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Bonnet S, Benavides M, Le Moigne FAC, Camps M, Torremocha A, Grosso O, Dimier C, Spungin D, Berman-Frank I, Garczarek L, Cornejo-Castillo FM. Diazotrophs are overlooked contributors to carbon and nitrogen export to the deep ocean. ISME J 2023; 17:47-58. [PMID: 36163270 PMCID: PMC9750961 DOI: 10.1038/s41396-022-01319-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/25/2022] [Accepted: 09/06/2022] [Indexed: 11/09/2022]
Abstract
Diazotrophs are widespread microorganisms that alleviate nitrogen limitation in 60% of our oceans, thereby regulating marine productivity. Yet, the group-specific contribution of diazotrophs to organic matter export has not been quantified, which so far has impeded an accurate assessment of their impact on the biological carbon pump. Here, we examine the fate of five groups of globally-distributed diazotrophs by using an original combination of mesopelagic particle sampling devices across the subtropical South Pacific Ocean. We demonstrate that cyanobacterial and non-cyanobacterial diazotrophs are exported down to 1000 m depth. Surprisingly, group-specific export turnover rates point to a more efficient export of small unicellular cyanobacterial diazotrophs (UCYN) relative to the larger and filamentous Trichodesmium. Phycoerythrin-containing UCYN-B and UCYN-C-like cells were recurrently found embedded in large (>50 µm) organic aggregates or organized into clusters of tens to hundreds of cells linked by an extracellular matrix, presumably facilitating their export. Beyond the South Pacific, our data are supported by analysis of the Tara Oceans metagenomes collected in other ocean basins, extending the scope of our results globally. We show that, when diazotrophs are found in the euphotic zone, they are also systematically present in mesopelagic waters, suggesting their transport to the deep ocean. We thus conclude that diazotrophs are a significant part of the carbon sequestered in the deep ocean and, therefore, they need to be accounted in regional and global estimates of export.
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Affiliation(s)
- Sophie Bonnet
- Aix Marseille University, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France.
| | - Mar Benavides
- Aix Marseille University, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France ,grid.5399.60000 0001 2176 4817Turing Center for Living Systems, Aix-Marseille University, 13009 Marseille, France
| | - Frédéric A. C. Le Moigne
- Aix Marseille University, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France ,grid.463763.30000 0004 0638 0577LEMAR, Laboratoire des sciences de l’environnement marin, UMR6539, CNRS, UBO, IFREMER, IRD, 29280 Plouzané, Technopôle Brest-Iroise France
| | - Mercedes Camps
- Aix Marseille University, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Antoine Torremocha
- Aix Marseille University, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Olivier Grosso
- Aix Marseille University, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Céline Dimier
- grid.499565.20000 0004 0366 8890Laboratoire d’Océanographie de Villefranche (LOV), Sorbonne Université, CNRS, 06230 Villefranche sur mer, France
| | - Dina Spungin
- grid.18098.380000 0004 1937 0562University of Haifa, The Leon H. Charney School of Marine Sciences, Haifa, 3498838 Israel
| | - Ilana Berman-Frank
- grid.18098.380000 0004 1937 0562University of Haifa, The Leon H. Charney School of Marine Sciences, Haifa, 3498838 Israel
| | - Laurence Garczarek
- grid.464101.60000 0001 2203 0006Sorbonne Université, CNRS, UMR 7144 Adaptation and Diversity in the Marine Environment (AD2M), Station Biologique de Roscoff (SBR), Roscoff, France
| | - Francisco M. Cornejo-Castillo
- grid.464101.60000 0001 2203 0006Sorbonne Université, CNRS, UMR 7144 Adaptation and Diversity in the Marine Environment (AD2M), Station Biologique de Roscoff (SBR), Roscoff, France ,grid.418218.60000 0004 1793 765XInstitut de Ciènces del Mar (ICM-CSIC), E08003 Barcelona, Spain
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2
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Benavides M, Bonnet S, Le Moigne FAC, Armin G, Inomura K, Hallstrøm S, Riemann L, Berman-Frank I, Poletti E, Garel M, Grosso O, Leblanc K, Guigue C, Tedetti M, Dupouy C. Sinking Trichodesmium fixes nitrogen in the dark ocean. ISME J 2022; 16:2398-2405. [PMID: 35835942 PMCID: PMC9478103 DOI: 10.1038/s41396-022-01289-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/29/2022] [Accepted: 07/05/2022] [Indexed: 01/04/2023]
Abstract
The photosynthetic cyanobacterium Trichodesmium is widely distributed in the surface low latitude ocean where it contributes significantly to N2 fixation and primary productivity. Previous studies found nifH genes and intact Trichodesmium colonies in the sunlight-deprived meso- and bathypelagic layers of the ocean (200-4000 m depth). Yet, the ability of Trichodesmium to fix N2 in the dark ocean has not been explored. We performed 15N2 incubations in sediment traps at 170, 270 and 1000 m at two locations in the South Pacific. Sinking Trichodesmium colonies fixed N2 at similar rates than previously observed in the surface ocean (36-214 fmol N cell-1 d-1). This activity accounted for 40 ± 28% of the bulk N2 fixation rates measured in the traps, indicating that other diazotrophs were also active in the mesopelagic zone. Accordingly, cDNA nifH amplicon sequencing revealed that while Trichodesmium accounted for most of the expressed nifH genes in the traps, other diazotrophs such as Chlorobium and Deltaproteobacteria were also active. Laboratory experiments simulating mesopelagic conditions confirmed that increasing hydrostatic pressure and decreasing temperature reduced but did not completely inhibit N2 fixation in Trichodesmium. Finally, using a cell metabolism model we predict that Trichodesmium uses photosynthesis-derived stored carbon to sustain N2 fixation while sinking into the mesopelagic. We conclude that sinking Trichodesmium provides ammonium, dissolved organic matter and biomass to mesopelagic prokaryotes.
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Affiliation(s)
- Mar Benavides
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France.
- Turing Center for Living Systems, Aix-Marseille University, 13009, Marseille, France.
