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Liang YG, Lee S, Yu HS, Zhang HR, Liang YJ, Zavalij PY, Chen X, James RD, Bendersky LA, Davydov AV, Zhang XH, Takeuchi I. Tuning the hysteresis of a metal-insulator transition via lattice compatibility. Nat Commun 2020; 11:3539. [PMID: 32669544 PMCID: PMC7363867 DOI: 10.1038/s41467-020-17351-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 06/17/2020] [Indexed: 11/28/2022] Open
Abstract
Structural phase transitions serve as the basis for many functional applications including shape memory alloys (SMAs), switches based on metal-insulator transitions (MITs), etc. In such materials, lattice incompatibility between transformed and parent phases often results in a thermal hysteresis, which is intimately tied to degradation of reversibility of the transformation. The non-linear theory of martensite suggests that the hysteresis of a martensitic phase transformation is solely determined by the lattice constants, and the conditions proposed for geometrical compatibility have been successfully applied to minimizing the hysteresis in SMAs. Here, we apply the non-linear theory to a correlated oxide system (V1−xWxO2), and show that the hysteresis of the MIT in the system can be directly tuned by adjusting the lattice constants of the phases. The results underscore the profound influence structural compatibility has on intrinsic electronic properties, and indicate that the theory provides a universal guidance for optimizing phase transforming materials. The effect of the lattice degrees of freedom on the metal-insulator transition of VO2 remains a topic of debate. Here the authors show that the lattice compatibility of the high temperature tetragonal phase and the low-temperature monoclinic phase strongly influences the electronic transition, as manifested in the tunability of its hysteresis via chemical substitution.
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Affiliation(s)
- Y G Liang
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - S Lee
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.,Department of Physics, Pukyong National University, Busan, 48513, South Korea
| | - H S Yu
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - H R Zhang
- Theiss Research, Inc, La Jolla, CA, 92037, USA.,Material Science and Engineering Division, Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - Y J Liang
- Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20742, USA
| | - P Y Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, 20742, USA
| | - X Chen
- Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - R D James
- Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN, 55455, USA
| | - L A Bendersky
- Theiss Research, Inc, La Jolla, CA, 92037, USA.,Material Science and Engineering Division, Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - A V Davydov
- Material Science and Engineering Division, Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - X H Zhang
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
| | - I Takeuchi
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA. .,Maryland Quantum Materials Center, University of Maryland, College Park, MD, 20742, USA.
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Jia FQ, Liang YG, Zhang XY, Luo FL, Xiong YH, Cheng LL, Liu JH. Characteristics of Pattern Visual Evoked Potential in Two Eyes with Varying Visual Acuity in One Eye and Forensic Application. Curr Med Sci 2018; 38:342-348. [PMID: 30074195 DOI: 10.1007/s11596-018-1885-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 02/25/2018] [Indexed: 11/29/2022]
Abstract
In this study, we aimed to study the pattern visual evoked potentials (P-VEPs) in two eyes with varying visual acuity in one eye and to provide an objective estimation of visual acuity by comparing P-VEPs in one and two eyes. Thirty subjects were chosen, who had one eye with an acuity of 5.0, 4.85, 4.6, 4.0, or scieropia and obstructed vision and the other eye with an acuity of 5.0, respectively. P-VEPs were detected under the large grating stimuli at 3×4 spatial frequency, moderate grating stimuli (12×16 spatial frequency) and small grating stimuli (48×64 spatial frequency). Under large grating stimuli, there was no significant difference in P100 peak latency between the groups, nor was there a significant difference between the amplitude of two eyes and the amplitude of one normal-vision eye. Under moderate and small grating stimuli, there was a significant difference in P100 peak latency between the group with both eyes having an acuity of 5.0 and the group with visual acuity below 4.0 in one eye. There was a significant difference in P100 amplitude between the group with visual acuity of 5.0 in both eyes and the group with one normal-vision eye. There was no significant difference in the amplitude of two eyes and the amplitude of one normal-vision eye between any other two groups. In forensic identification, characteristics and variability of P-VEPs in one and two eyes can be used to identify malingering or decline in visual acuity.
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Affiliation(s)
- Fu-Quan Jia
- School of Forensic Medicine, China Medical University, Shenyang, 110122, China.,Department of Forensic Medicine, Inner Mongolia Medical University, Hohhot, 010059, China
| | - Yu-Guang Liang
- School of Forensic Medicine, China Medical University, Shenyang, 110122, China.,Beijing Scales Forensic Center, Beijing, 100025, China
| | - Xin-Yuan Zhang
- School of Forensic Medicine, China Medical University, Shenyang, 110122, China
| | - Fang-Liang Luo
- School of Forensic Medicine, China Medical University, Shenyang, 110122, China
| | - Yan-He Xiong
- School of Forensic Medicine, China Medical University, Shenyang, 110122, China
| | - Long-Long Cheng
- School of Forensic Medicine, China Medical University, Shenyang, 110122, China
| | - Ji-Hui Liu
- School of Forensic Medicine, China Medical University, Shenyang, 110122, China.
