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Lou SF, Zheng X, Chen Y, Qiu XY. Crystal structures of two new dinuclear Ag(I) complexes constructed from 4,4′-biphenyldicarboxylic acid and N-containing ligands. J STRUCT CHEM+ 2012. [DOI: 10.1134/s0022476611060084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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377
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Valev VK, Clercq BD, Zheng X, Denkova D, Osley EJ, Vandendriessche S, Silhanek AV, Volskiy V, Warburton PA, Vandenbosch GAE, Ameloot M, Moshchalkov VV, Verbiest T. The role of chiral local field enhancements below the resolution limit of Second Harmonic Generation microscopy. OPTICS EXPRESS 2012; 20:256-264. [PMID: 22274348 DOI: 10.1364/oe.20.000256] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
While it has been demonstrated that, above its resolution limit, Second Harmonic Generation (SHG) microscopy can map chiral local field enhancements, below that limit, structural defects were found to play a major role. Here we show that, even below the resolution limit, the contributions from chiral local field enhancements to the SHG signal can dominate over those by structural defects. We report highly homogeneous SHG micrographs of star-shaped gold nanostructures, where the SHG circular dichroism effect is clearly visible from virtually every single nanostructure. Most likely, size and geometry determine the dominant contributions to the SHG signal in nanostructured systems.
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378
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Ye M, Yu H, Yu W, Zhang G, Xiao L, Zheng X, Wu J. Evaluation of the significance of circulating insulin-like growth factor-1 and C-reactive protein in patients with chronic obstructive pulmonary disease. J Int Med Res 2012; 40:1025-35. [PMID: 22906275 DOI: 10.1177/147323001204000321] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES This study in patients with chronic obstructive pulmonary disease (COPD) investigated whether acute exacerbation of COPD (AECOPD) and clinically stable COPD (CSCOPD) are associated with changes in circulating insulin-like growth factor-1 (IGF-1) and C-reactive protein (CRP) concentrations, and whether changes in IGF-1 and CRP levels are related to changes in the indicators of malnutrition and muscle wasting. METHODS A total of 61 patients with AECOPD, 43 patients with CSCOPD and 20 healthy age-matched controls were included in the study. Circulating IGF-1 and CRP levels, together with erythrocyte sedimentation rate and indicators of malnutrition and muscle wasting, were measured in all the study participants. RESULTS Circulating IGF-1 levels were significantly lower and CRP levels significantly higher in COPD patients than in controls. In addition, IGF-1 levels were significantly lower and CRP levels significantly higher in AECOPD patients than in CSCOPD patients. In COPD patients, indicators of malnutrition and muscle wasting (weight, body mass index, thigh circumference and albumin level) were significantly positively correlated with logIGF-1; thigh circumference and albumin level were significantly inversely correlated with logCRP. CONCLUSION Circulating IGF-1 and CRP levels may have potential as indicators of exacerbation, malnutrition and muscle wasting in patients with COPD.
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Chai L, Liu S, Mao Q, Wang D, Li X, Zheng X, Xia H. A novel conditionally replicating adenoviral vector with dual expression of IL-24 and arresten inserted in E1 and the region between E4 and fiber for improved melanoma therapy. Cancer Gene Ther 2011; 19:247-54. [DOI: 10.1038/cgt.2011.84] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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380
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Diao Z, Wang J, Qi H, Li X, Zheng X, Yin C. Treatment of angiostrongyliasis using a combination of albendazole and dexamethasone: the results of a retrospective and comparative study. ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY 2011; 105:65-9. [PMID: 21294950 DOI: 10.1179/136485910x12851868780342] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
As the information available on the treatment of angiostrongyliasis with a combination of albendazole and dexamethasone is limited, the efficacy of such therapy was assessed using data collected during the 2006 outbreak of angiostrongyliasis in Beijing. In a retrospective and controlled study, 35 patients treated with albendazole-dexamethasone (given 20 mg albendazole/kg and 3 mg dexamethasone daily for 7 days) were compared with 34 controls who were treated only symptomatically (with acetaminophen or other drugs). Compared with the controls, the patients given the combination were less likely to have headaches after 7 days (P = 0·038), tended to have headaches that cleared quicker (P = 0·010), and received fewer doses of acetaminophen (P = 0·036). Since no serious adverse effects were observed, a 1-week treatment with a combination of albendazole and dexamethasone appears both safe and beneficial in the treatment of angiostrongyliasis.
