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Feng L, Hua C, Sun H, Qin LY, Niu PP, Guo ZN, Yang Y. Association between Serum Uric Acid Level and Carotid Atherosclerosis in Chinese Individuals Aged 75 Years or Older: A Hospital-Based Case-Control Study. J Nutr Health Aging 2018; 22:508-512. [PMID: 29582890 DOI: 10.1007/s12603-017-0984-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVES To investigate the association between serum uric acid level and the presence and progression of carotid atherosclerosis in Chinese individuals aged 75 years or older. DESIGN Case-control study. SETTING In a teaching hospital. PARTICIPANTS Five hundred and sixty-four elderlies (75 years or above) who underwent general health screening in our hospital were enrolled. MEASUREMENTS The detailed carotid ultrasound results, physical examination information, medical history, and laboratory test results including serum uric acid level were recorded, these data were used to analyze the relationship between serum uric acid level and carotid atherosclerosis. Then, subjects who underwent the second carotid ultrasound 1.5-2 years later were further identified to analyzed the relationship between serum uric acid and the progression of carotid atherosclerosis. RESULTS A total of 564 subjects were included, carotid plaque was found in 482 (85.5%) individuals. Logistic regression showed that subjects with elevated serum uric acid (expressed per 1 standard deviation change) had significantly higher incidence of carotid plaque (odds ratio, 1.37; 95% confidence interval, 1.07-1.75; P= 0.012) after controlling for other factors. A total of 236 subjects underwent the follow-up carotid ultrasound. Linear regression showed that serum uric acid level (expressed per 1 standard deviation change; 1 standard deviation = 95.5 μmol/L) was significantly associated with percentage of change of plaque score (P = 0.008). Multivariable linear regression showed that 1 standard deviation increase in serum uric acid levels was expected to increase 0.448% of plaque score (P = 0.023). CONCLUSION The elevated serum uric acid level may be independently and significantly associated with the presence and progression of carotid atherosclerosis in Chinese individuals aged 75 years or older.
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Shi XT, Liu YZ, Tang YQ, Feng L, Zhang LQ. Kinetics and pathways of Bezafibrate degradation in UV/chlorine process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:672-682. [PMID: 29058257 DOI: 10.1007/s11356-017-0461-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 10/09/2017] [Indexed: 05/28/2023]
Abstract
UV/chlorine, as a novel disinfection method, has attracted great interest due to its effective removal for pathogenic microorganism and degradation of trace organic contaminants existed in water environment. This paper investigated the degradation kinetics and pathways of Bezafibrate (BZF), a typical antilipemic drug, during UV/chlorine process. The results showed that 92.3% of BZF was degraded after 20 min in UV/chlorine process. This indicated HO• and reactive chlorine species (RCSs) formed in UV/chlorine played the dominant role in degrading BZF. Observed rate constants of BZF degradation (k obs,BZF) in UV/chlorine process increased linearly in a wide chlorine dosage from 0.1 to 1.0 mM, which implied that ClO• generated from the reactions of chlorine with HO• and Cl• could react with BZF rapidly. The steady-state kinetic modeling result proved this deduction and the rate constant of ClO• with BZF was fitted to be 5.0 × 108 M-1 s-1. k obs,BZF was affected by Cl- and HA. The total contribution of RCSs (including Cl•, Cl2•-, and ClO•) to the degradation of BZF was determined to be ~ 80%, which is much higher than that of HO•. Thirteen degradation products of BZF were identified by LC-MS/MS. Initial degradation products were arisen from hydroxylation, chlorine substitution and cyclization by HO• and RCSs, and then further oxidized to generate acylamino cleavage and demethylation products.
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Yang J, Vázquez L, Feng L, Liu Z, Zhao G. Climatic and Soil Factors Shape the Demographical History and Genetic Diversity of a Deciduous Oak ( Quercus liaotungensis) in Northern China. FRONTIERS IN PLANT SCIENCE 2018; 9:1534. [PMID: 30410498 PMCID: PMC6209687 DOI: 10.3389/fpls.2018.01534] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 09/28/2018] [Indexed: 05/20/2023]
Abstract
Past and current climatic changes have affected the demography, patterns of genetic diversity, and genetic structure of extant species. The study of these processes provides valuable information to forecast evolutionary changes and to identify conservation priorities. Here, we sequenced two functional nuclear genes and four chloroplast DNA regions for 105 samples from 21 populations of Quercus liaotungensis across its distribution range. Coalescent-based Bayesian analysis, approximate Bayesian computation (ABC), and ecological niche modeling (ENM) were integrated to investigate the genetic patterns and demographical history of this species. Association estimates including Mantel tests and multiple linear regressions were used to infer the effects of geographical and ecological factors on temporal genetic variation and diversity of this oak species. Based on multiple loci, Q. liaotungensis populations clustered into two phylogenetic groups; this grouping pattern could be the result of adaptation to habitats with different temperature and precipitation seasonality conditions. Demographical reconstructions and ENMs suggest an expansion decline trend of this species during the Quaternary climatic oscillations. Association analyses based on nuclear data indicated that intraspecific genetic differentiation of Q. liaotungensis was clearly correlated with ecological distance; specifically, the genetic diversity of this species was significantly correlated with temperature seasonality and soil pH, but negatively correlated with precipitation. Our study highlights the impact of Pleistocene climate oscillations on the demographic history of a tree species in Northern China, and suggests that climatic and soil conditions are the major factors shaping the genetic diversity and population structure of Q. liaotungensis.
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1079
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Wang Z, Zhao SM, Hu YY, Feng L, Zhao LM, Di YT, Tan NH. Rubipodanones A-D, naphthohydroquinone dimers from the roots and rhizomes of Rubia podantha. PHYTOCHEMISTRY 2018; 145:153-160. [PMID: 29132078 DOI: 10.1016/j.phytochem.2017.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/30/2017] [Accepted: 11/01/2017] [Indexed: 06/07/2023]
Abstract
Four previously undescribed naphthohydroquinone dimers named rubipodanones A-D, together with 19 known quinones containing three known napthohydroquinone dimers named rubioncolin C, methyl 5-hydroxy-dinaphtho[1,2-2',3']furan-7,12-dione-6-carboxylate and rubialatin B, were isolated from the roots and rhizomes of Rubia podantha. Their structures and absolute configurations were determined mainly by NMR, X-ray diffraction, and computational methods. Rubipodanones C and D, the glycosides of rubipodanone A and a pair of C-3 epimer, are the first identified dimeric napthohydroquinone glycosides from the Rubia plants. All naphthohydroquinone dimers were evaluated for their cytotoxicities against ten tumor cell lines and effects on the tumor-associated NF-κB signaling pathway, and rubioncolin C showed the best cytotoxicity with IC50 value of 1.53 μM and NF-κB inhibitory activity with IC50 value of 2.97 μM. These results also demonstrated that the key roles of C-3 configuration and sugar group for biological activities of rubipodanone C.
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1080
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Yan Y, Zhang L, Feng L, Sun D, Dang Y. Comparison of varying operating parameters on heavy metals ecological risk during anaerobic co-digestion of chicken manure and corn stover. BIORESOURCE TECHNOLOGY 2018; 247:660-668. [PMID: 28988052 DOI: 10.1016/j.biortech.2017.09.146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 09/19/2017] [Accepted: 09/21/2017] [Indexed: 06/07/2023]
Abstract
In this study, the potential ecological risk of heavy metals (Mn, Zn, Cu, Ni, As, Cd, Pb, Cr) accumulation from anaerobic co-digestion of chicken manure (CM) and corn stover (CS) was evaluated by comparing different initial substrate concentrations, digestion temperatures, and mixture ratios. Results showed that the highest volumetric methane yield of 20.3±1.4L/L reactor was achieved with a CS:CM ratio of 3:1 (on volatile solid basis) in mesophilic solid state anaerobic digestion (SS-AD). Although co-digestion increased the concentrations of all tested heavy metals and the direct toxicity of some heavy metals, the potential ecological risk index indicated that the digestates were all classified as low ecological risk. The biogasification and risk variation of heavy metals were affected by the operating parameters. These results are significant and should be taken into consideration when optimizing co-digestion of animal manure and crop residues during full-scale projects.
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1081
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Huang X, Li LD, Lyu GM, Shen BY, Han YF, Shi JL, Teng JL, Feng L, Si SY, Wu JH, Liu YJ, Sun LD, Yan CH. Chitosan-coated cerium oxide nanocubes accelerate cutaneous wound healing by curtailing persistent inflammation. Inorg Chem Front 2018. [DOI: 10.1039/c7qi00707h] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chitosan-coated ceria nanocubes accelerate cutaneous wound healing by curtailing persistent inflammation with powerful anti-inflammation and anti-oxidation properties.
