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Ji L, Fu A, Liu C, Xi Y, Cui S, Gao N, Yang L, Shang W, Ma N, He G, Yang Z. A novel lysosomal targeted near-infrared probe for ratio detection of carbon monoxide in cells and in vivo. Spectrochim Acta A Mol Biomol Spectrosc 2024; 311:123987. [PMID: 38330761 DOI: 10.1016/j.saa.2024.123987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 12/28/2023] [Accepted: 01/30/2024] [Indexed: 02/10/2024]
Abstract
Carbon monoxide (CO) as an endogenous gas signaling molecule possesses important physiological functions and is of great significance in the treatment of various diseases. Real-time tracking of CO in living organisms has become a research hotspot in recent years. This article presents a lysosomal targeted near-infrared ratio fluorescence probe (TBM-CO) for selective detection of CO based on the dicyanoisophorone skeleton and morpholine fragment. The probe TBM-CO with weak ICT effect can be transformed to precursor TBM-NH2 with strong ICT effect by the traditional Tsuji-Trost reaction procession in the presence of Pd2+ ions. The mechanism was proved by DFT calculation or the MS and HPLC results respectively. In the near-infrared region an obvious ratio fluorescence intensity change (F686 / F616) is observed in vitro spectral experiments. The concentration titration experiments indicate that there is a good liner relationship between the ratio fluorescence intensity and the concentration in the range of 0 to 50 μM (R2 = 0.996) and the detection limit is calculated as 0.38 μM. The cell fluorescence imaging and co-localization experiments further demonstrate that TBM-CO is able to detect the exogenous and endogenous CO in lysosomal subcellular organelle. Finally, it was used to detect the changes of CO concentration in living mice successfully. In short, a probe with three advantages of near-infrared emission, ratiometric fluorescence and organelle targeting was reported and used to detect CO successfully in cells and in living mice.
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Affiliation(s)
- Liguo Ji
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Aoxiang Fu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Chenxu Liu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Yanbei Xi
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Shaoli Cui
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Na Gao
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Linlin Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Wanbing Shang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Nana Ma
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453003, Henan Province, PR China.
| | - Guangjie He
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China.
| | - Zhijun Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China.
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2
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Yang L, Gu P, Fu A, Xi Y, Cui S, Ji L, Li L, Ma N, Wang Q, He G. TPE-based fluorescent probe for dual channel imaging of pH/viscosity and selective visualization of cancer cells and tissues. Talanta 2023; 265:124862. [PMID: 37379755 DOI: 10.1016/j.talanta.2023.124862] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 06/06/2023] [Accepted: 06/20/2023] [Indexed: 06/30/2023]
Abstract
The development of efficient fluorescence-based detection tools with high contrast and accuracy in cancer diagnosis has recently attracted extensive attention. Changes in the microenvironments between cancer and normal cells provide new biomarkers for precise and comprehensive cancer diagnosis. Herein, a dual-organelle-targeted probe with multiple-parameter response is developed to realize cancer detection. We designed a tetraphenylethylene (TPE)-based fluorescent probe TPE-PH-KD connected with quinolinium group for simultaneous detection of viscosity and pH. Due to the restriction on the double bond's rotation, the probe respond to viscosity changes in the green channel with extreme sensitivity. Interestingly, the probe exhibited strong emission of red channel in acidic environment, and the rearrangement of ortho-OH group occurred in the basic form with weak fluorescence when pH increased. Additionally, cell colocalization studies revealed that the probe was located in the mitochondria and lysosome of cancer cells. Following treatment with carbonyl cyanide m-chloro phenylhydrazone (CCCP), chloroquine, and nystatin, the pH or viscosity changes in the dual channels are also monitored in real-time. Furthermore, the probe TPE-PH-KD could effectively discriminate cancer from normal cells and organs with high-contrast fluorescence imaging, which sparked more research on an efficient tool for highly selectively visualizing tumors at the organ level.
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Affiliation(s)
- Linlin Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Pengli Gu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Aoxiang Fu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Yanbei Xi
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Shaoli Cui
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Liguo Ji
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Lili Li
- School of Materials Science and Engineering, Henan Normal University, Xinxiang, 453003, Henan Province, PR China.
| | - Nana Ma
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453003, Henan Province, PR China
| | - Qingzhi Wang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China.
| | - Guangjie He
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China.
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Peis L, He G, Jost D, Rager G, Hackl R. Polarized tip-enhanced Raman spectroscopy at liquid He temperature in ultrahigh vacuum using an off-axis parabolic mirror. Rev Sci Instrum 2023; 94:063701. [PMID: 37862477 DOI: 10.1063/5.0139667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 05/13/2023] [Indexed: 10/22/2023]
Abstract
Tip-enhanced Raman spectroscopy (TERS) combines inelastic light scattering well below the diffraction limit down to the nanometer range and scanning probe microscopy and, possibly, spectroscopy. In this way, topographic and spectroscopic as well as single- and two-particle information may simultaneously be collected. While single molecules can now be studied successfully, bulk solids are still not meaningfully accessible. It is the purpose of the work presented here to outline approaches toward this objective. We describe a home-built, liquid helium cooled, ultrahigh vacuum TERS. The setup is based on a scanning tunneling microscope and, as an innovation, an off-axis parabolic mirror having a high numerical aperture of ∼0.85 and a large working distance. The system is equipped with a fast load-lock chamber, a chamber for the in situ preparation of tips, substrates, and samples, and a TERS chamber. Base pressure and temperature in the TERS chamber were ∼3 × 10-11 mbar and 15 K, respectively. Polarization dependent tip-enhanced Raman spectra of the vibration modes of carbon nanotubes were successfully acquired at cryogenic temperature. The new features described here including very low pressure and temperature and the external access to the light polarizations, thus the selection rules, may pave the way toward the investigation of bulk and surface materials.
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Affiliation(s)
- L Peis
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
- School of Natural Sciences, Technische Universität München, 85748 Garching, Germany
- IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - G He
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
| | - D Jost
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
- School of Natural Sciences, Technische Universität München, 85748 Garching, Germany
| | - G Rager
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
- School of Natural Sciences, Technische Universität München, 85748 Garching, Germany
| | - R Hackl
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
- School of Natural Sciences, Technische Universität München, 85748 Garching, Germany
- IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
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Gu P, Li L, Fu A, Song H, Zhao B, Wei L, Ji L, Li W, Zhang R, Wang Q, He G, Yang L. High-performance fluorescence probe for fast and specific visualization of norepinephrine in vivo and depression-like mice. Bioorg Chem 2023; 131:106306. [PMID: 36493621 DOI: 10.1016/j.bioorg.2022.106306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/11/2022] [Accepted: 11/27/2022] [Indexed: 12/04/2022]
Abstract
Norepinephrine (NE), as an important neurotransmitter, is closely associated with the pathogenesis of anxiety and depressive disorders. Effective monitoring of NE fluctuation aids in the diagnosis of depression and the therapeutic assessment of the antidepressant intervention. The construction of novel fluorescent probes with high specificity towards NE for imaging in depression models is still in demand urgently. In this work, a novel resorufin-based red-emitting fluorescent probe for real-time tracking NE was developed. NE can significantly increase the fluorescence of probe LNE by triggering deprotection of carbonothioate ligand via nucleophilic substitution. The probe LNE demonstrated significant NE selectivity and sensitivity over other analytes in vitro. In addition, probe LNE showed a fast response time (<10 min), and the change in fluorescence signal was positively linked with NE concentration, which could be utilized to track the dysregulation of NE in vivo. More importantly, this powerful probe was successfully employed for real-time visual and imaging of NE in living cells and depression-like behavior animals.
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Affiliation(s)
- Pengli Gu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Lili Li
- School of Materials Science and Engineering, Henan Normal University, Xinxiang 453003, Henan Province, PR China
| | - Aoxiang Fu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Huina Song
- School of Basic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Bin Zhao
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Lai Wei
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Liguo Ji
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Wenqiang Li
- Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang 453003, Henan Province, PR China.
| | - Ruiling Zhang
- Henan Key Laboratory of Biological Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang 453003, Henan Province, PR China
| | - Qingzhi Wang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Guangjie He
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China.
| | - Linlin Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China.
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Lin Q, Ding K, Zhao R, Wang H, Ren L, Wei Y, Ye Q, Cui Y, He G, Tang W, Feng Q, Zhu D, Chang W, Lv Y, Mao Y, Wang X, Liang L, Zhou G, Liang F, Xu J. 43O Preoperative chemotherapy prior to primary tumor resection for colorectal cancer patients with asymptomatic resectable primary lesion and synchronous unresectable liver-limited metastases (RECUT): A prospective, randomized, controlled, multicenter clinical trial. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.075] [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: 12/07/2022] Open
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Ji L, Fu Y, Yang N, Wang M, Yang L, Wang Q, Shang W, He G. A fluorescence "turn-on" probe for Cu (Ⅱ) based on flavonoid intermediates generated by copper-induced oxidative cyclization and its fluorescence imaging in living cells. Anal Biochem 2022; 655:114855. [PMID: 35987417 DOI: 10.1016/j.ab.2022.114855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 08/05/2022] [Accepted: 08/08/2022] [Indexed: 11/25/2022]
Abstract
A fluorescence "turn-on" probe for Cu (Ⅱ) ions was prepared based on the condensation reaction of coumaraldehyde and 1-hydroxy-2-acetylnaphthalene. A strong fluorescent flavonoid intermediate was formed and verified by the NMR and ESI-MS experiments. The water-soluble and pH dependence experiments were performed to confirm the optimal solvent condition (CH3CN: HEPES = 1:1, v/v, pH = 7.2-7.4). The dynamic experiments indicated that the formation process of the intermediate catalyzed by Cu(Ⅱ) ions was probably pseudo-first-order reaction process. The probe showed good selectivity toward copper ions and almost no interference except Ag+ ions by the selectivity and competitive experiments. The HeLa cells were used in the cell fluorescence imaging tests and it was demonstrated that the probe could be used in the phycological condition and showed weak cytotoxicity by the MTT experiments.
