201
|
Graessler J, Qin Y, Zhong H, Zhang J, Licinio J, Wong ML, Xu A, Chavakis T, Bornstein AB, Ehrhart-Bornstein M, Lamounier-Zepter V, Lohmann T, Wolf T, Bornstein SR. Metagenomic sequencing of the human gut microbiome before and after bariatric surgery in obese patients with type 2 diabetes: correlation with inflammatory and metabolic parameters. THE PHARMACOGENOMICS JOURNAL 2012; 13:514-22. [PMID: 23032991 DOI: 10.1038/tpj.2012.43] [Citation(s) in RCA: 292] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 08/15/2012] [Accepted: 08/20/2012] [Indexed: 12/18/2022]
Abstract
Roux-en-Y gastric bypass (RYGB) has become a prominent therapeutic option for long-term treatment of morbid obesity and type 2 diabetes mellitus (T2D). Cross talk and pathogenetic consequences of RYGB-induced profound effects on metabolism and gut microbiome are poorly understood. The aim of the present study therefore was to characterize intra-individual changes of gut microbial composition before and 3 months after RYGB by metagenomic sequencing in morbidly obese patients (body mass index (BMI)>40 kg m(-)(2)) with T2D. Subsequently, metagenomic data were correlated with clinical indices. Based on gene relative abundance profile, 1061 species, 729 genera, 44 phyla and 5127 KO (KEGG Orthology) were identified. Despite high diversity, bacteria could mostly be assigned to seven bacterial divisions. The overall metagenomic RYGB-induced shift was characterized by a reduction of Firmicutes and Bacteroidetes and an increase of Proteobacteria. Twenty-two microbial species and 11 genera were significantly altered by RYGB. Using principal component analysis, highly correlated species were assembled into two common components. Component 1 consisted of species that were mainly associated with BMI and C-reactive protein. This component was characterized by increased numbers of Proteobacterium Enterobacter cancerogenus and decreased Firmicutes Faecalibacterium prausnitzii and Coprococcus comes. Functional analysis of carbohydrate metabolism by KO revealed significant effects in 13 KOs assigned to phosphotransferase system. Spearmen's Rank correlation indicated an association of 10 species with plasma total- or low-density lipoprotein cholesterol, and 5 species with triglycerides. F. prausnitzii was directly correlated to fasting blood glucose. This is the first clinical demonstration of a profound and specific intra-individual modification of gut microbial composition by full metagenomic sequencing. A clear correlation exists of microbiome composition and gene function with an improvement in metabolic and inflammatory parameters. This will allow to develop new diagnostic and therapeutic strategies based on metagenomic sequencing of the human gut microbiome.
Collapse
|
202
|
Sun G, Shan MH, Ma BL, Geng ZL, Alibiyati A, Zhong H, Wang J, Ren GH, Li HT, Dong C. Identifying crosstalk of mTOR signaling pathway of lobular breast carcinomas. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2012; 16:1355-1361. [PMID: 23104651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND Invasive lobular carcinoma (ILC) and its variants represent 5% to 15% of all invasive breast cancers diagnoses annually. AS a serine/threonine kinase, mammalian target of rapamycin (mTOR) is often a downstream effector of PI3K/Akt (phosphatidyl inositol 3-kinase/protein kinase B) signaling pathway in breasts and many types of cancer cells. Therefore, agents that target mTOR in direct or indirect manner are being developed in anti-cancer therapy. AIM In this study, our objective here was to explore more crosstalk pathway with mTOR signaling pathway. MATERIALS AND METHODS We collected pathways data from published database, then based on bioinformatics methods we analyzed the significant pathways in the database, additionally, the crosstalk pathways were also analyzed which were defined as those pathways which have the overlapping genes with each other. RESULTS As we expected, the results showed that Notch signaling pathway (hsa04330), Regulation of autophagy (hsa04140), and Adipocytokine signaling pathway (hsa04920) were linked to mTOR signaling pathway. All of them have been demonstrated participate in breast cancer progression. CONCLUSIONS We obtained some key pathways that crosstalked with mTOR signaling pathway, we hope our study could provide novel therapeutic approaches for breast cancer.