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1082
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Han M, Qi X, Bi D, Li Y, Guo Y, Wang X, Feng L. Administration of raloxifene hydrochloride nanosuspensions partially attenuates bone loss in ovariectomized mice. RSC Adv 2018; 8:23748-23756. [PMID: 35540259 PMCID: PMC9081861 DOI: 10.1039/c8ra02535e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 06/19/2018] [Indexed: 11/28/2022] Open
Abstract
Postmenopausal osteoporosis is a systemic skeletal disease of fragility fractures due to the loss of the mass and the deterioration of the microarchitecture of bone. This study aimed to assess the effects of raloxifene hydrochloride nanosuspensions (RLX-NSps) on ovariectomized (OVX)-induced osteoporotic rats, and the underlying mechanisms were also investigated in vivo and ex vivo. RLX-NSps were successfully prepared, and the obtained RLX-NSps had a mean particle size of (91.17 ± 0.73) nm, PDI value of 0.201 ± 0.03 and zeta potential of (36.3 ± 1.8) mV. RLX-NSps showed a clear colloidal solution with light yellow opalescence. RLX-NSps were stable in artificial intestinal fluid, artificial gastric fluid, PBS, isotonic glucose and physiological saline. The OVX mice were administered an RLX-NSps or RLX solution for 3 weeks. The bone micro-tomographic histomorphometry and bone mineral density (BMD) were assessed by micro-CT, and the biochemical markers procollagen type I N-terminal propeptide (P1NP) and beta-isomerized C-telopeptide (β-CTX) were determined from serum. Finally, primary bone marrow stromal cells (BMSCs) were isolated from the tibia and cultured to evaluate cell proliferation and osteogenic differentiation. The results demonstrated that the RLX-NSp group had a better effect on the bone microarchitecture than the RLX solution group. Therefore, RLX-NSps could partially attenuate bone loss more effectively than RLX solution in OVX mice by inhibiting bone resorption and improving the ability of BMSCs to proliferate and their osteogenic differentiation to some extent. Based on these results, nanosuspensions (NSps) may be a promising delivery system for postmenopausal osteoporosis therapy. RLX-NSps could partially attenuate bone loss more effectively than RLX solution in OVX mice by inhibiting bone resorption and improving the ability of BMSCs to proliferate and their osteogenic differentiation to some extent.![]()
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Liu Y, Xiao Y, Liu J, Feng L, Kang YJ. Copper-induced reduction in myocardial fibrosis is associated with increased matrix metalloproteins in a rat model of cardiac hypertrophy. Metallomics 2018; 10:201-208. [PMID: 29302675 DOI: 10.1039/c7mt00165g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AAC induces Cu loss from the heart and depressed MMP-2 in combination with increased TIMPs, leading to increased collagen deposition. TETA replenishes Cu in the heart, increases MMP-2, and decreases TIMP-1 and -2, collectively resulting in reduction in cardiac fibrosis.
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1084
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Feng L, Zheng H, Tang X, Zheng X, Liu S, Sun Q, Wang M. The investigation of the specific behavior of a cationic block structure and its excellent flocculation performance in high-turbidity water treatment. RSC Adv 2018; 8:15119-15133. [PMID: 35541323 PMCID: PMC9079996 DOI: 10.1039/c8ra02006j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 04/07/2018] [Indexed: 11/21/2022] Open
Abstract
The fabrication of a cationic polyacrylamide (CPAM) with high efficiency and economy has been highly desired in the field of high-turbidity water treatment. This study introduced an ultrasound (US)-initiated template polymerization (UTP) method to develop a novel cationic templated polyacrylamide (TPAA) with a microblock structure. TPAA was prepared using acrylamide (AM) and sodium (3-acrylamidopropyl)trimethylammonium chloride (ATAC) as the monomers and sodium polyacrylate (NaPAA) as the template. Factors that affected polymerization such as the ultrasound power, ultrasound time, initiator concentration, pH, and mAM : mATAC and nNaPAA : nATAC values were investigated. The properties of the polymers were characterized by Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance spectroscopy (1H NMR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The results indicated the successful formation of a cationic microblock structure in TPAA. In addition, TPAA displayed favorable thermal decomposition properties and a rough and coarse surface morphology, as shown by analyses using TGA and SEM, respectively. Moreover, a zip (type I) template polymerization mechanism was identified via analyses of the association constant (KM), conversion (Cv) and polymerization rate (Rp). The flocculation performance of the templated copolymer TPAA was evaluated by treating high-turbidity water. According to the results for the zeta potentials and FTIR spectra of the generated flocs, it was indicated that the cationic microblocks in the templated copolymer could greatly enhance its charge neutralization, patching and bridging ability, and therefore excellent flocculation performance (residual turbidity: 5.8 NTU, Df: 1.89, floc size d50: 608.404 μm and floc kinetic: 15.86 × 10−4 s−1) for treating high-turbidity water was achieved. The fabrication of a cationic polyacrylamide (CPAM) with high efficiency and economy has been highly desired in the field of high-turbidity water treatment.![]()
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Feng L. Letter to the editor: Responses. Long-Term Tea Consumption and Depressive and Anxiety Symptoms in Elderly. J Prev Alzheimers Dis 2018; 5:87. [PMID: 29405240 DOI: 10.14283/jpad.2018.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Responses: We thank Dr Joob and Dr Wiwanitkit for their interest in our research work and the valuable comments and suggestions they have provided. I fully agree with them that some uncontrolled factors, such as the intake of other foods, beverages or activities, may help protect against depressive and anxiety symptoms, and hence residual confounding cannot be completely ruled out. Further investigation is needed for a definitive conclusion. Indeed, motivated by growing evidence on neuroprotective benefits of tea consumption (1), my coworkers and I are now planning a new study in which we aim to assess the effects of tea drinking on brain health in a randomized controlled trial.
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Su X, Huang J, Yan B, Hong Z, Li S, Pang B, Luo Y, Feng L, Zhou M, Xia Y. Hierarchical porous ZnMnO3 yolk–shell microspheres with superior lithium storage properties enabled by a unique one-step conversion mechanism. RSC Adv 2018; 8:31388-31395. [PMID: 35548254 PMCID: PMC9085610 DOI: 10.1039/c8ra05871g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 09/03/2018] [Indexed: 11/21/2022] Open
Abstract
ZnMnO3 has attracted enormous attention as a novel anode material for rechargeable lithium-ion batteries due to its high theoretical capacity. However, it suffers from capacity fading because of the large volumetric change during cycling. Here, porous ZnMnO3 yolk–shell microspheres are developed through a facile and scalable synthesis approach. This ZnMnO3 can effectively accommodate the large volume change upon cycling, leading to an excellent cycling stability. When applying this ZnMnO3 as the anode in lithium-ion batteries, it shows a remarkable reversible capacity (400 mA h g−1 at a current density of 400 mA g−1 and 200 mA h g−1 at 6400 mA g−1) and excellent cycling performance (540 mA h g−1 after 300 cycles at 400 mA g−1) due to its unique structure. Furthermore, a novel conversion reaction mechanism of the ZnMnO3 is revealed: ZnMnO3 is first converted into intermediate phases of ZnO and MnO, after which MnO is further reduced to metallic Mn while ZnO remains stable, avoiding the serious pulverization of the electrode brought about by lithiation of ZnO. ZnMnO3 has attracted enormous attention as a novel anode material for rechargeable lithium-ion batteries due to its high theoretical capacity.![]()
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Feng L, Li Y, Zeng W, Xia B, Zhou D, Zhou J. Enhancing effects of basic fibroblast growth factor and fibronectin on osteoblast adhesion to bone scaffolds for bone tissue engineering through extracellular matrix-integrin pathway. Exp Ther Med 2017; 14:6087-6092. [PMID: 29285162 DOI: 10.3892/etm.2017.5320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 03/10/2017] [Indexed: 10/18/2022] Open
Abstract
The present study aimed to investigate the effects of basic fibroblast growth factor (bFGF) and fibronectin (FN) on adhesion of osteoblasts seeded into bio-derived bone scaffolds. Rat calvarial osteoblasts were separated and their osteogenic phenotypes were determined by staining for alkaline phosphatase as well as alizarin red staining. The bio-derived bone scaffolds were prepared from the metaphysis of porcine femur and their physicochemical properties were assessed by scanning electron microscopy (SEM) and X-ray diffraction analysis. An MTT assay was used to detect the effects of bFGF and FN on osteoblast adhesion or proliferation on cell/scaffold constructs through blocking the extracellular matrix FN-integrin pathway by the Gly-Arg-Gly-Asp-Ser (GRGDS) peptide. Western blot analysis was used to measure the β1 integrin levels. Based on the adhesion of osteoblasts stimulated by various concentrations of bFGF (0.1, 1, 10 and 100 ng/ml) on bio-derived bone scaffolds modified by various concentrations of FN (0.1, 1, 10 and 100 µg/ml), the cell/scaffold constructs were divided into four groups: i) Control, non-stimulated and non-modified group; ii) 10 µg/ml FN-modified group; iii) 100 ng/ml bFGF-stimulated group; iv) 10 µg/ml FN + 100 ng/ml bFGF group. Cell proliferation curves acquired by MTT assay and micrographs obtained by SEM showed that the combination of bFGF and FN significantly improved cell adhesion, particularly in the 10 µg/ml FN + 100 ng/ml bFGF group vs. the other groups, and the effect on cell adhesion was inhibited by 1 mmol/l GRGDS peptide through the FN-integrin pathway. Western blot results showed that the combination of bFGF and FN significantly enhanced β1 integrin expression levels. These results suggested that osteoblasts stimulated by 100 ng/ml bFGF and bio-derived bone materials modified by 10 µg/ml FN should be combined to be applied in the bone tissue engineering.
