101
|
Li Y, Gu L, Kanade T. Robustly Aligning a Shape Model and Its Application to Car Alignment of Unknown Pose. IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE 2011; 33:1860-1876. [PMID: 21358003 DOI: 10.1109/tpami.2011.40] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Precisely localizing in an image a set of feature points that form a shape of an object, such as car or face, is called alignment. Previous shape alignment methods attempted to fit a whole shape model to the observed data, based on the assumption of Gaussian observation noise and the associated regularization process. However, such an approach, though able to deal with Gaussian noise in feature detection, turns out not to be robust or precise because it is vulnerable to gross feature detection errors or outliers resulting from partial occlusions or spurious features from the background or neighboring objects. We address this problem by adopting a randomized hypothesis-and-test approach. First, a Bayesian inference algorithm is developed to generate a shape-and-pose hypothesis of the object from a partial shape or a subset of feature points. For alignment, a large number of hypotheses are generated by randomly sampling subsets of feature points, and then evaluated to find the one that minimizes the shape prediction error. This method of randomized subset-based matching can effectively handle outliers and recover the correct object shape. We apply this approach on a challenging data set of over 5,000 different-posed car images, spanning a wide variety of car types, lighting, background scenes, and partial occlusions. Experimental results demonstrate favorable improvements over previous methods on both accuracy and robustness.
Collapse
|
102
|
Yamada Y, Ueno K, Fukumura T, Yuan HT, Shimotani H, Iwasa Y, Gu L, Tsukimoto S, Ikuhara Y, Kawasaki M. Electrically Induced Ferromagnetism at Room Temperature in Cobalt-Doped Titanium Dioxide. Science 2011; 332:1065-7. [DOI: 10.1126/science.1202152] [Citation(s) in RCA: 404] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
103
|
Strauss GM, Wang XF, Maddaus M, Johnstone D, Johnson E, Harpole D, Gillenwater HH, Gu L, Sugarbaker D, Green MR, Graziano SL, Kratzke RA, Schilsky RL, Crawford J, Vokes EE. Adjuvant chemotherapy (AC) in stage IB non-small cell lung cancer (NSCLC): Long-term follow-up of Cancer and Leukemia Group B (CALGB) 9633. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.7015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
104
|
Wang J, Zhang W, He A, Yang Y, Gu L. 193 Clinical observation of HA-G regimen chemotherapy in remission induction for elderly patients with acute leukemia and myelodysplastic syndrome. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70195-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
105
|
Caron A, Qin CL, Gu L, González S, Shluger A, Fecht HJ, Louzguine-Luzgin DV, Inoue A. Structure and nano-mechanical characteristics of surface oxide layers on a metallic glass. NANOTECHNOLOGY 2011; 22:095704. [PMID: 21270487 DOI: 10.1088/0957-4484/22/9/095704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Owing to their low elastic moduli, high specific strength and excellent processing characteristics in the undercooled liquid state, metallic glasses are promising materials for applications in micromechanical systems. With miniaturization of metallic mechanical components down to the micrometer scale, the importance of a native oxide layer on a glass surface is increasing. In this work we use TEM and XPS to characterize the structure and properties of the native oxide layer grown on Ni(62)Nb(38) metallic glass and their evolution after annealing in air. The thickness of the oxide layer almost doubled after annealing. In both cases the oxide layer is amorphous and consists predominantly of Nb oxide. We investigate the friction behavior at low loads and in ambient conditions (i.e. at T = 295 K and 60% air humidity) of both as-cast and annealed samples by friction force microscopy. After annealing the friction coefficient is found to have significantly increased. We attribute this effect to the increase of the mechanical stability of the oxide layer upon annealing.
