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Kole T, Nichols R, Lei S, Wu B, Huh S, Morris C, Lee S, Mendenhall N, Dritschilo A, Collins S. A Dosimetric Comparison of Hypofractionated Passively-Scattered Proton Radiation Therapy and Stereotactic Body Radiation Therapy (SBRT) in the Definitive Treatment of Localized Prostate Cancer. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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102
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Wu B, Pang D, Gatti J, Lei S, Colin S, McNutt T, Kole T, Collins S, Dritschilo A. SU-E-T-670: Using Overlap Volume Histogram Analysis of a Prior Plan Dataset to Generate Clinically Acceptable Plans for CyberKnife Robotic Radiosurgery Treatment of Localized Prostate Cancer. Med Phys 2013. [DOI: 10.1118/1.4815097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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103
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Liu J, Hou J, Xia ZY, Zeng W, Wang X, Li R, Ke C, Xu J, Lei S, Xia Z. Recombinant PTD-Cu/Zn SOD attenuates hypoxia-reoxygenation injury in cardiomyocytes. Free Radic Res 2013; 47:386-93. [PMID: 23445361 DOI: 10.3109/10715762.2013.780286] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Oxidative stress plays a pivotal role in myocardial ischemia-reperfusion injury. Increasing the protein expression of intracellular Cu/Zn SOD, which is the major endogenous antioxidant enzyme, may attenuate or prevent hypoxia-reoxygenation injury (HRI) in cultured cardiomyocytes. However, ectogenic Cu/Zn-SOD can hardly be transferred into cells to exert biological effects. In this study, we constructed PTD-Cu/Zn SOD plasmid with a kind of translocation structure-Protein transduction domain (PTD) and detected its transmembrane ability and antioxidant effects in H9c2 rat cardiomyocytes subjected to hypoxia/reoxygenation injury (HRI). METHODS We constructed the pET-PTD-Cu/Zn SOD (CDs) prokaryotic expression vectors in plasmid that were inserted into E. coli BL21 to induce the protein expression of PTD-Cu/Zn SOD. H9c2 cardiomyocyte HRI was achieved by exposing cardiomyocytes to 12 h hypoxia followed by 2 h reoxygenation. Protein expression of PTD-Cu/Zn SOD in cardiomyocytes was assayed by Western blot and their enzyme activities were investigated by immunohistochemistry and flow cytometry. RESULTS In cultured cardiomyocytes hypoxia-reoxygenation injury model, exogenous PTD-Cu/Zn SOD could penetrate cell membrane to clear superoxide anion and decrease hydrogen peroxide level in H9c2 cardiomyocytes subjected to HRI. The level of mitochondrial membrane potential was restored to normal, and the cell apoptosis was reduced in cardiomyocytes with PTD-Cu/Zn SOD treatment during HRI. CONCLUSION Recombinant PTD-Cu/Zn SOD could scavenge intracellular-free superoxide anion, protect mitochondria from damages, and attenuate the hypoxia-reoxygenation injury in cultured cardiomyocytes.
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Zheng J, Zhang P, Li X, Lei S, Li W, He X, Zhang J, Wang N, Qi C, Chen X, Lu H, Liu Y. Post-stroke estradiol treatment enhances neurogenesis in the subventricular zone of rats after permanent focal cerebral ischemia. Neuroscience 2013; 231:82-90. [DOI: 10.1016/j.neuroscience.2012.11.042] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 11/21/2012] [Accepted: 11/22/2012] [Indexed: 10/27/2022]
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105
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Ju A, Suy S, Lei S, Oermann E, Sherer B, Hanscom H, Kim J, Lynch J, Dritschilo A, Collins S. A Dosimetric and Clinical Evaluation of Monotherapy With Hypofractionated Stereotactic Body Radiation Therapy in the Treatment of Intermediate-Risk Prostate Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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106
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Nakata B, Appert H, Lei S, Yamashita Y, Chung Y, Sowa M, Myles J, Mao C, Howard J. Immunohistochemical study on cathepsin-B and cathepsin-d in pancreatic-cancer. Oncol Rep 2012; 1:543-6. [PMID: 21607400 DOI: 10.3892/or.1.3.543] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Lysosomal enzymes, cathepsin B and D, have been studied in their possible relationship to the ability of malignant cells to invade and metastasize. In the current investigation, these cathepsins were detected immunohistochemically using avidin-biotin-peroxidase complex method in the pancreatic cancer cells of 21 patients. The positive rate of identification of cathepsin B and D was 43% and 81%, respectively. Cathepsin D stained more strongly than cathepsin B and the plasma membrane stained quite strongly in two instances. A correlation between the presence of cathepsin B or D in cancer cells and the degree of metastasis to lymph nodes, liver, or lung was not recognized.