Collapse
|
203
|
Ma WY, Zhuang L, Cai DX, Zhong H, Zhao C, Sun Q. Inverse Correlation between Caveolin-1 Expression and Clinical Severity in Psoriasis Vulgaris. J Int Med Res 2012. [PMID: 23206456 DOI: 10.1177/030006051204000513] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Objective: This study investigated the clinical significance of expression of caveolin-1 - a plasma membrane protein involved in caveola formation, endocytosis, signal transduction and angiogenesis - inthe pathogenesis of psoriasis vulgaris. Methods: A total of 20 patients with psoriasis vulgaris and 20 healthy volunteers were recruited. The expressions of caveolin-1, Ki-67 (marker of cell proliferation) and CD34 (marker of angiogenesis) in skin biopsies were detected by immunohistochemistry, and the level of caveolin-1 protein was quantified by Western blotting. Clinical severity was assessed using the Psoriasis Area and Severity Index (PASI) score. Correlations between caveolin-1 expression and psoriasis severity, cell proliferation and angiogenesis were analysed using the Spearman rank correlation test. Results: Expression of caveolin-1 was significantly lower in psoriasis samples than in healthy skin samples. In psoriasis lesions, the level of caveolin-1 expression was inversely correlated with the severity of psoriasis, cell proliferation and angiogenesis. Conclusions: The level of caveolin-1 expression seems to be related to the clinical severity of psoriasis, and may play a role in the abnormal keratinocyte hyperplasia and angiogenesis seen in this condition.
Collapse
|
204
|
Li W, Xu K, Zhong H, Ni Y, Bi Y. A New Unibody Branched Stent-graft for Reconstruction of the Canine Aortic Arch. Eur J Vasc Endovasc Surg 2012; 44:139-44. [PMID: 22659046 DOI: 10.1016/j.ejvs.2012.05.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Accepted: 05/07/2012] [Indexed: 11/17/2022]
|
205
|
Stanley N, Zhong H, Glide-Hurst C, Chetty I, Movsas B. MO-F-BRA-06: Systematic Evaluation of a Deformable Image Registration Algorithm from a Commercial Software Package. Med Phys 2012. [DOI: 10.1118/1.4735825] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
206
|
Sabbah DA, Brattain MG, Zhong H. Dual inhibitors of PI3K/mTOR or mTOR-selective inhibitors: which way shall we go? Curr Med Chem 2012; 18:5528-44. [PMID: 22172063 DOI: 10.2174/092986711798347298] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 10/18/2011] [Accepted: 10/19/2011] [Indexed: 11/22/2022]
Abstract
The phosphatidylinositol-3-kinase (PI3K)/AKT/mTOR signaling pathway is a central regulator in cell proliferation, growth, and angiogenesis. Inhibition of this pathway therefore is a major strategy for cancer chemotherapy. In order to induce the maximal therapeutic outcome in cancer treatment, vertical inhibition of the PI3K/AKT/mTOR pathway or horizontal inhibition of PI3K/AKT/mTOR and other kinases has been reported. In this review, we discuss the drug design and clinical development of dual inhibitors of PI3K and mTOR as well as the mTOR-selective inhibitors, classified based on the mechanism of action and the chemical structures. Structural determinants for increasing selectivity toward PI3Kα or mTOR are revealed from the structure-activity relationship of the reported inhibitors. Current clinical development in combination therapy of inhibitors involving in the PI3K/AKT/mTOR pathway is also discussed.
