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Abstract
In order to explore the mechanism of gefitinib-acquired resistance in lung cancer, a new biomarker has been developed for early clinical diagnosis and intervention; human NSCLC (Non-Small Cell Lung Cancer) cell lines H292 (denoted as H292S) and PC9 (denoted as PC9S) were used to establish gefitinib-resistant NSCLC cell lines H292 and PC9 models. CCK-8 (Cell Counting Kit-8) method was used to test the drug resistance of the cells. circRNAs (circular RNAs) that were differentially expressed before and after resistance were screened by RNA sequencing technology. The effects of circSETD3 overexpression and interference on the sensitivity of gefitinib was observed to analyze the nuclear localization of circSETD3 and verify the interaction between circSETD3-miR-520h-ABCG2. The results showed that the most significant change in differential expression of human NSCLC cell lines before and after drug resistance was hsa_circ_0000567, that is, circSETD3, which is mainly present in the cytoplasm. In H292S and PC9S, compared with the negative control group, the cell proliferation ability of the overexpression group was significantly increased, and the apoptosis ability was significantly decreased. In H292R and PC9R, compared with the negative control group, the proliferation ability of the interference group was significantly decreased, and the apoptosis ability was significantly increased. Overexpression of circSETD3 to H292S and PC9S, the expression of ABCG2 increased significantly. Also, the expression of ABCG2 decreased significantly after transfection with miR-520h mimics. H292R and PC9R interfered with circSETD3, the expression of ABCG2 decreased significantly. Moreover, the expression of ABCG2 increased significantly after transfection with miR-520h inhibitor. In conclusion, circSETD3 can be used as a novel biomarker for lung cancer. It relieves miR-520h degradation of the transporter ABCG2 by down-regulating the miR-520h expression, causing gefitinib to be pumped out of the cell.
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Affiliation(s)
- F Tao
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - C Gu
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - N Li
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Y Ying
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - L F Cao
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Q F Xiao
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - D Ni
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Y B Zhuang
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Q Zhang
- Department of Respiratory Medicine, The Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
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Liu X, Guan J, Tao F, Mao B. Acupuncture Zusanli Regulate COPD Inflammation Through Dopamine D2 Receptor. C31. COPD BASIC MECHANISMS 2020. [DOI: 10.1164/ajrccm-conference.2020.201.1_meetingabstracts.a4755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- X. Liu
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Chengdu, China
| | - J. Guan
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Chengdu, China
| | - F. Tao
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Chengdu, China
| | - B. Mao
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Chengdu, China
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Chen Z, Xiong H, Li JX, Li H, Tao F, Yang YT, Wu B, Tang W, Teng JX, Fu Q, Yang L. [COVID-19 with post-chemotherapy agranulocytosis in childhood acute leukemia: a case report]. Zhonghua Xue Ye Xue Za Zhi 2020; 41:341-343. [PMID: 32149486 PMCID: PMC7364917 DOI: 10.3760/cma.j.issn.0253-2727.2020.0004] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Z Chen
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - H Xiong
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - J X Li
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - H Li
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - F Tao
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - Y T Yang
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - B Wu
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - W Tang
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - J X Teng
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - Q Fu
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - L Yang
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
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Rodríguez A, Ruiz-Ramos M, Palosuo T, Carter T, Fronzek S, Lorite I, Ferrise R, Pirttioja N, Bindi M, Baranowski P, Buis S, Cammarano D, Chen Y, Dumont B, Ewert F, Gaiser T, Hlavinka P, Hoffmann H, Höhn J, Jurecka F, Kersebaum K, Krzyszczak J, Lana M, Mechiche-Alami A, Minet J, Montesino M, Nendel C, Porter J, Ruget F, Semenov M, Steinmetz Z, Stratonovitch P, Supit I, Tao F, Trnka M, de Wit A, Rötter R. Implications of crop model ensemble size and composition for estimates of adaptation effects and agreement of recommendations. Agric For Meteorol 2019; 264:351-362. [PMID: 31007324 PMCID: PMC6472678 DOI: 10.1016/j.agrformet.2018.09.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 09/19/2018] [Accepted: 09/22/2018] [Indexed: 06/09/2023]
Abstract
Climate change is expected to severely affect cropping systems and food production in many parts of the world unless local adaptation can ameliorate these impacts. Ensembles of crop simulation models can be useful tools for assessing if proposed adaptation options are capable of achieving target yields, whilst also quantifying the share of uncertainty in the simulated crop impact resulting from the crop models themselves. Although some studies have analysed the influence of ensemble size on model outcomes, the effect of ensemble composition has not yet been properly appraised. Moreover, results and derived recommendations typically rely on averaged ensemble simulation results without accounting sufficiently for the spread of model outcomes. Therefore, we developed an Ensemble Outcome Agreement (EOA) index, which analyses the effect of changes in composition and size of a multi-model ensemble (MME) to evaluate the level of agreement between MME outcomes with respect to a given hypothesis (e.g. that adaptation measures result in positive crop responses). We analysed the recommendations of a previous study performed with an ensemble of 17 crop models and testing 54 adaptation options for rainfed winter wheat (Triticum aestivum L.) at Lleida (NE Spain) under perturbed conditions of temperature, precipitation and atmospheric CO2 concentration. Our results confirmed that most adaptations recommended in the previous study have a positive effect. However, we also showed that some options did not remain recommendable in specific conditions if different ensembles were considered. Using EOA, we were able to identify the adaptation options for which there is high confidence in their effectiveness at enhancing yields, even under severe climate perturbations. These include substituting spring wheat for winter wheat combined with earlier sowing dates and standard or longer duration cultivars, or introducing supplementary irrigation, the latter increasing EOA values in all cases. There is low confidence in recovering yields to baseline levels, although this target could be attained for some adaptation options under moderate climate perturbations. Recommendations derived from such robust results may provide crucial information for stakeholders seeking to implement adaptation measures.
