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Hrubovčák J, Dudík I, Voves J, Roman J, Jalůvka F, Jelínek P, Slívová I, Tesař M, Vávra P, Tulinský L. Latex and silicone drains in surgery − is the ban on rubber drains really a step forward or rather a step back? Rozhl Chir 2023; 101:525-529. [PMID: 36717259 DOI: 10.33699/pis.2022.101.11.525-529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The use of silicone and latex drains is an integral part of surgical practice. Experience and the review of the world literature show that silicone drain is characterized by a much lower rate of fibrotic reaction of the tissue around the drain. The ability of a latex, or rubber, or popularly called rubber drain, to induce the formation of ligaments in its surroundings is advantageously used in situations where the targeted formation of scar tissue is desired. This feature is absent in silicone drains. However, nowadays the rule in most surgical departments is to use almost exclusively silicone drains, which is based on prevention of latex allergy. This article is devoted to the description of the different and mutually irreplaceable use of silicone and latex drains. Subsequently, he also discusses the question of whether the twilight of the use of latex drains in modern medicine is really progress, or rather retrogression.
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Sandoval E, Moreno-Castaño A, Pino M, Pereda D, Samanbar S, Pruna-Guillen R, Fernandez S, Roman J, Gomez V, Muro A, Castro P, Escolar G, Diaz-Ricart M. Primary Hemostasis Defect Due to Acquired Von Willebrand Disease and Platelet Activation During Extracorporeal Life Support. In Vitro Correction by Purified VWF. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Xu T, Lizarralde-Iragorri MA, Roman J, Martincic E, Brousse V, Nemer WE, Francais O, Pioufle BL. Reusable Device for the Electrical Sensing of Red Blood Cells Rigidity Abnormalities, Based on A Reversible Microfluidic Assembly . Annu Int Conf IEEE Eng Med Biol Soc 2021; 2021:1168-1171. [PMID: 34891495 DOI: 10.1109/embc46164.2021.9630178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Combining microfluidic with sensors enables the development of smart analysis systems. Microelectrodes can be embedded within the microchannels network for electrical sensing, electrochemical analysis or impedance measurement. However, at the laboratory scale, the assembly between microfluidic network and electrical parts on the substrate remains an issue. This paper first discusses the principles of biosensing, and then proposes an original device integrating microfluidics with microelectrodes for the analysis of red blood cells transit in a structure mimicking micro-vascular flow. Some results concerning red blood cells discrimination of sickle cell disease are discussed with statistical analysis.Clinical relevance- This paper introduces a portable reusable device combining a microfluidic blood vessel mimicking network with microelectrodes for the biosensing of RBC.
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Fujinami Tanimoto IM, Cressiot B, Jarroux N, Roman J, Patriarche G, Le Pioufle B, Pelta J, Bacri L. Selective target protein detection using a decorated nanopore into a microfluidic device. Biosens Bioelectron 2021; 183:113195. [PMID: 33857755 DOI: 10.1016/j.bios.2021.113195] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/19/2021] [Accepted: 03/20/2021] [Indexed: 10/21/2022]
Abstract
Solid-state nanopores provide a powerful tool to electrically analyze nanoparticles and biomolecules at single-molecule resolution. These biosensors need to have a controlled surface to provide information about the analyte. Specific detection remains limited due to nonspecific interactions between the molecules and the nanopore. Here, a polymer surface modification to passivate the membrane is performed. This functionalization improves nanopore stability and ionic conduction. Moreover, one can control the nanopore diameter and the specific interactions between protein and pore surface. The effect of ionic strength and pH are probed. Which enables control of the electroosmotic driving force and dynamics. Furthermore, a study of polymer chain structure and permeability in the pore are carried out. The nanopore chip is integrated into a microfluidic device to ease its handling. Finally, a discussion of an ionic conductance model through a permeable crown along the nanopore surface is elucidated. The proof of concept is demonstrated by the capture of free streptavidin by the biotins grafted into the nanopore. In the future, this approach could be used for virus diagnostic, nanoparticle or biomarker sensing.
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Affiliation(s)
- Izadora Mayumi Fujinami Tanimoto
- Université Paris-Saclay, Univ Evry, CNRS, LAMBE, 91025, Evry-Courcouronnes, France; Université Paris-Saclay, ENS Paris-Saclay, CNRS, LuMIn, Institut d'Alembert, 91190, Gif-sur-Yvette, France
| | | | - Nathalie Jarroux
- Université Paris-Saclay, Univ Evry, CNRS, LAMBE, 91025, Evry-Courcouronnes, France
| | - Jean Roman
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, LuMIn, Institut d'Alembert, 91190, Gif-sur-Yvette, France
| | - Gilles Patriarche
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120, Palaiseau, France
| | - Bruno Le Pioufle
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, LuMIn, Institut d'Alembert, 91190, Gif-sur-Yvette, France.
| | - Juan Pelta
- Université Paris-Saclay, Univ Evry, CNRS, LAMBE, 91025, Evry-Courcouronnes, France.
| | - Laurent Bacri
- Université Paris-Saclay, Univ Evry, CNRS, LAMBE, 91025, Evry-Courcouronnes, France.
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Donoso R, Margozzini P, Roman J. [Characterization and risk of fracture in Chile's adult population. A new look at ENS 2009-2010]. Acta Ortop Mex 2020; 34:346-353. [PMID: 34020512] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
INTRODUCTION Fractures are relevant injuries in the lives of individuals both for the cost of treatment and for the burden on working life. The information in our country about this pathology is scarce, so we set out to review epidemiological data available in the national health survey. MATERIAL AND METHODS The prevalence of fracture life was calculated for the entire sample and for adults over 55 years of age, with different logistic regression models estimated by sex for the likelihood of a fracture in life. RESULTS The prevalence of fracture life is 18%, with 25.1% for adults over 55 years of age, with higher prevalence observed in men than in women (22.5% and 13.8% respectively). In the male sex it was associated with fractures: age, smoking, physical activity, alcohol consumption, and BMI, while in the female sex it was associated: age, polypharmacy, marital status, and physical activity. CONCLUSION An association was found between the occurrence of fractures and multiple known risk factors for chronic diseases, highlighting the relevance of fractures in the population. New evidence aimed at studying this phenomenon becomes imperative given the progressive ageing of the Chilean population.