Collapse
|
207
|
Li S, Lu M, Kim J, Glide-Hurst C, Chetty I, Zhong H. MO-F-BRA-04: Voxel-Based Statistical Analysis of Deformable Image Registration Error via a Finite Element Method. Med Phys 2012; 39:3875. [PMID: 28518241 DOI: 10.1118/1.4735823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Purpose Clinical implementation of adaptive treatment planning is limited by the lack of quantitative tools to assess deformable image registration errors (R-ERR). The purpose of this study was to develop a method, using finite element modeling (FEM), to estimate registration errors based on mechanical changes resulting from them. Methods An experimental platform to quantify the correlation between registration errors and their mechanical consequences was developed as follows: diaphragm deformation was simulated on the CT images in patients with lung cancer using a finite element method (FEM). The simulated displacement vector fields (F-DVF) were used to warp each CT image to generate a FEM image. B-Spline based (Elastix) registrations were performed from reference to FEM images to generate a registration DVF (R-DVF). The F- DVF was subtracted from R-DVF. The magnitude of the difference vector was defined as the registration error, which is a consequence of mechanically unbalanced energy (UE), computed using 'in-house-developed' FEM software. A nonlinear regression model was used based on imaging voxel data and the analysis considered clustered voxel data within images. Results A regression model analysis showed that UE was significantly correlated with registration error, DVF and the product of registration error and DVF respectively with R̂2=0.73 (R=0.854). The association was verified independently using 40 tracked landmarks. A linear function between the means of UE values and R- DVF*R-ERR has been established. The mean registration error (N=8) was 0.9 mm. 85.4% of voxels fit this model within one standard deviation. Conclusions An encouraging relationship between UE and registration error has been found. These experimental results suggest the feasibility of UE as a valuable tool for evaluating registration errors, thus supporting 4D and adaptive radiotherapy. The research was supported by NIH/NCI R01CA140341.
Collapse
|
208
|
Zhong H, Glide-Hurst C, Li H, Nurushev T, Movsas B, Chetty I. WE-E-BRB-03: Development of a Deformable Dosimetric Phantom for Verification of 4D Dose Calculation Algorithms. Med Phys 2012; 39:3956. [DOI: 10.1118/1.4736145] [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
|
209
|
Kim J, Zhong H. TH-A-211-02: Effects of Different Parameters on Deformable Image Registration. Med Phys 2012. [DOI: 10.1118/1.4736234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
210
|
Li HS, Chin K, Nurushev T, Kim J, Zhong H, Ryu S, Ajlouni M, Movsas B, Chetty IJ. TU-C-213CD-09: Dosimetric Impact of the Interplay Effect on RapidArc versus IMRT Delivery of Lung Cancer Treatment Using SBRT. Med Phys 2012. [DOI: 10.1118/1.4735936] [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
|
211
|
Glide-Hurst C, Zhong H, Altman M, Chen D, Chetty I. WE-C-BRB-01: Dosimetric Changes Realized from Extended Bit-Depth and Metal Artifact Reduction in CT. Med Phys 2012. [DOI: 10.1118/1.4736094] [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
|
212
|
Wu D, Wang H, Li Z, Wang L, Zheng F, Jiang J, Gao Y, Zhong H, Huang Y, Suo Z. Cathepsin B may be a potential biomarker in cervical cancer. Histol Histopathol 2012; 27:79-87. [PMID: 22127599 DOI: 10.14670/hh-27.79] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cathepsin B is a protease which is able to digest extracellular matrix. It is currently unknown whether cathepsin B plays a role in cervical cancer development and progression. With Q-PCR and Western blotting, we observed cathepsin B expression in cervical cancer cell line Hela cells. After the gene was silenced in HeLa cells with SiRNA, we confirmed that cathepsin B expressions at both mRNA and protein levels were significantly reduced. At the same time, cell proliferation, migration and invasion of the HeLa cells were significantly decreased compared to control cells. In addition, a significant regression of tumor growth in nude mice which received the siRNA targeted cathepsin B HeLa cells was observed. We further studied the expression of cathepsin B in a series of 169 clinical samples, including 56 invasive cervical squamous carcinoma, 85 CINs and 28 normal cervical tissues. It was found that cathepsin B expression in invasive carcinomas was significantly higher than that in the CINs and normal tissues (P<0.01). In addition, cathepsin B expression in the invasive carcinomas was positively correlated to tumor invasion depth and lymphatic metastasis. Our results indicate that cathepsin B may be a potential biomarker for further strategical clinical studies in cervical cancer.
