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Yang J, Lu Y, Lyu Q, Kuang Y. Resistin decreases the expression of endometrial receptivity related factors through binding to toll-like receptor 4 in endometrial epithelial cells. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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52
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Du T, Chen H, Lyu Q, Kuang Y. Recurrent ectopic pregnancy history is one of the risk factors of intrauterine implantation failure in women undergoing frozen-thawed embryo transfer cycles. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.1069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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53
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Luo Z, Zeng W, Tang W, Long T, Zhang J, Xie X, Kuang Y, Chen M, Su J, Chen X. CD147 interacts with NDUFS6 in regulating mitochondrial complex I activity and the mitochondrial apoptotic pathway in human malignant melanoma cells. Curr Mol Med 2015; 14:1252-64. [PMID: 25470292 DOI: 10.2174/1566524014666141202144601] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 09/03/2013] [Accepted: 02/24/2014] [Indexed: 11/22/2022]
Abstract
Malignant melanoma (MM) is one of the most lethal tumors and is characterized by high invasiveness, frequent metastasis, and resistance to chemotherapy. The risk of metastatic MM is accompanied by disordered energy metabolism involving the oxidative phosphorylation (OXPHOS) process, which is largely carried out in mitochondrial complexes. Complex I is the first and largest mitochondrial enzyme complex associated with this process. CD147 is a transmembrane glycoprotein mainly expressed on the cell surface, and also appears in the cytoplasm in some tumors. We found that CD147 is often translocated to the cytoplasm in metastatic MM specimens as compared to primary MM. We also demonstrated high expression of CD147 in isolated mitochondrial fractions of A375 cells. The yeast two-hybrid (Y2H) assay identified NDUFS6 (which encodes a subunit of mitochondrial respiratory chain complex I) as a candidate that interacts with CD147 and depletion of CD147 in A375 cells significantly decreased complex I enzyme activity. We also showed that CD147 increased the viability of A375 cells exposed to berberine-induced mitochondrial damage, and protected them from apoptosis through a mitochondrial-dependent pathway. This finding was confirmed by adding exogenous Bcl-2 to A375 cell cultures. In summary, our results identify the existence of CD147 in human melanoma cell mitochondria. They indicate that CD147 appears to regulate complex I activity and apoptosis in MM by interacting with mitochondrial NDUFS6. Our findings provide new insight into the function of CD147 and identify it as a promising therapeutic target in melanoma through disruption of the energy metabolism.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - X Chen
- (X. Chen) Department of Dermatology, XiangYa Hospital, Central South University, 87 XiangYa Road, Changsha, Hunan 410008, China.
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54
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Zhang W, Shen W, Zhu S, Wan S, Luo Y, Yan J, Wang K, Liu L, Dai H, Li P, Dai K, Zhang W, Liu Z, Wang F, Kuang Y, Li Z, Lin Y, Rao X, Li J, Zou B, Cai X, Mo J, Zhao P, Ye Q, Huang J, Fu S. CAN Canopy Addition of Nitrogen Better Illustrate the Effect of Atmospheric Nitrogen Deposition on Forest Ecosystem? Sci Rep 2015; 5:11245. [PMID: 26059183 PMCID: PMC4462050 DOI: 10.1038/srep11245] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 05/18/2015] [Indexed: 11/10/2022] Open
Abstract
Increasing atmospheric nitrogen (N) deposition could profoundly impact community structure and ecosystem functions in forests. However, conventional experiments with understory addition of N (UAN) largely neglect canopy-associated biota and processes and therefore may not realistically simulate atmospheric N deposition to generate reliable impacts on forest ecosystems. Here we, for the first time, designed a novel experiment with canopy addition of N (CAN) vs. UAN and reviewed the merits and pitfalls of the two approaches. The following hypotheses will be tested: i) UAN overestimates the N addition effects on understory and soil processes but underestimates those on canopy-associated biota and processes, ii) with low-level N addition, CAN favors canopy tree species and canopy-dwelling biota and promotes the detritus food web, and iii) with high-level N addition, CAN suppresses canopy tree species and other biota and favors rhizosphere food web. As a long-term comprehensive program, this experiment will provide opportunities for multidisciplinary collaborations, including biogeochemistry, microbiology, zoology, and plant science to examine forest ecosystem responses to atmospheric N deposition.