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Affiliation(s)
- Liguo Ji
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China.
| | - Yutian Fu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Nan Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Meifei Wang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Linlin Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Qingzhi Wang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China
| | - Wanbing Shang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China.
| | - Guangjie He
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, 453003, Henan Province, PR China.
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He S, Yao Y, Yang N, Wang Y, Liu D, Cao Z, Chen H, Fu Y, Yang M, Wang S, He G, Zhao Q. Dapagliflozin Protects Methamphetamine-Induced Cardiomyopathy by Alleviating Mitochondrial Damage and Reducing Cardiac Function Decline in a Mouse Model. Front Pharmacol 2022; 13:925276. [PMID: 35873593 PMCID: PMC9301370 DOI: 10.3389/fphar.2022.925276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/14/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Methamphetamine (METH)-induced cardiovascular toxicity has been attributed to its destructive effect on mitochondrial function at least to some extent. Previous studies highlighted the benefits of dapagliflozin (DAPA) on the cardiovascular system, but the response of METH-induced cardiomyopathy to DAPA is never addressed before. The present study aimed to investigate the potential ability of DAPA in preventing METH-induced cardiomyopathy.Materials and Methods: C57BL/6 mice were randomly divided into control group (n = 24), METH group (n = 24), and METH + DAPA group (n = 24). The METH-induced cardiomyopathy group received intraperitoneal METH injections at gradually increasing doses thrice weekly for 14 weeks. Mice in the METH + DAPA group were simultaneously treated with DAPA 1 mg/kg/day by intragastric administration. Echocardiography was performed to assess cardiac function. Reactive oxygen species (ROS), JC-1, and terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) assays were performed to evaluate oxidative stress, mitochondrial damage, and apoptosis, respectively. Mitochondrial and apoptosis-related protein expression was measured by western blotting.Results: Mice exposed to METH exhibited reduced cardiac function (left ventricular ejection fraction [LVEF]: 56.51 ± 6.49 vs. 73.62 ± 1.42, p < 0.01), fibrotic remodeling, and mitochondrial dysfunction, leading to apoptosis (apoptotic cells%: 7.4 ± 1.3 vs. 1.3 ± 0.5, p < 0.01). DAPA significantly reduced mitochondrial dynamics and function, ROS, apoptosis (apoptotic cells%: 2.4 ± 0.8 vs. 7.4 ± 1.3, p < 0.01), cardiac function decline (LVEF: 70.99 ± 4.936 vs. 56.51 ± 6.49, p < 0.01), and fibrotic remodeling. These results indicated that DAPA could be considered as an effective therapeutic agent in the protection against METH-associated cardiomyopathy.Conclusion: DAPA protects against METH-induced cardiomyopathy in mice by decreasing mitochondrial damage and apoptosis.
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Affiliation(s)
- Shanqing He
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Yajun Yao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Nan Yang
- School of Forensic Medicine, Xinxiang Medical University, Xinxiang, China
| | - Youcheng Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Dishiwen Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Zhen Cao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Huiyu Chen
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Yuntao Fu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Mei Yang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
| | - Songjun Wang
- Hebei Key Laboratory of Forensic Medicine, Hebei Medical University, Shijiazhuang, China
| | - Guangjie He
- School of Forensic Medicine, Xinxiang Medical University, Xinxiang, China
| | - Qingyan Zhao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovascular Research Institute of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, China
- *Correspondence: Qingyan Zhao,
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Yang L, Yang N, Gu P, Wang C, Li B, Zhang Y, Ji L, He G. A novel flavone-based ESIPT ratiometric fluorescent probe for selective sensing and imaging of hydrogen polysulfides. Spectrochim Acta A Mol Biomol Spectrosc 2022; 271:120962. [PMID: 35124456 DOI: 10.1016/j.saa.2022.120962] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 01/22/2022] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Hydrogen polysulfides (H2Sn) as an important member of reactive sulfur species is closely relevant to many physiological functions in redox homeostasis and metabolism. Dual-channel monitor the changes of H2Sn level in vivo is highly desired. Herein we design a simple ratiometric fluorescent probe based on flavone skeleton for highly selective detection of H2Sn. The probe HF-NA-MC bearing 2-fluoro-5-nitrobenzoic acid group inhibited the intramolecular ESIPT process, which show the blue fluorescence of adjacent naphthalene unit. In the presence of H2Sn, the enol form of probe is converted to conjugated keto form, resulted in a 90 nm red-shift of fluorescence emission from 450 nm to 540 nm. The ratiometric intensity (I540/I450) of the probe exhibits a good linear relationship toward H2Sn in the range of 0-120 μM, and the detection limit is estimated to be 0.63 μM. The ratiometric fluorescent probe shows high specificity and anti-interference ability for H2Sn over other related reactive sulfur species. The probe HF-NA-MC shows promising outlook and could be applied to the confocal imaging of H2Sn by dual emission channels in Hela cells.
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Affiliation(s)
- Linlin Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China.
| | - Nan Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Pengli Gu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Chuang Wang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Beining Li
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Yihua Zhang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Liguo Ji
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Guangjie He
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China.
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9
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Yang L, Yang N, Gu P, Zhang Y, Gong X, Zhang S, Li J, Ji L, He G. A novel naphthalimide-based fluorescent probe for the colorimetric and ratiometric detection of SO2 derivatives in biological imaging. Bioorg Chem 2022; 123:105801. [DOI: 10.1016/j.bioorg.2022.105801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/05/2022] [Accepted: 04/07/2022] [Indexed: 02/07/2023]
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10
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Liu J, Yin H, Shang Z, Gu P, He G, Meng Q, Zhang R, Zhang Z. Sequential detection of hypochlorous acid and sulfur dioxide derivatives by a red-emitting fluorescent probe and bioimaging applications in vitro and in vivo. RSC Adv 2022; 12:15861-15869. [PMID: 35733666 PMCID: PMC9135002 DOI: 10.1039/d2ra01048h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 05/10/2022] [Indexed: 11/21/2022] Open
Abstract
A red-emitting fluorescence probe (DP) has been successfully developed for the sequential detection of hypochlorous acid (HOCl) and sulfur dioxide derivatives (SO32−/HSO3−) in vitro and in vivo.
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Affiliation(s)
- Jianhua Liu
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning Province, 114051, P. R. China
- College of Pharmacy, Jilin Medical University, Jilin Province, 132001, P. R. China
| | - Haoyuan Yin
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning Province, 114051, P. R. China
| | - Zhuye Shang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning Province, 114051, P. R. China
| | - Pengli Gu
- School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, 453003, P. R. China
| | - Guangjie He
- School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, 453003, P. R. China
| | - Qingtao Meng
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning Province, 114051, P. R. China
| | - Run Zhang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, 4072, Australia
| | - Zhiqiang Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning Province, 114051, P. R. China
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11
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Wan X, Shen J, He G. Effects of Traditional Chinese Exercises on Frailty, Quality of Life, and Physical Function on Frail and Pre-Frail Older People: A Systematic Review and Meta-Analysis. J Frailty Aging 2022; 11:407-415. [DOI: 10.14283/jfa.2022.52] [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: 11/11/2022]
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12
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Liu SL, He SH, Wang XW, May TW, He G, Chen SL, Zhou LW. Trechisporales emended with a segregation of Sistotremastrales ord. nov. (Basidiomycota). MYCOSPHERE 2022. [DOI: 10.5943/mycosphere/13/1/11] [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: 01/15/2023] Open
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13
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Linden Y, Iliffe WR, He G, Danaie M, Fischer DX, Eisterer M, Speller SC, Grovenor CRM. Analysing neutron radiation damage in YBa 2 Cu 3 O 7-x high temperature superconductor tapes. J Microsc 2021; 286:3-12. [PMID: 34879153 DOI: 10.1111/jmi.13078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 10/27/2021] [Accepted: 11/29/2021] [Indexed: 11/30/2022]
Abstract
Superconducting windings will be necessary in future fusion reactors to generate the strong magnetic fields needed to confine the plasma, and these superconducting materials will inevitably be exposed to neutron damage. It is known that this exposure results in the creation of isolated damage cascades, but the presence of these defects alone is not sufficient to explain the degradation of macroscopic superconducting properties and a quantitative method is needed to assess the subtle lattice damage in between the clusters. We have studied REBCO coated conductors irradiated with neutrons to a cumulative dose of 3.3×1022 n*m-2 that show a degradation of both Tc and Jc values, and use HRTEM analysis to show that this irradiation introduces ∼10 nm amorphous collision cascades. In addition we introduce a new method for the analysis of these images to quantify the degree of lattice disorder in the apparently perfect matrix between these cascades. This method utilises Fast Fourier and Discrete Cosine Transformations of a statistically-relevant number of HRTEM images of pristine, neutron-irradiated, and amorphous samples, and extracts the degree of randomness in terms of entropy values. Our results show that these entropy values in both mid-frequency band FFT and DCT domains correlate with the expected level of lattice damage, with the pristine samples having the lowest and the fully amorphous regions the highest entropy values. Our methodology allows us to quantify 'invisible' lattice damage to and correlate these values to the degradation of superconducting properties, and also has relevance for a wider range of applications in the field of electron microscopy where small changes in lattice perfection need to be measured. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Y Linden
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
| | - W R Iliffe
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
| | - G He
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
| | - M Danaie
- Electron Physical Sciences Imaging Centre (ePSIC), Diamond Light Source, Didcot, UK
| | - D X Fischer
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - M Eisterer
- Atominstitut, TU Wien, Stadionallee2, A-1020, Vienna, Austria
| | - S C Speller
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
| | - C R M Grovenor
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK
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14
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Mei B, He G, Tan X, Jin W, Zhao Y, Lai Y. Giant Atrial Septal Artery Aneurysm with a Fistula to the Right Atrium. Heart Surg Forum 2021; 24:E781-E784. [PMID: 34623247 DOI: 10.1532/hsf.4031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 07/06/2021] [Indexed: 11/20/2022]
Abstract
An atrial septal artery aneurysm is a rare disease, especially accompanied with a fistula. During clinical practice, it is very important to clear the anatomical details of the coronary aneurysm before operation. In the current article, we report a giant atrial septal artery aneurysm originating from a branch of the RCA combined with a coronary right atrial fistula. The coronary artery aneurysm should be evaluated using multiple diagnostic and imaging modalities, such as echocardiography, coronary artery angiography, magnetic resonance imaging, and cardiac CT, especially three-dimensional reconstruction, which could help us to distinguish the physiological and anatomical characteristics of the CAA and fistula.
