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García-Rivera C, Navarro M, Parra M, Sánchez Bautista A, Gómez I, Ventero MP, Rodríguez JC. [In vitro activity of delafloxacin against clinical isolates of carbapenem-resistant Pseudomonas aeruginosa in a stage prior to the clinical use of this drug]. Rev Esp Quimioter 2024; 37:104-105. [PMID: 38140799 PMCID: PMC10874670 DOI: 10.37201/req/080.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 10/25/2023] [Accepted: 11/03/2023] [Indexed: 12/24/2023]
Affiliation(s)
| | | | | | | | | | - M P Ventero
- María-Paz Ventero, Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL), Av. Pintor Baeza 12, 03010. Alicante, Spain.
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Neveu M, Quinn R, Barge LM, Craft KL, German CR, Getty S, Glein C, Parra M, Burton AS, Cary F, Corpolongo A, Fifer L, Gangidine A, Gentry D, Georgiou CD, Haddadin Z, Herbold C, Inaba A, Jordan SF, Kalucha H, Klier P, Knicely K, Li AY, McNally P, Millan M, Naz N, Raj CG, Schroedl P, Timm J, Yang Z. Future of the Search for Life: Workshop Report. Astrobiology 2024; 24:114-129. [PMID: 38227837 DOI: 10.1089/ast.2022.0158] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
The 2-week, virtual Future of the Search for Life science and engineering workshop brought together more than 100 scientists, engineers, and technologists in March and April 2022 to provide their expert opinion on the interconnections between life-detection science and technology. Participants identified the advances in measurement and sampling technologies they believed to be necessary to perform in situ searches for life elsewhere in our Solar System, 20 years or more in the future. Among suggested measurements for these searches, those pertaining to three potential indicators of life termed "dynamic disequilibrium," "catalysis," and "informational polymers" were identified as particularly promising avenues for further exploration. For these three indicators, small breakout groups of participants identified measurement needs and knowledge gaps, along with corresponding constraints on sample handling (acquisition and processing) approaches for a variety of environments on Enceladus, Europa, Mars, and Titan. Despite the diversity of these environments, sample processing approaches all tend to be more complex than those that have been implemented on missions or envisioned for mission concepts to date. The approaches considered by workshop breakout groups progress from nondestructive to destructive measurement techniques, and most involve the need for fluid (especially liquid) sample processing. Sample processing needs were identified as technology gaps. These gaps include technology and associated sampling strategies that allow the preservation of the thermal, mechanical, and chemical integrity of the samples upon acquisition; and to optimize the sample information obtained by operating suites of instruments on common samples. Crucially, the interplay between science-driven life-detection strategies and their technological implementation highlights the need for an unprecedented level of payload integration and extensive collaboration between scientists and engineers, starting from concept formulation through mission deployment of life-detection instruments and sample processing systems.
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Affiliation(s)
- Marc Neveu
- Department of Astronomy, University of Maryland, College Park, Maryland, USA
- NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
| | - Richard Quinn
- NASA Ames Research Center, Moffett Field, California, USA
| | - Laura M Barge
- NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
| | - Kathleen L Craft
- Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA
| | | | | | | | - Macarena Parra
- NASA Ames Research Center, Moffett Field, California, USA
| | | | - Francesca Cary
- Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, Mānoa, Hawaii, USA
| | - Andrea Corpolongo
- Department of Geosciences, University of Cincinnati, Cincinnati, Ohio, USA
| | - Lucas Fifer
- Department of Earth and Space Sciences, University of Washington, Seattle, Washington, USA
| | - Andrew Gangidine
- Office of Development, Yale University, New Haven, Connecticut, USA
| | - Diana Gentry
- NASA Ames Research Center, Moffett Field, California, USA
| | | | - Zaid Haddadin
- Department of Electrical and Computer Engineering, University of California, San Diego, California, USA
| | - Craig Herbold
- School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
| | - Aila Inaba
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, New Jersey, USA
| | - Seán F Jordan
- School of Chemical Sciences, Dublin City University, Dublin, Ireland
| | - Hemani Kalucha
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA
| | - Pavel Klier
- NASA Ames Research Center, Moffett Field, California, USA
- NASA Postdoctoral Program, Oak Ridge Associated Universities, Oak Ridge, Tennessee, USA
| | - Kas Knicely
- Geophysical Institute, University of Alaska, Fairbanks, Alaska, USA
| | - An Y Li
- Department of Earth and Space Sciences, University of Washington, Seattle, Washington, USA
| | - Patrick McNally
- Space Physics Research Laboratory, University of Michigan, Ann Arbor, Michigan, USA
| | - Maëva Millan
- Laboratory Atmosphere and Space Observations, Guyancourt, France
| | - Neveda Naz
- Department of Chemistry, Tufts University, Medford, Massachusetts, USA
| | - Chinmayee Govinda Raj
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Peter Schroedl
- Department of Biology, Boston University, Boston, Massachusetts, USA
| | - Jennifer Timm
- Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, New Jersey, USA
| | - Ziming Yang
- Department of Chemistry, Oakland University, Rochester, Michigan, USA
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Grossi JR, Parra M, Benalcázar-Jalkh EB, Giovanini AF, Zielak JC, Sebstiani AM, Gonzaga CC, Coelho PG, Witek L, Deliberador TM. Effects of a local single dose administration of growth hormone on the osseointegration of titanium implants. Med Oral Patol Oral Cir Bucal 2022; 27:e174-e180. [PMID: 35218646 PMCID: PMC8898577 DOI: 10.4317/medoral.25164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/22/2021] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND The aim of the present study was to evaluate the effect of different concentrations of growth hormone (GH) on endosteal implant's surface at the early stages of osseointegration. MATERIAL AND METHODS Sixty tapered acid-etched titanium implants were divided into four groups: i) Collagen, used as a control group; and three experimental groups, where after collagen coating, GH was administered directly to the surface in varying concentrations: ii) 0.265 mg, iii) 0.53 mg, and iv) 1 mg. Implants were placed in an interpolated fashion in the anterior flange of C3, C4 or C5 of 15 sheep with minimum distance of 6 mm between implants. After 3-, 6- and 12-weeks of healing samples were harvested, histologically processed, qualitatively and quantitatively assessed for bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO). RESULTS Statistical analysis as a function of time in vivo and coating resulted in no significant differences for BIC and BAFO at any evaluation time point. Histological evaluation demonstrated similar osseointegration features for all groups with woven bone formation at 3 weeks and progressive replacement of woven for lamellar bone in close contact with the implant surface and within the implant's threads. CONCLUSIONS A single local application of growth hormone to the surface of titanium implants did not yield improved implant osseointegration independent of healing time.
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Affiliation(s)
- J-R Grossi
- Division of Biomaterials New York University College of Dentistry 433 1st Avenue, Room 842 New York, NY 10010-4086 USA
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Padgen MR, Liddell LC, Bhardwaj SR, Gentry D, Marina D, Parra M, Boone T, Tan M, Ellingson L, Rademacher A, Benton J, Schooley A, Mousavi A, Friedericks C, Hanel RP, Ricco AJ, Bhattacharya S, Maria SRS. BioSentinel: A Biofluidic Nanosatellite Monitoring Microbial Growth and Activity in Deep Space. Astrobiology 2021; 23:637-647. [PMID: 33601926 DOI: 10.1089/ast.2020.2305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Small satellite technologies, particularly CubeSats, are enabling breakthrough research in space. Over the past 15 years, NASA Ames Research Center has developed and flown half a dozen biological CubeSats in low Earth orbit (LEO) to conduct space biology and astrobiology research investigating the effects of the space environment on microbiological organisms. These studies of the impacts of radiation and reduced gravity on cellular processes include dose-dependent interactions with antimicrobial drugs, measurements of gene expression and signaling, and assessment of radiation damage. BioSentinel, the newest addition to this series, will be the first deep space biological CubeSat, its heliocentric orbit extending far beyond the radiation-shielded environment of low Earth orbit. BioSentinel's 4U biosensing payload, the first living biology space experiment ever conducted beyond the Earth-Moon system, will use a microbial bioassay to assess repair of radiation-induced DNA damage in eukaryotic cells over a duration of 6-12 months. Part of a special collection of articles focused on BioSentinel and its science mission, this article describes the design, development, and testing of the biosensing payload's microfluidics and optical systems, highlighting improvements relative to previous CubeSat life-support and bioanalytical measurement technologies.
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Affiliation(s)
| | - Lauren C Liddell
- NASA Ames Research Center, Moffett Field, California, USA
- Logyx LLC, Mountain View, California, USA
| | - Shilpa R Bhardwaj
- NASA Ames Research Center, Moffett Field, California, USA
- FILMSS/Bionetics, NASA Ames Research Center, Moffett Field, California, USA
| | - Diana Gentry
- NASA Ames Research Center, Moffett Field, California, USA
| | - Diana Marina
- NASA Ames Research Center, Moffett Field, California, USA
- Amyris, Inc., Emeryville, California, USA
| | - Macarena Parra
- NASA Ames Research Center, Moffett Field, California, USA
| | - Travis Boone
- NASA Ames Research Center, Moffett Field, California, USA
- Millenium Engineering & Integration Co., NASA Ames Research Center, Moffett Field, California, USA
| | - Ming Tan
- NASA Ames Research Center, Moffett Field, California, USA
- Wainamics, Inc., Pleasanton, California, USA
| | - Lance Ellingson
- NASA Ames Research Center, Moffett Field, California, USA
- Millenium Engineering & Integration Co., NASA Ames Research Center, Moffett Field, California, USA
| | - Abraham Rademacher
- NASA Ames Research Center, Moffett Field, California, USA
- Millenium Engineering & Integration Co., NASA Ames Research Center, Moffett Field, California, USA
| | - Joshua Benton
- NASA Ames Research Center, Moffett Field, California, USA
- FILMSS/Wyle Labs, NASA Ames Research Center, Moffett Field, California, USA
| | - Aaron Schooley
- NASA Ames Research Center, Moffett Field, California, USA
- Millenium Engineering & Integration Co., NASA Ames Research Center, Moffett Field, California, USA
| | | | | | - Robert P Hanel
- NASA Ames Research Center, Moffett Field, California, USA
| | | | | | - Sergio R Santa Maria
- NASA Ames Research Center, Moffett Field, California, USA
- University of New Mexico, Albuquerque, New Mexico, USA
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Insausti A, Calabrese C, Parra M, Usabiaga I, Vallejo-López M, Écija P, Basterretxea FJ, Grabow JU, Caminati W, Lesarri A, Cocinero EJ. Conformational impact of aliphatic side chains in local anaesthetics: benzocaine, butamben and isobutamben. Chem Commun (Camb) 2020; 56:6094-6097. [PMID: 32352456 DOI: 10.1039/d0cc00760a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We studied the impact of aliphatic side chains on the stability and conformational landscape of the local anaesthetics benzocaine, butamben and isobutamben, combining high-resolution rotational spectroscopy in the microwave and millimetre regions and molecular modelling. The study reveals the connections between alkyl chain flexibility and molecular conformations.