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Affiliation(s)
- Wei Zhang
- 1] Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China [2] Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 73019, USA
| | - Weijun Shen
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Shidan Zhu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Shiqiang Wan
- State Key Laboratory of Cotton Biology, Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng, Henan 475004, China
| | - Yiqi Luo
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 73019, USA
| | - Junhua Yan
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Keya Wang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Lei Liu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Huitang Dai
- Jigongshan National Natural Reserve, Xinyang, Henan 464000, China
| | - Peixue Li
- Jigongshan National Natural Reserve, Xinyang, Henan 464000, China
| | - Keyuan Dai
- Shimentai National Natural Reserve, Yingde, Guangdong 513000, China
| | - Weixin Zhang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Zhanfeng Liu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Faming Wang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Yuanwen Kuang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Zhian Li
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Yongbiao Lin
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Xingquan Rao
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Jiong Li
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Bi Zou
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Xian Cai
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Jiangming Mo
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Ping Zhao
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Qing Ye
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Jianguo Huang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Shenglei Fu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
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Wu L, Zhang W, Kwee S, Li M, Peng X, Xie L, Lin Z, Wang H, Kuang Y. SU-C-BRA-01: 18F-NaF PET/CT-Directed Dose Escalation in Stereotactic Body Radiotherapy for Spine Oligometastases From Prostate Cancer. Med Phys 2015. [DOI: 10.1118/1.4923811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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56
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Wu L, Lu J, Kwee S, Li M, Peng X, Xie L, Lin Z, Kuang Y. EP-1518: 18F-NaF PET/CT-guided boost stereotactic body radiation therapy for bone metastases from prostate cancer. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)41510-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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57
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Affiliation(s)
- Zhuan Hao
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 China
- College of Life Sciences University of Chinese Academy of Sciences Beijing 10049 China
| | - Yuanwen Kuang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 China
| | - Ming Kang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 China
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58
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Li X, Diao X, Shan G, Kuang Y. Development of Magnetic Field Configurations in a 6 MV Linac-MRI. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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59
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Kuang Y, Chen Q, Hong Q, Lyu Q, Ai A, Fu Y, Zeev S. Double stimulations during the follicular and luteal phases in patients with poor ovarian response in IVF/ICSI programs (the shanghai protocol). Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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60
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Chai W, Chen Q, Yan Z, Xue S, Lyu Q, Kuang Y. Clinical outcomes of day7 vitrified-thawed blastocyst transfer in patients with slow development of embryos. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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61
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Huang B, Lu J, Lin P, Chen J, Kuang Y, Chen C. Optimizing Dose Delivery Strategies in Stereotactic Body Radiation Therapy of Early-Stage Non-Small Cell Lung Cancer With RapidArc and Flattering Filter–Free Beams. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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62
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Zeng W, Su J, Wu L, Yang D, Long T, Li D, Kuang Y, Li J, Qi M, Zhang J, Chen X. CD147 promotes melanoma progression through hypoxia-induced MMP2 activation. Curr Mol Med 2014; 14:163-73. [PMID: 24090196 DOI: 10.2174/15665240113136660077] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 09/25/2013] [Accepted: 09/27/2013] [Indexed: 11/22/2022]
Abstract
Hypoxia enhances MMP2 expression and the invasion and metastatic potential of melanoma cells. CD147 has been shown to induce MMP2 in multiple cancers. To investigate the role of CD147 in hypoxiainduced MMP2 activation, we performed immunohistochemistry (IHC) staining in 206 normal and melanoma tissue samples, and analyzed the correlation between HIF1α and CD147. ChIP (chromosome Immunoprecipitation) in melanoma cell lines supports that HIF1α directly binds to CD147 promoter. Moreover, we made a series of deletion mutants of CD147 promoter, and identified a conserved HIF1α binding site. Point mutation in this site significantly decreased CD147 response to hypoxia. Importantly, knocking down CD147 attenuates MMP2 response to hypoxia in melanoma cell lines. MMP2 could not be efficiently activated by hypoxia in CD147 depletion cells. ELISA data showed that MMP2 secretion was reduced in CD147 depletion cells than control under hypoxia condition. To verify the data from cell culture model, we performed in vivo mouse xenograft experiment. IHC staining showed reduced MMP2 level in CD147 depleted xenografts compared to the control group, with the HIF1α level being comparable. Our study demonstrates a novel pathway mediated by CD147 to promote the MMP2 activation induced by hypoxia, and helps to understand the interplay between hypoxia and melanoma progression.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - X Chen
- (X. Chen) 87 Xiangya Road, Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China.
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63
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Everett RA, Packer AM, Kuang Y. Can Mathematical Models Predict the Outcomes of Prostate Cancer Patients Undergoing Intermittent Androgen Deprivation Therapy? ACTA ACUST UNITED AC 2014. [DOI: 10.1142/s1793048014300023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Androgen deprivation therapy is a common treatment for advanced or metastatic prostate cancer. Like the normal prostate, most tumors depend on androgens for proliferation and survival but often develop treatment resistance. Hormonal treatment causes many undesirable side effects which significantly decrease the quality of life for patients. Intermittently applying androgen deprivation in cycles reduces the total duration with these negative effects and may reduce selective pressure for resistance. We extend an existing model which used measurements of patient testosterone levels to accurately fit measured serum prostate specific antigen (PSA) levels. We test the model's predictive accuracy, using only a subset of the data to find parameter values. The results are compared with those of an existing piecewise linear model which does not use testosterone as an input. Since actual treatment protocol is to re-apply therapy when PSA levels recover beyond some threshold value, we develop a second method for predicting the PSA levels. Based on a small set of data from seven patients, our results showed that the piecewise linear model produced slightly more accurate results while the two predictive methods are comparable. This suggests that a simpler model may be more beneficial for a predictive use compared to a more biologically insightful model, although further research is needed in this field prior to implementing mathematical models as a predictive method in a clinical setting. Nevertheless, both models are an important step in this direction.
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Affiliation(s)
- R. A. Everett
- School of Mathematical and Statistical Sciences, Arizona State University, Tempe, AZ 85287, USA
| | - A. M. Packer
- School of Mathematical and Statistical Sciences, Arizona State University, Tempe, AZ 85287, USA
| | - Y. Kuang
- School of Mathematical and Statistical Sciences, Arizona State University, Tempe, AZ 85287, USA
- Department of Mathematics, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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64
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Alzahrani EO, Asiri A, El-Dessoky MM, Kuang Y. Quiescence as an explanation of Gompertzian tumor growth revisited. Math Biosci 2014; 254:76-82. [PMID: 24968353 DOI: 10.1016/j.mbs.2014.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 06/06/2014] [Accepted: 06/12/2014] [Indexed: 01/08/2023]
Abstract
Gompertz's empirical equation remains the most popular one in describing cancer cell population growth in a wide spectrum of bio-medical situations due to its good fit to data and simplicity. Many efforts were documented in the literature aimed at understanding the mechanisms that may support Gompertz's elegant model equation. One of the most convincing efforts was carried out by Gyllenberg and Webb. They divide the cancer cell population into the proliferative cells and the quiescent cells. In their two dimensional model, the dead cells are assumed to be removed from the tumor instantly. In this paper, we modify their model by keeping track of the dead cells remaining in the tumor. We perform mathematical and computational studies on this three dimensional model and compare the model dynamics to that of the model of Gyllenberg and Webb. Our mathematical findings suggest that if an avascular tumor grows according to our three-compartment model, then as the death rate of quiescent cells decreases to zero, the percentage of proliferative cells also approaches to zero. Moreover, a slow dying quiescent population will increase the size of the tumor. On the other hand, while the tumor size does not depend on the dead cell removal rate, its early and intermediate growth stages are very sensitive to it.