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Affiliation(s)
- Bo Mei
- Department of Cardiovascular Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China.
| | - Guangjie He
- Department of Cardiovascular Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China.
| | - Xiong Tan
- Department of Cardiovascular Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China.
| | - Weitao Jin
- Department of Cardiovascular Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China.
| | - Yaxi Zhao
- Department of Ultrasound, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China.
| | - Yinglong Lai
- Department of Cardiovascular Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China.
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15
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Yu Y, Wang J, Tan Y, Wan H, Zheng N, He Z, Mao L, Ren W, Lin Z, He G, Chen Y, Wang J, Ouyang N, Yao H. 1136P A clinically applicable cervical cancer artificial intelligence screening system for accurate cytopathological diagnosis: A multicenter population-based study and randomized controlled trial. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.778] [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: 10/20/2022] Open
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16
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Hu Y, Shang Z, Gu P, He G, Zhang R, Meng Q, Zhang Z. A Red-Emission Fluorescence Probe Based on 1,4-Addition Reaction Mechanism for the Detection of Biothiols in Vitro and in Vivo. ANAL SCI 2021; 38:505-514. [PMID: 35359268 DOI: 10.2116/analsci.21p177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 07/19/2021] [Indexed: 11/23/2022]
Abstract
In this work, a new fluorescence probe (DC) with a donor-π-acceptor (D-π-A) structure was designed and synthesized for the detection of three kinds of biothiols (Cys, Hcy and GSH) in live cells and organisms. DC displayed an intense red-emission centered at 625 nm. In the presence of biothiols, the nucleophilic addition reaction between the C=C double bond of DC and the sulfhydryl group (-SH) of biothiols occurred, resulting in obvious fluorescence quenching responses. DC exhibited high selectivity towards biothiols over other common bioactive species with low detection limits (0.26, 0.43, and 0.44 µM for Cys, Hcy and GSH, respectively). In addition, DC displayed a rapid response to biothiols within 4 min. The applications of DC in biothiols detection and imaging were then successfully demonstrated for the real-time monitoring of endogenous and exogenous biothiols in live cells and live animals.
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Affiliation(s)
- Yaoyun Hu
- School of Chemical Engineering, University of Science and Technology Liaoning
| | - Zhuye Shang
- School of Chemical Engineering, University of Science and Technology Liaoning
| | - Pengli Gu
- Medicine, Xinxiang Medical University
| | | | - Run Zhang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland
| | - Qingtao Meng
- School of Chemical Engineering, University of Science and Technology Liaoning
| | - Zhiqiang Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning
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17
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He G, Tao Q, Liu C, Zhang D, Zhou Y, Liu R. [Mn 2+-doped Prussian blue nanoparticles for T1-T2 dual-mode magnetic resonance imaging and photothermal therapy in vitro]. Nan Fang Yi Ke Da Xue Xue Bao 2021; 41:909-915. [PMID: 34238744 DOI: 10.12122/j.issn.1673-4254.2021.06.14] [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 prepare Mn2+-doped Prussian blue nanoparticles (Mn-PB NPs) for T1-T2 dual-mode magnetic resonance imaging (MRI) and photothermal therapy in vitro. OBJECTIVE Mn-PB NPs were prepared based on manganese chloride, ferrous chloride and potassium ferricyanide using the microemulsion method. The performance of T1-T2 dual-mode MRI with Mn-PB NPs and the photothermal property of the nanoparticles were assessed. CCK-8 assay and AM/PI double staining were used to evaluate the effect of photothermal therapy in vitro using the parepared nanoparticles. OBJECTIVE The prepared Mn-PB NPs had a mean particle size of 39.46±0.42 nm with a Zeta potential of -25.9±1.2 mV and exhibited a good dispersibility and uniform particle size. In MRI using the nanoparticles, the r1 and r2 values reached 0.68 and 3.65 (mmol/L)-1s-1, respectively, indicating good performance of Mn-PB NPs for T1 and T2 enhancement in MRI. When irradiated with 808 nm laser for 10 min, Mn-PB NPs showed a temperature rise to 90 ℃ to cause significant reduction of cell survival. CCK-8 assay and AM/PI double staining confirmed that Mn-PB NPs were capable of efficient killing of HepG2 cells upon 808 nm laser irradiation. OBJECTIVE The Mn-PB NPs prepared in this work have uniform particle size and show good performances both in MRI for T1 and T2 enhancement and in photothermal therapy in vitro without obvious cytotoxicity.
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Affiliation(s)
- G He
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515 China
| | - Q Tao
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515 China
| | - C Liu
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515 China
| | - D Zhang
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515 China
| | - Y Zhou
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515 China
| | - R Liu
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515 China
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18
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Tang J, He G, Yang Y, Li Q, He Y, Yu C, Luo L. Histological analysis of spermatogenesis and the germ cell seasonal development within the testis of domesticated tree shrews (Tupaia belangeri chinensis). Folia Morphol (Warsz) 2021; 81:412-420. [PMID: 33997948 DOI: 10.5603/fm.a2021.0048] [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: 03/01/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 11/25/2022]
Abstract
This study aimed to address the lack of information on the male germ cell seasonal development of domesticated tree shrews (Tupaia belangeri chinensis). Testicular tissues were collected from 60 tree shrews (n=5 per month). The ultrastructures of the testes and spermatids were examined via transmission electron microscopy. Apoptosis of spermatogenic cells was measured through terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining. The expression of proliferation factors, namely, proliferating cell nuclear antigen (PCNA) and Ki67, in testicular tissues was assayed through immunohistochemistry. Spermatids ultrastructure showed seasonal differences, and spermatogenesis was relatively active in June and July and relatively stagnant from October to November. The percentage of TUNEL-positive germ cells was less during October and November, while greater in July than other phases. The number of PCNA-nucleus-positive germ cells was most in June and July, but with cytoplasm staining from October to November. Ki67 presented positive expression in the testes from April to September, with highest expression in June, but with no expression from October to March. In summary, there are seasonal differences in tissue morphology related to spermatogenesis in domesticated tree shrews. PCNA expression and Ki67 expression are good indicators of seasonal differences in male germ cells.
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Affiliation(s)
- J Tang
- Kunming Medical University, No. 1168 Chunrong West Road, Yuhua Street, Chenggong, Kunming, 650032 Kunming, China.,Kunming Maternity and Child Health Hospital, Kunming, China
| | - G He
- Kunming Medical University, No. 1168 Chunrong West Road, Yuhua Street, Chenggong, Kunming, 650032 Kunming, China.,Yunnan Maternal and Child Health Care Hospital, Kunming, China
| | - Y Yang
- Kunming Medical University, No. 1168 Chunrong West Road, Yuhua Street, Chenggong, Kunming, 650032 Kunming, China
| | - Q Li
- Kunming Medical University, No. 1168 Chunrong West Road, Yuhua Street, Chenggong, Kunming, 650032 Kunming, China
| | - Y He
- Kunming Medical University, No. 1168 Chunrong West Road, Yuhua Street, Chenggong, Kunming, 650032 Kunming, China
| | - C Yu
- Kunming Medical University, No. 1168 Chunrong West Road, Yuhua Street, Chenggong, Kunming, 650032 Kunming, China
| | - L Luo
- Kunming Medical University, No. 1168 Chunrong West Road, Yuhua Street, Chenggong, Kunming, 650032 Kunming, China.
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19
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Arabchigavkani N, Somphonsane R, Ramamoorthy H, He G, Nathawat J, Yin S, Barut B, He K, Randle MD, Dixit R, Sakanashi K, Aoki N, Zhang K, Wang L, Mei WN, Dowben PA, Fransson J, Bird JP. Remote Mesoscopic Signatures of Induced Magnetic Texture in Graphene. Phys Rev Lett 2021; 126:086802. [PMID: 33709762 DOI: 10.1103/physrevlett.126.086802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
Mesoscopic conductance fluctuations are a ubiquitous signature of phase-coherent transport in small conductors, exhibiting universal character independent of system details. In this Letter, however, we demonstrate a pronounced breakdown of this universality, due to the interplay of local and remote phenomena in transport. Our experiments are performed in a graphene-based interaction-detection geometry, in which an artificial magnetic texture is induced in the graphene layer by covering a portion of it with a micromagnet. When probing conduction at some distance from this region, the strong influence of remote factors is manifested through the appearance of giant conductance fluctuations, with amplitude much larger than e^{2}/h. This violation of one of the fundamental tenets of mesoscopic physics dramatically demonstrates how local considerations can be overwhelmed by remote signatures in phase-coherent conductors.
