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Zhang C, Xie Z, Xu F, Su J, Dong S, Nie Q, Shao Y, Zhou Q, Yang J., Yang X, Zhang X, Wu Y, Zhong W. MA24.01 Genomic Evolution Trajectory Depicts Invasiveness Acquisition from Pre-invasive to Invasive Adenocarcinoma. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.520] [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: 11/28/2022]
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52
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Huang ZX, Zhang XP, Dong S, Liu SJ, Yang RL, Zhou YS, Ma WG. [Renal mucinous tubular and spindle cell carcinoma combined with multiple bone metastasis: a case report and literature review]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:732-736. [PMID: 30122780] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mucinous tubular and spindle cell carcinoma (MTSCC) is a rare sub-type of renal cell carcinoma (RCC). It has been considered to be a kind of "indolent" tumor with low-grade fashion, weak invasive capacity and relatively favorable prognosis. However, in the current case, a 3.7 cm×2.8 cm spherical mass with contrast enhancement was found in the left kidney incidentally by computed tomography (CT) in a 60-year-old male patient. A lesion in the right humerus (2.1 cm×1.6 cm×3.1 cm) was found at the same time without any symptoms or sign of pathological fracture by magnetic resonance (MR) imaging. Further positron emission tomography (PET)/CT scan which was ordered immediately after admission suggested multiple bone destruction including skull, pelvis, sternum, right humerus and femur, left scapula, multiple vertebrae and libs. Pathological examination after radical nephrectomy and palliative resection with internal fixation of the lesion in the right humerus indicated that both renal (3.0 cm×3.0 cm×2.5 cm) and bone lesions were MTSCC with the features of high-grade ovoid epithelioid cells, cord-like spindle cells and mucinous matrix under light microscope. The diagnosis of renal MTSCC concurrent with multiple bone metastasis was made. This case report suggested the necessity of general evaluation, especially bone scan for possible distant metastasis, as MTSCC might present unexpected advanced behaviors without any orthopedic symptoms. The behavior of bone metastasis might be associated with male and elderly age. MTSCC has similar enhancement features to papillary RCC on CT scan. As results, attentions are needed to differentiate MTSCC from papillary RCC as they both tend to show lesser enhancement degrees than cortex. Rather than exhibiting a dedifferentiating appearance, the pathological characteristics of bone metastasis lesion were close to those of primary renal lesion. The reason of distant metastasis to the bone remained unclear, negative expression of cytokeratin (CK) 7 might be attributed to. Though immunotherapy, chemotherapy and target therapy could all be methods for systematic therapies, procedures to remove renal lesions and prevent skeletal related events are still highly recommended.
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Affiliation(s)
- Z X Huang
- Department of Urology, Peking University People's Hospital, Beijing 100044, China
| | - X P Zhang
- Department of Urology, Peking University People's Hospital, Beijing 100044, China
| | - S Dong
- Musculoskeletal Tumor Center, Peking University People's Hospital, Beijing 100044, China
| | - S J Liu
- Department of Urology, Peking University People's Hospital, Beijing 100044, China
| | - R Li Yang
- Musculoskeletal Tumor Center, Peking University People's Hospital, Beijing 100044, China
| | - Y S Zhou
- Department of Gastroenterological Surgery, Peking University People's Hospital, Beijing 100044, China
| | - W G Ma
- Department of Urology, Karamay Central Hospital of Xinjiang, Karamay 834000, Xinjiang, China
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Dong S, Flores R, Unger J, Su Q, Grobe R. Superposition principle for the simultaneous optimization of collective responses. Phys Rev E 2018; 98:012221. [PMID: 30110876 DOI: 10.1103/physreve.98.012221] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Indexed: 11/07/2022]
Abstract
We study the dynamics of sets of independent systems, all of which are coupled to the same time-dependent external force. Using optimal control theory, we compute the most efficient temporal pulse shape for this force that can maximize simultaneously the collective response of these systems. This response can be a weighted sum of all amplitudes at the final interaction time. Remarkably, it turns out that for certain systems this optimal force for the collective response can be related to the individual forces that would optimize each system separately. We illustrate this superposition principle for the simultaneous optimization of collective responses with numerical and also analytical solutions for sets of damped linear and nonlinear oscillators. We also apply this principle to predict the optimal temporal profile of a laser pulse that can maximize the final macroscopic polarization (total dipole moment) of a set of quantum mechanical two-level atoms.
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Affiliation(s)
- S Dong
- Intense Laser Physics Theory Unit and Department of Physics, Illinois State University, Normal, Illinois 61790-4560, USA.,Key Laboratory for Laser Plasmas, School of Physics and Astronomy, Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China
| | - R Flores
- Intense Laser Physics Theory Unit and Department of Physics, Illinois State University, Normal, Illinois 61790-4560, USA
| | - J Unger
- Intense Laser Physics Theory Unit and Department of Physics, Illinois State University, Normal, Illinois 61790-4560, USA
| | - Q Su
- Intense Laser Physics Theory Unit and Department of Physics, Illinois State University, Normal, Illinois 61790-4560, USA
| | - R Grobe
- Intense Laser Physics Theory Unit and Department of Physics, Illinois State University, Normal, Illinois 61790-4560, USA
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Wang S, Hong W, Dong S, Zhang ZT, Zhang J, Wang L, Wang Y. Genome engineering of Clostridium difficile using the CRISPR-Cas9 system. Clin Microbiol Infect 2018; 24:1095-1099. [PMID: 29604353 DOI: 10.1016/j.cmi.2018.03.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/22/2017] [Accepted: 01/14/2018] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Clostridium difficile is a notorious pathogenic species that can cause severe gastrointestinal infections in humans and animals. C. difficile infection (CDI) results in thousands of deaths worldwide every year. The elucidation of related mechanisms of CDI and exploration of potential therapeutic strategies are largely delayed due to the lack of efficient genetic engineering tools for C. difficile strains. METHODS Plasmids carrying the CRISPR-Cas9 system were constructed and transformed into C. difficile through conjugation. Mutants were identified using colony PCR with primers annealing to the regions flanking the target gene deletion/integration locus. Heat-survival assay was used to compare the sporulation frequency between the mutant with spo0A deletion and the wild type strain. The fluorescence in the mutant with the insertion of the green fluorescent protein (GFP) gene was inspected under a fluorescent microscope. RESULTS An efficient genome editing tool was developed for C. difficile based on the CRISPR-Cas9 system. With this tool, spo0A was deleted with a 100% mutation efficiency. Conversely, an anaerobic GFP gene was successfully inserted into the C. difficile chromosome (with a mutation efficiency of 80%). CONCLUSIONS The developed CRISPR-Cas9-based genome engineering tool will facilitate functional genomic studies in C. difficile as well as the elucidation of mechanisms related to host-bacteria interaction and pathogenesis of CDI. This will be highly beneficial for the development of innovative strategies for CDI diagnostics and therapies.
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Affiliation(s)
- S Wang
- Department of Biosystems Engineering, Auburn University, Auburn, AL, USA
| | - W Hong
- Department of Biosystems Engineering, Auburn University, Auburn, AL, USA; Key Laboratory of Endemic and Ethnic Diseases (Guizhou Medical University), Ministry of Education, Guiyang, People's Republic of China
| | - S Dong
- Department of Biosystems Engineering, Auburn University, Auburn, AL, USA
| | - Z-T Zhang
- Department of Biosystems Engineering, Auburn University, Auburn, AL, USA
| | - J Zhang
- Department of Biosystems Engineering, Auburn University, Auburn, AL, USA
| | - L Wang
- Department of Animal Sciences, Auburn University, Auburn, AL, USA
| | - Y Wang
- Department of Biosystems Engineering, Auburn University, Auburn, AL, USA.
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Zhang L, Yan J, Yang B, Zhang G, Wang M, Dong S, Liu W, Yang H, Li Q. IL-23 Activated γδ T Cells Affect Th17 Cells and Regulatory T Cells by Secreting IL-21 in Children with Primary Nephrotic Syndrome. Scand J Immunol 2017; 87:36-45. [PMID: 29119640 DOI: 10.1111/sji.12629] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/02/2017] [Indexed: 11/29/2022]
Abstract
This study (1) analysed the percentage of γδ T cells, γδ T cell subsets, Th17 cells and regulatory T cells (Treg cells) and (2) determined the role of IL-23 in primary nephrotic syndrome (PNS) patients with active disease and in remission. Eighty-four patients with PNS and 51 healthy age-matched controls were included in this study. The percentage of γδ T cells, γδ T cell subsets, Th17 cells and Treg cells in peripheral blood mononuclear cells (PBMCs) were analysed by fluorescence-activated cell sorting. PMBCs from PNS patients with active disease were cultured in the presence of IL-23, IL-23 and an IL-23 antagonist, or IL23 and an anti-IL-21 monoclonal antibody (mAb). The percentage of γδ T cells, IL-23R+ γδ T cells and IL-17+ γδ T cells were significantly increased in PNS patients with active disease. There was a positive correlation between the percentage of γδ T cells, IL-23R+ γδ T cells, IL-17+ γδ T cells and the Th17/Treg ratio. IL-23 increased the percentage of γδ T cells and Th17 cells and decreased the percentage of Treg cells in PBMCs isolated from PNS patients with active disease. Anti-IL-21 mAb reduced the percentage of γδ T cells and Th17 cells, but increased the percentage of Treg cells. γδ T cells, IL-17+ γδ T cells and IL-23R+ γδ T cells may be involved in the pathogenesis of paediatric PNS by modulating the balance of Th17/Treg cells. γδ T cells may cause an imbalance in Th17/Treg cells by secreting IL-21 in the presence of IL-23.