Collapse
|
106
|
Liao Z, Gu L, Shen F, Dagvadorj A, Gupta S, Pattabiraman N, Nevalainen MT, Trabulsi EJ, Gomella LG, McCue P. Identification of a small-molecule inhibitor of Stat5a/b through structure-based screen for therapy development for prostate cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.7_suppl.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
17 Background: There are no effective treatments for metastatic or castration resistant prostate cancer. We have shown that transcription factor Stat5a/b is constitutively active in high-grade prostate cancer, but not in normal human prostate epithelium. Stat5a/b is active in 95% of clinical castration resistant prostate cancers, and the expression of active Stat5a/b in primary prostate cancer predicts early disease recurrence. Stat5a/b is critical for the viability of prostate cancer cells in vitro and for growth of prostate xenograft tumors in nude mice. Stat5a/b synergizes with androgen receptor (AR) and Stat5a/b promotes metastatic behavior of human prostate cancer cells in vitro and in vivo. Here, we hypothesize that Stat5a/b is a molecular target for rational drug design for prostate cancer. Methods: We identified a small- molecule inhibitor of Stat5a/b dimerization by structure-based virtual screen from a database of 30 million chemical structures. The efficacy of the Stat5a/b inhibitor was determined by reporter gene assays, dimerization by co-immunoprecipitations, nuclear translocation by cytochemistry and binding to DNA by EMSA. Cell viability was analyzed by MTT assay. Results: The novel Stat5a/b inhibitor IST5-002 inhibited transcriptional activity of Stat5a/b at IC50 of 1.5 μ M for Stat5a and 3.5 μ M for Stat5b, but not of Stat3 in prostate cancer cells. IST5-002 inhibited dimerization, nuclear translocation, and binding of Stat5a/b to the Stat5 DNA consensus sequence. Furthermore, IST5-002 inhibited expression of Stat5a/b target gene cyclin D1, and induced massive apoptosis of DU145, CWR22Rv1 and LNCaP human prostate cancer cells. IST5-002 blocked prostate cancer xenograft tumor growth in nude mice and induced death in clinical prostate cancers ex vivo in 3D organ cultures. Conclusions: We have identified a small molecule Stat5a/b inhibitor IST5-002 for therapy development for prostate cancer. Future work will focus on chemical modifications of IST5-002 to achieve IC50 below 1 μ M and oral administration. No significant financial relationships to disclose.
Collapse
|
107
|
Gu L, Kim Y, Liu Y, Ryou H, Wimmer C, Dai L, Arola D, Looney S, Pashley D, Tay F. Biomimetic analogs for collagen biomineralization. J Dent Res 2011; 90:82-7. [PMID: 20940362 PMCID: PMC3143382 DOI: 10.1177/0022034510385241] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 06/26/2010] [Accepted: 06/28/2010] [Indexed: 11/17/2022] Open
Abstract
Inability of chemical phosphorylation of sodium trimetaphosphate to induce intrafibrillar mineralization of type I collagen may be due to the failure to incorporate a biomimetic analog to stabilize amorphous calcium phosphates (ACP) as nanoprecursors. This study investigated adsorption/desorption characteristics of hydrolyzed and pH-adjusted sodium trimetaphosphate (HPA-Na(3)P(3)O(9)) to collagen. Based on those results, a 5-minute treatment time with 2.8 wt% HPA-Na(3)P(3)O(9) was used in a single-layer reconstituted collagen model to confirm that both the ACP-stabilization analog and matrix phosphoprotein analog must be present for intrafibrillar mineralization. The results of that model were further validated by complete remineralization of phosphoric-acid-etched dentin treated with the matrix phosphoprotein analog and lined with a remineralizing lining composite, and with the ACP-stabilization analog supplied in simulated body fluid. An understanding of the basic processes involved in intrafibrillar mineralization of reconstituted collagen fibrils facilitates the design of novel tissue engineering materials for hard tissue repair and regeneration.