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Affiliation(s)
- N Arabchigavkani
- Department of Physics, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
| | - R Somphonsane
- Department of Physics, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand
| | - H Ramamoorthy
- Department of Electronics Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand
| | - G He
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
| | - J Nathawat
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
| | - S Yin
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
| | - B Barut
- Department of Physics, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
| | - K He
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
| | - M D Randle
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
| | - R Dixit
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
| | - K Sakanashi
- Department of Materials Science, Chiba University, Chiba 263-8522, Japan
| | - N Aoki
- Department of Materials Science, Chiba University, Chiba 263-8522, Japan
| | - K Zhang
- Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - L Wang
- Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - W-N Mei
- Department of Physics, University of Nebraska Omaha, Omaha, Nebraska 68182, USA
| | - P A Dowben
- Department of Physics and Astronomy, Theodore Jorgensen Hall, University of Nebraska Lincoln, Lincoln, Nebraska 68588-0299, USA
| | - J Fransson
- Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 21 Uppsala, Sweden
| | - J P Bird
- Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260, USA
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20
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He G, Li D, Jost D, Baum A, Shen PP, Dong XL, Zhao ZX, Hackl R. Raman Study of Cooper Pairing Instabilities in (Li_{1-x}Fe_{x})OHFeSe. Phys Rev Lett 2020; 125:217002. [PMID: 33274977 DOI: 10.1103/physrevlett.125.217002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Accepted: 10/15/2020] [Indexed: 06/12/2023]
Abstract
We studied the electronic Raman spectra of (Li_{1-x}Fe_{x})OHFeSe as a function of light polarization and temperature. In the B_{1g} spectra alone we observe the redistribution of spectral weight expected for a superconductor and two well-resolved peaks below T_{c}. The nearly resolution-limited peak at 110 cm^{-1} (13.6 meV) is identified as a collective mode. The peak at 190 cm^{-1} (23.6 meV) is presumably another collective mode since the line is symmetric and its energy is significantly below the gap energy observed by single-particle spectroscopies. Given the experimental band structure of (Li_{1-x}Fe_{x})OHFeSe, the most plausible explanations include conventional spin-fluctuation pairing between the electron bands and the incipient hole band and pairing between the hybridized electron bands. The absence of gap features in A_{1g} and B_{2g} symmetry favors the second case. Thus, in spite of various differences between the pnictides and chalcogenides, this Letter demonstrates the proximity of pairing states and the importance of band structure effects in the Fe-based compounds.
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Affiliation(s)
- G He
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
| | - D Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - D Jost
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
- Fakultät für Physik E23, Technische Universität München, 85748 Garching, Germany
| | - A Baum
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
| | - P P Shen
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - X L Dong
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Z X Zhao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - R Hackl
- Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
- Fakultät für Physik E23, Technische Universität München, 85748 Garching, Germany
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21
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He Y, He G, Li QQ, Lin W, Yuan GQ. First Report of Stagonosporopsis vannaccii Causing Leaf Spot on Crassocephalum crepidioides in China. Plant Dis 2020; 105:499-499. [PMID: 32910727 DOI: 10.1094/pdis-02-20-0345-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Crassocephalum crepidioides (Benth.) S. Moore, native to tropical Africa, is an important invasive weed in many countries, seriously threatening the safety of agricultural ecosystem. During December 2018, 100% of C. crepidioides plants exhibited leaf spots in the Kudzu (Pueraria lobata) garden in Tianlin County, Baise City, Guangxi, China (24°40'20.42″N, 106°11'33.51″E), but Kudzu was not affected by this disease. The leaf spots appeared as small brown spots surrounded by a yellow-green halo initially, enlarged to subrotund or irregular in shape, slightly sunken, then developed as a dark brown to dark spot with grey-white necrotic center (Supplementary Fig. 1 a,b), and exuded an orange droplet under high humidity conditions (Supplementary Fig. 1 c). Symptomatic leaf tissues were cut into small pieces (5 x 5 mm) from the junction of necrotic and healthy tissues, and small pieces were disinfected in 75% ethanol solution for 30 s and 0.1% mercury dichloride for 30 sec, then rinsed with sterile water 3 times. These tissues were plated onto potato dextrose agar (PDA) medium and incubated in a thermostatic incubator at 28°C under natural sunlight conditions. Four isolates with similar morphological features were obtained after purification. Colonies of these isolates exhibited creme-orange margins and aerial mycelium was sparse. The colonies formed concentric circles on the surface that were fusco-black, violet-slate and vinaceus-grey (from centre to edge), fusco-black on the reverse after 7 days (Supplementary Fig. 2 a,b), and then the pycnidia and conidia produced for about 30 days (Supplementary Fig. 2 c). Pycnidia of representative isolate YTH-12 were black, subglobose, and unilocular, 95.60-168.27 μm (average 128.32 µm) (n = 40) in diameter. The ostiole was single and central, slightly papillate to papillate and occasionally rostrate (Supplementary Fig. 2 d). Conidia were hyaline, oval to elliptical, aseptate, 2.30 to 5.83 × 1.42 to 3.50 µm (average, 4.36 × 2.03 µm) (n = 50) (Supplementary Fig. 2 e). These morphological characters are consistent with those described for Stagonosporopsis vannaccii (Crous et al. 2019). To further identify the isolate YTH-12, the rDNA internal transcribed spacer (ITS) region, 28s large subunit ribosomal RNA (LSU), RNA polymerase II second largest subunit (RPB2) gene and β-tubulin (TUB2) gene were amplified by polymerase chain reaction using the primer pairs ITS1/ITS4 (White et al. 1990), LR0R (Rehner and Samuels 1994)/LR7 (Vilgalys and Hester 1990), Btub2Fd/Btub4Rd (Woudenberg et al. 2009) and RPB2-5F2 (Sung et al. 2007)/fRPB2-7cR (Liu et al. 1999), respectively. The PCR products were purified and sequenced by Sangon Biotech Co. Ltd. (Shanghai, China). The sequences were deposited in GenBank (accession nos. MN892355, MN893911, MN905510 and MN905511). The ITS (522 bp), LSU (1313 bp), TUB2 (380 bp) and RPB2 (1193 bp) nucleotide sequences showed 100% identity to S. vannaccii strain LFNO148 (accession nos. MK519453, MK519452, MK519454 and MN534891). Phylogenetic analysis based on the multi-locus sequences of ITS, LSU, RPB2 and TUB2 was performed in MEGA version 6.0 (Chen et al. 2015). The relative stability of the branches was evaluated by bootstrapping with 1000 replications. The isolate YTH-12 was placed in the same clade as S. vannaccii with 100% bootstrap support. Based on morphology and molecular analyses, this pathogen was identified as S. vannaccii. To satisfy Koch's postulates, the isolate YTH-12 was inoculated on leaves of C. crepidioides plants. Twenty punctured leaves and twenty unwounded leaves were inoculated with a 5-mm-diameter mycelial disc, respectively. Leaves inoculated with sterile PDA discs were used as blank controls. Plants were maintained in a growth chamber (25°C-28°C and relative humidity 80%-90%). Brown spots were observed on inoculated leaves (both punctured and unwounded) about 30 hours after inoculation and typical symptoms appeared about 55 hours after inoculation (Supplementary Fig. 1 d), and the diseased leaves produced black pycnidia and orange droplet 10 days after inoculation (Supplementary Fig. 1 e). All inoculated leaves developed symptoms similar to those on the naturally infected plants in the garden and the disease incidence reached 100%, whereas the control leaves remained symptomless (Supplementary Fig. 1 f). The same fungus was re-isolated from inoculated leaves. To our knowledge, this is the first report of S. vannaccii causing leaf spot on C. crepidioides in China. So far, Stagonosporopsis vannaccii has been reported as a plant pathogenic fungus only in Brazil, causing anthracnose symptoms on pods of soybean (Crous et al. 2019). Crassocephalum crepidioides is a widely distributed weed. If S. vannaccii has strong host specificity, it is possible to be used as a biocontrol fungus to control the weed. Conversely, if the fungus has a wider host range, C. crepidioides may act as a good bridge to spread the pathogen. This study helps to deepen the understanding of S. vannaccii and its associated plant diseases.
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Affiliation(s)
- YongLin He
- Guangxi UniversityNanning, China, 530004;
| | - Guangjie He
- Guangxi University, 12664, College of Agriculture, Nanning, Guangxi, China;
| | - Qi-Qin Li
- College of Agriculture, Guangxi University, xiu ling lu 75, Nanning, Guangxi, China, 530005;
| | | | - Gao-Qin Yuan
- Guangxi University, 100, Daxue RoadNanning, Guangxi, China, 530005;
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22
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Zou B, Zhao D, He G, Nian Y, Da D, Yan J, Li C. Acetylation and Phosphorylation of Proteins Affect Energy Metabolism and Pork Quality. J Agric Food Chem 2020; 68:7259-7268. [PMID: 32543862 DOI: 10.1021/acs.jafc.0c01822] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [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: 06/11/2023]
Abstract
Preslaughter handling has been shown to significantly affect meat quality, but the mechanisms are not fully understood. In this study, we investigated protein phosphorylation and acetylation in pig muscles at early postmortem time and their associations with meat quality attributes. Thirty pigs were randomly assigned to traditional (TH, n = 15) or mild handling (MH, n = 15). Compared with TH, MH reduced the incidence of pale, soft, and exudative (PSE) or dark, firm, and dry (DFD) pork. MH induced 65 and 20 peptides that match with 39 and 12 proteins to be more highly phosphorylated and acetylated, respectively. Creatine kinase, β-enolase, α-1,4-glucan phosphorylase, tropomyosin, and myosin heavy chain isoforms 1, 4, and 7 were found to be simultaneously phosphorylated and acetylated, which may involve glycolysis, tight junctions, and muscle contraction. The phosphorylation and acetylation levels of differential proteins showed significant correlations with meat quality traits. These findings indicate that preslaughter MH can improve meat quality by regulating protein phosphorylation and acetylation involving energy metabolism in muscle.
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Affiliation(s)
- Bo Zou
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MARA; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Di Zhao
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MARA; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Guangjie He
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MARA; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Yingqun Nian
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MARA; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Dandan Da
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MARA; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Jing Yan
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MARA; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Chunbao Li
- Key Laboratory of Meat Processing and Quality Control, MOE; Key Laboratory of Meat Processing, MARA; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China
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Ji L, Yang C, Li H, Yang N, Fu Y, Yang L, Wang Q, He G. A reactive probe for Co 2+ ion detection based on a catalytic decomposition process and its fluorescence imaging in living cells. LUMINESCENCE 2020; 36:4-10. [PMID: 32602606 DOI: 10.1002/bio.3909] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 06/22/2020] [Accepted: 06/25/2020] [Indexed: 01/19/2023]
Abstract
A novel reactive fluorescent probe for cobalt ions was prepared based on integration of thiourea functional groups, coumarin, and naphthalimide fluorophores. There was no fluorescence observed for the probe itself, however, in the presence of cobalt ions, catalytic decomposition occurred for the probe and coumarin molecular fragments were produced that emitted blue fluorescence. This enabled the probe to be used as a 'turn on' reagent for detection of cobalt ions. Under physiological pH conditions and in appropriate solvent systems, an obvious fluorescence enhancement for cobalt ions was observed in selective experiments. Competition experiments indicated that cobalt ions could still induce fluorescence enhancement in the presence of other metal ions. Sensitivity experiments showed that the detection limit for cobalt ions was 6.0 nM. Dynamics research demonstrated that the catalytic process was a pseudo-first-order reaction and the reaction constant (kobs ) was calculated to be 1.49 × 10-2 min-1 . In addition, the mechanism of catalytic decomposition could be demonstrated using electrospray ionization mass spectrometry and thin layer chromatography experiments. Cell fluorescence imaging experiments demonstrated that the probe could be used to detect cobalt ions in living HeLa cells.