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Affiliation(s)
- E O Alzahrani
- Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Asim Asiri
- Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - M M El-Dessoky
- Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Department of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Y Kuang
- School of Mathematical and Statistical Sciences, Arizona State University, Tempe, AZ 85287, USA.
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65
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Wu L, Huang B, Rowedder B, Ma B, Kuang Y. TH-E-BRE-05: Analysis of Dosimetric Characteristics in Two Leaf Motion Calculator Algorithms for Sliding Window IMRT. Med Phys 2014. [DOI: 10.1118/1.4889657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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66
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Li X, Diao X, Ma B, Kuang Y. WE-G-17A-09: Novel Magnetic Shielding Design for Inline and Perpendicular Integrated 6 MV Linac and 1.0 T MRI Systems. Med Phys 2014. [DOI: 10.1118/1.4889511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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67
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Ma B, Li X, Kuang Y. SU-E-QI-07: Early Evaluation of Tumor Response to Therapy Via More Accurate Apparent Diffusion Coefficient Maps. Med Phys 2014. [DOI: 10.1118/1.4888987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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68
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Huang B, Lu J, Lin P, Chen J, Kuang Y, Chen C. TH-C-12A-02: Comparison of Two RapidArc Delivery Strategies in Stereotactic Body Radiotherapy of Stage I and II Peripheral Lung Tumors with Unflattened Beams. Med Phys 2014. [DOI: 10.1118/1.4889639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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69
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Zhou S, Liu L, Li H, Eilers G, Kuang Y, Shi S, Yan Z, Li X, Corson JM, Meng F, Zhou H, Sheng Q, Fletcher JA, Ou WB. Multipoint targeting of the PI3K/mTOR pathway in mesothelioma. Br J Cancer 2014; 110:2479-88. [PMID: 24762959 PMCID: PMC4021537 DOI: 10.1038/bjc.2014.220] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 03/20/2014] [Accepted: 03/27/2014] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Mesothelioma is a notoriously chemotherapy-resistant neoplasm, as is evident in the dismal overall survival for patients with those of asbestos-associated disease. We previously demonstrated co-activation of multiple receptor tyrosine kinases (RTKs), including epidermal growth factor receptor (EGFR), MET, and AXL in mesothelioma cell lines, suggesting that these kinases could serve as novel therapeutic targets. Although clinical trials have not shown activity for EGFR inhibitors in mesothelioma, concurrent inhibition of various activated RTKs has pro-apoptotic and anti-proliferative effects in mesothelioma cell lines. Thus, we hypothesised that a coordinated network of multi-RTK activation contributes to mesothelioma tumorigenesis. METHODS Activation of PI3K/AKT/mTOR, Raf/MAPK, and co-activation of RTKs were evaluated in mesotheliomas. Effects of RTK and downstream inhibitors/shRNAs were assessed by measuring mesothelioma cell viability/growth, apoptosis, activation of signalling intermediates, expression of cell-cycle checkpoints, and cell-cycle alterations. RESULTS We demonstrate activation of the PI3K/AKT/p70S6K and RAF/MEK/MAPK pathways in mesothelioma, but not in non-neoplastic mesothelial cells. The AKT activation, but not MAPK activation, was dependent on coordinated activation of RTKs EGFR, MET, and AXL. In addition, PI3K/AKT/mTOR pathway inhibition recapitulated the anti-proliferative effects of concurrent inhibition of EGFR, MET, and AXL. Dual targeting of PI3K/mTOR by BEZ235 or a combination of RAD001 and AKT knockdown had a greater effect on mesothelioma proliferation and viability than inhibition of individual activated RTKs or downstream signalling intermediates. Inhibition of PI3K/AKT was also associated with MDM2-p53 cell-cycle regulation. CONCLUSIONS These findings show that PI3K/AKT/mTOR is a crucial survival pathway downstream of multiple activated RTKs in mesothelioma, underscoring that PI3K/mTOR is a compelling target for therapeutic intervention.
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Affiliation(s)
- S Zhou
- 1] Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China [2] Department of Bioengineering, College of Biology and Chemical Engineering, Jiaxing University, Jiaxing, China
| | - L Liu
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China
| | - H Li
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China
| | - G Eilers
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Y Kuang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou, China
| | - S Shi
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China
| | - Z Yan
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China
| | - X Li
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China
| | - J M Corson
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - F Meng
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China
| | - H Zhou
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China
| | - Q Sheng
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou, China
| | - J A Fletcher
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - W-B Ou
- 1] Zhejiang Provincial Key Laboratory of Applied Enzymology, Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China [2] Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA [3] Department of Biochemistry and Molecular Biology, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou, China
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Liu BR, Kong XC, Cui GX, Zhang XY, Song JT, Kuang Y, Kong LJ, Si Y. Pure transgastric NOTES in an adnexal procedure: the first human case report. Endoscopy 2014; 45 Suppl 2 UCTN:E290-1. [PMID: 24008471 DOI: 10.1055/s-0033-1344559] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- B-R Liu
- Department of Gastroenterology and Hepatology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China.