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Affiliation(s)
- R Donoso
- Facultad de Medicina de la Pontificia Universidad Católica de Chile. Chile
| | - P Margozzini
- Departamento de Salud Pública. Facultad de Medicina de la Pontificia Universidad Católica de Chile. Chile
| | - J Roman
- Departamento de Traumatología y Ortopedia. Facultad de Medicina de la Pontificia Universidad Católica de Chile. Chile
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Xu T, Lizarralde-Iragorri MA, Roman J, Ghasemi R, Lefèvre JP, Martincic E, Brousse V, Français O, El Nemer W, Le Pioufle B. Characterization of red blood cell microcirculatory parameters using a bioimpedance microfluidic device. Sci Rep 2020; 10:9869. [PMID: 32555353 PMCID: PMC7299978 DOI: 10.1038/s41598-020-66693-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 05/26/2020] [Indexed: 02/07/2023] Open
Abstract
This paper describes the use of a microfluidic device comprising channels with dimensions mimicking those of the smallest capillaries found in the human microcirculation. The device structure, associated with a pair of microelectrodes, provides a tool to electrically measure the transit time of red blood cells through fine capillaries and thus generate an electrical signature for red blood cells in the context of human erythroid genetic disorders, such as sickle cell disease or hereditary spherocytosis, in which red cell elasticity is altered. Red blood cells from healthy individuals, heated or not, and red blood cells from patients with sickle cell disease or hereditary spherocytosis where characterized at a single cell level using our device. Transit time and blockade amplitude recordings were correlated with microscopic observations, and analyzed. The link between the electrical signature and the mechanical properties of the red blood cells is discussed in the paper, with greater transit time and modified blockade amplitude for heated and pathological red blood cells as compared to those from healthy individuals. Our single cell-based methodology offers a new and complementary approach to characterize red cell mechanical properties in human disorders under flow conditions mimicking the microcirculation.
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Affiliation(s)
- Tieying Xu
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, Institut d'Alembert, SATIE, F-91190, Gif sur Yvette, France
| | - Maria A Lizarralde-Iragorri
- Université de Paris, UMR_S1134, BIGR, Inserm, F-75015, Paris, France
- Institut National de Transfusion Sanguine, F-75015, Paris, France
- Laboratoire d'Excellence GR-Ex, F-75013, Paris, France
| | - Jean Roman
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, Institut d'Alembert, SATIE, F-91190, Gif sur Yvette, France
| | - Rasta Ghasemi
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, Institut d'Alembert, F-91190, Gif sur Yvette, France
| | - Jean-Pierre Lefèvre
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, PPSM, Institut d'Alembert, F-91190, Gif sur Yvette, France
- CNAM, F-75003, Paris, France
| | - Emile Martincic
- Centre de Nanosciences et de Nanotechnologies C2N, CNRS, Université Paris-Sud, Université Paris-Saclay, F-91120, Palaiseau, France
| | - Valentine Brousse
- Université de Paris, UMR_S1134, BIGR, Inserm, F-75015, Paris, France
- Institut National de Transfusion Sanguine, F-75015, Paris, France
- Laboratoire d'Excellence GR-Ex, F-75013, Paris, France
- Service de Pédiatrie Générale et Maladies Infectieuses, Hôpital Universitaire Necker Enfants Malades, F-75015, Paris, France
| | - Olivier Français
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, Institut d'Alembert, SATIE, F-91190, Gif sur Yvette, France
- ESYCOM, Univ Gustave Eiffel, CNRS UMR 9007, ESIEE Paris, F-77454, Marne-la-Vallee, France
| | - Wassim El Nemer
- Université de Paris, UMR_S1134, BIGR, Inserm, F-75015, Paris, France
- Institut National de Transfusion Sanguine, F-75015, Paris, France
- Laboratoire d'Excellence GR-Ex, F-75013, Paris, France
| | - Bruno Le Pioufle
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, Institut d'Alembert, SATIE, F-91190, Gif sur Yvette, France.
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, Institut d'Alembert, LUMIN, F-91190, Gif sur Yvette, France.
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Gualdoni J, Ritzenthaler J, Burlen J, Stocker A, Abell T, Roman J, Nunley DR. Gastroesophageal Reflux and Microaspiration in Lung Transplant Recipients: The Utility of a Single Esophageal Manometry and pH Probe Monitoring Study. Transplant Proc 2020; 52:977-981. [PMID: 32151388 DOI: 10.1016/j.transproceed.2020.01.019] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 01/23/2020] [Indexed: 11/18/2022]
Abstract
BACKGROUND Gastroesophageal reflux (GER) in recipients of lung transplant (LTX) is associated with chronic allograft rejection, presumably via microaspiration that damages airway epithelium. Most LTX programs perform a single post-LTX esophageal study to evaluate for GER; the efficacy of this test is unclear. METHODS Patients with 1 year of post-LTX follow-up, including routine bronchoscopies with bronchoalveolar lavage fluid (BALF) samples as well as high-resolution esophageal manometry and pH probe monitoring (HREMpH), were evaluated. BALF samples were analyzed with competitive enzyme-linked immunosorbent assay to detect bile salts, which are indicative of aspiration. These results were compared to results of HREMpH studies post LTX. RESULTS Ninety BALF samples were analyzed for bile salts and acted as disease positive for this evaluation. Of the 13 HREMpH cases, 8 were positive for GER, but only 3 were positive for bile salts via assay. Of the 5 HREMpH-negative cases, 2 experienced aspiration. A solitary HREMpH study had 60.0% sensitivity and 37.5% specificity with positive and negative likelihood ratios: 0.96 and 1.07, respectively. CONCLUSION Microaspiration appears to be an intermittent phenomenon, and HREMpH screening poorly correlates with BALF evidence of aspiration; which may not be adequate. As aspiration detection is crucial in this population, further analysis is warranted.
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Affiliation(s)
- J Gualdoni
- Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky, United States.