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Affiliation(s)
- Liguo Ji
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, China
| | - Chengliang Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, China
| | - Huijie Li
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, China
| | - Nan Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, China
| | - Yutian Fu
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, China
| | - Linlin Yang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, China
| | - Qingzhi Wang
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, China
| | - Guangjie He
- Xinxiang Key Laboratory of Forensic Science Evidence, School of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang, Henan Province, China
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24
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Li X, Han Y, Sun S, Shan D, Ma X, He G, Mergu N, Park JS, Kim CH, Son YA. A diaminomaleonitrile-appended BODIPY chemosensor for the selective detection of Cu 2+ via oxidative cyclization and imaging in SiHa cells and zebrafish. Spectrochim Acta A Mol Biomol Spectrosc 2020; 233:118179. [PMID: 32120291 DOI: 10.1016/j.saa.2020.118179] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [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: 12/05/2019] [Revised: 02/11/2020] [Accepted: 02/19/2020] [Indexed: 06/10/2023]
Abstract
A specific Cu2+ sensor, 2-amino-3-(BODIPYmethyleneamino)maleonitrile (BDM), was established by a simple dehydration between BODIPY and diaminomaleonitrile. Cu2+ could be recognized by BDM over other competing metal ions in acetonitrile with distinct fluorescence emission signal response. Upon the addition of Cu2+ to BDM in acetonitrile, the maximum absorption at approximately 530 nm on the longer wavelength side was quenched, and the emission at 530 nm was ignited simultaneously. The fluorescence intensity enhancement could reach a maximum of 204 times the intensity of the BDM blank solution. The fluorescence "off-on" effect is established according to the Cu2+-induced fast intramolecular oxidative cyclization reaction, which could be deduced from the formation of an imidazole ring appended to the cyclization product (2-BODIPY-1H-imidazole-4,5-dicarbonitrile, BMC). Single-crystal structure analysis of the sensor BDM and cyclization product BMC further demonstrated this oxidative cyclization. Finally, the Cu2+ recognition property of BDM was validated in SiHa cells and living zebrafish. Additionally, the blood-brain barrier of the zebrafish can be penetrated by the BDM dye and the neuron cells in the brain were stained.
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Affiliation(s)
- Xiaochuan Li
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
| | - Yujie Han
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Saisai Sun
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Dandan Shan
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xiaoming Ma
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Guangjie He
- Department of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China
| | - Naveen Mergu
- BK21, Department of Advanced Organic Materials Engineering, Chungnam National University, Daejeon 34134, South Korea
| | - Jong-Su Park
- Department of Biology, Chungnam National University, Daejeon 34134, South Korea
| | - Cheol-Hee Kim
- Department of Biology, Chungnam National University, Daejeon 34134, South Korea
| | - Young-A Son
- BK21, Department of Advanced Organic Materials Engineering, Chungnam National University, Daejeon 34134, South Korea.
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Somphonsane R, Ramamoorthy H, He G, Nathawat J, Yin S, Kwan CP, Arabchigavkani N, Barut B, Zhao M, Jin Z, Fransson J, Bird JP. Universal scaling of weak localization in graphene due to bias-induced dispersion decoherence. Sci Rep 2020; 10:5611. [PMID: 32221340 PMCID: PMC7101405 DOI: 10.1038/s41598-020-62313-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 03/11/2020] [Indexed: 11/29/2022] Open
Abstract
The differential conductance of graphene is shown to exhibit a zero-bias anomaly at low temperatures, arising from a suppression of the quantum corrections due to weak localization and electron interactions. A simple rescaling of these data, free of any adjustable parameters, shows that this anomaly exhibits a universal, temperature- (T) independent form. According to this, the differential conductance is approximately constant at small voltages (V < kBT/e), while at larger voltages it increases logarithmically with the applied bias. For theoretical insight into the origins of this behaviour, which is inconsistent with electron heating, we formulate a model for weak-localization in the presence of nonequilibrium transport. According to this model, the applied voltage causes unavoidable dispersion decoherence, which arises as diffusing electron partial waves, with a spread of energies defined by the value of the applied voltage, gradually decohere with one another as they diffuse through the system. The decoherence yields a universal scaling of the conductance as a function of eV/kBT, with a logarithmic variation for eV/kBT > 1, variations in accordance with the results of experiment. Our theoretical description of nonequilibrium transport in the presence of this source of decoherence exhibits strong similarities with the results of experiment, including the aforementioned rescaling of the conductance and its logarithmic variation as a function of the applied voltage.
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Affiliation(s)
- R Somphonsane
- Department of Physics, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand.
- Thailand Center of Excellence in Physics, Commission on Higher Education, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand.
| | - H Ramamoorthy
- Department of Electronic Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand
| | - G He
- Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260-1900, USA
| | - J Nathawat
- Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260-1900, USA
| | - S Yin
- Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260-1900, USA
| | - C-P Kwan
- Department of Physics, University at Buffalo, The State University of New York, Buffalo, NY, 14260-1500, USA
| | - N Arabchigavkani
- Department of Physics, University at Buffalo, The State University of New York, Buffalo, NY, 14260-1500, USA
| | - B Barut
- Department of Physics, University at Buffalo, The State University of New York, Buffalo, NY, 14260-1500, USA
| | - M Zhao
- High-Frequency High-Voltage Device and Integrated Circuits Center, Institute of Microelectronics of Chinese Academy of Sciences, 3 Beitucheng West Road, Chaoyang District, Beijing, PR China
| | - Z Jin
- High-Frequency High-Voltage Device and Integrated Circuits Center, Institute of Microelectronics of Chinese Academy of Sciences, 3 Beitucheng West Road, Chaoyang District, Beijing, PR China
| | - J Fransson
- Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 21, Uppsala, Sweden
| | - J P Bird
- Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260-1900, USA
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Wang CH, Hou R, Wang M, He G, Li BG, Pan RL. Effects of wet atmospheric nitrogen deposition on epiphytic lichens in the subtropical forests of Central China: Evaluation of the lichen food supply and quality of two endangered primates. Ecotoxicol Environ Saf 2020; 190:110128. [PMID: 31891838 DOI: 10.1016/j.ecoenv.2019.110128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 12/18/2019] [Accepted: 12/21/2019] [Indexed: 06/10/2023]
Abstract
Over the last few decades, the threat posed to biodiversity and ecosystem function by atmospheric nitrogen (N) deposition has been increasingly recognized. The disturbed nutrient balance and species composition of plants induced by higher N deposition can impact the biodiversity of the organisms that consume the plants. In this research, we implemented several experiments to estimate the effects of increased N deposition on the growth, survival, and nutrients of the dominant epiphytic lichens in the subtropical mountains in Central China to assess the lichen food amount and nutritional quality for two endangered primates endemic to China. Our results indicated that the thallus growth and propagule survival of the lichens were significantly decreased when nitrogen addition changed from 6.25 to 50.0 kg N·ha-1·y-1; it was also shown that lichen biomass could be decreased by 11.2%-70.2% when the deposition addition exceeded 6.25 kg N·ha-1·y-1. Further, our study revealed that increased nitrogen deposition also reduced the nutritional quality of the lichens via reducing the soluble protein and soluble sugar levels and increasing the fiber content, which would substantially affect the diet selection of the plants consumers in the region, particularly the populations of the two lichen-eating endangered primate species, Rhinopithecus roxellana and R. bieti. Our experimental study suggested that the nitrogen pollution derived from anthropogenic activities could cause cascading effects for the whole forest ecosystem of Central China; thus, more studies about nitrogen deposition in this region are required.
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Affiliation(s)
- C H Wang
- Engineering Research Centre of Eco-Environment in the Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Daxue Road 8th, Yichang, Hubei Province, 443002, PR China; Hubei International Scientific and Technological Cooperation Centre of Ecological Protection and Management in the Three Gorges Area, China Three Gorges University, Daxue Road 8th, Yichang, Hubei Province, 443002, PR China.
| | - R Hou
- Department of Anthropology, McGill University, Montreal, QC, H3A 2T7, Canada; Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, 710069, PR China
| | - M Wang
- Engineering Research Centre of Eco-Environment in the Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Daxue Road 8th, Yichang, Hubei Province, 443002, PR China
| | - G He
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, 710069, PR China
| | - B G Li
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, 710069, PR China; Xi'an Branch of Chinese Academy of Sciences, Xi'an, 710043, PR China
| | - R L Pan
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, 710069, PR China; School of Human Sciences and Centre for Evolutionary Biology, School of Biological Sciences, The University of Western Australia, Perth, WA, 6009, Australia
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27
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Yang L, Li L, Li Y, Zheng H, Song H, Zhang H, Yang N, Ji L, Ma N, He G. A highly sensitive Ru( ii) complex-based phosphorescent probe for thiophenol detection with aggregation-induced emission characteristics. NEW J CHEM 2020. [DOI: 10.1039/c9nj05093k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel AIEE-active Ru(ii) based phosphorescent probe was designed for the detection of thiophenol in aqueous solution and on test paper.