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Hickey MJ, Malone CK, Erickson KL, Gerschenson LE, Lin AH, Inagaki A, Hiraoka K, Kasahara N, Mueller B, Kruse CA, Kong S, Tyler B, Zhou J, Carter BS, Brem H, Junghans RP, Sampath P, Lai RK, Recht LD, Reardon DA, Paleologos N, Groves M, Rosenfeld MR, Davis T, Green J, Heimberger A, Sampson J, Hashimoto N, Tsuboi A, Chiba Y, Kijima N, Oka Y, Kinoshita M, Kagawa N, Fujimoto Y, Sugiyama H, Yoshimine T, Birks SM, Burnet M, Pilkington GJ, Yu JS, Wheeler CJ, Rudnick J, Mazer M, Wang HQ, Nuno MA, Richardson JE, Fan X, Ji J, Chu RM, Bender JG, Hawkins EW, Black KL, Phuphanich S, Pollack IF, Jakacki RI, Butterfield LH, Okada H, Hunt MA, Pluhar GE, Andersen BM, Gallardo JL, Seiler CO, SantaCruz KS, Ohlfest JR, Bauer DF, Lamb LS, Harmon DK, Zheng X, Romeo AK, Gillespie GY, Parker JN, Markert JM, Jacobs VL, Landry RP, De Leo JA, Bromberg JE, Doorduijn J, Baars JW, van Imhoff GW, Enting R, van den Bent MJ, Murphy KA, Bedi J, Epstein A, Ohlfest JR, Olin M, Andersen B, Swier L, Ohlfest J, Litterman AJ, Zellmer DM, Ohlfest JR, Chiocca EA, Aguilar LK, Aguilar-Cordova E, Manzanera AG, Harney KR, Portnow J, Badie B, Lesniak M, Bell S, Ray-Chaudhuri A, Kaur B, Hardcastle J, Cavaliere R, McGregor J, Lo S, Chakarvarti A, Grecula J, Newton H, Trask TW, Baskin DS, New PZ, Zeng J, See AP, Phallen J, Belcaid Z, Durham N, Meyer C, Albesiano E, Pradilla G, Ford E, Hammers H, Tyler B, Brem H, Tran PT, Pardoll D, Drake CG, Lim M, Ghazi A, Ashoori A, Hanley P, Salsman V, Schaffer DR, Grada Z, Kew Y, Powell SZ, Grossman R, Scheurer ME, Leen AM, Rooney CM, Bollard CM, Heslop HE, Gottschalk S, Ahmed N, Hu J, Patil C, Nuno M, Wheeler C, Rudnick J, Phuphanich S, Mazer M, Wang HQ, Chu R, Black K, Yu J, Marabelle A, Kohrt H, Brody J, Luong R, Tse V, Levy R, Li YM, Jun H, Shahryar M, Daniel VA, Walter HA, Thaipisuttikul I, Avila E, Mitchell DA, Archer GE, Friedman HS, Herndon JE, Bigner DD, Sampson JH, Johnson LA, Archer GE, Nair SK, Schmittling R, Reap E, Sampson JH, Mitchell DA, Li YM, Shahryar M, Jun H, Daniel VA, Walter HA, Knisely JP, Kluger H, Flanigan J, Sznol M, Yu JB, Chiang VL, Prins RM, Kim W, Soto H, Lisiero DN, Lisiero DN, Liau LM. IMMUNOTHERAPY. Neuro Oncol 2011; 13:iii34-iii40. [PMCID: PMC3199174 DOI: 10.1093/neuonc/nor151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023] Open
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382
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Zheng X, Wang Y, Ren W, Luo R, Zhang S, Zhang JH, Zeng Q. Risk of metabolic syndrome in adults exposed to the great Chinese famine during the fetal life and early childhood. Eur J Clin Nutr 2011; 66:231-6. [DOI: 10.1038/ejcn.2011.161] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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383
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Liu C, Li G, Zheng X, Meng H, Qiu L, Lou J. Experimental study on culture modelling and phenotypes analysis of human bone marrow-derived mesenchymal stem cells in vitro. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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384
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Zheng X, Huang Y, Wang Z, Yan H, Pan S, Wang H. Presumed cytomegalovirus-associated retrobulbar optic neuritis in a patient after allogeneic stem cell transplantation. Transpl Infect Dis 2011; 14:177-9. [PMID: 22093546 DOI: 10.1111/j.1399-3062.2011.00678.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 06/03/2011] [Accepted: 07/25/2011] [Indexed: 11/28/2022]
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385