Collapse
|
108
|
Parente JM, Loushine RJ, Susin L, Gu L, Looney SW, Weller RN, Pashley DH, Tay FR. Root canal debridement using manual dynamic agitation or the EndoVac for final irrigation in a closed system and an open system. Int Endod J 2010; 43:1001-12. [DOI: 10.1111/j.1365-2591.2010.01755.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
109
|
Cui N, Cao B, Liu YM, Liang LR, Gu L, Song SF, Guo P, Yin YD, Li F, Li BB, Su LL, Yang CX, Wang CL. OL-050 Clinical and economic impact of imipenem-resistant Acinetobacter baumannii in a teaching hospital in China. Int J Infect Dis 2010. [DOI: 10.1016/s1201-9712(10)60062-8] [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] Open
|
110
|
Demmy TL, Gu L, Burkhalter JE, Toloza EM, D'Amico TA, Sutherland S, Wang XF, Archer L, Veit LJ, Kohman L. Comparison of in-dwelling catheters and talc pleurodesis in the management of malignant pleural effusions. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.9031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
111
|
Capelletti M, Wang XF, Gu L, Graziano SL, Kratzke RA, Strauss GM, Maddaus M, Green MR, Vokes EE, Janne PA. Impact of KRAS mutations on adjuvant carboplatin/paclitaxel in surgically resected stage IB NSCLC: CALGB 9633. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.7008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
112
|
Li XY, Li J, Feng DF, Gu L. Diffuse axonal injury induced by simultaneous moderate linear and angular head accelerations in rats. Neuroscience 2010; 169:357-69. [PMID: 20451584 DOI: 10.1016/j.neuroscience.2010.04.075] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2010] [Revised: 04/12/2010] [Accepted: 04/26/2010] [Indexed: 11/19/2022]
Abstract
Diffuse axonal injury (DAI) is one of the most common and important pathologic features of human traumatic brain injury (TBI), accounting for high mortality and development of persistent post-traumatic neurologic sequelae. Although a relatively high number of therapies have been shown to be effective in experimental models, there are currently few treatments that are effective for improving the prognosis of clinical DAI. A major reason is the failure of current models to validly reproduce the pathophysiological characteristics observed after clinical DAI. In the present study, we employed a specially designed, highly controllable model to induce a sudden rotation in the coronal plane (75 degrees rotation at 1.6x10(4) degrees/s) combined with lateral translation (1.57 cm displacement at 3.4x10(2) cm/s) to the rat's head. We were interested in discovering whether the combined accelerations could reproduce the pathophysiological changes analogous to those seen in human DAI. The axonal injury as assessed with amyloid protein precursor (APP) as a marker was consistently present in all injured rats. The commonly injured brain regions included the subcortical regions, deep white matter, corpus callosum and brain stem. The evolution of APP accumulations in brain sections depicted the detailed progression of axonal pathology. Ultrastructural studies gave further insights into the presence and progression of axonal injury. All injured rats exhibited transient physiological dysfunction, as well as immediate and dramatic neurological impairment that still persisted at 14 days after injury. These results suggest that this model reproduced the major pathophysiological changes analogous to those observed after severe clinical TBI and provides an attractive vehicle for experimental brain injury research.
Collapse
|
113
|
Gu L, Dillenburger B, Roe AW. A novel dynamically induced 'pure illusory contour'. J Vis 2010. [DOI: 10.1167/6.6.331] [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
|
114
|
Kim J, Gu L, Breschi L, Tjäderhane L, Choi KK, Pashley DH, Tay FR. Implication of ethanol wet-bonding in hybrid layer remineralization. J Dent Res 2010; 89:575-80. [PMID: 20200419 DOI: 10.1177/0022034510363380] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
During mineralization, unbound water within the collagen matrix is replaced by apatite. This study tested the null hypothesis that there is no difference in the status of in vitro biomimetic remineralization of hybrid layers, regardless of their moisture contents. Acid-etched dentin was bonded with One-Step with ethanol-wet-bonding, water-wet-bonding, and water-overwet-bonding protocols. Composite-dentin slabs were subjected to remineralization for 1-4 months in a medium containing dual biomimetic analogs, with set Portland cement as the calcium source and characterized by transmission electron microscopy. Remineralization was either non-existent or restricted to the intrafibrillar mode in ethanol-wet-bonded specimens. Extensive intrafibrillar and interfibrillar remineralization was observed in water-wet-bonded specimens. Water-overwet specimens demonstrated partial remineralization of hybrid layers and precipitation of mineralized plates within water channels. The use of ethanol-wet-bonding substantiates that biomimetic remineralization is a progressive dehydration process that replaces residual water in hybrid layers with apatite crystallites.