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28
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Xu J, Liu T, Tang W, Chang W, Feng Q, Wei Y, Ren L, Ye Q, Cui Y, He G, Liu T, Zhu D, Ji M. Bevacizumab plus chemotherapy versus chemotherapy alone as first-line treatment for patients with RAS mutant unresectable colorectal liver-limited metastases: A single center randomized control trial. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz394.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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29
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Chang W, Liu T, Ye W, Ren L, He G, Xu J. Detection of 5-hydroxymethylcytosine in circulating-free DNA for prediction of the efficacy of conversion therapy for colorectal cancer liver metastases. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.106] [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: 11/14/2022] Open
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30
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He G, Hua X, Yang N, Li L, Xu J, Yang L, Wang Q, Ji L. Synthesis and application of a “turn on” fluorescent probe for glutathione based on a copper complex of coumarin hydrazide Schiff base derivative. Bioorg Chem 2019; 91:103176. [DOI: 10.1016/j.bioorg.2019.103176] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 07/26/2019] [Accepted: 07/28/2019] [Indexed: 02/08/2023]
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31
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Liu T, Chang W, Ye W, He G, Ren L, Tang W, Chen J, Xu J. Detection of 5-hydroxymethylcytosine in circulating-free DNA for early diagnosis of colorectal cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.105] [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: 11/13/2022] Open
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32
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Li Q, Luo H, Peng H, Zhong M, Liu X, Qiu D, Yang H, He Y, Li C, Yin L, Huang X, Tian X, He G, Wang Y, Jin F. Plan Quality Evaluation and Preliminary Application of a Novel Plan Difficulty Index in Radiotherapy of Lung Cancer. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Yang L, Liu Y, Li Y, Wang H, Zhang H, Xu J, Ji L, Wang Q, He G. A highly sensitive fluorescence probe for thiophenol in living cells via a substitution-cyclization strategy. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130538] [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] [Indexed: 01/23/2023]
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34
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Abstract
The H8 subtype viruses are rarely isolated from wild ducks. Shanghai is one of the important wintering or stopover sites on the East Asia-Australia Migration Flyway. An influenza virus, subtype H8N4, was firstly isolated from a common teal (Anas crecca) in Shanghai during 2017-2018 in this study. To clarify the genetic characteristics of the H8N4 virus, the whole genome sequences were analyzed. Phylogenetic analysis of the hemagglutinin and neuraminidase genes showed that they shared highest nucleotide identity (99.19%-99.64%) with the Japan duck-origin H8N4 virus collected in 2016 (A/duck/Aichi/231003/2016) and belonged to the Eurasian-like avian lineage. Six other genes of the H8N4 isolated virus were all highly similar to the corresponding genes of a wide range of AIV subtypes including H9N2, H5N7, H3N8, H1N2, H4N6 and H1N1. The results indicated that the H8N4 virus was a multiple reassortant virus. The study emphasized that the continuous surveillance of influenza virus in wild birds should be strengthened. Keywords: avian influenza virus; H8N4; phylogenetic analysis; Shanghai.
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35
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Du D, Liu M, Xing Y, Chen X, Zhang Y, Zhu M, Lu X, Zhang Q, Ling Y, Sang X, Li Y, Zhang C, He G. Semi-dominant mutation in the cysteine-rich receptor-like kinase gene, ALS1, conducts constitutive defence response in rice. Plant Biol (Stuttg) 2019; 21:25-34. [PMID: 30101415 DOI: 10.1111/plb.12896] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/04/2018] [Indexed: 06/08/2023]
Abstract
Plants have evolved a sophisticated two-branch defence system to prevent the growth and spread of pathogen infection. The novel Cys-rich repeat (CRR) containing receptor-like kinases, known as CRKs, were reported to mediate defence resistance in plants. For rice, there are only two reports of CRKs. A semi-dominant lesion mimic mutant als1 (apoptosis leaf and sheath 1) in rice was identified to demonstrate spontaneous lesions on the leaf blade and sheath. A map-based cloning strategy was used for fine mapping and cloning of ALS1, which was confirmed to be a typical CRK in rice. Functional studies of ALS1 were conducted, including phylogenetic analysis, expression analysis, subcellular location and blast resistance identification. Most pathogenesis-related (PR) genes and other defence-related genes were activated and up-regulated to a high degree. ALS1 was expressed mainly in the leaf blade and sheath, in which further study revealed that ALS1 was present in the vascular bundles. ALS1 was located in the cell membrane of rice protoplasts, and its mutation did not change its subcellular location. Jasmonic acid (JA) and salicylic acid (SA) accumulation were observed in als1, and enhanced blast resistance was also observed. The mutation of ALS1 caused a constitutively activated defence response in als1. The results of our study imply that ALS1 participates in a defence response resembling the common SA-, JA- and NH1-mediated defence responses in rice.
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Affiliation(s)
- D Du
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - M Liu
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - Y Xing
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - X Chen
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - Y Zhang
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - M Zhu
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - X Lu
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - Q Zhang
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - Y Ling
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - X Sang
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - Y Li
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - C Zhang
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
| | - G He
- Rice Research Institute, Key Laboratory of Application and Safety Control of Genetically Modified Crops, Academy of Agricultural Sciences, Southwest University, Chongqing, 400715, China
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36
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Zhao J, He G, Huang S, Villalobos LF, Dakhchoune M, Bassas H, Agrawal KV. Etching gas-sieving nanopores in single-layer graphene with an angstrom precision for high-performance gas mixture separation. Sci Adv 2019; 5:eaav1851. [PMID: 30746475 PMCID: PMC6357726 DOI: 10.1126/sciadv.aav1851] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 12/10/2018] [Indexed: 05/19/2023]
Abstract
One of the bottlenecks in realizing the potential of atom-thick graphene membrane for gas sieving is the difficulty in incorporating nanopores in an otherwise impermeable graphene lattice, with an angstrom precision at a high-enough pore density. We realize this design by developing a synergistic, partially decoupled defect nucleation and pore expansion strategy using O2 plasma and O3 treatment. A high density (ca. 2.1 × 1012 cm-2) of H2-sieving pores was achieved while limiting the percentage of CH4-permeating pores to 13 to 22 parts per million. As a result, a record-high gas mixture separation performance was achieved (H2 permeance, 1340 to 6045 gas permeation units; H2/CH4 separation factor, 15.6 to 25.1; H2/C3H8 separation factor, 38.0 to 57.8). This highly scalable pore etching strategy will accelerate the development of single-layer graphene-based energy-efficient membranes.
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Affiliation(s)
- J. Zhao
- Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion CH-1951, Switzerland
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
| | - G. He
- Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion CH-1951, Switzerland
| | - S. Huang
- Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion CH-1951, Switzerland
| | - L. F. Villalobos
- Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion CH-1951, Switzerland
| | - M. Dakhchoune
- Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion CH-1951, Switzerland
| | - H. Bassas
- Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion CH-1951, Switzerland
| | - K. V. Agrawal
- Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion CH-1951, Switzerland
- Corresponding author.
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37
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Fan JG, Chen L, Li JX, Gu QJ, Li DB, Zhao LB, He G. [The treatment of nose-eye correlated diseases with external nasal incision combined with nasal cavity approach surgery through endoscope]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 30:1210-1214. [PMID: 29798331 DOI: 10.13201/j.issn.1001-1781.2016.15.008] [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] [Received: 11/22/2015] [Indexed: 11/12/2022]
Abstract
Objective:To explore the indications and characteristics for the treatment of nose-eye correlated diseases with endoscopic surgery through external nasal incision combined with nasal cavity approach.Method:The clinical data of 13 patients whom hospitalized in our department and treated by endoscopic surgery through external nasal incision combined with nasal cavity approach since October 2011, were retrospectively analyzed and the characteristics of different pathological changes, clinical manifestations, surgical approach and follow-up results were summarized.Four cases of patients underwent endoscopic surgery through nasal cavity and lacrimal caruncle conjunctival incision, 4 cases received bone fracture reduction and DCR with endoscope through double path of nasal cavity and the original trauma wound, 2 cases with endoscopic bone tumor resection through nasal cavity and external nasal incision, the rest of the 3 cases with endonasal endoscopic and peri-orbit incision surgery.Result:Two cases of tumor patients showed no recurrence followed up for 1.5 to 2 years; the diplopia disappeared in 2 cases of orbital medial wall fracture; surgeries of 4 cases of orbital wall fracture with lacrimal duct obstruction patients, 3 cases succeeded, 1 case failed and change into dacryocystorhinotomy with external nasal incision, and epiphora of all patients vanished; all of the patients of sinus osteoma, foreign bodies and abscess were cured and symptoms disappeared; the symptoms of ectopic meningioma patient gradually died down with eyebrow scars left.Conclusion:The surgery with external nasal incision combined with nasal cavity approach through endoscope to treat noseeye correlated diseases can effectively deal with relevant pathological changes, with the advantages of clear operation field and less damage, but its exact indications and surgical methods still need to be further explored.
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Affiliation(s)
- J G Fan
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - L Chen
- Department of Ophthalmology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital
| | - J X Li
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - Q J Gu
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - D B Li
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - L B Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - G He
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
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38
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Shi M, Yu X, Wang L, Dai F, He G, Li Q. Reaction Equilibrium and Kinetics of Synthesis of Polyoxymethylene Dimethyl Ethers from Formaldehyde and Methanol. Kinet Catal 2018. [DOI: 10.1134/s0023158418030199] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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He G, Liu X, Xu J, Ji L, Yang L, Fan A, Wang S, Wang Q. Synthesis and application of a highly selective copper ions fluorescent probe based on the coumarin group. Spectrochim Acta A Mol Biomol Spectrosc 2018; 190:116-120. [PMID: 28918220 DOI: 10.1016/j.saa.2017.09.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [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: 07/12/2017] [Revised: 08/18/2017] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
A highly selective copper ions fluorescent probe based on the coumarin-type Schiff base derivative 1 (probe) was produced by condensation reaction between coumarin carbohydrazide and 1H-indazole-3-carbaldehyde. The UV-vis spectroscopy showed that the maximum absorption peak of compound 1 appeared at 439nm. In the presence of Cu2+ ions, the maximum peak decreased remarkably compared with other physiological important metal ions and a new absorption peak at 500nm appeared. The job's plot experiments showed that complexes of 1:2 binding mode were formed in CH3CN:HEPES (3:2, v/v) solution. Compound 1 exhibited a strong blue fluorescence. Upon addition of copper ions, the fluorescence gradually decreased and reached a plateau with the fluorescence quenching rate up to 98.73%. The detection limit for Cu2+ ions was estimated to 0.384ppm. Fluorescent microscopy experiments demonstrated that probe 1 had potential to be used to investigate biological processes involving Cu2+ ions within living cells.