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Alikani M, Tomkin G, Goodall NN, Zheng X, Cohen J, Munne S. Asynchronous division in human embryos is associated with complex chromosome abnormalities but this association is absent in euploid embryos and those with single or double chromosome gain or loss. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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386
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Jiang N, Zhang X, Zheng X, Chen D, Zhang Y, Siu LKS, Xin HB, Li R, Zhao H, Riordan N, Ichim TE, Quan D, Jevnikar AM, Chen G, Min W. Targeted gene silencing of TLR4 using liposomal nanoparticles for preventing liver ischemia reperfusion injury. Am J Transplant 2011; 11:1835-44. [PMID: 21794086 DOI: 10.1111/j.1600-6143.2011.03660.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
RNAi-based therapy is a promising strategy for the prevention of ischemia-reperfusion injury (IRI). However, systemic administration of small interfering RNA (siRNA) may cause globally nonspecific targeting of all tissues, which impedes clinical use. Here we report a hepatocyte-specific delivery system for the treatment of liver IRI, using galactose-conjugated liposome nanoparticles (Gal-LipoNP). Heptocyte-specific targeting was validated by selective in vivo delivery as observed by increased Gal-LipoNP accumulation and gene silencing in the liver. Gal-LipoNP TLR4 siRNA treatment resulted in a significant decrease of serum alanine transferase (ALT) and aspartate transaminase (AST) in a hepatic IRI model. Histopathology displayed an overall reduction of the injury area in the Gal-LipoNP TLR4 siRNA treated mice. Additionally, neutrophil accumulation and lipid peroxidase-mediated tissue injury, detected by MPO, MDA and ROS respectively, were attenuated after Gal-LipoNP TLR4 siRNA treatment. Moreover, therapeutic effects of Gal-LipoNP TLR4 siRNA were associated with suppression of the inflammatory cytokines IL-1 and TNF-α. Taken together, this study is the first demonstration of liver IRI treatment using liver-specific siRNA delivery.
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387
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Zhang YW, Chen L, Bai Y, Zheng X. Long-term outcomes of late course accelerated hyper-fractionated radiotherapy for localized esophageal carcinoma in Mainland China: a meta-analysis. Dis Esophagus 2011; 24:495-501. [PMID: 21309922 DOI: 10.1111/j.1442-2050.2010.01173.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Published data on the long-term survival results of patients with localized esophageal carcinoma receiving late course accelerated hyper-fractionated radiotherapy (LCAF RT) versus conventional fractionated radiotherapy (CF RT) are inconclusive. In order to derive a more precise estimation of the both treatment-regimes, a meta-analysis based on systematic review of published articles was performed. A meta-analysis was performed using trials identified through Pubmed and Chinese national knowledge infrastructure. Results in 5-year survival and 5-year local control were collected from randomized trials comparing LCAF RT with CF RT. Review Manager (The Cochrane Collaboration, Oxford, England) and Stata software (Stata Corporation, College Station, TX, USA) were used for data management. A total of 11 trials were involved in this analysis with 572 cases and 567 controls. Our results showed that LCAF RT, compared with CF RT, significantly improved the 5-year survival (odds ratio [OR]= 2.93, 95% confidence interval [CI]: 2.15-4.00, P < 0.00001) and 5-year local control (OR = 3.96, 95% CI: 2.91-5.38, P < 0.00001). LCAF RT was more therapeutically beneficial than CF RT in the localized esophageal carcinoma.