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Xiao Y, Tong F, Kuang Y, Chen B. Distribution and source apportionment of polycyclic aromatic hydrocarbons (PAHs) in forest soils from urban to rural areas in the Pearl River Delta of Southern China. Int J Environ Res Public Health 2014; 11:2642-56. [PMID: 24599040 PMCID: PMC3986996 DOI: 10.3390/ijerph110302642] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 02/14/2014] [Accepted: 02/17/2014] [Indexed: 11/16/2022]
Abstract
The upper layer of forest soils (0-20 cm depth) were collected from urban, suburban, and rural areas in the Pearl River Delta of Southern China to estimate the distribution and the possible sources of polycyclic aromatic hydrocarbons (PAHs). Total concentrations of PAHs in the forest soils decreased significantly along the urban-suburban-rural gradient, indicating the influence of anthropogenic emissions on the PAH distribution in forest soils. High and low molecular weight PAHs dominated in the urban and rural forest soils, respectively, implying the difference in emission sources between the areas. The values of PAH isomeric diagnostic ratios indicated that forest soil PAHs were mainly originated from traffic emissions, mixed sources and coal/wood combustion in the urban, suburban and rural areas, respectively. Principal component analysis revealed that traffic emissions, coal burning and residential biomass combustion were the three primary contributors to forest soil PAHs in the Pearl River Delta. Long range transportation of PAHs via atmosphere from urban area might also impact the PAHs distribution in the forest soils of rural area.
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Affiliation(s)
- Yihua Xiao
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
| | - Fuchun Tong
- College of Forestry, South China Agricultural University, Guangzhou 510642, China.
| | - Yuanwen Kuang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
| | - Bufeng Chen
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China.
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72
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Kuang Y, Jin Y, Cochran S, Huang Z. Resonance tracking and vibration stablilization for high power ultrasonic transducers. Ultrasonics 2014; 54:187-194. [PMID: 23928264 DOI: 10.1016/j.ultras.2013.07.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 05/08/2013] [Accepted: 07/03/2013] [Indexed: 06/02/2023]
Abstract
Resonant frequency shift and electrical impedance variation are common phenomena in the application of high power ultrasonic transducers, e.g. in focused ultrasound surgery and in cutting. They result in low power efficiency and unstable vibration amplitude. To solve this problem, a driving and measurement system has been developed to track the resonance of high power transducers and to stabilise their vibration velocity. This has the ability to monitor the operating and performance parameters of the ultrasonic transducers in real time. The configuration of the system, with its control algorithm implemented in LabVIEW (National Instruments, Newbury, UK), ensures flexibility to suit different transducers and load conditions. In addition, with different programs, it can be utilised as a high power impedance analyser or an instantaneous electrical power measurement system for frequencies in the MHz range. The effectiveness of this system has been demonstrated in detailed studies. With it, high transducer performance at high power can be achieved and monitored in real time.
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Affiliation(s)
- Y Kuang
- School of Engineering, Physics and Mathematics, University of Dundee, Dundee DD1 4HN, UK
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73
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Rowedder B, Ma B, Kuang Y. EP-1536: Monte Carlo simulation of proton beams and CTs using GATE in a cloud computing environment. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31654-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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74
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Zeng W, Su J, Wu L, Yang D, Long T, Li D, Kuang Y, Li J, Zhang J, Ruben Agregan XC. CD147 Promotes Melanoma Progression Through Hypoxia-Induced MMP2 Activation. Curr Mol Med 2013. [DOI: 10.2174/15665240111888131028123217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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75
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Di Vece M, van Duren SNF, van den Heuvel DJ, Mitoraj D, Kuang Y, Gerritsen HC, Schropp REI. Switching CdSe quantum dot luminescence with a-Si:H. Nanotechnology 2013; 24:315202. [PMID: 23851583 DOI: 10.1088/0957-4484/24/31/315202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Dynamical control of the luminescence of quantum dots is highly important for technology in the field of telecommunication, displays, and photovoltaics. In this work we use an a-Si:H solar cell structure in which CdSe quantum dots are sandwiched. By applying a positive potential over the device, charge carriers generated in the quantum dots are transported to the a-Si:H layer and transformed into electrical energy, changing the luminescence intensity with a switching time lower than 60 ms. This is a promising new step towards using quantum dots in optical switching devices.
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Affiliation(s)
- M Di Vece
- Debye Institute for Nanomaterials Science, Nanophotonics-Physics of Devices, Utrecht University, Utrecht, The Netherlands.
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76
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Yang Z, Liu J, Kuang Y, Terigima S, Salem R, Tang Y, Niu J, Li P, Ye DS, Chen X, Zheng HY, Li L, Duan FH, Chen SL, Sadek K, Bruce K, Macklon N, Cheong Y, Cagampang F, Swann K, Campbell BK, Raine-Fenning N, Jayaprakasan K, Maalouf W. Session 46: Epigenetics in reproductive health. Hum Reprod 2013. [DOI: 10.1093/humrep/det179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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77
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Rowedder B, Kuang Y. SU-E-T-18: GATE Monte Carlo Simulation in a Cloud Computing Environment. Med Phys 2013. [DOI: 10.1118/1.4814452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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78
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Wang J, Kuang Y, Zhang L, Shen C, Wang L, Lu S, Lu X, Fei J, Gu M, Wang Z. Phenotypic correction and stable expression of factor VIII in hemophilia A mice by embryonic stem cell therapy. Genet Mol Res 2013; 12:1511-21. [DOI: 10.4238/2013.may.13.4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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79
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Bazalova M, Pratx G, Kuang Y, Xing L. X-ray Imaging Beyond Transmission CT: Detecting Low Concentrations of Gold Nanoparticles. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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80