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Affiliation(s)
- Guangjie He
- Department of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China.
| | - Xiangli Liu
- Department of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Jinhe Xu
- Department of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Liguo Ji
- Department of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China.
| | - Linlin Yang
- Department of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Aiying Fan
- Department of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
| | - Songjun Wang
- Hebei Key Laboratory of Forensic Medicine, Hebei Medical University, East Zhongshan Road No. 361, Shijiazhuang 050017, Hebei Province, PR China
| | - Qingzhi Wang
- Department of Forensic Medicine, Xinxiang Medical University, Jinsui Road No. 601, Xinxiang 453003, Henan Province, PR China
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40
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Wang Y, Meng Q, Han Q, He G, Hu Y, Feng H, Jia H, Zhang R, Zhang Z. Selective and sensitive detection of cysteine in water and live cells using a coumarin–Cu2+ fluorescent ensemble. NEW J CHEM 2018. [DOI: 10.1039/c8nj03809k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A coumarin–Cu2+ ensemble based fluorescent chemosensor was developed for the selective detection of cysteine in aqueous media and live cells.
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Affiliation(s)
- Yue Wang
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
| | - Qingtao Meng
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
- Key Laboratory for Functional Material
| | - Qian Han
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
| | - Guangjie He
- Department of Forensic Medicine
- Xinxiang Medical University
- XinXiang
- P. R. China
| | - Yaoyun Hu
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
| | - Huan Feng
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
| | - Hongmin Jia
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
| | - Run Zhang
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Zhiqiang Zhang
- Key Laboratory for Functional Material
- Educational Department of Liaoning Province
- University of Science and Technology Liaoning
- Anshan 114051
- P. R. China
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41
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Abstract
The total syntheses of teixobactin and a series of its stereoisomers at positions 2, 5, 6, 10 and 11 were achieved via a combined strategy of solution and solid phase peptide synthesis.
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Affiliation(s)
- L. Liu
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - S. Wu
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Q. Wang
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - M. Zhang
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - B. Wang
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - G. He
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - G. Chen
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
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42
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He G, Liu C, Liu X, Wang Q, Fan A, Wang S, Qian X. Design and synthesis of a fluorescent probe based on naphthalene anhydride and its detection of copper ions. PLoS One 2017; 12:e0186994. [PMID: 29073217 PMCID: PMC5658116 DOI: 10.1371/journal.pone.0186994] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 10/11/2017] [Indexed: 11/18/2022] Open
Abstract
Copper, as the third most abundant transition metal ions of human, plays an essential role in the redox reaction, signal transduction, hematopoiesis, and other physiological processes. Abnormal content of copper ions in the body will cause some diseases such as anemia, coronary heart disease, Menkes’ syndrome. In this article, a new fluorescence probe L for Cu2+ was designed and synthetized by using 4-bromo-1,8 naphthalene anhydride and 2-thiophene formaldehyde as raw materials. Fluorescent probe L itself exhibited strong fluorescence, upon the addition of Cu2+ ions, the fluorescence was quenched. The fluorescent detection limit for Cu2+ ions was determined to be 1.8 μM based on a 3δ/S method. UV-vis absorption and fluorescence spectra indicated that probe L showed good selectivity and sensitivity for Cu2+, and this selectivity was not interfered by other metal ions and anions. Further cell fluorescence imaging experiments indicated that the probe L had potential to be used to examine copper ions in vivo.
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Affiliation(s)
- Guangjie He
- Department of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan Province, P. R. China
- * E-mail: (GJH); (XLQ)
| | - Chenxi Liu
- Department of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan Province, P. R. China
| | - Xiaobo Liu
- Department of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan Province, P. R. China
| | - Qingzhi Wang
- Department of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan Province, P. R. China
| | - Aiying Fan
- Department of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan Province, P. R. China
| | - Songjun Wang
- Hebei Key Laboratory of Forensic Medicine, Hebei Medical University, Shijiazhuang, Hebei Province, P. R. China
| | - Xinlai Qian
- School of Basic Medical Science, Xinxiang Medical University, Xinxiang, Henan Province, P. R. China
- * E-mail: (GJH); (XLQ)
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43
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Mehinto AC, VanDervort DR, Lao W, He G, Denison MS, Vliet SM, Volz DC, Mazor RD, Maruya KA. High throughput in vitro and in vivo screening of inland waters of Southern California. Environ Sci Process Impacts 2017; 19:1142-1149. [PMID: 28612856 DOI: 10.1039/c7em00170c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The impact of unmonitored contaminants, also known as contaminants of emerging concern (CECs), on freshwater streams remains largely uncharacterized. Water samples from 31 streams representing urban, agricultural and undeveloped (i.e., open space) land use in Southern California (USA) were analyzed for in vitro and in vivo bioactivity. The extent and magnitude of bioactivity screened using endocrine-responsive cell bioassays and a fish embryo screening assay were low. In contrast, a wider gradient of responses for the aryl hydrocarbon receptor (AhR) assay was observed, which was negatively correlated with a measure of benthic community structure. Both aromatic and non-aromatic CECs were tentatively identified in these samples, but polycyclic aromatic hydrocarbons (PAHs), known AhR agonists in urban environments, were not present at detectable levels. These results suggest that a combination of in vitro and in vivo show potential as screening techniques for biological condition in situ, but that more advanced, comprehensive analytical methods are needed to identify bioactive contaminants.
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Affiliation(s)
- A C Mehinto
- Southern California Coastal Water Research Project, Costa Mesa, CA, USA
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Tang YK, He G, Fan JG, Zhu W. [The study of locating facial nerve precisely in middle ear surgery based on clinical anatomy]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:1334-1337. [PMID: 29798225 DOI: 10.13201/j.issn.1001-1781.2017.17.009] [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] [Received: 06/18/2017] [Indexed: 11/12/2022]
Abstract
Objective:To investigate the methods of locating facial nerve precisely in middle ear surgery through the observation and measurement of the facial nerve and surrounding anatomical structures and to provide reference for the middle ear surgery.Method:Combined surgical approach on 15 cases (30 sides) fresh adult cadaveric specimens were dissected, observed the characteristics of facial nerve and its shape and spatial relationship of the surrounding structures, and measured the distance between the facial nerve and its surrounding structures.Result:The shortest distance from the midpoint of the posterior wall of external auditory canal (annulus level) to the vertical segment of the facial nerve was (3.37±0.34)mm, the shortest distance from the leading edge of the sigmoid sinus to the vertical segment of facial nerve was (7.40±0.71)mm, the shortest distance from the lateral margin of jugular bulb to the facial nerve was (5.58±0.79)mm, the shortest distance from Henle crest to the pyramidal segment of facial nerve was (12.76±1.24)mm, the shortest distance between the pyramidal segment of facial nerve and the posterior short limb of incus was (1.56±0.35)mm, the shortest distance between the pyramidal segment of facial nerve and the lower edge of posterior semicircular canal was (2.56±0.41) mm, the shortest distance between the lower edge of horizontal semicircular canal and the horizontal segment of facial nerve was (1.28±0.32) mm, the shortest distance between the upper edge of vestibular window and the horizontal segment of facial nerve was (0.67±0.15)mm.Conclusion:A good command of the anatomy of temporal bone as well as the methods of locating facial nerve will provide the key to reduce the probability of iatrogenic facial nerve injury in middle ear surgery.
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Affiliation(s)
- Y K Tang
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Provincial People's Hospital, the Affiliated Hospital, University of Electronic Science and Technology of China, Chengdu, 610000, China
| | - G He
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Provincial People's Hospital, the Affiliated Hospital, University of Electronic Science and Technology of China, Chengdu, 610000, China
| | - J G Fan
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Provincial People's Hospital, the Affiliated Hospital, University of Electronic Science and Technology of China, Chengdu, 610000, China
| | - W Zhu
- Department of Anatomy, West China Medical College of Sichuan University
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45
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He G, Yang L, Qian X, Li J, Yuan Z, Li C. A coumarin-based fluorescence resonance energy transfer probe targeting matrix metalloproteinase-2 for the detection of cervical cancer. Int J Mol Med 2017; 39:1571-1579. [DOI: 10.3892/ijmm.2017.2974] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 04/27/2017] [Indexed: 11/06/2022] Open
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46
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Yan L, He G, Zhou X, Zheng Y, Zhu Y, Yang J, Zhang M, Zhou Y. Contrast-enhanced ultrasound in the diagnosis of orbital space-occupying lesions. Clin Radiol 2017; 72:798.e1-798.e6. [PMID: 28464984 DOI: 10.1016/j.crad.2017.03.026] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/22/2017] [Accepted: 03/30/2017] [Indexed: 12/29/2022]
Abstract
AIM To summarise the sonographic findings and assess the feasibility of contrast-enhanced ultrasound (CEUS) as an imaging method for the diagnosis of orbital space-occupying lesions. MATERIALS AND METHODS This was a prospective study of 53 patients who underwent orbital ultrasound at Xijing Hospital. Two-dimensional ultrasound, colour Doppler flow imaging (CDFI), and CEUS imaging were obtained and compared in patients with orbital haemangioma, pseudotumour, melanoma of the choroid, and retinoblastoma. RESULTS CEUS imaging cannot only visualise the location, shape, border, acoustic properties of a lesion, and interactions between the lesion and surrounding tissues, but also display the microvasculature and tissue perfusion within the lesion. The information obtained from CEUS imaging is valuable for diagnosis and differential diagnosis of orbital space-occupying lesions. CONCLUSION CEUS imaging allowed better visualisation of the lesions, enabled detection of vascular changes, increased the signal-to-noise ratio, and increased the sensitivity of detection of changes in perfusion in the microcirculation. It has relatively high sensitivity and specificity in the diagnosis of orbital space-occupying lesions and increases the accuracy of diagnosis.