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Wang ZF, Ma DG, Zhu Z, Mu YP, Yang YY, Feng L, Yang H, Liang JQ, Liu YY, Liu L, Lu HW. Astragaloside IV inhibits pathological functions of gastric cancer-associated fibroblasts. World J Gastroenterol 2017; 23:8512-8525. [PMID: 29358859 PMCID: PMC5752711 DOI: 10.3748/wjg.v23.i48.8512] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/29/2017] [Accepted: 11/22/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the inhibitory effect of astragaloside IV on the pathological functions of cancer-associated fibroblasts, and to explore the underlying mechanism. METHODS Paired gastric normal fibroblast (GNF) and gastric cancer-associated fibroblast (GCAF) cultures were established from resected tissues. GCAFs were treated with vehicle control or different concentrations of astragaloside IV. Conditioned media were prepared from GNFs, GCAFs, control-treated GCAFs, and astragaloside IV-treated GCAFs, and used to culture BGC-823 human gastric cancer cells. Proliferation, migration and invasion capacities of BGC-823 cells were determined by MTT, wound healing, and Transwell invasion assays, respectively. The action mechanism of astragaloside IV was investigated by detecting the expression of microRNAs and the expression and secretion of the oncogenic factor, macrophage colony-stimulating factor (M-CSF), and the tumor suppressive factor, tissue inhibitor of metalloproteinase 2 (TIMP2), in different groups of GCAFs. The expression of the oncogenic pluripotency factors SOX2 and NANOG in BGC-823 cells cultured with different conditioned media was also examined. RESULTS GCAFs displayed higher capacities to induce BGC-823 cell proliferation, migration, and invasion than GNFs (P < 0.01). Astragaloside IV treatment strongly inhibited the proliferation-, migration- and invasion-promoting capacities of GCAFs (P < 0.05 for 10 μmol/L, P < 0.01 for 20 μmol/L and 40 μmol/L). Compared with GNFs, GCAFs expressed a lower level of microRNA-214 (P < 0.01) and a higher level of microRNA-301a (P < 0.01). Astragaloside IV treatment significantly up-regulated microRNA-214 expression (P < 0.01) and down-regulated microRNA-301a expression (P < 0.01) in GCAFs. Reestablishing the microRNA expression balance subsequently suppressed M-CSF production (P < 0.01) and secretion (P < 0.05), and elevated TIMP2 production (P < 0.01) and secretion (P < 0.05). Consequently, the ability of GCAFs to increase SOX2 and NANOG expression in BGC-823 cells was abolished by astragaloside IV. CONCLUSION Astragaloside IV can inhibit the pathological functions of GCAFs by correcting their dysregulation of microRNA expression, and it is promisingly a potent therapeutic agent regulating tumor microenvironment.
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Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Erö J, Escalante Del Valle A, Flechl M, Friedl M, Frühwirth R, Ghete VM, Grossmann J, Hrubec J, Jeitler M, König A, Krammer N, Krätschmer I, Liko D, Madlener T, Mikulec I, Pree E, Rad N, Rohringer H, Schieck J, Schöfbeck R, Spanring M, Spitzbart D, Waltenberger W, Wittmann J, Wulz CE, Zarucki M, Chekhovsky V, Mossolov V, Suarez Gonzalez J, De Wolf EA, Di Croce D, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Flouris G, Lontkovskyi D, Lowette S, Marchesini I, Moortgat S, Moreels L, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Beghin D, Bilin B, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Dorney B, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Kalsi AK, Lenzi T, Luetic J, Maerschalk T, Marinov A, Seva T, Starling E, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Roskas C, Salva S, Tytgat M, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caputo C, Caudron A, David P, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Saggio A, Vidal Marono M, Wertz S, Zobec J, Aldá Júnior WL, Alves FL, Alves GA, Brito L, Correa Martins Junior M, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Coelho E, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Melo De Almeida M, Mora Herrera C, Mundim L, Nogima H, Sanchez Rosas LJ, Santoro A, Sznajder A, Thiel M, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Tomei TRFP, Gregores EM, Mercadante PG, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodozov M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Fang W, Gao X, Yuan L, Ahmad M, Bian JG, Chen GM, Chen HS, Chen M, Chen Y, Jiang CH, Leggat D, Liao H, Liu Z, Romeo F, Shaheen SM, Spiezia A, Tao J, Wang C, Wang Z, Yazgan E, Zhang H, Zhang S, Zhao J, Ban Y, Chen G, Li J, Li Q, Liu S, Mao Y, Qian SJ, Wang D, Xu Z, Zhang F, Wang Y, Avila C, Cabrera A, Chaparro Sierra LF, Florez C, González Hernández CF, Ruiz Alvarez JD, Segura Delgado MA, Courbon B, Godinovic N, Lelas D, Puljak I, Ribeiro Cipriano PM, Sculac T, Antunovic Z, Kovac M, Brigljevic V, Ferencek D, Kadija K, Mesic B, Starodumov A, Susa T, Ather MW, Attikis A, Mavromanolakis G, Mousa J, Nicolaou C, Ptochos F, Razis PA, Rykaczewski H, Finger M, Finger M, Carrera Jarrin E, Assran Y, Elgammal S, Mahrous A, Dewanjee RK, Kadastik M, Perrini L, Raidal M, Tiko A, Veelken C, Eerola P, Kirschenmann H, Pekkanen J, Voutilainen M, Havukainen J, Heikkilä JK, Järvinen T, Karimäki V, Kinnunen R, Lampén T, Lassila-Perini K, Laurila S, Lehti S, Lindén T, Luukka P, Siikonen H, Tuominen E, Tuominiemi J, Tuuva T, Besancon M, Couderc F, Dejardin M, Denegri D, Faure JL, Ferri F, Ganjour S, Ghosh S, Gras P, Hamel de Monchenault G, Jarry P, Kucher I, Leloup C, Locci E, Machet M, Malcles J, Negro G, Rander J, Rosowsky A, Sahin MÖ, Titov M, Abdulsalam A, Amendola C, Antropov I, Baffioni S, Beaudette F, Busson P, Cadamuro L, Charlot C, Granier de Cassagnac R, Jo M, Lisniak S, Lobanov A, Martin Blanco J, Nguyen M, Ochando C, Ortona G, Paganini P, Pigard P, Salerno R, Sauvan JB, Sirois Y, Stahl Leiton AG, Strebler T, Yilmaz Y, Zabi A, Zghiche A, Agram JL, Andrea J, Bloch D, Brom JM, Buttignol M, Chabert EC, Chanon N, Collard C, Conte E, Coubez X, Fontaine JC, Gelé D, Goerlach U, Jansová M, Le Bihan AC, Tonon N, Van Hove P, Gadrat S, Beauceron S, Bernet C, Boudoul G, Chierici R, Contardo D, Depasse P, El Mamouni H, Fay J, Finco L, Gascon S, 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Melo A, Ni H, Padeken K, Sheldon P, Tuo S, Velkovska J, Xu Q, Arenton MW, Barria P, Cox B, Hirosky R, Joyce M, Ledovskoy A, Li H, Neu C, Sinthuprasith T, Wang Y, Wolfe E, Xia F, Harr R, Karchin PE, Poudyal N, Sturdy J, Thapa P, Zaleski S, Brodski M, Buchanan J, Caillol C, Dasu S, Dodd L, Duric S, Gomber B, Grothe M, Herndon M, Hervé A, Hussain U, Klabbers P, Lanaro A, Levine A, Long K, Loveless R, Ruggles T, Savin A, Smith N, Smith WH, Taylor D, Woods N. Observation of Top Quark Production in Proton-Nucleus Collisions. PHYSICAL REVIEW LETTERS 2017; 119:242001. [PMID: 29286735 DOI: 10.1103/physrevlett.119.242001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Indexed: 06/07/2023]
Abstract
The first observation of top quark production in proton-nucleus collisions is reported using proton-lead data collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of sqrt[s_{NN}]=8.16 TeV. The measurement is performed using events with exactly one isolated electron or muon candidate and at least four jets. The data sample corresponds to an integrated luminosity of 174 nb^{-1}. The significance of the tt[over ¯] signal against the background-only hypothesis is above 5 standard deviations. The measured cross section is σ_{tt[over ¯]}=45±8 nb, consistent with predictions from perturbative quantum chromodynamics.
