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Wilson NM, Calabria C, Warren A, Finlay A, O'Donovan A, Passerello GL, Ribaric NL, Ward P, Gillespie R, Farrel R, McNarry AF, Pan D. Quantifying hospital environmental ventilation using carbon dioxide monitoring - a multicentre study. Anaesthesia 2024; 79:147-155. [PMID: 38059394 DOI: 10.1111/anae.16124] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2023] [Indexed: 12/08/2023]
Abstract
The COVID-19 pandemic has highlighted the importance of environmental ventilation in reducing airborne pathogen transmission. Carbon dioxide monitoring is recommended in the community to ensure adequate ventilation. Dynamic measurements of ventilation quantifying human exhaled waste gas accumulation are not conducted routinely in hospitals. Instead, environmental ventilation is allocated using static hourly air change rates. These vary according to the degree of perceived hazard, with the highest change rates reserved for locations where aerosol-generating procedures are performed, where medical/anaesthetic gases are used and where a small number of high-risk infective or immunocompromised patients may be isolated to reduce cross-infection. We aimed to quantify the quality and distribution of ventilation in hospital by measuring carbon dioxide levels in a two-phased prospective observational study. First, under controlled conditions, we validated our method and the relationship between human occupancy, ventilation and carbon dioxide levels using non-dispersive infrared carbon dioxide monitors. We then assessed ventilation quality in patient-occupied (clinical) and staff break and office (non-clinical) areas across two hospitals in Scotland. We selected acute medical and respiratory wards in which patients with COVID-19 are cared for routinely, as well as ICUs and operating theatres where aerosol-generating procedures are performed routinely. Between November and December 2022, 127,680 carbon dioxide measurements were obtained across 32 areas over 8 weeks. Carbon dioxide levels breached the 800 ppm threshold for 14% of the time in non-clinical areas vs. 7% in clinical areas (p < 0.001). In non-clinical areas, carbon dioxide levels were > 800 ppm for 20% of the time in both ICUs and wards, vs. 1% in operating theatres (p < 0.001). In clinical areas, carbon dioxide was > 800 ppm for 16% of the time in wards, vs. 0% in ICUs and operating theatres (p < 0.001). We conclude that staff break, office and clinical areas on acute medical and respiratory wards frequently had inadequate ventilation, potentially increasing the risks of airborne pathogen transmission to staff and patients. Conversely, ventilation was consistently high in the ICU and operating theatre clinical environments. Carbon dioxide monitoring could be used to measure and guide improvements in hospital ventilation.
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Affiliation(s)
- N M Wilson
- Department of Anaesthesia and Critical Care, Royal Infirmary of Edinburgh, Edinburgh, UK
- Usher Institute, University of Edinburgh, Edinburgh, UK
| | - C Calabria
- Department of Anaesthesia and Critical Care, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - A Warren
- Department of Anaesthesia and Critical Care, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - A Finlay
- Department of Anaesthesia and Critical Care, Victoria Hospital, Kirkcaldy, UK
| | - A O'Donovan
- Department of Process, Energy and Transport Engineering, MeSSO Research Group, Munster Technological University, Cork, Ireland
| | - G L Passerello
- Department of Anaesthesia and Critical Care, Victoria Hospital, Kirkcaldy, UK
| | - N L Ribaric
- Faculty of Medicine, University Medical Centre Hamburg-Eppendorf, University of Hamburg, Hamburg, Germany
| | - P Ward
- Department of Anaesthesia, St John's Hospital, Livingston, UK
| | - R Gillespie
- Department of Anaesthesia and Critical Care, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - R Farrel
- Department of Anaesthesia and Critical Care, Victoria Hospital, Kirkcaldy, UK
| | - A F McNarry
- Department of Anaesthesia, Western General Hospital, UK
| | - D Pan
- Department of Respiratory Sciences, University of Leicester, Leicester, UK
- Department of Infectious Diseases and HIV Medicine, University Hospitals of Leicester NHS Trust, Leicester, UK
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Chang C, Zong M, Teng Y, Zeng X, Guo Y, Pan D, Zhang T, Wu Z. Preparation and characterisation of novel casein-gum Arabic composite microcapsules for targeted in vivo delivery of Lactiplantibacillus plantarum A3. Benef Microbes 2024; 15:51-66. [PMID: 38350470 DOI: 10.1163/18762891-20230065] [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] [Received: 06/19/2023] [Accepted: 11/08/2023] [Indexed: 02/15/2024]
Abstract
The health benefits of probiotics in the body are predicated on their ability to remain viable in harsh gastrointestinal conditions and complex pathological microenvironments. Casein and gum Arabic (GA), with dual emulsifying and stabilising effects in colloidal systems. Therefore, the objective of this research was to develop a novel microcapsule to encapsulate Lactiplantibacillus plantarum A3 using casein and GA as wall materials to improve the survival of the bacteria during gastrointestinal digestion, storage and lyophilization. The casein and GA composite microcapsules were prepared and characterised by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). It was found that the microcapsules had stable morphology, uniform size and spherical shape. The results revealed that the encapsulation of microcapsules significantly improved the survival of L. plantarum A3 in gastrointestinal fluid environment (5.52 × 109 cfu/ml) and lyophilization treatment (6.25 × 109 cfu/ml). Furthermore, the microencapsulated L. plantarum A3 exhibited an improved ability to regulate intestinal microbiota by effectively increasing the relative abundance of Bacteroidetes, Proteobacteria and Actinobacteria and decreasing the relative abundance of Firmicutes in vivo. The findings of the study will help to design a lactic acid bacteria encapsulation system based on the gastrointestinal environment and provide a basis for the development of probiotic functional products.
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Affiliation(s)
- C Chang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China P.R
| | - M Zong
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China P.R
| | - Y Teng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China P.R
| | - X Zeng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China P.R
| | - Y Guo
- College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China P.R
| | - D Pan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China P.R
| | - T Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China P.R
| | - Z Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, College of Food Science and Engineering, Ningbo University, Ningbo, Zhejiang, China P.R
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Del Palacio A, Corallo B, Simoens M, Cea J, de Aurrecoechea I, Martinez I, Sanchez A, Stewart S, Pan D. Major Fusarium species and mycotoxins associated with freshly harvested maize grain in Uruguay. Mycotoxin Res 2023; 39:379-391. [PMID: 37442904 DOI: 10.1007/s12550-023-00498-y] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 05/22/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023]
Abstract
Fusarium species are common fungal pathogens of maize. Fusarium graminearum and Fusarium verticillioides, among others, can cause maize ear rot, and they are also mycotoxin producers. The aims of this work were to determine the frequency and diversity of Fusarium species in Uruguayan maize kernels, evaluate the toxigenic potential of the isolates, determine toxin contamination levels on freshly harvested grain, and assess the sensitivity of main Fusarium species against fungicides. Fusarium verticillioides was the most frequent species isolated, followed by Fusarium graminearum sensu stricto. Of F. verticillioides isolates studied for fumonisin production, 72% produced fumonisin B1 and 32% fumonisin B2. Considering in vitro toxin production by F. graminearum sensu stricto isolates, deoxynivalenol was the main toxin produced, followed by zearalenone and nivalenol. Fumonisins were the most frequently found toxins on freshly harvested maize samples (98% in 2018 and 86% in 2019), and also, fumonisin B1 was the toxin with highest concentration in both years studied (4860 µg/kg in 2018 and 1453 µg/kg in 2019). Deoxynivalenol and zearalenone were also found as contaminants. Metconazole and epoxiconazole were the most effective fungicides tested on F. verticillioides isolates. Fusarium graminearum sensu stricto isolates also were more sensitive to metconazole compared to other fungicides; nevertheless, epoxiconazole was less efficient in controlling this species. This is the first study that reports Fusarium species and mycotoxin contamination levels associated with maize grain in Uruguay. Its detection is the main step to develop management strategies in order to minimize fungal infection in maize crops.
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Affiliation(s)
- A Del Palacio
- Laboratorio de Micología, Facultad de Ciencias-Facultad de Ingeniería, UdelaR, 565, 11200, Montevideo, Julio Herreray Reissig , Uruguay
| | - B Corallo
- Laboratorio de Micología, Facultad de Ciencias-Facultad de Ingeniería, UdelaR, 565, 11200, Montevideo, Julio Herreray Reissig , Uruguay
| | - M Simoens
- Departamento de Análisis de Productos Agropecuarios, Laboratorio Tecnológico del Uruguay, Montevideo, Uruguay
| | - Jacqueline Cea
- Departamento de Análisis de Productos Agropecuarios, Laboratorio Tecnológico del Uruguay, Montevideo, Uruguay
| | - I de Aurrecoechea
- Departamento de Granos, Ministerio de Ganadería, Dirección General de Servicios Agrícolas, Agricultura y Pesca, Montevideo, Uruguay
| | - I Martinez
- Fundación del Laboratorio Tecnológico del Uruguay, Montevideo, Uruguay
| | - A Sanchez
- Fundación del Laboratorio Tecnológico del Uruguay, Montevideo, Uruguay
| | - S Stewart
- Programa Cultivos de Secano, Instituto Nacional de Investigación Agropecuaria, Estación Experimental La Estanzuela, Colonia, Uruguay
| | - D Pan
- Laboratorio de Micología, Facultad de Ciencias-Facultad de Ingeniería, UdelaR, 565, 11200, Montevideo, Julio Herreray Reissig , Uruguay.
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Pan D, Yang SS, Meng FY, Mao P, Huang MK, Mu HM. [Multimodal imaging features of acute macular retinopathy in patients with COVID-19]. Zhonghua Yan Ke Za Zhi 2023; 59:557-565. [PMID: 37408427 DOI: 10.3760/cma.j.cn112142-20230109-00015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Objective: To investigate the multimodal imaging characteristics of acute macular retinopathy (AMR) and/or parafoveal acute middle maculopathy (PAMM) in patients with coronavirus disease 2019 (COVID-19). Methods: It was a cross-sectional study. Eight patients (15 eyes) diagnosed with AMN and/or PAMM, who presented for their initial visit at Kaifeng Eye Hospital between December 17 and December 31, 2022 and were also confirmed positive for COVID-19, were enrolled as the observation group. The patients were classified into four types based on swept-source optical coherence tomography (SS-OCT) findings. Fifteen healthy volunteers (15 eyes) without ocular or systemic diseases were recruited as the healthy control group, and one eye was randomly selected for analysis. All participants underwent detailed ophthalmic examinations, including best-corrected visual acuity (BCVA), slit-lamp biomicroscopy, fundus photography (FP), intraocular pressure measurement, fundus infrared imaging, OCT and OCT angiography (OCTA). The foveal avascular zone (FAZ) area of the macular center was measured. General information and multimodal imaging findings were collected and analyzed. The superficial capillary plexus vessel density (SCP-VD) and deep capillary plexus vessel density (DCP-VD) were measured in circular areas with diameters of 1.0 mm, >1.0 mm and ≤3.0 mm, and>3.0 mm and ≤6.0 mm centered on the foveal center, recorded as SCP-VD1.0, 3.0, 6.0 and DCP-VD1.0, 3.0, 6.0. Statistical analyses were performed using t-tests, Mann-Whitney U tests, and chi-square tests. Results: The observation group consisted of 6 males (11 eyes) and 2 females (4 eyes) with a mean age of (26.87±11.56) years. The healthy control group included 11 males (11 eyes) and 4 females (4 eyes) with a mean age of (28.75±12.30) years. There were no statistically significant differences in age and gender distribution between the two groups (all P>0.05). All patients in the observation group experienced high fever (≥39.0 ℃) and developed ocular symptoms during the febrile period or within 24 hours after fever resolution. Among all patients, there were 5 cases (7 eyes) of Type Ⅰ, 1 case (1 eye) of Type Ⅱ, 3 cases (4 eyes) of Type Ⅲ, and 2 cases (3 eyes) of Type Ⅳ. In Type Ⅲ and Ⅳ, 3 cases (4 eyes) exhibited weakly reflective cystic spaces in the outer plexiform or outer nuclear layers, and fundus photography revealed multiple gray or reddish-brown lesions in the macular region. One case (1 eye) showed retinal superficial hemorrhage. Cotton wool spots were observed in 2 cases (4 eyes). Fundus infrared imaging showed that Type Ⅰ manifested as weak reflectivity lesions in the parafoveal central zone, with the tip pointing towards the fovea. Type Ⅱ showed no apparent abnormalities in the macular region, while Type Ⅲ and Ⅳ displayed map-like weak reflective lesions spanning the foveal center. OCTA findings demonstrated that SCP-VD1.0 in the observation group was 6.93% (4.77%, 6.93%), significantly lower than the healthy control group's 10.66% (8.05%, 10.55%) (U=174.00, P=0.016). SCP-VD3.0 in the observation group was 37.14% (32.15%, 43.48%), also lower than the healthy control group's 43.06% (38.95%, 46.55%) (U=174.00, P=0.016). DCP-VD3.0 in the observation group was 48.20% (46.11%, 50.33%), lower than the healthy control group's 51.10% (50.04%, 53.02%) (U=188.00, P=0.009). DCP-VD6.0 in the observation group was 49.27% (47.26%, 51.67%), lower than the healthy control group's 52.43% (50.07%, 53.82%) (U=70.00, P=0.004). There were no significant differences in SCP-VD6.0 and DCP-VD1.0 between the two groups (both P>0.05). Conclusions: Acute macular retinopathy in patients with COVID-19 can involve all retinal layers and present as segmental hyper-reflectivity on SS-OCT. Fundus infrared imaging reveals weak reflectivity in the affected area, fundus photography shows multiple gray or reddish-brown lesions in the macular region, and OCTA demonstrates a decrease in SCP-VD and DCP-VD.