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Affiliation(s)
- L Yan
- Department of Ultrasonography, Xijing Hospital, The Fourth Military Medical University, No. 17 West Changle Road, Xi'an 710032, China; Department of Ultrasonography, Xi'an Central Hospital, The Third Affiliated Hospital of JiaoTong University, No. 185 Houzai Gate, Xi'an 710003, China
| | - G He
- Department of Ultrasonography, Xijing Hospital, The Fourth Military Medical University, No. 17 West Changle Road, Xi'an 710032, China
| | - X Zhou
- Department of Ultrasonography, Xijing Hospital, The Fourth Military Medical University, No. 17 West Changle Road, Xi'an 710032, China.
| | - Y Zheng
- Department of Ultrasonography, Xi'an Central Hospital, The Third Affiliated Hospital of JiaoTong University, No. 185 Houzai Gate, Xi'an 710003, China
| | - Y Zhu
- Department of Ultrasonography, Xi'an Central Hospital, The Third Affiliated Hospital of JiaoTong University, No. 185 Houzai Gate, Xi'an 710003, China
| | - J Yang
- Department of CT & MRI, Xi'an Central Hospital, The Third Affiliated Hospital of JiaoTong University, No. 185 Houzai Gate, Xi'an 710003, China
| | - M Zhang
- Department of Ultrasonography, Xijing Hospital, The Fourth Military Medical University, No. 17 West Changle Road, Xi'an 710032, China
| | - Y Zhou
- Department of Ultrasonography, Xi'an Central Hospital, The Third Affiliated Hospital of JiaoTong University, No. 185 Houzai Gate, Xi'an 710003, China
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Zhang H, He G, Kong Y, Chen Y, Wang B, Sun X, Jia B, Xie X, Wang X, Chen D, Wei L, Zhang M, Zeng H, Chen H. Tumour-activated liver stromal cells regulate myeloid-derived suppressor cells accumulation in the liver. Clin Exp Immunol 2017; 188:96-108. [PMID: 28019655 DOI: 10.1111/cei.12917] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2016] [Indexed: 12/13/2022] Open
Abstract
Regulating mechanisms underlying hepatic myeloid-derived suppressor cell (MDSC) accumulation remain to be described. Here, we provide evidence for the involvement of tumour-activated liver stromal cells in the process of hepatic MDSCs migration and accumulation. Our data showed an elevated frequency of MDSCs in the liver of tumour-bearing mice. Moreover, tumour-activated liver stromal cells promote MDSC migration into the liver site. Further investigation indicated higher levels of cytokine and chemokine expression in liver stromal cells after exposure to the tumour-conditioned supernatant. Notably, the expression levels of proinflammatory factors, mainly including macrophage colony stimulating factor (M-CSF), transforming growth factor-β (TGF-β), monocyte chemotactic protein-1 (MCP-1) and stromal-derived factor-1 (SDF-1), increased after treatment with tumour-conditioned supernatant, and blockade of MCP-1 or SDF-1 decreased the proportion of tumour infiltrated MDSCs in mice co-transplanted with liver stromal cells and tumour cells, but not in mice with only tumour cells injection. These findings demonstrate that tumour-activated liver stromal cells produce higher levels of chemokines and cytokines, which may contribute to MDSC accumulation into the liver site in patients with liver cancer.
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Affiliation(s)
- H Zhang
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing, China.,Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China.,Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Emerging Infectious Diseases, Beijing, China
| | - G He
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing, China.,Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - Y Kong
- Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Emerging Infectious Diseases, Beijing, China
| | - Y Chen
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing, China.,Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - B Wang
- Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Emerging Infectious Diseases, Beijing, China
| | - X Sun
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing, China.,Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - B Jia
- Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Emerging Infectious Diseases, Beijing, China
| | - X Xie
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing, China.,Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - X Wang
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing, China.,Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - D Chen
- Institute of Immunology, Tsinghua University School of Medicine, Beijing, China
| | - L Wei
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing, China.,Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - M Zhang
- Institute of Immunology, Tsinghua University School of Medicine, Beijing, China
| | - H Zeng
- Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Emerging Infectious Diseases, Beijing, China
| | - H Chen
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing, China.,Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
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48
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Zheng Z, Zhang P, He G, Liao K, Wang Z, Pan J, Du K, Du J, Li BA. Simultaneous detection of 45 fusion genes in leukemia by dual-color fluorescence real-time PCR. Int J Lab Hematol 2017; 39:175-184. [PMID: 28133905 DOI: 10.1111/ijlh.12600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 10/03/2016] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Detection of recurrent genetic abnormalities is of great significance for a refined diagnosis and assessment of prognosis in leukemia. Conventional nested reverse transcription PCR is labor intensive and time-consuming. METHODS We have developed a novel dual-color TaqMan probe-based real-time PCR method for the simultaneous screening of 45 fusion transcripts in 12 parallel reactions. The method was tested and validated with cell lines carrying known fusion transcripts and patient samples. RESULTS A multiplex real-time PCR method was successfully developed for rapid detection of 45 fusion genes and validated for 15 of the more commonly detected fusion genes. Intra-assay reproducibility assessed for the most frequent rearrangements ranged from 0.41% to 0.74% for the coefficient of variation (CV) of cycle threshold (Ct) and the interassay reproducibility ranged from 1.62% to 2.83% in five separate experiments. The lowest detection limit for the translocations tested ranged between 1 : 16 000 and 1 : 32 000. Validation of the method with 213 patient samples showed 100% specificity and excellent consistence with conventional nested RT-PCR. CONCLUSION Overall, we believe that this method is easily applicable, cost-effective, and clinically useful for a rapid screening of fusion genes in the initial diagnostic phase of leukemia. Its use can also be extended to the monitoring of minimal residual disease.
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Affiliation(s)
- Z Zheng
- School of Life Sciences, Xiamen University, Xiamen, China
| | - P Zhang
- Shanghai Tissuebank Biotechnology Co., Ltd, Shanghai, China
| | - G He
- Shanghai Tissuebank Biotechnology Co., Ltd, Shanghai, China
| | - K Liao
- Shanghai Tissuebank Biotechnology Co., Ltd, Shanghai, China
| | - Z Wang
- Shanghai Tissuebank Biotechnology Co., Ltd, Shanghai, China
| | - J Pan
- Shanghai Tissuebank Biotechnology Co., Ltd, Shanghai, China
| | - K Du
- Shanghai Tissuebank Biotechnology Co., Ltd, Shanghai, China
| | - J Du
- Shanghai Tissuebank Biotechnology Co., Ltd, Shanghai, China
| | - B-A Li
- School of Life Sciences, Xiamen University, Xiamen, China
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49
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Fan JG, Lin W, Chen L, Li JX, Gu QJ, Li DB, Zhao LB, He G. [Endonasal endoscopic surgery in treatment of medial recus muscle entrapment: the management and effectiveness]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1630-1633. [PMID: 29871160 DOI: 10.13201/j.issn.1001-1781.2016.20.012] [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] [Received: 04/25/2016] [Indexed: 11/12/2022]
Abstract
Objective:To explore the indications , surgery method and effect for the treatment of medial rectus muscle entrapment with endoscopic surgery.Method: Eight medial rectus muscle entrapment patients were enrolled in this study,3 cases underwent obital medial wall fracture reposition and medial rectus muscle adhesion decomposition surgery through endonasal endoscope,and 5 cases received obital medial wall fracture reposition surgery with endoscope through nasal cavity and lacrimal caruncle conjunctival incision. Result:The diplopia disappeared and eyeball abduction function recovered in 6 cases of medial rectus muscle entrapment patients within 2 months,and 1 case with each surgery had mild diplopia and eyeball incomplete abduction left.Conclusion:Adopting endonasal endoscopic surgery or dual approaches surgery with endonasal endoscopic and transcaruncular surgery were ideal methods for medial rectus muscle entrapment diseases.Surgery with endoscope has the characteristics of clear field and less damage.The surgery should be performed whithin 3 weeks, and the entrapment of medial rectus muscle can be resoved effectively.
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Affiliation(s)
- J G Fan
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - W Lin
- Department of Ophthalmology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital
| | - L Chen
- Department of Ophthalmology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital
| | - J X Li
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - Q J Gu
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - D B Li
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - L B Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
| | - G He
- Department of Otorhinolaryngology Head and Neck Surgery, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital,Chengdu,610072,China
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He G, Ramamoorthy H, Kwan CP, Lee YH, Nathawat J, Somphonsane R, Matsunaga M, Higuchi A, Yamanaka T, Aoki N, Gong Y, Zhang X, Vajtai R, Ajayan PM, Bird JP. Thermally Assisted Nonvolatile Memory in Monolayer MoS 2 Transistors. Nano Lett 2016; 16:6445-6451. [PMID: 27680095 DOI: 10.1021/acs.nanolett.6b02905] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate a novel form of thermally-assisted hysteresis in the transfer curves of monolayer MoS2 FETs, characterized by the appearance of a large gate-voltage window and distinct current levels that differ by a factor of ∼102. The hysteresis emerges for temperatures in excess of 400 K and, from studies in which the gate-voltage sweep parameters are varied, appears to be related to charge injection into the SiO2 gate dielectric. The thermally-assisted memory is strongly suppressed in equivalent measurements performed on bilayer transistors, suggesting that weak screening in the monolayer system plays a vital role in generating its strongly sensitive response to the charge-injection process. By exploiting the full features of the hysteretic transfer curves, programmable memory operation is demonstrated. The essential principles demonstrated here point the way to a new class of thermally assisted memories based on atomically thin two-dimensional semiconductors.
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Affiliation(s)
- G He
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
| | - H Ramamoorthy
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
| | - C-P Kwan
- Department of Physics, University at Buffalo, The State University of New York , Buffalo, New York 14260-1500, United States
| | - Y-H Lee
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
| | - J Nathawat
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
| | - R Somphonsane
- Department of Physics, King Mongkut's Institute of Technology Ladkrabang , Bangkok 10520, Thailand
| | - M Matsunaga
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - A Higuchi
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - T Yamanaka
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - N Aoki
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Y Gong
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - X Zhang
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - R Vajtai
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - P M Ajayan
- Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - J P Bird
- Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260-1900, United States
- Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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