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Affiliation(s)
- L Zhang
- Ministry of Education, Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - J Yan
- Ministry of Education, Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - B Yang
- Ministry of Education, Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - G Zhang
- Department of Nephroimmunology, Children's Hospital, Chongqing Medical University, Chongqing, China
| | - M Wang
- Department of Nephroimmunology, Children's Hospital, Chongqing Medical University, Chongqing, China
| | - S Dong
- Ministry of Education, Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China.,The Central Laboratory of Children's Hospital, Chongqing Medical University, Chongqing, China
| | - W Liu
- Ministry of Education, Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - H Yang
- Department of Nephroimmunology, Children's Hospital, Chongqing Medical University, Chongqing, China
| | - Q Li
- Department of Nephroimmunology, Children's Hospital, Chongqing Medical University, Chongqing, China
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Dong S, Brendle M, Donnet JB. Influence du traitement thermique sur les propriétés de surface des fibres de carbone ex-mésophase. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1991881831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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57
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Sinclair R, Cao HB, Garlea VO, Lee M, Choi ES, Dun ZL, Dong S, Dagotto E, Zhou HD. Canted magnetic ground state of quarter-doped manganites R 0.75Ca 0.25MnO 3 (R = Y, Tb, Dy, Ho, and Er). J Phys Condens Matter 2017; 29:065802. [PMID: 28002058 DOI: 10.1088/1361-648x/aa4de1] [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] [Indexed: 06/06/2023]
Abstract
Polycrystalline samples of the quarter-doped manganites R 0.75Ca0.25MnO3 (R = Y, Tb, Dy, Ho, and Er) were studied by x-ray diffraction and AC/DC susceptibility measurements. All five samples are orthorhombic and exhibit similar magnetic properties: enhanced ferromagnetism below T 1 (∼80 K) and a spin glass (SG) state below T SG (∼30 K). With increasing R 3+ ionic size, both T 1 and T SG generally increase. The single crystal neutron diffraction results on Tb0.75Ca0.25MnO3 revealed that the SG state is mainly composed of a short-range ordered version of a novel canted (i.e. noncollinear) antiferromagnetic spin state. Furthermore, calculations based on the double exchange model for quarter-doped manganites reveal that this new magnetic phase provides a transition state between the ferromagnetic state and the theoretically predicted spin-orthogonal stripe phase.
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Affiliation(s)
- R Sinclair
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996-1200, USA
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58
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Eastlack SC, Alahari SK, Dong S, Cole JT. Abstract P4-07-05: MicroRNA-27b mediates deregulation of energy metabolism in breast cancer. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p4-07-05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
MicroRNAs (miRNAs) are a class of small, non-coding RNA which participate in gene regulation by targeted silencing of specific mRNA transcripts. Recently, it has become clear that dysfunctional miRNA expression is an important contributor to the deregulation of key signaling pathways underlying carcinogenesis. MicroRNA-27b is an example of one such pro-oncogenic miRNA, and correspondingly, its expression has been found to be upregulated in breast cancer cells and tissues. In this regard, several targets of miR-27b have previously been verified, and implicate miR-27b in multiple neoplastic processes including migration, invasion and metastasis. In order to enable future development of miRNA-based cancer therapies, the putative targets of each miRNA must be mapped more comprehensively. Such awareness is necessary in order to make informed choices regarding whether a miRNA-based therapy is likely to be effective and what side-effects should be anticipated. Therefore, this project seeks to further establish the role of miR-27b in the context of breast cancer, specifically by identifying novel target transcripts under its control. Using target prediction algorithms and breast cancer cell culture models, initial evidence has implicated Pyruvate Dehydrogenase Protein X (PDHX) to be a probable target. As a structural component of the Pyruvate Dehydrogenase Complex, the role of PDHX in linking the end products of glycolytic reactions with subsequent oxidative phosphorylation pathways is indispensable. However, a hallmark of cancer cell metabolism is the propensity to consume glucose aerobically, which liberates additional carbon skeletons for use in biosynthetic reactions that are crucial for tumor growth. In this way, miR-27b overexpression appears to sever the link between glycolysis and subsequent catabolic pathways, thus conferring a pro-growth advantage to the cancer cells. Expression profiling of PDHX using both breast cancer cell lines and human breast tissues (which overexpress miR-27b) reveal that PDHX levels are indeed significantly reduced, thus supporting the notion that miR-27b alters cancer cell metabolism specifically by targeting this gene in breast cancer. Improving the current understanding of miR-27b's functions will lay the necessary ground work to evaluate its potential as a novel target for cancer therapy. Similarly, the awareness of the expression status of miR-27b and its targets in breast cancer tumors will further efforts to find suitable miRNA tissue biomarkers to enhance screening and prognosis. In this way, microRNA-based approaches offer the distinct potential to improve cancer detection as well as treatment, making them a dynamic method to improve management of breast cancer patients in the future.
Citation Format: Eastlack SC, Alahari SK, Dong S, Cole JT. MicroRNA-27b mediates deregulation of energy metabolism in breast cancer [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P4-07-05.
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Affiliation(s)
- SC Eastlack
- Louisiana State University Health Sciences Center, New Orleans, LA; Ochsner Medical Center, Jefferson, LA
| | - SK Alahari
- Louisiana State University Health Sciences Center, New Orleans, LA; Ochsner Medical Center, Jefferson, LA
| | - S Dong
- Louisiana State University Health Sciences Center, New Orleans, LA; Ochsner Medical Center, Jefferson, LA
| | - JT Cole
- Louisiana State University Health Sciences Center, New Orleans, LA; Ochsner Medical Center, Jefferson, LA
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Zhai HR, Zhang JT, Yan LX, Zhang C, Su J, Dong S, Nie Q, Liao RQ, Jiang BY, Yang XN, Wu YL, Zhong WZ. 416P Typical morphological features revealed unfavorable survival benefits in high-grade neuroendocrine carcinomas. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw590.002] [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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60
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Zhai HR, Zhang JT, Yan LX, Zhang C, Su J, Dong S, Nie Q, Liao RQ, Jiang BY, Yang XN, Wu YL, Zhong WZ. 416P Typical morphological features revealed unfavorable survival benefits in high-grade neuroendocrine carcinomas. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00574-3] [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: 12/01/2022] Open
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Lei L, Cui L, Mao Y, Zhang X, Jiang Q, Dong S, Wang Y. Augmented CD25 and CD69 expression on circulating CD8+ T cells in type 2 diabetes mellitus with albuminuria. Diabetes Metab 2016; 43:382-384. [PMID: 27818037 DOI: 10.1016/j.diabet.2016.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 10/09/2016] [Indexed: 11/30/2022]
Affiliation(s)
- L Lei
- Division of Hematology and Endocrinology, Aerospace Center Hospital, Peking University Affiliate, Beijing, China.
| | - L Cui
- Division of Hematology and Endocrinology, Aerospace Center Hospital, Peking University Affiliate, Beijing, China
| | - Y Mao
- Department of Medicine, Cleveland Clinic Akron General Medical Center, Akron, OH, USA.
| | - X Zhang
- Division of Hematology and Endocrinology, Aerospace Center Hospital, Peking University Affiliate, Beijing, China
| | - Q Jiang
- Division of Hematology and Endocrinology, Aerospace Center Hospital, Peking University Affiliate, Beijing, China
| | - S Dong
- Division of Hematology and Endocrinology, Aerospace Center Hospital, Peking University Affiliate, Beijing, China
| | - Y Wang
- Division of Hematology and Endocrinology, Aerospace Center Hospital, Peking University Affiliate, Beijing, China
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Dong S, Cao Z, Li S, Wang YJ. 1339 Studies on different energy density of close-up diets on energy metabolism and lactation performance in montbeliarde-sired crossbred holstein cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-1339] [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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63
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Chen J, Zhuo WZ, Qin MH, Dong S, Zeng M, Lu XB, Gao XS, Liu JM. Effect of further-neighbor interactions on the magnetization behaviors of the Ising model on a triangular lattice. J Phys Condens Matter 2016; 28:346004. [PMID: 27356040 DOI: 10.1088/0953-8984/28/34/346004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we study the magnetization behaviors of the classical Ising model on the triangular lattice using Monte Carlo simulations, and pay particular attention to the effect of further-neighbor interactions. Several fascinating spin states are identified to be stabilized in certain magnetic field regions, respectively, resulting in the magnetization plateaus at 2/3, 5/7, 7/9 and 5/6 of the saturation magnetization M S, in addition to the well-known plateaus at 0, 1/3 and 1/2 of M S. The stabilization of these interesting orders can be understood as the consequence of the competition between Zeeman energy and exchange energy.