| | - J Ritzenthaler
- Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky, United States
| | - J Burlen
- Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky, United States
| | - A Stocker
- Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky, United States
| | - T Abell
- Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky, United States
| | - J Roman
- Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky, United States; Robley Rex VA Medical Center, Louisville, Kentucky, United States
| | - D R Nunley
- Department of Medicine, University of Louisville School of Medicine, Louisville, Kentucky, United States
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Roman J, Vávra P, Ekrtová T, Skácelíková E, Ihnát P, Papalová M, Řehořková S, Cvek J. Comparison of surgical intervention to Cyberknife® radiotherapy in the treatment of liver malignancies. Rozhl Chir 2019; 98:408-413. [PMID: 31842571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
INTRODUCTION Surgical resection is the method of choice in treating liver malignancies. In patients who are not suitable for radical surgical treatment, the radiotherapeutic system Cyberknife® is a viable treatment option. The aim of this study is to compare short- and long-term results of both treatment methods. METHODS A retrospective analysis of prospectively collected data was performed, focused on patients undergoing treatment of liver malignancies either by surgical resection or by the Cyberknife® system from 2013 to 2016. Only patients treated using a single treatment method were included in the study. RESULTS A total of 260 patients were analysed; 142 were treated by performing surgical resection and the remaining 118 using Cyberknife® radiotherapy. Median survival was 30.65 months for the surgical resection and 22.93 for the Cyberknife® therapy; median overall survival was 27.63 months. Three-year cumulative survival was 47.4% for the resection and 19.9% for radiotherapy. Kaplan-Meier analysis did not demonstrate a statistically significant difference in disease-specific survival between both groups (p=0.082, CI 95%). Results limited only to colorectal liver metastases showed a statistically significant difference in disease-specific survival (p=0.031, CI 95%). CONCLUSIONS Results of this study show statistically indifferent overall disease-specific survival of both groups. However, the significant difference in 3-year survival still indicates a predominant position of surgery in the diagnostic and therapeutic management of patients with liver malignancies. Nevertheless, Cyberknife® radiotherapy may actually represent a viable treatment alternative, particularly in patients unable to undergo surgical resection, although a longer follow-up period is necessary to obtain more robust results.
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Roman J, Français O, Jarroux N, Patriarche G, Pelta J, Bacri L, Le Pioufle B. Solid-State Nanopore Easy Chip Integration in a Cheap and Reusable Microfluidic Device for Ion Transport and Polymer Conformation Sensing. ACS Sens 2018; 3:2129-2137. [PMID: 30284814 DOI: 10.1021/acssensors.8b00700] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Solid-state nanopores have a huge potential in upcoming societal challenging applications in biotechnologies, environment, health, and energy. Nowadays, these sensors are often used within bulky fluidic devices that can cause cross-contaminations and risky nanopore chips manipulations, leading to a short experimental lifetime. We describe the easy, fast, and cheap innovative 3D-printer-helped protocol to manufacture a microfluidic device permitting the reversible integration of a silicon based chip containing a single nanopore. We show the relevance of the shape of the obtained channels thanks to finite elements simulations. We use this device to thoroughly investigate the ionic transport through the solid-state nanopore as a function of applied voltage, salt nature, and concentration. Furthermore, its reliability is proved through the characterization of a polymer-based model of protein-urea interactions on the nanometric scale thanks to a hairy nanopore.
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Affiliation(s)
- Jean Roman
- ENS Paris-Saclay, CNRS, Institut d’Alembert, SATIE, Université Paris-Saclay, Cachan F-94230, France
- LAMBE, Université Evry, CNRS, CEA, Université Paris-Saclay, Evry F-91025, France
| | - Olivier Français
- ESIEE-Paris, ESYCOM, Université Paris Est, Noisy-Le-Grand F-93160, France
| | - Nathalie Jarroux
- LAMBE, Université Evry, CNRS, CEA, Université Paris-Saclay, Evry F-91025, France
| | - Gilles Patriarche
- C2N, CNRS, Université Paris-Sud, Université Paris-Saclay, C2N-Marcoussis, Marcoussis F-91460, France
| | - Juan Pelta
- LAMBE, Université Evry, CNRS, CEA, Université Paris-Saclay, Evry F-91025, France
| | - Laurent Bacri
- LAMBE, Université Evry, CNRS, CEA, Université Paris-Saclay, Evry F-91025, France
| | - Bruno Le Pioufle
- ENS Paris-Saclay, CNRS, Institut d’Alembert, SATIE, Université Paris-Saclay, Cachan F-94230, France
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Roman J, Le Pioufle B, Auvray L, Pelta J, Bacri L. From current trace to the understanding of confined media. Eur Phys J E Soft Matter 2018; 41:99. [PMID: 30159758 DOI: 10.1140/epje/i2018-11709-5] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 07/30/2018] [Indexed: 06/08/2023]
Abstract
Nanopores constitute devices for the sensing of nano-objects such as ions, polymer chains, proteins or nanoparticles. We describe what information we can extract from the current trace. We consider the entrance of polydisperse chains into the nanopore, which leads to a conductance drop. We describe the detection of these current blockades according to their shape. Finally, we explain how data analysis can be used to enhance our understanding of physical processes in confined media.
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Affiliation(s)
- Jean Roman
- LAMBE, Univ Evry, CNRS, CEA, Université Paris-Saclay, F-91025, Evry, France
| | - Bruno Le Pioufle
- ENS Paris-Saclay, CNRS, Institut d'Alembert, SATIE, Université Paris-Saclay, F-94230, Cachan, France
| | - Loïc Auvray
- Matière et Systèmes Complexes, Université Paris Diderot/CNRS (UMR 7057), 75205, Paris, Cedex 13, France
| | - Juan Pelta
- LAMBE, Univ Evry, CNRS, CEA, Université Paris-Saclay, F-91025, Evry, France
| | - Laurent Bacri
- LAMBE, Univ Evry, CNRS, CEA, Université Paris-Saclay, F-91025, Evry, France.
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Roman J, Jarroux N, Patriarche G, Français O, Pelta J, Le Pioufle B, Bacri L. Functionalized Solid-State Nanopore Integrated in a Reusable Microfluidic Device for a Better Stability and Nanoparticle Detection. ACS Appl Mater Interfaces 2017; 9:41634-41640. [PMID: 29144721 DOI: 10.1021/acsami.7b14717] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Electrical detection based on single nanopores is an efficient tool to detect biomolecules, particles and study their morphology. Nevertheless the surface of the solid-state membrane supporting the nanopore should be better controlled. Moreover, nanopore should be integrated within microfluidic architecture to facilitate control fluid exchanges. We built a reusable microfluidic system integrating a decorated membran, rendering the drain and refill of analytes and buffers easier. This process enhances strongly ionic conductance of the nanopore and its lifetime. We highlight the reliability of this device by detecting gold nanorods and spherical proteins.