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Affiliation(s)
- A. Rodríguez
- CEIGRAM, Universidad Politécnica de Madrid, 28040, Madrid, Spain
- Universidad de Castilla-La Mancha, Department of Economic Analysis and Finances, 45071, Toledo, Spain
| | - M. Ruiz-Ramos
- CEIGRAM, Universidad Politécnica de Madrid, 28040, Madrid, Spain
| | - T. Palosuo
- Natural Resources Institute Finland (Luke), 00790, Helsinki, Finland
| | - T.R. Carter
- Finnish Environment Institute (SYKE), 00251, Helsinki, Finland
| | - S. Fronzek
- Finnish Environment Institute (SYKE), 00251, Helsinki, Finland
| | - I.J. Lorite
- IFAPA Junta de Andalucía, 14004, Córdoba, Spain
| | - R. Ferrise
- University of Florence, 50144, Florence, Italy
| | - N. Pirttioja
- Finnish Environment Institute (SYKE), 00251, Helsinki, Finland
| | - M. Bindi
- University of Florence, 50144, Florence, Italy
| | - P. Baranowski
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
| | - S. Buis
- INRA, UMR 1114 EMMAH, F-84914, Avignon, France
| | - D. Cammarano
- James Hutton Institute, Invergowrie, Dundee, DD2 5DA, Scotland, UK
| | - Y. Chen
- Natural Resources Institute Finland (Luke), 00790, Helsinki, Finland
| | - B. Dumont
- Dpt. AgroBioChem& Terra, Crop Science Unit, ULgGembloux Agro-Bio Tech, 5030, Gembloux, Belgium
| | - F. Ewert
- INRES, University of Bonn, 53115, Bonn, Germany
| | - T. Gaiser
- INRES, University of Bonn, 53115, Bonn, Germany
| | - P. Hlavinka
- Institute of Agrosystems and Bioclimatology, Mendel University in Brno, Brno, 613 00, Czech Republic
- Global Change Research Institute of the Czech Academy of Sciences, 603 00, Brno, Czech Republic
| | - H. Hoffmann
- INRES, University of Bonn, 53115, Bonn, Germany
| | - J.G. Höhn
- Natural Resources Institute Finland (Luke), 00790, Helsinki, Finland
| | - F. Jurecka
- Institute of Agrosystems and Bioclimatology, Mendel University in Brno, Brno, 613 00, Czech Republic
- Global Change Research Institute of the Czech Academy of Sciences, 603 00, Brno, Czech Republic
| | - K.C. Kersebaum
- Leibniz Centre for Agricultural Landscape Research (ZALF), 15374, Müncheberg, Germany
| | - J. Krzyszczak
- Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
| | - M. Lana
- Leibniz Centre for Agricultural Landscape Research (ZALF), 15374, Müncheberg, Germany
- Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Ulls väg 16, 75007, Uppsala, Sweden
| | - A. Mechiche-Alami
- Department of Physical Geography and Ecosystem Science, Lund University, 223 62, Lund, Sweden
| | - J. Minet
- Université de Liège, Arlon Campus Environnement, 6700, Arlon, Belgium
| | - M. Montesino
- University of Copenhagen, 2630, Taastrup, Denmark
| | - C. Nendel
- Leibniz Centre for Agricultural Landscape Research (ZALF), 15374, Müncheberg, Germany
| | - J.R. Porter
- University of Copenhagen, 2630, Taastrup, Denmark
| | - F. Ruget
- INRA, UMR 1114 EMMAH, F-84914, Avignon, France
| | - M.A. Semenov
- Rothamsted Research, Herts, Harpenden, AL5 2JQ, UK
| | | | | | - I. Supit
- Wageningen University, 6700AA, Wageningen, the Netherlands
| | - F. Tao
- Natural Resources Institute Finland (Luke), 00790, Helsinki, Finland
| | - M. Trnka
- Institute of Agrosystems and Bioclimatology, Mendel University in Brno, Brno, 613 00, Czech Republic
- Global Change Research Institute of the Czech Academy of Sciences, 603 00, Brno, Czech Republic
| | - A. de Wit
- Wageningen University, 6700AA, Wageningen, the Netherlands
| | - R.P. Rötter
- TROPAGS, Department of Crop Sciences, Georg-August-Universität Göttingen, Grisebachstr. 6, 37077, Göttingen, Germany
- Centre for Biodiversity and Land Use (CBL), Georg-August-Universität Göttingen, Büsgenweg 1, 37077, Göttingen, Germany
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Ye MF, Xu GG, Gu JF, Zhou QL, Lin FQ, Tao KL, Tao F. Safety and efficacy evaluation of laparoscopy in colorectal cancer with liver metastasis. Eur Rev Med Pharmacol Sci 2017; 21:27-32. [PMID: 28745796] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To study the safety and efficacy of simultaneous completion of colorectal cancer resection and liver metastasis resection by total laparoscopy. PATIENTS AND METHODS In the observation group, 40 patients with colorectal cancer combined with liver metastasis (CRCLM) were selected to receive total laparoscopic surgery. At the same time, 40 cases were selected for laparoscopic resection of colorectal cancer and hepatic resection as control group. RESULTS The outcomes of the two methods in the treatment of CRCLM were compared. The results showed that the difference in surgery time between the two groups was not statistically significant (p>0.05). The blood loss, drainage tube retention time and anal exhaust recovery time in the observation group were significantly less than those in control group (p<0.05). No significant difference in completion rate was found between the two groups (p>0.05); the prevalence rate of complications in the observation group was significantly lower than that in control group (p<0.05). No significant differences in the median survival period and the survival rate at 1 year, 2 years and 3 years after surgery were found between the two groups (p>0.05). CONCLUSIONS The outcomes of total laparoscopy in the treatment of CRCLM are not inferior to open surgery.
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Affiliation(s)
- M-F Ye
- Department of Gastrointestinal Surgery, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang Province, China.
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Zhu X, Huang ZC, Feng X, Tao F. [Assessment and surgical treatment for 58 substernal goiter]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:228-230. [PMID: 28395497 DOI: 10.3760/cma.j.issn.1673-0860.2017.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the diagnosis and treatment of substernal goiter. Methods: A total of 58 cases with substernal goiters undergoing surgery between January 2005 and December 2015 were analysed retrospectively. There were 10 males and 48 females and their age ranged from 38 to 82 years with a median age of 58 years. According to enhanced CT and clinical signs of substernal goiters, there were 40 cases for typeⅠ, 17 cases for type Ⅱ, and 1 case for type Ⅲ. Results: Patients with typeⅠand Ⅱ substernal goiters (8 cases of papillary carcinoma) underwent low neck and collar-type incision, and patients with type Ⅲ substernal goiters received carotid chest surgery. The use of harmonic scalpel in sternal goiter surgery provided with clearer surgical field, less bleeding. All the operations were successful, and recurrent laryngeal nerve was visually identified in all patients. Postoperative complications included trachyphonia (2 cases), without difficult breathing and tracheal stenosis. Conclusions: Enhanced CT is the best means of preoperatively assessment of substernal goiter. It is feasible to treat patients with typeⅠand Ⅱ substernal goiters by lower neck and collar-type incision. Use of harmonic scalpel in substernal goiter surgery can reduce operation time and bleeding.
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Affiliation(s)
- X Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, Zhongda Hospital, Southeast University, Nanjing 210009, China
| | - Z C Huang
- Department of Otorhinolaryngology Head and Neck Surgery, Zhongda Hospital, Southeast University, Nanjing 210009, China
| | - X Feng
- Department of Otorhinolaryngology Head and Neck Surgery, Zhongda Hospital, Southeast University, Nanjing 210009, China
| | - F Tao
- Department of Otorhinolaryngology Head and Neck Surgery, Zhongda Hospital, Southeast University, Nanjing 210009, China
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Niu N, Zhang J, Zhang N, Mercado-Uribe I, Tao F, Han Z, Pathak S, Multani AS, Kuang J, Yao J, Bast RC, Sood AK, Hung MC, Liu J. Linking genomic reorganization to tumor initiation via the giant cell cycle. Oncogenesis 2016; 5:e281. [PMID: 27991913 PMCID: PMC5177773 DOI: 10.1038/oncsis.2016.75] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [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: 07/18/2016] [Revised: 10/19/2016] [Accepted: 10/23/2016] [Indexed: 12/20/2022] Open
Abstract
To investigate the mechanisms underlying our recent paradoxical finding that mitotically incapacitated and genomically unstable polyploid giant cancer cells (PGCCs) are capable of tumor initiation, we labeled ovarian cancer cells with α-tubulin fused to green fluorescent protein, histone-2B fused to red fluorescent protein and FUCCI (fluorescent ubiquitination cell cycle indicator), and tracked the spatial and time-dependent change in spindle and chromosomal dynamics of PGCCs using live-cell fluorescence time-lapse recording. We found that single-dose (500 nm) treatment with paclitaxel paradoxically initiated endoreplication to form PGCCs after massive cell death. The resulting PGCCs continued self-renewal via endoreplication and further divided by nuclear budding or fragmentation; the small daughter nuclei then acquired cytoplasm, split off from the giant mother cells and acquired competency in mitosis. FUCCI showed that PGCCs divided via truncated endoreplication cell cycle (endocycle or endomitosis). Confocal microscopy showed that PGCCs had pronounced nuclear fragmentation and lacked expression of key mitotic proteins. PGCC-derived daughter cells were capable of long-term proliferation and acquired numerous new genome/chromosome alterations demonstrated by spectral karyotyping. These data prompt us to conceptualize a giant cell cycle composed of four distinct but overlapping phases, initiation, self-renewal, termination and stability. The giant cell cycle may represent a fundamental cellular mechanism to initiate genomic reorganization to generate new tumor-initiating cells in response to chemotherapy-induced stress and contributes to disease relapse.