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107
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Wang H, Liu J, Fang P, Lei S, Li X, Hou Y, Zhang S. Big endothelin-1 as a predictor of atrial fibrillation recurrence after primary ablation only in patients with paroxysmal atrial fibrillation. Herz 2012; 37:919-25. [PMID: 22669310 DOI: 10.1007/s00059-012-3626-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2011] [Accepted: 04/15/2012] [Indexed: 11/30/2022]
Abstract
BACKGROUND Atrial fibrillation (AF) recurrence after ablation is difficult to predict. The development of AF is associated with inflammation, and inflammatory markers such as big endothelin-1 (big ET-1) reflect inflammatory status. It is unknown, however, whether big ET-1 can be used as a predictor for AF recurrence. The aim of this study was to investigate the relationship between plasma levels of big ET-1 and AF recurrence. METHODS A total of 158 patients who had undergone primary ablation for symptomatic and/or drug-refractory AF, including 103 with paroxysmal and 55 with persistent AF, were included in this study. Left atrial diameter was measured with echocardiography and plasma big ET-1 levels with ELISA. All patients were followed up for at least 12 months and AF recurrence defined as an episode of AF lasting ≥ 30 s, with or without atrial flutter or atrial tachycardia. RESULTS The AF recurrence rate was 44.9% (71/158) during the median follow-up period of 22 (13, 40) months. Plasma levels of big ET-1 in the recurrence group were higher than those in the non-recurrence group in all patients [0.80 (0.54, 1.30) vs. 0.57 (0.48, 0.72) fmol·L(-) (1), p = 0.001], in patients with paroxysmal AF [0.81 (0.46, 1.30) vs. 0.57 (0.48, 0.70) fmol·L(-) (1), p = 0.009] as well as in patients with persistent AF [0.77 (0.57, 1.28) vs. 0.57 (0.49, 0.89) fmol·L(-) (1), p = 0.034]. Multiple logistic regression analyses showed that plasma levels of big ET-1 were associated with AF recurrence in patients with paroxysmal AF (p = 0.037). Kaplan-Meier analysis demonstrated that the sinus rhythm maintenance rate was lower in patients with higher big ET-1 levels than those with lower levels (p < 0.05). CONCLUSIONS Baseline plasma big ET-1 levels are associated with AF recurrence after primary ablation procedure in patients with paroxysmal AF, and may be used in the prediction of AF recurrence in these patients.