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388
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Qian X, Allada K, Dutta C, Huang J, Katich J, Wang Y, Zhang Y, Aniol K, Annand JRM, Averett T, Benmokhtar F, Bertozzi W, Bradshaw PC, Bosted P, Camsonne A, Canan M, Cates GD, Chen C, Chen JP, Chen W, Chirapatpimol K, Chudakov E, Cisbani E, Cornejo JC, Cusanno F, Dalton MM, Deconinck W, de Jager CW, De Leo R, Deng X, Deur A, Ding H, Dolph PAM, Dutta D, El Fassi L, Frullani S, Gao H, Garibaldi F, Gaskell D, Gilad S, Gilman R, Glamazdin O, Golge S, Guo L, Hamilton D, Hansen O, Higinbotham DW, Holmstrom T, Huang M, Ibrahim HF, Iodice M, Jiang X, Jin G, Jones MK, Kelleher A, Kim W, Kolarkar A, Korsch W, LeRose JJ, Li X, Li Y, Lindgren R, Liyanage N, Long E, Lu HJ, Margaziotis DJ, Markowitz P, Marrone S, McNulty D, Meziani ZE, Michaels R, Moffit B, Camacho CM, Nanda S, Narayan A, Nelyubin V, Norum B, Oh Y, Osipenko M, Parno D, Peng JC, Phillips SK, Posik M, Puckett AJR, Qiang Y, Rakhman A, Ransome RD, Riordan S, Saha A, Sawatzky B, Schulte E, Shahinyan A, Shabestari MH, Sirca S, Stepanyan S, Subedi R, Sulkosky V, Tang LG, Tobias A, Urciuoli GM, Vilardi I, Wang K, Wojtsekhowski B, Yan X, Yao H, Ye Y, Ye Z, Yuan L, Zhan X, Zhang YW, Zhao B, Zheng X, Zhu L, Zhu X, Zong X. Single spin asymmetries in charged pion production from semi-inclusive deep inelastic scattering on a transversely polarized 3He Target at Q2 = 1.4-2.7 GeV2. PHYSICAL REVIEW LETTERS 2011; 107:072003. [PMID: 21902386 DOI: 10.1103/physrevlett.107.072003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Indexed: 05/31/2023]
Abstract
We report the first measurement of target single spin asymmetries in the semi-inclusive (3)He(e,e'π(±))X reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab using a 5.9 GeV electron beam, covers a range of 0.16 < x < 0.35 with 1.4 < Q(2) < 2.7 GeV(2). The Collins and Sivers moments were extracted from the azimuthal angular dependence of the measured asymmetries. The π(±) Collins moments for (3)He are consistent with zero, except for the π(+) moment at x = 0.35, which deviates from zero by 2.3σ. While the π(-) Sivers moments are consistent with zero, the π(+) Sivers moments favor negative values. The neutron results were extracted using the nucleon effective polarization and measured cross section ratios of proton to (3)He, and are largely consistent with the predictions of phenomenological fits and quark model calculations.
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389
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Xue Q, Zheng X, Bielamowicz S, Mittal R. Sensitivity of vocal fold vibratory modes to their three-layer structure: implications for computational modeling of phonation. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2011; 130:965-76. [PMID: 21877809 PMCID: PMC3190660 DOI: 10.1121/1.3605529] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The sensitivity of the eigenmodes and eigenfrequencies of the human vocal fold to its three-layer structure is studied using finite-element modeling. The study covers a variety of three-dimensional vocal fold models ranging from an idealized, longitudinally uniform structure to a physiologically more realistic, longitudinally varying structure. Geometric parameters including the thickness of the ligament and cover layers as well as the ligament length are varied systematically. The results indicate that vocal fold vibratory modes are quite insensitive to the longitudinal variation in the thickness of the three layers as well as the variation in ligament length. However, significant overall changes in thickness of each layer can produce noticeable changes in these modes. The implications of these findings on computational modeling of phonation are discussed.