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Affiliation(s)
- N Niu
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - J Zhang
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - N Zhang
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - I Mercado-Uribe
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - F Tao
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Z Han
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - S Pathak
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - A S Multani
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - J Kuang
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - J Yao
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - R C Bast
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - A K Sood
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M-C Hung
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Center for Molecular Medicine and Graduate Institute of Cancer Biology, China Medical University, Taichung, Taiwan
| | - J Liu
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Abstract
A major challenge of the 21st century is to achieve food supply security under a changing climate and roughly a doubling in food demand by 2050 compared to present, the majority of which needs to be met by the cereals wheat, rice, maize, and barley. Future harvests are expected to be especially threatened through increased frequency and severity of extreme events, such as heat waves and drought, that pose particular challenges to plant breeders and crop scientists. Process-based crop models developed for simulating interactions between genotype, environment, and management are widely applied to assess impacts of environmental change on crop yield potentials, phenology, water use, etc. During the last decades, crop simulation has become important for supporting plant breeding, in particular in designing ideotypes, i.e. 'model plants', for different crops and cultivation environments. In this review we (i) examine the main limitations of crop simulation modelling for supporting ideotype breeding, (ii) describe developments in cultivar traits in response to climate variations, and (iii) present examples of how crop simulation has supported evaluation and design of cereal cultivars for future conditions. An early success story for rice demonstrates the potential of crop simulation modelling for ideotype breeding. Combining conventional crop simulation with new breeding methods and genetic modelling holds promise to accelerate delivery of future cereal cultivars for different environments. Robustness of model-aided ideotype design can further be enhanced through continued improvements of simulation models to better capture effects of extremes and the use of multi-model ensembles.
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Affiliation(s)
- R P Rötter
- Natural Resources Institute Finland (Luke), 00790 Helsinki, Finland
| | - F Tao
- Natural Resources Institute Finland (Luke), 00790 Helsinki, Finland
| | - J G Höhn
- Natural Resources Institute Finland (Luke), 00790 Helsinki, Finland
| | - T Palosuo
- Natural Resources Institute Finland (Luke), 00790 Helsinki, Finland
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Asseng S, Ewert F, Martre P, Rötter RP, Lobell DB, Cammarano D, Kimball BA, Ottman MJ, Wall GW, White JW, Reynolds MP, Alderman PD, Prasad PVV, Aggarwal PK, Anothai J, Basso B, Biernath C, Challinor AJ, De Sanctis G, Doltra J, Fereres E, Garcia-Vila M, Gayler S, Hoogenboom G, Hunt LA, Izaurralde RC, Jabloun M, Jones CD, Kersebaum KC, Koehler AK, Müller C, Naresh Kumar S, Nendel C, O’Leary G, Olesen JE, Palosuo T, Priesack E, Eyshi Rezaei E, Ruane AC, Semenov MA, Shcherbak I, Stöckle C, Stratonovitch P, Streck T, Supit I, Tao F, Thorburn PJ, Waha K, Wang E, Wallach D, Wolf J, Zhao Z, Zhu Y. Rising temperatures reduce global wheat production. Nature Clim Change 2015; 5:143-147. [PMID: 0 DOI: 10.1038/nclimate2470] [Citation(s) in RCA: 528] [Impact Index Per Article: 58.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 11/18/2014] [Indexed: 05/26/2023]
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Li J, Tao F, Wu X, Tan Y, He L, Lu H. Polymorphic variations in manganese superoxide dismutase (MnSOD) and endothelial nitric oxide synthase (eNOS) genes contribute to the development of type 2 diabetes mellitus in the Chinese Han population. Genet Mol Res 2015; 14:12993-3002. [DOI: 10.4238/2015.october.21.20] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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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Wang H, Fu J, Lu Q, Tao F, Hao J. Physical activity, body mass index and mental health in Chinese adolescents: a population based study. J Sports Med Phys Fitness 2014; 54:518-525. [PMID: 25034554] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM The aim of the present study was to examine the association between physical activity, BMI level and mental health among Chinese adolescents. METHODS Three thousand ninety-six adolescents aged 11 to 13 were analyzed from 6 middle schools of Xuzhou. Physical activity level was measured using self-designed questionnaires. BMI was calculated according to the results of these students' physical examinations. Anxiety symptoms were assessed by using the Screen for Child Anxiety Related Emotional Disorder, depression via the Children's Depression Inventory. Data were analyzed using chi-square test and logistic regression. RESULTS Adolescents' self-reported rate of insufficient physical activity was 58.1%. The overweight and obesity rates were 18.4%, 16.0%. The point prevalence rates on anxiety and depression were 15.2%, 11.5%. Insufficient physical activity was positively associated with anxiety and depression (OR [95%CI]: 1.31 [1.06-1.63]; 1.33 [1.04-1.70]). Obesity was positively associated with depression (OR [95%CI]: 1.48 [1.10-2.00]). IS-OB was positively associated with anxiety and depressive (OR [95%CI]: 1.71 [1.19-2.45]; 1.99 [1.33-2.97]). CONCLUSION Physical inactivity and overweight/obesity were negatively association with mental health of adolescents, respectively. Meanwhile, to explore the combined effects of physical inactivity and obesity would increase the risk of anxiety and depression in adolescents.