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Affiliation(s)
- A Insausti
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain.
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7
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Parra M, Valenzuela B, Imarai M, Modak B. Obtainment and evaluation of adjuvant effect of the aromatic geranyl derivative Filifolinone in bacterin of Piscirickettsia salmonis. J Fish Dis 2018; 41:157-159. [PMID: 28736920 DOI: 10.1111/jfd.12669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 05/11/2017] [Accepted: 05/15/2017] [Indexed: 06/07/2023]
Affiliation(s)
- M Parra
- Laboratory of Natural Products Chemistry, Centre of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
| | - B Valenzuela
- Laboratory of Natural Products Chemistry, Centre of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
| | - M Imarai
- Laboratory of Immunology, Centre of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
| | - B Modak
- Laboratory of Natural Products Chemistry, Centre of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Santiago, Chile
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Parra M, Jung J, Boone TD, Tran L, Blaber EA, Brown M, Chin M, Chinn T, Cohen J, Doebler R, Hoang D, Hyde E, Lera M, Luzod LT, Mallinson M, Marcu O, Mohamedaly Y, Ricco AJ, Rubins K, Sgarlato GD, Talavera RO, Tong P, Uribe E, Williams J, Wu D, Yousuf R, Richey CS, Schonfeld J, Almeida EAC. Microgravity validation of a novel system for RNA isolation and multiplex quantitative real time PCR analysis of gene expression on the International Space Station. PLoS One 2017; 12:e0183480. [PMID: 28877184 PMCID: PMC5587110 DOI: 10.1371/journal.pone.0183480] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 08/04/2017] [Indexed: 11/29/2022] Open
Abstract
The International Space Station (ISS) National Laboratory is dedicated to studying the effects of space on life and physical systems, and to developing new science and technologies for space exploration. A key aspect of achieving these goals is to operate the ISS National Lab more like an Earth-based laboratory, conducting complex end-to-end experimentation, not limited to simple microgravity exposure. Towards that end NASA developed a novel suite of molecular biology laboratory tools, reagents, and methods, named WetLab-2, uniquely designed to operate in microgravity, and to process biological samples for real-time gene expression analysis on-orbit. This includes a novel fluidic RNA Sample Preparation Module and fluid transfer devices, all-in-one lyophilized PCR assays, centrifuge, and a real-time PCR thermal cycler. Here we describe the results from the WetLab-2 validation experiments conducted in microgravity during ISS increment 47/SPX-8. Specifically, quantitative PCR was performed on a concentration series of DNA calibration standards, and Reverse Transcriptase-quantitative PCR was conducted on RNA extracted and purified on-orbit from frozen Escherichia coli and mouse liver tissue. Cycle threshold (Ct) values and PCR efficiencies obtained on-orbit from DNA standards were similar to Earth (1 g) controls. Also, on-orbit multiplex analysis of gene expression from bacterial cells and mammalian tissue RNA samples was successfully conducted in about 3 h, with data transmitted within 2 h of experiment completion. Thermal cycling in microgravity resulted in the trapping of gas bubbles inside septa cap assay tubes, causing small but measurable increases in Ct curve noise and variability. Bubble formation was successfully suppressed in a rapid follow-up on-orbit experiment using standard caps to pressurize PCR tubes and reduce gas release during heating cycles. The WetLab-2 facility now provides a novel operational on-orbit research capability for molecular biology and demonstrates the feasibility of more complex wet bench experiments in the ISS National Lab environment.
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Affiliation(s)
- Macarena Parra
- Space Biosciences Research Branch, NASA Ames Research Center, Moffett Field, California, United States of America
| | - Jimmy Jung
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- KBRWyle, Mountain View, California, United States of America
| | - Travis D. Boone
- Office of the Director, NASA Ames Research Center, Moffett Field, California, United States of America
- Millenium Engineering & Integration Co, Mountain View, California, United States of America
| | - Luan Tran
- Space Biosciences Research Branch, NASA Ames Research Center, Moffett Field, California, United States of America
- KBRWyle, Mountain View, California, United States of America
| | - Elizabeth A. Blaber
- Space Biosciences Research Branch, NASA Ames Research Center, Moffett Field, California, United States of America
- Universities Space Research Association, Mountain View, California, United States of America
| | - Mark Brown
- Applications Development, Claremont Biosolutions, Upland, California, United States of America
| | - Matthew Chin
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- Millenium Engineering & Integration Co, Mountain View, California, United States of America
| | - Tori Chinn
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- Millenium Engineering & Integration Co, Mountain View, California, United States of America
| | - Jacob Cohen
- Office of the Director, NASA Ames Research Center, Moffett Field, California, United States of America
| | - Robert Doebler
- Applications Development, Claremont Biosolutions, Upland, California, United States of America
| | - Dzung Hoang
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- Millenium Engineering & Integration Co, Mountain View, California, United States of America
| | - Elizabeth Hyde
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- Millenium Engineering & Integration Co, Mountain View, California, United States of America
| | - Matthew Lera
- KBRWyle, Mountain View, California, United States of America
- Flight Systems Implementation Branch, NASA Ames Research Center, Moffett Field, California, United States of America
| | - Louie T. Luzod
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
| | - Mark Mallinson
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
| | - Oana Marcu
- Space Biosciences Research Branch, NASA Ames Research Center, Moffett Field, California, United States of America
- KBRWyle, Mountain View, California, United States of America
| | - Youssef Mohamedaly
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- Millenium Engineering & Integration Co, Mountain View, California, United States of America
| | - Antonio J. Ricco
- Mission Design Division, NASA Ames Research Center, Moffett Field, California, United States of America
- Stanford University, Palo Alto, California, United States of America
| | - Kathleen Rubins
- NASA Astronaut Corps, NASA Johnson Space Center, Houston, Texas, United States of America
| | - Gregory D. Sgarlato
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- KBRWyle, Mountain View, California, United States of America
| | - Rafael O. Talavera
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- Millenium Engineering & Integration Co, Mountain View, California, United States of America
| | - Peter Tong
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
- Millenium Engineering & Integration Co, Mountain View, California, United States of America
| | - Eddie Uribe
- Universities Space Research Association, Mountain View, California, United States of America
| | - Jeffrey Williams
- NASA Astronaut Corps, NASA Johnson Space Center, Houston, Texas, United States of America
| | - Diana Wu
- KBRWyle, Mountain View, California, United States of America
- Mission Design Division, NASA Ames Research Center, Moffett Field, California, United States of America
| | - Rukhsana Yousuf
- Space Biosciences Research Branch, NASA Ames Research Center, Moffett Field, California, United States of America
- KBRWyle, Mountain View, California, United States of America
| | - Charles S. Richey
- Universities Space Research Association, Mountain View, California, United States of America
| | - Julie Schonfeld
- Engineering Systems Division, NASA Ames Research Center, Moffett Field, California, United States of America
| | - Eduardo A. C. Almeida
- Space Biosciences Research Branch, NASA Ames Research Center, Moffett Field, California, United States of America
- * E-mail:
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Díaz E, Elgueta E, Sanchez SA, Barberá J, Vergara J, Parra M, Dahrouch M. Hybrid photoluminescent materials containing a benzobisthiazole core for liquid crystal and gel applications. Soft Matter 2017; 13:1804-1815. [PMID: 28169382 DOI: 10.1039/c6sm02650h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Tetra- and hexacatenar amide compounds containing a linear centrosymmetric benzobisthiazole core were synthesized with good yields. These compounds were characterized and their structures confirmed by elemental analysis, and FT-IR, Maldi mass and NMR spectroscopy. All compounds exhibited excellent thermal stability up to 330 °C. The tetracatenar series containing a double substitution in the meta positions did not show mesomorphic behaviour, whereas the hexacatenar and tetracatenar series having a double substitution in the meta and para positions showed liquid crystal properties with optical textures typical of columnar mesophases corroborated by POM analysis. The mesomorphic properties were dependent on the length, number and position of alkoxy chains attached at the end of the rigid core. XRD studies of the hexacatenar series showed the hexagonal columnar structure of the mesophases. Photoluminescence properties in solution were observed in the visible region, with good quantum yields. In the solid state, these compounds behave as blue emitters and they are able to change colour with acid or base addition. The hexacatenar benzobisthiazole compound with an alkoxy chain of 14 carbons presented properties of a supergelator in chloroform, leading to the formation of a fluorescent organogel material with fluorescence emission in the blue region.
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Affiliation(s)
- E Díaz
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - E Elgueta
- Centro de Investigación de Polímeros Avanzados (CIPA), Universidad de Concepción, Casilla 160-C, Concepción, Chile
| | - S A Sanchez
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile
| | - J Barberá
- Departamento de Química Orgánica, Facultad de Ciencias-Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C, 50009 Zaragoza, Spain
| | - J Vergara
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - M Parra
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - M Dahrouch
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
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Barneda-Zahonero B, Collazo O, Azagra A, Fernández-Duran I, Serra-Musach J, Islam ABMMK, Vega-García N, Malatesta R, Camós M, Gómez A, Román-González L, Vidal A, López-Bigas N, Villanueva A, Esteller M, Parra M. The transcriptional repressor HDAC7 promotes apoptosis and c-Myc downregulation in particular types of leukemia and lymphoma. Cell Death Dis 2015; 6:e1635. [PMID: 25675295 PMCID: PMC4669785 DOI: 10.1038/cddis.2014.594] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 12/16/2014] [Accepted: 12/18/2014] [Indexed: 12/26/2022]
Abstract
The generation of B cells is a complex process requiring several cellular transitions, including cell commitment and differentiation. Proper transcriptional control to establish the genetic programs characteristic of each cellular stage is essential for the correct development of B lymphocytes. Deregulation of these particular transcriptional programs may result in a block in B-cell maturation, contributing to the development of hematological malignancies such as leukemia and lymphoma. However, very little is currently known about the role of transcriptional repressors in normal and aberrant B lymphopoiesis. Here we report that histone deacetylase 7 (HDAC7) is underexpressed in pro-B acute lymphoblastic leukemia (pro-B-ALL) and Burkitt lymphoma. Ectopic expression of HDAC7 induces apoptosis, leads to the downregulation of c-Myc and inhibits the oncogenic potential of cells in vivo, in a xenograft model. Most significantly, we have observed low levels of HDAC7 expression in B-ALL patient samples, which is correlated with the increased levels of c-Myc. From a mechanistic angle, we show that ectopically expressed HDAC7 localizes to the nucleus and interacts with the transcription factor myocyte enhancer factor C (MEF2C) and the corepressors HDAC3 and SMRT. Accordingly, both the HDAC7–MEF2C interaction domain as well as its catalytic domain are involved in the reduced cell viability induced by HDAC7. We conclude that HDAC7 has a potent anti-oncogenic effect on specific B-cell malignancies, indicating that its deregulation may contribute to the pathogenesis of the disease.