| | - Sophie Bonnet
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Frédéric A C Le Moigne
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
- LEMAR, Laboratoire des Sciences de l'Environnement Marin, UMR6539, CNRS, UBO, IFREMER, IRD, 29280, Plouzané, Technopôle Brest-Iroise, France
| | - Gabrielle Armin
- Graduate School of Oceanography, University of Rhode Island, South Kingstown, RI, USA
| | - Keisuke Inomura
- Graduate School of Oceanography, University of Rhode Island, South Kingstown, RI, USA
| | - Søren Hallstrøm
- Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark
| | - Lasse Riemann
- Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark
| | - Ilana Berman-Frank
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Mt, Carmel, Haifa, Israel
| | - Emilie Poletti
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Marc Garel
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Olivier Grosso
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Karine Leblanc
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Catherine Guigue
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Marc Tedetti
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Cécile Dupouy
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
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3
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Ortiz G, Bastidas A, Garay-Fernández M, Lara A, Benavides M, Rocha E, Buitrago A, Díaz G, Ordóñez J, Reyes LF. Correlation and validity of imputed PaO2/FiO2 and SpO2/FiO2 in patients with invasive mechanical ventilation at 2600m above sea level. Med Intensiva 2022; 46:501-507. [PMID: 36057441 DOI: 10.1016/j.medine.2021.05.010] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 05/04/2021] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To establish the correlation and validity between PaO2/FiO2 obtained on arterial gases versus noninvasive methods (linear, nonlinear, logarithmic imputation of PaO2/FiO2 and SpO2/FiO2) in patients under mechanical ventilation living at high altitude. DESIGN Ambispective descriptive multicenter cohort study. SETTING Two intensive care units (ICU) from Colombia at 2600m a.s.l. PATIENTS OR PARTICIPANTS Consecutive critically ill patients older than 18 years with at least 24h of mechanical ventilation were included from June 2016 to June 2019. INTERVENTIONS None. VARIABLES Variables analyzed were demographic, physiological messures, laboratory findings, oxygenation index and clinical condition. Nonlinear, linear and logarithmic imputation formulas were used to calculate PaO2 from SpO2, and at the same time the SpO2/FiO2 by severe hypoxemia diagnosis. The intraclass correlation coefficient, area under the ROC curve, sensitivity, specificity, positive predictive value, negative predictive value, positive and negative likelihood ratio were calculated. RESULTS The correlation between PaO2/FiO2 obtained from arterial gases, PaO2/FiO2 derived from one of the proposed methods (linear, non-linear, and logarithmic formula), and SpO2/FiO2 measured by the intraclass correlation coefficient was high (greater than 0.77, p<0.001). The different imputation methods and SpO2/FiO2 have a similar diagnostic performance in patients with severe hypoxemia (PaO2/FiO2 <150). PaO2/FiO2 linear imputation AUC ROC 0,84 (IC 0.81-0.87, p<0.001), PaO2/FiO2 logarithmic imputation AUC ROC 0.84 (IC 0.80-0.87, p<0.001), PaO2/FiO2 non-linear imputation AUC ROC 0.82 (IC 0.79-0.85, p<0.001), SpO2/FiO2 oximetry AUC ROC 0.84 (IC 0.81-0.87, p<0.001). CONCLUSIONS At high altitude, the SaO2/FiO2 ratio and the imputed PaO2/FiO2 ratio have similar diagnostic performance in patients with severe hypoxemia ventilated by various pathological conditions.
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Affiliation(s)
- G Ortiz
- Pulmonary Medicine, Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - A Bastidas
- School of Medicine, Universidad de la Sabana, Clínica Universidad de La Sabana, Chía, Colombia.
| | - M Garay-Fernández
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - A Lara
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - M Benavides
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - E Rocha
- Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - A Buitrago
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - G Díaz
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - J Ordóñez
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - L F Reyes
- School of Medicine, Universidad de la Sabana, Clínica Universidad de La Sabana, Chía, Colombia
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Benavides M, Alcaide-Garcia J, Torres E, Gil-Calle S, Sevilla I, Wolman R, Durán G, Álvarez M, Reyna-Fortes C, Ales I, Pereda T, Robles M, Kushnir M, Odegaard J, Faull I, Alba E. Clinical utility of comprehensive circulating tumor DNA genotyping compared with standard of care tissue testing in patients with newly diagnosed metastatic colorectal cancer. ESMO Open 2022; 7:100481. [PMID: 35525184 PMCID: PMC9271474 DOI: 10.1016/j.esmoop.2022.100481] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Comprehensive biomarker testing is essential in selecting optimal treatment for patients with metastatic colorectal cancer (mCRC); however, incomplete genotyping is widespread, with most patients not receiving testing for all guideline-recommended biomarkers, in part due to reliance on burdensome sequential tissue-based single-biomarker tests with long waiting times or availability of only archival tissue samples. We aimed to demonstrate that liquid biopsy, associated with rapid turnaround time (TAT) and lower patient burden, effectively identifies guideline-recommended biomarkers in mCRC relative to standard of care (SOC) tissue testing. PATIENTS AND METHODS Prospectively enrolled patients with previously untreated mCRC undergoing physician discretion SOC tissue genotyping submitted pretreatment blood samples for comprehensive circulating tumor DNA (ctDNA) analysis with Guardant360 and targeted RAS and BRAF analysis with OncoBEAM. RESULTS Among 155 patients, physician discretion SOC tissue genotyping identified a guideline-recommended biomarker in 82 patients, versus 88 identified with comprehensive ctDNA (52.9% versus 56.8%, noninferiority demonstrated down to α = 0.005) and 69 identified with targeted PCR ctDNA analysis (52.9% versus 44.5%, noninferiority rejected at α = 0.05). Utilizing ctDNA in addition to tissue increased patient identification for a guideline-recommended biomarker by 19.5% by rescuing those without tissue results either due to tissue insufficiency, test failure, or false negatives. ctDNA median TAT was significantly faster than tissue testing when the complete process from sample acquisition to results was considered (median 10 versus 27 days, P < 0.0001), resulting in accelerated biomarker discovery, with 52.0% biomarker-positive patients identified by ctDNA versus 10.2% by SOC tissue 10 days after sample collection (P < 0.0001). CONCLUSIONS Comprehensive ctDNA genotyping accurately identifies guideline-recommended biomarkers in patients with mCRC at a rate at least as high as SOC tissue genotyping, in a much shorter time. Based on these findings, the addition of ctDNA genotyping to clinical practice has significant potential to improve the care of patients with mCRC.
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Affiliation(s)
- M Benavides
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, Málaga, Spain
| | - J Alcaide-Garcia
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, Málaga, Spain; Medical Oncology Department, Hospital Costa del Sol, IBIMA, Málaga, Spain.
| | - E Torres
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, Málaga, Spain
| | - S Gil-Calle
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, Málaga, Spain
| | - I Sevilla
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, Málaga, Spain
| | - R Wolman
- Medical Oncology Service, Hospital Xanit, Málaga, Spain
| | - G Durán
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, Málaga, Spain; Medical Oncology Department, Hospital Universitario San Cecilio, Granada, Spain
| | - M Álvarez
- Cancer Molecular Biology Laboratory (CIMES), University of Málaga, Málaga, Spain
| | - C Reyna-Fortes
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, Málaga, Spain
| | - I Ales
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, Málaga, Spain
| | - T Pereda
- Pathology Department, Hospital Costa del Sol, IBIMA, Marbella, Spain
| | - M Robles
- Medical Oncology Department, Hospital Costa del Sol, Marbella, Spain
| | | | | | - I Faull
- Guardant Health Inc, Redwood, USA
| | - E Alba
- Medical Oncology Intercenter Unit, Hospital Universitario Regional y Virgen de la Victoria, IBIMA, CIBERONC, Málaga, Spain
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Riemann L, Rahav E, Passow U, Grossart HP, de Beer D, Klawonn I, Eichner M, Benavides M, Bar-Zeev E. Planktonic Aggregates as Hotspots for Heterotrophic Diazotrophy: The Plot Thickens. Front Microbiol 2022; 13:875050. [PMID: 35464923 PMCID: PMC9019601 DOI: 10.3389/fmicb.2022.875050] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 03/11/2022] [Indexed: 11/26/2022] Open
Abstract
Biological dinitrogen (N2) fixation is performed solely by specialized bacteria and archaea termed diazotrophs, introducing new reactive nitrogen into aquatic environments. Conventionally, phototrophic cyanobacteria are considered the major diazotrophs in aquatic environments. However, accumulating evidence indicates that diverse non-cyanobacterial diazotrophs (NCDs) inhabit a wide range of aquatic ecosystems, including temperate and polar latitudes, coastal environments and the deep ocean. NCDs are thus suspected to impact global nitrogen cycling decisively, yet their ecological and quantitative importance remain unknown. Here we review recent molecular and biogeochemical evidence demonstrating that pelagic NCDs inhabit and thrive especially on aggregates in diverse aquatic ecosystems. Aggregates are characterized by reduced-oxygen microzones, high C:N ratio (above Redfield) and high availability of labile carbon as compared to the ambient water. We argue that planktonic aggregates are important loci for energetically-expensive N2 fixation by NCDs and propose a conceptual framework for aggregate-associated N2 fixation. Future studies on aggregate-associated diazotrophy, using novel methodological approaches, are encouraged to address the ecological relevance of NCDs for nitrogen cycling in aquatic environments.