Collapse
|
213
|
Song YZ, Xu JM, Lv JS, Zhong H, Ye Y, Xie JM. Electrochemical reduction of tartrazine at multi-walled carbon nanotube-modified pyrolytic graphite electrode. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2012. [DOI: 10.1134/s0036024412020306] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
214
|
Mørk A, Pehrson A, Brennum LT, Nielsen SM, Zhong H, Lassen AB, Miller S, Westrich L, Boyle NJ, Sánchez C, Fischer CW, Liebenberg N, Wegener G, Bundgaard C, Hogg S, Bang-Andersen B, Stensbøl TB. Pharmacological effects of Lu AA21004: a novel multimodal compound for the treatment of major depressive disorder. J Pharmacol Exp Ther 2011; 340:666-75. [PMID: 22171087 DOI: 10.1124/jpet.111.189068] [Citation(s) in RCA: 206] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
1-[2-(2,4-Dimethylphenyl-sulfanyl)-phenyl]-piperazine (Lu AA21004) is a human (h) serotonin (5-HT)(3A) receptor antagonist (K(i) = 3.7 nM), h5-HT(7) receptor antagonist (K(i) = 19 nM), h5-HT(1B) receptor partial agonist (K(i) = 33 nM), h5-HT(1A) receptor agonist (K(i) = 15 nM), and a human 5-HT transporter (SERT) inhibitor (K(i) = 1.6 nM) (J Med Chem 54:3206-3221, 2011). Here, we confirm that Lu AA21004 is a partial h5-HT(1B) receptor agonist [EC(50) = 460 nM, intrinsic activity = 22%] using a whole-cell cAMP-based assay and demonstrate that Lu AA21004 is a rat (r) 5-HT(7) receptor antagonist (K(i) = 200 nM and IC(50) = 2080 nM). In vivo, Lu AA21004 occupies the r5-HT(1B) receptor and rSERT (ED(50) = 3.2 and 0.4 mg/kg, respectively) after subcutaneous administration and is a 5-HT(3) receptor antagonist in the Bezold-Jarisch reflex assay (ED(50) = 0.11 mg/kg s.c.). In rat microdialysis experiments, Lu AA21004 (2.5-10.0 mg/kg s.c.) increased extracellular 5-HT, dopamine, and noradrenaline in the medial prefrontal cortex and ventral hippocampus. Lu AA21004 (5 mg/kg per day for 3 days; minipump subcutaneously), corresponding to 41% rSERT occupancy, significantly increased extracellular 5-HT in the ventral hippocampus. Furthermore, the 5-HT(3) receptor antagonist, ondansetron, potentiated the increase in extracellular levels of 5-HT induced by citalopram. Lu AA21004 has antidepressant- and anxiolytic-like effects in the rat forced swim (Flinders Sensitive Line) and social interaction and conditioned fear tests (minimal effective doses: 7.8, 2.0, and 3.9 mg/kg). In conclusion, Lu AA21004 mediates its pharmacological effects via two pharmacological modalities: SERT inhibition and 5-HT receptor modulation. In vivo, this results in enhanced release of several neurotransmitters and antidepressant- and anxiolytic-like profiles at doses for which targets in addition to the SERT are occupied. The multimodal activity profile of Lu AA21004 is distinct from that of current antidepressants.
Collapse
|
215
|
Xu J, Zhong H, Yang Y. Human parechovirus infection in central nervous system related diseases and sepsis in children in Shanghai, China. BMC Proc 2011. [PMCID: PMC3239780 DOI: 10.1186/1753-6561-5-s6-p47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
216
|
Xiao HB, Zhou WY, Chen XF, Mei J, Lv ZW, Ding FB, Li GQ, Zhong H, Bao CR. Interferon-β efficiently inhibited endothelial progenitor cell-induced tumor angiogenesis. Gene Ther 2011; 19:1030-4. [DOI: 10.1038/gt.2011.171] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
217
|
Chetty I, Li H, Kumar S, Siddiqui M, Liu D, Wen W, Fraser C, Zhong H, Movsas B, Ajlouni M. Correlation of Dose with Patterns of Failure following SABR-based Treatment of NSCLC. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
218
|
Wen N, Glide-Hurst C, Chetty I, Nurushev T, Zhong H, Kim J. SU-E-T-780: Evaluation of Margin-Reduction Using a Framework for Image-Guided Adaptive Radiotherapy (IGART) of Prostate Cancer in the Clinical Setting. Med Phys 2011. [DOI: 10.1118/1.3612744] [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
|
219
|
Li H, Zhong H, Kim J, Nurushev T, Glide-Hurst C, Gulam M, Chetty IJ. SU-E-T-873: Dosimetric Difference Between Direct Dose Mapping and Energy/Mass Transfer Mapping for 4D Dose Accumulation. Med Phys 2011. [DOI: 10.1118/1.3612837] [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
|
220
|
Zhong H, Stanley N, Chetty I. SU-D-BRB-05: A Framework for 4D and Adaptive Planning Workflow Incorporating Monte Carlo-Based Optimization and Dose Calculation. Med Phys 2011. [DOI: 10.1118/1.3611523] [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
|
221
|