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Affiliation(s)
- H Wang
- Department of Maternal, Child and Adolescent Health School of Public Health, Anhui Medical University, Hefei, China -
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Asseng S, Ewert F, Rosenzweig C, Jones JW, Hatfield JL, Ruane AC, Boote KJ, Thorburn PJ, Rötter RP, Cammarano D, Brisson N, Basso B, Martre P, Aggarwal PK, Angulo C, Bertuzzi P, Biernath C, Challinor AJ, Doltra J, Gayler S, Goldberg R, Grant R, Heng L, Hooker J, Hunt LA, Ingwersen J, Izaurralde RC, Kersebaum KC, Müller C, Naresh Kumar S, Nendel C, O’Leary G, Olesen JE, Osborne TM, Palosuo T, Priesack E, Ripoche D, Semenov MA, Shcherbak I, Steduto P, Stöckle C, Stratonovitch P, Streck T, Supit I, Tao F, Travasso M, Waha K, Wallach D, White JW, Williams JR, Wolf J. Uncertainty in simulating wheat yields under climate change. Nature Clim Change 2013. [PMID: 0 DOI: 10.1038/nclimate1916] [Citation(s) in RCA: 267] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
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Xiong Y, Gan HJ, Liu T, Tao F, Wang HF, Wu Y. Prenatal diagnosis of crossed pulmonary arteries. Ultrasound Obstet Gynecol 2010; 36:776-777. [PMID: 20812378 DOI: 10.1002/uog.8828] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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Tao F, Dag S, Wang LW, Liu Z, Butcher DR, Bluhm H, Salmeron M, Somorjai GA. Break-Up of Stepped Platinum Catalyst Surfaces by High CO Coverage. Science 2010; 327:850-3. [DOI: 10.1126/science.1182122] [Citation(s) in RCA: 409] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Tao F, Grass ME, Zhang Y, Butcher DR, Renzas JR, Liu Z, Chung JY, Mun BS, Salmeron M, Somorjai GA. Reaction-Driven Restructuring of Rh-Pd and Pt-Pd Core-Shell Nanoparticles. Science 2008; 322:932-4. [DOI: 10.1126/science.1164170] [Citation(s) in RCA: 1019] [Impact Index Per Article: 63.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Abstract
AIMS The potential of a Sinorhizobium fredii strain to produce a copolymer from glucose and sodium dodecanoate substrates was investigated. METHODS AND RESULTS Using an orthogonal design in a flask-shaker culture system, the vital regulation conditions for copolymer synthesis were optimized. These optimal results were applied to further studies in a two-stage fed-batch fermentation with a 10-l fermentor. When the biomass approached 33.5 g l(-1) dry cells at 35 h, 7 mmol l(-1) sodium dodecanoate was added into the broth to trigger the copolymer synthesis. After further culturing for 3 h, the copolymer product could be 17.14 g l(-1). The molecular structure of the copolymer was determined to be a poly (3-hydroxybutyrate-co-3-hydroxyoctanoate) [P (HB-HO)] by nuclear magnetic resonance. The content of HB and HO in P (HB-HO) was 79.2% (w/w) and 20.8% (w/w) respectively. The molecular weight of the P (HB-HO) was measured as 1.85 x 10(5) Da by a viscosity method. CONCLUSION The results demonstrated that the S. fredii strain used could be a potential candidate for the industrial production of the copolymer. SIGNIFICANCE AND IMPACT OF THE STUDY Some basic fermentation parameters were acquired through the fed-batch culturing experiments and they should be applicable in developing large-scale fermentation technologies for producing the P (HB-HO) copolymers.
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Affiliation(s)
- Z Liangqi
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan, China.
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Tao F, Tao YX, Zhao C, Doré S, Liaw WJ, Raja SN, Johns RA. Differential roles of neuronal and endothelial nitric oxide synthases during carrageenan-induced inflammatory hyperalgesia. Neuroscience 2004; 128:421-30. [PMID: 15350652 DOI: 10.1016/j.neuroscience.2004.06.038] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2004] [Indexed: 10/26/2022]
Abstract
The present study investigated the role of neuronal nitric oxide synthase (nNOS) in carrageenan-induced inflammatory pain by combining genomic and pharmacological strategies. Intrathecal injection of the nNOS inhibitor 7-nitroindazole dose-dependently inhibited carrageenan-induced thermal hyperalgesia in both early and late phases in wild-type mice. However in nNOS knockout mice, carrageenan-induced thermal hyperalgesia remained intact in the early phase but was reduced in the late phase. Spinal Ca2+ -dependent nitric oxide synthase (NOS) activity in nNOS knockout mice was significantly lower than that in wild-type mice. Following carrageenan injection, although the spinal Ca2+ -dependent NOS activity in both wild-type and knockout mice increased, the enzyme activity in nNOS knockout mice reached a level similar to that in wild-type mice. On the other hand, no significant difference in spinal Ca2+ -independent NOS activity was noted between wild-type and nNOS knockout mice before and after carrageenan injection. Furthermore, intrathecal administration of the endothelial NOS (eNOS) inhibitor L-N5-(1-iminoethyl)-ornithinein nNOS knockout mice inhibited the thermal hyperalgesia in both early and late phases, though this inhibitor had no effect in wild-type mice. Meanwhile, Western blot showed that eNOS expression in the spinal cord of nNOS knockout mice was up-regulated compared with wild-type mice; immunohistochemical staining showed that the spinal eNOS was mainly distributed in superficial laminae of the dorsal horn. Finally, double staining with confocal analysis showed that the enhanced spinal eNOS was expressed in astrocytes, but not in neurons. Our current results indicate that nNOS plays different roles in the two phases of carrageenan-induced inflammatory pain. In this model, enhanced spinal eNOS appears to compensate for the role of nNOS in nNOS knockout mice.
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Affiliation(s)
- F Tao
- Department of Anesthesiology, Johns Hopkins University School of Medicine, 600 North Wolfe Street/Blalock 1415, Baltimore, MD 21287, USA
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Abstract
L-Cysteic acid and its esters were prepared in good yields from the oxidation of L-cystine by chlorine in water and in alcohols. When the reaction was carried out in alcohols the corresponding esters were produced.
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Affiliation(s)
- F Tao
- Chengdu Institute of Biology, the Chinese Academy of Sciences, Chengdu, P.R. China
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Tao F, Liaw WJ, Zhang B, Yaster M, Rothstein JD, Johns RA, Tao YX. Evidence of neuronal excitatory amino acid carrier 1 expression in rat dorsal root ganglion neurons and their central terminals. Neuroscience 2004; 123:1045-51. [PMID: 14751295 DOI: 10.1016/j.neuroscience.2003.11.026] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The expression and distribution of the neuronal glutamate transporter, excitatory amino acid carrier-1 (EAAC1), are demonstrated in the dorsal root ganglion neurons and their central terminals. Reverse transcriptase-polymerase chain reaction shows expression of EAAC1 mRNA in the dorsal root ganglion. Immunoblotting analysis further confirms existence of EAAC1 protein in this region. Immunocytochemistry reveals that approximately 46.6% of the dorsal root ganglion neurons are EAAC1-positive. Most EAAC1-positive neurons are small and around 250-750 microm2 in surface area, and some co-label with calcitonin gene-related peptide (CGRP) or isolectin IB4. In the spinal cord, EAAC-1 immunoreactive small dot- or patch-like structures are mainly localized in the superficial dorsal horn, and some are positive for CGRP or labeled by isolectin IB4. Unilateral dorsal rhizotomy experiments further show that EAAC1 immunoreactivity is less intense in superficial dorsal horn on the side ipsilateral to the dorsal rhizotomy than on the contralateral side. The results indicate the presence of EAAC1 in the dorsal root ganglion neurons and their central terminals. Our findings suggest that EAAC1 might play an important role in transmission and modulation of nociceptive information via the regulation of pre-synaptically released glutamate.
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Affiliation(s)
- F Tao
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 355 Ross, 720 Rutland Avenue, Baltimore, MD 21205, USA.
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Liaw WJ, Zhang B, Tao F, Yaster M, Johns RA, Tao YX. Knockdown of spinal cord postsynaptic density protein-95 prevents the development of morphine tolerance in rats. Neuroscience 2004; 123:11-5. [PMID: 14667437 DOI: 10.1016/j.neuroscience.2003.09.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The activation of spinal cord N-methyl-D-aspartate (NMDA) receptors and subsequent intracellular cascades play a pivotal role in the development of opioid tolerance. Postsynaptic density protein-95 (PSD-95), a molecular scaffolding protein, assembles a specific set of signaling proteins around NMDA receptors at neuronal synapses. The current study investigated the possible involvement of PSD-95 in the development of opioid tolerance. Opioid tolerance was induced by intrathecal injection of morphine sulfate (20 microg/10 microl) twice a day for 4 consecutive days. Co-administration of morphine twice daily and PSD-95 antisense oligodeoxynucleotide (50 microg/10 microl) once daily for 4 days not only markedly reduced the PSD-95 expression and its binding to NMDA receptors in spinal cord but also significantly prevented the development of morphine tolerance. In contrast, co-administration of morphine twice daily and PSD-95 missense oligodeoxynucleotide (50 microg/10 microl) once daily for 4 days did not produce these effects. The PSD-95 antisense oligodeoxynucleotide at the doses we used did not affect baseline response to noxious thermal stimulation or locomotor function. The present study indicates that the deficiency of spinal cord PSD-95 attenuates the development of opioid tolerance. These results suggest that PSD-95 might be involved in the central mechanisms of opioid tolerance and provide a possible new target for prevention of development of opioid tolerance.