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Affiliation(s)
- Lasse Riemann
- Marine Biology Section, University of Copenhagen, Helsingør, Denmark
| | - Eyal Rahav
- Israel Oceanographic and Limnological Research, Haifa, Israel
| | - Uta Passow
- Ocean Science Centre, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Hans-Peter Grossart
- Institute for Biochemistry and Biology, Potsdam University, Potsdam, Germany.,Department of Plankton and Microbial Ecology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany
| | - Dirk de Beer
- Max Planck Institute for Marine Microbiology, Bremen, Germany
| | - Isabell Klawonn
- Department of Biological Oceanography, Leibniz Institute for Baltic Sea Research, Rostock, Germany
| | - Meri Eichner
- Institute of Microbiology CAS, Centre ALGATECH, Třeboň, Czechia
| | - Mar Benavides
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France.,Turing Center for Living Systems, Aix-Marseille University, Marseille, France
| | - Edo Bar-Zeev
- The Jacob Blaustein Institutes for Desert Research, Zuckerberg Institute for Water Research (ZIWR), Ben-Gurion University of the Negev, Be'er Sheva, Israel
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Benavides M, Caffin M, Duhamel S, Foster RA, Grosso O, Guieu C, Van Wambeke F, Bonnet S. Anomalously high abundance of Crocosphaera in the South Pacific Gyre. FEMS Microbiol Lett 2022; 369:6565802. [PMID: 35396843 DOI: 10.1093/femsle/fnac039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/22/2022] [Accepted: 04/06/2022] [Indexed: 11/12/2022] Open
Abstract
The unicellular diazotrophic cyanobacterium Crocosphaera contributes significantly to fixed nitrogen inputs in the oligotrophic ocean. In the western tropical South Pacific Ocean (WTSP), these diazotrophs abound thanks to the phosphorus-rich waters provided by the South Equatorial Current, and iron provided aeolian and subsurface volcanic activity. East of the WTSP, the South Pacific Gyre (SPG) harbors the most oligotrophic and transparent waters of the world's oceans, where only heterotrophic diazotrophs have been reported before. Here in the SPG we detected unexpected accumulation of Crocosphaera at 50 m with peak abundances of 5.26×105nifH gene copies L-1. The abundance of Crocosphaera at 50 m was in the same order of magnitude as those detected westwards in the WTSP and represented 100% of volumetric N2 fixation rates. This accumulation at 50 m was likely due to a deeper penetration of UV light in the clear waters of the SPG being detrimental for Crocosphaera growth and N2 fixation activity. Nutrient and trace metal addition experiments did not induce any significant changes in N2 fixation or Crocosphaera abundance, indicating that this population was not limited by the resources tested and could develop in high numbers despite the oligotrophic conditions. Our findings indicate that the distribution of Crocosphaera can extend into subtropical gyres and further understanding of their controlling factors is needed.
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Affiliation(s)
- Mar Benavides
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Mathieu Caffin
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Solange Duhamel
- Lamont Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
| | - Rachel Ann Foster
- Stockholm University, Department of Ecology, Environment and Plant Sciences, Stockholm, Sweden
| | - Olivier Grosso
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Cécile Guieu
- Sorbonne Universités, UPMC Univ Paris 06, INSU-CNRS, Laboratoire d'Océanographie de Villefranche, 181 Chemin du Lazaret, 06230 Villefranche-sur-mer, France.,Center for Prototype Climate Modeling, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - France Van Wambeke
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Sophie Bonnet
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
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7
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Meunier V, Bonnet S, Camps M, Benavides M, Dubosc J, Rodolfo-Metalpa R, Houlbrèque F. Ingestion of Diazotrophs Makes Corals More Resistant to Heat Stress. Biomolecules 2022; 12:biom12040537. [PMID: 35454126 PMCID: PMC9027526 DOI: 10.3390/biom12040537] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 03/08/2022] [Accepted: 03/13/2022] [Indexed: 01/27/2023] Open
Abstract
Over the past decade, coral bleaching events have continued to recur and intensify. During bleaching, corals expel millions of their symbionts, depriving the host from its main food source. One mechanism used by corals to resist bleaching consists in exploiting food sources other than autotrophy. Among the food sources available in the reefs, dinitrogen (N2)-fixing prokaryotes or planktonic diazotrophs (hereafter called ‘PD’) have the particularity to reduce atmospheric dinitrogen (N2) and release part of this nitrogen (diazotroph-derived nitrogen or DDN) in bioavailable form. Here, we submitted coral colonies of Stylophora pistillata, fed or not with planktonic diazotrophs, to a temperature stress of up to 31 ± 0.5 °C and measured their physiological responses (photosynthetic efficiency, symbiont density, and growth rates). Heat-unfed colonies died 8 days after the heat stress while heat-PD-fed corals remained alive after 10 days of heat stress. The supply of PD allowed corals to maintain minimal chlorophyll concentration and symbiont density, sustaining photosynthetic efficiency and stimulating coral growth of up to 48% compared to unfed ones. By providing an alternative source of bioavailable nitrogen and carbon, this specific planktonic diazotroph feeding may have a profound potential for coral bleaching recovery.
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Affiliation(s)
- Valentine Meunier
- ENTROPIE UMR 9220 (CNRS, IRD, UR, UNC, IFREMER) Institut de Recherche pour le Développement, Nouméa 98848, New Caledonia; (R.R.-M.); (F.H.)
- Correspondence:
| | - Sophie Bonnet
- Aix-Marseille University, CNRS, IRD, MIO UM 110, 13288 Marseille, France; (S.B.); (M.C.); (M.B.)
| | - Mercedes Camps
- Aix-Marseille University, CNRS, IRD, MIO UM 110, 13288 Marseille, France; (S.B.); (M.C.); (M.B.)
| | - Mar Benavides
- Aix-Marseille University, CNRS, IRD, MIO UM 110, 13288 Marseille, France; (S.B.); (M.C.); (M.B.)
| | - Jeff Dubosc
- Laboratory of Marine Biology and Ecology, Aquarium des Lagons, Noumea 98807, New Caledonia;
| | - Riccardo Rodolfo-Metalpa
- ENTROPIE UMR 9220 (CNRS, IRD, UR, UNC, IFREMER) Institut de Recherche pour le Développement, Nouméa 98848, New Caledonia; (R.R.-M.); (F.H.)
| | - Fanny Houlbrèque
- ENTROPIE UMR 9220 (CNRS, IRD, UR, UNC, IFREMER) Institut de Recherche pour le Développement, Nouméa 98848, New Caledonia; (R.R.-M.); (F.H.)