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Affiliation(s)
- B Barneda-Zahonero
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - O Collazo
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - A Azagra
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - I Fernández-Duran
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - J Serra-Musach
- Breast Cancer and Systems Biology Unit, Translational Research Laboratory, Catalan Institute of Oncology (ICO), Bellvitge Institute for Biomedical Research (IDIBELL), Avenida Gran Via s/n km 2.7, 08907 L'Hospitalet, Barcelona, Spain
| | - A B M M K Islam
- Department of Genetic Engineering & Biotechnology, University of Dhaka, Dhaka, Bangladesh
| | - N Vega-García
- Department of Hematology, Hospital Sant Joan de Déu, Barcelona, Spain
| | - R Malatesta
- Department of Hematology, Hospital Sant Joan de Déu, Barcelona, Spain
| | - M Camós
- Department of Hematology, Hospital Sant Joan de Déu, Barcelona, Spain
| | - A Gómez
- Cancer Epigenetics Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - L Román-González
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
| | - A Vidal
- Department of Pathology, University Hospital of Bellvitge, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - N López-Bigas
- 1] Research Unit on Biomedical Informatics, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Dr Aiguader 88, 08003 Barcelona, Spain [2] Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - A Villanueva
- Translational Research Laboratory, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute, Barcelona, Spain
| | - M Esteller
- 1] Cancer Epigenetics Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain [2] Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain [3] Department of Physiological Sciences II, School of Medicine, University of Barcelona, Barcelona, Spain
| | - M Parra
- Cellular Differentiation Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research institute (IDIBELL), Avenida Gran Via 199, 08908 L'Hospitalet, Barcelona, Spain
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11
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Ferri D, Barba-Bon A, Costero AM, Gaviña P, Parra M, Gil S. An Au(iii)–amino alcohol complex for degradation of organophosphorus pesticides. RSC Adv 2015. [DOI: 10.1039/c5ra20645f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
A gold(iii)–amino alcohol complex induces the P–S bond cleavage in organophosphorous pesticides giving rise to less toxic compounds.
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Affiliation(s)
- D. Ferri
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
| | - A. Barba-Bon
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
| | - A. M. Costero
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
| | - P. Gaviña
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
| | - M. Parra
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
| | - S. Gil
- Instituto Interuniversitario de Reconocimiento Molecular y Desarrollo Tecnológico
- Universitat de València
- 46100-Burjassot
- Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN)
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Parra M, Villouta S, Vera V, Belmar J, Zúñiga C, Zunza H. Synthesis and Mesomorphic Properties of Azo Compounds Derived from Phenyl-and Thienyl-1,3,4-Thiadiazole. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-1997-1215] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The synthesis and mesomorphic behaviour of new series of liquid crystals containing 1,3,4- thiadiazole and thiophene rings with azo central bond are reported (series 5a and 5b). All compounds of series 5a exhibit enantiotropic nematic mesophase and the higher homologues (n = 9 - 10) also show a monotropic smectic C phase. Series 5b show dimorphism SC - N (for n = 5 - 7 the SC is monotropic). These series are compared with the Schiff’s bases analogues, the imine bond gives rise to similar liquid crystals phase but larger mesomorphic range.
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Affiliation(s)
- M. Parra
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - Sh. Villouta
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - V. Vera
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - J. Belmar
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - C. Zúñiga
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
| | - H. Zunza
- Concepción, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción-Chile
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Aguilera C, Parra M, Fuentes G. Synthesis and Mesomorphic Properties of Polymethylene-α,ω–bis [2-thio- 5-(4',4"n-alcoxybenzoyIoxy)phenyl]-1,3,4-oxadiazole. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-1998-0316] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Three homologous series of polymethylene-α,ω-bis[2-thio-5(4′,4″n-alkoxybenzoyloxy)- phenyl]-1,3,4-oxadiazole (series 5 a, b, c), are reported.The compounds have identical mesogenic units at both ends of a spacer (i.e. they are twins). These twins possess a spacer of 6, 8 and 10 carbon atoms joined directly to the oxadiazole ring through sulphur atoms. The lateral alkylic chains vary between 6 and 10 carbon atoms.The presence of enantiotropic and monotropic nematic phase is related to the length of the spacer group. The influence of molecular structure on the mesomorphic properties has been studied. Mesomorphic properties and phase transitions have been determined using polarizing hot-stage microscopy and differential scanning calorimetry.
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Affiliation(s)
- C. Aguilera
- Departamento de Polímeros, Departamento de Qufmica Orgänica, Facultad de Ciencias Qmmicas,Universidad de Concepcion, Casilla 3-C, Concepcion, Chile
| | - M. Parra
- Departamento de Qufmica Orgänica, Facultad de Ciencias Qmmicas,Universidad de Concepcion, Casilla 3-C, Concepcion, Chile
| | - G. Fuentes
- Departamento de Qufmica Orgänica, Facultad de Ciencias Qmmicas,Universidad de Concepcion, Casilla 3-C, Concepcion, Chile
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Belmar J, Ortiz L, Quezada J, Parra M, Jiménez CA. Synthesis and Characterization of Phenylene-bis-pyrazolones and Nitrosation Derivatives. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- J. Belmar
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
| | - L. Ortiz
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
| | - J. Quezada
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
| | - M. Parra
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
| | - C. A. Jiménez
- Department of Organic Chemistry, Faculty of Chemical Sciences; University of Concepción; Casilla 160-C Concepción Chile
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Gandomi SK, Parra M, Reeves D, Yap V, Gau CL. Array-CGH is an effective first-tier diagnostic test for EFTUD2-associated congenital mandibulofacial dysostosis with microcephaly. Clin Genet 2013; 87:80-4. [PMID: 24266672 DOI: 10.1111/cge.12328] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/15/2013] [Accepted: 11/21/2013] [Indexed: 12/19/2022]
Abstract
Mandibulofacial dysostosis with microcephaly (MFDM) is a sporadic malformation syndrome with severe craniofacial abnormalities, microcephaly, developmental delay, and dysmorphic features. Most cases of clinically diagnosed MFDM remain genetically unexplained, and to the best of our knowledge a total of 35 patients, 31 different mutations, 4 deletions, and 6 reports have been published. Our proband was born at 36 weeks gestation with microcephaly, microcrania, cleft palate, severe retrognathia, oral and pharyngeal dysphagia, bilateral proximal radioulnar synostosis, 11 thoracic ribs, abnormal magnetic resonance imaging (MRI) findings including simplified gyral pattern and mild dilatation of the posterior bodies of the lateral ventricles secondary to thinning of the white matter, high-pitched cry due to unilateral vocal cord paralysis, and dysmorphic features. Array comparative genomic hybridization (aCGH) + single nucleotide polymorphism (SNP) analysis identified a likely de novo pathogenic deletion on chromosome 17q21.31, encompassing the EFTUD2 gene. Our case represents the fifth reported proband to have MFDM caused by small deletions involving EFTUD2. All known mutations involving EFTUD2 result in genetic haploinsufficiency, consistent with our proband's case as well. Her phenotypic features both overlap and expand on the clinical features of previously reported cases, and her genetic diagnosis also supports the use of aCGH as a first-tier testing option for this disorder.
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Affiliation(s)
- S K Gandomi
- Department of Clinical Diagnostics and Genetic Counseling, Ambry Genetics, Aliso Viejo, CA, USA
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Gandomi SK, Farwell Gonzalez KD, Parra M, Shahmirzadi L, Mancuso J, Pichurin P, Temme R, Dugan S, Zeng W, Tang S. Diagnostic exome sequencing identifies two novel IQSEC2 mutations associated with X-linked intellectual disability with seizures: implications for genetic counseling and clinical diagnosis. J Genet Couns 2013; 23:289-98. [PMID: 24306141 DOI: 10.1007/s10897-013-9671-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 11/04/2013] [Indexed: 10/26/2022]
Abstract
Intellectual disability is a heterogeneous disorder with a wide phenotypic spectrum. Over 1,700 OMIM genes have been associated with this condition, many of which reside on the X-chromosome. The IQSEC2 gene is located on chromosome Xp11.22 and is known to play a significant role in the maintenance and homeostasis of the brain. Mutations in IQSEC2 have been historically associated with nonsyndromic X-linked intellectual disability. Case reports of affected probands show phenotypic overlap with conditions associated with pathogenic MECP2, FOXG1, CDKL5, and MEF2C gene mutations. Affected individuals, however, have also been identified as presenting with additional clinical features including seizures, autistic-behavior, psychiatric problems, and delayed language skills. To our knowledge, only 5 deleterious mutations and 2 intragenic duplications have been previously reported in IQSEC2. Here we report two novel IQSEC2 de novo truncating mutations identified through diagnostic exome sequencing in two severely affected unrelated male probands manifesting developmental delay, seizures, hypotonia, plagiocephaly, and abnormal MRI findings. Overall, diagnostic exome sequencing established a molecular diagnosis for two patients in whom traditional testing methods were uninformative while expanding on the mutational and phenotypic spectrum. In addition, our data suggests that IQSEC2 may be more common than previously appreciated, accounting for approximately 9 % (2/22) of positive findings among patients with seizures referred for diagnostic exome sequencing. Further, these data supports recently published data suggesting that IQSEC2 plays a more significant role in the development of X-linked intellectual disability with seizures than previously anticipated.