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Jiang B, Chen Q, Liu X, Kong D, Kuang Y, Weng X, Chen H. Ischemic Postconditioning Protects Renal Function After 24 Hours of Cold Preservation in a Canine Autotransplantation Model. Transplant Proc 2012; 44:1776-81. [DOI: 10.1016/j.transproceed.2012.05.040] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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81
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Bazalova M, Kuang Y, Pratx G, Xing L. TH-A-213CD-01: Compton Scatter in X-Ray Fluorescence CT Imaging. Med Phys 2012. [DOI: 10.1118/1.4736537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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82
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Kuang Y, Pratx G, Qian J, Meng B, Bazalova M, Xing L. WE-C-217BCD-07: Best in Physics (Joint Eyiaging-Therapy) - Direct Imaging of the Uptake of Platinum Anticancer Agents Using X-Ray Stimulated Fluorescence: A Proof-Of-Concept Study. Med Phys 2012; 39:3950-3951. [DOI: 10.1118/1.4736123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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83
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Kuang Y, Pratx G, Meng B, Qian J, Bazalova M, Xing L. TH-A-213CD-02: BEST IN PHYSICS (IMAGING) - The Feasibility of Multiplexed Biomarker Detection Using X-Ray Stimulated Fluorescence Imaging. Med Phys 2012. [DOI: 10.1118/1.4736264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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84
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Bar-Natan M, Nelson EA, Walker SR, Kuang Y, Distel RJ, Frank DA. Dual inhibition of Jak2 and STAT5 enhances killing of myeloproliferative neoplasia cells. Leukemia 2011; 26:1407-10. [DOI: 10.1038/leu.2011.338] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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85
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Zhang LL, Wang JJ, Liu Y, Lu XB, Kuang Y, Wan YH, Chen Y, Yan HM, Fei J, Wang ZG. GPR26-deficient mice display increased anxiety- and depression-like behaviors accompanied by reduced phosphorylated cyclic AMP responsive element-binding protein level in central amygdala. Neuroscience 2011; 196:203-14. [DOI: 10.1016/j.neuroscience.2011.08.069] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 08/21/2011] [Accepted: 08/31/2011] [Indexed: 01/27/2023]
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86
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87
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Xue S, Lyu Q, Peng Q, Cao S, Zhou Y, Kuang Y. Vitrification yields superior efficiency of human cleavage-stage embryo cryopreservation versus slow-freezing. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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88
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Zamiri P, Kuang Y, Sharma U, Ng TF, Busold RH, Rago AP, Core LA, Palasis M. The biocompatibility of rapidly degrading polymeric stents in porcine carotid arteries. Biomaterials 2010; 31:7847-55. [PMID: 20696471 DOI: 10.1016/j.biomaterials.2010.06.057] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Accepted: 06/28/2010] [Indexed: 11/19/2022]
Abstract
The goal of this study was to evaluate the biocompatibility of materials for use in fully bioabsorbable vascular stents. 10:90 poly(L-lactic-co-glycolic acid) (10:90 L-PLGA), 85:15 poly(L-lactic-co-glycolic acid) (85:15 L-PLGA), polydioxanone (PDO), and poly-L-lactic acid (L-PLA) polymers were chosen as materials. Polymeric fibers were woven into a braided structure with a mass equivalent to or greater than that expected for a vascular stent, secured to balloon-expandable bare metal stents and implanted into porcine carotid arteries. The in vivo response was analyzed at 30 and 90 days by angiography, histopathology, and histomorphometry. All vessels were patent at 30 and 90 days. Injury score and neointima formation was mild for all samples. The faster-degrading 10:90 L-PLGA had the highest inflammatory response at 30 days, but was completely absorbed with minimal inflammation and neointimal formation at 90 days. PDO showed signs of partial absorption at 90 days, while 85:15 L-PLGA and L-PLA demonstrated minimal absorption at 30 and 90 days. The inflammatory response to these three groups was similar over the experimental period. Using a robust materials-testing platform, we demonstrated long-term patency and intravascular biocompatibility of bioabsorbable polymers with varying rates of resorption. The data point to biocompatibility of a polymeric stent in the vascular space that is fully absorbable in less than a year.
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Affiliation(s)
- P Zamiri
- Arsenal Medical, Inc., 480 Arsenal Street, Watertown, MA 02472, USA.
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89
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Gu J, Yang W, Cheng J, Yang T, Qu Y, Kuang Y, Huang H, Yang L, He W, Min L. Temporal and spatial characteristics and treatment strategies of traumatic brain injury in Wenchuan earthquake. Emerg Med J 2010; 27:216-9. [DOI: 10.1136/emj.2008.065342] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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90
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Sun F, Wen D, Kuang Y, Li J, Li J, Zuo W. Concentrations of heavy metals and polycyclic aromatic hydrocarbons in needles of Masson pine (Pinus massoniana L.) growing nearby different industrial sources. J Environ Sci (China) 2010; 22:1006-13. [PMID: 21174990 DOI: 10.1016/s1001-0742(09)60211-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Emissions from industrial activities pose a serious threat to human health and impose the need for monitoring both inorganic and organic pollutants in industrial areas. We selected Masson pine (Pinus massoniana L.) as potential biomonitor and collected the current (C) and previous year (C+1) needles from three industrial sites dominated by petrochemical, ceramics manufacturing, and iron and steel smelting plants and one remote site to determine heavy metals (Cu, Cd, Pb, Zn, Cr, Ni and Co) and polycyclic aromatic hydrocarbons (PAHs) in unwashed and water-washed needles. Both unwashed and washed C+1 needles showed generally higher concentrations of heavy metals and PAHs than C needles, although the washed needles more clearly spotlighted the accumulation effect of PAHs over exposure time. Water-washing resulted in a significant decrease in needle PAH concentrations with more significant effects shown in C needles. By contrast, needle heavy metal concentrations were much less affected by washing. Although heavy metals and PAHs might differ in adsorption and uptake strategies, their higher concentrations in the needles at the industrial sites indicated conspicuous contamination due to industrial emissions there. The PAH distribution patterns in pine needles accorded with the real types of energy consumption in the study sites and were efficiently used for pinpointing local pollutant sources.