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Affiliation(s)
- D Pan
- Department of Ophthalmology, Kaifeng Central Hospital (Kaifeng Eye Hospital), Kaifeng 475001, China
| | - S S Yang
- Department of Ophthalmology, Kaifeng Central Hospital (Kaifeng Eye Hospital), Kaifeng 475001, China
| | - F Y Meng
- Department of Ophthalmology, Kaifeng Central Hospital (Kaifeng Eye Hospital), Kaifeng 475001, China
| | - P Mao
- Department of Ophthalmology, Kaifeng Central Hospital (Kaifeng Eye Hospital), Kaifeng 475001, China
| | - M K Huang
- Department of Ophthalmology, Kaifeng Central Hospital (Kaifeng Eye Hospital), Kaifeng 475001, China
| | - H M Mu
- Department of Ophthalmology, Kaifeng Central Hospital (Kaifeng Eye Hospital), Kaifeng 475001, China
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Ying Z, Chen B, Li C, Wei B, Dai Z, Guo F, Pan D, Zhang H, Wu D, Wang X, Zhang S, Fei F, Song F. Large Exchange Bias Effect and Coverage-Dependent Interfacial Coupling in CrI 3/MnBi 2Te 4 van der Waals Heterostructures. Nano Lett 2023; 23:765-771. [PMID: 36542799 DOI: 10.1021/acs.nanolett.2c02882] [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] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Igniting interface magnetic ordering of magnetic topological insulators by building a van der Waals heterostructure can help to reveal novel quantum states and design functional devices. Here, we observe an interesting exchange bias effect, indicating successful interfacial magnetic coupling, in CrI3/MnBi2Te4 ferromagnetic insulator/antiferromagnetic topological insulator (FMI/AFM-TI) heterostructure devices. The devices originally exhibit a negative exchange bias field, which decays with increasing temperature and is unaffected by the back-gate voltage. When we change the device configuration to be half-covered by CrI3, the exchange bias becomes positive with a very large exchange bias field exceeding 300 mT. Such sensitive manipulation is explained by the competition between the FM and AFM coupling at the interface of CrI3 and MnBi2Te4, pointing to coverage-dependent interfacial magnetic interactions. Our work will facilitate the development of topological and antiferromagnetic devices.
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Affiliation(s)
- Zhe Ying
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
| | - Bo Chen
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
| | - Chunfeng Li
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
| | - Boyuan Wei
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
| | - Zheng Dai
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
| | - Fengyi Guo
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
| | - Danfeng Pan
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
- Microfabrication and Integration Technology Center, Nanjing University, Nanjing 210093, China
| | - Haijun Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
| | - Di Wu
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
| | - Xuefeng Wang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Shuai Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
- Atom Manufacturing Institute, Nanjing 211806, China
| | - Fucong Fei
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
- Atom Manufacturing Institute, Nanjing 211806, China
| | - Fengqi Song
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China
- Atom Manufacturing Institute, Nanjing 211806, China
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Chao M, Chan Y, Pan D, Holt E, Tan A, McMillan K, Ho H, Pham T, Thomas J, Orio P, Cokelek M, Joon DL, Foroudi F, Bolton D. Can Perirectal Spacing Help Reduce GI Toxicity in Patients Undergoing Post-Prostatectomy Radiotherapy? Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1155] [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: 11/30/2022]
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Holt E, Chan Y, Tan A, Liu M, Ho H, Manohar P, Pan D, Cham C, McMillan K, Joon DL, Pham T, Foroudi F, Cokelek M, Bolton D, Ng M, Guerrieri M, Chao M. The Use of HA as Rectal Spacer in Prostate Cancer Patients Undergoing Hypofractionated RT: An Australian Experience. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1173] [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: 10/31/2022]
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8
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Gao X, Guo H, Wang R, Pan D, Chen P, Chen D, Lu H, Zhang R, Zheng Y. Low Leakage Current and High Breakdown Field AlGaN/GaN MIS-HEMTs Using PECVD-SiN x as a Gate Dielectric. Micromachines (Basel) 2022; 13:1396. [PMID: 36144019 PMCID: PMC9505048 DOI: 10.3390/mi13091396] [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] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 08/21/2022] [Accepted: 08/24/2022] [Indexed: 06/16/2023]
Abstract
In this paper, SiNx film deposited by plasma-enhanced chemical vapor deposition was employed as a gate dielectric of AlGaN/GaN high electron mobility transistors (HEMTs). We found that the NH3 flow during the deposition of SiNx can significantly affect the performances of metal-insulator-semiconductor (MIS) HEMTs. Compared to that without using NH3 flow, the device with the optimized NH3 flow exhibited three orders of magnitude lower gate leakage current, two orders of magnitude higher ON/OF drain current ratio, and an increased breakdown field by 69%. In addition, an in situ N2 plasma surface treatment prepared prior to SiNx deposition can further improve DC performances of MIS-HEMTs to a very low gate leakage current of 10-9 mA/mm and a high ON/OFF drain current ratio up to 109 by reducing the interface state density. These results demonstrate the great potential for using PECVD-SiNx as a gate dielectric in GaN-based MIS-HEMTs.
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Affiliation(s)
- Xiaohui Gao
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Hui Guo
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Rui Wang
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Danfeng Pan
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
- Microfabrication and Integration Technology Center, Nanjing University, Nanjing 210023, China
| | - Peng Chen
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Dunjun Chen
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Hai Lu
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Rong Zhang
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Youdou Zheng
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
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Abstract
Layered two-dimensional dichalcogenides are potential candidates for post-silicon electronics. Here, we report insightfully experimental and theoretical studies on the fundamental Coulomb screening and scattering effects in these correlated systems, in response to the changes of three crucial Coulomb factors, including electric permittivity, interaction distance, and density of Coulomb impurities. We systematically collect and analyze the trends of electron mobility with respect to the above factors, realized by synergic modulations on channel thicknesses and gating modes in dual-gated MoS2 transistors with asymmetric dielectric cleanliness. Strict configurative form factors are developed to capture the subtle parametric changes across dimensional crossover. A full diagram of the carrier scattering mechanisms, in particular on the pronounced Coulomb scattering, is unfolded. Moreover, we clarify the presence of up to 40% discrepancy in mobility by considering the permittivity modification across dimensional crossover. The understanding is useful for exploiting atomically thin body transistors for advanced electronics.
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Affiliation(s)
- Shihao Ju
- National Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Binxi Liang
- National Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Jian Zhou
- National Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Danfeng Pan
- National Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Yi Shi
- National Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Songlin Li
- National Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
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Wu Q, Fang Z, Zhu Y, Song H, Liu Y, Su X, Pan D, Gao Y, Wang P, Yan S, Fei Z, Yao J, Shi Y. Controllable Edge Epitaxy of Helical GeSe/GeS Heterostructures. Nano Lett 2022; 22:5086-5093. [PMID: 35613359 DOI: 10.1021/acs.nanolett.2c00395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Emerging twistronics based on van der Waals (vdWs) materials has attracted great interest in condensed matter physics. Recently, more neoteric three-dimensional (3D) architectures with interlayer twist are realized in germanium sulfide (GeS) crystals. Here, we further demonstrate a convenient way for tailoring the twist rate of helical GeS crystals via tuning of the growth temperature. Under higher growth temperatures, the twist angles between successive nanoplates of the GeS mesowires (MWs) are statistically smaller, which can be understood by the dynamics of the catalyst during the growth. Moreover, we fabricate self-assembled helical heterostructures by introducing germanium selenide (GeSe) onto helical GeS crystals via edge epitaxy. Besides the helical architecture, the moiré superlattices at the twisted interfaces are also inherited. Compared with GeS MWs, helical GeSe/GeS heterostructures exhibit improved electrical conductivity and photoresponse. These results manifest new opportunities in future electronics and optoelectronics by harnessing 3D twistronics based on vdWs materials.
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Affiliation(s)
- Qi Wu
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
| | - Zixuan Fang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
| | - Yuelei Zhu
- College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. China
| | - Haizeng Song
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
| | - Yin Liu
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - Xin Su
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
| | - Danfeng Pan
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Yuan Gao
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
| | - Peng Wang
- College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. China
| | - Shancheng Yan
- School of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, P. R. China
| | - Zaiyao Fei
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
| | - Jie Yao
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - Yi Shi
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
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11
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Cui Y, Fan S, Pan D, Chao Q. [Atorvastatin inhibits malignant behaviors and induces apoptosis in human glioma cells by up-regulating miR-146a and inhibiting the PI3K/Akt signaling pathway]. Nan Fang Yi Ke Da Xue Xue Bao 2022; 42:899-904. [PMID: 35790441 DOI: 10.12122/j.issn.1673-4254.2022.06.14] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To explore the effect of atorvastatin (AVT) on biological behaviors and the miR-146a/PI3K/Akt signaling pathway in human glioma cells. METHODS Human glioma U251 cells were treated with 8.0 μmol/L AVT or transfected with a miR-146a inhibitor or a negative control fragment (miR-146a NC) prior to AVT treatment. RT-PCR was used to detect miR-146a expression in the cells, and the changes in cell proliferation rate, apoptosis, cell invasion and migration were detected using MTT assay, flow cytometry, and Transwell assay. Western blotting was performed to detect the changes in cellular expressions of proteins in the PI3K/Akt signaling pathway. RESULTS AVT treatment for 48 h resulted in significantly increased miR-146a expression and cell apoptosis (P < 0.01) and obviously lowered the cell proliferation rate, invasion index, migration index, and expressions of p-PI3K and p-Akt protein in U251 cells (P < 0.01). Compared with AVT treatment alone, transfection with miR-146a inhibitor prior to AVT treatment significantly reduced miR-146a expression and cell apoptosis (P < 0.01), increased the cell proliferation rate, promoted cell invasion and migration, and enhanced the expressions of p-PI3K and p-Akt proteins in the cells (P < 0.01); these effects were not observed following transfection with miR-146a NC group (P>0.05). CONCLUSION AVT can inhibit the proliferation, invasion and migration and promote apoptosis of human glioma cells possibly by up-regulating miR-146a expression and inhibiting the PI3K/Akt signaling pathway.