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Affiliation(s)
- W-J Liaw
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 355 Ross, 720 Rutland Avenue, Baltimore, MD 21205, USA
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Tao F, Tao YX, Mao P, Zhao C, Li D, Liaw WJ, Raja SN, Johns RA. Intact carrageenan-induced thermal hyperalgesia in mice lacking inducible nitric oxide synthase. Neuroscience 2003; 120:847-54. [PMID: 12895524 DOI: 10.1016/s0306-4522(03)00362-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
To date, the exact role of inducible nitric oxide synthase (iNOS) in inflammatory pain remains controversial. In the present study, we combined a pharmacological strategy (using a selective iNOS inhibitor) with a genomic strategy (using mice lacking the iNOS gene) to address the function of iNOS in the central mechanism of carrageenan-induced persistent inflammatory pain. In the wild type mice, intrathecal administration of L-N(6)-(1-iminoethyl)-lysine, a selective iNOS inhibitor, significantly inhibited thermal hyperalgesia in the late phase but not in the early phase of carrageenan inflammation. Moreover, iNOS mRNA expression in the lumbar enlargement segments of the spinal cord was dramatically induced at 24 h (late phase) after injection of carrageenan into a hind paw. Interestingly, targeted disruption of iNOS gene did not affect carrageenan-induced thermal hyperalgesia in either the early (2-6 h) or late phase. In the lumbar enlargement segments of iNOS knockout mice, nitric oxide synthase (NOS) enzyme activity remained at a similar level to that of the wild type mice at 24 h after carrageenan injection. We found that intrathecal administration of 7-nitroindazole (a selective neuronal NOS inhibitor), but not L-N(5)-(1-iminoethyl)-ornithine (a selective endothelial NOS inhibitor), significantly reduced carrageenan-induced thermal hyperalgesia in both the early phase and the late phase in iNOS knockout mice. We also found that expression of neuronal NOS but not endothelial NOS in the lumbar enlargement segments was significantly increased in iNOS knockout mice compared with wild type mice at 24 h after carrageenan injection. Our results indicate that neuronal NOS might compensate for the function of iNOS in the late phase of carrageenan-induced inflammatory pain in iNOS knockout mice. This suggests that iNOS may be sufficient, but not essential, for the late phase of the carrageenan-induced thermal hyperalgesia.
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Affiliation(s)
- F Tao
- Department of Anesthesiology and Critical Care Medicine, Blalock 1415, Johns Hopkins University School of Medicine, 600 North Wolfe Street, Baltimore, MD 21287-4965, USA
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Abstract
We have developed a novel cell culture system that supports the shortening of smooth muscle cells. Primary rat airway smooth muscle cells were plated on an ethanol-fixed, confluent monolayer of homologous smooth muscle cells (homologous cell substrate, HCS). Cells grown on HCS exhibited morphological and functional characteristics consistent with a differentiated phenotype. Cells on HCS were spindle shaped with a well-defined long axis, whereas cells grown on glass were larger and irregularly shaped. Smooth muscle-specific alpha-actin immunostained diffusely in cells on HCS, whereas it appeared as stress fibers in cells on glass. Agonists recruited a greater fraction of HCS cells to contract, resulting in greater changes in cell area or length on average, but the maximal capacity of shortening of individual cells was similar between the groups. Unlike cells on glass, cells on HCS shortened to methacholine. HCS was reversible and persisted over several passages. Agonists stimulated intracellular Ca(2+) oscillations in cells on HCS, whereas they elicited biphasic peak and plateau transients in cells on glass. HCS modulates smooth muscle cell phenotype in vitro.
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Affiliation(s)
- F Tao
- Meakins-Christie Laboratories, Department of Medicine, McGill University, Montreal, Quebec, Canada H2X 2P2.
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Abstract
Our previous work has demonstrated that postsynaptic density protein-95, a molecular scaffolding protein that binds and clusters N-methyl-D-aspartate receptors at neuronal synapses, plays an important role in the development of peripheral nerve injury-induced neuropathic pain. The current study further investigated the possible involvement of postsynaptic density protein-95 in the maintenance of neuropathic pain. Mechanical and thermal hyperalgesia were induced within 3 days and maintained for 15 days or longer after unilateral injury to the fifth lumbar spinal nerve. The rats injected intrathecally with postsynaptic density protein-95 antisense oligodeoxynucleotide every 24 h for 4 days from day 7 to day 10 post-surgery exhibited not only a marked decrease in spinal cord postsynaptic density protein-95 protein expression but also a significant reduction in mechanical and thermal hyperalgesia on day 11 post-surgery. The rats injected with sense oligodeoxynucleotide did not display these changes. However, in the rats without nerve injury, postsynaptic density protein-95 antisense oligodeoxynucleotide given intrathecally every 24 h for 4 days did not affect responses to mechanical and thermal stimulation. In addition, postsynaptic density protein-95 antisense oligodeoxynucleotide did not change locomotor activity of experimental animals. Our results indicate that the deficiency of postsynaptic density protein-95 protein in the spinal cord significantly attenuates nerve injury-induced mechanical and thermal hyperalgesia during both the development and maintenance of chronic neuropathic pain. These results suggest that postsynaptic density protein-95 might be involved in the central mechanisms of chronic neuropathic pain and provide a novel target for development of new pain therapies.
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Affiliation(s)
- F Tao
- Department of Anesthesiology and Critical Care Medicine, Blalock 1415, The Johns Hopkins University School of Medicine, 600 North Wolfe Street, Baltimore, MD 21287-4965, USA
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Kindler SD, Elliott NC, Giles KL, Royer TA, Fuentes-Granados R, Tao F. Effect of greenbugs (Homoptera: Aphididae) on yield loss of winter wheat. J Econ Entomol 2002; 95:89-95. [PMID: 11942769 DOI: 10.1603/0022-0493-95.1.89] [Citation(s) in RCA: 2] [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: 05/23/2023]
Abstract
The effect of greenbug, Schizaphis graminum (Rondani), feeding on the yield of four winter wheat cultivars commonly grown in Oklahoma was studied. Cultivars tested were 'Karl', a recent derivative 'Karl-92', and '2163', all greenbug-susceptible cultivars; and 'TAM-110', a cultivar with resistance to biotype E greenbugs. The objectives were to determine the effect of different greenbug densities during fall and spring on yield of winter wheat, and to develop mathematical models to quantify the effect of greenbugs on yield loss. The intensity of greenbug infestations achieved in plots by artificial infestation varied among years and growing seasons within a year, but was generally sufficient to cause a reduction in yield. Among yield components, the number of heads per square meter and the number of seeds per head were frequently negatively correlated with the accumulated number of greenbug-days per tiller. Seed weight was rarely affected by greenbug infestation. A regression model estimated yield loss for greenbug-susceptible cultivars at 0.51 kg/ha loss of yield per greenbug-day in years with near normal precipitation, and a loss of 1.17 kg/ha under severe drought conditions. The susceptible winter wheat cultivars exhibited similar yield loss in relation to the intensity of greenbug infestation, as indicated by a common slope parameter in the regression model. Results suggest that the model is robust for predicting yield loss for susceptible cultivars.