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Affiliation(s)
- Fangfang Sun
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
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91
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Kuang Y, Ma C, Dong C, Zeng Z. UP-1.147: Clinical Report of 45 Living Related Donor Kidneys Transplantation. Urology 2009. [DOI: 10.1016/j.urology.2009.07.594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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92
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Eikenberry SE, Sankar T, Preul MC, Kostelich EJ, Thalhauser CJ, Kuang Y. Virtual glioblastoma: growth, migration and treatment in a three-dimensional mathematical model. Cell Prolif 2009; 42:511-28. [PMID: 19489983 DOI: 10.1111/j.1365-2184.2009.00613.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVES Glioblastomas are aggressive primary brain cancers that are characterized by extensive infiltration into the brain and are highly resistant to treatment. Through mathematical modelling, we model the process of invasion and predict the relative importance of mechanisms contributing to malignant invasion. Clinically, we predict patterns of tumour recurrence following various modes of therapeutic intervention. MATERIALS AND METHODS Our mathematical model uses a realistic three-dimensional brain geometry and considers migrating and proliferating cells as separate classes. Several mechanisms for infiltrative migration are considered. Methods are developed for simulating surgical resection, radiotherapy and chemotherapy. RESULTS The model provides clinically realistic predictions of tumour growth and recurrence following therapeutic intervention. Specific results include (i) invasiveness is governed largely by the ability of glioblastoma cells to degrade and migrate through the extracellular matrix and the ability of single migrating cells to form colonies; (ii) tumours originating deeper in the brain generally grow more quickly than those of superficial origin; (iii) upon surgery, the margins and geometry of resection significantly determine the extent and pattern of postoperative recurrence; (iv) radiotherapy works synergistically with greater resection margins to reduce recurrence; (v) simulations in both two- and three-dimensional geometries give qualitatively similar results; and (vi) in an actual clinical case comprising several surgical interventions, the model provides good qualitative agreement between the simulated and observed course of the disease. CONCLUSIONS The model provides a useful initial framework by which biological mechanisms of invasion and efficacy of potential treatment regimens may be assessed.
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Affiliation(s)
- S E Eikenberry
- Department of Mathematics and Statistics, Arizona State University, Tempe, AZ 85287, USA.
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93
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Salem N, Kuang Y, Wang F, Maclennan GT, Lee Z. PET imaging of hepatocellular carcinoma with 2-deoxy-2[18F]fluoro-D-glucose, 6-deoxy-6[18F] fluoro-D-glucose, [1-11C]-acetate and [N-methyl-11C]-choline. Q J Nucl Med Mol Imaging 2009; 53:144-156. [PMID: 19039303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
AIM This study was designed to investigate the performance of positron emission tomography (PET) imaging for hepatocellular carcinoma (HCC) on a hepatitis viral infection-induced woodchuck model using existing tracers such as 2-deoxy-2[(18)F]fluoro-D-glucose (2FDG), 6-deoxy-6[(18)F]fluoro-D-glucose (6FDG), [1(-11)C]acetate (acetate) and [N-methyl(-11)C]choline (choline). METHODS Fourteen woodchucks with HCC were imaged with different radiotracers: 13 (10 with HCC and 3 controls) with 2FDG; 4 (3 with HCC and 1 control) with 6FDG; 13 (10 with HCC and 3 controls) with acetate; 4 (2 with HCC and 2 controls) with choline. The woodchucks were euthanized after imaging experiments and liver tissues were harvested for histology, for enzymatic activities including hexokinase (HK), glucose-6-phosphatase, acetyl-CoA synthetase (ACAS) and choline kinase (CK), and for differential gene expressions between the HCCs and the surrounding hepatic tissues. RESULTS 2FDG detected 7/13 tumors with a tumor-to-liver uptake ratio (T/L) of 1.36+/-0.13. Five of these HCCs were moderately- or poorly-differentiated. The HK/glucose-6-phosphatase ratio was significantly higher in HCCs compared to the surrounding liver tissues (P=0.05). None of the HCCs imaged with 6FDG were detected by PET (T/L=1.01+/-0.11). Acetate detected 16/17 HCCs (T/L=2.02+/-0.7). ACAS activity was significantly higher in HCCs (P=0.01) and lipids-related genes were found up-regulated. Choline imaging detected all HCCs (T/L=1.63+/-0.34). CK activity was significantly higher in HCCs (P=0.001). CONCLUSIONS Well-differentiated and some moderately-differentiated HCCs do not uptake 2FDG more than the surrounding liver tissues, but display increased acetate uptake. There is no contrast between HCCs and the surrounding liver tissues on the 6FDG PET images. Despite elevated background signal from the liver, choline uptake seems to be detectable in the HCCs scanned in this study.