Collapse
|
115
|
Kim YK, Yiu CKY, Kim JR, Gu L, Kim SK, Weller RN, Pashley DH, Tay FR. Failure of a glass ionomer to remineralize apatite-depleted dentin. J Dent Res 2010; 89:230-5. [PMID: 20110510 DOI: 10.1177/0022034509357172] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Remineralization of demineralized dentin lesions adjacent to glass-ionomer cements (GICs) has been reported in the literature. This study tested the hypothesis that a strontium-based GIC can remineralize completely demineralized dentin by nucleation of new apatite crystallites within an apatite-free dentin matrix. Human dentin specimens were acid-etched, bonded with Fuji IX(GP), and immersed in a calcium-and-phosphate-containing 1.5X simulated body fluid (SBF) for 1-4 months. Polyacrylic acid and polyvinylphosphonic acid biomimetic analogs were added to the SBFs to create 2 additional remineralization media. Specimens were processed by transmission electron microscopy (TEM). No apatite deposition could be identified in the completely demineralized dentin in any of the specimens immersed in the 3 remineralization media, despite TEM/EDX evidence of diffusion of ions specific to the strontium-based GIC into the demineralized dentin. The hypothesis was rejected; mineral concentration alone is not a sufficient endpoint for assessing the success of contemporary remineralization strategies.
Collapse
|
116
|
Gu L, Qiu L, Di W. P1016 TWEAK can inhibit the activity of ovarian cancer via macrophage. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62502-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
117
|
Qiu L, Dai L, Gu L, Di W. O764 TWEAK promotes ovarian cancer cell metastasis via NF-κB pathway activation and VEGF expression. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)61137-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
118
|
Su D, Ying L, Gao Y, Gu L, Sun W, Yu H, Katsaros D, Xu S. 8013 PDCD6 and ovarian cancer metastasis, findings of a proteomic study. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71535-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
|
119
|
Lai Q, Yuan J, Gu L, Shao Z. Marispirillum indicum gen. nov., sp. nov., isolated from a deep-sea environment. Int J Syst Evol Microbiol 2009; 59:1278-81. [DOI: 10.1099/ijs.0.003889-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
|
120
|
Chan L, Buckstein R, Reis M, Chesney A, Lam A, Cheung M, Piliotis E, Gu L, Wells R. P058 Intracellular ROS in bone marrow cells in myelodysplastic syndrome: technical and methodological considerations. Leuk Res 2009. [DOI: 10.1016/s0145-2126(09)70138-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
121
|
Chan L, Buckstein R, Reis M, Chesney A, Lam A, Cheung M, Piliotis E, Gu L, Wells R. P059 Changes in the level of intracellular reactive oxygen species in the hematopoietic progenitors of MDS and AML patients. Leuk Res 2009. [DOI: 10.1016/s0145-2126(09)70139-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
122
|
Chan L, Gu L, Wells R. C036 The effects of iron overload on hematopoiesis in the mouse. Leuk Res 2009. [DOI: 10.1016/s0145-2126(09)70074-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
123
|
Yuan J, Lai Q, Wang B, Sun F, Liu X, Du Y, Li G, Gu L, Zheng T, Shao Z. Oceanicola pacificus sp. nov., isolated from a deep-sea pyrene-degrading consortium. Int J Syst Evol Microbiol 2009; 59:1158-61. [DOI: 10.1099/ijs.0.003400-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
|
124
|
Nelayah J, Gu L, Sigle W, Koch CT, Pastoriza-Santos I, Liz-Marzán LM, van Aken PA. Direct imaging of surface plasmon resonances on single triangular silver nanoprisms at optical wavelength using low-loss EFTEM imaging. OPTICS LETTERS 2009; 34:1003-1005. [PMID: 19340200 DOI: 10.1364/ol.34.001003] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Using low-loss energy-filtering transmission electron microscopy (EFTEM) imaging, we map surface plasmon resonances (SPRs) at optical wavelengths on single triangular silver nanoprisms. We show that EFTEM imaging combining high spatial sampling and high energy resolution enables the detection and for the first time, to the best of our knowledge, mapping at the nanoscale of an extra multipolar SPR on these nanoparticles. As illustrated on a 276.5 nm long nanoprism, this eigenmode is found to be enhanced on the three edges where it exhibits a two-lobe distribution.
Collapse
|
125
|
Liu Q, Gu L, Dickinson RE, Tian Y, Zhou L, Post WM. Assimilation of satellite reflectance data into a dynamical leaf model to infer seasonally varying leaf areas for climate and carbon models. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd009645] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|