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Affiliation(s)
- Y Cui
- Department of Neurosurgery, Second Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - S Fan
- Department of Neurosurgery, Second Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - D Pan
- Department of Neurosurgery, Second Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Q Chao
- Department of Neurosurgery, Second Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
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Katayama K, Pan D, Oda M, Okubo T, Mori K. AB1335 BONE MARROW EDEMA SCORE IN HAND X-RAY FILM BY AI DEEP LEARNING ASSOCIATE WITH MRI BONE EDEMA IN RHEUMATOID ARTHRITIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundRapid radiographic progression (RRP) was reported to be one of clinical symptom in difficult to treat RA(D2T RA) (1). Eular recommendation for imaging showed BME is strong and independent prognostic factor for bone destruction(2). We reported bone marrow edema (BME) in MRI image was most associated with RRP compared with bone erosion, synovitis in Adalimumab add-on therapy in MTX-IR RA patients(3). To rescue RRP, early detection of BME is important although cost of MRI is expensive and hard to repeat.ObjectivesTo investigate the score of BME in hand X ray film by deep learning between X ray film and MRI BME information can discriminate the differences between BME and non-BME images.MethodsIn this work, we use a neural network consisted of convolutional layers and fully connected layers to classify X-ray images (Figure 1) In this paper, the output is the socre of BME which ranges from 0 to1(threshold = 0.4). We also used an interpretation technique called the Grad-CAM for visual explanations. Hand MRI (1.5T) were used.Figure 1.The convolutional neural network design. A red block “Conv” means a convolutional block. It contains a 2D convolution layer, a leaky relu activation function, a maxpooling layer and a batch normalization layer. The numbers above each “Conv” block are (kernal size, kernal size, kernal number). A green block “FC” is a fully connection layer. The number above it is (neuron number). After the last Softmax layer, the output becomes the probability of BME which ranges from 0 to 1.ResultsRegarding data split, 104 images including 79 non-BME images and 25 BME images are used as a hold-out test set. The rest of the images (473 images) are used as training data and validation data. Five fold cross-validation is used for these 473images. For each fold, there are about 378 images including 297 non-BME images and 81 BME images in the training set. There are about 95 images including 74 non-BME images and 21 BME images in the validation set. In order to fully utilize every image and unify the distribution of the training set and the validation set, the ratio of non-BME and BME is controlled to be the same which is about 3.66:1. The five folds showed similar performance on the hold-out test set. AUC is the area under the ROC curve. As the result, AUC which indicates the general performance of this model, ranged from 0.88 to 0.91. The average precision was 63% and the average recall rate was 87%. In this experiment, the initialization seed will greatly influence the final result. For example, AUC can be reduced to 0.73 from 0.89 because of a different initialization seed. It perhaps results from the shortage of data, which can easily make the neural network drop into a local minimum.We also utilized Grad-cam to visualize the result. The result of Grad-cam shows the importance of each part to the final prediction(Figure 2).Figure 2.Result of Grad-cam. Numbers in the parenthesises are the possibilities of BME. The middle case is unexpected because red region is the surrounding of the hand. The left and right cases may indicate the evidence for prediction.ConclusionThe preliminary result is much better than a random guess. According to this result, there should be a certain difference between BME and non-BME images. If it’s the characteristic of BME that domains this difference, our classification algorithm will be feasible for BME. Our future work is to justify the evidence of the predictions and improve performance.References[1]Nagy G et al. Eular definition of difficult- to - treat to rheumatoid arthritis. Ann Rheum Dis 2021;80:31-35[2]Colebatch AN et al. Eular recommendation for the use of imaging of joints in the clinical management of rheumatoid arthritis. Ann Rheum Dis 2013;72: 804-814[3]Katayama K et al. Bone marrow OEDEMA is more associated with rapid radiographic progression than in synovitis or bone erosion by using low field MRI in bio-naiive rheumatoid arthritis patients treated with adalimumab and methotrexate combination therapy. Ann Rheum Dis 2014, eular meeting SAT0100.Disclosure of InterestsNone declared
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Cuthbert JJ, Brown OI, Urbinati A, Pan D, Pellicori P, Dobbs K, Bulemfu J, Kazmi S, Sokoreli I, Pauws SC, Riistama JM, Cleland JGF, Clark AL. Hypochloraemia following admission to hospital with heart failure is common and associated with an increased risk of readmission or death: a report from OPERA-HF. Eur Heart J Acute Cardiovasc Care 2022; 11:43-52. [PMID: 34897402 DOI: 10.1093/ehjacc/zuab097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 08/19/2021] [Revised: 09/19/2021] [Accepted: 10/11/2021] [Indexed: 06/14/2023]
Abstract
AIMS Hypochloraemia is common in patients hospitalized with heart failure (HF) and associated with a high risk of adverse outcomes during admission and following discharge. We assessed the significance of changes in serum chloride concentrations in relation to serum sodium and bicarbonate concentrations during admission in a cohort of 1002 consecutive patients admitted with HF and enrolled into an observational study based at a single tertiary centre in the UK. METHODS AND RESULTS Hypochloraemia (<96 mmol/L), hyponatraemia (<135 mmol/L), and metabolic alkalosis (bicarbonate >32 mmol/L) were defined by local laboratory reference ranges. Outcomes assessed were all-cause mortality, all-cause mortality or all-cause readmission, and all-cause mortality or HF readmission. Cox regression and Kaplan-Meier curves were used to investigate associations with outcome. During a median follow-up of 856 days (interquartile range 272-1416), discharge hypochloraemia, regardless of serum sodium, or bicarbonate levels was associated with greater all-cause mortality [hazard ratio (HR) 1.44, 95% confidence interval (CI) 1.15-1.79; P = 0.001], all-cause mortality or all-cause readmission (HR 1.26, 95% CI 1.04-1.53; P = 0.02), and all-cause mortality or HF readmission (HR 1.41, 95% CI 1.14-1.74; P = 0.002) after multivariable adjustment. Patients with concurrent hypochloraemia and natraemia had lower haemoglobin and haematocrit, suggesting congestion; those with hypochloraemia and normal sodium levels had more metabolic alkalosis, suggesting decongestion. CONCLUSION Hypochloraemia is common at discharge after a hospitalization for HF and is associated with worse outcome subsequently. It is an easily measured clinical variables that is associated with morbidity or mortality of any cause.
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Affiliation(s)
- J J Cuthbert
- Department of Cardiorespiratory Medicine, Centre for Clinical Sciences, Hull York Medical School, University of Hull, Kingston-Upon-Hull, East Riding of Yorkshire HU6 7RX, UK
- Department of Cardiology, Castle Hill Hospital, Hull University Teaching Hospitals Trust, Castle Road, Cottingham, Kingston-Upon-Hull, East Riding of Yorkshire HU3 2JZ, UK
| | - O I Brown
- Department of Cardiorespiratory Medicine, Centre for Clinical Sciences, Hull York Medical School, University of Hull, Kingston-Upon-Hull, East Riding of Yorkshire HU6 7RX, UK
- Department of Cardiology, Castle Hill Hospital, Hull University Teaching Hospitals Trust, Castle Road, Cottingham, Kingston-Upon-Hull, East Riding of Yorkshire HU3 2JZ, UK
| | - A Urbinati
- Department of Cardiorespiratory Medicine, Centre for Clinical Sciences, Hull York Medical School, University of Hull, Kingston-Upon-Hull, East Riding of Yorkshire HU6 7RX, UK
| | - D Pan
- Department of Cardiorespiratory Medicine, Centre for Clinical Sciences, Hull York Medical School, University of Hull, Kingston-Upon-Hull, East Riding of Yorkshire HU6 7RX, UK
| | - P Pellicori
- Robertson Centre for Biostatistics, Glasgow Clinical Trials Unit, University of Glasgow, Glasgow G12 8QQ, UK
| | - K Dobbs
- Department of Cardiorespiratory Medicine, Centre for Clinical Sciences, Hull York Medical School, University of Hull, Kingston-Upon-Hull, East Riding of Yorkshire HU6 7RX, UK
| | - J Bulemfu
- Department of Cardiorespiratory Medicine, Centre for Clinical Sciences, Hull York Medical School, University of Hull, Kingston-Upon-Hull, East Riding of Yorkshire HU6 7RX, UK
| | - S Kazmi
- Department of Cardiorespiratory Medicine, Centre for Clinical Sciences, Hull York Medical School, University of Hull, Kingston-Upon-Hull, East Riding of Yorkshire HU6 7RX, UK
| | - I Sokoreli
- Remote Patient Management & Chronic Care, Philips Research, Eindhoven 5656 AE, the Netherlands
| | - S C Pauws
- Remote Patient Management & Chronic Care, Philips Research, Eindhoven 5656 AE, the Netherlands
- Department of Communication and Cognition, Tilburg University, Tilburg 5037 AB, the Netherlands
| | - J M Riistama
- Philips Image Guided Therapy Devices, Best 1096 BC, The Netherlands
| | - J G F Cleland
- Robertson Centre for Biostatistics, Glasgow Clinical Trials Unit, University of Glasgow, Glasgow G12 8QQ, UK
| | - A L Clark
- Department of Cardiology, Castle Hill Hospital, Hull University Teaching Hospitals Trust, Castle Road, Cottingham, Kingston-Upon-Hull, East Riding of Yorkshire HU3 2JZ, UK
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Lawson CD, Hornigold K, Pan D, Niewczas I, Andrews S, Clark J, Welch HCE. Small-molecule inhibitors of P-Rex guanine-nucleotide exchange factors. Small GTPases 2022; 13:307-326. [PMID: 36342857 PMCID: PMC9645260 DOI: 10.1080/21541248.2022.2131313] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
P-Rex1 and P-Rex2 are guanine-nucleotide exchange factors (GEFs) that activate Rac small GTPases in response to the stimulation of G protein-coupled receptors and phosphoinositide 3-kinase. P-Rex Rac-GEFs regulate the morphology, adhesion and migration of various cell types, as well as reactive oxygen species production and cell cycle progression. P-Rex Rac-GEFs also have pathogenic roles in the initiation, progression or metastasis of several types of cancer. With one exception, all P-Rex functions are known or assumed to be mediated through their catalytic Rac-GEF activity. Thus, inhibitors of P-Rex Rac-GEF activity would be valuable research tools. We have generated a panel of small-molecule P-Rex inhibitors that target the interface between the catalytic DH domain of P-Rex Rac-GEFs and Rac. Our best-characterized compound, P-Rex inhibitor 1 (PREX-in1), blocks the Rac-GEF activity of full-length P-Rex1 and P-Rex2, and of their isolated catalytic domains, in vitro at low-micromolar concentration, without affecting the activities of several other Rho-GEFs. PREX-in1 blocks the P-Rex1 dependent spreading of PDGF-stimulated endothelial cells and the production of reactive oxygen species in fMLP-stimulated mouse neutrophils. Structure-function analysis revealed critical structural elements of PREX-in1, allowing us to develop derivatives with increased efficacy, the best with an IC50 of 2 µM. In summary, we have developed PREX-in1 and derivative small-molecule compounds that will be useful laboratory research tools for the study of P-Rex function. These compounds may also be a good starting point for the future development of more sophisticated drug-like inhibitors aimed at targeting P-Rex Rac-GEFs in cancer.
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Affiliation(s)
- CD Lawson
- Signalling Programme, The Babraham Institute, Babraham Research Campus, CambridgeCB22 3AT, UK
| | - K Hornigold
- Signalling Programme, The Babraham Institute, Babraham Research Campus, CambridgeCB22 3AT, UK
| | - D Pan
- Signalling Programme, The Babraham Institute, Babraham Research Campus, CambridgeCB22 3AT, UK
| | - I Niewczas
- Biological Chemistry Facility, The Babraham Institute, Babraham Research Campus, CambridgeCB22 3AT, UK
| | - S Andrews
- Bioinformatics Facility, The Babraham Institute, Babraham Research Campus, CambridgeCB22 3AT, UK
| | - J Clark
- Biological Chemistry Facility, The Babraham Institute, Babraham Research Campus, CambridgeCB22 3AT, UK
| | - HCE Welch
- Signalling Programme, The Babraham Institute, Babraham Research Campus, CambridgeCB22 3AT, UK,CONTACT HCE Welch Signalling Programme, The Babraham Institute, Babraham Research Campus, CambridgeCB22 3ATUK
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Li T, Guo W, Ma L, Li W, Yu Z, Han Z, Gao S, Liu L, Fan D, Wang Z, Yang Y, Lin W, Luo Z, Chen X, Dai N, Tu X, Pan D, Yao Y, Wang P, Nie Y, Wang J, Shi Y, Wang X. Epitaxial growth of wafer-scale molybdenum disulfide semiconductor single crystals on sapphire. Nat Nanotechnol 2021; 16:1201-1207. [PMID: 34475559 DOI: 10.1038/s41565-021-00963-8] [Citation(s) in RCA: 166] [Impact Index Per Article: 55.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 07/22/2021] [Indexed: 05/28/2023]
Abstract
Two-dimensional (2D) semiconductors, in particular transition metal dichalcogenides (TMDCs), have attracted great interest in extending Moore's law beyond silicon1-3. However, despite extensive efforts4-25, the growth of wafer-scale TMDC single crystals on scalable and industry-compatible substrates has not been well demonstrated. Here we demonstrate the epitaxial growth of 2 inch (~50 mm) monolayer molybdenum disulfide (MoS2) single crystals on a C-plane sapphire. We designed the miscut orientation towards the A axis (C/A) of sapphire, which is perpendicular to the standard substrates. Although the change of miscut orientation does not affect the epitaxial relationship, the resulting step edges break the degeneracy of nucleation energy for the antiparallel MoS2 domains and lead to more than a 99% unidirectional alignment. A set of microscopies, spectroscopies and electrical measurements consistently showed that the MoS2 is single crystalline and has an excellent wafer-scale uniformity. We fabricated field-effect transistors and obtained a mobility of 102.6 cm2 V-1 s-1 and a saturation current of 450 μA μm-1, which are among the highest for monolayer MoS2. A statistical analysis of 160 field-effect transistors over a centimetre scale showed a >94% device yield and a 15% variation in mobility. We further demonstrated the single-crystalline MoSe2 on C/A sapphire. Our method offers a general and scalable route to produce TMDC single crystals towards future electronics.