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Affiliation(s)
- S D Kindler
- SPA, Plant Science and Water Conservation Research Laboratory, USDA-ARS, Stillwater, OK 74075, USA
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Abstract
Our previous work has shown that PSD-95/SAP90 is required for NMDA receptor-mediated thermal hyperalgesia. To address the role of PSD-95/SAP90 in chronic pain, the present study investigated the effect of the deficiency of PSD-95/SAP90 on nerve injury-induced neuropathic pain. Following unilateral L5 spinal nerve injury, mechanical and thermal hyperalgesia developed within 3 days and persisted for 9 days or longer on the injured side. The intrathecal administration of antisense oligodeoxynucleotide specifically against PSD-95/SAP90, but not sense or missense oligodeoxynucleotide, dose-dependently delayed the onset of tactile allodynia and thermal hyperalgesia. These results suggest that PSD-95/SAP90 might be involved in the central mechanisms of the development of chronic neuropathic pain.
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Affiliation(s)
- F Tao
- Department of Anesthesiology and Critical Care Medicine, Blalock 1415, Johns Hopkins University School of Medicine, 600 North Wolfe Street, Baltimore, MD 21287-4965, USA
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Abstract
The covalent binding of acrylonitrile (CH(2)=CH-C triple bond N) and the formation of a C=C-C=N structure on Si(100) have been investigated using high-resolution electron energy loss spectroscopy (HREELS), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), and density functional theory (DFT) calculations. For chemisorbed acrylonitrile, the absence of nu(C triple bond N) at 2245 cm(-1) and the appearance of nu(C=N) at 1669 cm(-1) demonstrate that the cyano group directly participates in the interaction with Si(100), which is further supported by XPS and UPS observations. Our experimental results and DFT calculations unambiguously demonstrate a [2 + 2] cycloaddition mechanism for acrylonitrile chemisorption on Si(100) through the binding of C triple bond N to Si dimers. The resulting chemisorbed monolayer with a C=C-C=N skeleton can serve as a precursor for further chemical syntheses of multilayer organic thin films in a vacuum and surface functionalization for in situ device fabrication.
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Affiliation(s)
- F Tao
- Department of Chemistry, National University of Singapore, 10 Kent Ridge, Singapore 119260
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Abstract
The role of excitatory amino acid transporter 1 in neonatal rat neuronal damage was studied following hypoxia-ischemia. To induce hypoxia-ischemia injury, rats on postnatal day 7 were exposed to 8 % oxygen for 2 h following unilateral common carotid artery ligation. According to brain damage scoring based on Cresyl Violet staining, the neuronal damage time-dependently changed in the ischemic regions following hypoxia-ischemia. Immunohistochemical studies showed that excitatory amino acid transporter 1 expression was mainly observed in the cerebral cortex ipsilateral to common carotid artery ligation and markedly increased at 24 h and 48 h following hypoxia-ischemia. Combined with confocal laser scanning microscopic analysis, double staining showed that excitatory amino acid transporter 1 positive staining appeared in neurons as well as astrocytes after hypoxia-ischemia. Most excitatory amino acid transporter 1 positive staining cells exhibited regular morphological characteristics and only a few were double-stained by terminal deoxynucleotidyl transferase-mediated deoxyuridinetriphosphate nick-end labeling. Down-regulation of excitatory amino acid transporter 1 expression by intraventricular administration of specific antisense oligonucleotide exacerbated neuronal damage in hypoxia-ischemia brain. These results suggest that the increase of excitatory amino acid transporter 1 expression may be involved in a pathophysiological process of hypoxia-ischemia brain damage and may reflect a self-compensative mechanism for protecting neurons from further injury.
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Affiliation(s)
- F Tao
- National Key Laboratory of Medical Neurobiology, Medical Center of Fudan University, 200032, Shanghai, People's Republic of China
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Affiliation(s)
- M. H. Qiao
- Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore, and Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China
| | - Y. Cao
- Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore, and Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China
| | - F. Tao
- Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore, and Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China
| | - Q. Liu
- Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore, and Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China
| | - J. F. Deng
- Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore, and Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China
| | - G. Q. Xu
- Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore, and Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China
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Abstract
BACKGROUND Hydrostatic-pressure virus inactivation is a novel approach to the inactivation of pathogens in plasma and blood-derived components, that retains the therapeutic properties of these products. STUDY DESIGN AND METHODS A custom-built apparatus was used to pressurize human plasma samples spiked with lambda phage. Phage titer and plasma protein activities were monitored after pressure treatment. RESULTS Pressure-mediated inactivation of lambda phage was found to be an effective means for virus inactivation, particularly when performed at near-zero (0 degrees C) temperatures, rather than at temperatures above 20 degrees C and below -40 degrees C. The efficiency of inactivation was improved by an increase in applied pressure and repeated cycling from atmospheric to high pressure. In contrast, activities of plasma proteins alkaline phosphatase and total amylase did not vary with temperature and remained within 29 percent and 6 percent, respectively, of starting values after the same pressure treatments. By combining cycling, near-zero temperatures, and high pressure, phage titers in serum were reduced approximately 6 log after 10 to 20 minutes of treatment. Activities of plasma proteins IgG, IgM, and factor X were at 104 percent, 89 percent, and 80 percent, respectively, of starting values after 20 minutes of the same temperature and pressure treatment. CONCLUSION High-pressure procedures may be useful for the inactivation of viruses in blood and other protein-containing components.
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Affiliation(s)
- D W Bradley
- BBI-BioSeq, Inc., Gaithersburg, MD 20977, USA
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Tao F, Zhou X, Hao Y, Che G, Zhu S, Zhao Z. Phase Formation, Crystal Structure and Electrical Properties of La212 Type Compound Substituted by Silver or Praseodymium. Cryst Res Technol 2000. [DOI: 10.1002/(sici)1521-4079(200001)35:1<43::aid-crat43>3.0.co;2-o] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Tao F, Zhou X, Che G, Zhu S, Zhao B. Phase Formation and Structure of (RE,M)2Ca0.5Sr0.5Cu2O6+δ (RE=La,Pr, M=Ca,Sr). Cryst Res Technol 1999. [DOI: 10.1002/(sici)1521-4079(199908)34:7<837::aid-crat837>3.0.co;2-k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Dreier GH, Tao F, Hess RA, Cheung CY, Sciaba LE, Green DJ, Laugharn JA. A bioseparation apparatus with high-pressure fluid injection and fluid sampling. Anal Biochem 1999; 269:223-9. [PMID: 10221993 DOI: 10.1006/abio.1998.2946] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A novel apparatus in which fluids may be injected and sampled at high pressure is described. Bioseparation applications of the apparatus were demonstrated in three model systems: (1) lambdaDNA was eluted under pressure from an anion exchange column into a low-salt (0.25 M) buffer, thereby eliminating conventional time-consuming desalting procedures required for downstream analysis of the DNA; (2) RNA was separated under pressure from a RNA/DNA mixture, thereby enabling rapid differential preparation of nucleic acids; and (3) an antibody was purified from a protein mixture by affinity capture at one pressure and dissociation from the antigen binding partner at a second pressure, thereby enabling the immunoreactivities of both antibody and antigen to be preserved during the separation process.