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Chistov R, Danilov M, Polikarpov S, Andreev V, Azarkin M, Dremin I, Kirakosyan M, Terkulov A, Baskakov A, Belyaev A, Boos E, Dubinin M, Dudko L, Ershov A, Gribushin A, Klyukhin V, Kodolova O, Lokhtin I, Miagkov I, Obraztsov S, Petrushanko S, Savrin V, Snigirev A, Blinov V, Skovpen Y, Shtol D, Azhgirey I, Bayshev I, Bitioukov S, Elumakhov D, Kachanov V, Kalinin A, Konstantinov D, Krychkine V, Petrov V, Ryutin R, Sobol A, Troshin S, Tyurin N, Uzunian A, Volkov A, Adzic P, Cirkovic P, Devetak D, Dordevic M, Milosevic J, Rekovic V, Maestre JA, Luna MB, Cerrada M, Colino N, Cruz BDL, Peris AD, Del Valle AE, Bedoya CF, Ramos JPF, Flix J, Fouz MC, Garcia-Abia P, Lopez OG, Lopez SG, Hernandez JM, Josa MI, De Martino EN, Yzquierdo APC, Pelayo JP, Olmeda AQ, Redondo I, Romero L, Soares MS, de Trocóniz JF, Missiroli M, Moran D, Cuevas J, Erice C, Menendez JF, Caballero IG, Fernández JRG, Cortezon EP, Cruz SS, Andrés IS, Vischia P, Garcia JMV, Cabrillo IJ, Calderon A, Quero BC, Curras E, Fernandez M, Garcia-Ferrero J, Gomez G, Virto AL, Marco J, Rivero CM, Matorras F, Gomez JP, Rodrigo T, Ruiz-Jimeno A, Scodellaro L, Trevisani N, Vila I, Cortabitarte RV, Abbaneo D, Auffray E, Baillon P, Ball AH, Barney D, Bianco M, Bloch P, Bocci A, Botta C, Camporesi T, Castello R, Cepeda M, Cerminara G, Chen Y, d’Enterria D, Dabrowski A, Daponte V, David A, De Gruttola M, De Roeck A, Di Marco E, Dobson M, Dorney B, du Pree T, Dünser M, Dupont N, Elliott-Peisert A, Everaerts P, Franzoni G, Fulcher J, Funk W, Gigi D, Gill K, Glege F, Gulhan D, Gundacker S, Guthoff M, Harris P, Hegeman J, Innocente V, Janot P, Kieseler J, Kirschenmann H, Knünz V, Kornmayer A, Kortelainen MJ, Lange C, Lecoq P, Lourenço C, Lucchini MT, Malgeri L, Mannelli M, Martelli A, Meijers F, Merlin JA, Mersi S, Meschi E, Milenovic P, Moortgat F, Mulders M, Neugebauer H, Orfanelli S, Orsini L, Pape L, Perez E, Peruzzi M, Petrilli A, Petrucciani G, Pfeiffer A, Pierini M, Racz A, Reis T, Rolandi G, Rovere M, Sakulin H, Sauvan JB, Schäfer C, Schwick C, Seidel M, Sharma A, Silva P, Sphicas P, Steggemann J, Stoye M, Tosi M, Treille D, Triossi A, Tsirou A, Veckalns V, Veres GI, Verweij M, Wardle N, Zagozdzinska A, Zeuner WD, Bertl W, Deiters K, Erdmann W, Horisberger R, Ingram Q, Kaestli HC, Kotlinski D, Langenegger U, Rohe T, Wiederkehr SA, Bachmair F, Bäni L, Bianchini L, Casal B, Dissertori G, Dittmar M, Donegà M, Grab C, Heidegger C, Hits D, Hoss J, Kasieczka G, Lustermann W, Mangano B, Marionneau M, del Arbol PMR, Masciovecchio M, Meinhard MT, Meister D, Micheli F, Musella P, Nessi-Tedaldi F, Pandolfi F, Pata J, Pauss F, Perrin G, Perrozzi L, Quittnat M, Rossini M, Schönenberger M, Starodumov A, Tavolaro VR, Theofilatos K, Wallny R, Aarrestad TK, Amsler C, Caminada L, Canelli MF, De Cosa A, Donato S, Galloni C, Hinzmann A, Hreus T, Kilminster B, Ngadiuba J, Pinna D, Rauco G, Robmann P, Salerno D, Seitz C, Yang Y, Zucchetta A, Candelise V, Doan TH, Jain S, Khurana R, Konyushikhin M, Kuo CM, Lin W, Pozdnyakov A, Yu SS, Kumar A, Chang P, Chang YH, Chao Y, Chen KF, Chen PH, Fiori F, Hou WS, Hsiung Y, Liu YF, Lu RS, Moya MM, Paganis E, Psallidas A, Tsai JF, Asavapibhop B, Kovitanggoon K, Singh G, Srimanobhas N, Adiguzel A, Bakirci MN, Boran F, Cerci S, Damarseckin S, Demiroglu ZS, Dozen C, Dumanoglu I, Girgis S, Gokbulut G, Guler Y, Hos I, Kangal EE, Kara O, Topaksu AK, Kiminsu U, Oglakci M, Onengut G, Ozdemir K, Tali B, Turkcapar S, Zorbakir IS, Zorbilmez C, Bilin B, Karapinar G, Ocalan K, Yalvac M, Zeyrek M, Gülmez E, Kaya M, Kaya O, Yetkin EA, Cakir A, Cankocak K, Grynyov B, Levchuk L, Sorokin P, Aggleton R, Ball F, Beck L, Brooke JJ, Burns D, Clement E, Cussans D, Flacher H, Goldstein J, Grimes M, Heath GP, Heath HF, Jacob J, Kreczko L, Lucas C, Newbold DM, Paramesvaran S, Poll A, Sakuma T, Nasr-storey SSE, Smith D, Smith VJ, Bell KW, Belyaev A, Brew C, Brown RM, Calligaris L, Cieri D, Cockerill DJA, Coughlan JA, Harder K, Harper S, Olaiya E, Petyt D, Shepherd-Themistocleous CH, Thea A, Tomalin IR, Williams T, Baber M, Bainbridge R, Buchmuller O, Bundock A, Casasso S, Citron M, Colling D, Corpe L, Dauncey P, Davies G, De Wit A, Della Negra M, Di Maria R, Dunne P, Elwood A, Futyan D, Haddad Y, Hall G, Iles G, James T, Lane R, Laner C, Lyons L, Magnan AM, Malik S, Mastrolorenzo L, Nash J, Nikitenko A, Pela J, Pesaresi M, Raymond DM, Richards A, Rose A, Scott E, Seez C, Summers S, Tapper A, Uchida K, Acosta MV, Virdee T, Wright J, Zenz SC, Cole JE, Hobson PR, Khan A, Kyberd P, Reid ID, Symonds P, Teodorescu L, Turner M, Borzou A, Call K, Dittmann J, Hatakeyama K, Liu H, Pastika N, Bartek R, Dominguez A, Buccilli A, Cooper SI, Henderson C, Rumerio P, West C, Arcaro D, Avetisyan A, Bose T, Gastler D, Rankin D, Richardson C, Rohlf J, Sulak L, Zou D, Benelli G, Cutts D, Garabedian A, Hakala J, Heintz U, Hogan JM, Kwok KHM, Laird E, Landsberg G, Mao Z, Narain M, Piperov S, Sagir S, Spencer E, Syarif R, Burns D, De La Barca Sanchez MC, Chertok M, Conway J, Conway R, Cox PT, Erbacher R, Flores C, Funk G, Gardner M, Ko W, Lander R, Mclean C, Mulhearn M, Pellett D, Pilot J, Shalhout S, Shi M, Smith J, Squires M, Stolp D, Tos K, Tripathi M, Bachtis M, Bravo C, Cousins R, Dasgupta A, Florent A, Hauser J, Ignatenko M, Mccoll N, Saltzberg D, Schnaible C, Valuev V, Bouvier E, Burt K, Clare R, Ellison J, Gary JW, Shirazi SMAG, Hanson G, Heilman J, Jandir P, Kennedy E, Lacroix F, Long OR, Negrete MO, Paneva MI, Shrinivas A, Si W, Wei H, Wimpenny S, Yates BR, Branson JG, Cerati GB, Cittolin S, Derdzinski M, Holzner A, Klein D, Kole G, Krutelyov V, Letts J, Macneill I, Olivito D, Padhi S, Pieri M, Sani M, Sharma V, Simon S, Tadel M, Vartak A, Wasserbaech S, Würthwein F, Yagil A, Della Porta GZ, Amin N, Bhandari R, Bradmiller-Feld J, Campagnari C, Dishaw A, Dutta V, Sevilla MF, George C, Golf F, Gouskos L, Gran J, Heller R, Incandela J, Mullin SD, Ovcharova A, Qu H, Richman J, Stuart D, Suarez I, Yoo J, Anderson D, Bendavid J, Bornheim A, Lawhorn JM, Newman HB, Pena C, Spiropulu M, Vlimant JR, Xie S, Zhu RY, Andrews MB, Ferguson T, Paulini M, Russ J, Sun M, Vogel H, Vorobiev I, Weinberg M, Cumalat JP, Ford WT, Jensen F, Johnson A, Krohn M, Leontsinis S, Mulholland T, Stenson K, Wagner SR, Alexander J, Chaves J, Chu J, Dittmer S, Mcdermott K, Mirman N, Patterson JR, Rinkevicius A, Ryd A, Skinnari L, Soffi L, Tan SM, Tao Z, Thom J, Tucker J, Wittich P, Zientek M, Winn D, Abdullin S, Albrow M, Apollinari G, Apresyan A, Banerjee S, Bauerdick LAT, Beretvas A, Berryhill J, Bhat PC, Bolla G, Burkett K, Butler JN, Canepa A, Cheung HWK, Chlebana F, Cremonesi M, Duarte J, Elvira VD, Fisk I, Freeman J, Gecse Z, Gottschalk E, Gray L, Green D, Grünendahl S, Gutsche O, Harris RM, Hasegawa S, Hirschauer J, Hu Z, Jayatilaka B, Jindariani S, Johnson M, Joshi U, Klima B, Kreis B, Lammel S, Lincoln D, Lipton R, Liu M, Liu T, De Sá RL, Lykken J, Maeshima K, Magini N, Marraffino JM, Maruyama S, Mason D, McBride P, Merkel P, Mrenna S, Nahn S, O’Dell V, Pedro K, Prokofyev O, Rakness G, Ristori L, Schneider B, Sexton-Kennedy E, Soha A, Spalding WJ, Spiegel L, Stoynev S, Strait J, Strobbe N, Taylor L, Tkaczyk S, Tran NV, Uplegger L, Vaandering EW, Vernieri C, Verzocchi M, Vidal R, Wang M, Weber HA, Whitbeck A, Acosta D, Avery P, Bortignon P, Brinkerhoff A, Carnes A, Carver M, Curry D, Das S, Field RD, Furic IK, Konigsberg J, Korytov A, Kotov K, Ma P, Matchev K, Mei H, Mitselmakher G, Rank D, Shchutska L, Sperka D, Terentyev N, Thomas L, Wang J, Wang S, Yelton J, Linn S, Markowitz P, Martinez G, Rodriguez JL, Ackert A, Adams T, Askew A, Bein S, Hagopian S, Hagopian V, Johnson KF, Kolberg T, Perry T, Prosper H, Santra A, Yohay R, Baarmand MM, Bhopatkar V, Colafranceschi S, Hohlmann M, Noonan D, Roy T, Yumiceva F, Adams MR, Apanasevich L, Berry D, Betts RR, Cavanaugh R, Chen X, Evdokimov O, Gerber CE, Hangal DA, Hofman DJ, Jung K, Kamin J, Gonzalez IDS, Tonjes MB, Trauger H, Varelas N, Wang H, Wu Z, Zhang J, Bilki B, Clarida W, Dilsiz K, Durgut S, Gandrajula RP, Haytmyradov M, Khristenko V, Merlo JP, Mermerkaya H, Mestvirishvili A, Moeller A, Nachtman J, Ogul H, Onel Y, Ozok F, Penzo A, Snyder C, Tiras E, Wetzel J, Yi K, Blumenfeld B, Cocoros A, Eminizer N, Fehling D, Feng L, Gritsan AV, Maksimovic P, Roskes J, Sarica U, Swartz M, Xiao M, You C, Al-bataineh A, Baringer P, Bean A, Boren S, Bowen J, Castle J, Khalil S, Kropivnitskaya A, Majumder D, Mcbrayer W, Murray M, Royon C, Sanders S, Stringer R, Takaki JDT, Wang Q, Ivanov A, Kaadze K, Maravin Y, Mohammadi A, Saini LK, Skhirtladze N, Toda S, Rebassoo F, Wright D, Anelli C, Baden A, Baron O, Belloni A, Calvert B, Eno SC, Ferraioli C, Hadley NJ, Jabeen S, Jeng GY, Kellogg RG, Kunkle J, Mignerey AC, Ricci-Tam F, Shin YH, Skuja A, Tonwar SC, Abercrombie D, Allen B, Apyan A, Azzolini V, Barbieri R, Baty A, Bi R, Bierwagen K, Brandt S, Busza W, Cali IA, D’Alfonso M, Demiragli Z, Ceballos GG, Goncharov M, Hsu D, Iiyama Y, Innocenti GM, Klute M, Kovalskyi D, Lai YS, Lee YJ, Levin A, Luckey PD, Maier B, Marini AC, Mcginn C, Mironov C, Narayanan S, Niu X, Paus C, Roland C, Roland G, Salfeld-Nebgen J, Stephans GSF, Tatar K, Velicanu D, Wang J, Wang TW, Wyslouch B, Benvenuti AC, Chatterjee RM, Evans A, Hansen P, Kalafut S, Kao SC, Kubota Y, Lesko Z, Mans J, Nourbakhsh S, Ruckstuhl