1
|
Liu X, Gao R, Han L, Kan C, Xu J. A smartphone readout device for portable and sensitive estimation of Hg2+ via coumarin-modified paper. Talanta 2023; 252:123849. [DOI: 10.1016/j.talanta.2022.123849] [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: 06/09/2022] [Revised: 08/04/2022] [Accepted: 08/12/2022] [Indexed: 10/15/2022]
|
2
|
Gao R, Liu X, Feng J, Han L, Xu J, Kan C. Synthesis and application of a novel polyurethane nanoemulsion bearing coumarin derivative as a "turn-on" fluorescence sensor toward Hg 2. Spectrochim Acta A Mol Biomol Spectrosc 2022; 281:121612. [PMID: 35839695 DOI: 10.1016/j.saa.2022.121612] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 05/18/2022] [Revised: 06/24/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
A novel polyurethane (PU-co-HCCA) nanoemulsion bearing coumarin derivative (HCCA) was synthesized as a "turn-on" fluorescent probe and used to modify filter paper, and its sensing properties were investigated. Results showed that PU-co-HCCA nanoemulsion exhibited high selectivity and excellent sensitivity toward Hg2+ over other metal ions, and possessed excellent fluorescence quantum yields of 0.976, ppb-levels detection limits of 1.61 ppb and large Stokes shifts of 101 nm. Meanwhile, as an application example of as-prepared PU-co-HCCA nanoemulsion, a Hg2+ test paper was prepared by modifying filter paper with PU-co-HCCA nanoemulsion, and results indicated that the test paper is portable and convenient and has a wide working pH range. We believe that the PU-co-HCCA nanoemulsion and the modified filter paper can provide a new design principle for the application of fluorescence sensors for metal ions including Hg2+.
Collapse
Affiliation(s)
- Rongsheng Gao
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing 100084, China
| | - Xueyan Liu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing 100084, China
| | - Jianyan Feng
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing 100084, China
| | - Lu Han
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing 100084, China
| | - Jianhong Xu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing 100084, China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China, Tsinghua University, Beijing 100084, China.
| |
Collapse
|
3
|
Han L, Li L, Gao R, Liu X, Kan C. Functional core/shell
PMMA
/P(
MMA‐
co
‐PDSECAE
)‐
SH
particles with thiol groups in the shell and their adsorption of heavy metal ions. J Appl Polym Sci 2022. [DOI: 10.1002/app.52859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lu Han
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| | - Lingxiao Li
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| | - Rongsheng Gao
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| | - Xueyan Liu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education Tsinghua University Beijing People's Republic of China
| |
Collapse
|
4
|
Singh V, Doshi P, Kingsford P, Miklin D, Nadeswaran P, Kan C, Lee R, Wolfson A, Vaidya A, Depasquale E. Rethinking the Impact of Donor eGFR on Heart Transplant Outcomes. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1133] [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] [Indexed: 11/27/2022] Open
|
5
|
Cross R, Murphy C, Kan C. P.26 Routine use of tranexamic acid during elective caesarean section: A district general’s experience. Int J Obstet Anesth 2021. [DOI: 10.1016/j.ijoa.2021.103024] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
6
|
Zhao HD, Ma Y, Wu XS, Cheng JJ, Xia ZG, Kan C, Ding XJ, Chen WD, Zhang LZ, Wang XY, Cai Y, Wang SY. Circ_001680 aggravates the malignant process of gastric carcinoma by targeting MAP2. Eur Rev Med Pharmacol Sci 2021; 24:6072-6079. [PMID: 32572922 DOI: 10.26355/eurrev_202006_21502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This study aims to explore the expression pattern and clinical significance of circ_001680 in gastric carcinoma (GC) process. PATIENTS AND METHODS Circ_001680 levels in 40 pairs of GC and paracancerous ones were detected by quantitative real-time polymerase chain reaction (qRT-PCR). The relationship between circ_001680 and GC clinicopathological parameters was analyzed. AGS and SGC-7901 cells were used for constructing circ_001680 knockdown models by shRNA transfection. Proliferative and metastatic abilities in GC cells with circ_001680 knockdown were examined by cell counting kit-8 (CCK-8) and transwell assay, respectively. Dual-Luciferase reporter assay was conducted to clarify the interaction between circ_001680 and MAP2. Their co-regulation on GC process was detected through rescue experiments. RESULTS Circ_001680 was highly expressed in GC tissues and cell lines. High level of circ_001680 predicted high incidences of lymphatic and distant metastasis, and poor prognosis in GC patients. Knockdown of circ_001680 suppressed proliferative and metastatic abilities in AGS and SGC-7901 cells. MAP2 was the target gene binding circ_001680, which was lowly expressed in GC. In addition, MAP2 was negatively correlated to circ_001680. Knockdown of MAP2 could abolish the suppressed proliferative and metastatic abilities in GC cells with circ_001680 knockdown. CONCLUSIONS Circ_001680 is highly expressed in GC tissues and closely related to metastasis and prognosis in GC patients, which promotes the proliferative and metastatic abilities in GC cells by negatively interacting with MAP2.
Collapse
Affiliation(s)
- H-D Zhao
- Department of Emergency Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Zaremba N, Watson A, Kan C, Broadley M, Partridge H, Figuereido C, Hopkins D, Treasure J, Ismail K, Harrison A, Stadler M. Multidisciplinary healthcare teams' challenges and strategies in supporting people with type 1 diabetes to recover from disordered eating. Diabet Med 2020; 37:1992-2000. [PMID: 31833586 DOI: 10.1111/dme.14207] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/10/2019] [Indexed: 11/30/2022]
Abstract
AIM To examine the challenges healthcare teams face when treating people with type 1 diabetes and disordered eating and the strategies these teams have developed to facilitate effective treatment. METHODS Four semi-structured focus groups were conducted including two tertiary diabetes specialist teams and three tertiary eating disorders specialist teams between July and December 2018. Thematic analysis of the transcripts followed a six-phase process. RESULTS Twenty-nine experienced healthcare professionals (16 diabetes and 13 eating disorder specialists, 16±12 years' professional experience) were interviewed. The challenges identified in treating people with type 1 diabetes and disordered eating included subthemes the 'challenges specific to the healthcare professional' (feeling not competent enough and perceived emotional burden), 'challenges pertaining to patient factors' (e.g. difficulties with engaging in therapy) and 'challenges created by the healthcare system' (time pressure and staff shortage). Healthcare professionals expressed the need for a consensus on diagnosis and the definition of disordered eating in type 1 diabetes, as well as the need for training and educational resources specific to type 1 diabetes and disordered eating. Healthcare professionals gave practical examples of strategies of communication for better patient engagement and felt that multidisciplinary working in joint clinics with the other specialty were facilitators for recovery from disordered eating. CONCLUSIONS Healthcare professionals require multidisciplinary team support when treating people with type 1 diabetes and to improve their own competencies. The development of effective screening and assessment tools, educational resources and training for healthcare professionals, and developing multidisciplinary treatment pathways will be key to improving outcomes for their service users with type 1 diabetes and disordered eating.