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Affiliation(s)
- J Chen
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, People's Republic of China
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Mamatsashvili G, Khujadze G, Chagelishvili G, Dong S, Jiménez J, Foysi H. Dynamics of homogeneous shear turbulence: A key role of the nonlinear transverse cascade in the bypass concept. Phys Rev E 2016; 94:023111. [PMID: 27627396 DOI: 10.1103/physreve.94.023111] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Indexed: 11/07/2022]
Abstract
To understand the mechanism of the self-sustenance of subcritical turbulence in spectrally stable (constant) shear flows, we performed direct numerical simulations of homogeneous shear turbulence for different aspect ratios of the flow domain with subsequent analysis of the dynamical processes in spectral or Fourier space. There are no exponentially growing modes in such flows and the turbulence is energetically supported only by the linear growth of Fourier harmonics of perturbations due to the shear flow non-normality. This non-normality-induced growth, also known as nonmodal growth, is anisotropic in spectral space, which, in turn, leads to anisotropy of nonlinear processes in this space. As a result, a transverse (angular) redistribution of harmonics in Fourier space is the main nonlinear process in these flows, rather than direct or inverse cascades. We refer to this type of nonlinear redistribution as the nonlinear transverse cascade. It is demonstrated that the turbulence is sustained by a subtle interplay between the linear nonmodal growth and the nonlinear transverse cascade. This course of events reliably exemplifies a well-known bypass scenario of subcritical turbulence in spectrally stable shear flows. These two basic processes mainly operate at large length scales, comparable to the domain size. Therefore, this central, small wave number area of Fourier space is crucial in the self-sustenance; we defined its size and labeled it as the vital area of turbulence. Outside the vital area, the nonmodal growth and the transverse cascade are of secondary importance: Fourier harmonics are transferred to dissipative scales by the nonlinear direct cascade. Although the cascades and the self-sustaining process of turbulence are qualitatively the same at different aspect ratios, the number of harmonics actively participating in this process (i.e., the harmonics whose energies grow more than 10% of the maximum spectral energy at least once during evolution) varies, but always remains quite large (equal to 36, 86, and 209) in the considered here three aspect ratios. This implies that the self-sustenance of subcritical turbulence cannot be described by low-order models.
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Affiliation(s)
- G Mamatsashvili
- Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany.,Department of Physics, Faculty of Exact and Natural Sciences, Tbilisi State University, Tbilisi 0179, Georgia.,Abastumani Astrophysical Observatory, Ilia State University, Tbilisi 0162, Georgia
| | - G Khujadze
- Chair of Fluid Mechanics, Universität Siegen, Siegen 57068, Germany
| | - G Chagelishvili
- Abastumani Astrophysical Observatory, Ilia State University, Tbilisi 0162, Georgia.,Institute of Geophysics, Tbilisi State University, Tbilisi 0128, Georgia
| | - S Dong
- School of Aeronautics, Universidad Politécnica de Madrid, Madrid 28040, Spain
| | - J Jiménez
- School of Aeronautics, Universidad Politécnica de Madrid, Madrid 28040, Spain
| | - H Foysi
- Chair of Fluid Mechanics, Universität Siegen, Siegen 57068, Germany
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Dou C, Chen Y, Ding N, Li N, Jiang H, Zhao C, Kang F, Cao Z, Quan H, Luo F, Xu J, Dong S. Xanthotoxin prevents bone loss in ovariectomized mice through the inhibition of RANKL-induced osteoclastogenesis. Osteoporos Int 2016; 27:2335-2344. [PMID: 26809192 DOI: 10.1007/s00198-016-3496-8] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 01/15/2016] [Indexed: 11/29/2022]
Abstract
UNLABELLED Xanthotoxin (XAT) is extracted from the seeds of Ammi majus. Here, we reported that XAT has an inhibitory effect on osteoclastogenesis in vitro through the suppression of both receptor activator of nuclear factor-κB ligand (RANKL)-induced ROS generation and Ca(2+) oscillations. In vivo studies showed that XAT treatment decreases the osteoclast number, prevents bone loss, and restores bone strength in ovariectomized mice. INTRODUCTION Excessive osteoclast formation and the resultant increase in bone resorption activity are key pathogenic factors of osteoporosis. In the present study, we have investigated the effects of XAT, a natural furanocoumarin, on the RANKL-mediated osteoclastogenesis in vitro and on ovariectomy-mediated bone loss in vivo. METHODS Cytotoxicity of XAT was evaluated using bone marrow macrophages (BMMs). Osteoclast differentiation, formation, and fusion were assessed using the tartrate-resistant acid phosphatase (TRAP) stain, the actin cytoskeleton and focal adhesion (FAK) stain, and the fusion assay, respectively. Osteoclastic bone resorption was evaluated using the pit formation assay. Reactive oxygen species (ROS) generation and removal were evaluated using dichlorodihydrofluorescein diacetate (DCFH-DA). Ca(2+) oscillations and their downstream signaling targets were then detected. The ovariectomized (OVX) mouse model was adopted for our in vivo studies. RESULTS In vitro assays revealed that XAT inhibited the differentiation, formation, fusion, and bone resorption activity of osteoclasts. The inhibitory effect of XAT on osteoclastogenesis was associated with decreased intracellular ROS generation. XAT treatment also suppressed RANKL-induced Ca(2+) oscillations and the activation of the resultant downstream calcium-CaMKK/PYK2 signaling. Through these two mechanisms, XAT downregulated the key osteoclastogenic factors nuclear factor of activated T cells c1 (NFATc1) and c-FOS. Our in vivo studies showed that XAT treatment decreases the osteoclast number, prevents bone loss, rescues bone microarchitecture, and restores bone strength in OVX mice. CONCLUSION Our findings indicate that XAT is protective against ovariectomy-mediated bone loss through the inhibition of RANKL-mediated osteoclastogenesis. Therefore, XAT may be considered to be a new therapeutic candidate for treating osteoporosis.
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Affiliation(s)
- C Dou
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Y Chen
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
| | - N Ding
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
| | - N Li
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
| | - H Jiang
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
| | - C Zhao
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
| | - F Kang
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
| | - Z Cao
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
| | - H Quan
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China
| | - F Luo
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - J Xu
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - S Dong
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing, 400038, China.
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Xiong Y, Dong S, Zhao X, Guo KJ, Gasco L, Zoccarato I. Gene expressions and metabolomic research on the effects of polyphenols from the involucres of Castanea mollissima Blume on heat-stressed broilers chicks. Poult Sci 2016; 95:1869-80. [PMID: 27209434 DOI: 10.3382/ps/pew170] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2016] [Indexed: 02/05/2023] Open
Abstract
To study the effects of polyphenolic extract from involucres of Castanea mollissima Blume ( PICB: ), a novel approach using gene expression by real time polymerase chain reaction ( REAL-TIME PCR: ) coupled with metabolomic profiling technique was established to explain the mechanism of PICB on heat-stressed broiler chicks. Four thousand 28-day-old male Arbor Acres (AA) broilers were randomly assigned to 5 groups (4 replicates / group, 20 chicks / replicate), in which group 1 was normal control group fed with basic ration; groups 2, 3, 4, and 5 were fed with the basic ration with a supplementation of 0.2% Vitamin C ( VC: ), or 0.2%, 0.3%, or 0.4% of PICB respectively. After 1 wk of adaptation, heat stress was applied for 7 consecutive days. On d 3 and d 7 of heat stress, the chicks were sacrificed and sampled. The mRNA expression of heat stress protein 70 (HSP70), glutathione peroxidase ( GSH-PX: ), ornithine decarboxylase ( ODC: ), epidermal growth factor ( EGF: ) and epidermal growth factor receptor ( EGFR: ) were detected by real-time PCR using samples from jejunum mucosa. The serum and jejunum mucosa metabolomic profiles of PICB group showing best antioxidative effects and control group at d 3 were studied using the method of the gas chromatography - time of flight mass spectrometry ( GT-TOF-MS: ), followed by principal component analysis and partial least squares-discriminate analysis. Potential biomarkers were found using Student's t-test. The results showed mRNA expressions of HSP70, GSH-Px, ODC, EGF, and EGFR were altered by the supplementation of PICB. PICB exhibited antioxidative and growth promoting effects, and 0.3% PICB supplementation level exhibited the best. Three metabolites in the serum and 5 in the jejunum mucosa were identified as potential biomarkers. They were considered to be in accordance with antioxidative and growth promoting effects of PICB, which involved in the energy metabolism (sorbitol, palmitic acid), carbohydrate metabolism, amino acids metabolism (serine, L-ornithine), glutathione metabolism (glutamate, L-ornithine), GnRH signaling pathway (inositol), etc. These findings provided novel insights into our understanding of molecular mechanism of PICB effects on heat-stressed chicks.
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Affiliation(s)
- Y Xiong
- College of Animal Science and Technology, Beijing University of Agriculture, No. 7 Beinong Road, Changping District, Beijing 102206, P.R. China
| | - S Dong
- College of Animal Science and Technology, Beijing University of Agriculture, No. 7 Beinong Road, Changping District, Beijing 102206, P.R. China
| | - X Zhao
- College of Animal Science and Technology, Beijing University of Agriculture, No. 7 Beinong Road, Changping District, Beijing 102206, P.R. China
| | - K J Guo
- College of Animal Science and Technology, Beijing University of Agriculture, No. 7 Beinong Road, Changping District, Beijing 102206, P.R. China
| | - Laura Gasco
- Department of Agricultural, Forest, and Food Sciences, Turin University. Grugliasco (TO), Italy
| | - Ivo Zoccarato
- Department of Agricultural, Forest, and Food Sciences, Turin University. Grugliasco (TO), Italy
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Abstract
Two-phase outflows refer to situations where the interface formed between two immiscible incompressible fluids passes through open portions of the domain boundary. We present several new forms of open boundary conditions for two-phase outflow simulations within the phase field framework, as well as a rotational pressure correction based algorithm for numerically treating these open boundary conditions. Our algorithm gives rise to linear algebraic systems for the velocity and the pressure that involve only constant and time-independent coefficient matrices after discretization, despite the variable density and variable viscosity of the two-phase mixture. By comparing simulation results with theory and the experimental data, we show that the method produces physically accurate results. We also present numerical experiments to demonstrate the long-term stability of the method in situations where large density contrast, large viscosity contrast, and backflows occur at the two-phase open boundaries.