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Affiliation(s)
- Taotao Li
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Wei Guo
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Liang Ma
- School of Physics, Southeast University, Nanjing, China
| | - Weisheng Li
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Zhihao Yu
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Zhen Han
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Si Gao
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Lei Liu
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Dongxu Fan
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Zixuan Wang
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Yang Yang
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Weiyi Lin
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Zhongzhong Luo
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Xiaoqing Chen
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Ningxuan Dai
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Xuecou Tu
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- Microfabrication and Integration Technology Center, Nanjing University, Nanjing, China
| | - Danfeng Pan
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- Microfabrication and Integration Technology Center, Nanjing University, Nanjing, China
| | - Yagang Yao
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Peng Wang
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Yuefeng Nie
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Jinlan Wang
- School of Physics, Southeast University, Nanjing, China.
| | - Yi Shi
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Xinran Wang
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
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16
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Meng W, Xu F, Yu Z, Tao T, Shao L, Liu L, Li T, Wen K, Wang J, He L, Sun L, Li W, Ning H, Dai N, Qin F, Tu X, Pan D, He S, Li D, Zheng Y, Lu Y, Liu B, Zhang R, Shi Y, Wang X. Three-dimensional monolithic micro-LED display driven by atomically thin transistor matrix. Nat Nanotechnol 2021; 16:1231-1236. [PMID: 34504324 DOI: 10.1038/s41565-021-00966-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
Two-dimensional materials are promising candidates for future electronics due to unmatched device performance at atomic limit and low-temperature heterogeneous integration. To adopt these emerging materials in computing and optoelectronic systems, back end of line (BEOL) integration with mainstream technologies is needed. Here, we show the integration of large-area MoS2 thin-film transistors (TFTs) with nitride micro light-emitting diodes (LEDs) through a BEOL process and demonstrate high-resolution displays. The MoS2 transistors exhibit median mobility of 54 cm2 V-1s -1, 210 μA μm-1 drive current and excellent uniformity. The TFTs can drive micrometre-sized LEDs to 7.1 × 107 cd m-2 luminance under low voltage. Comprehensive analysis on driving capability, response time, power consumption and modulation scheme indicates that MoS2 TFTs are suitable for a range of display applications up to the high resolution and brightness limit. We further demonstrate prototypical 32 × 32 active-matrix displays at 1,270 pixels-per-inch resolution. Moreover, our process is fully monolithic, low-temperature, scalable and compatible with microelectronic processing.
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Affiliation(s)
- Wanqing Meng
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Feifan Xu
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing, China
| | - Zhihao Yu
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Tao Tao
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing, China
| | - Liangwei Shao
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Lei Liu
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Taotao Li
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
| | - Kaichuan Wen
- Key Laboratory of Flexible Electronics (KLOFE) and Institution of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China
| | - Jianpu Wang
- Key Laboratory of Flexible Electronics (KLOFE) and Institution of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China
| | - Longbing He
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing, China
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing, China
| | - Weisheng Li
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Hongkai Ning
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Ningxuan Dai
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Feng Qin
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- Tianma Microelectronics Co., Ltd, Shanghai, China
| | - Xuecou Tu
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- Microfabrication and Integration Technology Center, Nanjing University, Nanjing, China
| | - Danfeng Pan
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- Microfabrication and Integration Technology Center, Nanjing University, Nanjing, China
| | - Shuzhuan He
- Nanjing PureSemi Semiconductor Co., Ltd, Nanjing, China
| | - Dabing Li
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
| | - Youdou Zheng
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing, China
| | - Yanqing Lu
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
| | - Bin Liu
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing, China.
| | - Rong Zhang
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing, China.
- Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, China.
- Institute of Future Display Technology, Tan Kah Kee Innovation Laboratory, Xiamen, China.
| | - Yi Shi
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing, China.
| | - Xinran Wang
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing, China.
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17
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Pan S, Lu Y, Liang Z, Xu C, Pan D, Zhou Y, Zhang R, Zheng Y. Optimization of annealing conditions for Ag/p-GaN ohmic contacts. Appl Phys A Mater Sci Process 2021; 127:870. [PMID: 34720447 PMCID: PMC8543412 DOI: 10.1007/s00339-021-05022-6] [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] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 10/13/2021] [Indexed: 06/13/2023]
Abstract
The electrical and optical properties of Ag/p-GaN contacts have been investigated as a function of the annealing temperature, oxygen concentration, and annealing time. Specific contact resistance (ρ c) values as low as 1.2 × 10-4 Ω·cm2 were obtained from the Ag/p-GaN contact annealed at 400 °C for 60 s in ambient O2/N2 (1:10). We found that the participation of oxygen improves the formation of ohmic contacts. Oxygen might remove the H in Mg-H complexes to activate the Mg acceptors and enhance Ga out-diffusion to form an Ag-Ga solid solution. We also found that the reflectivity of the Ag layer decreases with increasing annealing temperature in the O2-containing ambient environment. Thus, an optimal annealing condition of Ag/p-GaN for blue and green LEDs is suggested based on these results. We also used the suggested annealing conditions to form ohmic contacts on DUV LEDs and achieved good electrical performance. The forward voltages of UVC LEDs fabricated with annealed Ag contacts were 6.60 V (7.66 V) at a 40 mA (100 mA) injection current.
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Affiliation(s)
- Sai Pan
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and The School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023 China
| | - Youming Lu
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and The School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023 China
| | - Zhibin Liang
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and The School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023 China
| | - Chaojun Xu
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and The School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023 China
| | - Danfeng Pan
- Microfabrication and Integration Technology Center, Nanjing University, Nanjing, 210023 China
| | - Yugang Zhou
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and The School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023 China
| | - Rong Zhang
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and The School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023 China
| | - Youdou Zheng
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and The School of Electronic Science and Engineering, Nanjing University, Nanjing, 210023 China
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18
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Pan D, Li X, Jiang J, Luo L. Effect of levetiracetam in combination with topiramate on immune function, cognitive function, and neuronal nutritional status of children with intractable epilepsy. Am J Transl Res 2021; 13:10459-10468. [PMID: 34650715 PMCID: PMC8506992] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 05/26/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVE To determine the effects of levetiracetam in combination with topiramate on immune function, cognitive function, and the neuronal nutritional status of children with intractable epilepsy. METHODS This study enrolled 124 children with intractable epilepsy who were admitted to our hospital. The control group included 58 children treated with topiramate, and the observation group included 66 children treated with levetiracetam and topiramate. Flow cytometry was used to determine CD4+ and CD8+ T cell counts before and after treatment in both groups. RESULTS After treatment, the observation group exhibited significantly higher CD4+ T cell counts and BDNF and NGF levels and significantly lower CD8+ T cell counts and IL-6, IL-1β, and MMP-9 levels than the control group. The FIQ and VIQ of the observation group were also significantly higher than those of the control group. Additionally, the incidence rates of adverse events were not significantly different between the observation and the control groups. Finally, IL-6, IL-1β, and MMP-9 were negatively correlated with full-scale intelligence quotient (FIQ) and virtual inhibitory quotient (VIQ). CONCLUSIONS Levetiracetam in combination with topiramate is associated with reduced inflammatory response and improved immune function, cognitive function, and neuronal nutritional status in children with intractable epilepsy.
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Affiliation(s)
- Danfeng Pan
- Department of Pediatrics, The First People's Hospital of Wenling Wenling 317500, Zhejiang, China
| | - Xiaoxiao Li
- Department of Pediatrics, The First People's Hospital of Wenling Wenling 317500, Zhejiang, China
| | - Jinbiao Jiang
- Department of Pediatrics, The First People's Hospital of Wenling Wenling 317500, Zhejiang, China
| | - Lingling Luo
- Department of Pediatrics, The First People's Hospital of Wenling Wenling 317500, Zhejiang, China
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19
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Chen X, Pan D, Chen Y. The drug resistance of multidrug-resistant bacterial organisms in pediatric pneumonia patients. Am J Transl Res 2021; 13:3309-3315. [PMID: 34017503 PMCID: PMC8129425] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/23/2020] [Indexed: 06/12/2023]
Abstract
OBJECTIVE This study aimed to investigate the distribution of multidrug-resistant organisms in pediatric patients with infectious pneumonia and to analyze their resistance and risk factors. METHODS Pediatric patients infected with five MDROs (MRSA, MDR-PA, MDRAB, ESBL KP, and ESBL E. coli) and five sensitive bacteria (MSSA, PA, AB, KP, and E. coli) were recruited as the study cohort. The distribution of the MDROs and the risk factors for MDRO-infected pneumonia were investigated. The two groups' treatment costs, hospitalization times, and prognoses were compared. RESULTS A total of 219 children were included, including 3 cases of mixed infections with MDRO and sensitive bacteria (1.37%), 110 cases of MDRO infections (50.23%), and 106 cases of sensitive bacterial infections (48.40%). Imipramine was sensitive to MDR-PA, MDRAB, ESBL KP, and ESBL E. coli, and vancomycin was sensitive to MRSA. A logistic regression model and a multifactorial analysis showed that ICU treatment, mechanical ventilation, arterial and venous intubation, fiberoptic bronchoscopy, concomitant chronic lung disease, and chronic cardiovascular disease were the independent risk factors for MDRO (P < 0.05). The hospitalization times, the treatment costs, and the 30-day mortality rate of the children in the MDRO group were significantly higher than they were in the children infected with sensitive bacteria (P < 0.05). CONCLUSION Vancomycin or imipenem may result in good clinical outcomes in children treated in the ICU subject to mechanical ventilation, arterial and venous intubation, fiberoptic bronchoscopy, the overuse of antimicrobial drugs, and children with concomitant chronic lung disease or chronic cardiovascular disease.
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Affiliation(s)
- Xianbo Chen
- Department of Pediatrics, Wenling Maternal and Child Health HospitalWenling City, Zhejiang Province, China
| | - Danfeng Pan
- Department of Pediatrics, The First People’s Hospital of WenlingWenling City, Zhejiang Province, China
| | - Yongzheng Chen
- Department of Pediatrics, Wenling Maternal and Child Health HospitalWenling City, Zhejiang Province, China
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20
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Chen KH, Pan JF, Chen ZX, Pan D, Gao T, Huang M, Huang JN. Effects of hsa_circ_0000711 expression level on proliferation and apoptosis of hepatoma cells. Eur Rev Med Pharmacol Sci 2021; 24:4161-4171. [PMID: 32373952 DOI: 10.26355/eurrev_202004_20996] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To investigate the role of human serum albumin (hsa)_circular (circ)_0000711 in hepatocellular carcinoma (HCC). Circular ribonucleic acids (circRNAs) are proven in numerous studies to play crucial role in tumor biology, but their roles in HCC remain unknown to a great extent. PATIENTS AND METHODS The circRNA expression profile microarray was employed to screen differentially expressed circRNAs in tumor tissues and adjacent tissues from HCC patients, and Reverse Transcription-quantitative Polymerase Chain Reaction (RT-qPCR) assay was performed for further verification. Next, the target micro RNAs (miRNAs) and their messenger RNAs (mRNAs) of key circRNAs were predicted by bioinformatics software, and a circRNA-miRNA-mRNA regulatory network was constructed. Subsequently, KEGG and GO enrichment analyses were applied to predict the possible biological processes regulated by hsa_circ_0000711 and relevant signaling pathways. The miRNAs playing a key role in the circRNA-miRNA-mRNA regulatory network were then selected as the objects, and their direct binding to hsa_circ_0000711 was confirmed via luciferase reporter gene assay. Thereafter, hsa_circ_0000711 was overexpressed or knocked out, and the biological function of hsa_circ_0000711 was detected by cell counting kit-8 (CCK-8) assay, apoptosis detection, and 5-Ethynyl-2'-deoxyuridine (EdU) staining assay in vitro. RESULTS The results of expression profile screening revealed that there was a significant difference in the expression profile of circRNAs between tumor tissues and adjacent tissues in HCC patients. Based on the circRNA expression profile and RT-qPCR results, the expression level of hsa_circ_0000711 was overtly reduced in HCC tissues. In addition, miR-103a-3p had the highest eigenvector centrality in the circRNA-miRNA-mRNA regulatory network, suggesting that miR-103a-3p is a vital participant in the pathological mechanism of hsa_circ_0000711. The KEGG enrichment analysis results pointed out that the target genes regulated by hsa_circ_0000711 were clearly enriched in the tumor-associated signaling pathways. Besides, the results of GO enrichment analysis demonstrated that the biological processes regulated by hsa_circ_0000711 were mainly related to cell cycle regulation, so cell proliferation might be affected. The results of luciferase reporter gene and RT-qPCR assays showed that hsa_circ_0000711 directly bound to has-miR-103a-3p to serve as a molecular sponge. The results of CCK-8 and EdU staining assays revealed that the proliferation of hepatoma cells in hsa_circ_0000711 overexpression group was evidently enhanced. In addition, it was further found via flow cytometry that the apoptosis rate of cells was significantly raised in hsa_circ_0000711 low-expression group and dramatically declined in hsa_circ_0000711 overexpression group. CONCLUSIONS Overexpression of hsa_circ_0000711 promoted the proliferation and inhibited the apoptosis of hepatoma cells via targeting has-miR-103a-3p.