Collapse
Affiliation(s)
- N Zaremba
- Diabetes Research Group, Weston Education Centre, King's College London, London, UK
| | - A Watson
- Division of Medicine, University College London, London, UK
| | - C Kan
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - M Broadley
- Department of Psychology, University of Southern Denmark, Odense, Denmark
| | - H Partridge
- Diabetes Centre, Royal Bournemouth and Christchurch Hospital, Bournemouth, UK
| | - C Figuereido
- Dorset Eating Disorders Service, Royal Bournemouth and Christchurch Hospital, Bournemouth, UK
| | - D Hopkins
- Institute of Diabetes Endocrinology and Obesity, King's Health Partners, London, UK
| | - J Treasure
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - K Ismail
- Institute of Diabetes Endocrinology and Obesity, King's Health Partners, London, UK
- Department of Psychological Medicine, Diabetes Psychology and Psychiatry Research Group, Weston Education Centre, King's College London, London, UK
| | - A Harrison
- Diabetes Research Group, Weston Education Centre, King's College London, London, UK
- University College London, Institute of Education, London, UK
| | - M Stadler
- Diabetes Research Group, Weston Education Centre, King's College London, London, UK
- Department of Psychological Medicine, Diabetes Psychology and Psychiatry Research Group, Weston Education Centre, King's College London, London, UK
| |
Collapse
|
8
|
Li L, Han L, Liu X, Xu J, Kan C. Thiol functionalized polymer submicron particles prepared by soap‐free emulsion polymerization and their adsorption of lead ions in water. J Appl Polym Sci 2020. [DOI: 10.1002/app.49312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lingxiao Li
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of EducationTsinghua University Beijing China
| | - Lu Han
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of EducationTsinghua University Beijing China
| | - Xueyan Liu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of EducationTsinghua University Beijing China
- The State Key Lab of Chemical Engineering, Department of Chemical EngineeringTsinghua University Beijing China
| | - Jianhong Xu
- The State Key Lab of Chemical Engineering, Department of Chemical EngineeringTsinghua University Beijing China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of EducationTsinghua University Beijing China
| |
Collapse
|
9
|
Qin H, Zhang H, Zhou X, Gu D, Li L, Kan C. Preparation and reducing-responsive property of a novel functional polyurethane nanoemulsion. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.04.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
10
|
Qin H, Zhou X, Gu D, Li L, Kan C. Preparation and Characterization of a Novel Waterborne Lambda-Cyhalothrin/Alkyd Nanoemulsion. J Agric Food Chem 2019; 67:10587-10594. [PMID: 31497957 DOI: 10.1021/acs.jafc.9b03681] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Inefficient usage and overdosage of conventional pesticide formulations has resulted in large economic losses and environmental pollution due to their poor water solubility and weak adhesion to foliage. In order to develop a green and efficient pesticide formulation, a kind of alkyd resin (AR) based on vegetable oil was first synthesized and used to fabricate the lambda-cyhalothrin/AR (LC/AR) nanoemulsion via in situ phase inverse emulsification, and its properties were then investigated. Results showed that the particle size of the LC/AR nanoemulsion was 50-150 nm with maximum LC loading capacity of as much as 40.9 wt %, high encapsulation efficiency >90%, and great stability in multiple environments. The LC/AR nanoemulsion exhibited better controlled release characteristics compared with LC commercial formulations, and a stronger adhesion on the foliage of the resulted nanoemulsion was also observed, which was attributed to low surface tension and strong interactions with foliar surfaces.
Collapse
Affiliation(s)
- He Qin
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China , Tsinghua University , Beijing 100084 , China
| | - Xiaoteng Zhou
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China , Tsinghua University , Beijing 100084 , China
| | - Danfei Gu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China , Tsinghua University , Beijing 100084 , China
| | - Lingxiao Li
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China , Tsinghua University , Beijing 100084 , China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China , Tsinghua University , Beijing 100084 , China
| |
Collapse
|
11
|
Vargas G, Bouchet M, Bouazza L, Reboul P, Boyault C, Gervais M, Kan C, Benetollo C, Brevet M, Croset M, Mazel M, Cayrefourcq L, Geraci S, Vacher S, Pantano F, Filipits M, Driouch K, Bieche I, Gnant M, Jacot W, Aubin JE, Duterque-Coquillaud M, Alix-Panabières C, Clézardin P, Bonnelye E. ERRα promotes breast cancer cell dissemination to bone by increasing RANK expression in primary breast tumors. Oncogene 2019; 38:950-964. [PMID: 30478447 DOI: 10.1038/s41388-018-0579-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 10/20/2018] [Indexed: 02/07/2023]
Abstract
Bone is the most common metastatic site for breast cancer. Estrogen-related-receptor alpha (ERRα) has been implicated in cancer cell invasiveness. Here, we established that ERRα promotes spontaneous metastatic dissemination of breast cancer cells from primary mammary tumors to the skeleton. We carried out cohort studies, pharmacological inhibition, gain-of-function analyses in vivo and cellular and molecular studies in vitro to identify new biomarkers in breast cancer metastases. Meta-analysis of human primary breast tumors revealed that high ERRα expression levels were associated with bone but not lung metastases. ERRα expression was also detected in circulating tumor cells from metastatic breast cancer patients. ERRα overexpression in murine 4T1 breast cancer cells promoted spontaneous bone micro-metastases formation when tumor cells were inoculated orthotopically, whereas lung metastases occurred irrespective of ERRα expression level. In vivo, Rank was identified as a target for ERRα. That was confirmed in vitro in Rankl stimulated tumor cell invasion, in mTOR/pS6K phosphorylation, by transactivation assay, ChIP and bioinformatics analyses. Moreover, pharmacological inhibition of ERRα reduced primary tumor growth, bone micro-metastases formation and Rank expression in vitro and in vivo. Transcriptomic studies and meta-analysis confirmed a positive association between metastases and ERRα/RANK in breast cancer patients and also revealed a positive correlation between ERRα and BRCA1mut carriers. Taken together, our results reveal a novel ERRα/RANK axis by which ERRα in primary breast cancer promotes early dissemination of cancer cells to bone. These findings suggest that ERRα may be a useful therapeutic target to prevent bone metastases.