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Affiliation(s)
- S. Dong
- Center for Computational & Applied Mathematics, Department of Mathematics, Purdue University, West Lafayette, Indiana, United States of America
- * E-mail:
| | - X. Wang
- Center for Computational & Applied Mathematics, Department of Mathematics, Purdue University, West Lafayette, Indiana, United States of America
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Dong S, Geng L, Shen MD, Zheng SS. WITHDRAWN: Natural Killer Cell Activating Receptor NKG2D Is Involved in the Immunosuppressant Effect of Mycophenolate Mofetil and Infection of Hepatitis B Virus. Transplant Proc 2016; 47:1796-801. [PMID: 26293053 DOI: 10.1016/j.transproceed.2015.02.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 02/10/2015] [Indexed: 11/19/2022]
Abstract
In this study we investigated whether mycophenolate mofetil (MMF), a new immunosuppressant, and its metabolite mycophenolic acid (MPA) influence the activity of liver resident natural killer (NK) cells, resulting in increased susceptibility to hepatitis B virus (HBV) infection. We isolated the hepatic NK cells of C57BL/6 and C57BL/6JTgN (A1b1HBV) 44Bri) transgenic mice administered MMF in the presence or absence of interleukin (IL)-15, or incubated isolated hepatic NK cells in the presence or absence of MPA and used RT-PCR, immunolabeling to assess the expression of NK receptors Ly49A, NKG2A and NKG2D, and cytokine ELISA and [(3)H]-TdR-release assay to assess the activation and cytotoxic capacity of NK cells. After treatment of MMF in the presence or absence of IL-15, HBsAg titer was also measured in C57BL/6JTgN (A1b1HBV) 44Bri) transgenic mice. After both MPA and MMF treatments, NK cytotoxicity was reduced, NKG2D and Ly49A expression was down-regulated, but NKG2A was up-regulated. Down-regulation of NKG2D could be ameliorated by IL-15, and in HBV-transgenic mice, MMF treatment impaired NK cell activity, but did not influence virus replication, whereas IL-15 treatment depressed HBsAg titer. MPA and MMF mediate down-regulation of NKG2D in vitro and vivo, restricting the cytotoxic capacity of NK cells. Regulation of NKG2D may be important in the effect of immunosuppressant on NK cell activity and involved in HBV infection.
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Affiliation(s)
- S Dong
- Department of General Surgery, The First Affiliated Hospital, College of Medicine, ZheJiang University, HangZhou, China
| | - L Geng
- Department of General Surgery, The First Affiliated Hospital, College of Medicine, ZheJiang University, HangZhou, China
| | - M-D Shen
- Department of General Surgery, The First Affiliated Hospital, College of Medicine, ZheJiang University, HangZhou, China
| | - S-S Zheng
- Department of General Surgery, The First Affiliated Hospital, College of Medicine, ZheJiang University, HangZhou, China.
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Sun H, Wu PS, Song LY, Hu JY, Dong S, Lu W. [Clinical outcomes of early repair for open orbital fracture]. Zhonghua Yan Ke Za Zhi 2016; 52:273-7. [PMID: 27094065 DOI: 10.3760/cma.j.issn.0412-4081.2016.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the clinical outcomes following early repair for orbital fracture and soft tissue simultaneously for open orbital fractures. METHODS Retrospective clinical study. This study comprised of 19 patients(20 eyes) with open orbital fracture who underwent surgery within 48 hours in the Second Hospital of Dalian Medical University between August 2011 and August 2014. The wounds were evaluated at the same time and the surgical debridement was done. The surgical exposure was achieved through direct approach and auxiliary cosmetic incisions. Titanium mesh and plate was used for orbital reconstruction. Local flaps or island flaps were used for soft tissue repair. With the post-operative CT scan, the condition of the soft tissue which was herniated, the orbital rim and orbital wall were observed. The measurement of the exophthalmos of both eyes was performed using Hertel exophthalmometer. Compared with the intact eye, the globe displacement (upward or downward) of the reconstructed eye was measured. The follow up duration was 12-24 months. The eye movement, diplopia, restriction of mouth opening, depression of midface, the condition of soft tissue and scar as well as post-operative complications were recorded. Comparison of the reconstructed eye's globe displacement before and after operation were analyzed with wilcoxon signed ranks test. Comparison of the exophthalmos of the reconstructed eye relative to the intact eye were analyzed with t-paired test. RESULTS In all 19 cases (20 eyes), fractures were anatomically reconstructed, and no cases of infection, titanium mesh and plate migration and rejection occured during the follow-up. Seven cases had eyeball hypoglobus with median 3.0 mm (min 2.0 mm, max 4.0 mm) pre-operatively. The Reconstructed eye globe were corrected in 6 cases and 1 case had residual hypoglobus of 1.0 mm ,median 0.0 mm (min 0.0 mm, max 1.0 mm). The amount of the eye globe displacement between pre-and post-operation was statistically significant(z=-2.40, P<0.05). Enophthalmos was corrected in 16 cases (the mean of posterior globe displacement in reconstructed orbit relative to intact orbit was less than or equal to 2.0mm), but in 2 patients the residual enophthalmos was 3.0 mm. The difference of the exophthalmos of both eyes was not obvious (t=-0.46,P>0.05). Among 20 eyes, 16 patients had restrictive eye movement. After 12 months follow-up, 13 eyes with restrictive eye movement were corrected while the other 3 showed improvement. Eight patients of restriction of mouth opening or midface depression were corrected and no infection complications were noted. There was no flap necrosis in 13 patients of soft tissue defect. CONCLUSION Surgical treatment of open orbital fractures with simultaneous repair of orbital fracture and soft tissue within 48 hours after trauma could correct enophthalmos, hypoglobus and eye movement function effectively and improve periorbital aesthetics. (Chin J Ophthalmol, 2016, 52: 273-277).
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Affiliation(s)
- H Sun
- Department of Ophthalmology, the Second Hospital of Dalian Medical University, Dalian 116023, China
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Dou C, Ding N, Xing J, Zhao C, Kang F, Hou T, Quan H, Chen Y, Dai Q, Luo F, Xu J, Dong S. Dihydroartemisinin attenuates lipopolysaccharide-induced osteoclastogenesis and bone loss via the mitochondria-dependent apoptosis pathway. Cell Death Dis 2016; 7:e2162. [PMID: 27031959 PMCID: PMC4823966 DOI: 10.1038/cddis.2016.69] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [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: 11/07/2015] [Revised: 01/27/2016] [Accepted: 03/02/2016] [Indexed: 12/19/2022]
Abstract
Dihydroartemisinin (DHA) is a widely used antimalarial drug isolated from the plant Artemisia annua. Recent studies suggested that DHA has antitumor effects utilizing its reactive oxygen species (ROS) yielding mechanism. Here, we reported that DHA is inhibitory on lipopolysaccharide (LPS)-induced osteoclast (OC) differentiation, fusion and bone-resorption activity in vitro. Intracellular ROS detection revealed that DHA could remarkably increase ROS accumulation during LPS-induced osteoclastogenesis. Moreover, cell apoptosis was also increased by DHA treatment. We found that DHA-activated caspase-3 increased Bax/Bcl-2 ratio during LPS-induced osteoclastogenesis. Meanwhile, the translocation of apoptotic inducing factor (AIF) and the release of cytochrome c from the mitochondria into the cytosol were observed, indicating that ROS-mediated mitochondrial dysfunction is crucial in DHA-induced apoptosis during LPS-induced osteoclastogenesis. In vivo study showed that DHA treatment decreased OC number, prevents bone loss, rescues bone microarchitecture and restores bone strength in LPS-induced bone-loss mouse model. Together, our findings indicate that DHA is protective against LPS-induced bone loss through apoptosis induction of osteoclasts via ROS accumulation and the mitochondria-dependent apoptosis pathway. Therefore, DHA may be considered as a new therapeutic candidate for treating inflammatory bone loss.
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Affiliation(s)
- C Dou
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing 400038, China.,Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Chongqing 400038, China
| | - N Ding
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - J Xing
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - C Zhao
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Chongqing 400038, China
| | - F Kang
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Chongqing 400038, China
| | - T Hou
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - H Quan
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Chongqing 400038, China
| | - Y Chen
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Chongqing 400038, China
| | - Q Dai
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - F Luo
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - J Xu
- Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - S Dong
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Chongqing 400038, China.,China Orthopedic Regenerative Medicine Group, Chongqing 400038, China
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Liu RM, Zhuo WZ, Dong S, Lu XB, Gao XS, Qin MH, Liu JM. Role of further-neighbor interactions in modulating the critical behavior of the Ising model with frustration. Phys Rev E 2016; 93:032114. [PMID: 27078299 DOI: 10.1103/physreve.93.032114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Indexed: 06/05/2023]
Abstract
In this work, we investigate the phase transitions and critical behaviors of the frustrated J(1)-J(2)-J(3) Ising model on the square lattice using Monte Carlo simulations, and particular attention goes to the effect of the second-next-nearest-neighbor interaction J(3) on the phase transition from a disordered state to the single stripe antiferromagnetic state. A continuous Ashkin-Teller-like transition behavior in a certain range of J(3) is identified, while the four-state Potts-critical end point [J(3)/J(1)](C) is estimated based on the analytic method reported in earlier work [Jin, Sen, and Sandvik, Phys. Rev. Lett. 108, 045702 (2012)]. It is suggested that the interaction J(3) can tune the transition temperature and in turn modulate the critical behaviors of the frustrated model. Furthermore, it is revealed that an antiferromagnetic J(3) can stabilize the staggered dimer state via a phase transition of strong first-order character.
