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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] [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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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] [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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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] [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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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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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81
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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] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2015] [Indexed: 12/11/2022] Open
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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 ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2015; 87:414-424. [PMID: 26460461 DOI: 10.2175/106143015x14212658614199] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [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] [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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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] [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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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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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88
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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] [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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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] [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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Lv P, Zhou M, He J, Meng W, Ma X, Dong S, Meng X, Zhao X, Wang X, He F. Circulating miR-208b and miR-34a are associated with left ventricular remodeling after acute myocardial infarction. Int J Mol Sci 2014; 15:5774-88. [PMID: 24714087 PMCID: PMC4013595 DOI: 10.3390/ijms15045774] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 03/10/2014] [Accepted: 03/13/2014] [Indexed: 02/07/2023] Open
Abstract
Left ventricular remodeling after acute myocardial infarction (AMI) is associated with adverse prognosis. It is becoming increasingly clear that circulating miRNAs could be promising biomarkers for various pathological processes in the heart, including myocardial infarction, myocardial remodeling and progression to heart failure. In the present study, a total of 359 consecutive patients were recruited. Plasma samples were collected on admission. Echocardiographic studies were performed during the admission and at six months follow-up after AMI. Remodeling was defined as an at least 10% increase from baseline in the left ventricular end-diastolic volume. Plasma miRNA levels were assessed for association with six months mortality or development of heart failure. Results showed that levels of plasma miR-208b and miR-34a were significantly higher in patients with remodeling than those without. Increased miRNA levels were strongly associated with increased risk of mortality or heart failure within six months for miR-208b (OR 17.91, 95% confidence interval=2.07-98.81, p=0.003), miR-34a (OR 4.18, 95% confidence interval=1.36-12.83, p=0.012) and combination of the two miRNAs (OR 18.73, 95% confidence interval=1.96-101.23, p=0.000). The two miRNA panels reclassified a significant proportion of patients with a net reclassification improvement of 11.7% (p=0.025) and an integrated discrimination improvement of 7.7% (p=0.002). These results demonstrated that circulating miR-208b and miR-34a could be useful biomarkers for predicting left ventricular remodeling after AMI, and the miRNA levels are associated with increased risk of mortality or heart failure.
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Guéant JL, Dong S, Guéant-Rodriguez RM, Blanca M, Mertes PM. Reply to J. Leysen et al. Clin Exp Allergy 2014; 44:459. [DOI: 10.1111/cea.12278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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93
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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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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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. GENETICS AND MOLECULAR RESEARCH 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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 08/12/2013] [Accepted: 08/20/2013] [Indexed: 11/28/2022]
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Dong S, Li FQ, Zhang Q, Lv KZ, Yang HL, Gao Y, Yu JR. Expression and clinical significance of SHP2 in gastric cancer. J Int Med Res 2013; 40:2083-9. [PMID: 23321164 DOI: 10.1177/030006051204000605] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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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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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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