Collapse
Affiliation(s)
- G Vargas
- INSERM-UMR1033, Lyon, France
- University of Lyon1, Lyon, France
| | - M Bouchet
- INSERM-UMR1033, Lyon, France
- University of Lyon1, Lyon, France
- IGFL, Lyon, France
| | - L Bouazza
- INSERM-UMR1033, Lyon, France
- University of Lyon1, Lyon, France
| | - P Reboul
- UMR7365-CNRS-Université de Lorraine, Nancy, France
| | - C Boyault
- Institute for Advanced Biosciences, Grenoble, France
| | - M Gervais
- INSERM-UMR1033, Lyon, France
- University of Lyon1, Lyon, France
| | - C Kan
- INSERM-UMR1033, Lyon, France
- University of Lyon1, Lyon, France
- Center for Cancer Research, University of Sydney, Sydney, Australia
| | - C Benetollo
- University of Lyon1, Lyon, France
- INSERM-U1028-CNRS-UMR5292, Lyon, France
| | - M Brevet
- INSERM-UMR1033, Lyon, France
- Centre de Biologie et de Pathologie Est, Bron, France
| | - M Croset
- INSERM-UMR1033, Lyon, France
- University of Lyon1, Lyon, France
| | - M Mazel
- EA2415-Institut Universitaire de Recherche Clinique, Montpellier, France
| | - L Cayrefourcq
- EA2415-Institut Universitaire de Recherche Clinique, Montpellier, France
| | - S Geraci
- INSERM-UMR1033, Lyon, France
- University of Lyon1, Lyon, France
| | - S Vacher
- Department of Genetics, Institut-Curie, Paris, France
| | - F Pantano
- University-Campus-Bio-Medico, Rome, 00128, Italy
| | - M Filipits
- Department of Surgery and Comprehensive Cancer Center, Medical-University of Vienna, Vienna, Austria
| | - K Driouch
- Department of Genetics, Institut-Curie, Paris, France
| | - I Bieche
- Department of Genetics, Institut-Curie, Paris, France
| | - M Gnant
- Department of Surgery and Comprehensive Cancer Center, Medical-University of Vienna, Vienna, Austria
| | - W Jacot
- Montpellier Cancer Institute, Montpellier, France
| | - J E Aubin
- University of Toronto, Toronto, Canada
| | | | - C Alix-Panabières
- EA2415-Institut Universitaire de Recherche Clinique, Montpellier, France
| | - P Clézardin
- INSERM-UMR1033, Lyon, France
- University of Lyon1, Lyon, France
| | - E Bonnelye
- INSERM-UMR1033, Lyon, France.
- University of Lyon1, Lyon, France.
| |
Collapse
|
12
|
Zhang H, Qin H, Li L, Zhou X, Wang W, Kan C. Preparation and Characterization of Controlled-Release Avermectin/Castor Oil-Based Polyurethane Nanoemulsions. J Agric Food Chem 2018; 66:6552-6560. [PMID: 28562041 DOI: 10.1021/acs.jafc.7b01401] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Avermectin (AVM) is a low-toxic and high-active biopesticide, but it can be easily degraded by UV light. In this paper, biodegradable castor oil-based polyurethanes (CO-PU) are synthesized and used as carriers to fabricate a new kind of AVM/CO-PU nanoemulsion through an emulsion solvent evaporation method, and the chemical structure, colloidal property, AVM loading capacity, controlled-release behavior, foliar adhesion, and photostability of the AVM/CO-PU drug delivery systems are investigated. Results show that AVM is physically encapsulated in the CO-PU carrier nanospheres, the diameter of the AVM/CO-PU nanoparticles is <50 nm, and the AVM/CO-PU films are flat and smooth without any AVM aggregate. The drug loading capacity is up to 42.3 wt % with a high encapsulation efficiency of >85%. The release profiles indicate that the release rate is relatively high at the early stage and then slows, which can be adjusted by loaded AVM content, temperature, and pH of the release medium. The foliar pesticide retention of the AVM/CO-PU nanoemulsions is improved, and the photolysis rate of AVM in the AVM/CO-PU nanoparticles is significantly slower than that of the free AVM. A release mechanism of the AVM/CO-PU nanoemulsions is proposed, which is controlled by both diffusion and matrix erosion.