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Affiliation(s)
- R M Liu
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - W Z Zhuo
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - S Dong
- Department of Physics, Southeast University, Nanjing 211189, China
| | - X B Lu
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - X S Gao
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - M H Qin
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
| | - J-M Liu
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
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Lin JT, Yang XN, Wen-Zhao Z, Liao RQ, Wu YL, Dong S, Nie Q. 428P Association of maximum standardized uptake value with occult mediastinal lymph node metastasis in cN0 non-small cell lung cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv532.12] [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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Yu D, Lv P, Dong S, Shen Y, Meng Y, Sheng J, Huang H. Epigenetic programming of impaired brown adipose tissue development in mouse exposed to intrauterine hyperglycemia. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.432] [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: 10/23/2022]
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Ma CY, Dong S, Zhou PX, Du ZZ, Liu MF, Liu HM, Yan ZB, Liu JM. The ferroelectric polarization of Y2CoMnO6 aligns along the b-axis: the first-principles calculations. Phys Chem Chem Phys 2015. [PMID: 26214759 DOI: 10.1039/c5cp02501j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Double-perovskite A2BB'O6 oxides with magnetic B and B' ions and E*-type antiferromagnetic order (E*-AFM, i.e. the ↑↑↓↓ structure) are believed to exhibit promising multiferroic properties, and Y2CoMnO6 (YCMO) is one candidate in this category. However, the microscopic origins for magnetically induced ferroelectricity in YCMO remain unclear. In this study, we perform detailed symmetry analysis on the exchange striction effect and lattice distortion, plus the first-principles calculations on YCMO. The E*-AFM state as the ground state with other competing states such as ferromagnetic and A-antiferromagnetic orders is confirmed. It is observed that the ferroelectricity is generated by the exchange striction associated with the E*-AFM order and chemically ordered Mn/Co occupation. Both the lattice symmetry consideration and first-principles calculations predict that the electric polarization aligns along the b-axis. The calculated polarization reaches up to 0.4682 μC cm(-2), mainly from the ionic displacement contribution. The present study presents a comprehensive understanding of the multiferroic mechanisms in YCMO and is of general significance for predicting emergent multiferroicity in other double-perovskite magnetic oxides.
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Affiliation(s)
- C Y Ma
- Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
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Cho S, Dong S, Parent KN, Chen M. Immune-tolerant elastin-like polypeptides (iTEPs) and their application as CTL vaccine carriers. J Drug Target 2015; 24:328-39. [PMID: 26307138 PMCID: PMC4813525 DOI: 10.3109/1061186x.2015.1077847] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 07/27/2015] [Indexed: 01/19/2023]
Abstract
BACKGROUND Cytotoxic T lymphocyte (CTL) vaccine carriers are known to enhance the efficacy of vaccines, but a search for more effective carriers is warranted. Elastin-like polypeptides (ELPs) have been examined for many medical applications but not as CTL vaccine carriers. PURPOSE We aimed to create immune tolerant ELPs using a new polypeptide engineering practice and create CTL vaccine carriers using the ELPs. RESULTS Four sets of novel ELPs, termed immune-tolerant elastin-like polypeptide (iTEP) were generated according to the principles dictating humoral immunogenicity of polypeptides and phase transition property of ELPs. The iTEPs were non-immunogenic in mice. Their phase transition feature was confirmed through a turbidity assay. An iTEP nanoparticle (NP) was assembled from an amphiphilic iTEP copolymer plus a CTL peptide vaccine, SIINFEKL. The NP facilitated the presentation of the vaccine by dendritic cells (DCs) and enhanced vaccine-induced CTL responses. DISCUSSION A new ELP design and development practice was established. The non-canonical motif and the immune tolerant nature of the iTEPs broaden our insights about ELPs. ELPs, for the first time, were successfully used as carriers for CTL vaccines. CONCLUSION It is feasible to concurrently engineer both immune-tolerant and functional peptide materials. ELPs are a promising type of CTL vaccine carriers.
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Affiliation(s)
- S. Cho
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 E 2000 S, Salt Lake City, Utah 84112
| | - S. Dong
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 E 2000 S, Salt Lake City, Utah 84112
| | - K. N. Parent
- Dept. of Biochemistry and Molecular Biology, Michigan State University, 603 Wilson Road, East Lansing, MI 48824
| | - M. Chen
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 E 2000 S, Salt Lake City, Utah 84112
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Xie D, Na J, Zhang M, Dong S, Xiao X. CT angiography of the lower extremity and coronary arteries using 256-section CT: a preliminary study. Clin Radiol 2015; 70:1281-8. [PMID: 26275584 DOI: 10.1016/j.crad.2015.07.003] [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: 09/22/2014] [Revised: 05/18/2015] [Accepted: 07/06/2015] [Indexed: 10/23/2022]
Abstract
AIM To investigate the possible use of a 256-section computed tomography (CT) prospective electrocardiography (ECG)-gated wide volume scanning protocol for combined angiography of the lower extremity and coronary arteries, after a single injection of contrast medium, in patients with lower extremity peripheral arterial disease (PAD). MATERIALS AND METHODS Thirty-four patients with suspected PAD underwent CT angiography (CTA) with a prospective ECG-gated protocol that covered the level of the tracheal bifurcation to the foot sole. Digital subtraction angiography (DSA) of the lower extremity arteries was performed on patients requiring therapeutic intervention. Image quality and stenosis of the coronary and lower extremity arteries were assessed. RESULTS A total of 93.1% of the coronary segments were adequate for diagnosis. 17 (50%) patients showed coronary artery stenosis ≥50%. A total of 95.8% of the lower extremity arterial segments were adequate for diagnosis. Twenty-eight patients with severe lower extremity arterial stenosis or occlusion underwent DSA. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of CTA for the detection of significant lower arterial stenosis (≥50%) was 94.8%, 97.2%, 95.3%, 96.9%, and 96.3%, respectively. CONCLUSION Using the prospective ECG-gated wide volume CTA protocol, images of the coronary and lower extremity arteries suitable for diagnosis can be acquired simultaneously after a single injection of contrast agent. In addition to accurately diagnosing PAD, combined angiography may be used to screen for coronary heart disease in patients with PAD.
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Affiliation(s)
- D Xie
- Department of Computer Tomography, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - J Na
- Department of MRI, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - M Zhang
- Department of Computer Tomography, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - S Dong
- Department of Computer Tomography, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China
| | - X Xiao
- Department of Computer Tomography, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China.
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Zhou PX, Dong S, Liu HM, Ma CY, Yan ZB, Zhong CG, Liu JM. Ferroelectricity driven magnetism at domain walls in LaAlO3/PbTiO3 superlattices. Sci Rep 2015; 5:13052. [PMID: 26269322 PMCID: PMC4642506 DOI: 10.1038/srep13052] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 02/04/2015] [Accepted: 07/09/2015] [Indexed: 11/17/2022] Open
Abstract
Charge dipole moment and spin moment rarely coexist in single-phase bulk materials except in some multiferroics. Despite the progress in the past decade, for most multiferroics their magnetoelectric performance remains poor due to the intrinsic exclusion between charge dipole and spin moment. As an alternative approach, the oxide heterostructures may evade the intrinsic limits in bulk materials and provide more attractive potential to realize the magnetoelectric functions. Here we perform a first-principles study on LaAlO3/PbTiO3 superlattices. Although neither of the components is magnetic, magnetic moments emerge at the ferroelectric domain walls of PbTiO3 in these superlattices. Such a twist between ferroelectric domain and local magnetic moment, not only manifests an interesting type of multiferroicity, but also is possible useful to pursuit the electrical-control of magnetism in nanoscale heterostructures.