N, Rusack R, Tambe N, Turkewitz J, Acosta JG, Oliveros S, Avdeeva E, Bloom K, Claes DR, Fangmeier C, Suarez RG, Kamalieddin R, Kravchenko I, Monroy J, Siado JE, Snow GR, Stieger B, Alyari M, Dolen J, Godshalk A, Harrington C, Iashvili I, Kharchilava A, Parker A, Rappoccio S, Roozbahani B, Alverson G, Barberis E, Hortiangtham A, Massironi A, Morse DM, Nash D, Orimoto T, De Lima RT, Trocino D, Wang RJ, Wood D, Bhattacharya S, Charaf O, Hahn KA, Mucia N, Odell N, Pollack B, Schmitt MH, Semova S, Sung K, Trovato M, Velasco M, Dev N, Hildreth M, Anampa KH, Jessop C, Karmgard DJ, Kellams N, Lannon K, Loukas N, Marinelli N, Meng F, Mueller C, Musienko Y, Planer M, Reinsvold A, Ruchti R, Rupprecht N, Smith G, Taroni S, Wayne M, Wolf M, Woodard A, Alimena J, Antonelli L, Bylsma B, Durkin LS, Flowers S, Francis B, Hart A, Hill C, Ji W, Liu B, Luo W, Puigh D, Winer BL, Wulsin HW, Benaglia A, Cooperstein S, Driga O, Elmer P, Hardenbrook J, Hebda P, Lange D, Luo J, Marlow D, Mei K, Ojalvo I, Olsen J, Palmer C, Piroué P, Stickland D, Svyatkovskiy A, Tully C, Malik S, Norberg S, Barker A, Barnes VE, Folgueras S, Gutay L, Jha MK, Jones M, Jung AW, Khatiwada A, Miller DH, Neumeister N, Schulte JF, Sun J, Wang F, Xie W, Cheng T, Parashar N, Stupak J, Adair A, Akgun B, Chen Z, Ecklund KM, Geurts FJM, Guilbaud M, Li W, Michlin B, Northup M, Padley BP, Roberts J, Rorie J, Tu Z, Zabel J, Betchart B, Bodek A, de Barbaro P, Demina R, Duh YT, Ferbel T, Galanti M, Garcia-Bellido A, Han J, Hindrichs O, Khukhunaishvili A, Lo KH, Tan P, Verzetti M, Ciesielski R, Goulianos K, Mesropian C, Agapitos A, Chou JP, Gershtein Y, Espinosa TAG, Halkiadakis E, Heindl M, Hughes E, Kaplan S, Elayavalli RK, Kyriacou S, Lath A, Montalvo R, Nash K, Osherson M, Saka H, Salur S, Schnetzer S, Sheffield D, Somalwar S, Stone R, Thomas S, Thomassen P, Walker M, Foerster M, Heideman J, Riley G, Rose K, Spanier S, Thapa K, Bouhali O, Hernandez AC, Celik A, Dalchenko M, De Mattia M, Delgado A, Dildick S, Eusebi R, Gilmore J, Huang T, Kamon T, Mueller R, Pakhotin Y, Patel R, Perloff A, Perniè L, Rathjens D, Safonov A, Tatarinov A, Ulmer KA, Akchurin N, Damgov J, De Guio F, Dragoiu C, Dudero PR, Faulkner J, Gurpinar E, Kunori S, Lamichhane K, Lee SW, Libeiro T, Peltola T, Undleeb S, Volobouev I, Wang Z, Greene S, Gurrola A, Janjam R, Johns W, Maguire C, Melo A, Ni H, Sheldon P, Tuo S, Velkovska J, Xu Q, Arenton MW, Barria P, Cox B, Hirosky R, Ledovskoy A, Li H, Neu C, Sinthuprasith T, Sun X, Wang Y, Wolfe E, Xia F, Clarke C, Harr R, Karchin PE, Sturdy J, Zaleski S, Belknap DA, Buchanan J, Caillol C, Dasu S, Dodd L, Duric S, Gomber B, Grothe M, Herndon M, Hervé A, Hussain U, Klabbers P, Lanaro A, Levine A, Long K, Loveless R, Pierro GA, Polese G, Ruggles T, Savin A, Smith N, Smith WH, Taylor D, Woods N. Search for dark matter produced in association with heavy-flavor quark pairs in proton-proton collisions at s = 13 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS 2017; 77:845. [PMID: 31985736 PMCID: PMC6954044 DOI: 10.1140/epjc/s10052-017-5317-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 10/17/2017] [Indexed: 06/09/2023]
Abstract
A search is presented for an excess of events with heavy-flavor quark pairs ( t t ¯ and b b ¯ ) and a large imbalance in transverse momentum in data from proton-proton collisions at a center-of-mass energy of 13TeV . The data correspond to an integrated luminosity of 2.2fb - 1 collected with the CMS detector at the CERN LHC. No deviations are observed with respect to standard model predictions. The results are used in the first interpretation of dark matter production in t t ¯ and b b ¯ final states in a simplified model. This analysis is also the first to perform a statistical combination of searches for dark matter produced with different heavy-flavor final states. The combination provides exclusions that are stronger than those achieved with individual heavy-flavor final states.
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Grants
- Austrian Federal Ministry of Science, Research and Economy
- Austrian Science Fund
- Belgian Fonds de la Recherche Scientifique
- Belgian Fonds voor Wetenschappelijk Onderzoek
- CNPq
- CAPES
- FAPERJ
- FAPESP
- Bulgarian Ministry of Education and Science
- CERN
- Chinese Academy of Sciences
- Ministry of Science and Technology
- Chinese National Natural Science Foundation of China
- Colombian Funding Agency (COLCIENCIAS)
- Croatian Ministry of Science, Education and Sport
- Croatian Science Foundation
- Research Promotion Foundation
- SENESCYT
- Ministry of Education and Research
- Estonian Research Council via IUT23-4 and IUT23-6
- European Regional Development Fund
- Academy of Finland
- Finnish Ministry of Education and Culture
- Helsinki Institute of Physics
- Institut National de Physique Nucléaire et de Physique des Particules
- Centre National de la Recherche Scientifique
- Commissariat à l’Énergie Atomique et aux Énergies Alternatives
- Bundesministerium für Bildung und Forschung
- Deutsche Forschungsgemeinschaft
- Helmholtz-Gemeinschaft Deutscher Forschungszentren
- General Secretariat for Research and Technology
- National Scientific Research Foundation
- National Innovation Office
- Department of Atomic Energy
- Department of Science and Technology
- Institute for Research in Fundamental Studies
- Science Foundation
- Istituto Nazionale di Fisica Nucleare
- Korean Ministry of Education, Science and Technology
- National Research Foundation of Korea (NRF)
- Lithuanian Academy of Sciences
- Ministry of Education
- University of Malaya
- BUAP
- CINVESTAV
- CONACYT
- LNS
- SEP
- UASLP
- Ministry of Business, Innovation and Employment
- Pakistan Atomic Energy Commission
- Ministry of Science and Higher Education
- National Science Centre
- Fundação para a Ciência e a Tecnologia
- JINR, Dubna
- Ministry of Education and Science of the Russian Federation
- Federal Agency of Atomic Energy of the Russian Federation
- Russian Academy of Sciences
- Russian Foundation for Basic Research
- Ministry of Education, Science and Technological Development of Serbia
- Secretaría de Estado de Investigación, Desarrollo e Innovación
- Programa Consolider-Ingenio 2010
- ETH Board
- ETH Zurich
- PSI
- SNF
- UniZH
- Canton Zurich
- SER
- Ministry of Science and Technology
- Thailand Center of Excellence in Physics
- Institute for the Promotion of Teaching Science and Technology of Thailand
- Special Task Force for Activating Research
- National Science and Technology Development Agency of Thailand
- Scientific and Technical Research Council of Turkey
- Turkish Atomic Energy Authority
- National Academy of Sciences of Ukraine
- State Fund for Fundamental Researches
- Science and Technology Facilities Council
- US Department of Energy
- US National Science Foundation
- Marie-Curie programme
- European Research Council and EPLANET (European Union)
- Leventis Foundation
- Alfred P. Sloan Foundation
- Alexander von Humboldt Foundation
- Belgian Federal Science Policy Office
- Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture (FRIA-Belgium)
- Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)
- Ministry of Education, Youth and Sports (MEYS) of the Czech Republic
- Council of Science and Industrial Research, India
- HOMING PLUS programme of Foundation for Polish Science, cofinanced from European Union, Regional Development Fund
- National Science Center, contracts Harmonia 2014/14/M/ST2/00428, Opus 2013/11/B/ST2/04202, 2014/13/B/ST2/02543 and 2014/15/B/ST2/03998, Sonata-bis 2012/07/E/ST2/01406
- Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF
- National Priorities Research Program by Qatar National Research Fund
- Programa Clarín-COFUND del Principado de Asturias
- Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University (Thailand)
- CUAASC
- Welch Foundation, contract C-1845
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Zhang Y, Xu Y, Li F, Li X, Feng L, Shi X, Wang L, Li X. Dissecting dysfunctional crosstalk pathways regulated by miRNAs during glioma progression. Oncotarget 2017; 7:25769-82. [PMID: 27013589 PMCID: PMC5041942 DOI: 10.18632/oncotarget.8265] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 03/08/2016] [Indexed: 01/14/2023] Open
Abstract
Glioma is a malignant nervous system tumor with a high fatality rate and poor prognosis. MicroRNAs (miRNAs) are important post-transcriptional modulators of glioma initiation and progression. Tumor progression often results from dysfunctional co-operation between pathways regulated by miRNAs. We therefore constructed a glioma progression-related miRNA-pathway crosstalk network that not only revealed some key miRNA-pathway patterns, but also helped characterize the functional roles of miRNAs during glioma progression. Our data indicate that crosstalk between cell cycle and p53 pathways is associated with grade II to grade III progression, while cell communications-related pathways involving regulation of actin cytoskeleton and adherens junctions are associated with grade IV glioblastoma progression. Furthermore, miRNAs and their crosstalk pathways may be useful for stratifying glioma and glioblastoma patients into groups with short or long survival times. Our data indicate that a combination of miRNA and pathway crosstalk information can be used for survival prediction.