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8
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Benavides M, Gómez-España A, García-Alfonso P, García C, Vieitez J, Massuti Sureda B, Rivera F, Safont Aguilera M, Abad Esteve A, Granja Ortega M, Valladares-Ayerbes M, Carrato Mena A, González-Flores E, Robles L, Salud Salvia A, Alonso V, Montagut Viladot C, Asensio-Martinez E, Díaz-Rubio E, Aranda Aguilar E. 418P Upfront primary tumour resection (UPTR) and survival in synchronous metastatic colorectal cancer according to primary tumour location and RAS status: Pooled analysis of the Spanish Cooperative Group for the Treatment of Digestive Tumours (TTD). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.939] [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] Open
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Benavides M, Alcaide-Garcia J, Torres E, Gil S, Durán G, Reyna C, Wolman R, Alvarez M, Kushnir M, Faull I, Muñoz M, Alba E. 503P Mutational landscape in synchronous unresectable metastatic colorectal cancer (mCRC) according to upfront primary tumour resection (UPTR). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1022] [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] Open
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10
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Ortiz G, Bastidas A, Garay-Fernández M, Lara A, Benavides M, Rocha E, Buitrago A, Díaz G, Ordóñez J, Reyes LF. Correlation and validity of imputed PaO2/FiO2 and SpO2/FiO2 in patients with invasive mechanical ventilation at 2600m above sea level. Med Intensiva 2021; 46:S0210-5691(21)00100-5. [PMID: 34167826 DOI: 10.1016/j.medin.2021.05.001] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 04/09/2021] [Accepted: 05/04/2021] [Indexed: 01/15/2023]
Abstract
OBJECTIVE To establish the correlation and validity between PaO2/FiO2 obtained on arterial gases versus noninvasive methods (linear, nonlinear, logarithmic imputation of PaO2/FiO2 and SpO2/FiO2) in patients under mechanical ventilation living at high altitude. DESIGN Ambispective descriptive multicenter cohort study. SETTING Two intensive care units (ICU) from Colombia at 2600m a.s.l. PATIENTS OR PARTICIPANTS Consecutive critically ill patients older than 18 years with at least 24h of mechanical ventilation were included from June 2016 to June 2019. INTERVENTIONS None. VARIABLES Variables analyzed were demographic, physiological messures, laboratory findings, oxygenation index and clinical condition. Nonlinear, linear and logarithmic imputation formulas were used to calculate PaO2 from SpO2, and at the same time the SpO2/FiO2 by severe hypoxemia diagnosis. The intraclass correlation coefficient, area under the ROC curve, sensitivity, specificity, positive predictive value, negative predictive value, positive and negative likelihood ratio were calculated. RESULTS The correlation between PaO2/FiO2 obtained from arterial gases, PaO2/FiO2 derived from one of the proposed methods (linear, non-linear, and logarithmic formula), and SpO2/FiO2 measured by the intraclass correlation coefficient was high (greater than 0.77, p<0.001). The different imputation methods and SpO2/FiO2 have a similar diagnostic performance in patients with severe hypoxemia (PaO2/FiO2 <150). PaO2/FiO2 linear imputation AUC ROC 0,84 (IC 0.81-0.87, p<0.001), PaO2/FiO2 logarithmic imputation AUC ROC 0.84 (IC 0.80-0.87, p<0.001), PaO2/FiO2 non-linear imputation AUC ROC 0.82 (IC 0.79-0.85, p<0.001), SpO2/FiO2 oximetry AUC ROC 0.84 (IC 0.81-0.87, p<0.001). CONCLUSIONS At high altitude, the SaO2/FiO2 ratio and the imputed PaO2/FiO2 ratio have similar diagnostic performance in patients with severe hypoxemia ventilated by various pathological conditions.
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Affiliation(s)
- G Ortiz
- Pulmonary Medicine, Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - A Bastidas
- School of Medicine, Universidad de la Sabana, Clínica Universidad de La Sabana, Chía, Colombia.
| | - M Garay-Fernández
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - A Lara
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - M Benavides
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - E Rocha
- Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - A Buitrago
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - G Díaz
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - J Ordóñez
- Pulmonary Medicine Universidad El Bosque, Intensive Care Unit, Hospital Santa Clara Bogotá, Colombia
| | - L F Reyes
- School of Medicine, Universidad de la Sabana, Clínica Universidad de La Sabana, Chía, Colombia
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Luque R, Benavides M, del Barco S, Egaña L, García-Gómez J, Martínez-García M, Pérez-Segura P, Pineda E, Sepúlveda JM, Vieito M. SEOM clinical guideline for management of adult medulloblastoma (2020). Clin Transl Oncol 2021; 23:940-947. [PMID: 33792841 PMCID: PMC8057961 DOI: 10.1007/s12094-021-02581-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] [Accepted: 03/02/2021] [Indexed: 11/25/2022]
Abstract
Recent advances in molecular profiling, have reclassified medulloblastoma, an undifferentiated tumor of the posterior fossa, in at least four diseases, each one with differences in prognosis, epidemiology and sensibility to different treatments. The recommended management of a lesion with radiological characteristics suggestive of MB includes maximum safe resection followed by a post-surgical MR < 48 h, LCR cytology and MR of the neuroaxis. Prognostic factors, such as presence of a residual tumor volume > 1.5 cm2, presence of micro- or macroscopic dissemination, and age > 3 years as well as pathological (presence of anaplastic or large cell features) and molecular findings (group, 4, 3 or p53 SHH mutated subgroup) determine the risk of relapse and should guide adjuvant management. Although there is evidence that both high-risk patients and to a lesser degree, standard-risk patients benefit from adjuvant craneoespinal radiation followed by consolidation chemotherapy, tolerability is a concern in adult patients, leading invariably to dose reductions. Treatment after relapse is to be considered palliative and inclusion on clinical trials, focusing on the molecular alterations that define each subgroup, should be encouraged. Selected patients can benefit from surgical rescue or targeted radiation or high-dose chemotherapy followed by autologous self-transplant. Even in patients that are cured by chemorradiation presence of significant sequelae is common and patients must undergo lifelong follow-up.
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Affiliation(s)
- R. Luque
- Department of Medical Oncology, Hospital Universitario Virgen de Las Nieves, Granada, Spain
| | - M. Benavides
- Department of Medical Oncology, Hospital Regional Universitario Carlos Haya, Malaga, Spain
| | - S. del Barco
- Department of Medical Oncology, Hospital Universitari Dr. Josep Trueta. ICO Girona, Girona, Spain
| | - L. Egaña
- Department of Medical Oncology, Hospital Donostia-Donostia Ospitalea, San Sebastián, Spain
| | - J. García-Gómez
- Department of Medical Oncology, Complexo Hospitalario de Ourense (CHUO), Orense, Spain
| | - M. Martínez-García
- Department of Medical Oncology, Hospital del Mar - Parc de Salut Mar, Barcelona, Spain
| | - P. Pérez-Segura
- Department of Medical Oncology, Hospital Universitario Clínico San Carlos, Madrid, Spain
| | - E. Pineda
- Department of Medical Oncology, Hospital Clinic I Provincial de Barcelona, Barcelona, Spain
| | - J. M. Sepúlveda
- Department of Medical Oncology, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - M. Vieito
- Department of Medical Oncology, Hospital Universitario Vall D’Hebron, Barcelona, Spain
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12
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Benavides M, Conradt L, Bonnet S, Berman-Frank I, Barrillon S, Petrenko A, Doglioli A. Fine-scale sampling unveils diazotroph patchiness in the South Pacific Ocean. ISME Commun 2021; 1:3. [PMID: 37938230 PMCID: PMC9723698 DOI: 10.1038/s43705-021-00006-2] [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] [Received: 10/21/2020] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 06/01/2023]
Abstract
Diazotrophs are important contributors to nitrogen availability in the ocean. Oceanographic cruise data accumulated over the past three decades has revealed a heterogeneous distribution of diazotroph species at regional to global scales. However, dynamic fine-scale physical structures likely affect the distribution of diazotrophs at smaller spatiotemporal scales. The interaction between fine-scale ocean dynamics and diazotrophs remains poorly understood due to typically insufficient spatiotemporal sampling resolution and the lack of parallel detailed physical studies. Here we show the distribution of five groups of diazotrophs in the South Pacific at an unprecedented resolution of 7-16 km. We find a patchy distribution of diazotrophs, with each group being differentially affected by parameters describing fine-scale physical structures. The observed variability in species abundance and distribution would be masked by a coarser sampling resolution, highlighting the need to consider fine-scale physics to resolve the distribution of diazotrophs in the ocean.
