526
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Zheng Z, Jin Z, Zhou X, Xia K, Ma C. An ABA-binding protein with nucleic acid-binding property. ACTA ACUST UNITED AC 2011; 41:209-16. [PMID: 18726208 DOI: 10.1007/bf02882729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/1997] [Indexed: 10/22/2022]
Abstract
Maize cDNA expression library was screened using the antibodies against ABA-binding proteins (ABBP). From 200 000 separated phage plaques, only one cDNA clone coding for a polypeptide was obtained. It shows 60%-65% homology to the genes of nucleic acid-binding proteins in mammalia. However, about 120 cDNA clones coding maize 17s rRNA were unexpectedly obtained. In view of this, the ABBP purified by ABA affinity chromatography and the antibodies derived from the purified ABBP were examined. It is found that rRNA is indeed present in the ABBP. In addition, the obtained antibodies could recognize RNA as well as ABBP. It is suggested that the ABBP have nucleic acid-binding property and can form a complex with rRNA.
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527
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Ma C, Cvetkovic D, Chen X, Chen L. WE-E-220-05: On-Thermal Pulsed Focused Ultrasound for Cancer Therapy. Med Phys 2011. [DOI: 10.1118/1.3613400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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528
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Ma C, Lin M, Wang L, Price R. SU-E-T-803: Dosimetric Evaluation for Pulsed Low Dose Rate Radiation Therapy Using RapidArc Delivery Techniques. Med Phys 2011. [DOI: 10.1118/1.3612767] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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529
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Lin CS, Li DC, Ma C. PP-087 Investigation of HBV infection rate and virus genotypes of Yao population in Guangdong Ruyuan. Int J Infect Dis 2011. [DOI: 10.1016/s1201-9712(11)60239-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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530
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Ghosh S, Dai C, Brown K, Rajendiran E, Makarenko S, Baker J, Ma C, Halder S, Montero M, Ionescu VA, Klegeris A, Vallance BA, Gibson DL. Colonic microbiota alters host susceptibility to infectious colitis by modulating inflammation, redox status, and ion transporter gene expression. Am J Physiol Gastrointest Liver Physiol 2011; 301:G39-49. [PMID: 21454446 DOI: 10.1152/ajpgi.00509.2010] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Individuals vary in their resistance to enteric infections. The role of the intestinal microbiota in altering susceptibility to enteric infection is relatively unknown. Previous studies have identified that C3H/HeOuJ mice suffer 100% mortality during Citrobacter rodentium-induced colitis, whereas C57BL/6 mice recover from infection. The basis for their differences in susceptibility is unclear and has been mainly attributed to differences in host genetics. This study investigated the role of the intestinal microbiota in altering susceptibility to C. rodentium-induced colitis. When the feces of C57BL/6 mice were gavaged into antibiotic treated C3H/HeOuJ mice, the C57BL/6 microflora led to a complete reversal in mortality patterns where 100% of the C3H/HeOuJ mice survived infection. This protection corresponded with reduced colonic pathology and less systemic pathogen load and was associated with increased inflammatory and redox responses with reduced epithelial cell death. C3H/HeOuJ mice are normally susceptible to infection-induced dehydration due to defective expression of colonic ion transporters such as Dra, CA IV, and CA I; expression of these genes was normalized when C3H/HeOuJ mice were colonized with the C57BL/6 microflora. Together, these data reveal that the colonic microbiota play a critical role in protecting against intestinal infection by inducing proinflammatory and prooxidant responses that control pathogen load as well as ion transporter gene expression previously shown to prevent fatal dehydration. Protection of mice from lethal colitis was associated with higher levels of bacteria from Bacteroidetes. This study reveals that the microbiota is sufficient to overcome inherent genetic susceptibility patterns in C3H/HeOuJ mice that cause mortality during C. rodentium infection.