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Affiliation(s)
- G H Dreier
- BMA Laboratories, Inc., BioSeq, Inc., 25 Olympia Avenue, Unit F, Woburn, Massachusetts 01801-6307, USA
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Tao F, Zhang LM, Sun FY. Hypoxia-ischemia altered expression of glutamate transporter EAAT1 in neonatal rat brain. Zhongguo Yao Li Xue Bao 1999; 20:107-11. [PMID: 10437154] [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] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
AIM To observe altered expression of glutamate transporter EAAT1 after hypoxia-ischemia (H-I) in newborn rat brain. METHODS Expression levels of EAAT1 were detected with immunohistochemistry method. RESULTS EAAT1 was a little expressed in cerebral cortex at sham-operated group [(36 +/- 10) cells/slice]. Its expression in cerebral cortex increased at 24 h and 48 h following H-I [(314 +/- 162) cells/slice and (431 +/- 149) cells/slice, respectively], and recovered to control level at 72 h following H-I [(52 +/- 8) cells/slice]. The expression of EAAT1 in the ipsilateral cortex to common carotid artery (CCA) ligation was higher than that in the contralateral cortex. CONCLUSION After H-I, the expression of EAAT1 had a temporal change in cerebral cortex of newborn rat, and was mainly located in the ipsilateral cortex to CCA ligation.
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Affiliation(s)
- F Tao
- Department of Neurobiology, Shanghai Medical University, China
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Abstract
The Drosophila Nanos protein is a localized repressor of hunchback mRNA translation in the early embryo, and is required for the establishment of the anterior-posterior body axis. Analysis of nanos mutants reveals that a small, evolutionarily conserved, C-terminal region is essential for Nanos function in vivo, while no other single portion of the Nanos protein is absolutely required. Within the C-terminal region are two unusual Cys-Cys-His-Cys (CCHC) motifs that are potential zinc-binding sites. Using absorption spectroscopy and NMR we demonstrate that the CCHC motifs each bind one equivalent of zinc with high affinity. nanos mutations disrupting metal binding at either of these two sites in vitro abolish Nanos translational repression activity in vivo. We show that full-length and C-terminal Nanos proteins bind to RNA in vitro with high affinity, but with little sequence specificity. Mutations affecting the hunchback mRNA target sites for Nanos-dependent translational repression were found to disrupt translational repression in vivo, but had little effect on Nanos RNA binding in vitro. Thus, the Nanos zinc domain does not specifically recognize target hunchback RNA sequences, but might interact with RNA in the context of a larger ribonucleoprotein complex.
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Affiliation(s)
- D Curtis
- Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, Cambridge 02142, USA
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Tao F, Powers-Risius P, Alpen EL, Medvedovsky C, David J, Worgul BV. Radiation effects on late cytopathological parameters in the murine lens relative to particle fluence. Adv Space Res 1994; 14:483-491. [PMID: 11539985 DOI: 10.1016/0273-1177(94)90503-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Lenses of mice irradiated with 250 MeV protons, 670 MeV/amu 20Ne, 600 MeV/amu 56Fe, 600 MeV/amu 93Nb and 593 MeV/amu 139La ions were evaluated by analyzing cytopathological indicators which have been implicated in the cataractogenic process. The LETs ranged from 0.40 keV/micrometer to 953 keV/micrometer and fluences from 1.31 10(3)/mm2 to 4.99 x 10(7)/mm2. 60Co gamma-rays were used as the reference radiation. The doses ranged from 10 to 40 cGy. The lenses were assessed 64 weeks post irradiation in order to observe the late effects of LET and dose on the target cell population of the lens epithelium. Our study shows that growth dependent pathological changes occur at the cellular level as a function of dose and LET. The shapes of the RBE-LET and RBE-dose curves are consistent with previous work on eye and other biological systems done in both our laboratory and others. The RBEmax's were estimated, for the most radiation cataract related cytological changes, MN frequency and MR disorganization, by calculating the ratio of the initial slopes of dose effect curve for various heavy ions to that of 60Co gamma-ray. For each ion studied, the RBEmax derived from micronucleus (MN) frequency is similar to that derived from meridional row (MR) disorganization, suggesting that heavy ions are equally efficient at producing each type of damage. Furthermore, on a per particle basis (particle/cell nucleus), both MN frequency and MR disorganization are LET dependent indicating that these classic precataractogenic indicators are multi-gene effects. Poisson probability analysis of the particle number traversing cell nuclei (average area = 24 micrometers2) suggested that single nuclear traversals determine these changes. By virtue of their precataractogenic nature the data on these endpoints intimate that radiation cataract may also be the consequence of single hits. In any case, these observations are consistent with the current theory of the mechanism of radiation cataractogenesis, which proposes that genomic damage to the epithelial cells surviving the exposure is responsible for opacification.
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Affiliation(s)
- F Tao
- Department of Ophthalmology, Columbia University, New York 10032, USA
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Tao F, Su QF, Zhang JR. [Analysis of the acetylcholine action on the electrical activities of pancreatic islet B-cells in mice]. Sheng Li Xue Bao 1994; 46:105-11. [PMID: 7973790] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Intracellular potential recording and extracellular microiontophoretic techniques were used to study the acetylcholine (ACh) action on the electrical activities of pancreatic islet B-cells in mice. The B cell membrane potential was decreased (5-10 mV) and the spikes were increased (11-17/30 s) by the ACh microinotophoresis. These effects were dependent on glucose and completely blocked by atropine. However, pirenzepine could attenuate the electrical activity by approximately 70%. The ACh-induced membrane depolarization was Ca(2+)-independent and blocked by TTX. But the effect of ACh on spikes was Ca(2+)-dependent and not blocked by verapamil. The results showed that ACh action in the enhancement of glucose-dependent electrical activities of B-cell were mediated by muscarinic receptor, mainly by subtype M1. Then TTX-sensitive Na channel and verapamil-insensitive Ca channel were activated by M1 receptors. Na+ influx resulted in membrane depolarization and Ca2+ influx enhanced spike discharges.
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Affiliation(s)
- F Tao
- Department of Physiology, Shanghai Medical University
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Medvedovsky C, Worgul BV, Huang Y, Brenner DJ, Tao F, Miller J, Zeitlin C, Ainsworth EJ. The influence of dose, dose-rate and particle fragmentation on cataract induction by energetic iron ions. Adv Space Res 1994; 14:475-482. [PMID: 11538029 DOI: 10.1016/0273-1177(94)90502-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Because activities in space necessarily involve chronic exposure to a heterogeneous charged particle radiation field it is important to assess the influence of dose-rate and the possible modulating role of heavy particle fragmentation on biological systems. Using the well-studied cataract model, mice were exposed to plateau 600 MeV/amu 56Fe ions either as acute or fractionated exposures at total doses of 5 - 504 cGy. Additional groups of mice received 20, 360 and 504 cGy behind 50 mm of polyethylene, which simulates body shielding. The reference radiation consisted of 60Co gamma radiation. The animals were examined by slit lamp biomicroscopy over their three year life spans. In accordance with our previous observations with heavy particles, the cataractogenic potential of the 600 MeV/amu 56Fe ions was greater than for low-LET radiation and increased with decreasing dose relative to gamma-rays. Fractionation of a given dose of 56Fe ions did not reduce the cataractogenicity of the radiation compared to the acute regimen. Fragmentation of the beam in the polyethylene did not alter the cataractotoxicity of the ions, either when administered singly or in fractions.
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Affiliation(s)
- C Medvedovsky
- The Eye Radiation and Environmental Research Laboratory, Columbia University, New York, USA
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Tian S, Gao HB, Tao F. [Transportation trends after rat renal intracapsular injection of Salvia miltiorrhizae]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1993; 13:670-1, 645-6. [PMID: 8155945] [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] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The concentration of Salvia miltiorrhizae (SM) was detected at different time after renal intracapsular injection in S.D rats. It showed that SM concentration was higher in kidney than in plasma (P < 0.05). SM concentration in kidney increased gradually, it reached the peak at 24 hour and still remained in higher level at 48 hour. The SM injected in renal capsule could be passively transported to renal tissue and maintained at a high level. This result demonstrated that renal intracapsular injection could be applied as an important therapeutical method for different renal disease.