Collapse
Affiliation(s)
- Hong Zhang
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - He Qin
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Lingxiao Li
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Xiaoteng Zhou
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Wei Wang
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| |
Collapse
|
13
|
Zhou X, Li L, Qin H, Ning B, Li J, Kan C. Controlled self-assembly into diverse stimuli-responsive microstructures: from microspheres to branched cylindrical micelles and vesicles. RSC Adv 2018; 8:21613-21620. [PMID: 35539922 PMCID: PMC9080933 DOI: 10.1039/c8ra03374a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 04/19/2018] [Accepted: 06/03/2018] [Indexed: 11/22/2022] Open
Abstract
A series of amphiphilic PDMAEMA–SS–PCL chains with variable ratios of hydrophilic poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) to hydrophobic poly(ε-caprolactone) (PCL) were prepared via ring-opening polymerization, in which the two different moieties were linked via a disulfide bond with reduction responsiveness. After cross-linking by the photodegradable o-nitrobenzyl linkage, the amphiphilic chains could self-assemble into microspheres, branched cylindrical micelles and vesicles, which were responsive to the reduction agent dl-dithiothreitol and UV light irradiation through different mechanisms. A series of cross-linked amphiphilic PDMAEMA–SS–PCL were prepared, which could self-assemble into diverse microstructures with reduction and light responsiveness.![]()
Collapse
Affiliation(s)
- Xiaoteng Zhou
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University Beijing 100084 People's Republic of China
| | - Lingxiao Li
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University Beijing 100084 People's Republic of China
| | - He Qin
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University Beijing 100084 People's Republic of China
| | - Bo Ning
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University Beijing 100084 People's Republic of China
| | - Junpei Li
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University Beijing 100084 People's Republic of China
| | - Chengyou Kan
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University Beijing 100084 People's Republic of China
| |
Collapse
|
14
|
Hu Y, Wang L, Shen J, Jiang G, Kan C. Preparation and characterization of porous cationic poly[styrene-co
-(N
,N
′-dimethylaminoethyl methacrylate)] nanoparticles and their adsorption of heavy metal ions in water. POLYM INT 2018. [DOI: 10.1002/pi.5541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yang Hu
- Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing PR China
| | - Lihui Wang
- Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing PR China
| | - Jie Shen
- Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing PR China
| | - Guoqiang Jiang
- Key Laboratory of Industrial Biocatalysis of Ministry of Education; Tsinghua University; Beijing PR China
| | - Chengyou Kan
- Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing PR China
| |
Collapse
|
15
|
Macdonald P, Kan C, Stadler M, De Bernier GL, Hadjimichalis A, Le Coguic AS, Allan J, Ismail K, Treasure J. Eating disorders in people with Type 1 diabetes: experiential perspectives of both clients and healthcare professionals. Diabet Med 2018; 35:223-231. [PMID: 29178332 DOI: 10.1111/dme.13555] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/20/2017] [Indexed: 01/27/2023]
Abstract
AIMS To explore the experiential perspective of people with Type 1 diabetes mellitus and eating disorders and that of the healthcare professionals treating them, and to understand the experience of both sides to inform future development of healthcare services. METHODS Participants were recruited from Diabetics with Eating Disorders (a national UK charity), and through professional networks. Nine partially/fully recovered individuals with Type 1 diabetes and eating disorders and eight healthcare professionals participated in semi-structured interviews carried out by medically trained researchers. Data were transcribed and coded using a six-stage framework of thematic analysis. RESULTS Four superordinate themes and several subordinate themes emerged from the Type 1 diabetes and eating disorders dataset: (1) perceptions surrounding service provision; (2) reflections on the recovery process; (3) the experiential perspective of living with Type 1 diabetes and an eating disorder; and (4) support mechanisms. Healthcare professional data elicited three superordinate themes and several subordinate themes: (1) service provision; (2) personal insight and reflection of professional role; and (3) challenges of working with dual diagnoses. CONCLUSION People with Type 1 diabetes and eating disorders and their healthcare professionals provided insight into healthcare services from the patient and care delivery perspectives. There was general agreement from both groups that a multidisciplinary, collaborative (family inclusive), clinical approach to treatment is important, as well as adequate training opportunities for service providers. These findings may help to inform development strategies for multidisciplinary care approaches to Type 1 diabetes complicated by eating disorders.
Collapse
Affiliation(s)
- P Macdonald
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - C Kan
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - M Stadler
- King's College London, Diabetes Research Group, London, UK
| | - G L De Bernier
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - A Hadjimichalis
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - A-S Le Coguic
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - J Allan
- Birkbeck, University of London, London, UK
| | - K Ismail
- Diabetes Department, King's College Hospital, London, UK
| | - J Treasure
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| |
Collapse
|
16
|
Abstract
Matching the nutrient release rate of coated fertilizer with the nutrient uptake rate of the crop is the best way to increase the utilization efficiency of nutrients and reduce environmental pollution from the fertilizer. The diffusion property and mechanism of nutrients through the film are the theoretical basis for the product pattern design of coated fertilizers. For the coated fertilizer with a single-component nutrient, an extended solution-diffusion model was used to describe the difference of nutrient release rate, and the release rate is proportional to the permeation coefficient and the solubility of the nutrient. For the double- and triple-component fertilizer of N-K, N-P, and N-P-K, because of the interaction among nutrient molecules and ions, the release rates of different nutrients were significantly affected by the components in the composite fertilizer. Coating the single-component fertilizer (i.e., nitrogen fertilizer, phosphate fertilizer, and potash fertilizer) first and subsequently bulk blending is expected to be a promising way to adjust flexibly the nutrient release rate to meet the nutrient uptake rate of the crop.
Collapse
Affiliation(s)
- Di An
- Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
| | - Ling Yang
- Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
| | - Boyang Liu
- Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
| | - Ting-Jie Wang
- Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
| | - Chengyou Kan
- Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
| |
Collapse
|
17
|
Clery P, Stahl D, Ismail K, Treasure J, Kan C. Systematic review and meta-analysis of the efficacy of interventions for people with Type 1 diabetes mellitus and disordered eating. Diabet Med 2017; 34:1667-1675. [PMID: 28887815 DOI: 10.1111/dme.13509] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/01/2017] [Indexed: 01/07/2023]
Abstract
AIM To examine the types of interventions currently available for people with Type 1 diabetes mellitus and their effectiveness. BACKGROUND The prevalence of disordered eating in people with Type 1 diabetes mellitus is twice that in their counterparts without diabetes, and is associated with worse biomedical outcomes and greater mortality. METHODS Medline, Embase, PsycINFO, the Cochrane Library, PubMed and OpenGrey databases were searched up to August 2016 to identify studies on interventions in people with Type 1 diabetes-associated disordered eating. For the systematic review, intervention components were identified and their effectiveness was examined. For the meta-analysis, the pooled effect sizes of glycaemic control (HbA1c ) between pre- and post-treatment in treatment and comparison groups were calculated using a random effects model. RESULTS Of 91 abstracts reviewed, six studies met the inclusion criteria, of which three had appropriate data for the meta-analysis (n = 118). The pooled effect size was -0.21 95% CI (-0.58 to 0.16; where negative values represent an improvement in HbA1c levels), indicating no statistically significant improvement in the treatment group compared with comparison group. Inpatient therapy appeared to be the most effective treatment, and this had multiple components including cognitive behavioural therapy, psychoeducation and family therapy. CONCLUSION Limited or no improvement in glycaemic control and disordered eating symptoms was observed in people with Type 1 diabetes-associated disordered eating who were receiving currently available interventions. The present review suggests that developing an intensive intervention with a joint focus on both disordered eating and diabetes management is needed for this complex patient group.