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531
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Lin M, Tafo AG, Li J, Fourkal E, Ma C. TU-G-BRB-03: Respiratory Motion Effects on Lung Proton SBRT Treatment. Med Phys 2011. [DOI: 10.1118/1.3613223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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532
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Jin L, Li JS, Wang L, Fan J, Price R, Ma C. SU-E-T-402: Modulated Electron Radiotherapy Dose Delivery Using Photon Multileaf Collimators. Med Phys 2011. [DOI: 10.1118/1.3612356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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533
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Lin T, Hossain M, Ma C. SU-E-J-181: Evaluation of Motion Artifacts of Metal Localization Devices on KV and MV Cone Beam CT. Med Phys 2011. [DOI: 10.1118/1.3611949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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534
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Hossain M, Tafo AG, Lin T, Price R, Ma C. SU-E-T-240: In-Vivo Measurement of Shallow Dose for a Spoiled Mega Voltage Radiotherapy Beam. Med Phys 2011. [DOI: 10.1118/1.3612190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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535
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Veltchev I, Fourkal E, Ma C. SU-E-T-354: Pairs of Sloped Spread-Out Bragg Peaks Improve Normal Tissue Sparing. Med Phys 2011. [DOI: 10.1118/1.3612308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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536
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Chen X, Cvetkovic D, Chen L, Ma C. WE-G-220-07: Treatment Assessment for Pulsed Focused Ultrasound Therapy of Prostate Tumor Using a Clinical 1.5T MRI. Med Phys 2011. [DOI: 10.1118/1.3613456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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537
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Gong G, Yin Y, Liu T, Chen J, Lu J, Ma C. SU-E-J-08: Research the Feasibility of High Dose Radiotherapy for Brain Metastases Guided by the Contrasted Cone Beam CT. Med Phys 2011. [DOI: 10.1118/1.3611776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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538
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Xue J, Liu H, Chen X, Lin M, Dong Z, Wang L, Chen L, Ma C. SU-E-T-277: Image-Guided Radiation Therapy: The Accuracy of CT-MR Fusion for Prostate Treatment Planning. Med Phys 2011. [DOI: 10.1118/1.3612228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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539
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Price R, Veltchev I, Ma C. SU-E-T-425: Plan-Specific Gamma Analysis Acceptance Criteria for Multi-Chamber Arrays. Med Phys 2011. [DOI: 10.1118/1.3612379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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540
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Wang L, Uzan J, Nahum A, Fan J, Jin L, Ma C. SU-E-T-09: Investigate the Impact of Prolonged Treatment Delivery Time on Tumor Control Probability. Med Phys 2011. [DOI: 10.1118/1.3611959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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541
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Chen L, Mu Z, Chen X, Cvetkovic D, Pollack A, Ma C. SU-E-U-01: MR Guided Pulsed High Intensity Focused Ultrasound Enhancement of Chemotherapy for Prostate Cancer. Med Phys 2011. [DOI: 10.1118/1.3612862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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542
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Cvetkovic D, Chen X, Ma C, Chen L. WE-E-220-06: Histological Changes in the Mouse Prostate Tumors Treated with Non-Thermal Pulsed Focused Ultrasound. Med Phys 2011. [DOI: 10.1118/1.3613401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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543
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Ma C, Yin Y, Lu J, Liu T, Gong G. SU-E-T-620: Effect of Different Motion Management Strategies in Liver Cancer Using Four-Dimesional Computed Tomography Image and Active Breathing Control Technology. Med Phys 2011. [DOI: 10.1118/1.3612583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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544
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Veltchev I, Fourkal E, Ma C. MO-G-BRB-03: On the Increased RBE of Proton Clusters. Med Phys 2011. [DOI: 10.1118/1.3613054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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545
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Fan J, Fourka E, Hayes S, Jin L, Wang L, Price R, Ma C. SU-E-T-887: Cyberknife Treatment for Early Stage Oral Tongue Cancer - Feasibility Study. Med Phys 2011. [DOI: 10.1118/1.3612851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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546
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Wang L, Fan J, Lin T, Jin L, Ma C. SU-E-T-521: Is Cone Beam CT (CBCT) Equivalent to 4-Dimensinoal (4D) MIP Images to Account for Target Motion in SBRT Lung Treatment? Med Phys 2011. [DOI: 10.1118/1.3612474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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547
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Fourkal E, Veltchev I, Lin M, Ma C. SU-E-T-677: Tissue Inhomogeneity in Hadron Therapy. Med Phys 2011. [DOI: 10.1118/1.3612639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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548
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Liu T, Yin Y, Bai T, Chen J, Lu J, Sun T, Gao M, Ma C. SU-E-T-821: Comparison of Intensity-Modulated Arc Therapy and Intensity-Modulated Radiotherapy Plans for Nasopharyngeal Carcinoma Simultaneously Integrated Boost Radiation Therapy. Med Phys 2011. [DOI: 10.1118/1.3612785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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549
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Fan J, Hayes S, Jin L, Wang L, Yang J, Ma C. SU-E-T-876: Comparison of Dose Distributions for Plans Optimized by Using Monte Carlo and Ray-Tracing Algorithms for the Treatment of Lung Tumors with CyberKnife. Med Phys 2011. [DOI: 10.1118/1.3612840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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550
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Myint KZ, Ma C, Wang L, Xie XQ. Fragment-similarity-based QSAR (FS-QSAR) algorithm for ligand biological activity predictions. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2011; 22:385-410. [PMID: 21598200 DOI: 10.1080/1062936x.2011.569943] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Quantitative structure-activity relationship (QSAR) studies are useful computational tools often used in drug discovery research and in many scientific disciplines. In this study, a robust fragment-similarity-based QSAR (FS-QSAR) algorithm was developed to correlate structures with biological activities by integrating fragment-based drug design concept and a multiple linear regression method. Similarity between any pair of training and testing fragments was determined by calculating the difference of lowest or highest eigenvalues of the chemistry space BCUT matrices of corresponding fragments. In addition to the BCUT-similarity function, molecular fingerprint Tanimoto coefficient (Tc) similarity function was also used as an alternative for comparison. For validation studies, the FS-QSAR algorithm was applied to several case studies, including a dataset of COX2 inhibitors and a dataset of cannabinoid CB2 triaryl bis-sulfone antagonist analogues, to build predictive models achieving average coefficient of determination (r(2)) of 0.62 and 0.68, respectively. The developed FS-QSAR method is proved to give more accurate predictions than the traditional and one-nearest-neighbour QSAR methods and can be a useful tool in the fragment-based drug discovery for ligand activity prediction.
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