Li H, Zhong H, Kim J, Nurushev T, Chetty I. SU-E-T-874: Investigation of the Interplay Effect Between MLC and Lung Tumor Motions Using 4DCT and RPM Profile Data. Med Phys 2011. [DOI: 10.1118/1.3612838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
222
|
Zhong H, Li H, Glide-Hurst C, Wen N, Siebers J, Nurushev T, Chetty I. SU-E-T-689: Monte Carlo-Based Optimization for Lung SBRT Treatment Planning. Med Phys 2011. [DOI: 10.1118/1.3612651] [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
|
223
|
Zhong H, Hribar LJ, Daniels JC, Feken MA, Brock C, Trager MD. Aerial ultra-low-volume application of naled: impact on nontarget imperiled butterfly larvae (Cyclargus thomasi bethunebakeri) and efficacy against adult mosquitoes (Aedes taeniorhynchus). ENVIRONMENTAL ENTOMOLOGY 2010; 39:1961-1972. [PMID: 22182563 DOI: 10.1603/en10089] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We assessed the exposure and acute toxicity of naled, applied aerially as an ultra-low-volume spray for mosquito control, on late instar larvae of the Miami blue (Cyclargus thomasi bethunebakeri) (Comstock and Huntington 1943) (Lepidoptera: Lycaenidae), an imperiled South Florida butterfly. We concurrently evaluated the control efficacy against caged adult female salt-marsh mosquitoes (Aedes taeniorhynchus) (Wiedemann 1821) (Diptera: Culicidae). This 3-yr study was conducted in north Key Largo (Monroe County, FL) beginning in 2006. The field trials incorporated 15 sampling stations: nine in the target spray zone, three in the spray drift zone at varying distances from the target zone, and three in the control zone not subjected to naled spray drift. A total of six field spray trials were completed, three at an altitude of 30.5 m (100 feet), and three at 45.7 m (150 feet). For all trials, the ultra-low-volume application of Trumpet EC insecticide (78% naled) at a rate of 54.8 ml/ha (0.75 fl. oz/acre) was effective in killing caged adult mosquitoes in the target zone. Butterfly larvae survival was significantly reduced in the spray zone compared with drift and control zones. Analysis of insecticide residue data revealed that the mortality of the late instar butterfly larvae was a result of exposure to excess residues of naled. Additional research is needed to determine mitigation strategies that can limit exposure of sensitive butterflies to naled while maintaining mosquito control efficacy.
Collapse
|
224
|
|
225
|
Wen N, Nurushev T, Kim J, Liu D, Zhong H, Ren L, Patel S, Elshaikh M, Movsas B, Chetty I. A Framework for Evaluation of Adaptive vs. Conventional Planning in IGRT of Prostate Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1673] [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]
|
226
|
Zhong H, Kim J, Glide-Hurst C, Chetty I. SU-GG-J-53: A Novel Dose Reconstruction Method for Four-Dimensional Treatment Planning. Med Phys 2010. [DOI: 10.1118/1.3468277] [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
|
227
|
Kim J, Ren L, Jin J, Zhong H, Chetty IJ. SU-DD-A4-03: Cone Beam Computed Tomography Reconstruction on Graphics Processing Units: Flat3D Texture Techniques. Med Phys 2010. [DOI: 10.1118/1.3468001] [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
|
228
|
Glide-Hurst C, Zhong H, Kim J, Chetty I. SU-GG-J-50: The Role of 4DCT Sorting in Treatment Planning for Image-Guided Radiation Therapy. Med Phys 2010. [DOI: 10.1118/1.3468274] [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
|
229
|
Yan C, Zhong H, Murphy M, Weiss E, Siebers JV. A pseudoinverse deformation vector field generator and its applications. Med Phys 2010; 37:1117-28. [PMID: 20384247 PMCID: PMC2837727 DOI: 10.1118/1.3301594] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To present, implement, and test a self-consistent pseudoinverse displacement vector field (PIDVF) generator, which preserves the location of information mapped back-and-forth between image sets. METHODS The algorithm is an iterative scheme based on nearest neighbor interpolation and a subsequent iterative search. Performance of the algorithm is benchmarked using a lung 4DCT data set with six CT images from different breathing phases and eight CT images for a single prostrate patient acquired on different days. A diffeomorphic deformable image registration is used to validate our PIDVFs. Additionally, the PIDVF is used to measure the self-consistency of two nondiffeomorphic algorithms which do not use a self-consistency constraint: The ITK Demons algorithm for the lung patient images and an in-house B-Spline algorithm for the prostate patient images. Both Demons and B-Spline have been QAed through contour