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Affiliation(s)
- P X Zhou
- 1] Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China [2] School of Science, Nantong University, Nantong 226007, China
| | - S Dong
- Department of Physics, Southeast University, Nanjing 211189, China
| | - H M Liu
- Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - C Y Ma
- Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Z B Yan
- Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - C G Zhong
- School of Science, Nantong University, Nantong 226007, China
| | - J-M Liu
- Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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Yang XN, Dong S, Zhong W, Liao R, Nie Q, Lin J, Wu Y. F-151VIDEO-ASSISTED THORACOSCOPIC LOBECTOMY: WHAT IS THE ADVANTAGE OF A THREE-DIMENSIONAL OVER TWO-DIMENSIONAL THORACOSCOPE? Interact Cardiovasc Thorac Surg 2015. [DOI: 10.1093/icvts/ivv204.151] [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: 11/12/2022] Open
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Yang XN, Nie Q, Dong S, Zhong W, Liao R, Wu Y. O-112A NOVEL STRATEGY FOR INTRAOPERATIVE ANAESTHETIC MANAGEMENT DURING TRACHEAL RESECTION. Interact Cardiovasc Thorac Surg 2015. [DOI: 10.1093/icvts/ivv204.112] [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: 11/15/2022] Open
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Dong S, Li H, Gasco L, Xiong Y, Guo K, Zoccarato I. Antioxidative activity of the polyphenols from the involucres of Castanea mollissima Blume and their mitigating effects on heat stress. Poult Sci 2015; 94:1096-104. [DOI: 10.3382/ps/pev101] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2015] [Indexed: 12/11/2022] Open
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81
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Chen M, Cooper VI, Deng J, Amatya PL, Ambrus D, Dong S, Stalker N, Nadeau-Bonilla C, Patel J. Occurrence of Pharmaceuticals in Calgary's Wastewater and Related Surface Water. Water Environ Res 2015; 87:414-424. [PMID: 26460461 DOI: 10.2175/106143015x14212658614199] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The influents/effluents from Calgary's water resource recovery facilities and the surface water were analyzed for pharmaceuticals in the present study. The median concentrations in the effluents for the 15 targeted pharmaceuticals were within the range of 0.006 to 3.32 ppb. Although the wastewater treatment facilities were not designed to remove pharmaceuticals, this study indicates that the wastewater treatment processes are effective in removing some of the pharmaceuticals from the aqueous phase. The removal rate estimated can be 99.5% for caffeine, whereas little or no removal was observed for carbamazepine. Biodegradation, chemical degradation, and sorption could be some of the mechanisms responsible for the removal of pharmaceuticals. The drug residues in downstream surface water could be associated with incomplete removal of pharmaceuticals during the treatment process and may lead to concerns in terms of potential impacts on the aquatic ecosystem. However, this study does not indicate any immediate risks to the downstream aquatic environment.
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Qiu JJ, Zeisig BB, Li S, Liu W, Chu H, Song Y, Giordano A, Schwaller J, Gronemeyer H, Dong S, So CWE. Critical role of retinoid/rexinoid signaling in mediating transformation and therapeutic response of NUP98-RARG leukemia. Leukemia 2015; 29:1153-62. [PMID: 25510432 DOI: 10.1038/leu.2014.334] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 09/12/2014] [Accepted: 09/15/2014] [Indexed: 01/12/2023]
Abstract
While the nucleoporin 98-retinoic acid receptor gamma (NUP98-RARG) is the first RARG fusion protein found in acute leukemia, its roles and the molecular basis in oncogenic transformation are currently unknown. Here, we showed that homodimeric NUP98-RARG not only acquired unique nuclear localization pattern and ability of recruiting both RXRA and wild-type NUP98, but also exhibited similar transcriptional properties as RARA fusions found in acute promyelocytic leukemia (APL). Using murine bone marrow retroviral transduction/transformation assay, we further demonstrated that NUP98-RARG fusion protein had gained transformation ability of primary hematopoietic stem/progenitor cells, which was critically dependent on the C-terminal GLFG domain of NUP98 and the DNA binding domain (DBD) of RARG. In contrast to other NUP98 fusions, cells transformed by the NUP98-RARG fusion were extremely sensitive to all-trans retinoic acid (ATRA) treatment. Interestingly, while pan-RXR agonists, SR11237 and LGD1069 could specifically inhibit NUP98-RARG transformed cells, mutation of the RXR interaction domain in NUP98-RARG had little effect on its transformation, revealing that therapeutic functions of rexinoid can be independent of the direct biochemical interaction between RXR and the fusion. Together, these results indicate that deregulation of the retinoid/rexinoid signaling pathway has a major role and may represent a potential therapeutic target for NUP98-RARG-mediated transformation.
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Affiliation(s)
- J J Qiu
- 1] Department of Medicine, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA [2] Department of Pathology and Laboratory Medicine, Temple University School of Medicine, Philadelphia, PA, USA
| | - B B Zeisig
- King's College London, Leukaemia and Stem Cell Biology Group, Department of Haematologial Medicine, London UK
| | - S Li
- 1] Department of Medicine, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA [2] Department of Oncology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - W Liu
- Department of Oncology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - H Chu
- Department of Medicine, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Y Song
- Department of Pharmacology, Baylor College of Medicine, Houston, TX, USA
| | - A Giordano
- 1] Sbarro Institute for Cancer Research and Molecular Medicine & Center for Biotechology, Temple University, Philadelphia, PA, USA [2] Department of Medicine, Surgery & Neuroscience, University of Siena, Siena, Italy
| | - J Schwaller
- University Children's Hospital Basel (UKBB), Department of Biomedicine, Hebelstrasse 20, CH-4031 Basel, Switzerland
| | - H Gronemeyer
- Equipe Labellisée Ligue Contre le Cancer, Department of Functional Genomics and Cancer, Institut Génétique de Biologie Moléculaire et Cellulaire (IGBMC), CNRS/INSERM/UdS/CERBM, C.U. de Strasbourg, BP 10142, Illkirch-Cedex, France
| | - S Dong
- Department of Medicine, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - C W E So
- King's College London, Leukaemia and Stem Cell Biology Group, Department of Haematologial Medicine, London UK
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Wang Y, Yang Y, Ma F, Xuan L, Xu Y, Huo H, Zhou D, Dong S. Optimization of Chlorella vulgaris and bioflocculant-producing bacteria co-culture: enhancing microalgae harvesting and lipid content. Lett Appl Microbiol 2015; 60:497-503. [PMID: 25693426 DOI: 10.1111/lam.12403] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 01/28/2015] [Accepted: 01/29/2015] [Indexed: 11/28/2022]
Abstract
UNLABELLED Microalgae are a sustainable bioresource, and the biofuel they produce is widely considered to be an alternative to limited natural fuel resources. However, microalgae harvesting is a bottleneck in the development of technology. Axenic Chlorella vulgaris microalgae exhibit poor harvesting, as expressed by a flocculation efficiency of 0·2%. This work optimized the co-culture conditions of C. vulgaris and bioflocculant-producing bacteria in synthetic wastewater using response surface methodology (RSM), thus aiming to enhance C. vulgaris harvesting and lipid content. Three significant process variables- inoculation ratio of bacteria and microalgae, initial glucose concentration, and co-culture time- were proposed in the RSM model. F-values (3·98/8·46) and R(2) values (0·7817/0·8711) both indicated a reasonable prediction by the RSM model. The results showed that C. vulgaris harvesting efficiency reached 45·0-50·0%, and the lipid content was over 21·0% when co-cultured with bioflocculant-producing bacteria under the optimized culture conditions of inoculation ratio of bacteria and microalgae of 0·20-0·25, initial glucose concentration of <1·5 kg m(-3) and co-culture time of 9-14 days. This work provided new insights into microalgae harvesting and cost-effective microalgal bioproducts, and confirmed the promising prospect of introducing bioflocculant-producing bacteria into microalgae bioenergy production. SIGNIFICANCE AND IMPACT OF THE STUDY This work optimized the co-culture conditions of microalgae (C. vulgaris) and bioflocculant-producing bacteria (F2, Rhizobium radiobacter) in synthetic wastewater using response surface methodology, aiming to enhance C. vulgaris harvesting and lipid produced content. Bioflocculant-producing microbes are environmentally friendly functional materials. They avoid the negative effects of traditional chemical flocculants. This work provided new insights into microalgae harvesting and cost-effective production of microalgal bioproducts, and confirmed the promising prospect of introducing bioflocculant-producing bacteria into microalgae bioenergy production.
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Affiliation(s)
- Y Wang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, China
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84
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Lin L, Zhu HX, Jiang XM, Wang KF, Dong S, Yan ZB, Yang ZR, Wan JG, Liu JM. Coupled ferroelectric polarization and magnetization in spinel FeCr2S4. Sci Rep 2014; 4:6530. [PMID: 25284432 PMCID: PMC4185382 DOI: 10.1038/srep06530] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 09/15/2014] [Indexed: 11/29/2022] Open
Abstract
One of the core issues for multiferroicity is the strongly coupled ferroelectric polarization and magnetization, while so far most multiferroics have antiferromagnetic order with nearly zero magnetization. Magnetic spinel compounds with ferrimagnetic order may be alternative candidates offering large magnetization when ferroelectricity can be activated simultaneously. In this work, we investigate the ferroelectricity and magnetism of spinel FeCr2S4 in which the Fe2+ sublattice and Cr3+ sublattice are coupled in antiparallel alignment. Well defined ferroelectric transitions below the Fe2+ orbital ordering termperature Too = 8.5 K are demonstrated. The ferroelectric polarization has two components. One component arises mainly from the noncollinear conical spin order associated with the spin-orbit coupling, which is thus magnetic field sensitive. The other is probably attributed to the Jahn-Teller distortion induced lattice symmetry breaking, occuring below the orbital ordering of Fe2+. Furthermore, the coupled ferroelectric polarization and magnetization in response to magnetic field are observed. The present work suggests that spinel FeCr2S4 is a multiferroic offering both ferroelectricity and ferrimagnetism with large net magnetization.