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Affiliation(s)
- Jean Roman
- LAMBE, Université Evry, CNRS, CEA, Université Paris-Saclay , Evry F-91025, France
| | - Nathalie Jarroux
- LAMBE, Université Evry, CNRS, CEA, Université Paris-Saclay , Evry F-91025, France
| | - Gilles Patriarche
- Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Sud, Université Paris-Saclay, C2N-Marcoussis , Marcoussis 91460, France
| | - Olivier Français
- ESIEE-Paris, ESYCOM, University Paris Est , Cité Descartes BP99, Noisy-Le-Grand F-93160, France
| | - Juan Pelta
- LAMBE, Université Evry, CNRS, CEA, Université Paris-Saclay , Evry F-91025, France
| | | | - Laurent Bacri
- LAMBE, Université Evry, CNRS, CEA, Université Paris-Saclay , Evry F-91025, France
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Danson S, Woll P, Edwards J, Blyth K, Fisher P, Roman J, Simpson K, Spavin R, Learmonth K, Conner J. Oncolytic herpesvirus therapy for mesothelioma: A phase I/IIa trial of intrapleural administration of HSV1716 (NCT01721018). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx367.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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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Bjermer L, Gauvreau G, Postma D, O’Byrne P, Berge MVD, Boulet LP, Beckman O, Persson T, Roman J, Carlholm M, Schutzer KM, Eckerwall G. P134 Methacholine challenge to demonstrate therapeutic equivalence of terbutaline via different turbuhaler devices in patients with mild to moderate asthma: appraisal of a phase iii, four-way crossover design. Thorax 2016. [DOI: 10.1136/thoraxjnl-2016-209333.277] [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: 11/04/2022]
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Bainbridge ML, Saldinger LK, Barlow JW, Alvez JP, Roman J, Kraft J. 1609 Rumen bacterial communities continue to shift five weeks after switching diets from conserved forage to pasture. J Anim Sci 2016. [DOI: 10.2527/jam2016-1609] [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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Bainbridge ML, Egolf E, Barlow JW, Alvez JP, Roman J, Kraft J. 1322 Milk bioactive fatty acids decrease in cows grazing pearl millet versus a cool-season pasture. J Anim Sci 2016. [DOI: 10.2527/jam2016-1322] [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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Bainbridge ML, Saldinger LK, Barlow JW, Alvez JP, Roman J, Kraft J. 1640 Rumen protozoal communities are dynamic after a dietary switch from conserved forage to pasture. J Anim Sci 2016. [DOI: 10.2527/jam2016-1640] [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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Chalmeta I, Ivorra J, Marcos B, Diaz C, Beltran E, Negueroles R, Valero J, Feced C, Ortiz F, Gonazlez L, Martinez I, Labrador E, Arevalo K, Grau E, Alcañiz C, Fragio J, Roman J. FRI0490 Infertility and Pregnancy in Rheumatic Diseases: The Utility of A Multidisciplinary Protocol for The Management of These Patients. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.6064] [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: 11/04/2022]
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Kirsten AM, Richeldi L, Roman J, Le Maulf F, Hallmann C, Stowasser S, Lasky JA. Pooled analysis of mortality data from the TOMORROW and INPULSIS™ trials of nintedanib in idiopathic pulmonary fibrosis (IPF). Pneumologie 2015. [DOI: 10.1055/s-0035-1544831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Le Fur E, Wentz T, El Kabbaj O, Roman J, Visvikis D, Pradier O. Évaluation du repositionnement en radiothérapie par caméra temps de vol. Cancer Radiother 2013. [DOI: 10.1016/j.canrad.2013.07.106] [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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Roman J, Breier AR, Steppe M. Stability Indicating LC Method to Determination of Sodium Montelukast in Pharmaceutical Dosage Form and its Photodegradation Kinetics. J Chromatogr Sci 2011; 49:540-6. [DOI: 10.1093/chrsci/49.7.540] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Abstract
Lung carcinoma is the leading cause of carcinoma death in the world. Despite recent advances in understanding the molecular biology of lung cancer and the introduction of new therapeutic agents for its treatment, its dismal 5-year survival rate has not changed substantially. Clinical approaches have not significantly improved the survival of patients with advanced lung cancer. However, recent discoveries about the molecular mechanisms responsible for lung cancer initiation and proliferation have unveiled new targets for therapy. One of the hallmark features of cancer cells is their ability to evade programmed cell death or apoptosis. Alterations in pro- and anti-apoptotic pathways are common in cancer cells and defects in regulation of apoptosis have been implicated in both lung tumorigenesis and drug resistance. Thus, targeting apoptosis through the direct or indirect manipulation of the pro-apoptotic machinery offers a novel strategy for treatment. This mini review summaries the molecular events that contribute to drug-induced apoptosis and how lung tumors evade apoptotic death followed by an analysis of the implications for treatment.
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Affiliation(s)
- S W Han
- Division of Pulmonary, Critical Care and Sleep Disorders Medicine, Louisville School of Medicine, Louisville, KY 40202, USA.
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Roman J, Jobim C, Resende F, Siqueira G, Faria M, Rivas R. Composição física da carcaça e características da carne de bovinos de corte terminados em confinamento com diferentes dietas. ARQ BRAS MED VET ZOO 2010. [DOI: 10.1590/s0102-09352010000600020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Avaliou-se o efeito de diferentes dietas sobre as características da carcaça e da carne de bovinos de corte em confinamento: dieta composta por silagem de milho e formulação fixa durante o período de confinamento (SMF); dieta composta por silagem de milho e formulação variável durante o período de confinamento (SMV); dieta composta por silagem de cana-de-açúcar e formulação fixa (SCF); dieta composta por silagem de cana-de-açúcar e formulação variável (SCV); SCV na metade inicial do confinamento e SMV no período final (SCV/SMV). O delineamento experimental foi inteiramente ao acaso, com cinco tratamentos e três repetições. Houve maior deposição de gordura renal-pélvica-inguinal (P=0,03), de gordura subcutânea (P=0,06) e de gordura na carcaça (P=0,06) nas dietas com silagem de milho (6,7kg; 6,2mm e 34,6%) em relação àquelas com silagem de cana-de-açúcar (5,3kg; 4,8mm e 31,7%). Houve maior (P=0,05) rendimento de contrafilé e de miolo de alcatra nas dietas com silagem de milho (10% e 6,9%) em relação às com silagem de cana-de-açúcar (9% e 6,6%). Não houve efeito das dietas sobre rendimento de cortes primários (P>0,1), perdas por cocção (P>0,3) e força de cisalhamento (P>0,1). O ajuste da formulação da dieta e a troca de silagem não influenciaram as características de carcaça e da carne. A utilização de silagem de cana-de-açúcar permitiu carcaças com acabamento satisfatório
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Affiliation(s)
- J Roman
- Universidade Estadual de Maringá
| | | | - F.D Resende
- Agência Paulista de Tecnologia dos Agronegócios
| | | | - M.H Faria
- Agência Paulista de Tecnologia dos Agronegócios
| | - R Rivas
- Fundação Educacional de Barretos
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Blakeslee AMH, McKenzie CH, Darling JA, Byers JE, Pringle JM, Roman J. A hitchhiker’s guide to the Maritimes: anthropogenic transport facilitates long-distance dispersal of an invasive marine crab to Newfoundland. DIVERS DISTRIB 2010. [DOI: 10.1111/j.1472-4642.2010.00703.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Roman J, Malesuik MD, Jablonski A, Steppe M. Stability indicating method for sodium montelukast in pharmaceutical preparations by micellar electrokinetic capillary chromatography. Pharmazie 2010; 65:645-649. [PMID: 21038840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A simple, reliable micellar electrokinetic chromatography method (MEKC) for the determination of sodium montelukast in coated tablets was developed and validated. Successful results were obtained with 10 mmol L(-1) borate buffer and 30 mmol L-(1) sodium dodecyl sulfate at pH 9.4, injection time of 5.0 s, an applied voltage of 25 kV and a column temperature of 25 degrees C. The detector response for sodium montelukast was linear over the concentration range from 20 to 100 microg mL(-1) (r = 0.9995). The intra and inter-day precision showed suitable results (RSD < 1.46%). The analytical method accuracy was 99.67% (RSD = 1.11%). The limits of detection and quantitation were 0.75 and 2.00 microg mL(-1) respectively. The method demonstrated robustness and showed to be viable for the sodium montelukast determination in pharmaceutical dosage form.