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Affiliation(s)
- Stephanie K Gandomi
- Department of Clinical Genomics, Ambry Genetics, 15 Argonaut, Aliso Viejo, CA, 92656, USA,
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Kim W, Tengra FK, Shong J, Marchand N, Chan HK, Young Z, Pangule RC, Parra M, Dordick JS, Plawsky JL, Collins CH. Effect of spaceflight on Pseudomonas aeruginosa final cell density is modulated by nutrient and oxygen availability. BMC Microbiol 2013; 13:241. [PMID: 24192060 PMCID: PMC4228280 DOI: 10.1186/1471-2180-13-241] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [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: 06/04/2013] [Accepted: 10/15/2013] [Indexed: 01/05/2023] Open
Abstract
Background Abundant populations of bacteria have been observed on Mir and the International Space Station. While some experiments have shown that bacteria cultured during spaceflight exhibit a range of potentially troublesome characteristics, including increases in growth, antibiotic resistance and virulence, other studies have shown minimal differences when cells were cultured during spaceflight or on Earth. Although the final cell density of bacteria grown during spaceflight has been reported for several species, we are not yet able to predict how different microorganisms will respond to the microgravity environment. In order to build our understanding of how spaceflight affects bacterial final cell densities, additional studies are needed to determine whether the observed differences are due to varied methods, experimental conditions, or organism specific responses. Results Here, we have explored how phosphate concentration, carbon source, oxygen availability, and motility affect the growth of Pseudomonas aeruginosa in modified artificial urine media during spaceflight. We observed that P. aeruginosa grown during spaceflight exhibited increased final cell density relative to normal gravity controls when low concentrations of phosphate in the media were combined with decreased oxygen availability. In contrast, when the availability of either phosphate or oxygen was increased, no difference in final cell density was observed between spaceflight and normal gravity. Because motility has been suggested to affect how microbes respond to microgravity, we compared the growth of wild-type P. aeruginosa to a ΔmotABCD mutant deficient in swimming motility. However, the final cell densities observed with the motility mutant were consistent with those observed with wild type for all conditions tested. Conclusions These results indicate that differences in bacterial final cell densities observed between spaceflight and normal gravity are due to an interplay between microgravity conditions and the availability of substrates essential for growth. Further, our results suggest that microbes grown under nutrient-limiting conditions are likely to reach higher cell densities under microgravity conditions than they would on Earth. Considering that the majority of bacteria inhabiting spacecrafts and space stations are likely to live under nutrient limitations, our findings highlight the need to explore the impact microgravity and other aspects of the spaceflight environment have on microbial growth and physiology.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Cynthia H Collins
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
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Kim W, Tengra FK, Young Z, Shong J, Marchand N, Chan HK, Pangule RC, Parra M, Dordick JS, Plawsky JL, Collins CH. Spaceflight promotes biofilm formation by Pseudomonas aeruginosa. PLoS One 2013; 8:e62437. [PMID: 23658630 PMCID: PMC3639165 DOI: 10.1371/journal.pone.0062437] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [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: 12/11/2012] [Accepted: 03/20/2013] [Indexed: 01/18/2023] Open
Abstract
Understanding the effects of spaceflight on microbial communities is crucial for the success of long-term, manned space missions. Surface-associated bacterial communities, known as biofilms, were abundant on the Mir space station and continue to be a challenge on the International Space Station. The health and safety hazards linked to the development of biofilms are of particular concern due to the suppression of immune function observed during spaceflight. While planktonic cultures of microbes have indicated that spaceflight can lead to increases in growth and virulence, the effects of spaceflight on biofilm development and physiology remain unclear. To address this issue, Pseudomonas aeruginosa was cultured during two Space Shuttle Atlantis missions: STS-132 and STS-135, and the biofilms formed during spaceflight were characterized. Spaceflight was observed to increase the number of viable cells, biofilm biomass, and thickness relative to normal gravity controls. Moreover, the biofilms formed during spaceflight exhibited a column-and-canopy structure that has not been observed on Earth. The increase in the amount of biofilms and the formation of the novel architecture during spaceflight were observed to be independent of carbon source and phosphate concentrations in the media. However, flagella-driven motility was shown to be essential for the formation of this biofilm architecture during spaceflight. These findings represent the first evidence that spaceflight affects community-level behaviors of bacteria and highlight the importance of understanding how both harmful and beneficial human-microbe interactions may be altered during spaceflight.
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Affiliation(s)
- Wooseong Kim
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
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Honorato M, Fernandez C, Winkler C, Levancini M, Parra M, Troncoso F. M097 FACTORS ASSOCIATED WITH LOW QUALITY OF LIFE IN CLIMACTERIC WOMEN. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61292-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Parra M. I289 IMPACT OF MENOPAUSE ON WOMEN'S HEALTH: A SURVEY FROM DIFFERENT AREAS OF THE WORLD - CHILE. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)60319-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Hill G, Gorman M, Simon S, Frawley L, Whitten K, Wanner L, Parra M, Luce S, Lane L. Effectiveness of Oral Nutritional Supplement Use on Nutritional Status of Community-Dwelling Elderly Receiving Home-Delivered Meals. J Acad Nutr Diet 2012. [DOI: 10.1016/j.jand.2012.06.349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Garrido Puchalt N, Garcia-Velasco JA, Rivera R, Remohi J, Pellicer A, Simoes T, Pinto S, Marques C, Correia S, Pinto G, Figueiredo S, Santillan I, Verdu V, Parra M, Bajo JM, Macedo J, Coca S, Freour T, Dessolle L, Lammers J, Lattes S, Mansour W, Mirallie S, Jean M, Barriere P, Polyzos NP, Blockeel C, Verpoest W, De Vos M, Stoop D, Vloeberghs V, Camus M, Devroey P, Tournaye H. SESSION 20: FEMALE INFERTILITY 2. Hum Reprod 2012. [DOI: 10.1093/humrep/27.s2.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Nicholson WL, Ricco AJ, Agasid E, Beasley C, Diaz-Aguado M, Ehrenfreund P, Friedericks C, Ghassemieh S, Henschke M, Hines JW, Kitts C, Luzzi E, Ly D, Mai N, Mancinelli R, McIntyre M, Minelli G, Neumann M, Parra M, Piccini M, Rasay RM, Ricks R, Santos O, Schooley A, Squires D, Timucin L, Yost B, Young A. The O/OREOS mission: first science data from the Space Environment Survivability of Living Organisms (SESLO) payload. Astrobiology 2011; 11:951-8. [PMID: 22091486 DOI: 10.1089/ast.2011.0714] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We report the first telemetered spaceflight science results from the orbiting Space Environment Survivability of Living Organisms (SESLO) experiment, executed by one of the two 10 cm cube-format payloads aboard the 5.5 kg Organism/Organic Exposure to Orbital Stresses (O/OREOS) free-flying nanosatellite. The O/OREOS spacecraft was launched successfully to a 72° inclination, 650 km Earth orbit on 19 November 2010. This satellite provides access to the radiation environment of space in relatively weak regions of Earth's protective magnetosphere as it passes close to the north and south magnetic poles; the total dose rate is about 15 times that in the orbit of the International Space Station. The SESLO experiment measures the long-term survival, germination, and growth responses, including metabolic activity, of Bacillus subtilis spores exposed to the microgravity, ionizing radiation, and heavy-ion bombardment of its high-inclination orbit. Six microwells containing wild-type (168) and six more containing radiation-sensitive mutant (WN1087) strains of dried B. subtilis spores were rehydrated with nutrient medium after 14 days in space to allow the spores to germinate and grow. Similarly, the same distribution of organisms in a different set of microwells was rehydrated with nutrient medium after 97 days in space. The nutrient medium included the redox dye Alamar blue, which changes color in response to cellular metabolic activity. Three-color transmitted intensity measurements of all microwells were telemetered to Earth within days of each of the 48 h growth experiments. We report here on the evaluation and interpretation of these spaceflight data in comparison to delayed-synchronous laboratory ground control experiments.
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Abalos T, Jiménez D, Moragues M, Royo S, Martínez-Máñez R, Sancenón F, Soto J, Costero AM, Parra M, Gil S. Multi-channel receptors based on thiopyrylium functionalised with macrocyclic receptors for the recognition of transition metal cations and anions. Dalton Trans 2010; 39:3449-59. [PMID: 20333335 DOI: 10.1039/b921486k] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We report herein the synthesis and characterization of a family of ligands containing different cation binding sites covalently connected to a thiopyrylium signalling reporter. The receptors L1-L6 are able to signal the presence of certain metal cations via three different channels; i.e. electrochemically, fluorogenically and chromogenically. An acetonitrile solution of L1-L6 shows a bright blue colour due to a charge-transfer band in the 575-585 nm region. The colour variation in acetonitrile of L1-L6 in the presence of the metal cations Ag+, Cd2+, Cu2+, Fe3+, Hg2+, Ni2+, Pb2+ and Zn2+ has been studied. A selective hypsochromic shift of the blue band was found for the systems L4-Pb2+ and L5-Hg2+. Additionally, L1-L6 are poorly fluorescent but coordination with certain metal cations induces an enhancement of the fluorescence at ca 500 nm. For instance, the presence of Cu2+ and Fe3+ induced a remarkable 42-fold and 45-fold enhancement in the emission intensity of L1 centred at 500 nm, respectively. Also remarkable was the 18-fold enhancement observed for L4 and L5 in the presence of Fe3+ and Cu2+, respectively. The electrochemical behaviour of receptors L1-L6 was studied in acetonitrile using platinum as a working electrode and [Bu4N][BF4] as a supporting electrolyte. This family of receptors showed a one-electron reversible redox process at ca. -0.46 V versus sce attributed to the reduction of the thiopyrylium group. A moderate anodic shift in the presence of certain metal cations was observed. The effect in the UV-visible spectra of acetonitrile solutions of receptor L1-L6 in the presence of anions was also studied. A remarkable bleaching was found in the presence of cyanide.
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Affiliation(s)
- T Abalos
- Instituto de Reconocimiento Molecular y Desarrollo Tecnológico, Centro Mixto Universidad Politécnica de Valencia-Universidad de Valencia, Valencia, Spain
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Cáceres L, Vargas T, Parra M. Study of the variational patterns for corrosion kinetics of carbon steel as a function of dissolved oxygen and NaCl concentration. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.07.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Illanes S, Parra M, Serra R, Pino K, Figueroa-Diesel H, Romero C, Arraztoa JA, Michea L, Soothill PW. Increased free fetal DNA levels in early pregnancy plasma of women who subsequently develop preeclampsia and intrauterine growth restriction. Prenat Diagn 2009; 29:1118-22. [DOI: 10.1002/pd.2372] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jasinska A, Service S, Jawaheer D, DeYoung J, Levinson M, Zhang Z, Kremeyer B, Muller H, Aldana I, Garcia J, Restrepo G, Lopez C, Palacio C, Duque C, Parra M, Vega J, Ortiz D, Bedoya G, Mathews C, Davanzo P, Fournier E, Bejarano J, Ramirez M, Ortiz CA, Araya X, Molina J, Sabatti C, Reus V, Ospina J, Macaya G, Ruiz-Linares A, Freimer N. A narrow and highly significant linkage signal for severe bipolar disorder in the chromosome 5q33 region in Latin American pedigrees. Am J Med Genet B Neuropsychiatr Genet 2009; 150B:998-1006. [PMID: 19319892 PMCID: PMC4815924 DOI: 10.1002/ajmg.b.30956] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We previously reported linkage of bipolar disorder to 5q33-q34 in families from two closely related population isolates, the Central Valley of Costa Rica (CVCR) and Antioquia, Colombia (CO). Here we present follow up results from fine-scale mapping in large CVCR and CO families segregating severe bipolar disorder, BP-I, and in 343 population trios/duos from CVCR and CO. Employing densely spaced SNPs to fine map the prior linkage peak region increases linkage evidence and clarifies the position of the putative BP-I locus. We performed two-point linkage analysis with 1134 SNPs in an approximately 9 Mb region between markers D5S410 and D5S422. Combining pedigrees from CVCR and CO yields a LOD score of 4.9 at SNP rs10035961. Two other SNPs (rs7721142 and rs1422795) within the same 94 kb region also displayed LOD scores greater than 4. This linkage peak coincides with our prior microsatellite results and suggests a narrowed BP-I susceptibility regions in these families. To investigate if the locus implicated in the familial form of BP-I also contributes to disease risk in the population, we followed up the family results with association analysis in duo and trio samples, obtaining signals within 2 Mb of the peak linkage signal in the pedigrees; rs12523547 and rs267015 (P = 0.00004 and 0.00016, respectively) in the CO sample and rs244960 in the CVCR sample and the combined sample, with P = 0.00032 and 0.00016, respectively. It remains unclear whether these association results reflect the same locus contributing to BP susceptibility within the extended pedigrees.