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Affiliation(s)
- Mar Benavides
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France.
| | - Louis Conradt
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Sophie Bonnet
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Ilana Berman-Frank
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Mt. Carmel, Haifa, Israel
| | - Stéphanie Barrillon
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Anne Petrenko
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Andrea Doglioli
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
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13
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Benavides M, Duhamel S, Van Wambeke F, Shoemaker KM, Moisander PH, Salamon E, Riemann L, Bonnet S. Dissolved organic matter stimulates N2 fixation and nifH gene expression in Trichodesmium. FEMS Microbiol Lett 2021; 367:5743415. [PMID: 32083662 DOI: 10.1093/femsle/fnaa034] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 12/20/2019] [Accepted: 02/20/2020] [Indexed: 12/15/2022] Open
Abstract
Mixotrophy, the combination of heterotrophic and autotrophic nutrition modes, is emerging as the rule rather than the exception in marine photosynthetic plankton. Trichodesmium, a prominent diazotroph ubiquitous in the (sub)tropical oceans, is generally considered to obtain energy via autotrophy. While the ability of Trichodesmium to use dissolved organic phosphorus when deprived of inorganic phosphorus sources is well known, the extent to which this important cyanobacterium may benefit from other dissolved organic matter (DOM) resources is unknown. Here we provide evidence of carbon-, nitrogen- and phosphorus-rich DOM molecules enhancing N2 fixation rates and nifH gene expression in natural Trichodesmium colonies collected at two stations in the western tropical South Pacific. Sampling at a third station located in the oligotrophic South Pacific Gyre revealed no Trichodesmium but showed presence of UCYN-B, although no nifH expression was detected. Our results suggest that Trichodesmium behaves mixotrophically in response to certain environmental conditions, providing them with metabolic plasticity and adding up to the view that mixotrophy is widespread among marine microbes.
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Affiliation(s)
- Mar Benavides
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Solange Duhamel
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA
| | - France Van Wambeke
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Katyanne M Shoemaker
- Department of Biology, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02747, USA
| | - Pia H Moisander
- Department of Biology, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02747, USA
| | - Ellen Salamon
- Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
| | - Lasse Riemann
- Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
| | - Sophie Bonnet
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
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14
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Benavides M, Arístegui J. Untreated sewage outfalls do not promote Trichodesmium blooms in the coasts of the Canary Islands. Sci Rep 2020; 10:18386. [PMID: 33110228 PMCID: PMC7591472 DOI: 10.1038/s41598-020-75447-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 05/10/2020] [Accepted: 09/30/2020] [Indexed: 11/10/2022] Open
Abstract
During the summer of 2017, recurrent extensive blooms of the diazotrophic cyanobacterium Trichodesmium invaded the beaches and coastal waters of the Canary Islands, causing great social alarm. Some local media and public sectors ascribed, without any strong scientific evidence, the origin and reactivation of these blooms to untreated sewage outfalls distributed along the coasts. In order to test whether sewage outfalls could have any influence on the metabolic activity of Trichodesmium, we performed 13C and 15N2 uptake experiments with colonies experiencing three different bloom development stages, incubated both with clear seawater and sewage water from an outfall south of Gran Canaria island. Our results showed that sewage outfalls did not promote any increase in dinitrogen (N2) fixation in Trichodesmium, supporting the hypothesis that decaying blooms were generated offshore and transported shoreward by local currents and winds, accumulating mostly leeward of the islands. The combination of unusually warm seawater temperatures, enhanced and sustained stratification of the upper water column and recurrent dust deposition events would have favored the development of the Trichodesmium blooms, which lasted for at least four months.
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Affiliation(s)
- Mar Benavides
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Javier Arístegui
- Instituto de Oceanografía y Cambio Global, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain.
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15
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Baños I, Montero MF, Benavides M, Arístegui J. INT Toxicity over Natural Bacterial Assemblages from Surface Oligotrophic Waters: Implications for the Assessment of Respiratory Activity. Microb Ecol 2020; 80:237-242. [PMID: 31915852 DOI: 10.1007/s00248-019-01479-4] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 12/22/2019] [Indexed: 06/10/2023]
Abstract
Plankton community respiration (R) is a major component of the carbon flux in aquatic ecosystems. However, current methods to measure actual respiration from oxygen consumption at relevant spatial scales are not sensitive enough in oligotrophic environments where respiration rates are very low. To overcome this drawback, more sensitive indirect enzymatic approaches are commonly used as R proxies. The in vivo electron transport system (ETSvivo) assay, which measures the reduction of (2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl tetrazolium chloride salt, INT) to INT-formazan in the presence of natural substrate levels, was recently proposed as an indirect reliable estimation of R for natural plankton communities. However, under in vivo conditions, formazan salts could be toxic to the cells. Here, we test the toxicity of 0.2 mM of final INT concentration, widely used for ETSvivo assays, on natural bacterial assemblages collected in coastal and oceanic waters off Gran Canaria (Canary Islands, subtropical North Atlantic), in eight independent experiments. After 0.5 h of incubation, a significant but variable decline in cell viability (14-49%) was observed in all samples inoculated with INT. Moreover, INT also inhibited leucine uptake in less than 90 min of incubation. In the light of these results, we argue that enzymatic respiratory rates obtained with the ETSvivo method need to be interpreted with caution to derive R in oceanic regions where bacteria largely contribute to community respiration. Moreover, the variable toxicity on bacterial assemblages observed in our experiments questions the use of a single R/ETSvivo relationship as a universal proxy for regional studies.
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Affiliation(s)
- Isabel Baños
- Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - María F Montero
- Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - Mar Benavides
- Aix-Marseille Université, Université de Toulon, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 13288, Marseille, France
| | - Javier Arístegui
- Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain.