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Affiliation(s)
- J Roman
- Pharmaceutical Sciences Department, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
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Olivares M, Martin M, Roman J, Moreno A. 87 Biopsychosocial assessment in breast oncology surgical pathology. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70118-x] [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] Open
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Nishihori T, Perkins J, Pidala J, Roman J, Kim J, Fernandez H, Anasetti C, Kharfan-Dabaja M. Allogeneic Hematopoietic Stem Cell Transplantation In Myelofibrosis: Single Center Experience. Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Furetta C, Roman J, Rivera T, Azorín J, Azorín CG, Vega-Carrillo HR. Modeling the thermoluminescent response of CaSO4:Dy by the MCNPX method. Appl Radiat Isot 2010; 68:967-9. [PMID: 20079655 DOI: 10.1016/j.apradiso.2009.12.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
This work describes an algorithm for absorbed dose evaluation in the region of X-ray diagnostic energy based on the response of CaSO(4):Dy thermoluminescence powder detectors. The absorbed dose was calculated using Monte Carlo simulation code (MCSC) and then compared to the experimental TLD results for X-rays effective energies (60)Co gamma radiation. In order to study the photon interaction in the matter, a cylindrical model of 1 cm(3) was used. The gamma radiation source was placed at 100 cm to the object; the source is considered as an isotropic source of (60)Co. The energy deposited into the cylindrical model was determined by the Monte Carlo N-particle (MCNPX) method. Measurements of the TL phosphors were obtained by irradiating the powder by gamma radiation. TL glow curve of CaSO(4):Dy after gamma irradiated at a 1 Gy of absorbed dose was then obtained.
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Affiliation(s)
- C Furetta
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Legaria-IPN, México DF, México
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Echelle AA, Hackler JC, Lack JB, Ballard SR, Roman J, Fox SF, Leslie DM, Van Den Bussche RA. Conservation genetics of the alligator snapping turtle: cytonuclear evidence of range-wide bottleneck effects and unusually pronounced geographic structure. CONSERV GENET 2009. [DOI: 10.1007/s10592-009-9966-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [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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Trivedi AN, Roman J. A case report of a laparoscopically treated cornual pregnancy as a result of spontaneous conception after prior salpingectomy for tubal pregnancy. J OBSTET GYNAECOL 2009; 18:602-3. [PMID: 15512197 DOI: 10.1080/01443619866534] [Citation(s) in RCA: 2] [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: 10/16/2022]
Affiliation(s)
- A N Trivedi
- Department of Obstetrics and Gynaecology, Waikato Hospital, Hamilton, New Zealand
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Giménez-Arnau A, Toll A, Gallardo F, Roman J, Pujol-Vallverdú RM. FS04.7
Atypic T-cell infiltrate by isothiazolinone. Question to discuss. Contact Dermatitis 2008. [DOI: 10.1111/j.0105-1873.2004.0309ap.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Moreno A, Roman J, Oviedo M, Ortega A, Furió V, Merchán M, Cepeda T, Martin M, Vidart J. 265 POSTER Locally advanced breast cancer: role of positron emission tomography and sentinel node biopsy following complete response after induction chemotherapy. Eur J Surg Oncol 2006. [DOI: 10.1016/s0748-7983(06)70700-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Ramirez AM, Shen Z, Ritzenthaler JD, Roman J. Myofibroblast transdifferentiation in obliterative bronchiolitis: tgf-beta signaling through smad3-dependent and -independent pathways. Am J Transplant 2006; 6:2080-8. [PMID: 16796722 DOI: 10.1111/j.1600-6143.2006.01430.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [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: 01/25/2023]
Abstract
We have shown that Smad3, an intracellular signal transducer for transforming growth factor-beta1 (TGF-beta1), is required to elicit the full histological manifestations of obliterative airway disease in a tracheal transplant model. This suggests that chronic allograft rejection results in TGF-beta1-induced Smad3 activation that leads to airway obliteration through fibroproliferation and increased matrix deposition. In other systems, these latter events are causally related to the transdifferentiation of fibroblasts into myofibroblasts, but their role in obliterative bronchiolitis (OB) after lung transplantation is unknown. We confirmed the presence of myofibroblasts inside affected airways associated with experimental OB using immunohistochemistry. Studying airway fibroblasts in vitro, we observed increased myofibroblast transdifferentiation in response to TGF-beta1, evidenced by increased alpha-smooth muscle actin mRNA and protein expression. In Smad3-null fibroblasts, TGF-beta1 induction of myofibroblast transdifferentiation was greatly diminished but not abolished, suggesting the presence of Smad3-independent pathways. Further studies revealed that small molecule inhibitors of p38 (SB203580) and MEK/ERK (U1026) further reduced the remaining effect of TGF-beta1 in Smad3-deficient fibroblasts. Together, these studies suggest that in chronic allograft rejection, TGF-beta1 stimulates myofibroblast transdifferentiation through Smad3-dependent and -independent signals, contributing to the excessive matrix deposition that characterizes obliterative bronchiolitis.
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Affiliation(s)
- A M Ramirez
- Andrew J. McKelvey Lung Transplantation Center, Emory University School of Medicine, Atlanta, Georgia, USA.