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Li L, Shi QG, Lin F, Liang YG, Sun LJ, Mu JS, Wang YG, Su HB, Xu B, Ji CC, Huang HH, Li K, Wang HF. Cytokine IL-6 is required in Citrobacter rodentium infection-induced intestinal Th17 responses and promotes IL-22 expression in inflammatory bowel disease. Mol Med Rep 2014; 9:831-6. [PMID: 24430732 DOI: 10.3892/mmr.2014.1898] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 11/25/2013] [Indexed: 01/04/2023] Open
Abstract
Citrobacter rodentium (C. rodentium) infection is a widely used murine model to mimic human enteric bacteria infection and inflammatory bowel disease (IBD). In this model, interleukin (IL)‑17A plays critical roles in increasing chemokine and cytokine production in various tissues to recruit innate cells, including monocytes and neutrophils, to the local site of infection. However, the source of IL‑17A remains unclear, as the majority of cell types produce IL‑17A, including intestinal endothelium cells, innate immune cells and CD4+ T cells in disease development. In the current study, wild‑type B6 mice were treated with C. rodentium and the CD4+ Th17 cell subset was observed as being specifically increased in Peyer's patches (PP), but not in mesenteric draining lymph nodes. Furthermore, the research suggested that the differentiation and activation of Th17 cells in PP were dependent on the inflammatory cytokine IL‑6, as blocking IL‑6 signaling with neutralizing antibodies decreased Th17 cells and resulted in the mice being more susceptible to C. rodentium infection. These results confirmed that the Th17 cell subset was specifically activated in PP and demonstrated that IL‑6 is required in Th17 cell activation, which are important to the clinical treatment of IBD.
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Affiliation(s)
- Lei Li
- The Medical College of Chinese PLA and PLA General Hospital, Beijing 100853, P.R. China
| | - Qing-Guo Shi
- Department of Biotechnology, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Fang Lin
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Yu-Guang Liang
- Department of Pharmacology, Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Li-Jian Sun
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Jin-Song Mu
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Yong-Gang Wang
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Hai-Bin Su
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Biao Xu
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Cheng-Cheng Ji
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Hui-Huang Huang
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Ke Li
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
| | - Hui-Fen Wang
- Department of Intensive Care Unit, The 302 Military Hospital, Beijing 100039, P.R. China
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Hao GT, Zhou HY, Gao HZ, Qu HY, Liang YG, Li YY, Dong RH, Zhang LJ, Wang XF, Liu ZY. Pharmacokinetics of oxycodone hydrochloride and three of its metabolites after intravenous administration in Chinese patients with pain. Pharmacol Rep 2014; 66:153-8. [DOI: 10.1016/j.pharep.2013.08.012] [Citation(s) in RCA: 11] [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: 10/23/2012] [Revised: 07/29/2013] [Accepted: 08/13/2013] [Indexed: 11/29/2022]
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Hao GT, Chen Y, Dong RH, Qu HY, Liang YG, Li YY, Zheng ZJ, Gao HZ, Liu ZY. Simultaneous Determination of Hydrocodone, and Its Two Metabolites in Human Plasma by HPLC–MS–MS. Chromatographia 2011. [DOI: 10.1007/s10337-011-2118-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yu ZY, Liang YG, Xiao H, Shan YJ, Dong B, Huang R, Fu YL, Zhao ZH, Liu ZY, Zhao QS, Wang SQ, Chen JP, Mao BZ, Cong YW. Melissoidesin G, a diterpenoid purified fromIsodon melissoides, induces leukemic-cell apoptosis through induction of redox imbalance and exhibits synergy with other anticancer agents. Int J Cancer 2007; 121:2084-2094. [PMID: 17640057 DOI: 10.1002/ijc.22945] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Melissoidesin G (MOG) is a new diterpenoid purified from Isodon melissoides, a plant used in Chinese traditional medicine as antitumor and anti-inflammatory agents. In our study, MOG was shown to specifically inhibit the growth of human leukemia cell lines and primary acute myeloid leukemia (AML) blasts via induction of apoptosis, with the evidence of mitochondrial DeltaPsim loss, reactive oxygen species production, caspases activation and nuclear fragmentation. Furthermore, it was shown that thiol-containing antioxidants completely blocked MOG-induced mitochondrial DeltaPsim loss and subsequent cell apoptosis, while the inhibition of apoptosis by benzyloxy-carbonyl-Val-Ala-Asp-fluoromethylketone only partially attenuated mitochondrial DeltaPsim loss, indicating that MOG-induced redox imbalance is an early event upstream to mitochondrial DeltaPsim loss and caspase-3 activation. Consistently, it was found that MOG rapidly decreased the intracellular glutathione (GSH) content in a dose-dependent manner and the significance of GSH depletion in MOG-induced apoptosis was further supported by the protective effects of tert-butylhydroquinone (tBHQ) and the facilitative effects of DL-buthionine (S,R)-sulfoximine (BSO). Furthermore, it was showed that GSH depletion induced by MOG rendered some leukemia cell lines more sensitive to arsenic trioxide (As2O3), doxorubicin or cisplatin. Additionally, the synergistic apoptotic effects of MOG with As2O3 were detected in HL-60 and primary AML cells, but not in normal cells, suggesting the selective toxicity of their combination to the malignant cells. Together, we proposed that MOG alone or administered with other anticancer agents may provide a novel therapeutic strategy for leukemia.