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16
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Meunier V, Bonnet S, Pernice M, Benavides M, Lorrain A, Grosso O, Lambert C, Houlbrèque F. Bleaching forces coral's heterotrophy on diazotrophs and Synechococcus. ISME J 2019; 13:2882-2886. [PMID: 31249389 PMCID: PMC6794269 DOI: 10.1038/s41396-019-0456-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 05/20/2019] [Accepted: 06/02/2019] [Indexed: 11/08/2022]
Abstract
Coral reefs are threatened by global warming, which disrupts the symbiosis between corals and their photosynthetic symbionts (Symbiodiniaceae), leading to mass coral bleaching. Planktonic diazotrophs or dinitrogen (N2)-fixing prokaryotes are abundant in coral lagoon waters and could be an alternative nutrient source for corals. Here we incubated untreated and bleached coral colonies of Stylophora pistillata with a 15N2-pre-labelled natural plankton assemblage containing diazotrophs. 15N2 assimilation rates in Symbiodiniaceae cells and tissues of bleached corals were 5- and 30-fold higher, respectively, than those measured in untreated corals, demonstrating that corals incorporate more nitrogen derived from planktonic diazotrophs under bleaching conditions. Bleached corals also preferentially fed on Synechococcus, nitrogen-rich picophytoplanktonic cells, instead of Prochlorococcus and picoeukaryotes, which have a lower cellular nitrogen content. By providing an alternative source of bioavailable nitrogen, both the incorporation of nitrogen derived from planktonic diazotrophs and the ingestion of Synechococcus may have profound consequences for coral bleaching recovery, especially for the many coral reef ecosystems characterized by high abundance and activity of planktonic diazotrophs.
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Affiliation(s)
- Valentine Meunier
- Laboratoire d'Excellence CORAIL, ENTROPIE (UMR9220), IRD, 98848, Nouméa cedex, New Caledonia.
| | - Sophie Bonnet
- Aix Marseille University, Université́ de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Mathieu Pernice
- Faculty of Science, Climate Change Cluster (C3), University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Mar Benavides
- Aix Marseille University, Université́ de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Anne Lorrain
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Olivier Grosso
- Aix Marseille University, Université́ de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | | | - Fanny Houlbrèque
- Laboratoire d'Excellence CORAIL, ENTROPIE (UMR9220), IRD, 98848, Nouméa cedex, New Caledonia
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17
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Benavides M, Chu Van T, Mari X. Amino acids promote black carbon aggregation and microbial colonization in coastal waters off Vietnam. Sci Total Environ 2019; 685:527-532. [PMID: 31176973 DOI: 10.1016/j.scitotenv.2019.05.141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/10/2019] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
The combustion of fossil fuels and biomass produces pyrogenic organic matter usually known as 'black carbon' (BC), which are transported across the atmosphere as particulate aerosol, eventually deposited on land and oceans. Soil studies have investigated the potential microbial colonization and remineralization of BC particles, but this process has been seldom studied in marine waters. BC provides a significant input of organic carbon to the oceans, yet its fate and role in biogeochemical cycling remains unknown. Here we explored the microbial colonization of BC particles in coastal seawater samples collected in Halong Bay (northern Vietnam). Using high-resolution mass spectrometry and microscopy methods, we observed an increasing colonization of BC particles by marine microbes in the presence of amino acids. Our results suggest that natural organic matter (NOM) present in seawater may promote the microbial colonization and eventual remineralization of BC particles. Future experiments should explore the potential microbial remineralization of BC particles to unveil the role of this massive source of carbon to marine ecosystems.
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Affiliation(s)
- Mar Benavides
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France.
| | - Thuoc Chu Van
- Institute of Marine Environment and Resources (IMER), Vietnam Academy of Science and Technology (VAST), 246 Da Nang Street, Haiphong, Viet Nam
| | - Xavier Mari
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France; Institute of Marine Environment and Resources (IMER), Vietnam Academy of Science and Technology (VAST), 246 Da Nang Street, Haiphong, Viet Nam; University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology (VAST), Hanoi, Viet Nam
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18
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Vaz Salgado MÁ, Rodríguez Sánchez Á, Fernandez Perez I, Quintanar T, Navarro Martin M, Vieito Villar M, Cano J, Gonzalez S, Ros S, Herrero Ibañez A, Ivars M, Lloret M, Alonso M, Moya I, Luque R, Benavides M, Gutiérrez Toribio M, García-Gómez J, Esteban Villarrubia J, Torres Jimenez J. Spanish survey of treatment recommendations for elderly patients with glioblastoma. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz243.021] [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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19
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Barrull JV, Casadevall D, Fernandez M, Castro-Henriques M, García-Alfonso P, Martin-Cullell B, Alonso-Orduna V, Alonso RMR, Benavides M, Vivas CS, Fernández EE, Garcia-Carbonero R, Ferreiro R, Manzano J, Losa F, Salazar R, Tabernero J, Aguilar EA, Bellosillo B, Viladot CM. Clinical relevance of circulating tumour (ct)DNA genotyping for first-line cetuximab-based treatment monitoring in metastatic colorectal cancer (mCRC): A prospective multicentric study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.102] [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: 11/12/2022] Open
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20
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Argiles G, Margalef NM, Valladares-Ayerbes M, de Prado JV, Grávalos C, Alfonso PG, Santos C, Tobeña M, Sastre J, Benavides M, Cano T, Loupakis F, Garrote MR, Rivera F, Goldberg R, Falcone A, Bennouna J, Ciardiello F, Tabernero J, Aranda E. Results of REARRANGE trial: A randomized phase 2 study comparing different dosing approaches for regorafenib (REG) during the first cycle of treatment in patients (pts) with metastatic colorectal cancer (mCRC). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz154.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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21
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Carrato A, Benavides M, Massutí B, Ferreiro-Monteagudo R, García Alfonso P, Falcó E, Reboredo M, Cano T, Gallego J, Viéitez JM, Layos L, Salud A, Polo E, Dotor E, Durán-Ogalla G, Rodriguez-Garrote M, Calvo A, Grande E, Aranda E. First-line single-agent regorafenib in frail patients with metastatic colorectal cancer: a pilot phase II study of the Spanish Cooperative Group for the Treatment of Digestive Tumours (TTD). BMC Cancer 2019; 19:533. [PMID: 31159765 PMCID: PMC6547483 DOI: 10.1186/s12885-019-5753-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 05/27/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Treatment of frail patients with advanced colorectal cancer (CRC) is controversial. This pilot phase II trial aimed to assess the efficacy and safety of regorafenib when administered in first-line to frail patients with advanced CRC. METHODS Frail patients without prior advanced colorectal cancer treatment were included in the study. Definition of frailty was defined per protocol based on dependency criteria, presence of chronic comorbid pathologies and/or geriatric features. MAIN OBJECTIVE to assess progression-free survival (PFS) rate at 6 months. Treatment consisted of 28-day cycles of orally administered regorafenib 160 mg/day (3 weeks followed by 1 week rest). RESULTS Forty-seven patients were included in the study. Median age was 81 years (range 63-89). Frailty criteria: dependency was observed in 26 patients (55%), comorbidities in 27 (57%) and geriatric features in 18 (38%). PFS rate at 6 months was 45% (95% confidence interval [CI] 30-60]. Median PFS was 5.6 months (95%CI 2.7-8.4). Median overall survival (OS) was 16 months (95%CI 7.8-24). Complete response, partial response and stable disease were observed in one, two and 21 patients respectively (objective response rate 6.4%; disease control rate 51%). Thirty-nine patients (83%) experienced grade 3-4 adverse events (AEs). The most common grade 3-4 AEs were hypertension (15 patients; 32%), asthenia (14; 30%), hypophosphatemia (6; 13%); diarrhea (4; 8%), hand-foot-skin reaction (4; 8%). There were two toxic deaths (4.2%) (grade 5 rectal bleeding and death not further specified). Dose reduction was required in 26 patients (55%) and dose-delays in 13 patients (28%). CONCLUSIONS The study did not meet the pre-specified boundary of 55% PFS rate at 6 months. Toxicity observed (83% patients experienced grade 3 and 4 AEs) preclude its current use in clinical practice on this setting. Disease control rate and overall survival results are interesting and might warrant further investigation to identify those who benefit from this approach. TRIAL REGISTRATION This trial was prospectively registered at EudraCT ( 2013-000236-94 ). Date of trial registration: April 9th, 2013.