comparison. Self-consistency is determined by using a DIR to generate a displacement vector field (DVF) between reference image R and study image S (DVF(R-S)). The same DIR is used to generate DVF(S-R). Additionally, our PIDVF generator is used to create PIDVF(S-R). Back-and-forth mapping of a set of points (used as surrogates of contours) using DVF(R-S) and DVF(S-R) is compared to back-and-forth mapping performed with DVF(R-S) and PIDVF(S-R). The Euclidean distances between the original unmapped points and the mapped points are used as a self-consistency measure. RESULTS Test results demonstrate that the consistency error observed in back-and-forth mappings can be reduced two to nine times in point mapping and 1.5 to three times in dose mapping when the PIDVF is used in place of the B-Spline algorithm. These self-consistency improvements are not affected by the exchanging of R and S. It is also demonstrated that differences between DVF(S-R) and PIDVF(S-R) can be used as a criteria to check the quality of the DVF. CONCLUSIONS Use of DVF and its PIDVF will improve the self-consistency of points, contour, and dose mappings in image guided adaptive therapy.
Collapse
|
230
|
Zhong H, Harrison MC, Warren WH. Metric vs. Ordinal place structure in active navigation. J Vis 2010. [DOI: 10.1167/7.9.760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
231
|
Zhong H, Harrison MC, Warren WH. The role of topological boundary relations in active navigation. J Vis 2010. [DOI: 10.1167/6.6.144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
232
|
Zhong H, Braunstein ML. Effect of background motion on perceived object shape. J Vis 2010. [DOI: 10.1167/3.9.858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
233
|
Zhong H, Harrison MC, Warren WH. The roles of spatial knowledge and visual landmarks in navigation. J Vis 2010. [DOI: 10.1167/5.8.303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
234
|
Braunstein ML, Bocheva NB, Zhong H, Sauer CW. Judging depth, slant, and curvature in structure-from-motion. J Vis 2010. [DOI: 10.1167/1.3.326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
235
|
Zhong H, Cornilleau-Peres V, Cheong LF, Yeow M, Droulez J. Tilt perception from optic flow in two-view stimuli. J Vis 2010. [DOI: 10.1167/1.3.315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
236
|
Tillakaratne NJK, Guu JJ, de Leon RD, Bigbee AJ, London NJ, Zhong H, Ziegler MD, Joynes RL, Roy RR, Edgerton VR. Functional recovery of stepping in rats after a complete neonatal spinal cord transection is not due to regrowth across the lesion site. Neuroscience 2010; 166:23-33. [PMID: 20006680 PMCID: PMC2820384 DOI: 10.1016/j.neuroscience.2009.12.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Accepted: 12/03/2009] [Indexed: 01/15/2023]
Abstract
Rats receiving a complete spinal cord transection (ST) at a neonatal stage spontaneously can recover significant stepping ability, whereas minimal recovery is attained in rats transected as adults. In addition, neonatally spinal cord transected rats trained to step more readily improve their locomotor ability. We hypothesized that recovery of stepping in rats receiving a complete spinal cord transection at postnatal day 5 (P5) is attributable to changes in the lumbosacral neural circuitry and not to regeneration of axons across the lesion. As expected, stepping performance measured by several kinematics parameters was significantly better in ST (at P5) trained (treadmill stepping for 8 weeks) than age-matched non-trained spinal rats. Anterograde tracing with biotinylated dextran amine showed an absence of labeling of corticospinal or rubrospinal tract axons below the transection. Retrograde tracing with Fast Blue from the spinal cord below the transection showed no labeled neurons in the somatosensory motor cortex of the hindlimb area, red nucleus, spinal vestibular nucleus, and medullary reticular nucleus. Retrograde labeling transsynaptically via injection of pseudorabies virus (Bartha) into the soleus and tibialis anterior muscles showed no labeling in the same brain nuclei. Furthermore, re-transection of the spinal cord at or rostral to the original transection did not affect stepping ability. Combined, these results clearly indicate that there was no regeneration across the lesion after a complete spinal cord transection in neonatal rats and suggest that this is an important model to understand the higher level of locomotor recovery in rats attributable to lumbosacral mechanisms after receiving a complete ST at a neonatal compared to an adult stage.