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Han SW, Roman J. Fibronectin induces cell proliferation and inhibits apoptosis in human bronchial epithelial cells: pro-oncogenic effects mediated by PI3-kinase and NF-κB. Oncogene 2006; 25:4341-9. [PMID: 16518410 DOI: 10.1038/sj.onc.1209460] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.8] [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: 01/05/2023]
Abstract
The extracellular matrix glycoprotein, fibronectin, influences a variety of cellular functions including adhesion, migration, survival, differentiation, and growth. Fibronectin has also been shown to increase the migration and proliferation of human lung carcinoma cells. However, the role of fibronectin in controlling lung airway epithelial cell phenotype remains unknown. Here, we demonstrate that fibronectin stimulates the proliferation of human bronchial epithelial cells (BEAS-2B and 16-HBE). Of note, fibronectin induced the mRNA and protein expression of c-Myc and cyclin D1, while it decreased the expressions of cyclin-dependent kinase inhibitor p21 (WAF-1/CIP1/MDA-6) (p21) and the tumor suppressor gene phosphatase and tensin homolog deleted on chromosome ten (PTEN). Fibronectin also stimulated the phosphorylation of the phosphatidylinositol 3 kinase (PI3-K) downstream signal Akt. The inhibitor of PI3-K, Wortmannin, and anti-alpha5beta1 integrin antibodies abrogated the effect of fibronectin on c-Myc, cyclin D1, p21, and PTEN expression. The stimulatory effect of fibronectin was mediated by nuclear factor kappaB (NF-kappaB) since fibronectin induced the expression of the p65 component of NF-kappaB and enhanced NF-kappaB DNA binding. Furthermore, we found that p65 small interfering RNA inhibited the effect of fibronectin on c-Myc, cyclin D1, p21, PTEN expression, and on fibronectin-induced cell proliferation. Finally, we found that fibronectin inhibits apoptosis by reducing DNA fragmentation and inhibiting the activities of caspases 3/7. Taken together, our findings demonstrate that fibronectin stimulates human bronchial epithelial cell growth and inhibits apoptosis through activation of NF-kappaB, which, in turn, increases the expression of c-Myc and cyclin D1 and decreases p21 and PTEN via alpha5beta1 integrin-dependent signals that include PI3-K/Akt. Therefore, alternations in the extracellular matrix composition of the lung, with increased fibronectin, might promote epithelial cell growth and thereby contribute to oncogenesis in certain settings.
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Affiliation(s)
- S W Han
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA.
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Mora AL, Torres-González E, Xu J, Ritzenthaler J, Roman J, Rojas M, Brigham KL, Stecenko A. 302 CIDOFOVIR THERAPY REDUCES GAMMAHERPESVIRUS (MHV68)-INDUCED PULMONARY FIBROSIS IN INTERFERON-GAMMA RECEPTOR-DEFICIENT MICE. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0008.301] [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: 11/18/2022]
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Ramadan B, Ritzenthaler JD, Rivera H, Roser-Page S, Jones D, Roman J. 303 OXIDATION OF THE THIOL DISULFIDE CYSTEINE/CYSTINE REDOX COUPLE STIMULATES LUNG FIBROBLAST PROLIFERATION AND MATRIX EXPRESSION THROUGH REDOX SIGNALING. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0008.302] [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: 11/18/2022]
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Gaffar M, Ritzenthaler J, Rivera H, Roser-Page S, Hart CM, Roman J. 228 NICOTINE PROMOTES MATRIX EXPRESSION IN ENDOTHELIAL CELLS THROUGH a7 NICOTINIC ACETYLCHOLINE RECEPTOR-MEDIATED SIGNALS. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0008.227] [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: 11/18/2022]
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Fernainy K, Joshi PC, Mitchell PO, Roman J, Guidot DM. 225 GRANULOCYTE-MACROPHAGE COLONY-STIMULATING FACTOR RECEPTORS ARE EXPRESSED IN RAT LUNG EPITHELIUM AND ARE DECREASED BY CHRONIC ETHANOL INGESTION. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0008.224] [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: 11/18/2022]
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Ramirez A, Rivera H, Ritzenthaler J, Roser S, Roman J. Modulation of myofibroblast differentiation by Peroxisome Proliferator-Activated Receptor-γ (PPARγ): A role for Transforming Growth Factor-β (TGFβ) signaling. J Heart Lung Transplant 2005. [DOI: 10.1016/j.healun.2004.12.008] [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: 10/25/2022] Open
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Tomic R, Rivera H, Ritzenthaler J, Roman J. 233 TISSUE REMODELING AND CORTICOSTEROIDS: FLUTICASONE PROPRIONATE INHIBITS NICOTINE-INDUCED FIBRONECTIN EXPRESSION IN FIBROBLASTS. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-786] [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: 11/03/2022]
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Tomic R, Rivera H, Ritzenthaler J, Roman J. 157 TISSUE REMODELING AND CORTICOSTEROIDS: FLUTICASONE PROPRIONATE INHIBITS NICOTINE-INDUCED FIBRONECTIN EXPRESSION IN FIBROBLASTS. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-710] [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: 11/04/2022]
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Tomic R, Rivera H, Ritzenthaler J, Roman J. TISSUE REMODELING AND CORTICOSTEROIDS: FLUTICASONE PROPRIONATE INHIBITS NICOTINE-INDUCED FIBRONECTIN EXPRESSION IN FIBROBLASTS. J Investig Med 2004. [DOI: 10.1097/00042871-200401001-00710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Perez RL, Perez TL, Roman J. 235 INCREASED AIRFLOW LIMITATION AND BRONCHOALVEOLAR LAVAGE NEUTROPHILS AND EOSINOPHILS DEFINE CHRONIC PULMONARY SARCOIDOSIS. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-788] [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: 11/04/2022]
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Santin AD, Bellone S, Parrish RS, Coke C, Dunn D, Roman J, Theus JW, Cannon MJ, Parham GP, Pecorelli S. Influence of allogeneic blood transfusion on clinical outcome during radiotherapy for cancer of the uterine cervix. Gynecol Obstet Invest 2003; 56:28-34. [PMID: 12867765 DOI: 10.1159/000072328] [Citation(s) in RCA: 26] [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: 07/22/2002] [Accepted: 05/26/2003] [Indexed: 11/19/2022]
Abstract
Anemia has long been reported to adversely affect the efficacy of radiation treatment in cervical cancer. On the basis of these findings, many radiation oncologists routinely use blood transfusions with the intent to maintain hemoglobin above specified levels during radiation therapy. However, allogeneic blood transfusions have been previously linked with biological and clinical phenomena correlated with immune suppression. In this study we have analyzed the effects of blood transfusion on the outcome of 130 patients with stage-IIB and -III cervical carcinomas treated with external radiation and intracavitary brachytherapy with or without concomitant platinum administration at the University of Arkansas for Medical Sciences between 1990 and 1999. With the exception of hemoglobin and hematocrit levels at the onset of treatment between the transfused and untransfused groups (p < 0.001), the distribution of age, histology, total radiation dose and duration of treatment were not significantly different between the 2 groups of stage-IIB and -III patients. Among the 45 stage-IIB patients who received blood during radiation treatment, there were 31 deaths (68.8%), compared with 14 (31.8%) among the 44 patients who did not receive blood (p > 0.05). Among the 30 stage-III patients who received blood during radiation treatment, there were 27 deaths (90%), compared with 6 (54%) among the 11 patients who did not receive blood (p > 0.11). In multivariate analysis of survival, there was a significant difference due to transfusion with a risk ratio (RR) of 2.6 (95% CI 1.6, 4.2; p < 0.001) after adjusting for no chemotherapy (RR = 2.2, 95% CI 1.4, 3.5; p < 0.001), considering all patients collectively, stage-IIB patients only (RR = 1.9, 95% CI 1.1, 3.3; p < 0.01), and stage-III patients only (RR = 3.2, 95% CI 1.2, 8.7; p < 0.02). These results suggest that routine blood transfusion of anemic cervical cancer patients does not improve outcome and may represent an independent variable predictive of diminished survival during primary radiation treatment for cervical cancer. Prospective randomized studies are strongly warranted to confirm this hypothesis.