Collapse
Affiliation(s)
- P Clery
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - D Stahl
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - K Ismail
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - J Treasure
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - C Kan
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| |
Collapse
|
18
|
Ter Huurne N, Lozano-Soldevilla D, Onnink M, Kan C, Buitelaar J, Jensen O. Diminished modulation of preparatory sensorimotor mu rhythm predicts attention-deficit/hyperactivity disorder severity. Psychol Med 2017; 47:1947-1956. [PMID: 28290271 DOI: 10.1017/s0033291717000332] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) is characterized by problems in regulating attention and in suppressing disruptive motor activity, i.e. hyperactivity and impulsivity. We recently found evidence that aberrant distribution of posterior α band oscillations (8-12 Hz) is associated with attentional problems in ADHD. The sensorimotor cortex also produces strong 8-12 Hz band oscillations, namely the μ rhythm, and is thought to have a similar inhibitory function. Here, we now investigate whether problems in distributing α band oscillations in ADHD generalize to the μ rhythm in the sensorimotor domain. METHOD In a group of adult ADHD (n = 17) and healthy control subjects (n = 18; aged 21-40 years) oscillatory brain activity was recorded using magnetoencephalography during a visuo-spatial attention task. Subjects had to anticipate a target with unpredictable timing and respond by pressing a button. RESULTS Preparing a motor response, the ADHD group failed to increase hemispheric μ lateralization with relatively higher μ power in sensorimotor regions not engaged in the task, as the controls did (F 1,33 = 8.70, p = 0.006). Moreover, the ADHD group pre-response μ lateralization not only correlated positively with accuracy (r s = 0.64, p = 0.0052) and negatively with intra-individual reaction time variability (r s = -0.52, p = 0.033), but it also correlated negatively with the score on an ADHD rating scale (r s = -0.53, p = 0.028). CONCLUSIONS We suggest that ADHD is associated with an inability to sufficiently inhibit task-irrelevant sensorimotor areas by means of modulating μ oscillatory activity. This could explain disruptive motor activity in ADHD. These results provide further evidence that impaired modulation of α band oscillations is involved in the pathogenesis of ADHD.
Collapse
Affiliation(s)
- N Ter Huurne
- Karakter Child and Adolescent Psychiatry University Centre,Nijmegen,The Netherlands
| | - D Lozano-Soldevilla
- Donders Institute for Brain,Cognition and Behaviour,Radboud University,Nijmegen,The Netherlands
| | - M Onnink
- Department of Human Genetics,Radboudumc,Nijmegen,The Netherlands
| | - C Kan
- Department of Psychiatry,Radboudumc,Nijmegen,The Netherlands
| | - J Buitelaar
- Karakter Child and Adolescent Psychiatry University Centre,Nijmegen,The Netherlands
| | - O Jensen
- Centre for Human Brain Health,School of Psychology,University of Birmingham,Birmingham,UK
| |
Collapse
|
19
|
Affiliation(s)
- Ling Yang
- Tsinghua University; Department of Chemical Engineering; 100084 Beijing China
| | - Di An
- Tsinghua University; Department of Chemical Engineering; 100084 Beijing China
| | - Ting-Jie Wang
- Tsinghua University; Department of Chemical Engineering; 100084 Beijing China
| | - Chengyou Kan
- Tsinghua University; Department of Chemical Engineering; 100084 Beijing China
| | - Yong Jin
- Tsinghua University; Department of Chemical Engineering; 100084 Beijing China
| |
Collapse
|
20
|
Hu Y, Yu C, Zhang H, Wang J, Jiang G, Kan C. pH-Triggered Drug Release of Monodispersed P(St-co-DMAEMA) Nanoparticles: Effects of Swelling, Polymer Chain Flexibility and Drug-Polymer Interactions. J Nanosci Nanotechnol 2017; 17:900-907. [PMID: 29671471 DOI: 10.1166/jnn.2017.12691] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Monodispersed pH-sensitive poly(styrene-co-N,N′-dimethylaminoethyl methacrylate) (P(St-co- DMAEMA)) nanoparticles (NPs) were synthesized by emulsion polymerization for use in potential applications in targeted drug delivery to the tumor microenvironment. pH-Sensitive volume swelling and drug release of the NPs with varied St/DMAEMA molar ratios, crosslinking degrees and model drug coumarin-6 loading were explored in vitro to elucidate the pH-sensitive drug release mechanisms. The swelling of the NPs, which accounts for the electrostatic repulsion of protonated tertiary amine groups under acidic conditions, reaches maximum at low pH, low crosslinking density and high DMAEMA content. The NPs undergo a pH-triggered drug release, and under the condition of pH 5 and pH 2, the average release rate during 24 h is 1.5-fold and 3-fold higher than that at physiological pH, respectively. The pH-triggered drug release is related to pH-sensitive swelling, polymer chain flexibility and drug-polymer interaction, and is significantly impacted by the St/DMAEMA molar ratio, degree of crosslinking and drug loading.
Collapse
|
21
|
Abstract
A new lambda-cyhalothrin/castor oil-based polyurethane formulation with controlled-release behavior and good foliage adhesion properties is prepared.