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390
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Zheng X, Mittal R, Xue Q, Bielamowicz S. Direct-numerical simulation of the glottal jet and vocal-fold dynamics in a three-dimensional laryngeal model. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2011; 130:404-15. [PMID: 21786908 PMCID: PMC3155594 DOI: 10.1121/1.3592216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
An immersed-boundary method based flow solver coupled with a finite-element solid dynamics solver is employed in order to conduct direct-numerical simulations of phonatory dynamics in a three-dimensional model of the human larynx. The computed features of the glottal flow including mean and peak flow rates, and the open and skewness quotients are found to be within the normal physiological range. The flow-induced vibration pattern shows the classical "convergent-divergent" glottal shape, and the vibration amplitude is also found to be typical for human phonation. The vocal fold motion is analyzed through the method of empirical eigenfunctions and this analysis indicates a 1:1 modal entrainment between the "adduction-abduction" mode and the "mucosal wave" mode. The glottal jet is found to exhibit noticeable cycle-to-cycle asymmetric deflections and the mechanism underlying this phenomenon is examined.
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391
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Valev VK, Silhanek AV, Jeyaram Y, Denkova D, De Clercq B, Petkov V, Zheng X, Volskiy V, Gillijns W, Vandenbosch GAE, Aktsipetrov OA, Ameloot M, Moshchalkov VV, Verbiest T. Hotspot decorations map plasmonic patterns with the resolution of scanning probe techniques. PHYSICAL REVIEW LETTERS 2011; 106:226803. [PMID: 21702624 DOI: 10.1103/physrevlett.106.226803] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 03/23/2011] [Indexed: 05/31/2023]
Abstract
In high definition mapping of the plasmonic patterns on the surfaces of nanostructures, the diffraction limit of light remains an important obstacle. Here we demonstrate that this diffraction limit can be completely circumvented. We show that upon illuminating nanostructures made of nickel and palladium, the resulting surface-plasmon pattern is imprinted on the structures themselves; the hotspots (regions of local field enhancement) are decorated with overgrowths, allowing for their subsequent imaging with scanning-probe techniques. The resulting resolution of plasmon pattern imaging is correspondingly improved.
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392
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Mao W, Xu Y, Liu J, Ma S, Zhou X, Chen Q, Zheng X, Du X. Pattern of recurrence after curative surgery in thoracic esophageal squamous cell carcinoma: A 6-year experience with 1,020 patients. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e14557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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393
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Jiang J, Wu C, Zheng X, Zhou Q, Zhang X, Xu X, Lu B, Ju J. Prognostic values of microRNAs in phase III clinical trial gastric cancer patients treated with S-1/oxaliplatin or doxifluridine/oxaliplatin. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.4073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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394
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Meziane M, Brash EJ, Gilman R, Jones MK, Luo W, Pentchev L, Perdrisat CF, Puckett AJR, Punjabi V, Wesselmann FR, Ahmidouch A, Albayrak I, Aniol KA, Arrington J, Asaturyan A, Ates O, Baghdasaryan H, Benmokhtar F, Bertozzi W, Bimbot L, Bosted P, Boeglin W, Butuceanu C, Carter P, Chernenko S, Christy E, Commisso M, Cornejo JC, Covrig S, Danagoulian S, Daniel A, Davidenko A, Day D, Dhamija S, Dutta D, Ent R, Frullani S, Fenker H, Frlez E, Garibaldi F, Gaskell D, Gilad S, Goncharenko Y, Hafidi K, Hamilton D, Higinbotham DW, Hinton W, Horn T, Hu B, Huang J, Huber GM, Jensen E, Kang H, Keppel C, Khandaker M, King P, Kirillov D, Kohl M, Kravtsov V, Kumbartzki G, Li Y, Mamyan V, Margaziotis DJ, Markowitz P, Marsh A, Matulenko Y, Maxwell J, Mbianda G, Meekins D, Melnik Y, Miller J, Mkrtchyan A, Mkrtchyan H, Moffit B, Moreno O, Mulholland J, Narayan A, Nedev S, Piasetzky E, Pierce W, Piskunov NM, Prok Y, Ransome RD, Razin DS, Reimer PE, Reinhold J, Rondon O, Shabestari M, Shahinyan A, Shestermanov K, Širca S, Sitnik I, Smykov L, Smith G, Solovyev L, Solvignon P, Subedi R, Suleiman R, Tomasi-Gustafsson E, Vasiliev A, Vanderhaeghen M, Veilleux M, Wojtsekhowski BB, Wood S, Ye Z, Zanevsky Y, Zhang X, Zhang Y, Zheng X, Zhu L. Search for effects beyond the born approximation in polarization transfer observables in e(over→)p elastic scattering. PHYSICAL REVIEW LETTERS 2011; 106:132501. [PMID: 21520982 DOI: 10.1103/physrevlett.106.132501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Indexed: 05/30/2023]
Abstract
Intensive theoretical and experimental efforts over the past decade have aimed at explaining the discrepancy between data for the proton electric to magnetic form factor ratio, G(E)/G(M), obtained separately from cross section and polarization transfer measurements. One possible explanation for this difference is a two-photon-exchange contribution. In an effort to search for effects beyond the one-photon-exchange or Born approximation, we report measurements of polarization transfer observables in the elastic H(e[over →],e(')p[over →]) reaction for three different beam energies at a Q(2)=2.5 GeV(2), spanning a wide range of the kinematic parameter ε. The ratio R, which equals μ(p)G(E)/G(M) in the Born approximation, is found to be independent of ε at the 1.5% level. The ε dependence of the longitudinal polarization transfer component P(ℓ) shows an enhancement of (2.3±0.6)% relative to the Born approximation at large ε.