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Affiliation(s)
- N Salem
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH,USA
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94
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Holmes A, Joshi VA, Kuang Y, Rogers A, Jänne PA. Comparison of genotyping with direct sequencing as a method to detect EGFR mutations in NSCLC. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.22013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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95
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Borras AM, Rogers A, Kuang Y, Flores L, Distel R, Krop IE. Identification of novel HER2 splice variants in breast cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.22010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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96
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Kuang Y, Rogers A, Wang L, Makrigiorgos M, Vetrand K, Thiede S, Distel R, Janne PA. Non-invasive detection of EGFR T790M in gefitinib/erlotinib resistant NSCLC. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.8075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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97
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Borras AM, Kuang Y, Rogers AM, Holmes AJ, Gallegos Ruiz M, Joshi VA, Distel RJ, Giaccone G, Taron M, Janne PA. Detection of clinically significant mutations in the epidermal growth factor receptor missed by direct sequencing using a highly sensitive DNA endonuclease. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.10054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
10054 Background: Mutations in the epidermal growth factor receptor (EGFR) are associated with sensitivity and resistance to EGFR inhibitors gefitinib and erlotinib in patients with non-small cell lung carcinoma (NSCLC). Direct sequencing is currently used for mutation detection but sensitivity is limited and requires dissection to obtain a relatively pure population of tumor cells. We examined a DNA endonuclease, SURVEYOR, which cleaves mismatched heteroduplexed DNA, as a more sensitive method for EGFR mutation screening and compared it to direct sequencing. Methods: EGFR exons 18–21 from tumor DNA were amplified using PCR, digested with SURVEYOR, and the products analyzed by HPLC. Specimens that produced digestion products were re-analyzed by size separation or by denaturing HPLC followed by fractionation and sequencing. Tumor specimens from 191 NSCLC patients were analyzed: 61 frozen tumors specimens; 91 dissected formalin fixed paraffin embedded (FFPE) and 39 un-dissected FFPE tumor specimens from patients treated with gefitinib or erlotinib in whom clinical outcome was available. 173 specimens were independently analyzed by direct sequencing. Results: We detected 48 EGFR mutations by sequencing and 61 using SURVEYOR. All EGFR mutations identified by sequencing, including those using un-dissected tumor specimens, were detected by SURVEYOR and none were missed (sensitivity: 100%, negative predictive value: 100%). 13 mutations were detected by SURVEYOR not detected by sequencing. This included 5 mutations (4 exon 19 deletions; 1 L858R) in 7 (71%) patients who clinically had a PR to gefitinib or erlotinib but who were wild type by sequencing. In 4 patients, 2 with clinical acquired resistance to gefitinib, a T790M mutation was found which was undetected by sequencing. Conclusions: SURVEYOR analysis is a more sensitive method for EGFR mutation detection than direct sequencing. It can be used to detect EGFR mutations from un-dissected tumor specimens and can detect clinically significant activating or resistance associated EGFR mutations not detected by direct sequencing. [Table: see text]
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Affiliation(s)
- A. M. Borras
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - Y. Kuang
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - A. M. Rogers
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - A. J. Holmes
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - M. Gallegos Ruiz
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - V. A. Joshi
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - R. J. Distel
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - G. Giaccone
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - M. Taron
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
| | - P. A. Janne
- Dana-Farber Cancer Institute, Boston, MA; Vrije Universiteit Medical Center, Amsterdam, The Netherlands; Brigham and Women’s Hospital, Boston, MA; Hospital Germans Trias i Pujol, Barcelona, Spain
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Abstract
The present work investigated the use of a simple rumen-fluid-inoculated anaerobic treatment system for the degradation of organic waste. Fresh rumen fluid collected from a fistulated sheep was used as the inoculum and fresh grass clippings were used as the waste material for treatment. Studies were carried out on both a one-stage system where the ligno-cellulosic fraction breaks down into a mixture of soluble products including volatile fatty acids and a two- stage system where these products are subsequently mineralised to biogas. In the one stage system about 70% of the organic waste was solubilized and in the two stage system about 60% waste material was solubilized in a week. About 50% of the degradation was achieved in a 4 day period, showing that a 4 day solids retention time would be a suitable operating regime. The maximum volatile fatty acid production rate was 327 mg COD l(-1) h(-1). A higher loading rate of 30 g l(-1) d(-1) was achieved in these systems compared to anaerobic digesters. Microbiological studies showed an increase in the number of fungal spores as well as a decrease in the number of protozoa in the treatment system. These numbers attained stable values over the duration of the experiments. The system developed is superior to conventional composting or anaerobic digestion and can be applied for the treatment of ligno-cellulosic agricultural residues.
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Affiliation(s)
- S Nair
- School of Environmental Science, Murdoch University, Perth, WA 6150, Australia
