2301
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Pan K, Sun Q, Zhang J, Ge S, Li S, Zhao Y, Yang P. Multilineage differentiation of dental follicle cells and the roles of Runx2 over-expression in enhancing osteoblast/cementoblast-related gene expression in dental follicle cells. Cell Prolif 2010; 43:219-28. [PMID: 20546240 DOI: 10.1111/j.1365-2184.2010.00670.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES Dental follicle cells (DFCs) provide the origin of periodontal tissues, and Runx2 is essential for bone formation and tooth development. In this study, pluripotency of DFCs was evaluated and effects of Runx2 on them were investigated. MATERIALS AND METHODS The DFCs were induced to differentiate towards osteoblasts, adipocytes or chondrocytes, and alizarin red staining, oil red O staining or alcian blue staining was performed to reveal the differentiated states. Bone marrow stromal cells (BMSCs) and primary mouse fibroblasts served as controls. DFCs were also infected with recombinant retroviruses encoding either full-length Runx2 or mutant Runx2 without the VWRPY motif. Western blot analysis, real-time real time RT-PCR and in vitro mineralization assay were performed to evaluate the effects of full-length Runx2 or mutant Runx2 on osteogenic/cementogenic differentiation of the cells. RESULTS The above-mentioned staining methods demonstrated that DFCs were successfully induced to differentiate towards osteoblasts, adipocytes or chondrocytes respectively, confirming the existence of pluripotent mesenchymal stem cells in dental follicle tissues. However, staining intensity in DFC cultures was weaker than in BMSC cultures. Real-time PCR analysis indicated that mutant Runx2 induced a more pronounced increase in expression levels of OC, OPN, Col I and CP23 than full-length Runx2. Mineralization assay also showed that mutant Runx2 increased mineralization nodule formation more prominently than full-length Runx2. CONCLUSIONS Multipotent DFCs can be induced to differentiate towards osteoblasts, adipocytes or chondrocytes in vitro. Runx2 over-expression up-regulated expression levels of osteoblast/cementoblast-related genes and in vitro enhanced osteogenic differentiation of DFCs. In addition, mutant Runx2-induced changes in DFCs were more prominent than those induced by full-length Runx2.
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2302
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Tai C, Li S, Xu Q, Ying H, Huang H, Ouyang P. Chitosan production from hemicellulose hydrolysate of corn straw: impact of degradation products on Rhizopus oryzae growth and chitosan fermentation. Lett Appl Microbiol 2010; 51:278-84. [PMID: 20636326 DOI: 10.1111/j.1472-765x.2010.02893.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To examine the potential use of hemicellulose hydrolysate (HH) for the production of chitosan by Rhizopus oryzae and investigate the influence of contents in HH on mycelia growth and chitosan synthesis. METHODS AND RESULTS Compared to xylose medium, HH enhanced mycelia growth, chitosan content and production of R. oryzae by 10.2, 64.5 and 82.1%, respectively. During sulfuric acid hydrolysis of corn straw, sugars (glucose, galactose, etc) and inhibitors (formic acid, acetic acid and furfural) were generated. Acetic acid (2.14 g l(-1)) and formic acid (0.83 g l(-1)) were stimulative, while furfural (0.55 g l(-1)) was inhibitory. Inhibitors, at different concentrations, increased the mycelia growth and chitosan production by 24.5-37.8 and 60.1-207.1%. CONCLUSIONS HH of corn straw is a good source for chitosan production. Inhibitors in HH, at proper concentrations, can enhance chitosan production greatly. SIGNIFICANCE AND IMPACT OF THE STUDY This work for the first time reported chitosan production from HH. Chitosan production can be greatly enhanced by cheap chemicals such as inhibitors in HH.