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Affiliation(s)
- A D Santin
- Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, University of Arkansas for Medical Sciences, 4301 West Markham, Little Rock, AR 72205-7199, USA
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Rojas R, Roman J, Herrera C, Alvarez MA, Ramirez R, Torres A. BALB/C mice injected with LSTRA leukemic cell line are cured by in vivo treatment with IL-2 + GM-CSF. Leuk Res 2003; 27:351-7. [PMID: 12531227 DOI: 10.1016/s0145-2126(02)00180-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We studied the effects of the in vivo administration of interleukin-2 (IL-2) (at low doses) + GM-CSF in BALB/C mice injected intraperitoneally with LSTRA murine leukemic cell line in order to test the possible role of this immunotherapeutic approach in the eradication of leukemia. Mice were injected intraperitoneally on day -1 with different concentrations of LSTRA cells. On day 0, mice received a lethal dose of TBI of 700 cGy from a Cs(137) source, followed by a single high dose of recombinant human-granulocyte-colony stimulating factor (rh-G-CSF) (1 microg/g) intraperitoneally 2h after TBI. This procedure rescued 80% of mice but only mice injected with the lower concentration of LSTRA cells (10(3)) could be cured. The lethal dose (LD 100/60) of LSTRA in normal mice was 10(4). The subcutaneous administration of rh-IL-2 (4.000 IU/mouse per day, from day +1 to +28) + rm-GM-CSF (1 microg/kg per day) from day +7 to +28 cured mice injected with 10(4) LSTRA cells and 40% of mice injected with 10(5) cells. Mice injected with 10(6) cells died from leukemia. We observed an increase in LAK activity on days +21 and +28 without an increase in NK activity. We show that BALB/C mice injected with LSTRA cell line can be cured by in vivo activation with IL-2 + GM-CSF depending on the cell dose injected. The curability of leukemia was confirmed at the molecular level with a PCR method.
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Affiliation(s)
- R Rojas
- Department of Hematology, Reina Sofi;a University Hospital, Avda Menéndez Pidal s/n, 14004 Córdoba, Spain.
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Kulkosky J, Culnan DM, Roman J, Dornadula G, Schnell M, Boyd MR, Pomerantz RJ. Prostratin: activation of latent HIV-1 expression suggests a potential inductive adjuvant therapy for HAART. Blood 2001; 98:3006-15. [PMID: 11698284 DOI: 10.1182/blood.v98.10.3006] [Citation(s) in RCA: 262] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Prostratin is a unique phorbol ester that stimulates protein kinase C activity but is nontumor promoting. Remarkably, prostratin is also able to inhibit de novo human immunodeficiency virus type 1 (HIV-1) infection yet up-regulate viral expression from latent proviruses. Prostratin's lack of tumor promotion, coupled with its ability to block viral spread yet induce latent proviral expression, prompted studies to determine whether this compound could serve as an inductive adjuvant therapy for patients treated with highly active antiretroviral therapy (HAART). The current experiments indicate that prostratin is a potent mitogen for mononuclear phagocytes possessing many of the activities of phorbol myristate acetate (PMA) with notable functional differences. Prostratin, like PMA, accelerates differentiation of the myeloid cell-lines, HL-60 and THP-1, as well as mononuclear phagocytes from bone marrow and peripheral blood. Enzyme-linked immunosorbent assay and gene array analyses indicate significant changes in the expression of proteins and messenger RNA after treatment of cells with prostratin, consistent with phagocyte activation and differentiation. Prostratin blocks HIV-1 infection relating to down-regulation of CD4 receptor expression. The array analysis indicates a similar down-regulation of the HIV-1 coreceptors, CXCR4 and CCR5, and this may also reduce viral infectivity of treated host cells. Finally, prostratin is capable of up-regulating HIV-1 expression from CD8+ T lymphocyte-depleted peripheral blood mononuclear cells of patients undergoing HAART. This novel observation suggests the agent may be an excellent candidate to augment HAART by inducing expression of latent HIV-1 with the ultimate goal of eliminating persistent viral reservoirs in certain individuals infected with HIV-1.
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MESH Headings
- Antiretroviral Therapy, Highly Active
- CD4 Antigens/biosynthesis
- CD4 Antigens/genetics
- Cell Differentiation/drug effects
- Cells, Cultured/cytology
- Cells, Cultured/drug effects
- Dose-Response Relationship, Drug
- Drug Synergism
- Enzyme Activation/drug effects
- Gene Expression Profiling
- Gene Expression Regulation/drug effects
- HIV Infections/blood
- HIV Infections/drug therapy
- HIV Infections/virology
- HIV-1/drug effects
- HIV-1/physiology
- HL-60 Cells/cytology
- HL-60 Cells/drug effects
- Humans
- Leukemia, Monocytic, Acute/pathology
- Lymphocyte Activation
- Monocytes/cytology
- Monocytes/drug effects
- Myeloid Cells/cytology
- Myeloid Cells/drug effects
- Oligonucleotide Array Sequence Analysis
- Phorbol Esters/pharmacology
- Protein Kinase C/metabolism
- Proviruses/physiology
- RNA, Messenger/biosynthesis
- Receptors, CCR5/biosynthesis
- Receptors, CCR5/genetics
- Receptors, CXCR4/biosynthesis
- Receptors, CXCR4/genetics
- Tetradecanoylphorbol Acetate/pharmacology
- Tumor Cells, Cultured/cytology
- Tumor Cells, Cultured/drug effects
- Viral Load
- Virus Activation/drug effects
- Virus Latency
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Affiliation(s)
- J Kulkosky
- Dorrance H. Hamilton Laboratories, Center for Human Virology, Division of Infectious Diseases, Department of Medicine, Jefferson Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA.