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108
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Lei S, Peng X, Liang Z, Li X, Wang C, Cheng B, Xiao Y, Zhou L. Self-template formation and properties study of Cr2O3nanoparticle tubes. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm13127c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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109
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Gilbey M, Casale C, Lei S, Malik S, Marina N, Cotena E, Heath D, Sufi P, Gray R, Mohamed-Ali V. Prevalence and treatment of depression are differentially associated with insulin resistance and obesity. Auton Neurosci 2011. [DOI: 10.1016/j.autneu.2011.05.114] [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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110
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Ramírez E, García-Rodríguez J, Borobia AM, Ortega JM, Lei S, Barrios-Fernández A, Sánchez M, Carcas AJ, Herrero A, Puente JM, Frías J. Use of antifungal agents in pediatric and adult high-risk areas. Eur J Clin Microbiol Infect Dis 2011; 31:337-47. [DOI: 10.1007/s10096-011-1315-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2010] [Accepted: 06/01/2011] [Indexed: 11/25/2022]
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111
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Cheng B, Tian B, Xie C, Xiao Y, Lei S. Highly sensitive humidity sensor based on amorphous Al2O3nanotubes. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02753g] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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112
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Cheng B, Zhang Z, Han Z, Xiao Y, Lei S. SrAlxOy:Eu2+, Dy3+ (x = 4) nanostructures: Structure and morphology transformations and long-lasting phosphorescence properties. CrystEngComm 2011. [DOI: 10.1039/c0ce00934b] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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113
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Gill B, Vahdat S, Suy S, Lei S, Xia Y, Banovac F, Anderson E, Collins S, Dritschilo A, Collins B. Robotic Radiosurgery for Inoperable Patients with Peripheral Stage IA Non-small Cell Lung Cancer: Local Control and Survival using 5-mm Margins. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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114
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Ying Z, Jing-yuan M, Yun Z, Lei S, Bin L. e0518 A case report of typical aneurysm exactly within DES implanted in left anterior descending coronary artery. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.518] [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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115
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Oermann E, Hanscom HS, Lei S, Suy S, Chen V, Collins BT, Dritschilo A, Lynch JH, Dawson NA, Collins SP. Hypofractionated robotic radiosurgery for the treatment of clinically localized prostate cancer: Early biochemical results and acute toxicity. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e15134] [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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116
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Cheng B, Jiao J, Sun W, Tian B, Xiao Y, Lei S. Lattice variation and Raman spectroscopy in hierarchical heterostructures of zinc antimonate nanoislands on ZnO nanobelts. NANOTECHNOLOGY 2010; 21:025704. [PMID: 19955602 DOI: 10.1088/0957-4484/21/2/025704] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In ZnO hierarchical heterostructures of zinc antimonate nanoislands on ZnO nanobelts, the substitution of Sb(5+) for Zn(2+) induces lattice contraction and a variation in vacancy defects, and moreover the preferential accumulation and segregation of Sb in [001] planes results in the intense perturbation of atomic motion in the a-b plane. Under nonresonant conditions, nonpolar E(2)(high) and polar quasi-longitudinal optic (LO) modes decrease in frequency due to finite-size and phonon confinement effects. Under resonant conditions, localized excitons can ionize to free carriers and form plasmons at higher excitation power density, resulting in the transformation of scattering coupling from localized exciton-LO-phonon to LO-phonon-plasmon. The intensity ratio of 2LO/1LO decreases and multiphonon scattering shows a decrease in frequency with unequal neighboring interval, and moreover the scattering coupling between the continuum of electron-hole plasmon and the discrete LO phonons causes an asymmetric lineshape.
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Cheng B, Zhang Z, Liu H, Han Z, Xiao Y, Lei S. Power- and energy-dependent photoluminescence of Eu3+ incorporated and segregated ZnO polycrystalline nanobelts synthesized by a facile combustion method followed by heat treatment. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00804d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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118
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Lei S, Harter W, Collins S, Xia F, Pang D, Gagnon G. SU-FF-T-111: Head-And-Neck IMRT Without Beam-Splitting. Med Phys 2009. [DOI: 10.1118/1.3181585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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119
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Cheng B, Liu H, Fang M, Xiao Y, Lei S, Zhang L. Long-persistent phosphorescent SrAl2O4:Eu2+, Dy3+nanotubes. Chem Commun (Camb) 2009:944-6. [DOI: 10.1039/b818057a] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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120
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Lei S, Jia L, Lou Y. Study on compound herbal medicine LC07 treating chemotherapy-induced peripheral neuropathy. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.20735] [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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121
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Fang Z, Tang K, Shen J, Lei S, Liu X, Yang Q. Growth of tin dioxide nanobelts via Au-catalytic VLS process. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2007; 7:4567-4570. [PMID: 18283845 DOI: 10.1166/jnn.2007.908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Ultra-long (several millimeters) tin dioxide SnO2 nanobelts were prepared by chemical vapor deposition at 850 degrees C. The X-ray powder diffraction (XRD) indicated that the as-prepared sample is tetragonal phase SnO2; field emission scanning electron microscopy (FESEM) reveals the as-prepared SnO2 is uniform nanobelts; transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) studies show the nanobelts is monocrystalline with width of hundreds of nanometers and growth along [101] crystal direction; X-ray energy-dispersive spectrometer (EDS) and photoluminescence (PL) spectrum were used to detail its composition and optical properties. The possible formation mechanism of these ultra-long nanobelts was also proposed on the basis of experiments.