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Affiliation(s)
- Zu-Yin Yu
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Yu-Guang Liang
- Department of Clinical Pharmacology, Beijing 307 Hospital, Academy of Medical Sciences, Beijing, China
| | - He Xiao
- Department of Molecular Immunology, Institute of Basic Medical Sciences, Beijing, China
| | - Ya-Jun Shan
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Bo Dong
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Rui Huang
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Ya-Li Fu
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Zhen-Hu Zhao
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Ze-Yuan Liu
- Department of Clinical Pharmacology, Beijing 307 Hospital, Academy of Medical Sciences, Beijing, China
| | - Qin-Shi Zhao
- Department of Phytochemisty, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Sheng-Qi Wang
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Jia-Pei Chen
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Bing-Zhi Mao
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Yu-Wen Cong
- Department of Pathophysiology, Beijing Institute of Radiation Medicine, Beijing, China
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Liang YG, Jorgensen AG, Kaestel CG, Wiencke AK, Lui GM, la Cour MH, Röpke CH, Nissen MH. Bcl-2, Bax, and c-Fos expression correlates to RPE cell apoptosis induced by UV-light and daunorubicin. Curr Eye Res 2000; 20:25-34. [PMID: 10611712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
PURPOSE The aim of this study was to determine the role of Bcl-2, Bcl-X L, Bax, and c-Fos in regulation of apoptosis, induced by ultraviolet-light A (UV-A) and daunorubicin (DNR), in retinal pigment epithelium (RPE) cells grown on bovine extracellular matrix (ECM)-coated or uncoated plastic dishes. METHODS Apoptosis in confluent RPE cells cultured on ECM-coated or uncoated dishes was induced by UV-A or DNR. Apoptosis was detected by 7-amino-actinomycin D labeling followed by flow cytometry and by terminal deoxy-transferase mediated X-dUTP nick end labeling (TUNEL). Cellular expression of Bcl-2, Bcl-X L, Bax, and c-Fos was determined by the use of antibodies and flow cytometry, Western blot analysis, and immunocytochemical staining. RESULTS Both UV-A and DNR induce apoptosis in human RPE cells in vitro. Human fetal RPE cells grown on ECM-coated dishes were significantly more resistant to UV-A or DNR induced apoptosis than cells grown on uncoated dishes. RPE cells grown on ECM-coated dishes expressed higher Bcl-2 levels and lower Bax levels compared to cells grown on uncoated dishes. However, Bcl-X L and c-Fos levels were comparable in the two cultures. After UV-A or DNR treatment, Bcl-2, Bcl-X L, Bax, and c-Fos levels were differently regulated in cells grown on ECM-coated dishes compared to cells grown on uncoated dishes. CONCLUSION A significant protection against apoptosis of RPE cells grown on ECM compared to cells grown on uncoated plastic dishes was found after exposure to UV-A or DNR. This protection was found to be proportionally correlated to the anti-apoptotic protein Bcl-2 and inversely correlated to the expression of Bax. Furthermore a sustained induction and expression of c-Fos was found to correlate to a higher percentage of apoptotic cells of RPE cells grown on plastic. These findings demonstrate that ECM is of great importance for RPE cell survival during noxious stimuli and points out the essential role for a healthy Bruch's Membrane (BM) for RPE survival.
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Affiliation(s)
- Y G Liang
- Institute of Medical Anatomy, Section A, the Panum Institute, University of Copenhagen, Denmark
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