]
Abstract
The acidic microenvironment of tumor tissues has been proven to be a major characteristic for differentiation from normal tissues, thereby providing a desirable target for both disease diagnosis and functional imaging. We herein introduce a way to endow gold nanoparticles with aggregation behaviour induced by pH tuning. The nanoparticle surface was modified with two thiol conjugate molecules, which could smartly stabilize it at the pH of blood and normal tissues but induce aggregation in response to the acidic extracellular pH in tumor. The surface conjugate molecule composition effect was studied systematically, and at the optimal surface conjugate molecule composition, a pH-responsive active tumor-targeting c(RGDyk)-MHDA/LSC@AuNP nanoprobe was successfully obtained and showed a significantly enhanced contrast effect for both in vitro and in vivo photoacoustic (PA) imaging. Intravenous administration of our nanoprobe to U87MG tumor-bearing nude mice showed PA imaging contrasts almost 3-fold higher than those for the blocking group. Quantitative biodistribution data revealed that 9.7 μg g-1 of nanoprobe accumulated in the U87MG tumor 4 h post-injection. These findings might provide an effective strategy for developing new classes of intelligent and biocompatible contrast agents with a high efficiency for PA imaging and PA imaging-guided cancer therapy.
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Affiliation(s)
- Shiying Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - Kwok-Ho Lui
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - Tik-Hung Tsoi
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - Wai-Sum Lo
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - Xin Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - Xuesen Hu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - William Chi-Shing Tai
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - Clara Hiu-Ling Hung
- University Research Facility in Life Science, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - Yan-Juan Gu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
| | - Wing-Tak Wong
- The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057 China
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University Hung Hom Hong Kong China
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50
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Yeung CT, Chan WTK, Lo WS, Law GL, Wong WT. Synthesis of a Conformationally Stable Atropisomeric Pair of Biphenyl Scaffold Containing Additional Stereogenic Centers. Molecules 2019; 24:molecules24030643. [PMID: 30759758 PMCID: PMC6385101 DOI: 10.3390/molecules24030643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/06/2019] [Accepted: 02/08/2019] [Indexed: 11/16/2022] Open
Abstract
The synthesis of a new CF₃-containing stereogenic atropisomeric pair of ortho-disubstituted biphenyl scaffold is presented. The atropisomers are surprisingly conformationally stable for isolation. X-ray structures show that their stability comes from an intramolecular hydrogen bond formation from their two hydroxyl groups and renders the spatial arrangement of their peripheral CF₃ and CH₃ groups very different. The synthesized stereogenic scaffold proved to be effective in catalyzing the asymmetric N-nitroso aldol reaction of enamine and nitrosobenzene. Compared to similar scaffolds without CF₃ groups, one of our atropisomer exhibits an increase in enantioselectivity in this reaction.
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Affiliation(s)
- Chi-Tung Yeung
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, PR China.
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong.
| | - Wesley Ting Kwok Chan
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong.
| | - Wai-Sum Lo
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, PR China.
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong.
| | - Ga-Lai Law
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, PR China.
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong.
| | - Wing-Tak Wong
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, PR China.
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong.
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