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2303
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Chen Y, Peng C, Sullivan C, Li D, Li S. Critical molecular pathways in cancer stem cells of chronic myeloid leukemia. Leukemia 2010; 24:1545-54. [PMID: 20574455 DOI: 10.1038/leu.2010.143] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Inhibition of BCR-ABL with kinase inhibitors in the treatment of Philadelphia-positive (Ph(+)) chronic myeloid leukemia (CML) is highly effective in controlling but not curing the disease. This is largely due to the inability of these kinase inhibitors to kill leukemia stem cells (LSCs) responsible for disease relapse. This stem cell resistance is not associated with the BCR-ABL kinase domain mutations resistant to kinase inhibitors. Development of curative therapies for CML requires the identification of crucial molecular pathways responsible for the survival and self-renewal of LSCs. In this review, we will discuss our current understanding of these crucial molecular pathways in LSCs and the available therapeutic strategies for targeting these stem cells in CML.
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2304
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Zhang M, Li S, Deng H, Zhou S. SU-GG-T-359: The Applications of MatriXX to Electron Beam Dosimetry. Med Phys 2010. [DOI: 10.1118/1.3468756] [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
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2305
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Liu Z, Li S, Chan P, Miyamoto C, Micaily B. WE-C-BRA-03: Influence of Body Compression on Localization Accuracy of Thoracic Tumors Using Fractionated Stereotactic Body Radiotherapy. Med Phys 2010. [DOI: 10.1118/1.3469365] [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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2306
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Chen S, Zhou S, Wahl A, Li S, Thompson R, Enke C. SU-GG-T-68: Dosimetric Effect of the Source Position Uncertainty for the Mammosite-Based Brachytherapy. Med Phys 2010. [DOI: 10.1118/1.3468454] [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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2307
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Li S, Liu Z, Chan P, Micaily B, Miyamoto C. WE-C-204B-01: Target Definition of Lung Tumors Combining Patient Specific Pharmacokinetics and Lung Nodule Motion with SUV Distributions in PET-CT Scans. Med Phys 2010. [DOI: 10.1118/1.3469373] [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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2308
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Hale M, Khan A, Kutch M, Li S. Once-daily OROS hydromorphone ER compared with placebo in opioid-tolerant patients with chronic low back pain. Curr Med Res Opin 2010; 26:1505-18. [PMID: 20429852 DOI: 10.1185/03007995.2010.484723] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE This multicenter, double-blind, placebo-controlled study using a randomized withdrawal design evaluated the efficacy and safety of once-daily OROS hydromorphone ER in the treatment of opioid-tolerant patients with chronic moderate-to-severe low back pain (LBP). MAIN OUTCOME MEASURES The primary efficacy assessment was mean change in pain intensity based on patient diary Numeric Rating Scale (NRS) scores from baseline to final visit of the 12-week double-blind phase. Secondary endpoints included mean change from baseline to each visit in patient diary NRS scores; and office NRS scores; time to treatment failure; Patient Global Assessment; rescue medication use; and Roland Morris Disability Questionnaire total scores. CLINICAL TRIAL REGISTRATION ClinicalTrials.gov NCT00549042. RESULTS For the primary outcome measure, hydromorphone ER significantly reduced pain intensity compared to placebo (p < 0.001). Median diary NRS score change from baseline to endpoint was significantly lower for OROS [corrected] hydromorphone ER (0.2 units) compared to placebo (1.6 units). [corrected] A significantly higher proportion of hydromorphone ER (60.6%) vs. placebo (42.9%) patients had at least a 30% reduction in diary NRS pain score from screening to endpoint (p < 0.01). Hydromorphone ER was well-tolerated, although 60 (13%) discontinued during the enrichment phase for adverse events and more active (9, 6.7%) than placebo (4, 3.0%) patients discontinued treatment for adverse events during the randomized phase. CONCLUSIONS These results provide evidence for the efficacy and safety of hydromorphone ER in opioid-tolerant patients with chronic moderate-to-severe LBP. Potential limitations include the shortened dose-conversion/titration phase, limiting the daily allowable dose of hydromorphone ER to 64 mg, and the allowance of limited rescue medication throughout the entire double-blind phase. Other trial design elements such as the use of an enrichment phase and the inclusion of only opioid tolerant patients may limit the generalizability of these results.