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Affiliation(s)
- K-H Chen
- Department of Oncology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China.
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21
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Luo Z, Peng B, Zeng J, Yu Z, Zhao Y, Xie J, Lan R, Ma Z, Pan L, Cao K, Lu Y, He D, Ning H, Meng W, Yang Y, Chen X, Li W, Wang J, Pan D, Tu X, Huo W, Huang X, Shi D, Li L, Liu M, Shi Y, Feng X, Chan PKL, Wang X. Sub-thermionic, ultra-high-gain organic transistors and circuits. Nat Commun 2021; 12:1928. [PMID: 33772009 PMCID: PMC7997979 DOI: 10.1038/s41467-021-22192-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [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: 10/13/2020] [Accepted: 02/23/2021] [Indexed: 02/02/2023] Open
Abstract
The development of organic thin-film transistors (OTFTs) with low power consumption and high gain will advance many flexible electronics. Here, by combining solution-processed monolayer organic crystal, ferroelectric HfZrOx gating and van der Waals fabrication, we realize flexible OTFTs that simultaneously deliver high transconductance and sub-60 mV/dec switching, under one-volt operating voltage. The overall optimization of transconductance, subthreshold swing and output resistance leads to transistor intrinsic gain and amplifier voltage gain over 5.3 × 104 and 1.1 × 104, respectively, which outperform existing technologies using organics, oxides and low-dimensional nanomaterials. We further demonstrate battery-powered, integrated wearable electrocardiogram (ECG) and pulse sensors that can amplify human physiological signal by 900 times with high fidelity. The sensors are capable of detecting weak ECG waves (undetectable even by clinical equipment) and diagnosing arrhythmia and atrial fibrillation. Our sub-thermionic OTFT is promising for battery/wireless powered yet performance demanding applications such as electronic skins and radio-frequency identification tags, among many others. Exploiting negative capacitance effects in organic thin-film transistors (OTFTs) is advantageous for enhancing device performance. Here, the authors report solution-processed sub-thermionic OTFTs and circuits with ferroelectric hafnium oxides that show ultra-low power and ultra-high gain.
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Affiliation(s)
- Zhongzhong Luo
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Boyu Peng
- Department of Mechanical Engineering, The University of Hongkong, Pok Fu Lam Road, Hong Kong, China.,MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Junpeng Zeng
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Zhihao Yu
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.,College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China
| | - Ying Zhao
- Key Laboratory of Microelectronics Devices and Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Jun Xie
- Department of Cardiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210093, China
| | - Rongfang Lan
- Department of Cardiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210093, China
| | - Zhong Ma
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Lijia Pan
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Ke Cao
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Yang Lu
- Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Daowei He
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Hongkai Ning
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Wanqing Meng
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Yang Yang
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Xiaoqing Chen
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Weisheng Li
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Jiawei Wang
- Key Laboratory of Microelectronics Devices and Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Danfeng Pan
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.,Microfabrication and Integration Technology Center, Nanjing University, Nanjing, 210093, China
| | - Xuecou Tu
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.,Microfabrication and Integration Technology Center, Nanjing University, Nanjing, 210093, China
| | - Wenxing Huo
- Department of Biomedical Engineering, Tianjin University, Tianjin, 300072, China
| | - Xian Huang
- Department of Biomedical Engineering, Tianjin University, Tianjin, 300072, China
| | - Dongquan Shi
- Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210093, China
| | - Ling Li
- Key Laboratory of Microelectronics Devices and Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Ming Liu
- Key Laboratory of Microelectronics Devices and Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Yi Shi
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Xue Feng
- AML, Department of Engineering Mechanics, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, China
| | - Paddy K L Chan
- Department of Mechanical Engineering, The University of Hongkong, Pok Fu Lam Road, Hong Kong, China. .,Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, New Territories, Hong Kong, China.
| | - Xinran Wang
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
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22
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Tao Z, Cao Z, Wang X, Pan D, Jia Q. Long noncoding RNA SNHG14 regulates ox-LDL-induced atherosclerosis cell proliferation and apoptosis by targeting miR-186-5p/WIPF2 axis. Hum Exp Toxicol 2021; 40:47-59. [PMID: 32735135 DOI: 10.1177/0960327120940363] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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] [Indexed: 12/24/2022]
Abstract
To investigate the role of small nucleolus RNA host gene 14 (SNHG14) in the progression of atherosclerosis (AS), bioinformatics analysis, and other relevant experiments (cell counting kit-8, flow cytometry, quantitative real-time polymerase chain reaction, luciferase reporter, RNA immunoprecipitation, RNA pull-down, and western blot assays) were done. The current study revealed that SNHG14 level was high in the serum of AS patients and oxidized low-density lipoprotein (ox-LDL)-induced AS cell lines. Besides, we found that SNHG14 accelerated cell proliferation while inhibited cell apoptosis in ox-LDL-induced AS cell lines. Next, SNHG14 was confirmed to be a sponge for miR-186-5p in AS cells, and it was validated that SNHG14 regulated AS cell proliferation and apoptosis by sponging miR-186-5p. Moreover, we uncovered that WAS-interacting protein family member 2 (WIPF2) was a downstream target of miR-186-5p in AS cells. Finally, it was demonstrated that miR-186-5p modulated AS cell proliferation and apoptosis via targeting WIPF2. To conclude, our research disclosed that SNHG14 affected ox-LDL-induced AS cell proliferation and apoptosis through miR-186-5p/WIPF2 axis, which may provide a theoretical basis for the treatment and diagnosis of AS.
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Affiliation(s)
- Z Tao
- Department of Cardiology, 74734The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Z Cao
- Department of Cardiology, 74734The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - X Wang
- Department of Geriatrics, 74734The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - D Pan
- Department of Cardiology, 74734The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Q Jia
- Department of Cardiology, 74734The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
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23
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Zhang K, Wang C, Zhang M, Bai Z, Xie FF, Tan YZ, Guo Y, Hu KJ, Cao L, Zhang S, Tu X, Pan D, Kang L, Chen J, Wu P, Wang X, Wang J, Liu J, Song Y, Wang G, Song F, Ji W, Xie SY, Shi SF, Reed MA, Wang B. A Gd@C 82 single-molecule electret. Nat Nanotechnol 2020; 15:1019-1024. [PMID: 33046843 DOI: 10.1038/s41565-020-00778-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 09/11/2020] [Indexed: 05/04/2023]
Abstract
Electrets are dielectric materials that have a quasi-permanent dipole polarization. A single-molecule electret is a long-sought-after nanoscale component because it can lead to miniaturized non-volatile memory storage devices. The signature of a single-molecule electret is the switching between two electric dipole states by an external electric field. The existence of these electrets has remained controversial because of the poor electric dipole stability in single molecules. Here we report the observation of a gate-controlled switching between two electronic states in Gd@C82. The encapsulated Gd atom forms a charged centre that sets up two single-electron transport channels. A gate voltage of ±11 V (corresponding to a coercive field of ~50 mV Å-1) switches the system between the two transport channels with a ferroelectricity-like hysteresis loop. Using density functional theory, we assign the two states to two different permanent electrical dipole orientations generated from the Gd atom being trapped at two different sites inside the C82 cage. The two dipole states are separated by a transition energy barrier of 11 meV. The conductance switching is then attributed to the electric-field-driven reorientation of the individual dipole, as the coercive field provides the necessary energy to overcome the transition barrier.
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Affiliation(s)
- Kangkang Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
| | - Cong Wang
- Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano Devices, and Department of Physics, Renmin University of China, Beijing, China
| | - Minhao Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
| | - Zhanbin Bai
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
| | - Fang-Fang Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Yuan-Zhi Tan
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Yilv Guo
- School of Physics, Southeast University, Nanjing, China
| | - Kuo-Juei Hu
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
| | - Lu Cao
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
| | - Shuai Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
| | - Xuecou Tu
- School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Danfeng Pan
- School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Lin Kang
- School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Jian Chen
- School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Peiheng Wu
- School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Xuefeng Wang
- School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Jinlan Wang
- School of Physics, Southeast University, Nanjing, China
| | - Junming Liu
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
| | - You Song
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
| | - Guanghou Wang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
| | - Fengqi Song
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China.
- Atomic Manufacture Institute, Nanjing, China.
| | - Wei Ji
- Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano Devices, and Department of Physics, Renmin University of China, Beijing, China.
| | - Su-Yuan Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China.
| | - Su-Fei Shi
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA.
- Department of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA.
| | - Mark A Reed
- Departments of Applied Physics and Electrical Engineering, Yale University, New Haven, CT, USA.
| | - Baigeng Wang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
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24
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Guo S, Chen Q, Pan D, Wu Y, Tu X, He G, Han H, Li F, Jia X, Zhao Q, Zhang H, Bei X, Xie J, Zhang L, Chen J, Kang L, Wu P. Fabrication of superconducting niobium nitride nanowire with high aspect ratio for X-ray photon detection. Sci Rep 2020; 10:9057. [PMID: 32494024 PMCID: PMC7271163 DOI: 10.1038/s41598-020-65901-5] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 04/06/2020] [Indexed: 11/09/2022] Open
Abstract
The niobium nitride (NbN) nanowires fabricated with the high-quality ultra-thin NbN film with a thickness of 3 nm–6 nm were widely used for single photon detectors. These nanowires had a low aspect ratio, less than 1:20. However, increasing the thickness and the aspect ratio of highly-uniformed NbN nanowires without reducing the superconductivity is crucial for the device in detecting high-energy photons. In this paper, a high-quality superconducting nanowire with aspect ratio of 1:1 was fabricated with optimized process, which produced a superconducting critical current of 550 μA and a hysteresis of 36 μA at 2.2 K. With the optimization of the electron beam lithography process of AR-P6200.13 and the adjustion of the chamber pressure, the discharge power, as well as the auxiliary gas in the process of reactive ion etching (RIE), the meandered NbN nanowire structure with the minimum width of 80 nm, the duty cycle of 1:1 and the depth of 100 nm were finally obtained on the silicon nitride substrate. Simultaneously, the sidewall of nanowire was vertical and smooth, and the corresponding depth-width ratio was more than 1:1. The fabricated NbN nanowire will be applied to the detection of soft X-ray photon emitted from pulsars with a sub-10 ps time resolution.
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Affiliation(s)
- Shuya Guo
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Qi Chen
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Danfeng Pan
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Yaojun Wu
- Qian Xuesen Laboratory of Space Technology, Beijing, 100094, China
| | - Xuecou Tu
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Guanglong He
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Hang Han
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Feiyan Li
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Xiaoqing Jia
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Qingyuan Zhao
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Hengbin Zhang
- Qian Xuesen Laboratory of Space Technology, Beijing, 100094, China
| | - Xiaomin Bei
- Qian Xuesen Laboratory of Space Technology, Beijing, 100094, China
| | - Jun Xie
- Qian Xuesen Laboratory of Space Technology, Beijing, 100094, China
| | - Labao Zhang
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China.
| | - Jian Chen
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Lin Kang
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
| | - Peiheng Wu
- Research Institute of Superconductor Electronics, Nanjing University, Hankou Road 22, Nanjing, 210093, China
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Xiao P, Tu X, Jiang C, Li Z, Zhou S, Pan D, Zhao Q, Jia X, Zhang L, Kang L, Chen J, Wu P. Planar double-slot antenna integrated into a Nb 5N 6 microbolometer THz detector. Opt Lett 2020; 45:2894-2897. [PMID: 32412495 DOI: 10.1364/ol.388771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 04/15/2020] [Indexed: 06/11/2023]
Abstract
In this Letter, we propose and demonstrate a new type of planar double-slot antenna for a Nb5N6 microbolometer terahertz (THz) detector. The calculated results show that the planar antenna possessed high coupling efficiency, and the THz signals were obviously focused on the antenna center place. The new planar antenna was integrated with Nb5N6 microbolometer THz detectors using micro-fabrication technology. The measured results showed that the maximum optical voltage responsivity (Ro) of the detectors reached up to 113 V/W at 0.643 THz, and the corresponding noise equivalent power was 44pW/√Hz. In addition, the performance of double-slot antennas applied into array detectors in a tunable Fabry-Perot cavity was investigated. The measured results of the Nb5N6 THz detector remained almost unchanged when the distance between the chip substrate and the copper plate was altered. This indicated that this planar double-slot antenna, which possessed the advantages of high coupling efficiency and easy integration, has great application prospects in a THz detector.