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1092
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Feng L, Zhang S, Zhu G, Li M, Liu J. Determination of trace polychlorinated biphenyls and organochlorine pesticides in water samples through large-volume stir bar sorptive extraction method with thermal desorption gas chromatography. J Sep Sci 2017; 40:4583-4590. [DOI: 10.1002/jssc.201700305] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 09/18/2017] [Accepted: 09/20/2017] [Indexed: 11/10/2022]
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Xia B, Li Y, Zhou J, Tian B, Feng L. Identification of potential pathogenic genes associated with osteoporosis. Bone Joint Res 2017; 6:640-648. [PMID: 29203636 PMCID: PMC5935809 DOI: 10.1302/2046-3758.612.bjr-2017-0102.r1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 08/24/2017] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Osteoporosis is a chronic disease. The aim of this study was to identify key genes in osteoporosis. METHODS Microarray data sets GSE56815 and GSE56814, comprising 67 osteoporosis blood samples and 62 control blood samples, were obtained from the Gene Expression Omnibus database. Differentially expressed genes (DEGs) were identified in osteoporosis using Limma package (3.2.1) and Meta-MA packages. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses were performed to identify biological functions. Furthermore, the transcriptional regulatory network was established between the top 20 DEGs and transcriptional factors using the UCSC ENCODE Genome Browser. Receiver operating characteristic (ROC) analysis was applied to investigate the diagnostic value of several DEGs. RESULTS A total of 1320 DEGs were obtained, of which 855 were up-regulated and 465 were down-regulated. These differentially expressed genes were enriched in Gene Ontology terms and Kyoto Encyclopedia of Genes and Genomes pathways, mainly associated with gene expression and osteoclast differentiation. In the transcriptional regulatory network, there were 6038 interactions pairs involving 88 transcriptional factors. In addition, the quantitative reverse transcriptase-polymerase chain reaction result validated the expression of several genes (VPS35, FCGR2A, TBCA, HIRA, TYROBP, and JUND). Finally, ROC analyses showed that VPS35, HIRA, PHF20 and NFKB2 had a significant diagnostic value for osteoporosis. CONCLUSION Genes such as VPS35, FCGR2A, TBCA, HIRA, TYROBP, JUND, PHF20, NFKB2, RPL35A and BICD2 may be considered to be potential pathogenic genes of osteoporosis and may be useful for further study of the mechanisms underlying osteoporosis.Cite this article: B. Xia, Y. Li, J. Zhou, B. Tian, L. Feng. Identification of potential pathogenic genes associated with osteoporosis. Bone Joint Res 2017;6:640-648. DOI: 10.1302/2046-3758.612.BJR-2017-0102.R1.
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Tan B, Zhang S, Qiang Y, Feng L, Liao C, Xu Y, Chen S. Investigation of the inhibition effect of Montelukast Sodium on the copper corrosion in 0.5 mol/L H2SO4. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.10.111] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lin W, Pozdnyakov A, Yu SS, Kumar A, Chang P, Chao Y, Chen KF, Chen PH, Fiori F, Hou WS, Hsiung Y, Liu YF, Lu RS, Paganis E, Psallidas A, Steen A, Tsai JF, Asavapibhop B, Kovitanggoon K, Singh G, Srimanobhas N, Adiguzel A, Boran F, Cerci S, Damarseckin S, Demiroglu ZS, Dozen C, Dumanoglu I, Girgis S, Gokbulut G, Guler Y, Hos I, Kangal EE, Kara O, Kayis Topaksu A, Kiminsu U, Oglakci M, Onengut G, Ozdemir K, Sunar Cerci D, Tali B, Turkcapar S, Zorbakir IS, Zorbilmez C, Bilin B, Karapinar G, Ocalan K, Yalvac M, Zeyrek M, Gülmez E, Kaya M, Kaya O, Tekten S, Yetkin EA, Agaras MN, Atay S, Cakir A, Cankocak K, Grynyov B, Levchuk L, Sorokin P, Aggleton R, Ball F, Beck L, Brooke JJ, Burns D, Clement E, Cussans D, Davignon O, Flacher H, Goldstein J, Grimes M, Heath GP, Heath HF, Jacob J, Kreczko L, Lucas C, Newbold DM, Paramesvaran S, Poll A, Sakuma T, Seif El Nasr-Storey S, Smith D, Smith VJ, Bell KW, Belyaev A, Brew C, Brown RM, Calligaris L, Cieri D, Cockerill DJA, Coughlan JA, Harder K, Harper S, Olaiya E, Petyt D, Shepherd-Themistocleous CH, Thea A, Tomalin IR, Williams T, Auzinger G, Bainbridge R, Breeze S, Buchmuller O, Bundock A, Casasso S, Citron M, Colling D, Corpe L, Dauncey P, Davies G, De Wit A, Della Negra M, Di Maria R, Elwood A, Haddad Y, Hall G, Iles G, James T, Lane R, Laner C, Lyons L, Magnan AM, Malik S, Mastrolorenzo L, Matsushita T, Nash J, Nikitenko A, Palladino V, Pesaresi M, Raymond DM, Richards A, Rose A, Scott E, Seez C, Shtipliyski A, Summers S, Tapper A, Uchida K, Vazquez Acosta M, Virdee T, Winterbottom D, Wright J, Zenz SC, Cole JE, Hobson PR, Khan A, Kyberd P, Reid ID, Symonds P, Teodorescu L, Turner M, Borzou A, Call K, Dittmann J, Hatakeyama K, Liu H, Pastika N, Smith C, Bartek R, Dominguez A, Buccilli A, Cooper SI, Henderson C, Rumerio P, West C, Arcaro D, Avetisyan A, Bose T, Gastler D, Rankin D, Richardson C, Rohlf J, Sulak L, Zou D, Benelli G, Cutts D, Garabedian A, Hakala J, Heintz U, Hogan JM, Kwok KHM, Laird E, Landsberg G, Mao Z, Narain M, Pazzini J, Piperov S, Sagir S, Syarif R, Yu D, Band R, Brainerd C, Burns D, Calderon De La Barca Sanchez M, Chertok M, Conway J, Conway R, Cox PT, Erbacher R, Flores C, Funk G, Gardner M, Ko W, Lander R, Mclean C, Mulhearn M, Pellett D, Pilot J, Shalhout S, Shi M, Smith J, Squires M, Stolp D, Tos K, Tripathi M, Wang Z, Bachtis M, Bravo C, Cousins R, Dasgupta A, Florent A, Hauser J, Ignatenko M, Mccoll N, Saltzberg D, Schnaible C, Valuev V, Bouvier E, Burt K, Clare R, Ellison J, Gary JW, Ghiasi Shirazi SMA, Hanson G, Heilman J, Jandir P, Kennedy E, Lacroix F, Long OR, Olmedo Negrete M, Paneva MI, Shrinivas A, Si W, Wang L, Wei H, Wimpenny S, Yates BR, Branson JG, Cittolin S, Derdzinski M, Gerosa R, Hashemi B, Holzner A, Klein D, Kole G, Krutelyov V, Letts J, Macneill I, Masciovecchio M, Olivito D, Padhi S, Pieri M, Sani M, Sharma V, Simon S, Tadel M, Vartak A, Wasserbaech S, Wood J, Würthwein F, Yagil A, Zevi Della Porta G, Amin N, Bhandari R, Bradmiller-Feld J, Campagnari C, Dishaw A, Dutta V, Franco Sevilla M, George C, Golf F, Gouskos L, Gran J, Heller R, Incandela J, Mullin SD, Ovcharova A, Qu H, Richman J, Stuart D, Suarez I, Yoo J, Anderson D, Bendavid J, Bornheim A, Lawhorn JM, Newman HB, Nguyen T, Pena C, Spiropulu M, Vlimant JR, Xie S, Zhang Z, Zhu RY, Andrews MB, Ferguson T, Mudholkar T, Paulini M, Russ J, Sun M, Vogel H, Vorobiev I, Weinberg M, Cumalat JP, Ford WT, Jensen F, Johnson A, Krohn M, Leontsinis S, Mulholland T, Stenson K, Wagner SR, Alexander J, Chaves J, Chu J, Dittmer S, Mcdermott K, Mirman N, Patterson JR, Rinkevicius A, Ryd A, Skinnari L, Soffi L, Tan SM, Tao Z, Thom J, Tucker J, Wittich P, Zientek M, Abdullin S, Albrow M, Apollinari G, Apresyan