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Affiliation(s)
- S Tian
- Affiliated People's Hospital, Beijing Medical University
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Tao F, Medvedovsky C, David J, Broglio T, Powers-Risius P, Alpen EL, Worgul BV. Accelerated heavy ions and the lens. IX. Late effects of LET and dose on cellular parameters in the murine lens. Int J Radiat Biol 1993; 64:103-11. [PMID: 8102162 DOI: 10.1080/09553009314551151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Lenses of mice irradiated with 250 MeV protons, 670 MeV/amu 20Ne, 600 MeV/amu 56Fe, 350 MeV/amu 56Fe, 600 MeV/amu 93Nb or 593 MeV/amu 139La ions were evaluated by analysing cytopathological indicators which have been implicated in the cataractogenic process. The LETs ranged from 0.39 to 953 keV/microns and the fluences from 1.31 x 10(3)/mm2 to 5.12 x 10(7)/mm2. The lenses were assessed 64 weeks post-irradiation in order to observe the late effects of LET and dose on the target cell population of the lens' epithelium. Our studies showed that growth-dependent pathological changes occurred at the cellular level as a function of dose and LET. For a given particle dose, as the LET rose, the number of abnormal mitotic figures, micronuclei frequency, and the disorganization of meridional rows increased to a maximum and then reached a plateau or decreased. For particles of the same LET, the severity of meridional rows disorganization and micronuclei frequency increased with increasing dose. The numbers of cells surviving at late times post-irradiation were comparable with those of controls. In addition, the cellular density was similarly unaffected. These observations are consistent with the current theory of the mechanism of radiation cataractogenesis which posits that genomic damage to the epithelial cells surviving the exposure is responsible for opacification.
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Affiliation(s)
- F Tao
- Department of Ophthalmology, Columbia University, New York, NY 10032
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Kim KS, Tao F, Fuchs J, Danishefsky AT, Housset D, Wlodawer A, Woodward C. Crevice-forming mutants of bovine pancreatic trypsin inhibitor: stability changes and new hydrophobic surface. Protein Sci 1993; 2:588-96. [PMID: 7686069 PMCID: PMC2142357 DOI: 10.1002/pro.5560020410] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Four mutants of bovine pancreatic trypsin inhibitor (BPTI) with replacements in the rigid core result in the creation of deep crevices on the surface of the protein. Other than crevices at the site of the mutation, few other differences are observed in the crystal structures of wild-type BPTI and the mutants F22A, Y23A, N43G, and F45A. These mutants are highly destabilized relative to wild type (WT). The differences between WT and mutants in the free energy change associated with cooperative folding/unfolding, delta delta G0 (WT-->mut), have been measured by calorimetry, and they are in good agreement with delta delta G0(WT-->mut) values from hydrogen exchange rates. For F22A the change in free energy difference is about 1.7 kcal/mol at 25 degrees C; for the other three mutants it is in the range of 5-7 kcal/mol at 25 degrees C. The experimental delta delta G0(WT-->mut) values of F22A, Y23A, and F45A are reasonably well accounted for as the sum of two terms: the difference in transfer free energy change, and a contribution from exposure to solvent of new surface (Eriksson, A.E., et al., 1992, Science 255, 178-183), if the recently corrected transfer free energies and surface hydrophobicities (De Young, L. & Dill, K., 1990, J. Phys. Chem. 94, 801-809; Sharp, K.A., et al., 1991a, Science 252, 106-109) are used and only nonpolar surface is taken into account. In N43G, three protein-protein hydrogen bonds are replaced by protein-water hydrogen bonds.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- K S Kim
- Department of Biochemistry, University of Minnesota, St. Paul 55108
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Danishefsky AT, Housset D, Kim KS, Tao F, Fuchs J, Woodward C, Wlodawer A. Crevice-forming mutants in the rigid core of bovine pancreatic trypsin inhibitor: crystal structures of F22A, Y23A, N43G, and F45A. Protein Sci 1993; 2:577-87. [PMID: 8518731 PMCID: PMC2142365 DOI: 10.1002/pro.5560020409] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Crystal structures of four mutants of bovine pancreatic trypsin inhibitor (F22A, Y23A, N43G, and F45A), engineered to alter their stability properties, have been determined. The mutated residues, which are highly conserved among Kunitz-type inhibitors, are located in the rigid core of the molecule. Replacement of the partially buried bulky residues of the wild-type protein with smaller residues resulted in crevices open to the exterior of the molecule. The overall three-dimensional structure of these mutants is very similar to that of the wild-type protein and only small rearrangements are observed among the atoms lining the crevices.
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Affiliation(s)
- A T Danishefsky
- Macromolecular Structure Laboratory, NCI-Frederick Cancer Research and Development Center, ABL, Basic Research Program, Maryland 21702
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Leadley DR, Fletcher R, Nicholas RJ, Tao F, Foxon CT, Harris JJ. Intersubband resonant scattering in GaAs-Ga1-xAlxAs heterojunctions. Phys Rev B Condens Matter 1992; 46:12439-12447. [PMID: 10003161 DOI: 10.1103/physrevb.46.12439] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
Hydrogen exchange rate constants for the 17 slowest exchanging amide NH groups in bovine pancreatic trypsin inhibitor (BPTI) were measured in solution and in form II and form III crystals. All 17 amide hydrogens are buried and intramolecularly hydrogen bonded in the crystal structure, except Lys 41 which is buried and hydrogen bonded to a buried water. Large-scale crystallization procedures were developed for these experiments, and rate constants for both crystal and solution exchange were measured by 1H NMR spectroscopy of exchange-quenched samples in solution. Two conditions of pH and temperature, pH 9.8 and 35 degrees C, and pH 9.4 and 25 degrees C, bring two groups of hydrogens into the experimental time window (minutes to weeks). One consists of the 10 slowest exchanging hydrogens, all of which are associated with the central beta-sheet of BPTI. The second group consists of seven more rapidly exchanging hydrogens, which are distributed throughout the molecule, primarily in a loop or turn. In both groups, most hydrogens exchange more slowly in crystals, but there is considerable variation in the degree to which the exchange is depressed in crystals. Many differences observed for the more rapidly exchanging hydrogens can be attributed to local surface effects arising from intermolecular contacts in the crystal lattice. Within the slower group, however, a very large effect on exchange of Ile 18 and Tyr 35 appears to be selectively transmitted through the matrix of the molecule.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- W Gallagher
- Department of Biochemistry, University of Minnesota, St. Paul 55108
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Hou XP, Tao F, Yi YY, Wang WL. [Surface charged liposomes as drug carriers and in vivo tests of mice infected with toxoplasma]. Yao Xue Xue Bao 1989; 24:53-7. [PMID: 2801125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The surface charge is one of the most important properties of liposomes. In this paper surface potential of liposomes was measured by fluorimetry using 1.8-ANS as a probe and by microelectrophoresis. The encapsulation efficiency and leakage rate of ionic drugs were influenced by the surface charge of liposomes. Higher encapsulation efficiency and lower leakage rate were resulted if the surface charge of liposomes was opposite to the ionic charge of encapsulated drug. Mice infected with toxoplasma were used as a model. In in vivo test, liposome-drug was compared with the free drug. The average survival days of groups of liposome-drugs were much longer than that of the group of free drugs. Mouse infected with toxoplasma is a simple, convenient and accurate model for measuring the biological activation of liposome-drugs.
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