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Liu X, Li R, Hong C, Huang G, Pan D, Ni Z, Huang Y, Ren X, Cheng Y, Huang W. Highly efficient broadband photodetectors based on lithography-free Au/Bi 2O 2Se/Au heterostructures. Nanoscale 2019; 11:20707-20714. [PMID: 31642837 DOI: 10.1039/c9nr06723j] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
As one of the bismuth-based oxychalcogenide materials, Bi2O2Se ultrathin films have received intense research interest due to their high carrier mobility, narrow bandgaps, ultrafast intrinsic photoresponse and long-term ambient stability; they exhibit great potential in electronic and optoelectronic applications. However, the device performance of photodetectors based on metal/Bi2O2Se/metal structures has degraded due to the undesirable defects or contaminants from the electrode deposition or the sample transfer processes. In this work, highly efficient photodetectors based on Au/Bi2O2Se junctions were achieved with Au electrodes transferred under the assistance of a probe tip to avoid contaminants from traditional lighography methods. Furthermore, to improve the charge transfer efficiency, specifically by increasing the intensity of the electrical field at the Au/Bi2O2Se interface and along the Bi2O2Se channels, the device annealing temperature was optimized to narrow the van der Waals gap at the Au/Bi2O2Se interface and the device channel length was shortened to improve the overall device performance. Among all the devices, the maximum device photoresponsivity was 9.1 A W-1, and the device response time could approach 36 μs; moreover, the photodetectors featured broadband spectral responses from 360 nm to 1090 nm.
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Affiliation(s)
- Xiaolong Liu
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources and Beijing Key Laboratory of Energy Safety and Clean Utilization, Renewable Energy School, North China Electric Power University, Beijing 102206, China
| | - Ruiping Li
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.
| | - Chengyun Hong
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources and Beijing Key Laboratory of Energy Safety and Clean Utilization, Renewable Energy School, North China Electric Power University, Beijing 102206, China
| | - Gangfeng Huang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources and Beijing Key Laboratory of Energy Safety and Clean Utilization, Renewable Energy School, North China Electric Power University, Beijing 102206, China
| | - Danfeng Pan
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
| | - Zhenhua Ni
- Department of Physics, Southeast University, Nanjing 211189, China
| | - Yongqing Huang
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Xiaomin Ren
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Yingchun Cheng
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.
| | - Wei Huang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China. and Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China
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Li LQ, Pan D, Zhang SW, -Y-Xie D, Zheng XL, Chen H. Autophagy regulates chemoresistance of gastric cancer stem cells via the Notch signaling pathway. Eur Rev Med Pharmacol Sci 2019; 22:3402-3407. [PMID: 29917191 DOI: 10.26355/eurrev_201806_15162] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Gastric cancer is the most common gastrointestinal malignancy and the leading cause of cancer-related deaths in East Asia. Increasing evidence has revealed that autophagy is closely associated with tumor initiation and progression. The present work aimed to investigate the role of autophagy in adjuvant chemotherapy for gastric cancer. MATERIALS AND METHODS Gastric cancer stem cells (CSCs) were isolated from gastric cancer cell lines using the cell surface markers CD44 and CD54 and cultured in a three-dimensional cell culture system. Western blotting was used to detect their protein expression levels in gastric CSCs. In addition, the cells were treated with inhibitors to investigate the underlying mechanisms of autophagy. RESULTS After isolation of gastric CSCs expressing CD44 and CD54, Western blot analysis showed that the levels of the autophagic marker LC3II were markedly enhanced in CD44+CD54+ gastric CSCs. Moreover, the ratio of LC3II/LC3I protein levels was higher in CD44+CD54+ gastric CSCs than in non-CSCs. By contrast, both a chemotherapeutic agent (5-fluorouracil) and autophagy inhibitor (chloroquine) exhibited an inhibitory effect on the cell viability of gastric CSCs, and their combination further enhanced such inhibitory effects. Mechanistically, the addition of Notch inhibitor decreased the cell viability of gastric CSCs treated with 5-fluorouracil and chloroquine. In addition, 5-fluorouracil and chloroquine both increased the expression of Notch1 in gastric CSCs. CONCLUSIONS These findings show that autophagy regulated drug sensitivity of gastric cancer cells through the Notch signaling pathway.
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Affiliation(s)
- L-Q Li
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China.
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Li M, Liu Y, Xu Y, Li Y, Pan D, Wang L, Yan J, Wang X, Yang R, Yang M. Preliminary evaluation of GLP-1R PET in the diagnosis and risk stratification of pheochromocytomas. Neoplasma 2019; 67:27-36. [PMID: 31686522 DOI: 10.4149/neo_2019_190227n163] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 05/22/2019] [Indexed: 11/08/2022]
Abstract
Noninvasive imaging methods for the diagnosis and risk stratification of pheochromocytomas (PHEOs) remain a great clinical challenge. The glucagon-like peptide-1 receptor (GLP-1R) has been validated to be overexpressed in PHEOs and therefore may be a reliable target for PHEOs. In this study, we firstly synthesized a novel radiotracer 68Ga-NOTA-MAL-Cys39-exendin-4 that specifically targets GLP-1R and evaluated the performance of GLP-1R PET for the diagnosis and risk stratification of PHEOs. Cys39-exendin-4 was conjugated to NOTA-MAL and then radiolabeled with 68Ga. The reaction was completed within 20 min with a yield of 91.6 ± 2.8%. In vitro cell uptake studies validated its high specificity. PET images showed promising tumor visualization with high uptake (1.88 ± 0.10 %ID/g for PC-12 poorly differentiated tumors and 1.09 ± 0.003 %ID/g for PC-12 highly differentiated tumors at 30min after injection). There was a significant difference in the uptake of 68Ga-NOTA-MAL-Cys39-exendin-4 between PC-12 poorly and highly differentiated tumors (p < 0.001), but no significant difference could be observed by 18F-FDG PET. Biodistribution results confirmed the findings of GLP-1R PET and demonstrated that 131I-MIBG couldn't be used for the risk stratification of PHEOs. Immunohistochemistry (IHC) staining revealed differences in GLP-1R expression between PC-12 poorly and highly differentiated tumor tissues. These results demonstrated that 68Ga-NOTA-MAL-Cys39-exendin-4 can specifically target GLP-1R with favorable pharmacokinetic properties. GLP-1R PET can be used for PHEOs detection and has potential for the risk stratification of PHEOs.
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Affiliation(s)
- M Li
- School of Pharmaceutical Science, Inner Mongolia Medical University, Hohhot, China
| | - Y Liu
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China.,The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Y Xu
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China
| | - Y Li
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China
| | - D Pan
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China
| | - L Wang
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China
| | - J Yan
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China
| | - X Wang
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China
| | - R Yang
- Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China
| | - M Yang
- School of Pharmaceutical Science, Inner Mongolia Medical University, Hohhot, China.,Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, China.,The First School of Clinical Medicine, Nanjing Medical University, Nanjing, China
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Pan D, Feng D, Ding H, Zheng X, Ma Z, Yang B, Xie M. Effects of bisphenol A exposure on DNA integrity and protamination of mouse spermatozoa. Andrology 2019; 8:486-496. [PMID: 31489793 DOI: 10.1111/andr.12694] [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: 02/02/2019] [Revised: 07/04/2019] [Accepted: 07/16/2019] [Indexed: 01/18/2023]
Abstract
BACKGROUND Bisphenol A is widely used in the manufacture of polycarbonate plastics and has caused increasing concern over its potential adverse impacts on spermatogenesis. However, the effect of bisphenol A on spermiogenesis is yet to be explored. OBJECTIVES To evaluate whether bisphenol A has adverse effects on DNA integrity and protamination of spermatogenic cell. MATERIALS AND METHODS Newborn male mice were subcutaneously injected with bisphenol A (0.1, 5 mg/kg body weight, n = 15) or coin oil (control group, n = 20) daily from post-natal day 1 until 35. At post-natal day 70, epididymis caudal spermatozoa and testes were collected. Sperm count, sperm motility, and sperm morphology were analyzed. The sperm chromatin structure assay was performed to examine the sperm DNA fragmentation. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) method was used to assess apoptosis of spermatogenic cells. The ultrastructural features of testicular sections were examined under a transmission electron microscope. Western blot and RT-PCR were used to detect the expression levels of transition protein (Tnp) 1 and Tnp2, protamine (Prm) 1 and Prm2 protein, and mRNA in mice testes. RESULTS Bisphenol A significantly reduced sperm counts, impaired sperm motility, and increased the percentage of malformed spermatozoa. Poor sperm chromatin integrity and increased TUNEL-positive spermatogenic cells were also observed in mice exposed to bisphenol A. Ultrastructural analysis of testes showed that bisphenol A exposure caused incomplete chromatin condensation, retention of residual cytoplasm, and abnormal acrosome formation. In addition, the relative expression levels of Tnp2 and Prm2 in mice testes decreased significantly in bisphenol A groups. DISCUSSION AND CONCLUSION Our findings identified that neonatal bisphenol A exposure may negatively contribute to the sperm quality in adult mice. Mechanistically, we showed that bisphenol A reduced sperm chromatin integrity along with increased DNA damage, which may be due to poor protamination of spermatozoa.
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Affiliation(s)
- D Pan
- School of Bioscience and Technology, Weifang Medical University, Weifang, China.,State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, China
| | - D Feng
- Department of Obstetrics, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - H Ding
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
| | - X Zheng
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
| | - Z Ma
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
| | - B Yang
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
| | - M Xie
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
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Pei M, Qian J, Jiang S, Guo J, Yang C, Pan D, Wang Q, Wang X, Shi Y, Li Y. pJ-Level Energy-Consuming, Low-Voltage Ferroelectric Organic Field-Effect Transistor Memories. J Phys Chem Lett 2019; 10:2335-2340. [PMID: 31016982 DOI: 10.1021/acs.jpclett.9b00864] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ferroelectric organic field-effect transistors (Fe-OFETs) have attracted considerable attention because of their promising potential for memory applications, while a critical issue is the large energy consumption mainly caused by a high operating voltage and slow data switching. Here, we employ ultrathin ferroelectric polymer and semiconducting molecular crystals to create low-voltage Fe-OFET memories. Devices require only pJ-level energy consumption. The writing and erasing processes require ∼1.2 and 1.6 pJ/bit, respectively, and the reading energy is ∼1.9 pJ/bit (on state) and ∼0.2 fJ/bit (off state). Thus, our memories consume only <0.1% of the energy required for devices using bulk functional layers. Besides, our devices also exhibit low contact resistance and steep subthreshold swing. Therefore, we provide a strategy that opens up a path for Fe-OFETs toward emerging applications, such as wearable electronics.
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Affiliation(s)
- Mengjiao Pei
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Jun Qian
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Sai Jiang
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Jianhang Guo
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Chengdong Yang
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Danfeng Pan
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Qijing Wang
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Xinran Wang
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Yi Shi
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
| | - Yun Li
- National Laboratory of Solid-State Microstructures, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , People's Republic of China
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Liu Y, Sheng J, Dong Z, Xu Y, Huang Q, Pan D, Wang L, Yang M. The diagnostic performance of 18F-fluoride PET/CT in bone metastases detection: a meta-analysis. Clin Radiol 2019; 74:196-206. [DOI: 10.1016/j.crad.2018.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 12/11/2018] [Indexed: 10/27/2022]
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Khan MS, Dighe K, Wang Z, Srivastava I, Daza E, Schwartz-Dual AS, Ghannam J, Misra SK, Pan D. Detection of prostate specific antigen (PSA) in human saliva using an ultra-sensitive nanocomposite of graphene nanoplatelets with diblock-co-polymers and Au electrodes. Analyst 2019; 143:1094-1103. [PMID: 29387841 DOI: 10.1039/c7an01932g] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Prostate-specific antigen (PSA) is a commonly used biomarker for the detection of prostate cancer (PCa) and there are numerous data available for its invasive detection in the serum and whole blood. In this work, an electrochemical sensing method was devised to detect traces of PSA in human saliva using a hybrid nanocomposite of graphene nanoplatelets with diblock co-polymers and Au electrodes (GRP-PS67-b-PAA27-Au). The pure graphitic composition on filter paper provides significantly high electrical and thermal conductivity while PS67-b-PAA27 makes an amphiphilic bridge between GRP units. The sensor utilizes the binding of an anti-PSA antibody with an antigen-PSA to act as a resistor in a circuit providing an impedance change that in turn allows for the detection and quantification of PSA in saliva samples. A miniaturized electrical impedance analyzer was interfaced with a sensor chip and the data were recorded in real-time using a Bluetooth-enabled module. This fully integrated and optimized sensing device exhibited a wide PSA range of detection from 0.1 pg mL-1 to 100 ng mL-1 (R2 = 0.963) with a lower limit of detection of 40 fg mL-1. The performance of the biosensor chip was validated with an enzyme-linked immunosorbent assay technique with a regression coefficient as high as 0.940. The advantages of the newly developed saliva-PSA electrical biosensor over previously reported serum-PSA electrochemical biosensors include a faster response time (3-5 min) to achieve a stable electrical signal for PSA detection, high selectivity, improved sensitivity, no additional requirement of a redox electrolyte for electron exchange and excellent shelf life. The presented sensor is aimed for clinical commercialization to detect PSA in human saliva.