Collapse
|
237
|
Zhong H, Jiang MY, Su XH, Kuang HM. Synthesis, crystal structure, and luminescence properties of a novel europium(III) complex. RUSS J COORD CHEM+ 2010. [DOI: 10.1134/s1070328410020107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
238
|
Zhong H, Duan SH, Hong YP, Li ML, Liu YQ, Luo CJ, Luo QY, Xiao SZ, Xie HL, Xu YP, Yang XM, Zeng XR, Zhong QY. Retraction of articles by H. Zhong et al. Acta Crystallogr Sect E Struct Rep Online 2009; 66:e11-2. [PMID: 21579903 PMCID: PMC2980006 DOI: 10.1107/s1600536809049964] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 12/15/2009] [Indexed: 11/27/2022]
Abstract
Retraction of 41 articles by H. Zhong et al.. A series of 41 papers by H. Zhong et al. are retracted.
Collapse
|
239
|
Wang BS, Zhong H. Dichlorido(2,9-dimethyl-1,10-phenanthroline-κN,N')copper(II). Acta Crystallogr Sect E Struct Rep Online 2009; 65:m1156. [PMID: 21577696 PMCID: PMC2970365 DOI: 10.1107/s1600536809034187] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Accepted: 08/26/2009] [Indexed: 12/01/2022]
Abstract
In the title compound, [CuCl2(C14H12N2)], the complex molecule has m symmetry, with the mirror plane oriented parallel to the planar molecule and the ligated CuII atom. The metal centre has a distorted tetrahedral coordination formed by two N atoms from one 2,9-dimethyl-1,10-phenanthroline ligand and two Cl atoms. There is intermolecular π–π stacking between adjacent 2,9-dimethyl-1,10-phenanthroline ligands, with a centroid–centroid distance of 3.733 (2)Å.
Collapse
|
240
|
Hua X, Zhu LP, Li R, Zhong H, Xue YF, Chen ZH. Effects of Diagnostic Contrast-Enhanced Ultrasound on Permeability of Placental Barrier: A Primary Study. Placenta 2009; 30:780-4. [DOI: 10.1016/j.placenta.2009.06.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Revised: 06/24/2009] [Accepted: 06/25/2009] [Indexed: 11/16/2022]
|
241
|
Zhong H, Fragoso M, Patel S, Ajlouni M, Movsas B, Chetty I. WE-C-BRC-08: A Method to Evaluate Region-Specific Pulmonary Function Using 4D CT Images for Lung Cancer Patients Undergoing Radiation Therapy. Med Phys 2009. [DOI: 10.1118/1.3182476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
242
|
Zhong H, Fragoso M, Chetty I. SU-FF-J-36: Efficient 4D Treatment Planning Using CT Datasets Synthesized Via Deformable Image Registration. Med Phys 2009. [DOI: 10.1118/1.3181328] [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
|
243
|
Zhong H, Xie HL, Duan SH, Li M. Synthesis, crystal structure, and catalytic properties of a one-dimensional nickel(II) polymer. RUSS J COORD CHEM+ 2009. [DOI: 10.1134/s1070328409050091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
244
|
Zhong H, Xie HL, Duan SH. Synthesis, crystal structure, and luminescence properties of a one-dimensional europium(III) polymer. RUSS J COORD CHEM+ 2009. [DOI: 10.1134/s1070328409010072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
245
|
Cao H, Zhong H, Zhao W, Li J, Peng L. B- and T-cell Epitope of the Envelope Glycoprotein E of Dengue Virus Defined by Bioinformatics, ELISA and Enzyme-linked Immunospot. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
246
|
Zhong H, Zeng XR, Yang XM, Luo QY. Bis(4-phenylpyridinium) tetrakis(nitrato-κ 2O, O′)stannate(IV). Retraction. Acta Crystallogr Sect E Struct Rep Online 2008; 64:e28. [PMID: 21580805 PMCID: PMC2959645 DOI: 10.1107/s1600536808031255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Accepted: 09/26/2008] [Indexed: 11/11/2022]
Abstract
Retraction of Acta Cryst. (2007), E63, m1567. The paper by Zhong, Zeng, Yang & Luo [Acta Cryst. (2007), E63, m1567] is retracted.