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Niyazov RA, Weinstein LB, Adams G, Ambrozewicz P, Anciant E, Anghinolfi M, Asavapibhop B, Asryan G, Audit G, Auger T, Avakian H, Bagdasaryan H, Ball JP, Barrow S, Battaglieri M, Beard K, Bektasoglu M, Bellis M, Benmouna N, Berman BL, Bertozzi W, Bianchi N, Biselli AS, Boiarinov S, Bonner BE, Bouchigny S, Bradford R, Branford D, Brooks WK, Burkert VD, Butuceanu C, Calarco JR, Carman DS, Carnahan B, Cetina C, Chen S, Ciciani L, Cole PL, Coleman A, Cords D, Corvisiero P, Crabb D, Crannell H, Cummings JP, De Sanctis E, Dashyan N, DeVita R, Degtyarenko PV, Denizli H, Dennis L, Dharmawardane KV, Dhuga KS, Djalali C, Dodge GE, Doughty D, Dragovitsch P, Dugger M, Dytman S, Dzyubak OP, Eckhause M, Egiyan H, Egiyan KS, Elouadrhiri L, Empl A, Eugenio P, Fatemi R, Feuerbach RJ, Ficenec J, Forest TA, Funsten H, Gavalian G, Gilad S, Gilfoyle GP, Giovanetti KL, Girard P, Gordon CIO, Gothe RW, Griffioen K, Guidal M, Guillo M, Guo L, Gyurjyan V, Hadjidakis C, Hakobyan RS, Hardie J, Heddle D, Hersman FW, Hicks K, Holtrop M, Hu J, Hyde-Wright CE, Ilieva Y, Ingram W, Ito MM, Jenkins D, Joo K, Juengst HG, Kelley JH, Kellie J, Khandaker M, Kim DH, Kim KY, Kim K, Kim MS, Kim W, Klein A, Klein FJ, Klimenko AV, Klusman M, Kossov M, Kramer LH, Kuang Y, Kuhn SE, Kuhn J, Lachniet J, Laget JM, Langheinrich J, Lawrence D, Li J, Livingston K, Lukashin K, Manak JJ, Marchand C, McAleer S, McLauchlan S, McNabb JWC, Mecking BA, Mehrabyan S, Melone JJ, Mestayer MD, Meyer CA, Mikhailov K, Mirazita M, Miskimen R, Morand L, Morrow SA, Muccifora V, Mueller J, Mutchler GS, Napolitano J, Nasseripour R, Nelson SO, Niccolai S, Niculescu G, Niculescu I, Niczyporuk BB, Nozar M, O'Rielly GV, Osipenko M, Park K, Pasyuk E, Peterson G, Philips SA, Pivnyuk N, Pocanic D, Pogorelko O, Polli E, Pozdniakov S, Preedom BM, Price JW, Prok Y, Protopopescu D, Qin LM, Raue BA, Riccardi G, Ricco G, Ripani M, Ritchie BG, Ronchetti F, Rossi P, Rowntree D, Rubin PD, Sabatié F, Sabourov K, Salgado C, Santoro JP, Sapunenko V, Schumacher RA, Serov VS, Shafi A, Sharabian YG, Shaw J, Simionatto S, Skabelin AV, Smith ES, Smith LC, Sober DI, Spraker M, Stavinsky A, Stepanyan S, Stoler P, Strakovsky II, Strauch S, Taiuti M, Taylor S, Tedeschi DJ, Thoma U, Thompson R, Todor L, Tur C, Ungaro M, Vineyard MF, Vlassov AV, Wang K, Weller H, Weygand DP, Whisnant CS, Wolin E, Wood MH, Yegneswaran A, Yun J, Zhang B. Two-nucleon momentum distributions measured in 3He(e,e'pp)n. Phys Rev Lett 2004; 92:052303. [PMID: 14995301 DOI: 10.1103/physrevlett.92.052303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2003] [Indexed: 05/24/2023]
Abstract
We have measured the 3He(e,e'pp)n reaction at 2.2 GeV over a wide kinematic range. The kinetic energy distribution for "fast" nucleons (p>250 MeV/c) peaks where two nucleons each have 20% or less, and the third nucleon has most of the transferred energy. These fast pp and pn pairs are back to back with little momentum along the three-momentum transfer, indicating that they are spectators. Calculations by Sargsian and by Laget also indicate that we have measured distorted two-nucleon momentum distributions by striking one nucleon and detecting the spectator correlated pair.
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Affiliation(s)
- R A Niyazov
- Old Dominion University, Norfolk, Virginia 23529, USA
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Wen D, Kuang Y, Zhou G. Sensitivity analyses of woody species exposed to air pollution based on ecophysiological measurements. Environ Sci Pollut Res Int 2004; 11:165-170. [PMID: 15259699 DOI: 10.1007/bf02979671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
GOAL, SCOPE AND BACKGROUND Air pollution has been of a major problem in the Pearl River Delta of south China, particularly during the last two decades. Emissions of air pollutants from industries have already led to damages in natural communities and environments in a wide range of the Delta area. Leaf parameters such as chlorophyll fluorescence, leaf area (LA), dry weight (DW) and leaf mass per area (LMA) had once been used as specific indexes of environmental stress. This study aims to determine in situ if the daily variation of chlorophyll fluorescence and other ecophysiological parameters in five seedlings of three woody species, Ilex rotunda, Ficus microcarpa and Machilus chinensis, could be used alone or in combination with other measurements for sensitivity indexes to make diagnoses under air pollution stress and, hence, to choose the correct tree species for urban afforestation in the Delta area. METHODS Five seedlings of each species were transplanted in pot containers after their acclimation under shadowing conditions. Chlorophyll fluorescence measurements were made in situ by a portable fluorometer (OS-30, Opti-sciences, U.S.A). Ten random samples of leaves were picked from each species for LA measurements by area-meter (CI-203, CID, Inc., U.S.A). DW was determined after the leaf samples were dried to a constant weight at 65 degrees C. LMA was calculated as the ratio of DW/LA. Leaf N content was analyzed according to the Kjeldhal method, and the extraction of pigments was carried out according Lin et al. RESULTS AND DISCUSSION The daily mean Fv/Fm (Fv is the variable fluorescence and Fm is the maximum fluorescence) analysis showed that Ilex rotunda and Ficus microcarpa were more highly resistant to pollution stress, followed by Machilus chinensis, implying that the efficiency of photosystem II in I. rotunda was less affected by air pollutants than the other two species. Little difference in daily change of Fv/Fm in I. rotunda between the polluted and the clean site was also observed. However, a relatively large variation of Fv/Fm appeared in the other two species, particularly in M. chinensis, suggesting that they were more sensitive to air pollutants than I. rotunda. The mean LA was reduced for all species growing at the polluted site. The mean LMA for all species exceeded the sclerophylly threshold given by Cowling and Campbell and increased for those under pollution stress, which could be explained as one of the acclimation strategies for plants to air pollution stress. Little difference in leaf chlorophyll content was observed in F. microcarpa and M. chinensis, while remarkable differences were found in I. rotunda growing at the polluted and the clean site. Content of leaf carotenoids was largely reduced in I. rotunda growing at the polluted site, but increased in F. microcarpa and M. chinensis, compared with plants growing at the clean site. Plants growing at the clean site had a lower leaf N content than those growing at the polluted site. In addition, species with a higher resistance to pollution stress showed less difference in leaf N content than those sensitive species. CONCLUSION Based on Fv/Fm measurements of the three woody species, I. rotunda showed the highest resistance to air pollutants from ceramic industries, followed by F. microcarpa. M. chinensis was the most sensitive species to air pollution, had lowest capacities to cope with the air pollution stress, which was consistent with visual injury symptoms observed in the crown profiles of plants at the polluted site. Fv/Fm, LAM, LA, leaf pigments and N content could be used alone or in combination to diagnose the extent of the physiological injury. The ratio of Fv/Fm, however, was the best and most effective parameter. RECOMMENDATION AND OUTLOOK Tree species which have higher air-pollutant resistance, as diagnosed by such ecophysiological parameters, should be considered first and planted widely for urban afforestation or forest regeneration in areas where the forest was seriously degraded or forest health was markedly effected by the same kind of air pollutants.
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Affiliation(s)
- Dazhi Wen
- South China Institute of Botany, the Chinese Academy of Sciences, Guangzhou 510650, China.
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