Collapse
Affiliation(s)
- He Qin
- Department of Chemical Engineering
- Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Hong Zhang
- Department of Chemical Engineering
- Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Lingxiao Li
- Department of Chemical Engineering
- Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Xiaoteng Zhou
- Department of Chemical Engineering
- Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Junpei Li
- Department of Chemical Engineering
- Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Chengyou Kan
- Department of Chemical Engineering
- Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| |
Collapse
|
22
|
Jin Q, Li B, Zhang H, Li L, Shen J, Kan C. Investigation of covalently colored polyurethane latexes based on novel anthraquinone polyurethane chain extenders. Journal of Macromolecular Science, Part A 2016. [DOI: 10.1080/10601325.2017.1250317] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
23
|
Affiliation(s)
- C Kan
- Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience
| | - S J Kaar
- General Adult Psychiatry, South London and Maudsley NHS Foundation Trust
| | - M Eisa
- General Adult Psychiatry, Barnet, Enfield and Haringey NHS Trust
| | - L Jones
- General Adult Psychiatry, South London and Maudsley NHS Foundation Trust
| | - J Beckett
- General Adult Psychiatry, South London and Maudsley NHS Foundation Trust
| | - O Mustafa
- Department of Diabetes, King's College Hospital, King's Health Partners, London, UK
| | - K Ismail
- Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience
- Department of Diabetes, King's College Hospital, King's Health Partners, London, UK
| |
Collapse
|
24
|
Hu Y, Lin R, Zhang P, Fern J, Cheetham AG, Patel K, Schulman R, Kan C, Cui H. Electrostatic-Driven Lamination and Untwisting of β-Sheet Assemblies. ACS Nano 2016; 10:880-888. [PMID: 26646791 DOI: 10.1021/acsnano.5b06011] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Peptides or peptide conjugates capable of assembling into one-dimensional (1D) nanostructures have been extensively investigated over the past two decades due to their implications in human diseases and also their interesting applications as biomaterials. While many of these filamentous assemblies contain a β-sheet-forming sequence as the key design element, their eventual morphology could assume a variety of shapes, such as fibrils, ribbons, belts, or cylinders. Deciphering the key factors that govern the stacking fashion of individual β-sheets will help understand the polymorphism of peptide assemblies and greatly benefit the development of functional materials from customized molecular design. Herein, we report the decisive role of electrostatic interactions in the lamination and untwisting of 1D assemblies of short peptides. We designed and synthesized three short peptides containing only six amino acids (EFFFFE, KFFFFK, and EFFFFK) to elucidate the effective control of β-sheet stacking. Our results clearly suggest that electrostatic repulsions between terminal charges reduce the pitch of the twisting β-sheet tapes, thus leading to highly twisted, intertwined fibrils or twisted ribbons, whereas reducing this repulsion, either through molecular design of peptide with opposite terminal charges or through coassembly of two peptides carrying opposite charges, results in formation of infinite assemblies such as belt-like morphologies. We believe these observations provide important insight into the generic design of β-sheet assemblies.
Collapse
Affiliation(s)
- Yang Hu
- Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
| | | | | | | | | | - Kunal Patel
- Department of Biomedical Engineering, Johns Hopkins University , Baltimore, Maryland 21218, United States
| | | | - Chengyou Kan
- Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
| | - Honggang Cui
- Department of Oncology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine , Baltimore, Maryland 21205, United States
| |
Collapse
|
25
|
Hu Y, Shen B, Li B, Xu M, Jiang G, Kan C. Preparation and properties of a novel polymerizable amphiphilic anthraquinone derivative and its cationic colored copolymer latexes. RSC Adv 2016. [DOI: 10.1039/c6ra02326f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polymerizable amphiphilic dye was synthesized and used to prepare colored copolymer latexes. The amphiphilic structure overcomes the solubility limitation, dye conversion and color depth. The covalently colored film has enhanced light fastness.
Collapse
Affiliation(s)
- Yang Hu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Boyuan Shen
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Botian Li
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Min Xu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| | - Guoqiang Jiang
- Department of Chemical Engineering
- Key Laboratory of Industrial Biocatalysis of Ministry of Education
- Tsinghua University
- Beijing 100084
- China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084
- China
| |
Collapse
|
26
|
Treasure J, Kan C, Stephenson L, Warren E, Smith E, Heller S, Ismail K. Developing a theoretical maintenance model for disordered eating in Type 1 diabetes. Diabet Med 2015; 32:1541-5. [PMID: 26104138 DOI: 10.1111/dme.12839] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/19/2015] [Indexed: 01/06/2023]
Abstract
BACKGROUND According to the literature, eating disorders are an increasing problem for more than a quarter of people with Type 1 diabetes and they are associated with accentuated diabetic complications. The clinical outcomes in this group when given standard eating disorder treatments are disappointing. The Medical Research Council guidelines for developing complex interventions suggest that the first step is to develop a theoretical model. AIM To review existing literature to build a theoretical maintenance model for disordered eating in people with Type 1 diabetes. METHOD The literature in diabetes relating to models of eating disorder (Fairburn's transdiagnostic model and the dual pathway model) and food addiction was examined and assimilated. RESULTS The elements common to all eating disorder models include weight/shape concern and problems with mood regulation. The predisposing traits of perfectionism, low self-esteem and low body esteem and the interpersonal difficulties from the transdiagnostic model are also relevant to diabetes. The differences include the use of insulin mismanagement to compensate for breaking eating rules and the consequential wide variations in plasma glucose that may predispose to 'food addiction'. Eating disorder symptoms elicit emotionally driven reactions and behaviours from others close to the individual affected and these are accentuated in the context of diabetes. CONCLUSION The next stage is to test the assumptions within the maintenance model with experimental medicine studies to facilitate the development of new technologies aimed at increasing inhibitory processes and moderating environmental triggers.