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395
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Zheng X, Mittal R, Bielamowicz S. A computational study of asymmetric glottal jet deflection during phonation. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2011; 129:2133-43. [PMID: 21476669 PMCID: PMC3104592 DOI: 10.1121/1.3544490] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Two-dimensional numerical simulations are used to explore the mechanism for asymmetric deflection of the glottal jet during phonation. The model employs the full Navier-Stokes equations for the flow but a simple laryngeal geometry and vocal-fold motion. The study focuses on the effect of Reynolds number and glottal opening angle with a particular emphasis on examining the importance of the so-called "Coanda effect" in jet deflection. The study indicates that the glottal opening angle has no substantial effect on glottal jet deflection. Deflection in the glottal jet is always preceded by large-scale asymmetry in the downstream portion of the glottal jet. A detailed analysis of the velocity and vorticity fields shows that these downstream asymmetric vortex structures induce a flow at the glottal exit which is the primary driver for glottal jet deflection.
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396
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Zhang GY, Cheng T, Luan Q, Liao T, Nie CL, Zheng X, Xie XG, Gao WY. Vitamin D: a novel therapeutic approach for keloid, an in vitro analysis. Br J Dermatol 2011; 164:729-37. [PMID: 21070203 DOI: 10.1111/j.1365-2133.2010.10130.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND Vitamin D and its metabolites play an important role in calcium homeostasis, bone remodelling, hormone secretion, cell proliferation and differentiation. Recent studies also suggest a beneficial role of vitamin D in slowing the progression of tissue fibrosis. However, their effects on dermal fibrosis and keloids are unknown. Objectives To investigate the effect of 1,25-dihydroxyvitamin D3 (1,25D) in the pathogenesis of tissue fibrosis by keloid fibroblasts (KFs). METHODS KFs were cultured and exposed to different concentrations of 1,25D in the presence or absence of transforming growth factor (TGF)-β1. KF phenotypes and protein production were analysed by real-time reverse transcriptase-polymerase chain reaction, Western blot, immunofluorescence and multiplex enzyme-linked immunosorbent assay techniques. Collagen synthesis was evaluated by measuring (3) H-proline incorporation. The effect of 1,25D on cell proliferation and viability was evaluated by Formazan assay, proliferating cell nuclear antigen expression and the colorimetric conversion of 3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide. RESULTS We confirmed the presence of vitamin D receptors (VDRs) in cultured keloid fibroblasts. Fibroblasts transfected with a vitamin D response element reporter construct and exposed to the active vitamin D metabolite 1,25D showed increased promoter activity indicating VDR functionality in these cells. Incubation of KFs with 1,25D suppressed TGF-β1-induced collagen type I, fibronectin and α-smooth muscle actin expression. 1,25D also modulated plasminogen activator inhibitor-1 and matrix metalloproteinase-9 expression induced by TGF-β1. Interestingly, 1,25D induced hepatocyte growth factor mRNA expression and protein secretion in keloid fibroblasts. CONCLUSIONS This study highlights key mechanistic pathways through which vitamin D decreases fibrosis, and provides a rationale for studies to test vitamin D supplementation as a preventive and/or early treatment strategy for keloid and related fibrotic disorders.