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47
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Harnpicharnchai P, Jakovljevic J, Horsey E, Miles T, Roman J, Rout M, Meagher D, Imai B, Guo Y, Brame CJ, Shabanowitz J, Hunt DF, Woolford JL. Composition and functional characterization of yeast 66S ribosome assembly intermediates. Mol Cell 2001; 8:505-15. [PMID: 11583614 DOI: 10.1016/s1097-2765(01)00344-6] [Citation(s) in RCA: 262] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The pathway and complete collection of factors that orchestrate ribosome assembly are not clear. To address these problems, we affinity purified yeast preribosomal particles containing the nucleolar protein Nop7p and developed means to separate their components. Nop7p is associated primarily with 66S preribosomes containing either 27SB or 25.5S plus 7S pre-rRNAs. Copurifying proteins identified by mass spectrometry include ribosomal proteins, nonribosomal proteins previously implicated in 60S ribosome biogenesis, and proteins not known to be involved in ribosome production. Analysis of strains mutant for eight of these proteins not previously implicated in ribosome biogenesis showed that they do participate in this pathway. These results demonstrate that proteomic approaches in concert with genetic tools provide powerful means to purify and characterize ribosome assembly intermediates.
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Affiliation(s)
- P Harnpicharnchai
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, USA
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48
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Roman J, Jimenez A, Barrios M, Castillejo JA, Maldonado J, Torres A. E1A3 as a unique, naturally occurring BCR-ABL transcript in an indolent case of chronic myeloid leukaemia. Br J Haematol 2001; 114:635-7. [PMID: 11552990 DOI: 10.1046/j.1365-2141.2001.02971.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [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]
Abstract
A woman with Ph-positive chronic myeloid leukaemia (CML) with an atypical e1a3 BCR-ABL hybrid gene is described. To our knowledge, this is the first report of this transcript type as a unique naturally occurring BCR-ABL fusion in a CML patient. This case was characterized by a low leucocyte count and a very indolent course without treatment. Because the deletion of ABL exon 2 sequences results in deletion of an essential part of the ABL SH3 domain, our case suggests that this ABL SH3 domain is not absolutely necessary for efficient induction of a myeloproliferative disease in the context of BCR-ABL/p190.
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Affiliation(s)
- J Roman
- Haematology Department, Reina Sofia Hospital, Cordoba, Spain.
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49
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Santin AD, Bellone S, Ravaggi A, Roman J, Smith CV, Pecorelli S, Cannon MJ, Parham GP. Increased levels of interleukin-10 and transforming growth factor-beta in the plasma and ascitic fluid of patients with advanced ovarian cancer. BJOG 2001; 108:804-8. [PMID: 11510703 DOI: 10.1111/j.1471-0528.2001.00206.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To assess expression of the immunosuppressive cytokines IL-10 and TGF-beta in the ascitic fluid and plasma of advanced ovarian cancer patients. DESIGN A prospective study. SETTING The Department of Obstetrics and Gynaecology at the University of Arkansas for Medical Sciences. POPULATION Twenty-eight women diagnosed with advanced ovarian cancer and ten normal female controls. METHODS Plasma and ascitic samples were collected at the time of surgery and analysed for the presence of IL-10 and TGF-beta using a sensitive enzyme-linked immunosorbent assay. RESULTS Elevated levels of IL-10 were detected in the plasma [mean (SD) = 12 (5) pg/mL; range 8 to 23 pg/mL] and in the peritoneal fluid [mean (SD) = 165 (137) pg/mL; range 50 to 556 pg/mL] of ovarian cancer patients, while no detectable IL-10 was found in any of the normal control plasma samples tested. Similarly, plasma levels of TGF-beta in ovarian cancer patients were significantly higher [mean (SD) = 1,506 (246) pg/mL; range 1,020 to 2,070 pg/mL] compared with controls [mean (SD) = 937 (187) pg/mL; range 770 to 1,140 pg/mL](P < 0.001). Surprisingly, however, although elevated TGF-beta levels were also detected in the peritoneal fluid of all ovarian cancer patients [mean (SD) = 407 (158) pg/mL; range 140 to 770 pg/mL], these levels were significantly lower than those seen in matched plasma samples (P < 0.001). CONCLUSIONS Local and systemic secretion of immunosuppressive cytokines may play an important role in the impaired anti-tumour immune function commonly observed in advanced ovarian cancer. However, the observation that plasma levels of TGF-beta are significantly higher than those detected in the ascitic fluid raises the possibility that cells other than tumour cells are responsible for TGF-beta release in the bloodstream of these patients.
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Affiliation(s)
- A D Santin
- Department of Obstetrics and Gynaecology, University of Arkansas, Little Rock, USA
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50
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Roman J, Salinas AJ, Vallet-Regi M, Oliveira JM, Correia RN, Fernandes MH. Role of acid attack in the in vitro bioactivity of a glass-ceramic of the 3CaO.P2O5-CaO.SiO2-CaO.MgO.2SiO2 system. Biomaterials 2001; 22:2013-9. [PMID: 11426879 DOI: 10.1016/s0142-9612(00)00387-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/30/2022]
Abstract
A non-bioactive glass-ceramic (GC13) that contains hydroxyapatite (Ca5(PO4)3OH), diopside (CaMg(SiO3)2) and althausite (Mg2 PO4OH) as crystalline phases has been obtained by thermal treatment of a parent bioactive glass (G13) of nominal composition (wt%) 40.0 CaO-34.5 SiO2-16.5 P2O5-8.5 MgO-0.5CaF2. To induce bioactivity, GC13 was chemically treated with 1 M HCl for different periods of time. After chemical etching the in vitro studies showed formation of an apatite-like surface layer. In this article the influence of etching time both on the surface composition of the glass-ceramic and on the growth rate of the apatite layer is studied. It is concluded that the presence of hydroxyapatite in the glass-ceramic, associated to microstructural fluctuations, can favour apatite deposition in vitro.
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Affiliation(s)
- J Roman
- Department of Quimica Inorganica y Bioinorganica, Facultad de Farmacia, Universidad Complutense de Madrid, Spain
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