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Affiliation(s)
- A.J. Jasinska
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - S. Service
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - D. Jawaheer
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - J. DeYoung
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - M. Levinson
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - Z. Zhang
- Department of Statistics, University of California, Los Angeles, California
| | - B. Kremeyer
- Galton Laboratory, Department of Biology, University College London, London, United Kingdom
| | - H. Muller
- Galton Laboratory, Department of Biology, University College London, London, United Kingdom
| | - I. Aldana
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - J. Garcia
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - G. Restrepo
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - C. Lopez
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - C. Palacio
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - C. Duque
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - M. Parra
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - J. Vega
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - D. Ortiz
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - G. Bedoya
- Laboratorio de Genetica Molecular, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - C. Mathews
- Department of Psychiatry, University of California, San Francisco, California
| | - P. Davanzo
- Department of Psychiatry and Behavioral Sciences, School of Medicine, University of California, Los Angeles, California
| | - E. Fournier
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - J. Bejarano
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - M. Ramirez
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - C. Araya Ortiz
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - X. Araya
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - J. Molina
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California
| | - C. Sabatti
- Department of Statistics, University of California, Los Angeles, California,Department of Statistics and Department of Human Genetics, University of California, Los Angeles, California
| | - V. Reus
- Department of Psychiatry, University of California, San Francisco, California
| | - J. Ospina
- Departamento de Psiquiatria, Universidad de Antioquia, Medellin, Colombia, South Carolina
| | - G. Macaya
- Cell and Molecular Biology Research Center, Universidad de Costa Rica, San Pedro de Montes de Oca, Costa Rica
| | - A. Ruiz-Linares
- Galton Laboratory, Department of Biology, University College London, London, United Kingdom
| | - N.B. Freimer
- Center for Neurobehavioral Genetics, University of California, Los Angeles, California,Correspondence to: N.B. Freimer, UCLA Center for Neurobehavioral Genetics, Gonda Center, Rm. 3506, 695 Charles E. Young Dr S., Box 951761, Los Angeles, CA 90095.
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Parra M, Martínez-Ruíz J, Tomás V, Martínez-Gutiérrez R, García-Cánovas F, Tudela J. Optimization of the soybean peroxidase catalysed biodegradation of 2,4,6-trichlorophenol. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Martinez-Ruiz J, Parra M, Tomás V, Martinez-Gutiérrez R, García-Canovas F, Tudela J. Biodegradation of 2,4,6-trichlorophenol catalysed by the methylsyringate–laccase mediator system. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jiménez L, Parra M, Tomás V, Martinez-Gutiérrez R, García-Cánovas F, Tudela J. Indigo carmine biodegradation catalysed by soybean peroxidase. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wilson JW, Ott CM, Quick L, Davis R, zu Bentrup KH, Crabbé A, Richter E, Sarker S, Barrila J, Porwollik S, Cheng P, McClelland M, Tsaprailis G, Radabaugh T, Hunt A, Shah M, Nelman-Gonzalez M, Hing S, Parra M, Dumars P, Norwood K, Bober R, Devich J, Ruggles A, CdeBaca A, Narayan S, Benjamin J, Goulart C, Rupert M, Catella L, Schurr MJ, Buchanan K, Morici L, McCracken J, Porter MD, Pierson DL, Smith SM, Mergeay M, Leys N, Stefanyshyn-Piper HM, Gorie D, Nickerson CA. Media ion composition controls regulatory and virulence response of Salmonella in spaceflight. PLoS One 2008; 3:e3923. [PMID: 19079590 PMCID: PMC2592540 DOI: 10.1371/journal.pone.0003923] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2008] [Accepted: 11/03/2008] [Indexed: 12/17/2022] Open
Abstract
The spaceflight environment is relevant to conditions encountered by pathogens during the course of infection and induces novel changes in microbial pathogenesis not observed using conventional methods. It is unclear how microbial cells sense spaceflight-associated changes to their growth environment and orchestrate corresponding changes in molecular and physiological phenotypes relevant to the infection process. Here we report that spaceflight-induced increases in Salmonella virulence are regulated by media ion composition, and that phosphate ion is sufficient to alter related pathogenesis responses in a spaceflight analogue model. Using whole genome microarray and proteomic analyses from two independent Space Shuttle missions, we identified evolutionarily conserved molecular pathways in Salmonella that respond to spaceflight under all media compositions tested. Identification of conserved regulatory paradigms opens new avenues to control microbial responses during the infection process and holds promise to provide an improved understanding of human health and disease on Earth.
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Affiliation(s)
- James W. Wilson
- The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, Arizona, United States of America
- Department of Biology, Villanova University, Villanova, Pennsylvania, United States of America
| | - C. Mark Ott
- Habitability and Environmental Factors Division, NASA-Johnson Space Center, Houston, Texas, United States of America
| | - Laura Quick
- The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, Arizona, United States of America
- Department of Biology, Villanova University, Villanova, Pennsylvania, United States of America
| | - Richard Davis
- The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, Arizona, United States of America
| | | | - Aurélie Crabbé
- The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, Arizona, United States of America
- Flanders Institute of Biotechnology, Free University of Brussels, Brussels, Belgium
- Belgian Nuclear Research Center, Mol, Belgium
| | - Emily Richter
- The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, Arizona, United States of America
| | - Shameema Sarker
- The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, Arizona, United States of America
| | - Jennifer Barrila
- The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, Arizona, United States of America
| | - Steffen Porwollik
- Sidney Kimmel Cancer Center, San Diego, California, United States of America
| | - Pui Cheng
- Sidney Kimmel Cancer Center, San Diego, California, United States of America
| | - Michael McClelland
- Sidney Kimmel Cancer Center, San Diego, California, United States of America
| | - George Tsaprailis
- Center for Toxicology, University of Arizona, Tucson, Arizona, United States of America
| | - Timothy Radabaugh
- Center for Toxicology, University of Arizona, Tucson, Arizona, United States of America
| | - Andrea Hunt
- Center for Toxicology, University of Arizona, Tucson, Arizona, United States of America
| | - Miti Shah
- The Biodesign Institute, Center for Glycoscience Technology, Arizona State University, Tempe, Arizona, United States of America
| | | | - Steve Hing
- NASA-Ames Research Center, Moffett Field, California, United States of America
| | - Macarena Parra
- NASA-Ames Research Center, Moffett Field, California, United States of America
| | - Paula Dumars
- NASA-Ames Research Center, Moffett Field, California, United States of America
| | - Kelly Norwood
- Space Life Sciences Lab, Kennedy Space Center, Cape Canaveral, Florida, United States of America
| | - Ramona Bober
- Space Life Sciences Lab, Kennedy Space Center, Cape Canaveral, Florida, United States of America
| | - Jennifer Devich
- Space Life Sciences Lab, Kennedy Space Center, Cape Canaveral, Florida, United States of America
| | - Ashleigh Ruggles
- Space Life Sciences Lab, Kennedy Space Center, Cape Canaveral, Florida, United States of America
| | - Autumn CdeBaca
- Space Life Sciences Lab, Kennedy Space Center, Cape Canaveral, Florida, United States of America
| | - Satro Narayan
- Space Life Sciences Lab, Kennedy Space Center, Cape Canaveral, Florida, United States of America
| | - Joseph Benjamin
- Space Life Sciences Lab, Kennedy Space Center, Cape Canaveral, Florida, United States of America
| | - Carla Goulart
- BioServe, University of Colorado, Boulder, Colorado, United States of America
| | - Mark Rupert
- BioServe, University of Colorado, Boulder, Colorado, United States of America
| | - Luke Catella
- Space Life Sciences Lab, Kennedy Space Center, Cape Canaveral, Florida, United States of America
| | - Michael J. Schurr
- School of Medicine, University of Colorado Denver, Aurora, Colorado, United States of America
| | - Kent Buchanan
- Oklahoma City University, Oklahoma City, Oklahoma, United States of America
| | - Lisa Morici
- Tulane University Health Sciences Center, New Orleans, Louisiana, United States of America
| | - James McCracken
- Section of General Surgery, University of Chicago, Chicago, Illinois, United States of America
| | - Marc D. Porter
- Departments of Chemistry, Chemical Engineering and Bioengineering, University of Utah, Salt Lake City, Utah, United States of America
| | - Duane L. Pierson
- Habitability and Environmental Factors Division, NASA-Johnson Space Center, Houston, Texas, United States of America
| | - Scott M. Smith
- Human Adaptation and Countermeasures Division, Johnson Space Center, National Aeronautics and Space Administration, Houston, Texas, United States of America
| | - Max Mergeay
- Belgian Nuclear Research Center, Mol, Belgium
| | | | | | - Dominic Gorie
- Astronaut Office, NASA-Johnson Space Center, Houston, Texas, United States of America
| | - Cheryl A. Nickerson
- The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, Tempe, Arizona, United States of America
- * E-mail:
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Wilson JW, Ott CM, zu Bentrup KH, Ramamurthy R, Quick L, Porwollik S, Cheng P, McClelland M, Tsaprailis G, Radabaugh T, Hunt A, Fernandez D, Richter E, Shah M, Kilcoyne M, Joshi L, Nelman-Gonzalez M, Hing S, Parra M, Dumars P, Norwood K, Bober R, Devich J, Ruggles A, Goulart C, Rupert M, Stodieck L, Stafford P, Catella L, Schurr MJ, Buchanan K, Morici L, McCracken J, Allen P, Baker-Coleman C, Hammond T, Vogel J, Nelson R, Pierson DL, Stefanyshyn-Piper HM, Nickerson CA. Space flight alters bacterial gene expression and virulence and reveals a role for global regulator Hfq. Proc Natl Acad Sci U S A 2007; 104:16299-304. [PMID: 17901201 PMCID: PMC2042201 DOI: 10.1073/pnas.0707155104] [Citation(s) in RCA: 276] [Impact Index Per Article: 16.2] [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: 01/02/2023] Open
Abstract
A comprehensive analysis of both the molecular genetic and phenotypic responses of any organism to the space flight environment has never been accomplished because of significant technological and logistical hurdles. Moreover, the effects of space flight on microbial pathogenicity and associated infectious disease risks have not been studied. The bacterial pathogen Salmonella typhimurium was grown aboard Space Shuttle mission STS-115 and compared with identical ground control cultures. Global microarray and proteomic analyses revealed that 167 transcripts and 73 proteins changed expression with the conserved RNA-binding protein Hfq identified as a likely global regulator involved in the response to this environment. Hfq involvement was confirmed with a ground-based microgravity culture model. Space flight samples exhibited enhanced virulence in a murine infection model and extracellular matrix accumulation consistent with a biofilm. Strategies to target Hfq and related regulators could potentially decrease infectious disease risks during space flight missions and provide novel therapeutic options on Earth.