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2309
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Zhou S, Li S, Chen S, Deng H, Zhang M, Schubert L, Du H, Wahl A, Enke C. SU-GG-J-98: Study of Patient Setup Error and Inter-Fractional Organ Motion for Prostatectomy Patients Using CT-on-Rails. Med Phys 2010. [DOI: 10.1118/1.3468322] [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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2310
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Zhang J, Li S, Li M. A comparison of self-organizing feature map clustering with TWINSPAN and fuzzy C-means clustering in the analysis of woodland communities in the Guancen Mts, China. COMMUNITY ECOL 2010. [DOI: 10.1556/comec.11.2010.1.17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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2311
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Li S, Sun Z, Wang J, Yang T. P43 N-TERMINAL PRO-BRAIN NATRIURETIC PEPTIDE BUT NOT HIGH-SENSITIVITY C-REACTIVE PROTEIN IS RELATED TO SEVERITY OF CORONARY STENOSIS IN ACUTE CORONARY SYNDROME. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70110-0] [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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2312
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Li S, Liang J, Zhang T, Yan D. SU-GG-I-110: Improving Head and Neck (HN) Cone Beam Computed Tomography (CBCT) Deformable Image Registration by Using Auto- Skin Detection. Med Phys 2010. [DOI: 10.1118/1.3468143] [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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2313
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Du H, Li S, Zhou S, Deng H, Zhang M, Chen S, Schubert L. SU-GG-T-354: Development and Evaluation of a Low Cost, EBT2 Film-Based Real-Time Dosimeter. Med Phys 2010. [DOI: 10.1118/1.3468751] [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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2314
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Miyamoto C, Li S, Schell M. WE-A-BRB-01: Single and Hypo-Fractionated Stereotactic Irradiation of Brain & Body Lesions. Med Phys 2010. [DOI: 10.1118/1.3469327] [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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2315
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Deng H, Li S. SU-GG-T-529: Fully Automated Patient Specific Collision Check for Novalis Radiosurgery System. Med Phys 2010. [DOI: 10.1118/1.3468926] [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
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2316
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Li S, Hadley S, Meeks S. TH-B-204B-01: Advanced Optical Imaging and Tracking Techniques for IGRT. Med Phys 2010. [DOI: 10.1118/1.3469470] [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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2317
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Li S, Liu Z, Chan P, Micaily B, Miyamoto C. SU-GG-T-233: An Integration Calculation Method for Dose Verification of Arc-Based Radiotherapy. Med Phys 2010. [DOI: 10.1118/1.3468624] [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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2318
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Liu J, Grierson DS, Moldovan N, Notbohm J, Li S, Jaroenapibal P, O'Connor SD, Sumant AV, Neelakantan N, Carlisle JA, Turner KT, Carpick RW. Preventing nanoscale wear of atomic force microscopy tips through the use of monolithic ultrananocrystalline diamond probes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:1140-1149. [PMID: 20486220 DOI: 10.1002/smll.200901673] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Nanoscale wear is a key limitation of conventional atomic force microscopy (AFM) probes that results in decreased resolution, accuracy, and reproducibility in probe-based imaging, writing, measurement, and nanomanufacturing applications. Diamond is potentially an ideal probe material due to its unrivaled hardness and stiffness, its low friction and wear, and its chemical inertness. However, the manufacture of monolithic diamond probes with consistently shaped small-radius tips has not been previously achieved. The first wafer-level fabrication of monolithic ultrananocrystalline diamond (UNCD) probes with <5-nm grain sizes and smooth tips with radii of 30-40 nm is reported, which are obtained through a combination of microfabrication and hot-filament chemical vapor deposition. Their nanoscale wear resistance under contact-mode scanning conditions is compared with that of conventional silicon nitride (SiN(x)) probes of similar geometry at two different relative humidity levels (approximately 15 and approximately 70%). While SiN(x) probes exhibit significant wear that further increases with humidity, UNCD probes show little measurable wear. The only significant degradation of the UNCD probes observed in one case is associated with removal of the initial seed layer of the UNCD film. The results show the potential of a new material for AFM probes and demonstrate a systematic approach to studying wear at the nanoscale.