Collapse
Affiliation(s)
- J Treasure
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London
- Psychiatry Department, South London and Maudsley NHS Foundation Trust, London
| | - C Kan
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London
- Psychiatry Department, South London and Maudsley NHS Foundation Trust, London
| | - L Stephenson
- Psychiatry Department, South London and Maudsley NHS Foundation Trust, London
| | - E Warren
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London
| | - E Smith
- Diabetes Department, King's College Hospital, London
| | - S Heller
- Diabetes Department, University of Sheffield, Sheffield, UK
| | - K Ismail
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London
- Psychiatry Department, South London and Maudsley NHS Foundation Trust, London
- Diabetes Department, King's College Hospital, London
| |
Collapse
|
27
|
Kan C, Patel R, Biswas T. Distribution of Newly Diagnosed Breast Cancers by Subtype and Race Using the SEER Database. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.605] [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] [Indexed: 11/16/2022]
|
28
|
Kan C, Silverman P, Patel R, Lyons J. Risk of Radiation Pneumonitis in Node Positive Breast Cancer Patients Treated With Concurrent Paclitaxel. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.604] [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] [Indexed: 10/22/2022]
|
29
|
Huang X, Li L, Xu M, Xu J, Jiang Y, Kan C. Self film-forming and opaque hollow latexes fabricated via seeded emulsion polymerization followed by alkali post-treatment. J Appl Polym Sci 2015. [DOI: 10.1002/app.42541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xinyi Huang
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing 100084 People's Republic of China
| | - Lingxiao Li
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing 100084 People's Republic of China
| | - Min Xu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing 100084 People's Republic of China
| | - Jing Xu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing 100084 People's Republic of China
| | - Yiming Jiang
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing 100084 People's Republic of China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education; Tsinghua University; Beijing 100084 People's Republic of China
| |
Collapse
|
30
|
Wang J, Li B, Jin Q, Huang X, Shen J, Kan C. Preparation of covalently colored polymer latex through miniemulsion polymerization based on a polymerizable dye. Des Monomers Polym 2015. [DOI: 10.1080/15685551.2015.1045228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- Jishuai Wang
- Department of Chemical Engineering and Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, P.R. China
| | - Botian Li
- Department of Chemical Engineering and Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, P.R. China
| | - Qingjun Jin
- Department of Chemical Engineering and Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, P.R. China
| | - Xinyi Huang
- Department of Chemical Engineering and Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, P.R. China
| | - Jie Shen
- Department of Chemical Engineering and Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, P.R. China
| | - Chengyou Kan
- Department of Chemical Engineering and Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, P.R. China
| |
Collapse
|
31
|
Kan C, Pedersen N, MacCabe J, Ismail K, Rijsdijk F. The Genetic Overlap of Type 2 Diabetes and Depression – Finding From the Swedish Twin Registry. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)30235-2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
32
|
Hou Z, Xia Y, Qu W, Kan C. Preparation and Properties of Thermoplastic Expandable Microspheres With P(VDC-AN-MMA) Shell by Suspension Polymerization. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2014.958831] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
33
|
Vilela D, Orozco J, Cheng G, Sattayasamitsathit S, Galarnyk M, Kan C, Wang J, Escarpa A. Multiplexed immunoassay based on micromotors and microscale tags. Lab Chip 2014; 14:3505-3509. [PMID: 25017813 DOI: 10.1039/c4lc00596a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This work reports on the coupling of antibody-functionalized micromotors and microwire-tagged proteins for rapid and multiplexed immunoassays. While micromotor-induced mixing accelerates the immunoreaction, tagging the proteins with microscopic particles of different sizes and shapes allows for their multiplexed discrimination, alerting of the presence of a biological threat.
Collapse
Affiliation(s)
- D Vilela
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, USA
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Hu Y, Wang J, Zhang H, Jiang G, Kan C. Synthesis and characterization of monodispersed P(St-co-DMAEMA) nanoparticles as pH-sensitive drug delivery system. Mater Sci Eng C Mater Biol Appl 2014; 45:1-7. [PMID: 25491794 DOI: 10.1016/j.msec.2014.08.061] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [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: 03/20/2014] [Revised: 07/29/2014] [Accepted: 08/29/2014] [Indexed: 11/17/2022]
Abstract
Monodispersed poly(styrene-co-N,N'-dimethylaminoethyl methacrylate) nanoparticles (P(St-co-DMAEMA) NPs) were synthesized by emulsion polymerization. Zeta potential, volume swelling ratio and in vitro release of fluorescer coumarin-6 from the NPs were determined in buffer of various pH. With an optimized formulation, the diameter of NPs is 100 nm approximately and the polydispersity index (PI) is less than 0.1. The NPs have a hydrophilic surface and alterable surface charge which is almost neutral at normal physiological pH, but becomes much more positive under acidic conditions. The volume swelling ratios and in vitro release of coumarin-6 are highly dependent on pH, which are significantly increased at the lower pH and higher DMAEMA/St molar ratio. More than 70% of the loaded coumarin-6 could be released in 24 h at pH2, which is 2.3-folds higher than that at normal physiological pH. The P(St-co-DMAEMA) NPs show promising applications to targeted drug delivery to tumors.
Collapse
Affiliation(s)
- Yang Hu
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, PR China
| | - Jishuai Wang
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, PR China
| | - Hong Zhang
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, PR China
| | - Guoqiang Jiang
- Department of Chemical Engineering, Key Laboratory of Industrial Biocatalysis of Ministry of Education, Tsinghua University, Beijing 100084, PR China.
| | - Chengyou Kan
- Department of Chemical Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, PR China.
| |
Collapse
|
35
|
Hu Y, Wang J, Cheng G, Shen J, Kan C. Fabrication and Characterization of Sulfonate-containing Polystyrene/CaCO3Core-shell Nanoparticles. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
36
|
Cheng G, Huang X, Zhang H, Hu Y, Kan C. Preparation of P(St-co-MAA)/CeO2 composite microspheres via surface carboxyl oxidation followed by in situ chemical deposition of CeO2 and their catalytic application on oxidative degradation of methyl orange. RSC Adv 2014. [DOI: 10.1039/c4ra01360c] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
P(St-co-MAA)/CeO2 composites microspheres were fabricated by a novel and facile approach, exhibiting excellent catalytic performance in oxidative degradation.