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Affiliation(s)
- J. W. Wilson
- Center for Infectious Diseases and Vaccinology
- Tulane University Health Sciences Center, New Orleans, LA 70112
| | - C. M. Ott
- Habitability and Environmental Factors Division and
| | | | - R. Ramamurthy
- Tulane University Health Sciences Center, New Orleans, LA 70112
| | - L. Quick
- Center for Infectious Diseases and Vaccinology
| | - S. Porwollik
- Sidney Kimmel Cancer Center, San Diego, CA 92121
| | - P. Cheng
- Sidney Kimmel Cancer Center, San Diego, CA 92121
| | | | - G. Tsaprailis
- Center for Toxicology, University of Arizona, Tucson, AZ 85721
| | - T. Radabaugh
- Center for Toxicology, University of Arizona, Tucson, AZ 85721
| | - A. Hunt
- Center for Toxicology, University of Arizona, Tucson, AZ 85721
| | | | - E. Richter
- Center for Infectious Diseases and Vaccinology
| | - M. Shah
- Center for Glycoscience Technology
| | | | - L. Joshi
- Center for Glycoscience Technology
| | | | - S. Hing
- Ames Research Center, National Aeronautics and Space Administration, Moffett Field, CA 94035
| | - M. Parra
- Ames Research Center, National Aeronautics and Space Administration, Moffett Field, CA 94035
| | - P. Dumars
- Ames Research Center, National Aeronautics and Space Administration, Moffett Field, CA 94035
| | - K. Norwood
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - R. Bober
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - J. Devich
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - A. Ruggles
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - C. Goulart
- BioServe, University of Colorado, Boulder, CO 80309
| | - M. Rupert
- BioServe, University of Colorado, Boulder, CO 80309
| | - L. Stodieck
- BioServe, University of Colorado, Boulder, CO 80309
| | | | - L. Catella
- Space Life Sciences Laboratory, Kennedy Space Center, Cape Canaveral, FL 32920
| | - M. J. Schurr
- Tulane University Health Sciences Center, New Orleans, LA 70112
- University of Colorado at Denver and Health Sciences Center, Denver, CO 80262
| | - K. Buchanan
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Oklahoma City University, Oklahoma City, OK 73106
| | - L. Morici
- Tulane University Health Sciences Center, New Orleans, LA 70112
| | - J. McCracken
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Section of General Surgery, University of Chicago, Chicago, IL 60637
| | - P. Allen
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Southeast Louisiana Veterans Health Care System, New Orleans, LA 70112; and
| | - C. Baker-Coleman
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Southeast Louisiana Veterans Health Care System, New Orleans, LA 70112; and
| | - T. Hammond
- Tulane University Health Sciences Center, New Orleans, LA 70112
- Southeast Louisiana Veterans Health Care System, New Orleans, LA 70112; and
| | - J. Vogel
- RNA Biology Group, Max Planck Institute for Infection Biology, 10117 Berlin, Germany
| | - R. Nelson
- Center for Combinatorial Sciences, The Biodesign Institute, Arizona State University, Tempe, AZ 85287
| | | | - H. M. Stefanyshyn-Piper
- Astronaut Office, Johnson Space Center, National Aeronautics and Space Administration, Houston, TX 77058
| | - C. A. Nickerson
- Center for Infectious Diseases and Vaccinology
- Tulane University Health Sciences Center, New Orleans, LA 70112
- To whom correspondence should be addressed at:
The Biodesign Institute, Center for Infectious Diseases and Vaccinology, Arizona State University, 1001 South McAllister Avenue, Tempe, AZ 85287. E-mail:
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Bosco C, Parra M, Barja P, Rodrigo R, Fernández V, Suarez M, Muñoz H. Increased immunohistochemical expression of thrombomodulin at placental perivascular myofibroblast in severe preeclampsia (PE). Histol Histopathol 2006; 20:1045-55. [PMID: 16136486 DOI: 10.14670/hh-20.1045] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The presence of pro-coagulant and anti-coagulant components of the placental vascular endothelium and syncytiotrophoblast are essential for homeostasis. Vascular endothelium prevents blood clot formation in vivo by involving a cell surface thrombin-binding glycoprotein, thrombomodulin (TM), that activates plasma anti-coagulant protein C. The TM levels increase during pregnancy, but the fibrinolytic capacity diminishes. Since vascular lesions with placental coagulation disorders can be associated with preeclampsia (PE), we hypothesized that TM expression in the stem villous vasculature and syncytiotrophoblast of the placenta are impaired in PE. Plasma and placental tissue samples were collected from PE (n=12) and normotensive pregnant patients (n=11). Patient's gestational age was 35.7+/-1.2 (normotensive) and 30.6+/-1.5 weeks (PE). Blood samples were drawn 30 min before delivery. Serum PAI-1 and PAI-2 antigens were determined by enzyme-linked immunoabsorbent assay (ELISA). A monoclonal antibody specific for TM was used for immunohistochemical tissue staining (ABC) and the staining was quantified by semi quantitative scores. Results show no intensity differences at the apical syncytiotrophoblast between the two groups. However, in preeclamptic placenta, TM expression diminished in the endothelium of the stem villi arteries and increased in the perivascular and stromal myofibroblats in cases of severe PE. TM changes were associated with an increased PAI-1/PAI-2 ratio. It is suggested that in severe PE, the decreased placental blood flow may be due to structural and functional impairment of the endothelium of the stem villi vessels and the surrounding perivascular and stromal myofibroblast, by increasing TM expression which may modulate fetal blow flow in the villous tree.
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Affiliation(s)
- C Bosco
- Anatomy and Development Biology Program, Molecular and Clinical Pharmacology Program and Pathology Program, ICBM Faculty of Medicine, University of Chile, Santiago.
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Chang W, Parra M, Centrella M, McCarthy TL. Interactions between CCAAT enhancer binding protein δ and estrogen receptor α control insulin-like growth factor I (igf1) and estrogen receptor-dependent gene expression in osteoblasts. Gene 2005; 345:225-35. [PMID: 15716114 DOI: 10.1016/j.gene.2004.11.017] [Citation(s) in RCA: 22] [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] [Received: 07/08/2004] [Revised: 10/12/2004] [Accepted: 11/17/2004] [Indexed: 11/21/2022]
Abstract
Although ambient levels of estradiol and synthesis of the osteoblast growth factor IGF-I are inversely related in vivo, estradiol has little or no direct effect on igf1 gene expression in rat osteoblasts in vitro. Rather, estradiol suppresses the effect of hormones that enhance igf1 expression through protein kinase A dependent activation of CCAAT enhancer binding protein (C/EBP) transcription factors. We show here that inhibition of C/EBP activity by estradiol relates to the level of estrogen receptor alpha (ERalpha) expression, and that a complex between hormone-activated ERalpha and C/EBPdelta inhibits transcription by each factor. Protein fragmentation, co-immunoprecipitation, and gene expression studies identified domains for physical and functional interactions between ERalpha and C/EBPdelta. Whereas ERalpha and fragments comprising its various domains associated with C/EBPdelta, only ERalpha fragment A/B alone replicated the suppressive effect of intact ERalpha on endogenous C/EBPdelta activity. Complementary studies showed that several carboxyl regions of C/EBPdelta cooperatively inhibit ERalpha dependent transcription. Therefore, multiple domains of C/EBPdelta and ERalpha can physically interact to alter gene expression in osteoblasts in selective ways that depend on variations in the local hormone environment. Their combined effects on one important gene target, igf1, may help to determine the balance in the overall rates of bone formation.
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Affiliation(s)
- Weizhong Chang
- Department of Surgery, Yale University School of Medicine, New Haven, CT 06520-8041, USA
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Vargas-Dĭaz J, Garófalo-Gómez N, Rodríguez U, Parra M, Barroso-García E, Novoa-López L, Rojas-Massipe E, Sardiñas-Hernández NL. [Mondini dysplasia: recurrent bacterial meningitis in adolescence]. Rev Neurol 2004; 39:935-9. [PMID: 15573310] [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: 05/01/2023]
Abstract
INTRODUCTION Episodes of recurrent bacterial meningitis can occur in patients due to either congenital or acquired disorders. Congenital deformity of the bony labyrinth can be linked to a fistulous tract communicating it with the intracranial subarachnoid space. Mondini deformity is a frequent malformation in congenitally deaf patients. CASE REPORT We report the case of an adolescent with a history of being unable to hear in one ear who, from the age of 10 years, began to suffer repeated bacterial meningoencephalitis with microbiological recovery of Streptococcus pneumoniae on three occasions. The type of germ recovered in the cerebrospinal fluid (CSF) and the history of congenital deafness that was detected when the patient was 3 years old were the diagnostic clues to the possible anomaly of the inner ear with a CSF fistula. The clinically proven CSF rhinorrhea contributed to the diagnosis of an ear anomaly with a fistula. Computerised axial tomography and magnetic resonance studies of the petrous portion of the temporal bone revealed the malformation that was later found and closed during the surgical intervention on the affected ear. The clinical absence of rhinorrhea, a year's progression without new infections after operating on the patient and post-surgery imaging studies were all proof that the fistula had closed. CONCLUSIONS Mondini dysplasia with CSF fistula must be included as a possible diagnosis when faced with a patient with recurrent bacterial meningoencephalitis. Imaging studies, especially magnetic resonance, enable the clinician to check the diagnosis and the CSF fistula can be closed with ear surgery.