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397
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Xiao P, Zheng X, Imhof R, Hirata K, McAuley W, Mateus R, Hadgraft J, Lane M. Opto-Thermal Transient Emission Radiometry (OTTER) to image diffusion in nails in vivo. Int J Pharm 2011; 406:111-3. [DOI: 10.1016/j.ijpharm.2011.01.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 12/28/2010] [Accepted: 01/06/2011] [Indexed: 10/18/2022]
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398
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Lin Y, Mao Q, Zheng X, Yang K, Chen H, Zhou C, Xie L. Human papillomavirus 16 or 18 infection and prostate cancer risk: a meta-analysis. Ir J Med Sci 2011; 180:497-503. [PMID: 21400096 DOI: 10.1007/s11845-011-0692-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2010] [Accepted: 01/18/2011] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Whether the oncogenic human papillomavirus (HPV) infection, especially infection with the most common subtypes 16 or 18, is related to prostate carcinogenesis remains conflicting. A meta-analysis with updated data was performed to obtain a more precise estimate of the association between them. METHODS Eligible studies were retrieved via both computer searches and review of references. The relation of HPV-16 or HPV-18 infection to prostate cancer (PC) was quantified separately. Stratified analyses based on HPV detection methods and geographic regions were also performed. Estimates of OR with 95% CI were summarized using the fixed-effect or random-effect models as appropriate. RESULTS Twenty-five eligible studies were retrieved. All the 25 studies were assigned for exploring the relation of HPV-16 infection to PC, while 13 studies provided additional information on HPV-18 simultaneously. In the overall estimates, the pooled OR indicated no significant increase of PC risk related with either HPV-16 (OR 1.09; 95% CI 0.97-1.23; P(heterogeneity) = 0.135) or HPV-18 (OR 1.05; 95% CI 0.89-1.24; P(heterogeneity) = 0.314) infection. Further quantitative assay of stratified data could also not yield any significant result, except the stratified analysis on HPV-16 DNA detection, which revealed higher HPV-16 DNA prevalence in PC cases (OR 1.54; 95% CI 1.07-2.20; P(heterogeneity) = 0.130). CONCLUSIONS Even though the overall estimates did not provide a supportive evidence for the causal role of HPV in prostate carcinogenesis, higher HPV-16 DNA prevalence in PC cases from the stratified analysis still indicated a potential association between HPV infection and PC risk in our meta-analysis.
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399
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Chen YX, Zheng X, Wang JF, Mao L, Ding YT. Effects of orthotopic liver transplantation in inbred rats on bone biomechanical properties. Transplant Proc 2011; 42:3809-14. [PMID: 21094861 DOI: 10.1016/j.transproceed.2010.08.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 07/11/2010] [Accepted: 08/19/2010] [Indexed: 10/18/2022]
Abstract
AIM To determine the effects of orthotopic liver transplantation in inbred rats on the mechanical properties of bones at different anatomic sites. METHODS The 24 rats that survived liver transplantation were paired with sham-operated rats of similar body weight. Six months after surgery, the lumbar vertebra, the proximal femur, and the middle femoral shaft were measured for their biomechanical properties and bone mineral density. RESULTS The ultimate force, the ultimate stress, the Young modulus and the bone mineral density of both the proximal femur and the middle femur shaft of the rats were significantly reduced in the liver transplant group. However, no significant change was observed in the various parameters that indicate the biomechanical properties and the bone mineral density of the lumbar vertebra. CONCLUSIONS Orthotopic liver transplantation impairs the biomechanical properties of the proximal femur and the middle femoral shaft. Orthotopic liver transplantation itself is one of the risk factors for posttransplant fracture.
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400
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Zheng X, Zhu H, Yuan Z, Zhang L, Zhang X, Sheng X. Simultaneous Determination of Six Major Active Furocoumarins in Radix Glehniae by HPLC-DAD. J Chromatogr Sci 2011. [DOI: 10.1093/chrsci/49.3.209] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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