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2319
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Mardis E, Ding L, Li S, Larson DE, Chen K, Wallis J, Hoog J, Deshryver K, Wilson R, Ellis MJ. Massive parallel sequencing of an African-American basal-like breast cancer: Comparison of primary tumor, metastasis, and xenograft. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.10500] [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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2320
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Arneson T, Li S, Gilbertson DT, Dunning SC, Bridges KR, Acquavella JF. Impact of Medicare's July 2007 erythropoiesis-stimulating agent (ESA) national coverage determination (NCD) on transfusion use in chemotherapy-treated cancer patients. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6071] [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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2321
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Su Y, Lee C, Hong S, Lin H, Li S, Yu C, Tung Y. Correlation of expression of haptoglobin and recurrence in head and neck squamous cell cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.5543] [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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2322
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Li YJ, Xia ZJ, Li S, Chen XQ, Xia Y, Xu F, Wang ZH. Maintenance rituximab versus observation after R-CHOP or R-EPOCH in patients with untreated poor-prognosis diffuse large B-cell lymphoma and grade III follicular lymphoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.8084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2323
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Huang W, Wu J, Lin X, Li S, Liu R, Hu W, Xia Y, Zhang L, Jiang W, Guan Z. A multicenter, open-label, randomized phase II trial of adenovirus-mediated endostatin gene therapy in combination with paclitaxel and cisplatin chemotherapy in advanced head and neck carcinoma: Preliminary results. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e16005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2324
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Jack DA, Yeh CS, Liang Z, Li S, Park JG, Fielding JC. Electrical conductivity modeling and experimental study of densely packed SWCNT networks. NANOTECHNOLOGY 2010; 21:195703. [PMID: 20407145 DOI: 10.1088/0957-4484/21/19/195703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Single-walled carbon nanotube (SWCNT) networks have become a subject of interest due to their ability to support structural, thermal and electrical loadings, but to date their application has been hindered due, in large part, to the inability to model macroscopic responses in an industrial product with any reasonable confidence. This paper seeks to address the relationship between macroscale electrical conductivity and the nanostructure of a dense network composed of SWCNTs and presents a uniquely formulated physics-based computational model for electrical conductivity predictions. The proposed model incorporates physics-based stochastic parameters for the individual nanotubes to construct the nanostructure such as: an experimentally obtained orientation distribution function, experimentally derived length and diameter distributions, and assumed distributions of chirality and registry of individual CNTs. Case studies are presented to investigate the relationship between macroscale conductivity and nanostructured variations in the bulk stochastic length, diameter and orientation distributions. Simulation results correspond nicely with those available in the literature for case studies of conductivity versus length and conductivity versus diameter. In addition, predictions for the increasing anisotropy of the bulk conductivity as a function of the tube orientation distribution are in reasonable agreement with our experimental results. Examples are presented to demonstrate the importance of incorporating various stochastic characteristics in bulk conductivity predictions. Finally, a design consideration for industrial applications is discussed based on localized network power emission considerations and may lend insight to the design engineer to better predict network failure under high current loading applications.
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2325
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Lin J, Wang N, Li Y, Liu Z, Tian S, Zhao L, Zheng Y, Liu S, Li S, Jin C, Xia B. LEC–BiFC: a new method for rapid assay of protein interaction. Biotech Histochem 2010; 86:272-9. [DOI: 10.3109/10520295.2010.483068] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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