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Affiliation(s)
- M S Khan
- Bioengineering Department, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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Abstract
Human and animal studies have confirmed that inhalation of particles from ambient air or occupational settings not only causes pathophysiological changes in the respiratory system, but causes cardiovascular effects as well. At an equal mass lung burden, nanoparticles are more potent in causing systemic microvascular dysfunction than fine particles of similar composition. Thus, accumulated evidence from animal studies has led to heightened concerns about the potential short- and long-term deleterious effects of inhalation of engineered nanoparticles on the cardiovascular system. This review highlights the new observations from animal studies, which document the adverse effects of pulmonary exposure to engineered nanoparticles on the cardiovascular system and elucidate the potential mechanisms involved in regulation of cardiovascular function, in particular, how the neuronal system plays a role and reacts to pulmonary nanoparticle exposure based on both in vivo and in vitro studies. In addition, this review also discusses the possible influence of altered autonomic nervous activity on preexisting cardiovascular conditions. Whether engineered nanoparticle exposure serves as a risk factor in the development of cardiovascular diseases warrants further investigation.
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Affiliation(s)
- H Kan
- a Health Effects Laboratory Division , National Institute for Occupational Safety and Health , Morgantown , WV , USA.,b Department of Pharmaceutical Sciences , West Virginia University , Morgantown , WV , USA
| | - D Pan
- a Health Effects Laboratory Division , National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - V Castranova
- b Department of Pharmaceutical Sciences , West Virginia University , Morgantown , WV , USA
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Zhang J, Pellicori P, Pan D, Dierckx R, Clark A, Cleland J. Dynamic risk stratification using serial measurements of plasma concentrations of natriuretic peptides in patients with heart failure. Int J Cardiol 2018; 269:196-200. [DOI: 10.1016/j.ijcard.2018.06.070] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 06/16/2018] [Accepted: 06/18/2018] [Indexed: 10/28/2022]
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Pan D, Pellicori P, Urbinati A, Sze S, Clark AL. P2281Relationship of the chest x-ray and outcome in patients with hospitalised heart failure. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2281] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- D Pan
- Castle Hill Hospital, Academic Cardiology, Hull, United Kingdom
| | - P Pellicori
- Castle Hill Hospital, Academic Cardiology, Hull, United Kingdom
| | - A Urbinati
- Castle Hill Hospital, Academic Cardiology, Hull, United Kingdom
| | - S Sze
- Castle Hill Hospital, Academic Cardiology, Hull, United Kingdom
| | - A L Clark
- Castle Hill Hospital, Academic Cardiology, Hull, United Kingdom
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Heuer V, Inagaki F, Morono Y, Kubo Y, Maeda L, Bowden S, Cramm M, Henkel S, Hirose T, Homola K, Hoshino T, Ijiri A, Imachi H, Kamiya N, Kaneko M, Lagostina L, Manners H, McClelland HL, Metcalfe K, Okutsu N, Pan D, Raudsepp M, Sauvage J, Schubotz F, Spivack A, Tonai S, Treude T, Tsang MY, Viehweger B, Wang D, Whitaker E, Yamamoto Y, Yang K. Expedition 370 summary. Proceedings of the International Ocean Discovery Program 2017. [DOI: 10.14379/iodp.proc.370.101.2017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Lu Z, Li P, Wan JG, Huang Z, Tian G, Pan D, Fan Z, Gao X, Liu JM. Controllable Photovoltaic Effect of Microarray Derived from Epitaxial Tetragonal BiFeO 3 Films. ACS Appl Mater Interfaces 2017; 9:27284-27289. [PMID: 28745480 DOI: 10.1021/acsami.7b06535] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Recently, the ferroelectric photovoltaic (FePV) effect has attracted great interest due to its potential in developing optoelectronic devices such as solar cell and electric-optical sensors. It is important for actual applications to realize a controllable photovoltaic process in ferroelectric-based materials. In this work, we prepared well-ordered microarrays based on epitaxially tetragonal BiFeO3 (T-BFO) films by the pulsed laser deposition technique. The polarization-dependent photocurrent image was directly observed by a conductive atomic force microscope under ultraviolet illumination. By choosing a suitable buffer electrode layer and controlling the ferroelectric polarization in the T-BFO layer, we realized the manipulation of the photovoltaic process. Moreover, based on the analysis of the band structure, we revealed the mechanism of manipulating the photovoltaic process and attributed it to the competition between two key factors, i.e., the internal electric field caused by energy band alignments at interfaces and the depolarization field induced by the ferroelectric polarization in T-BFO. This work is very meaningful for deeply understanding the photovoltaic process of BiFeO3-based devices at the microscale and provides us a feasible avenue for developing data storage or logic switching microdevices based on the FePV effect.
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Affiliation(s)
- Zengxing Lu
- Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Peilian Li
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Jian-Guo Wan
- Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Zhifeng Huang
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Guo Tian
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Danfeng Pan
- Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
| | - Zhen Fan
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Xingsen Gao
- Institute for Advanced Materials and Laboratory of Quantum Engineering and Quantum Materials, South China Normal University , Guangzhou 510006, China
| | - Jun-Ming Liu
- Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China
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Jackson C, Stagg HR, Doshi A, Pan D, Sinha A, Batra R, Batra S, Abubakar I, Lipman M. Tuberculosis treatment outcomes among disadvantaged patients in India. Public Health Action 2017; 7:134-140. [PMID: 28695087 PMCID: PMC5493095 DOI: 10.5588/pha.16.0107] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 11/08/2016] [Accepted: 02/09/2017] [Indexed: 11/10/2022] Open
Abstract
Setting: Urban slums and poor rural areas in India, 2012-2014. Objective: To describe the characteristics of tuberculosis (TB) patients enrolled in treatment through Operation ASHA, a non-governmental organisation serving disadvantaged populations in India, and to identify risk factors for unfavourable treatment outcomes. Design: This was a retrospective cohort study. Patient characteristics were assessed for their relationship with treatment outcomes using mixed effects logistic regression, adjusting for clustering by treatment centre and Indian state. Outcomes were considered favourable (cured/treatment completed) or unfavourable (treatment failure, loss to follow-up, death, switch to multidrug-resistant TB treatment, transfer out). Results: Of 8415 patients, 7148 (84.9%) had a favourable outcome. On multivariable analysis, unfavourable outcomes were more common among men (OR 1.31, 95%CI 1.15-1.51), older patients (OR 1.12, 95%CI 1.04-1.21) and previously treated patients (OR 2.05, 95%CI 1.79-2.36). Compared to pulmonary smear-negative patients, those with extra-pulmonary disease were less likely to have unfavourable outcomes (OR 0.72, 95%CI 0.60-0.87), while smear-positive pulmonary patients were more likely to have unfavourable outcomes (OR 1.38, 95%CI 1.15-1.66 for low [scanty/1+] and OR 1.71, 95%CI 1.44-2.04 for high [2+/3+] positive smears). Conclusion: The treatment success rate within Operation ASHA is comparable to that reported nationally for India. Men, older patients, retreatment cases and smear-positive pulmonary TB patients may need additional interventions to ensure a favourable outcome.
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Affiliation(s)
- C Jackson
- Institute for Global Health, University College London (UCL), London, UK
| | - H R Stagg
- Institute for Global Health, University College London (UCL), London, UK
| | - A Doshi
- Operation ASHA, New Delhi, India
| | - D Pan
- Medical School, Imperial College London, London, UK
| | - A Sinha
- Operation ASHA, New Delhi, India
| | - R Batra
- Operation ASHA, New Delhi, India
| | - S Batra
- Operation ASHA, New Delhi, India
| | - I Abubakar
- Institute for Global Health, University College London (UCL), London, UK.,Public Health England, London, UK
| | - M Lipman
- UCL Respiratory, Division of Medicine, UCL, London, UK.,Royal Free London National Health Service Foundation Trust, London, UK
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Cai HC, Wang SJ, Fu L, Wang XM, Hou M, Qin P, Chen FP, Zhang XH, Huang H, He JS, Wu RH, Ma JY, Yang RC, Liu XF, Tian Y, Liu AJ, Wu JS, Zhu WW, Zhou YH, Liu WB, Hu Y, He WJ, Li Y, Pan D, Zhao YQ. [A prospective study of the efficacy and safety of maintenance therapy with recombinant human thrombopoietin in patients with primary immune thrombocytopenia: a multicenter study]. Zhonghua Xue Ye Xue Za Zhi 2017; 38:379-383. [PMID: 28565735 PMCID: PMC7354185 DOI: 10.3760/cma.j.issn.0253-2727.2017.05.005] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Indexed: 11/07/2022]
Abstract
Objective: To evaluate the efficacy and safety of maintenance therapy with reduced dose of rhTPO in the patients with primary immune thrombocytopenia (ITP) who attained stable platelet (PLT) counts after daily administration of rhTPO. Methods: Treatment was started with a daily administration of rhTPO (300 U/kg) for 2 consecutive weeks. Patients who attained stable PLT≥50×10(9)/L were enrolled to maintenance therapy starting with every other day administration of rhTPO, then adjusted dose interval to maintain platelet count (30-100) ×10(9)/L. Results: A total of 91 eligible patients were enrolled. Fourteen patients discontinued the study due to noncompliance (12/14) and investigator decision (2/14) . Among 77 patients who completed the study, 38 patients with the administration of rhTPO at every other day or less could maintain PLT≥30×10(9)/L for 12 weeks. The percentage of patients with a platelet response (PLT≥30×10(9)/L) at 4(th) week, 8(th) week and 12(th) week of maintain therapy was 92.6% (63/68) , 82.7% (43/52) and 85.0% (34/40) , respectively. Median platelet counts remained in the range of (70-124) ×10(9)/L. The overall incidence of rhTPO-related adverse events was 7.7%. All the adverse events were generally mild. Conclusion: Extending the dose interval of rhTPO is feasible to maintain stable platelet count in the patients with ITP, but the optimal dose interval is uncertain and might vary with individuals.
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Affiliation(s)
- H C Cai
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - S J Wang
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - L Fu
- People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
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Appleton SC, Connell DW, Singanayagam A, Bradley P, Pan D, Sanderson F, Cleaver B, Rahman A, Kon OM. Evaluation of prediagnosis emergency department presentations in patients with active tuberculosis: the role of chest radiography, risk factors and symptoms. BMJ Open Respir Res 2017; 4:e000154. [PMID: 28123749 PMCID: PMC5253606 DOI: 10.1136/bmjresp-2016-000154] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/24/2016] [Accepted: 10/26/2016] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION London has a high rate of tuberculosis (TB) with 2572 cases reported in 2014. Cases are more common in non-UK born, alcohol-dependent or homeless patients. The emergency department (ED) presents an opportunity for the diagnosis of TB in these patient groups. This is the first study describing the clinico-radiological characteristics of such attendances in two urban UK hospitals for pulmonary TB (PTB) and extrapulmonary TB (EPTB). METHODS We conducted a retrospective cohort study using the London TB Register (LTBR) and hospital records to identify patients who presented to two London ED's in the 6 months prior to their ultimate TB diagnosis 2011-2012. RESULTS 397 TB cases were identified. 39% (154/397) had presented to the ED in the 6 months prior to diagnosis. In the study population, the presence of cough, weight loss, fever and night sweats only had prevalence rates of 40%, 34%, 34% and 21%, respectively. Chest radiography was performed in 76% (117/154) of patients. For cases where a new diagnosis of TB was suspected, 73% (41/56) had an abnormal radiograph, compared with 36% (35/98) of patients where it was not. There was an abnormality on a chest radiograph in 73% (55/75) of PTB cases and also in 40% (21/52) of EPTB cases where a film was requested. CONCLUSIONS A large proportion of patients with TB present to ED. A diagnosis was more likely in the presence of an abnormal radiograph, suggesting opportunities for earlier diagnosis if risk factors, symptoms and chest radiograph findings are combined.