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Affiliation(s)
- A. Carrato
- Medical Oncology Department, Hospital Universitario Ramón y Cajal, IRYCIS, CIBERONC, Alcala University, Ctra. De Colmenar Viejo, km 9,100, 28034 Madrid, Spain
| | - M. Benavides
- Hospital Regional Universitario Virgen de la Victoria, Málaga, Spain
| | - B. Massutí
- Hospital General Universitario de Alicante, Alicante, Spain
| | - R. Ferreiro-Monteagudo
- Medical Oncology Department, Hospital Universitario Ramón y Cajal, IRYCIS, CIBERONC, Alcala University, Ctra. De Colmenar Viejo, km 9,100, 28034 Madrid, Spain
| | | | - E. Falcó
- Hospital Son Llatzer, Mallorca, Spain
| | - M. Reboredo
- Complejo Hospitalario Universitario A Coruña, La Coruña, Spain
| | - T. Cano
- Hospital Universitario Reina Sofia, IMIBIC, University of Córdoba, CIBERONC, Instituto de Salud Carlos III, Córdoba, Spain
| | - J. Gallego
- Hospital General Universitario de Elche, Alicante, Spain
| | - J. M. Viéitez
- Hospital Universitario Central de Asturias, Oviedo, Spain
| | - L. Layos
- Hospital Germans Trias i Pujol, ICO, Badalona, Spain
| | - A. Salud
- Hospital de Lleida Arnau de Vilanova, Lérida, Spain
| | - E. Polo
- Hospital Miguel Servet, Zaragoza, Spain
| | - E. Dotor
- Corporació Sanitària Parc Taulí, Barcelona, Spain
| | - G. Durán-Ogalla
- Hospital Regional Universitario Virgen de la Victoria, Málaga, Spain
| | - M. Rodriguez-Garrote
- Medical Oncology Department, Hospital Universitario Ramón y Cajal, IRYCIS, CIBERONC, Alcala University, Ctra. De Colmenar Viejo, km 9,100, 28034 Madrid, Spain
| | - A. Calvo
- Hospital Gregorio Marañón, Madrid, Spain
| | - E. Grande
- Medical Oncology Department, Hospital Universitario Ramón y Cajal, IRYCIS, CIBERONC, Alcala University, Ctra. De Colmenar Viejo, km 9,100, 28034 Madrid, Spain
| | - E. Aranda
- Hospital Universitario Reina Sofia, IMIBIC, University of Córdoba, CIBERONC, Instituto de Salud Carlos III, Córdoba, Spain
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22
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Coutinho D, Vargas A, Feudjio C, Benavides M, Wouwer AV. A robust approach to the design of super-twisting observers – application to monitoring microalgae cultures in photo-bioreactors. Comput Chem Eng 2019. [DOI: 10.1016/j.compchemeng.2018.07.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Gómez-España MA, Gallego J, González-Flores E, Maurel J, Páez D, Sastre J, Aparicio J, Benavides M, Feliu J, Vera R. SEOM clinical guidelines for diagnosis and treatment of metastatic colorectal cancer (2018). Clin Transl Oncol 2018; 21:46-54. [PMID: 30565083 PMCID: PMC6339676 DOI: 10.1007/s12094-018-02002-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 11/28/2018] [Indexed: 12/22/2022]
Abstract
Colorectal cancer (CRC) is the second cause of cancer death in Spain, the objective of this guide published by the Spanish Society of Medical Oncology is to develop a consensus for the diagnosis and management of metastatic disease. The optimal treatment strategy for patients with metastatic CRC should be discussed in a multidisciplinary expert team to select the most appropriate treatment, and integrate systemic treatment and other options such as surgery and ablative techniques depending on the characteristics of the tumour, the patient and the location of the disease and metastases.
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Affiliation(s)
- M A Gómez-España
- Servicio de Oncología Médica, H. Universitario Reina Sofía, IMIBIC, CIBERONC, Av. Menéndez Pidal, s/n, 14004, Córdoba, Spain.
| | - J Gallego
- Servicio de Oncología Médica, Hospital General Universitario, Elche, Spain
| | - E González-Flores
- Servicio de Oncología Médica, H. U. Virgen de las Nieves, Granada, Spain
| | - J Maurel
- Servicio de Oncología Médica, Hospital Clinic, Barcelona, Spain
| | - D Páez
- Servicio de Oncología Médica, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - J Sastre
- Servicio de Oncología Médica, Hospital Clínico San Carlos, IdISSC, CIBERONC, Madrid, Spain
| | - J Aparicio
- Servicio de Oncología Médica, Hospital Universitari i Politècnic La Fe, Valencia, Spain
| | - M Benavides
- Servicio de Oncología Médica, H.U. Regional y Virgen de la Victoria, Málaga, Spain
| | - J Feliu
- Servicio de Oncología Médica, H. U. La Paz, UAM, CIBERONC, Madrid, Spain
| | - R Vera
- Servicio de Oncología Médica, Complejo Hospitalario de Navarra, IdiSNA, Pamplona, Spain
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24
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Vivancos A, Aranda Aguilar E, Benavides M, Elez Fernandez E, Toledano M, Alvarez M, Diaz Rubio E, Gómez-España A, Garcia-Barberan V, Chica-Parrao M. Evaluation of the sensitivity of RAS mutation detection of the Idylla platform in comparison to the OncoBEAM RAS CRC assay. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.096] [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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25
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Ceresoli G, Pless M, Benavides M, Vergote I. P2.06-05 TTFields Applied to the Torso and Upper Abdomen: Safety Meta-Analysis of 176 Patients from four Phase I-II Trials. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Aranda E, García-Alfonso P, Benavides M, Sánchez Ruiz A, Guillén-Ponce C, Safont M, Alcaide J, Gómez A, López R, Manzano J, Méndez Ureña M, Sastre J, Rivera F, Grávalos C, García T, Martín-Valadés J, Falcó E, Navalón M, González Flores E, Ma García Tapiador A, Ma López Muñoz A, Barrajón E, Reboredo M, García Teijido P, Viudez A, Cárdenas N, Díaz-Rubio E. First-line mFOLFOX plus cetuximab followed by mFOLFOX plus cetuximab or single-agent cetuximab as maintenance therapy in patients with metastatic colorectal cancer: Phase II randomised MACRO2 TTD study. Eur J Cancer 2018; 101:263-272. [DOI: 10.1016/j.ejca.2018.06.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 06/21/2018] [Accepted: 06/24/2018] [Indexed: 01/07/2023]
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27
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Balañá C, Alonso M, Hernandez-Lain A, Perez-Segura P, Pineda E, Ramos A, Sanchez AR, Teixidor P, Verger E, Benavides M. Correction to: SEOM clinical guidelines for anaplastic gliomas (2017). Clin Transl Oncol 2018; 20:937. [PMID: 29858734 DOI: 10.1007/s12094-018-1904-6] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The SEOM/GEINO clinical guidelines provide recommendations for radiological, and molecular diagnosis, treatment and follow-up of adult patients with anaplastic gliomas (AG). We followed the 2016 WHO classification which specifies the major diagnostic/prognostic and predictive value of IDH1/IDH2 missense mutations and 1p/19q codeletions in AG. The diagnosis of anaplastic oligoastrocytoma is discouraged. Surgery, radiotherapy and chemotherapy with PCV or TMZ are the first-line standard of care for AG with slight modifications according to molecular variables. A multidisciplinary team is highly recommended in the management of these tumors.