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Affiliation(s)
- L Lin
- 1] Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China [2] Department of Physics, Southeast University, Nanjing 211189, China
| | - H X Zhu
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - X M Jiang
- Institute for Quantum Materials, Hubei Polytechnic University, Huangshi 435100, China
| | - K F Wang
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - S Dong
- Department of Physics, Southeast University, Nanjing 211189, China
| | - Z B Yan
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - Z R Yang
- Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J G Wan
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - J-M Liu
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
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85
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Lv P, Meng Y, Li J, Lv M, Yu D, Shen Y, Dong S, Ding G, Huang H. Altered thyroid hormone level in offspring exposure to high estrogen level during the first trimester of pregnancy. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.274] [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: 10/24/2022]
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86
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Dai Y, Dong S, Zhu M, Wu D, Zhong Y. Visualizing cerebral veins in fetal brain using susceptibility-weighted MRI. Clin Radiol 2014; 69:e392-7. [PMID: 25060932 DOI: 10.1016/j.crad.2014.06.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 06/09/2014] [Accepted: 06/10/2014] [Indexed: 01/12/2023]
Abstract
AIM To explore the feasibility of two-dimensional (2D) susceptibility-weighted imaging (SWI) in the visualization of cerebral veins in the foetal brain. MATERIALS AND METHODS Forty-two pregnant healthy women (gestational age: 19-37 weeks, mean: 28.5 ± 7.1 weeks) underwent SWI examination using a 1.5 T MRI system. Two neurologists independently analysed all magnetic resonance imaging (MRI) studies. The relationship between the veins detected and the gestational age was investigated. The prominence of veins was assessed using a categorical score. RESULTS In total, 167 veins were detected by SWI in 29 subjects with a symmetric hemisphere distribution (p > 0.05). An additional vein was detected by SWI biweekly from 24 weeks of gestation. Most veins of Galen and internal cerebral veins on SWI images were prominent, whereas others were faint or moderate. CONCLUSION SWI appears to be a feasible method of detecting cerebral veins in the foetal brain.
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Affiliation(s)
- Y Dai
- Philips Healthcare, People's Republic of China
| | - S Dong
- Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, People's Republic of China
| | - M Zhu
- Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, People's Republic of China.
| | - D Wu
- Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, People's Republic of China
| | - Y Zhong
- Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, People's Republic of China
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87
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Goldstein D, Bell ML, Butow P, Sze M, Vaccaro L, Dong S, Liauw W, Hui R, Tattersall M, Ng W, Asghari R, Steer C, Vardy J, Parente P, Harris M, Karanth NV, King M, Girgis A, Eisenbruch M, Jefford M. Immigrants' perceptions of the quality of their cancer care: an Australian comparative study, identifying potentially modifiable factors. Ann Oncol 2014; 25:1643-9. [PMID: 24827124 DOI: 10.1093/annonc/mdu182] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Recent data show a falling cancer mortality in the general population without a similar shift in immigrant outcomes, leading to a greater cancer burden and mortality for immigrants. Our aims were to compare perceived patterns of care in immigrants and native-born cancer patients. PATIENTS AND METHODS This was a hospital-based sample of first-generation immigrants and Australian-born Anglo patients in the first year following diagnosis. It was restricted to Chinese, Arabic, or Greek speakers. Eligible participants, recruited via 16 oncology clinics, were over 18, with cancer (any type or stage), and having commenced treatment at least 1 month previously. Five hundred and seventy-one CALD patients (comprising 145 Arabic, 248 Chinese, and 178 Greek) and a control group of 274 Anglo-Australian patients participated. RESULTS Immigrants had difficulty communicating with the doctor (73% versus 29%) and understanding the health system (38% versus 10%). Differences were found in 'difficulty knowing who to see' (P = 0.0002), 'length of time to confirm diagnosis' (P = 0.04), wanting more choice about a specialist and hospital (P < 0.0001); being offered the opportunity to see a counselor (P < 0.0001); and actually seeing one (P < 0.0001). There were no significant self-reported differences regarding how cancer was detected, time to see a health professional, or type first seen; however, immigrants reported difficulty knowing who to see. Previous studies showed differences in patterns of care according to socioeconomic status (SES) and educational level. Despite adjusting for age, sex, education, marital status, SES, time since diagnosis, and type of cancer, we did not find significant differences. Instead, we found that understanding of the health system and confidence understanding English were important factors. CONCLUSIONS This study confirmed that immigrants with cancer perceive an inferior quality of cancer care. We highlight potentially modifiable factors including assistance in navigating the health system, translated information, and cultural competency training for health professionals.
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Affiliation(s)
- D Goldstein
- Department of Medical Oncology, Prince of Wales Hospital, Sydney
| | - M L Bell
- Psycho-Oncology Co-operative Research Group (PoCoG), University of Sydney, Sydney
| | - P Butow
- Psycho-Oncology Co-operative Research Group (PoCoG), University of Sydney, Sydney Centre of Medical Psychology and Evidence-based Decision-making (CeMPED), University of Sydney, Sydney
| | - M Sze
- Psycho-Oncology Co-operative Research Group (PoCoG), University of Sydney, Sydney
| | - L Vaccaro
- Psycho-Oncology Co-operative Research Group (PoCoG), University of Sydney, Sydney
| | - S Dong
- Psycho-Oncology Co-operative Research Group (PoCoG), University of Sydney, Sydney
| | - W Liauw
- Cancer Care Centre, St George Hospital, Sydney
| | - R Hui
- Department of Medical Oncology, Westmead Hospital and Blacktown Oncology Unit, Blacktown Hospital Sydney, Sydney
| | - M Tattersall
- Department of Cancer Medicine, University of Sydney, Sydney Department of Medical Oncology, Royal Prince Alfred Hospital, Sydney
| | - W Ng
- Department of Medical Oncology, Liverpool Hospital, Sydney
| | - R Asghari
- Bankstown Cancer Care Centre, Bankstown Lidcombe Hospital, Sydney
| | - C Steer
- Border Medical Oncology, Wodonga
| | - J Vardy
- Centre of Medical Psychology and Evidence-based Decision-making (CeMPED), University of Sydney, Sydney
| | - P Parente
- Department of Clinical Haematology and Medical Oncology, Box Hill Hospital, Victoria
| | - M Harris
- Department of Medical Oncology, Monash Medical Centre, Victoria
| | - N V Karanth
- Department of Medical Oncology, Royal Darwin Hospital, Northern Territory
| | - M King
- Psycho-Oncology Co-operative Research Group (PoCoG), University of Sydney, Sydney
| | - A Girgis
- Translational Cancer Research Unit, Ingham Institute for Applied Medical Research, and University of NSW, Sydney
| | - M Eisenbruch
- School of Psych, Psychiatry and Psych Medicine, Monash University, Victoria
| | - M Jefford
- Sir Peter MacCallum Department of Oncology and Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria Division of Medicine, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
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88
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Affiliation(s)
- J.-L. Guéant
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
| | - S. Dong
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
- Inserm U 1116; Nancy France
| | - R.-M. Guéant-Rodriguez
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
| | - M. Blanca
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
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Ansorge IJ, Baringer MO, Campos EJD, Dong S, Fine RA, Garzoli SL, Goni G, Meinen CS, Perez RC, Piola AR, Roberts MJ, Speich S, Sprintall J, Terre T, Van den Berg MA. Basin-Wide Oceanographic Array Bridges the South Atlantic. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/2014eo060001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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90
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Zhao ZY, Liu MF, Li X, Lin L, Yan ZB, Dong S, Liu JM. Experimental observation of ferrielectricity in multiferroic DyMn2O5. Sci Rep 2014; 4:3984. [PMID: 24496324 PMCID: PMC3913922 DOI: 10.1038/srep03984] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 01/20/2014] [Indexed: 11/09/2022] Open
Abstract
One of the major breakthroughs associated with multiferroicity in recent years is the discovery of ferroelectricity generated by specific magnetic structures in some magnetic insulating oxides such as rare-earth manganites RMnO3 and RMn2O5. An unresolved issue is the small electric polarization. Relatively large electric polarization and strong magnetoelectric coupling have been found in those manganites of double magnetic ions: magnetic rare-earth R ion and Mn ion, due to the strong R-Mn (4f-3d) interactions. DyMn2O5 is a representative example. We unveil in this work the ferrielectric nature of DyMn2O5, in which the two ferroelectric sublattices with opposite electric polarizations constitute the ferrielectric state. One sublattice has its polarization generated by the symmetric exchange striction from the Mn-Mn interactions, while the polarization of the other sublattice is attributed to the symmetric exchange striction from the Dy-Mn interactions. We present detailed measurements on the electric polarization as a function of temperature, magnetic field, and measuring paths. The present experiments may be helpful for clarifying the puzzling issues on the multiferroicity in DyMn2O5 and other RMn2O5 multiferroics.