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Affiliation(s)
- S C Appleton
- Tuberculosis Service , Imperial College Healthcare NHS Trust , London , UK
| | - D W Connell
- Tuberculosis Service , Imperial College Healthcare NHS Trust , London , UK
| | - A Singanayagam
- Tuberculosis Service , Imperial College Healthcare NHS Trust , London , UK
| | - P Bradley
- Department of Emergency Medicine , Imperial College Healthcare NHS Trust , London , UK
| | - D Pan
- Department of Emergency Medicine , Imperial College Healthcare NHS Trust , London , UK
| | - F Sanderson
- Tuberculosis Service , Imperial College Healthcare NHS Trust , London , UK
| | - B Cleaver
- Department of Emergency Medicine , Imperial College Healthcare NHS Trust , London , UK
| | - A Rahman
- Department of Emergency Medicine , Imperial College Healthcare NHS Trust , London , UK
| | - O M Kon
- Tuberculosis Service , Imperial College Healthcare NHS Trust , London , UK
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Pan D, Shaye O, Kobashigawa J. Tacrolimus-associated Diffuse Gastrointestinal Ulcerations and Pathergy: A Case Report. Transplant Proc 2017; 49:216-217. [DOI: 10.1016/j.transproceed.2016.09.040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 09/28/2016] [Indexed: 10/20/2022]
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Wu Z, Wang G, Pan D, Guo Y, Zeng X, Sun Y, Cao J. Inflammation-related pro-apoptotic activity of exopolysaccharides isolated from Lactococcus lactis subsp. lactis. Benef Microbes 2016; 7:761-768. [DOI: 10.3920/bm2015.0192] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Exopolysaccharides (EPS) have attracted attention recently for possible use in suppressing early stage breast cancer. In this study, a mannan EPS produced by Lactococcus lactis subsp. lactis was found to affect the production of inflammatory cytokines. EPS (300 μg/ml) can significantly enhance tumour necrosis factor alpha and inducible NO synthase release in MCF-7 cells compared to control cells in a concentration-dependent manner. Also the intracellular calcium level was found to increase with the concentration of EPS. After EPS-treatment, a significant reduction in mitochondrial potential was observed, as was nuclear condensation and cell shrinkage. These results may be helpful in further understanding the anti-tumour properties of lactic acid bacteria.
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Affiliation(s)
- Z. Wu
- Department of Food Science and Nutrition, Ginling College, Nanjing Normal University, Nanjing 210097, Jiangsu, China P.R
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang Province, Marine Science School, Ningbo University, Ningbo 315211, Zhejiang, China P.R
| | - G. Wang
- Department of Landscape Engineering, Heze University, Heze 274051, Shandong, China P.R
| | - D. Pan
- Department of Food Science and Nutrition, Ginling College, Nanjing Normal University, Nanjing 210097, Jiangsu, China P.R
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang Province, Marine Science School, Ningbo University, Ningbo 315211, Zhejiang, China P.R
| | - Y. Guo
- Department of Food Science and Nutrition, Ginling College, Nanjing Normal University, Nanjing 210097, Jiangsu, China P.R
| | - X. Zeng
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang Province, Marine Science School, Ningbo University, Ningbo 315211, Zhejiang, China P.R
| | - Y. Sun
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang Province, Marine Science School, Ningbo University, Ningbo 315211, Zhejiang, China P.R
| | - J. Cao
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang Province, Marine Science School, Ningbo University, Ningbo 315211, Zhejiang, China P.R
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Bazargan-Hejazi S, Ahmadi A, Rahmani E, Mojtahedzadeh M, Pan D. 450 Profile of self-inflicted harm in los angeles by race/ethnicity, 2001–2010. Inj Prev 2016. [DOI: 10.1136/injuryprev-2016-042156.450] [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: 11/03/2022]
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Cheng H, Pan D, Tsai J. SU-F-T-608: Forward Treatment Planning Techniques On Leksell Gamma Knife for the Normalization Effect Reduction. Med Phys 2016. [DOI: 10.1118/1.4956793] [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
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Li XF, Pan D, Zhang WL, Zhou J, Liang JJ. Association of NT-proBNP and interleukin-17 levels with heart failure in elderly patients. Genet Mol Res 2016; 15:gmr8014. [PMID: 27323026 DOI: 10.4238/gmr.15028014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Pro-B-type natriuretic peptide (NT-proBNP) and interleukin-17 (IL-17) are involved in the pathophysiological processes of heart failure; however, the exact role of IL-17 is not clear. We explored the relationship between IL-17 and NT-proBNP, as a clinical parameter, in heart failure. The whole blood IL-17 and NT-proBNP levels and the readmission rates in 70 patients with chronic heart failure class III or IV according to the New York Heart Association and 35 patients with normal heart function (control group) were measured and compared. The left ventricle ejection fractions (LVEFs) and NT-proBNP and IL-17 levels in cardiac functional class III (40.38 ± 4.76%, 7780 ± 6393 pg/mL, 8.65 ± 3.05 pg/mL, respectively) and class IV (31.59 ± 4.31%, 13,704 ± 10,945, 21.10 ± 10.60 pg/mL, respectively) were higher than those in the control group (61.27 ± 5.66%, 420 ± 256 pg/mL, 3.53 ± 2.05 pg/mL, respectively). Compared to the cardiac functional class IV, class III showed significantly higher values for LVEF and NT-proBNP and IL-17 levels (P < 0.05). The readmission rates of the patients in cardiac functional class III at 3 and 6 months (15.7 and 34.4%, respectively) and cardiac functional class IV at 3 and 6 months (39.5 and 76.3%, respectively) were significantly higher than those in the control group (0 and 5.7%, respectively) (P < 0.05). The NT-proBNP and IL-17 levels increased as the heart function worsened. NT-proBNP and IL-17 may play essential roles in the process of heart failure.
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Affiliation(s)
- X F Li
- Department of Cardiology, Liaocheng People's Hospital, Liaocheng, Shandong, China
| | - D Pan
- Department of Cardiology, Liaocheng Maternal and Child Health Hospital, Liaocheng, Shandong, China
| | - W L Zhang
- Department of Cardiology, The Third People's Hospital of Liaocheng, Shandong, China
| | - J Zhou
- Liaocheng Vocational & Technical College, Liaocheng, Shandong, China
| | - J J Liang
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Jinan, Shandong, China
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Pan D, Mionetto A, Calero N, Reynoso MM, Torres A, Bettucci L. Population genetic analysis and trichothecene profiling of Fusarium graminearum from wheat in Uruguay. Genet Mol Res 2016; 15:15017270. [PMID: 26985955 DOI: 10.4238/gmr.15017270] [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: 11/03/2022]
Abstract
Fusarium graminearum sensu stricto (F. graminearum s.s.) is the major causal agent of Fusarium head blight of wheat worldwide, and contaminates grains with trichothecene mycotoxins that cause serious threats to food safety and animal health. An important aspect of managing this pathogen and reducing mycotoxin contamination of wheat is knowledge regarding its population genetics. Therefore, isolates of F. graminearum s.s. from the major wheat-growing region of Uruguay were analyzed by amplified fragment length polymorphism assays, PCR genotyping, and chemical analysis of trichothecene production. Of the 102 isolates identified as having the 15-ADON genotype via PCR genotyping, all were DON producers, but only 41 strains were also 15-ADON producers, as determined by chemical analysis. The populations were genotypically diverse but genetically similar, with significant genetic exchange occurring between them. Analysis of molecular variance indicated that most of the genetic variability resulted from differences between isolates within populations. Multilocus linkage disequilibrium analysis suggested that the isolates had a panmictic population genetic structure and that there is significant recombination occurs in F. graminearum s.s. In conclusion, tour findings provide the first detailed description of the genetic structure and trichothecene production of populations of F. graminearum s.s. from Uruguay, and expands our understanding of the agroecology of F. graminearum and of the correlation between genotypes and trichothecene chemotypes.
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Affiliation(s)
- D Pan
- Laboratorio de Micología, Facultad de Ciencias, Facultad de Ingeniería, UdelaR, Montevideo, Uruguay
| | - A Mionetto
- Laboratorio de Micología, Facultad de Ciencias, Facultad de Ingeniería, UdelaR, Montevideo, Uruguay
| | - N Calero
- Laboratorio de Micología, Facultad de Ciencias, Facultad de Ingeniería, UdelaR, Montevideo, Uruguay
| | - M M Reynoso
- Departamento de Microbiología e Immunología, Facultad de Ciencias Exactas, Físico Químicas y Naturales, Universidad Nacional de Río Cuarto, Córdoba, Argentina
| | - A Torres
- Departamento de Microbiología e Immunología, Facultad de Ciencias Exactas, Físico Químicas y Naturales, Universidad Nacional de Río Cuarto, Córdoba, Argentina
| | - L Bettucci
- Laboratorio de Micología, Facultad de Ciencias, Facultad de Ingeniería, UdelaR, Montevideo, Uruguay
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Abstract
Growth of high-quality single-crystalline InSb layers remains challenging in material science. Such layered InSb materials are highly desired for searching for and manipulation of Majorana Fermions in solid state, a fundamental research task in physics today, and for development of novel high-speed nanoelectronic and infrared optoelectronic devices. Here, we report on a new route toward growth of single-crystalline, layered InSb materials. We demonstrate the successful growth of free-standing, two-dimensional InSb nanosheets on one-dimensional InAs nanowires by molecular-beam epitaxy. The grown InSb nanosheets are pure zinc-blende single crystals. The length and width of the InSb nanosheets are up to several micrometers and the thickness is down to ∼10 nm. The InSb nanosheets show a clear ambipolar behavior and a high electron mobility. Our work will open up new technology routes toward the development of InSb-based devices for applications in nanoelectronics, optoelectronics, and quantum electronics and for the study of fundamental physical phenomena.
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Affiliation(s)
- D Pan
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences , P.O. Box 912, Beijing 100083, China
| | - D X Fan
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University , Beijing 100871, China
| | - N Kang
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University , Beijing 100871, China
| | - J H Zhi
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University , Beijing 100871, China
| | - X Z Yu
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences , P.O. Box 912, Beijing 100083, China
| | - H Q Xu
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University , Beijing 100871, China
| | - J H Zhao
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences , P.O. Box 912, Beijing 100083, China
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Misra SK, Mukherjee P, Ohoka A, Schwartz-Duval AS, Tiwari S, Bhargava R, Pan D. Vibrational spectroscopy and imaging for concurrent cellular trafficking of co-localized doxorubicin and deuterated phospholipid vesicles. Nanoscale 2016; 8:2826-31. [PMID: 26763407 PMCID: PMC4868062 DOI: 10.1039/c5nr07975f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Simultaneous tracking of nanoparticles and encapsulated payload is of great importance and visualizing their activity is arduous. Here we use vibrational spectroscopy to study the in vitro tracking of co-localized lipid nanoparticles and encapsulated drug employing a model system derived from doxorubicin-encapsulated deuterated phospholipid (dodecyl phosphocholine-d38) single tailed phospholipid vesicles.
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Affiliation(s)
- S K Misra
- Departments of Bioengineering and Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 502 N. Busey St., Urbana, IL 61801, USA.
| | - P Mukherjee
- Department of Bioengineering, Electrical and Computer Engineering, Chemical and Biomolecular Engineering, Chemistry, and Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 1304 W. Springfield Ave, Urbana, IL 61801, USA.
| | - A Ohoka
- Departments of Bioengineering and Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 502 N. Busey St., Urbana, IL 61801, USA.
| | - A S Schwartz-Duval
- Departments of Bioengineering and Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 502 N. Busey St., Urbana, IL 61801, USA.
| | - S Tiwari
- Department of Bioengineering, Electrical and Computer Engineering, Chemical and Biomolecular Engineering, Chemistry, and Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 1304 W. Springfield Ave, Urbana, IL 61801, USA.
| | - R Bhargava
- Department of Bioengineering, Electrical and Computer Engineering, Chemical and Biomolecular Engineering, Chemistry, and Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 1304 W. Springfield Ave, Urbana, IL 61801, USA.
| | - D Pan
- Departments of Bioengineering and Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 502 N. Busey St., Urbana, IL 61801, USA.
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Abbara A, Lang S, Kon OM, Collin SM, Pan D, Hansel T, Ravindran R, Holder R, John L, Davidson RN. S36 Weekly audiograms pre-emptively identify amikacin related ototoxicity in MDR-TB. Thorax 2015. [DOI: 10.1136/thoraxjnl-2015-207770.42] [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: 11/03/2022]
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Pan D, Lee E, Lock L, Batra R, Abubakar I, Batra S, Lipman M. P254 Utilising community empowerment and biometrics to improve tuberculosis treatment outcomes in Delhi’s slum population: the Op ASHA model. Thorax 2015. [DOI: 10.1136/thoraxjnl-2015-207770.390] [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: 11/04/2022]
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