Collapse
Affiliation(s)
- Guanzhi Cheng
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084, China
| | - Xinyi Huang
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084, China
| | - Hong Zhang
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084, China
| | - Yang Hu
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084, China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China
- Tsinghua University
- Beijing 100084, China
| |
Collapse
|
37
|
Orozco J, Cheng G, Vilela D, Sattayasamitsathit S, Vazquez-Duhalt R, Valdés-Ramírez G, Pak OS, Escarpa A, Kan C, Wang J. Micromotor-Based High-Yielding Fast Oxidative Detoxification of Chemical Threats. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201308072] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
38
|
Orozco J, Cheng G, Vilela D, Sattayasamitsathit S, Vazquez-Duhalt R, Valdés-Ramírez G, Pak OS, Escarpa A, Kan C, Wang J. Micromotor-Based High-Yielding Fast Oxidative Detoxification of Chemical Threats. Angew Chem Int Ed Engl 2013; 52:13276-9. [DOI: 10.1002/anie.201308072] [Citation(s) in RCA: 156] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Indexed: 11/11/2022]
|
39
|
Kan C, Agrawal S, Traughber B, Kaminsky D, Colussi V, Podder T, Fu P, Ponsky L, Faulhaber P, Ellis R. A Single Institution Experience With Prostate Interstitial Brachytherapy (1999-2009): Biochemical Outcomes With and Without Molecular Image Guided Dose Escalation. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.976] [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] [Indexed: 10/26/2022]
|
40
|
Ellis R, Traughber B, Kaminsky D, Kan C, Shen Z, Pirozzi S, Piper J, Nelson D, Nelson A. SU-E-J-102: Evaluation of a Free-Form Intensity Based Deformable Contouring Method for Prostate Image-Guided Adaptive Radiation Therapy (IGART): Multiple Observer Comparison. Med Phys 2013. [DOI: 10.1118/1.4814314] [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] [Indexed: 11/07/2022] Open
|
41
|
Lan R, Wang G, Yang L, Wang TJ, Kan C, Jin Y. Prediction of Release Characteristics of Film-Coated Urea from Structure Characterization Data of the Film. Chem Eng Technol 2013. [DOI: 10.1002/ceat.201200459] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
42
|
Li B, Shen J, Jiang Y, Wang J, Kan C. Preparation and properties of covalently colored polymer latex based on a new anthraquinone monomer. J Appl Polym Sci 2012. [DOI: 10.1002/app.38848] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
43
|
Greskovich J, Machtay M, Dill S, Kan C, Fu P, Jiang Y, Dowlati A, Ellis R. Improved 4-year Overall and Local Failure-free Survival in Stage IIIA Non-small Cell Lung Cancer After High-dose, 3D Conformal RT (3DCRT) ± Chemotherapy (CT) - A Single Institution Experience. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1616] [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] [Indexed: 11/16/2022]
|
44
|
|
45
|
Kan C, Hahn M, Cowley M, Kaplan W, Howell V, Marsh D. 517 Genomic Instability is a Hallmark Feature of Serous Epithelial Ovarian Cancer and May Contribute to MicroRNA Dysregulation. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71179-6] [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] [Indexed: 11/29/2022]
|
46
|
Liaw C, Lim A, Koh W, Loh J, Kan C, Chan K, Ting P, Ng S, Chew S, Dua A, Tan C, Gao Q, Ho H, lee V, Tan B. Epidemiology of the four human coronaviruses 229E, HKU1, NL63 and OC43 detected over 30 months in the Singapore military. Int J Infect Dis 2012; 16. [PMCID: PMC7173272 DOI: 10.1016/j.ijid.2012.05.305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- C.W.J. Liaw
- DSO NATIONAL LABORATORIES, Singapore, Singapore,Corresponding author
| | - A.S.E. Lim
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - W.H.V. Koh
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - J.P. Loh
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - C. Kan
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - K.W. Chan
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - P.J. Ting
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - S.H. Ng
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - S.W.J. Chew
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - A. Dua
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| | - C.H. Tan
- Ministry of Defence, Singapore, Singapore
| | - Q.H.C. Gao
- Ministry of Defence, Singapore, Singapore
| | - H.P.V. Ho
- Ministry of Defence, Singapore, Singapore
| | - V. lee
- Ministry of Defence, Singapore, Singapore
| | - B.H. Tan
- DSO NATIONAL LABORATORIES, Singapore, Singapore
| |
Collapse
|
47
|
Deng W, Ji W, Jiang Y, Kan C. Influence of unsaturated acid monomer on the morphology of latex particles in the preparation of hollow latex via the alkali post-treatment. J Appl Polym Sci 2012. [DOI: 10.1002/app.37840] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
48
|
Kang K, Kan C, Du Y, Liu D, Yeung A. Immobilization of aminoglycosidic aminocyclitols antibiotic onto soap-free poly(MMA-EA-AA) latex particles. Journal of Biomaterials Science, Polymer Edition 2012; 17:91-101. [PMID: 16411601 DOI: 10.1163/156856206774879081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Monodispersed soap-free poly(MMA-EA-AA) latex particles with surface carboxyl groups were synthesized by emulsion polymerization of methyl methacrylate (MMA), ethyl acrylate (EA) and acrylic acid (AA) in aqueous medium, and streptomycin sulfate (SMS) was immobilized onto these particles using three different methods. A model experiment was designed to test the feasibility of the reaction between the carboxyl groups of polymer and the amino groups of the medicine. The covalent coupling between the latex particles and the medicine was confirmed by XPS. Results showed that the medicine molecules were located on the particle surface after immobilization, and the coupling efficiency of SMS in pre-adsorption method was higher than that in direct method. The highest coupling efficiency of this medicine was achieved using the spacer-arm method. It was demonstrated that the immobilized medicine had similar antimicrobial activity as the free form using Escherichia coli as an evaluating organism.
Collapse
Affiliation(s)
- Kai Kang
- Department of Chemical Engineering, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | | | | | | | | |
Collapse
|
49
|
Ellis RJ, Greskovich J, Dill SV, Kan C, Fu P, Jiang Y, Dowlati A, Machtay M. Long-term outcome after high-dose 3D conformal RT for stage III NSCLC: A single-institution experience. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e17515] [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] [Indexed: 11/20/2022] Open
|
50
|
Deng W, Zhang M, Li W, Kan C. Polar Gradient Latex Particles with Hydrophilic Core and Hydrophobic Shell Prepared via Multistep Emulsion Polymerization. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201190169] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|