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Affiliation(s)
- Z Y Zhao
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - M F Liu
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - X Li
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - L Lin
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - Z B Yan
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - S Dong
- Department of Physics, Southeast University, Nanjing 210189, China
| | - J-M Liu
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
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91
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An Y, Fu Y, Lu D, Wang Y, Bi W, Xu Z, Dong S, Zhang S, Wang C, Zhang W. A TiO2-Au–polymer hybrid system for the photoelectrochemical immunoassay of SirT1. J Mater Chem B 2014; 2:1644-1652. [DOI: 10.1039/c3tb21471k] [Citation(s) in RCA: 8] [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: 12/25/2022]
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92
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Wang YF, Zhuang YY, Pang L, Dong S, Ma HC, Ma HS. Intubation without muscle relaxation for suspension laryngoscopy: A randomized, controlled study. Niger J Clin Pract 2014; 17:456. [DOI: pmid: 24909469 doi: 10.4103/1119-3077.134038] [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: 07/28/2023]
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93
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Wang YF, Zhuang YY, Pang L, Dong S, Ma HC, Ma HS. Intubation without muscle relaxation for suspension laryngoscopy: A randomized, controlled study. Niger J Clin Pract 2014; 17:456-61. [DOI: 10.4103/1119-3077.134038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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94
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He W, Zhao S, Liu X, Dong S, Lv J, Liu D, Wang J, Meng Z. ReSeqTools: an integrated toolkit for large-scale next-generation sequencing based resequencing analysis. Genet Mol Res 2013; 12:6275-83. [PMID: 24338423 DOI: 10.4238/2013.december.4.15] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [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: 11/03/2022]
Abstract
Large-scale next-generation sequencing (NGS)-based resequencing detects sequence variations, constructs evolutionary histories, and identifies phenotype-related genotypes. However, NGS-based resequencing studies generate extraordinarily large amounts of data, making computations difficult. Effective use and analysis of these data for NGS-based resequencing studies remains a difficult task for individual researchers. Here, we introduce ReSeqTools, a full-featured toolkit for NGS (Illumina sequencing)-based resequencing analysis, which processes raw data, interprets mapping results, and identifies and annotates sequence variations. ReSeqTools provides abundant scalable functions for routine resequencing analysis in different modules to facilitate customization of the analysis pipeline. ReSeqTools is designed to use compressed data files as input or output to save storage space and facilitates faster and more computationally efficient large-scale resequencing studies in a user-friendly manner. It offers abundant practical functions and generates useful statistics during the analysis pipeline, which significantly simplifies resequencing analysis. Its integrated algorithms and abundant sub-functions provide a solid foundation for special demands in resequencing projects. Users can combine these functions to construct their own pipelines for other purposes.
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Affiliation(s)
- W He
- School of Bioscience and Bioengineering, South, China University of Technology, Guangzhou, Guangdong, China
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95
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Dong S, Acouetey DS, Guéant-Rodriguez RM, Zmirou-Navier D, Rémen T, Blanca M, Mertes PM, Guéant JL. Prevalence of IgE against neuromuscular blocking agents in hairdressers and bakers. Clin Exp Allergy 2013; 43:1256-62. [DOI: 10.1111/cea.12189] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 08/12/2013] [Accepted: 08/20/2013] [Indexed: 11/28/2022]
Affiliation(s)
- S. Dong
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
- Inserm U 961 - Groupe Choc; Nancy France
| | - D. S. Acouetey
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
| | - R.-M. Guéant-Rodriguez
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
| | - D. Zmirou-Navier
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
- Ecole des Hautes Etudes en Santé Publique; Rennes France
| | - T. Rémen
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
| | - M. Blanca
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
| | | | - J.-L. Guéant
- Faculty of Medicine; Nutrition-Genetics and Risks to Environmental Exposure; Inserm-U954; University of Lorraine; Nancy France
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Abstract
OBJECTIVES To investigate the expression and clinical significance of the protein tyrosine phosphatase, nonreceptor type 11 (PTPN11 or SHP2) gene, which encodes Src homology 2 domain-containing phosphatase (SHP-2) in gastric cancer. METHODS SHP2 expression was detected by immunohistochemical staining and real-time quantitative reverse transcription-polymerase chain reaction in tissue samples of normal gastric mucosa and different grades of gastric cancer. Correlation between SHP2 expression and standard clinico pathological parameters was analysed. RESULTS Immunohistochemical staining revealed significantly higher rates of SHP2 expression in gastric cancer tissues (72.5%) versus normal gastric mucosa (21.9%). SHP-2 mRNA levels were also significantly higher in gastric cancer tissues versus normal gastric mucosa. SHP2 expression correlated significantly with tumour differentiation, clinical classification and lymph node metastases, but was independent of sex and age. CONCLUSIONS SHP-2 is upregulated in gastric cancer and may be related to the development of gastric cancer. SHP-2 may be a potential prognostic marker of, or a therapeutic target for, gastric cancer.
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Affiliation(s)
- S Dong
- Department of Gastroenterological Surgery, The First Affiliated Hospital, Medical College, Zhejiang University, Hangzhou, Zhejiang Province, China
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97
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Dong S, Jia C, Zhang S, Fan G, Li Y, Shan P, Sun L, Xiao W, Li L, Zheng Y, Liu J, Wei H, Hu C, Zhang W, Chin YE, Zhai Q, Li Q, Liu J, Jia F, Mo Q, Edwards DP, Huang S, Chan L, O'Malley BW, Li X, Wang C. The REGγ proteasome regulates hepatic lipid metabolism through inhibition of autophagy. Cell Metab 2013; 18:380-91. [PMID: 24011073 PMCID: PMC3813599 DOI: 10.1016/j.cmet.2013.08.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 06/22/2013] [Accepted: 08/09/2013] [Indexed: 12/17/2022]
Abstract
The ubiquitin-proteasome and autophagy-lysosome systems are major proteolytic pathways, whereas function of the Ub-independent proteasome pathway is yet to be clarified. Here, we investigated roles of the Ub-independent REGγ-proteasome proteolytic system in regulating metabolism. We demonstrate that mice deficient for the proteasome activator REGγ exhibit dramatic autophagy induction and are protected against high-fat diet (HFD)-induced liver steatosis through autophagy. Molecularly, prevention of steatosis in the absence of REGγ entails elevated SirT1, a deacetylase regulating autophagy and metabolism. REGγ physically binds to SirT1, promotes its Ub-independent degradation, and inhibits its activity to deacetylate autophagy-related proteins, thereby inhibiting autophagy under normal conditions. Moreover, REGγ and SirT1 dissociate from each other through a phosphorylation-dependent mechanism under energy-deprived conditions, unleashing SirT1 to stimulate autophagy. These observations provide a function of the REGγ proteasome in autophagy and hepatosteatosis, underscoring mechanistically a crosstalk between the proteasome and autophagy degradation system in the regulation of lipid homeostasis.
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Affiliation(s)
- Shuxian Dong
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai, 200241, China; Department of Molecular and Cellular Biology, Department of Medicine, The Dan L. Duncan Cancer Center, The Diabetes Research Center, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
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98
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Dong S, Zhuang P, Zhang XH, Li JY, Li YJ. Unilateral deep brain stimulation of the right globus pallidus internus in patients with Tourette's syndrome: two cases with outcomes after 1 year and a brief review of the literature. J Int Med Res 2013. [PMID: 23206487 DOI: 10.1177/030006051204000545] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Tourette's syndrome is a complex neuropsychiatric disorder, characterized by tics. Bilateral globus pallidus internus (GPi) deep brain stimulation (DBS) has been considered to be an effective treatment for refractory Tourette's syndrome. Postoperative outcomes are described after 12 months' follow-up in a 41-year-old male patient and a 22-year-old male patient with Tourette's syndrome, both of whom underwent unilateral electrode implantations into the right GPi for DBS. These patients were diagnosed with Tourette's syndrome in childhood and, despite long-term therapy with a range of antipsychotic medications, continued to experience disabling tics in adulthood. Improvements in tic severity of 58.5% and 53.1% were observed at 12 months in the older and younger patient, respectively; improvements were determined by the Yale Global Tic Severity Scale. Both patients also experienced reductions in tic frequency and reported improvements in their health-related quality of life. Improvements in tics were similar to previous reports involving patients who underwent bilateral GPi DBS. These cases suggest that unilateral DBS of the right GPi is effective and might be a viable surgical choice for some patients with Tourette's syndrome.
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Affiliation(s)
- S Dong
- Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Beijing, China
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99
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Dong S, Shi X, Liu Q, Zhang Z, Zhao L. Separation and analysis of phenylethanoid glycosides inLamiophlomis rotataby high-performance liquid chromatography. ACTA CHROMATOGR 2013. [DOI: 10.1556/achrom.25.2013.2.12] [Citation(s) in RCA: 2] [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: 11/19/2022]
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100
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Kanthasamy M, Bognanno A, Subramanian V, Macneilly L, Miguel L, Dong S, Taiwo E, Nauta M, Yoong W. Obstetric outcome of ethnic Turkish women in London: a retrospective case-control study. J OBSTET GYNAECOL 2013; 33:367-9. [PMID: 23654317 DOI: 10.3109/01443615.2013.773295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
There is concern that the maternal mortality in ethnic minority women is significantly greater than that of Caucasian British women. The objective of this study was to compare the demographic and obstetric outcomes between these two groups. Data were collected retrospectively over a 2-year period from 148 index and 148 control cases. The study group had statistically similar maternal age, labour duration, blood loss and mode of delivery compared with Caucasian British women (p > 0.05). A total of 68% of Turkish women spoke little or no English; were more likely to be non-smokers and also more likely to be married to unemployed spouses (p = 0.0001). This is the first study comparing obstetric outcomes of immigrant Turkish women with their Caucasian British counterparts. There was no significant difference in maternal or fetal outcomes, which could be attributed to the 'healthy migrant' theory, coupled with increased vigilance in ethnic minority pregnancies.
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Affiliation(s)
- M Kanthasamy
- St George's University, International School of Medicine, Grenada, West Indies
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