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Jie G, Zhixiang S, Lei S, Hesheng L, Xiaojun T. Relationship between expression and methylation status of p16INK4a and the proliferative activity of different areas' tumour cells in human colorectal cancer. Int J Clin Pract 2007; 61:1523-9. [PMID: 17537196 DOI: 10.1111/j.1742-1241.2006.01033.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The p16(INK4a) gene is a cell cycle inhibitor and a major tumour suppressor protein, but the regulation and effects on tumour cells' invasion process of p16(INK4a) is poorly known. A role for p16(INK4a) in basal cell carcinoma is suggested by the observation that p16(INK4a) was upregulated at the invasive front of the majority of basal cell carcinomas with infiltrative growth patterns, accompanied by cessation of proliferation. In this paper, we explore whether there is a difference of tumour cells' proliferative activity between the centre and the invasion front tissues of human colorectal cancer and its relationship with the expression and methylation status of p16(INK4a) gene. We obtained the centre and the invasion front tissues of colorectal cancer respectively by the technology of laser mircodissection. The expressions of the proliferating cell nuclear antigen ki67 and p16(INK4a) were assessed by immunohistochemistry, methylation-specific polymerase chain reaction (MS-PCR) and reverse-transcription polymerase chain reaction (RT-PCR) in the different areas. There was a significant difference in the expressions of ki67 between the centre and the invasion front tissues (p < 0.05). The difference did not correlate with age, sex, Dukes stage but did correlate with expression of p16(INK4a) gene (chi(2) = 25.37, p < 0.01). Furthermore, hypermethylation of the promoter was the major mechanism of inactivation of p16(INK4a) in the centre areas. Demethylation of the p16(INK4a) promoter, the elevated expression of p16(INK4a) protein and mRNA level was proved in the invasion front. Our finding suggested that enhanced invasion in tumours was accompanied by ceased proliferation in the invasion fronts of human colorectal cancer. This interesting phenomenon may be due to not only the microenvironment, but also the molecular changes such as p16(INK4a) status.
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Lei S, Tang K, Qi Y, Fang Z, Zheng H. A Self-Sacrificing Template Route to Spinel MIIIn2S4 (MII = Mn, Zn, Cd, Fe, Co, Ni) and MIIn5S8 (MI = Cu, Ag) Porous Microspheres. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200501112] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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124
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Lei S. 327. J Minim Invasive Gynecol 2005. [DOI: 10.1016/j.jmig.2005.07.327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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125
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Lei S, Tang K, Fang Z, Huang Y, Zheng H. Synthesis of MnWO(4) nanofibres by a surfactant-assisted complexation-precipitation approach and control of morphology. NANOTECHNOLOGY 2005; 16:2407-2411. [PMID: 20818026 DOI: 10.1088/0957-4484/16/10/069] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Single-crystal MnWO(4) nanofibres with diameters as small as 3-4 nm and length up to 800-1000 nm have been successfully synthesized by a novel surfactant-assisted complexation-precipitation method. X-ray powder diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and electron diffraction (ED) were employed to study the crystal structure and morphologies of the products. Experiments show that the complexation and the surfactant are the crucial factors affecting the morphology of the products. The possible formation process and growth mechanism have been proposed.
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