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Affiliation(s)
- J Vargas-Dĭaz
- Instituto de Neurología y Neurocirugía, Ciudad de La Habana, Cuba.
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Carbonell F, Galán L, Valdés P, Worsley K, Biscay RJ, Díaz-Comas L, Bobes MA, Parra M. Random field-union intersection tests for EEG/MEG imaging. Neuroimage 2004; 22:268-76. [PMID: 15110017 DOI: 10.1016/j.neuroimage.2004.01.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2003] [Revised: 01/15/2004] [Accepted: 01/15/2004] [Indexed: 11/21/2022] Open
Abstract
Electrophysiological (EEG/MEG) imaging challenges statistics by providing two views of the same spatiotemporal data: topographic and tomographic. Until now, statistical tests for these two situations have developed separately. This work introduces statistical tests for assessing simultaneously the significance of spatiotemporal event-related potential/event-related field (ERP/ERF) components and that of their sources. The test for detecting a component at a given time instant is provided by a Hotelling's T(2) statistic. This statistic is constructed in such a manner to be invariant to any choice of reference and is based upon a generalized version of the average reference transform of the data. As a consequence, the proposed test is a generalization of the well-known Global Field Power statistic. Consideration of tests at all time instants leads to a multiple comparison problem addressed by the use of Random Field Theory (RFT). The Union-Intersection (UI) principle is the basis for testing hypotheses about the topographic and tomographic distributions of such ERP/ERF components. The performance of the method is illustrated with actual EEG recordings obtained from a visual experiment of pattern reversal stimuli.
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Affiliation(s)
- F Carbonell
- Departamento de Sistemas Adaptivos, Institute for Cybernetics, Mathematics and Physics, Calle 15, No. 551, e/C y D, Vedado, Havana 4, C.P. 10400, Cuba.
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Vargas Díaz J, Garófalo Gómez N, Rodríguez U, Parra M, Barroso García E, Novoa López L, Rojas Massipe E, Sardiñas Hernández NL. Displasia de Mondini: meningitis bacteriana recurrente en la adolescencia. Rev Neurol 2004. [DOI: 10.33588/rn.3910.2004155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yu CKH, Papageorghiou AT, Parra M, Palma Dias R, Nicolaides KH. Randomized controlled trial using low-dose aspirin in the prevention of pre-eclampsia in women with abnormal uterine artery Doppler at 23 weeks' gestation. Ultrasound Obstet Gynecol 2003; 22:233-239. [PMID: 12942493 DOI: 10.1002/uog.218] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
OBJECTIVE Pre-eclampsia, which is a major cause of perinatal and maternal morbidity and mortality, is thought to be due to impaired perfusion of the placenta. There is contradictory evidence that the administration of low-dose aspirin may provide effective prophylaxis against the subsequent development of pre-eclampsia. In this study we tested the hypothesis that in women identified as being at high-risk for pre-eclampsia, because of impaired flow in the uterine arteries, the prophylactic use of low-dose aspirin from 23 weeks of gestation can reduce the incidence of pre-eclampsia. METHODS We used color and pulsed Doppler to measure the flow in the uterine arteries in 19,950 singleton pregnancies at 22-24 weeks of gestation. Those women exhibiting increased impedance were recruited into a randomized study of aspirin 150 mg per day or placebo. We compared the two groups for the incidence of pre-eclampsia and the other consequences of impaired placentation. RESULTS The screening study identified 844 women (4.2%) as being at high risk of uteroplacental insufficiency. After exclusion and refusal, 560 women were randomly allocated to aspirin 150 mg or placebo per day until 36 weeks' gestation. There were no significant differences between the aspirin and placebo groups in either the incidence of pre-eclampsia (18% vs. 19%, P = 0.6) or pre-eclampsia requiring delivery below 34 weeks (6% vs. 8%, P = 0.36). Furthermore, the administration of aspirin did not significantly alter the incidence of preterm delivery (24% vs. 27%, P = 0.46), birth weight below the 5th centile (22% vs. 24%, P = 0.4), perinatal death (3% vs. 1%, P = 0.33) or placental abruption (4% vs. 2%, P = 0.12). CONCLUSION In pregnancies with impaired placentation, as demonstrated by increased impedance to flow in the uterine arteries, the daily administration of 150 mg aspirin after 23 weeks of gestation does not prevent the subsequent development of pre-eclampsia.
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Affiliation(s)
- C K H Yu
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital Medical School, London, UK
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Albaiges G, Missfelder-Lobos H, Parra M, Lees C, Cooper D, Nicolaides KH. Comparison of color Doppler uterine artery indices in a population at high risk for adverse outcome at 24 weeks' gestation. Ultrasound Obstet Gynecol 2003; 21:170-173. [PMID: 12601841 DOI: 10.1002/uog.30] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
OBJECTIVE To compare uterine artery Doppler velocity and impedance indices in the presence and absence of uterine artery waveform notches, in the prediction of adverse pregnancy outcome in high-risk women. METHODS One hundred and fifty-seven women identified at Doppler screening as being at 'high risk' underwent a further uterine artery Doppler assessment at 24 weeks' gestation. Pulsatility and resistance indices and minimum, time averaged and time averaged maximum velocities were measured, and the presence of bilateral notches noted. Adverse outcomes were pre-eclampsia, birth weight less than the tenth centile, placental abruption and intrauterine death. The best cut-off for each parameter was assessed by univariate logistic regression, and the comparative performance of the screening parameters was assessed using kappa values. RESULTS The best performing index in the presence of bilateral notches was mean resistance index, for a cut-off of 0.67, giving a kappa value of 0.65. Mean pulsatility index and lowest pulsatility index performed similarly well, both with kappa values of 0.58. All velocity indices apart from lowest minimum velocity had kappa values of < 0.4. When indices were analyzed, irrespective of notch status, mean resistance and mean pulsatility indices performed similarly, with kappa values of 0.49 and 0.46, respectively; mean minimum velocity had a kappa value of 0.4. CONCLUSIONS In a high-risk population, uterine artery Doppler mean resistance indices perform better than do velocity indices in the prediction of adverse pregnancy outcome, irrespective of notch status.
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Affiliation(s)
- G Albaiges
- Harris Birthright Centre for Fetal Medicine, King's College Hospital, London, UK
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41
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Chang W, Parra M, Ji C, Liu Y, Eickelberg O, McCarthy TL, Centrella M. Transcriptional and post-transcriptional regulation of transforming growth factor beta type II receptor expression in osteoblasts. Gene 2002; 299:65-77. [PMID: 12459253 DOI: 10.1016/s0378-1119(02)01013-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Variations in transforming growth factor beta (TGF-beta) activity depend on the expression of specific receptors in normal as well as transformed cells. For example, in addition to mutations in TGF-beta type II receptor (TbetaRII) that abrogate normal TGF-beta function, its expression decreases during the transition from replication to extracellular matrix production, or in response to other growth regulators in bone. Therefore, to understand how TbetaRII expression is controlled, we cloned the rat TbetaRII gene promoter and defined basic aspects of its structure and activity. Among several cis-acting elements, mutations within an upstream E-box that specifically binds USF nuclear factors or a downstream Sp1 binding site significantly reduced TbetaRII promoter activity in primary cultures of fetal rat osteoblasts. Treatment with bone morphogenetic protein 2 (BMP-2), which induces further osteoblast differentiation, significantly reduced cell surface TbetaRII. However, BMP-2 did not alter TbetaRII promoter activity, steady state TbetaRII mRNA, or total TbetaRII protein, but caused an intracellular relocation of TbetaRII. Select transcriptional elements thus regulate TbetaRII gene expression, whereas post-translational events controlled by BMP-2 rapidly modify the amount of TbetaRII protein on the bone cell surface. Consequently, several processes can alter functional TbetaRII levels in order to regulate the biological effects of this important growth factor.
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MESH Headings
- Animals
- Base Sequence
- Binding, Competitive
- Bone Morphogenetic Protein 2
- Bone Morphogenetic Proteins/pharmacology
- Cells, Cultured
- Cloning, Molecular
- DNA/chemistry
- DNA/genetics
- DNA-Binding Proteins
- Electrophoretic Mobility Shift Assay
- Gene Expression Regulation/drug effects
- Genes, Reporter/genetics
- Molecular Sequence Data
- Osteoblasts/cytology
- Osteoblasts/metabolism
- Parietal Bone
- Promoter Regions, Genetic/genetics
- Protein Serine-Threonine Kinases
- RNA Processing, Post-Transcriptional/drug effects
- Radioligand Assay
- Rats
- Rats, Sprague-Dawley
- Receptor, Transforming Growth Factor-beta Type II
- Receptors, Transforming Growth Factor beta/genetics
- Receptors, Transforming Growth Factor beta/metabolism
- Regulatory Sequences, Nucleic Acid/genetics
- Sequence Analysis, DNA
- Sequence Homology, Nucleic Acid
- Transcription Factors/genetics
- Transcription Factors/physiology
- Transcription, Genetic/drug effects
- Transfection
- Transforming Growth Factor beta/metabolism
- Transforming Growth Factor beta/pharmacology
- Transforming Growth Factor beta1
- Upstream Stimulatory Factors
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Affiliation(s)
- Weizhong Chang
- Department of Surgery (Plastic Surgery Section), Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06520-8041, USA
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Gimenez C, Diaz E, Rosado F, Garcia-Ferrer A, Sanchez M, Parra M, Díaz M, Peña F. CHARACTERIZATION OF CURRENT MANAGEMENT PRACTICES WITH HIGH RISK OF NITRATE CONTAMINATION IN AGRICULTURAL AREAS OF SOUTHERN SPAIN. ACTA ACUST UNITED AC 2001. [DOI: 10.17660/actahortic.2001.563.8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Parra M, Jardí M, Koziczak M, Nagamine Y, Muñoz-Cánoves P. p53 Phosphorylation at serine 15 is required for transcriptional induction of the plasminogen activator inhibitor-1 (PAI-1) gene by the alkylating agent N-methyl-N'-nitro-N-nitrosoguanidine. J Biol Chem 2001; 276:36303-10. [PMID: 11470783 DOI: 10.1074/jbc.m103735200] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The alkylating agent N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) is a widely spread environmental carcinogen that causes DNA lesions leading to cell killing. MNNG can also induce a cell-protective response by inducing the expression of DNA repair/transcription-related genes. We recently demonstrated that urokinase-type plasminogen activator, an extracellular protease to which no DNA repair functions have been assigned, was induced by MNNG. Here, we show that the physiological inhibitor of urokinase-type plasminogen activator, PAI-1, is also induced by MNNG in a p53-dependent fashion, because MNNG induced PAI-1 in p53-expressing cells but not in p53-/- cells. MNNG induced p53 phosphorylation at serine 15, resulting in stabilization of the p53 protein, and this phosphorylation event was central for p53-dependent PAI-1 transcription. Finally, we showed that PAI-1 transcriptional induction by MNNG required a p53-responsive element located at -136 base pairs in the PAI-1 promoter, because specific mutation of this site abrogated the induction. Because PAI-1 is a prognostic factor in many metastatic cancers, being involved in the control of tumor invasiveness, our finding that a genotoxic agent induces the PAI-1 gene via p53 adds a new feature to the role of the tumor-suppressor p53 protein. Our results also suggest the possibility that genotoxic agents contribute to tumor metastasis by inducing PAI-1 without involving genetic modification.