A, Apyan A, Banerjee S, Bauerdick LAT, Beretvas A, Berryhill J, Bhat PC, Bolla G, Burkett K, Butler JN, Canepa A, Cerati GB, Cheung HWK, Chlebana F, Cremonesi M, Duarte J, Elvira VD, Freeman J, Gecse Z, Gottschalk E, Gray L, Green D, Grünendahl S, Gutsche O, Harris RM, Hasegawa S, Hirschauer J, Hu Z, Jayatilaka B, Jindariani S, Johnson M, Joshi U, Klima B, Kreis B, Lammel S, Lincoln D, Lipton R, Liu M, Liu T, Lopes De Sá R, Lykken J, Maeshima K, Magini N, Marraffino JM, Maruyama S, Mason D, McBride P, Merkel P, Mrenna S, Nahn S, O'Dell V, Pedro K, Prokofyev O, Rakness G, Ristori L, Schneider B, Sexton-Kennedy E, Soha A, Spalding WJ, Spiegel L, Stoynev S, Strait J, Strobbe N, Taylor L, Tkaczyk S, Tran NV, Uplegger L, Vaandering EW, Vernieri C, Verzocchi M, Vidal R, Wang M, Weber HA, Whitbeck A, Acosta D, Avery P, Bortignon P, Bourilkov D, Brinkerhoff A, Carnes A, Carver M, Curry D, Field RD, Furic IK, Konigsberg J, Korytov A, Kotov K, Ma P, Matchev K, Mei H, Mitselmakher G, Rank D, Sperka D, Terentyev N, Thomas L, Wang J, Wang S, Yelton J, Joshi YR, Linn S, Markowitz P, Rodriguez JL, Ackert A, Adams T, Askew A, Hagopian S, Hagopian V, Johnson KF, Kolberg T, Martinez G, Perry T, Prosper H, Saha A, Santra A, Yohay R, Baarmand MM, Bhopatkar V, Colafranceschi S, Hohlmann M, Noonan D, Roy T, Yumiceva F, Adams MR, Apanasevich L, Berry D, Betts RR, Cavanaugh R, Chen X, Evdokimov O, Gerber CE, Hangal DA, Hofman DJ, Jung K, Kamin J, Sandoval Gonzalez ID, Tonjes MB, Trauger H, Varelas N, Wang H, Wu Z, Zhang J, Bilki B, Clarida W, Dilsiz K, Durgut S, Gandrajula RP, Haytmyradov M, Khristenko V, Merlo JP, Mermerkaya H, Mestvirishvili A, Moeller A, Nachtman J, Ogul H, Onel Y, Ozok F, Penzo A, Snyder C, Tiras E, Wetzel J, Yi K, Blumenfeld B, Cocoros A, Eminizer N, Fehling D, Feng L, Gritsan AV, Maksimovic P, Roskes J, Sarica U, Swartz M, Xiao M, You C, Al-Bataineh A, Baringer P, Bean A, Boren S, Bowen J, Castle J, Khalil S, Kropivnitskaya A, Majumder D, Mcbrayer W, Murray M, Royon C, Sanders S, Schmitz E, Stringer R, Tapia Takaki JD, Wang Q, Ivanov A, Kaadze K, Maravin Y, Mohammadi A, Saini LK, Skhirtladze N, Toda S, Rebassoo F, Wright D, Anelli C, Baden A, Baron O, Belloni A, Calvert B, Eno SC, Ferraioli C, Hadley NJ, Jabeen S, Jeng GY, Kellogg RG, Kunkle J, Mignerey AC, Ricci-Tam F, Shin YH, Skuja A, Tonwar SC, Abercrombie D, Allen B, Azzolini V, Barbieri R, Baty A, Bi R, Brandt S, Busza W, Cali IA, D'Alfonso M, Demiragli Z, Gomez Ceballos G, Goncharov M, Hsu D, Iiyama Y, Innocenti GM, Klute M, Kovalskyi D, Lai YS, Lee YJ, Levin A, Luckey PD, Maier B, Marini AC, Mcginn C, Mironov C, Narayanan S, Niu X, Paus C, Roland C, Roland G, Salfeld-Nebgen J, Stephans GSF, Tatar K, Velicanu D, Wang J, Wang TW, Wyslouch B, Benvenuti AC, Chatterjee RM, Evans A, Hansen P, Kalafut S, Kubota Y, Lesko Z, Mans J, Nourbakhsh S, Ruckstuhl N, Rusack R, Turkewitz J, Acosta JG, Oliveros S, Avdeeva E, Bloom K, Claes DR, Fangmeier C, Gonzalez Suarez R, Kamalieddin R, Kravchenko I, Monroy J, Siado JE, Snow GR, Stieger B, Alyari M, Dolen J, Godshalk A, Harrington C, Iashvili I, Nguyen D, Parker A, Rappoccio S, Roozbahani B, Alverson G, Barberis E, Hortiangtham A, Massironi A, Morse DM, Nash D, Orimoto T, Teixeira De Lima R, Trocino D, Wood D, Bhattacharya S, Charaf O, Hahn KA, Mucia N, Odell N, Pollack B, Schmitt MH, Sung K, Trovato M, Velasco M, Dev N, Hildreth M, Hurtado Anampa K, Jessop C, Karmgard DJ, Kellams N, Lannon K, Loukas N, Marinelli N, Meng F, Mueller C, Musienko Y, Planer M, Reinsvold A, Ruchti R, Smith G, Taroni S, Wayne M, Wolf M, Woodard A, Alimena J, Antonelli L, Bylsma B, Durkin LS, Flowers S, Francis B, Hart A, Hill C, Ji W, Liu B, Luo W, Puigh D, Winer BL, Wulsin HW, Benaglia A, Cooperstein S, Driga O, Elmer P, Hardenbrook J, Hebda P, Higginbotham S, Lange D, Luo J, Marlow D, Mei K, Ojalvo I, Olsen J, Palmer C, Piroué P, Stickland D, Tully C, Malik S, Norberg S, Barker A, Barnes VE, Das S, Folgueras S, Gutay L, Jha MK, Jones M, Jung AW, Khatiwada A, Miller DH, Neumeister N, Peng CC, Schulte JF, Sun J, Wang F, Xie W, Cheng T, Parashar N, Stupak J, Adair A, Akgun B, Chen Z, Ecklund KM, Geurts FJM, Guilbaud M, Li W, Michlin B, Northup M, Padley BP, Roberts J, Rorie J, Tu Z, Zabel J, Bodek A, de Barbaro P, Demina R, Duh YT, Ferbel T, Galanti M, Garcia-Bellido A, Han J, Hindrichs O, Khukhunaishvili A, Lo KH, Tan P, Verzetti M, Ciesielski R, Goulianos K, Mesropian C, Agapitos A, Chou JP, Christos M, Feigelis K, Gershtein Y, Gómez Espinosa TA, Halkiadakis E, Heindl M, Hughes E, Kaplan S, Kunnawalkam Elayavalli R, Kyriacou S, Lath A, Montalvo R, Nash K, Osherson M, Saka H, Salur S, Schnetzer S, Sheffield D, Somalwar S, Stone R, Thomas S, Thomassen P, Walker M, Zhou B, Delannoy AG, Foerster M, Heideman J, Riley G, Rose K, Spanier S, Thapa K, Bouhali O, Castaneda Hernandez A, Celik A, Dalchenko M, De Mattia M, Delgado A, Dildick S, Eusebi R, Gilmore J, Huang T, Kamon T, Mueller R, Pakhotin Y, Patel R, Perloff A, Perniè L, Rathjens D, Safonov A, Tatarinov A, Ulmer KA, Akchurin N, Damgov J, De Guio F, Dudero PR, Faulkner J, Gurpinar E, Kunori S, Lamichhane K, Lee SW, Libeiro T, Peltola T, Undleeb S, Volobouev I, Wang Z, Greene S, Gurrola A, Janjam R, Johns W, Maguire C, Melo A, Ni H, Sheldon P, Tuo S, Velkovska J, Xu Q, Arenton MW, Barria P, Cox B, Hirosky R, Ledovskoy A, Li H, Neu C, Sinthuprasith T, Sun X, Wang Y, Wolfe E, Xia F, Harr R, Karchin PE, Sturdy J, Zaleski S, Brodski M, Buchanan J, Caillol C, Dasu S, Dodd L, Duric S, Gomber B, Grothe M, Herndon M, Hervé A, Hussain U, Klabbers P, Lanaro A, Levine A, Long K, Loveless R, Pierro GA, Polese G, Ruggles T, Savin A, Smith N, Smith WH, Taylor D, Woods N. Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at sqrt[s]=13 TeV. PHYSICAL REVIEW LETTERS 2017; 119:221802. [PMID: 29286783 DOI: 10.1103/physrevlett.119.221802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Indexed: 06/07/2023]
Abstract
A search for a signal consistent with the type-III seesaw mechanism in events with three or more electrons or muons is presented. The data sample consists of proton-proton collisions at sqrt[s]=13 TeV collected by the CMS experiment at the LHC in 2016 and corresponds to an integrated luminosity of 35.9 fb^{-1}. Selection criteria based on the number of leptons and the invariant mass of oppositely charged lepton pairs are used to distinguish the signal from the standard model background. The observations are consistent with the expectations from standard model processes. The results are used to place limits on the production of heavy fermions of the type-III seesaw model as a function of the branching ratio to each lepton flavor. In the scenario of equal branching fractions to each lepton flavor, heavy fermions with masses below 840 GeV are excluded. This is the most sensitive probe to date of the type-III seesaw mechanism.