Collapse
|
247
|
Zhong H, Zeng XR, Yang XM, Luo QY. Bis(4,4'-bipyridine-κN)tetra-kis(nitrato-κO,O')tin(IV). Retraction. Acta Crystallogr Sect E Struct Rep Online 2008; 64:e29. [PMID: 21580806 PMCID: PMC2959706 DOI: 10.1107/s1600536808031267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Accepted: 09/26/2008] [Indexed: 11/11/2022]
Abstract
Retraction of Acta Cryst. (2007), E63, m1566. The paper by Zhong, Zeng, Yang & Luo [Acta Cryst. (2007), E63, m1566] is retracted.
Collapse
|
248
|
Ying Z, Roy RR, Zhong H, Zdunowski S, Edgerton VR, Gomez-Pinilla F. BDNF-exercise interactions in the recovery of symmetrical stepping after a cervical hemisection in rats. Neuroscience 2008; 155:1070-8. [PMID: 18672032 DOI: 10.1016/j.neuroscience.2008.06.057] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2008] [Revised: 06/07/2008] [Accepted: 06/28/2008] [Indexed: 10/21/2022]
Abstract
Clinical evidence indicates that motor training facilitates functional recovery after a spinal cord injury (SCI). Brain-derived neurotrophic factor (BDNF) is a powerful synaptic facilitator and likely plays a key role in motor and sensory functions. Spinal cord hemisection decreases the levels of BDNF below the injury site, and exercise can counteract this decrease [Ying Z, Roy RR, Edgerton VR, Gomez-Pinilla F (2005) Exercise restores levels of neurotrophins and synaptic plasticity following spinal cord injury. Exp Neurol 193:411-419]. It is not clear, however, whether the exercise-induced increases in BDNF play a role in mediating the recovery of locomotion after a SCI. We performed a lateral cervical ( approximately C4) hemisection in adult rats. Seven days after hemisection, the BDNF inhibitor trkB IgG was injected into the cervical spinal cord below the lesion ( approximately C5-C6). Half of the rats were exposed to voluntary running wheels for 14 days. Locomotor ability was assessed by determining the symmetry between the contralateral (unaffected) vs. the ipsilateral (affected) forelimb at the most optimum treadmill speed for each rat. Sedentary and exercised rats with BDNF inhibition showed a higher level of asymmetry during the treadmill locomotion test than rats not treated with the BDNF inhibitor. In hemisected rats, exercise normalized the levels of molecules important for synaptic function, such as cyclic AMP response element binding protein (CREB) and synapsin I, in the ipsilateral cervical enlargement, whereas the BDNF blocker lessened these exercise-associated effects. The results indicate that BDNF levels play an important role in shaping the synaptic plasticity and in defining the level of recovery of locomotor performance after a SCI.
Collapse
|
249
|
Zhong H, Siebers J. SU-GG-T-57: Investigation of Dose Interpolation Errors with a 4D Monte Carlo Method. Med Phys 2008. [DOI: 10.1118/1.2961807] [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
|
250
|
Zhong H, Weiss E, Rosu M, Keall P, Williamson J, Siebers J. MO-E-AUD B-06: A 4D Monte Carlo Dose Calculation Method for Clinical Applications. Med Phys 2008. [DOI: 10.1118/1.2962388] [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
|