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Affiliation(s)
- M Parra
- Institut de Recerca Oncologica, Center d'Oncologia Molecular, Aut. Castelldefels, km 2.7, L'Hospitalet Ll., E-08907 Barcelona, Spain
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Lees C, Parra M, Missfelder-Lobos H, Morgans A, Fletcher O, Nicolaides KH. Individualized risk assessment for adverse pregnancy outcome by uterine artery Doppler at 23 weeks. Obstet Gynecol 2001; 98:369-73. [PMID: 11530114 DOI: 10.1016/s0029-7844(01)01474-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To provide individualized risk prediction of severe adverse pregnancy outcome based on uterine artery Doppler screening at 23 weeks. METHODS Color Doppler assessment of the uterine arteries was carried out in 5121 women attending for routine care at 23 weeks in two inner-city obstetric units. The mean uterine artery pulsatility index (PI) was calculated, and the likelihood ratios in relation to PI were generated for severe adverse outcome. This was defined as fetal death, placental abruption, and delivery before 34 weeks associated with preeclampsia and birth weight less than the 10th centile. RESULTS The likelihood of severe adverse pregnancy outcome increased quadratically with mean uterine artery PI. This relationship was not affected by maternal age, ethnicity, or parity. At a mean PI of 1.45, the 95th centile for our population, the likelihood ratio for severe adverse pregnancy outcome was 5. Cigarette smoking had an additional contribution to PI in predicting severe adverse outcome, roughly doubling the risk for a given PI. CONCLUSION The individualized risk of severe adverse pregnancy outcome can be determined by uterine artery Doppler screening at 23 weeks and knowledge of cigarette smoking history. Such individualized risk would allow ultrasound resources and clinical follow-up to be tailored to the pregnant woman for the most appropriate use of antenatal care.
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Affiliation(s)
- C Lees
- Harris Birthright Unit, King's College Hospital, London, United Kingdom.
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Lluís F, Roma J, Suelves M, Parra M, Aniorte G, Gallardo E, Illa I, Rodríguez L, Hughes SM, Carmeliet P, Roig M, Muñoz-Cánoves P. Urokinase-dependent plasminogen activation is required for efficient skeletal muscle regeneration in vivo. Blood 2001; 97:1703-11. [PMID: 11238111 DOI: 10.1182/blood.v97.6.1703] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Plasminogen activators urokinase-type plasminogen activator (uPA) and tissue-type plasminogen activator (tPA) are extracellular proteases involved in various tissue remodeling processes. A requirement for uPA activity in skeletal myogenesis was recently demonstrated in vitro. The role of plasminogen activators in skeletal muscle regeneration in vivo in wild-type, uPA-deficient, and tPA-deficient mice is investigated here. Wild-type and tPA-/- mice completely repaired experimentally damaged skeletal muscle. In contrast, uPA-/- mice had a severe regeneration defect, with decreased recruitment of blood-derived monocytes to the site of injury and with persistent myotube degeneration. In addition, uPA-deficient mice accumulated fibrin in the degenerating muscle fibers; however, the defibrinogenation of uPA-deficient mice resulted in a correction of the muscle regeneration defect. A similar severe regeneration deficit with persistent fibrin deposition was also reproducible in plasminogen-deficient mice after injury, suggesting that fibrinolysis by uPA-mediated plasminogen activation plays a fundamental role in skeletal muscle regeneration. In conclusion, the uPA-plasmin system is identified as a critical component of the mammalian skeletal muscle regeneration process, possibly because it prevents intramuscular fibrin accumulation and contributes to the adequate inflammatory response after injury. These studies demonstrate the requirement of an extracellular proteolytic cascade during muscle regeneration in vivo.
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Affiliation(s)
- F Lluís
- Centre d'Oncologia Molecular, Institut de Recerca Oncològica, Barcelona, Spain
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Gil S, Lázaro MA, Parra M, Breitmaier E, Mestres R. γ-Alkylation of Unsaturated Carboxylic Acids. Stereoselective Synthesis of 2Z- and 2E,6E-3-Methyldeca-2,6-dienoic Acids from 3-Methylbut-2-enoic Acid Through Consecutive Ireland Claisen and Cope Rearrangements. Synlett 2000. [DOI: 10.1055/s-1998-1565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Albaiges G, Missfelder-Lobos H, Lees C, Parra M, Nicolaides KH. One-stage screening for pregnancy complications by color Doppler assessment of the uterine arteries at 23 weeks' gestation. Obstet Gynecol 2000; 96:559-64. [PMID: 11004359 DOI: 10.1016/s0029-7844(00)00946-7] [Citation(s) in RCA: 152] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To estimate the value of screening for preeclampsia and fetal growth restriction by performing color Doppler assessment of uterine arteries at 23 weeks' gestation in predicting adverse pregnancy outcome. METHODS Women with singleton pregnancies who attended routine ultrasonography at 23 weeks had color Doppler uterine artery imaging. Bilateral uterine artery notches were noted and left and right uterine artery pulsatility indices (PI) were measured. A mean PI of more than 1.45 was considered increased. Screening characteristics for predicting preeclampsia and delivery of small-for-gestational-age infants were calculated. RESULTS Of 1757 pregnancies, increased PI was present in 89 (5.1%) and bilateral notches were noted in 77 (4.4%). Twenty-three of 65 women (35.3%; 95% confidence interval [CI] 23.9, 48.2) had increased PI and later developed preeclampsia, and 8 of 10 (80%; 95% CI 44.4, 97. 5) with preeclampsia required delivery before 34 weeks. The respective values for women with bilateral notches were 21 of 65 (32. 3%; 95% CI 21.2, 45.1) and 8 of 10 (80%; 95% CI 44.4, 97.5). The sensitivity of increased PI was 30 of 143 (21%; 95% CI 14.6, 28.6) for delivery of an infant with birth weight below the tenth percentile and 7 of 10 (70% 95% CI 34.8,93.3) for birth weight below the tenth percentile delivered before 34 weeks. The respective values for bilateral notches were 19 of 143 (13.3%; 95% CI 8.2, 20) and 5 of 10 (50%; 95% CI 18.7, 81.3). CONCLUSION A one-stage color Doppler screening program at 23 weeks identified most women who subsequently developed serious complications of impaired placentation associated with delivery before 34 weeks. The screening results were similar when the high-risk group was defined as women with increased PI or bilateral notches.
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Affiliation(s)
- G Albaiges
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, United Kingdom
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49
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Parra M, Lluís F, Miralles F, Caelles C, Muñoz-Cánoves P. The cJun N-terminal kinase (JNK) signaling pathway mediates induction of urokinase-type plasminogen activator (uPA) by the alkylating agent MNNG. Blood 2000; 96:1415-24. [PMID: 10942386] [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: 02/17/2023] Open
Abstract
The monofunctional alkylating agent N-methyl-N-nitro-N-nitrosoguanidine (MNNG) is a widespread environmental carcinogen that causes DNA lesions, leading to cell death. However, MNNG can also trigger a cell-protective response by inducing the expression of DNA repair/transcription-related genes. We demonstrate that the urokinase-type plasminogen activator (uPA) gene product, a broad spectrum extracellular protease to which no DNA repair function has been assigned, is transcriptionally induced by MNNG in C2C12 and NIH3T3 cells. This induction required an AP1-enhancer element located at -2.4 kilobase (kb), because it was abrogated by deletion of this site. MNNG was found to induce the activation of JNK/SAPK and p38 mitogen-activated protein kinases (MAPKs). Accordingly, we attempted to assess the contribution of each of these MNNG-inducible MAPKs to uPA gene induction by this alkylating agent. Coexpression of dominant negative versions of kinases of the JNK pathway, such as catalytically inactive forms of MEKK1, MKK7, and JNKK, and of cytoplasmic JNK-inhibitor JIP-1, as well as treatment of cells with curcumin (which blocks JNK activation by MNNG), inhibited MNNG-induced uPA transcriptional activity. In contrast, neither dominant negative MKK6 nor SB203580, which specifically inhibit p38 MAP kinase activation, abrogated the MNNG-induced effect. Taken together, our results show that the JNK signaling pathway links external MNNG stimulation and AP1-dependent uPA gene expression, providing the first functional dissection of a transcription-coupled signal transduction pathway for MNNG. (Blood. 2000;96:1415-1424)
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Affiliation(s)
- M Parra
- Departament de Oncològia Molecular, Institut de Recerca Oncològica (IRO), Barcelona, Spain
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50
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Nunomura W, Takakuwa Y, Parra M, Conboy J, Mohandas N. Regulation of protein 4.1R, p55, and glycophorin C ternary complex in human erythrocyte membrane. J Biol Chem 2000; 275:24540-6. [PMID: 10831591 DOI: 10.1074/jbc.m002492200] [Citation(s) in RCA: 74] [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: 12/27/2022] Open
Abstract
Three binary protein-protein interactions, glycophorin C (GPC)-4.1R, GPC-p55, and p55-4.1R, constitute the GPC-4.1R-p55 ternary complex in the erythrocyte membrane. Little is known regarding the molecular basis for the interaction of 4.1R with either GPC or p55 and regarding the role of 4.1R in regulating the various protein-protein interactions that constitute the GPC-4.1R-p55 ternary complex. In the present study, we present evidence that sequences in the 30-kDa domain encoded by exon 8 and exon 10 of 4.1R constitute the binding interfaces for GPC and p55, respectively. We further show that 4.1R increases the affinity of p55 binding to GPC by an order of magnitude, implying that 4.1R modulates the interaction between p55 and GPC. Finally, we document that binding of calmodulin to 4.1R decreases the affinity of 4.1R interactions with both p55 and GPC in a Ca(2+)-dependent manner, implying that the GPC-4.1R-p55 ternary protein complex can undergo dynamic regulation in the erythrocyte membrane. Taken together, these findings have enabled us to identify an important role for 4.1R in regulating the GPC-4.1R-p55 ternary complex in the erythrocyte membrane.
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Affiliation(s)
- W Nunomura
- Department of Biochemistry, School of Medicine, Tokyo Women's Medical University, Shinjuku, Tokyo 162-8666, Japan
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