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Feng L, Huang C, Shanbhogue K, Sodickson DK, Chandarana H, Otazo R. RACER-GRASP: Respiratory-weighted, aortic contrast enhancement-guided and coil-unstreaking golden-angle radial sparse MRI. Magn Reson Med 2017; 80:77-89. [PMID: 29193260 DOI: 10.1002/mrm.27002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/18/2017] [Accepted: 10/19/2017] [Indexed: 12/25/2022]
Abstract
PURPOSE To develop and evaluate a novel dynamic contrast-enhanced imaging technique called RACER-GRASP (Respiratory-weighted, Aortic Contrast Enhancement-guided and coil-unstReaking Golden-angle RAdial Sparse Parallel) MRI that extends GRASP to include automatic contrast bolus timing, respiratory motion compensation, and coil-weighted unstreaking for improved imaging performance in liver MRI. METHODS In RACER-GRASP, aortic contrast enhancement (ACE) guided k-space sorting and respiratory-weighted sparse reconstruction are performed using aortic contrast enhancement and respiratory motion signals extracted directly from the acquired data. Coil unstreaking aims to weight multicoil k-space according to streaking artifact level calculated for each individual coil during image reconstruction, so that coil elements containing a high level of streaking artifacts contribute less to the final results. Self-calibrating GRAPPA operator gridding was applied as a pre-reconstruction step to reduce computational burden in the subsequent iterative reconstruction. The RACER-GRASP technique was compared with standard GRASP reconstruction in a group of healthy volunteers and patients referred for clinical liver MR examination. RESULTS Compared with standard GRASP, RACER-GRASP significantly improved overall image quality (average score: 3.25 versus 3.85) and hepatic vessel sharpness/clarity (average score: 3.58 versus 4.0), and reduced residual streaking artifact level (average score: 3.23 versus 3.94) in different contrast phases. RACER-GRASP also enabled automatic timing of the arterial phases. CONCLUSIONS The aortic contrast enhancement-guided sorting, respiratory motion suppression and coil unstreaking introduced by RACER-GRASP improve upon the imaging performance of standard GRASP for free-breathing dynamic contrast-enhanced MRI of the liver. Magn Reson Med 80:77-89, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
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Benkert T, Tian Y, Huang C, DiBella EVR, Chandarana H, Feng L. Optimization and validation of accelerated golden-angle radial sparse MRI reconstruction with self-calibrating GRAPPA operator gridding. Magn Reson Med 2017; 80:286-293. [PMID: 29193380 DOI: 10.1002/mrm.27030] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 11/02/2017] [Accepted: 11/10/2017] [Indexed: 12/24/2022]
Abstract
PURPOSE Golden-angle radial sparse parallel (GRASP) MRI reconstruction requires gridding and regridding to transform data between radial and Cartesian k-space. These operations are repeatedly performed in each iteration, which makes the reconstruction computationally demanding. This work aimed to accelerate GRASP reconstruction using self-calibrating GRAPPA operator gridding (GROG) and to validate its performance in clinical imaging. METHODS GROG is an alternative gridding approach based on parallel imaging, in which k-space data acquired on a non-Cartesian grid are shifted onto a Cartesian k-space grid using information from multicoil arrays. For iterative non-Cartesian image reconstruction, GROG is performed only once as a preprocessing step. Therefore, the subsequent iterative reconstruction can be performed directly in Cartesian space, which significantly reduces computational burden. Here, a framework combining GROG with GRASP (GROG-GRASP) is first optimized and then compared with standard GRASP reconstruction in 22 prostate patients. RESULTS GROG-GRASP achieved approximately 4.2-fold reduction in reconstruction time compared with GRASP (∼333 min versus ∼78 min) while maintaining image quality (structural similarity index ≈ 0.97 and root mean square error ≈ 0.007). Visual image quality assessment by two experienced radiologists did not show significant differences between the two reconstruction schemes. With a graphics processing unit implementation, image reconstruction time can be further reduced to approximately 14 min. CONCLUSION The GRASP reconstruction can be substantially accelerated using GROG. This framework is promising toward broader clinical application of GRASP and other iterative non-Cartesian reconstruction methods. Magn Reson Med 80:286-293, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
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Chen J, Lu M, Ma T, Cao L, Zhu X, Zhang X, Shi D, Shi H, Liu J, Feng L. Detection and complete genome characteristics of Posavirus 1 from pigs in China. Virus Genes 2017; 54:145-148. [PMID: 29181630 DOI: 10.1007/s11262-017-1512-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 10/05/2017] [Indexed: 11/26/2022]
Abstract
Porcine stool-associated RNA virus 1 (Posavirus 1) is a novel member of picornaviruses and first identified from fecal samples of 30-day-old pigs with diarrhea in USA in 2011. To evaluate the existence of Posavirus 1 in swine herds, 118 clinical samples from diarrheal pigs and 31 fecal swabs from healthy pigs were collected and detected by reverse transcription-polymerase chain reaction (RT-PCR) using Posavirus 1-specific primers. Only five fecal samples from diarrheal pigs on two swine farms were positive for Posavirus 1. The complete genome sequences [excluding poly (A) tail] of two representative isolates SDQD-25 and HBTS-11 are determined and consist of 9840 and 9819 nucleotides in length, and encode one putative polyprotein of 3070 and 2952 amino acids, respectively. They share 90.3% homology with each other and 81.3-95.4% homologies with American Posavirus 1 isolates or strains at the nucleotide sequence level. The phylogenetic analysis based on the entire genomes of reference picornavirus strains or isolates showed SDQD-25, HBTS-11 cluster together with American Posavirus 1 isolates or strains, yet are clearly distant from the other picornaviruses. The complete genome sequences of Chinese Posavirus 1 isolates will enrich the information of Posavirus 1 sequence database and further expedite posavirus research on the genetic diversity, epidemiology, and evolution in China.
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Feng L, Motelow JE, Ma C, Biche W, McCafferty C, Smith N, Liu M, Zhan Q, Jia R, Xiao B, Duque A, Blumenfeld H. Seizures and Sleep in the Thalamus: Focal Limbic Seizures Show Divergent Activity Patterns in Different Thalamic Nuclei. J Neurosci 2017; 37:11441-11454. [PMID: 29066556 PMCID: PMC5700426 DOI: 10.1523/jneurosci.1011-17.2017] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 10/09/2017] [Accepted: 10/14/2017] [Indexed: 01/12/2023] Open
Abstract
The thalamus plays diverse roles in cortical-subcortical brain activity patterns. Recent work suggests that focal temporal lobe seizures depress subcortical arousal systems and convert cortical activity into a pattern resembling slow-wave sleep. The potential simultaneous and paradoxical role of the thalamus in both limbic seizure propagation, and in sleep-like cortical rhythms has not been investigated. We recorded neuronal activity from the central lateral (CL), anterior (ANT), and ventral posteromedial (VPM) nuclei of the thalamus in an established female rat model of focal limbic seizures. We found that population firing of neurons in CL decreased during seizures while the cortex exhibited slow waves. In contrast, ANT showed a trend toward increased neuronal firing compatible with polyspike seizure discharges seen in the hippocampus. Meanwhile, VPM exhibited a remarkable increase in sleep spindles during focal seizures. Single-unit juxtacellular recordings from CL demonstrated reduced overall firing rates, but a switch in firing pattern from single spikes to burst firing during seizures. These findings suggest that different thalamic nuclei play very different roles in focal limbic seizures. While limbic nuclei, such as ANT, appear to participate directly in seizure propagation, arousal nuclei, such as CL, may contribute to depressed cortical function, whereas sleep spindles in relay nuclei, such as VPM, may interrupt thalamocortical information flow. These combined effects could be critical for controlling both seizure severity and impairment of consciousness. Further understanding of differential effects of seizures on different thalamocortical networks may lead to improved treatments directly targeting these modes of impaired function.SIGNIFICANCE STATEMENT Temporal lobe epilepsy has a major negative impact on quality of life. Previous work suggests that the thalamus plays a critical role in thalamocortical network modulation and subcortical arousal maintenance, but its precise seizure-associated functions are not known. We recorded neuronal activity in three different thalamic regions and found divergent activity patterns, which may respectively participate in seizure propagation, impaired level of conscious arousal, and altered relay of information to the cortex during focal limbic seizures. These very different activity patterns within the thalamus may help explain why focal temporal lobe seizures often disrupt widespread network function, and can help guide future treatments aimed at restoring normal thalamocortical network activity and cognition.
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Jing Z, Zhang X, Shi H, Chen J, Shi D, Dong H, Feng L. A G3P[13] porcine group A rotavirus emerging in China is a reassortant and a natural recombinant in the VP4 gene. Transbound Emerg Dis 2017; 65:e317-e328. [PMID: 29148270 PMCID: PMC7169750 DOI: 10.1111/tbed.12756] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Indexed: 12/22/2022]
Abstract
Group A rotaviruses (RVAs) are a major cause of serious intestinal disease in piglets. In this study, a novel pig strain was identified in a stool sample from China. The strain was designated RVA/Pig/China/LNCY/2016/G3P[13] and had a G3-P[13]-I5-R1-C1-M1-A8-N1-T1-E1-H1 genome. The viral protein 7 (VP7) and non-structural protein 4 (NSP4) genes of RVA/Pig/China/LNCY/2016/G3P[13] were closely related to cogent genes of human RVAs, suggesting that a reassortment between pig and human strains had occurred. Recombination analysis showed that RVA/Pig/China/LNCY/2016/G3P[13] is a natural recombinant strain between the P[23] and P[7] RVA strains, and crossover points for recombination were found at nucleotides (nt) 456 and 804 of the VP4 gene. Elucidating the biological characteristics of porcine rotavirus (PoRV) will be helpful for further analyses of the epidemic characteristics of this virus. The results of this study provide valuable information for RVA recombination and evolution and will facilitate future investigations into the molecular pathogenesis of RVAs.
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