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Affiliation(s)
- C Balañá
- Institut Català Oncologia Badalona, Ct. Canyet, s/n, 08916, Barcelona, Spain.
| | - M Alonso
- Complejo Hospitalario Virgen del Rocío, Seville, Spain
| | | | - P Perez-Segura
- Hospital Universitario Clínico San Carlos, Madrid, Spain
| | - E Pineda
- Hospital Clínic i Provincial, Barcelona, Spain
| | - A Ramos
- Hospital 12 de Octubre, Madrid, Spain
| | - A R Sanchez
- Complejo Asistencial Universitario de León, León, Spain
| | - P Teixidor
- Hospital Universitari Germans Trias i Pujol Badalona, Barcelona, Spain
| | - E Verger
- Hospital Clínic i Provincial, Barcelona, Spain
| | - M Benavides
- Hospital Universitario Regional y Virgen de la Victoria, Málaga, Spain
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28
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Duhamel S, Van Wambeke F, Lefevre D, Benavides M, Bonnet S. Mixotrophic metabolism by natural communities of unicellular cyanobacteria in the western tropical South Pacific Ocean. Environ Microbiol 2018; 20:2743-2756. [PMID: 29573372 DOI: 10.1111/1462-2920.14111] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 03/12/2018] [Accepted: 03/17/2018] [Indexed: 12/31/2022]
Abstract
Cyanobacteria are major contributors to ocean biogeochemical cycling. However, mixotrophic metabolism and the relative importance of inorganic and organic carbon assimilation within the most abundant cyanobacteria are still poorly understood. We explore the ability of Prochlorococcus and Synechococcus to assimilate organic molecules with variable C:N:P composition and its modulation by light availability and photosynthetic impairment. We used a combination of radiolabelled molecules incubations with flow cytometry cell sorting to separate picoplankton groups from the western tropical South Pacific Ocean. Prochlorococcus and Synechococcus assimilated glucose, leucine and ATP at all stations, but cell-specific assimilation rates of N and P containing molecules were significantly higher than glucose. Incubations in the dark or with an inhibitor of photosystem II resulted in reduced assimilation rates. Light-enhanced cell-specific glucose uptake was generally higher for cyanobacteria (∼50%) than for the low nucleic acid fraction of bacterioplankton (LNA, ∼35%). Our results confirm previous findings, based mainly on cultures and genomic potentials, showing that Prochlorococcus and Synechococcus have a flexible mixotrophic metabolism, but demonstrate that natural populations remain primarily photoautotrophs. Our findings indicate that mixotrophy by marine cyanobacteria is more likely to be an adaptation to low inorganic nutrient availability rather than a facultative pathway for carbon acquisition.
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Affiliation(s)
- Solange Duhamel
- Lamont Doherty Earth Observatory, Division of Biology and Paleo Environment, PO Box 1000, 61 Route 9W, Palisades, NY 10964, USA
| | - France Van Wambeke
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Dominique Lefevre
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Mar Benavides
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France.,Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, 98848, Noumea, New Caledonia
| | - Sophie Bonnet
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France.,Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, 98848, Noumea, New Caledonia
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29
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Abad A, Martínez-Balibrea E, Viéitez J, Alonso-Orduña V, García Alfonso P, Manzano J, Massutí B, Benavides M, Carrato A, Zanui M, Gallego J, Grávalos C, Conde V, Provencio M, Valladares-Ayerbes M, Salazar R, Sastre J, Montagut C, Rivera F, Aranda E. Genotype-based selection of treatment of patients with advanced colorectal cancer (SETICC): a pharmacogenetic-based randomized phase II trial. Ann Oncol 2018; 29:439-444. [DOI: 10.1093/annonc/mdx737] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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30
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Balañá C, Alonso M, Hernandez-Lain A, Hernandez A, Perez-Segura P, Pineda E, Ramos A, Sanchez AR, Teixidor P, Verger E, Benavides M. SEOM clinical guidelines for anaplastic gliomas (2017). Clin Transl Oncol 2017; 20:16-21. [PMID: 29058264 PMCID: PMC5785606 DOI: 10.1007/s12094-017-1762-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 10/04/2017] [Indexed: 11/29/2022]
Abstract
The SEOM/GEINO clinical guidelines provide recommendations for radiological, and molecular diagnosis, treatment and follow-up of adult patients with anaplastic gliomas (AG). We followed the 2016 WHO classification which specifies the major diagnostic/prognostic and predictive value of IDH1/IDH2 missense mutations and 1p/19q codeletions in AG. The diagnosis of anaplastic oligoastrocytoma is discouraged. Surgery, radiotherapy and chemotherapy with PCV or TMZ are the first-line standard of care for AG with slight modifications according to molecular variables. A multidisciplinary team is highly recommended in the management of these tumors.
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Affiliation(s)
- C Balañá
- Institut Català Oncologia Badalona, Ct. Canyet, s/n, 08916, Barcelona, Spain.
| | - M Alonso
- Complejo Hospitalario Virgen del Rocío, Seville, Spain
| | | | | | - P Perez-Segura
- Hospital Universitario Clínico San Carlos, Madrid, Spain
| | - E Pineda
- Hospital Clínic i Provincial, Barcelona, Spain
| | - A Ramos
- Hospital 12 de Octubre, Madrid, Spain
| | - A R Sanchez
- Complejo Asistencial Universitario de León, León, Spain
| | - P Teixidor
- Hospital Universitari Germans Trias i Pujol Badalona, Barcelona, Spain
| | - E Verger
- Hospital Clínic i Provincial, Barcelona, Spain
| | - M Benavides
- Hospital Universitario Regional y Virgen de la Victoria, Málaga, Spain
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31
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Moisander PH, Benavides M, Bonnet S, Berman-Frank I, White AE, Riemann L. Chasing after Non-cyanobacterial Nitrogen Fixation in Marine Pelagic Environments. Front Microbiol 2017; 8:1736. [PMID: 28943875 PMCID: PMC5596534 DOI: 10.3389/fmicb.2017.01736] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Accepted: 08/25/2017] [Indexed: 11/22/2022] Open
Abstract
Traditionally, cyanobacterial activity in oceanic photic layers was considered responsible for the marine pelagic dinitrogen (N2) fixation. Other potentially N2-fixing bacteria and archaea have also been detected in the pelagic water column, however, the activity and importance of these non-cyanobacterial diazotrophs (NCDs) remain poorly constrained. In this perspective we summarize the N2 fixation rates from recently published studies on photic and aphotic layers that have been attributed to NCD activity via parallel molecular measurements, and discuss the status, challenges, and data gaps in estimating non-cyanobacterial N2 fixation NCNF in the ocean. Rates attributed to NCNF have generally been near the detection limit thus far (<1 nmol N L−1 d−1). Yet, if considering the large volume of the dark ocean, even low rates of NCNF could make a significant contribution to the new nitrogen input to the ocean. The synthesis here shows that nifH transcription data for NCDs have been reported in only a few studies where N2 fixation rates were detected in the absence of diazotrophic cyanobacteria. In addition, high apparent diversity and regional variability in the NCDs complicate investigations of these communities. Future studies should focus on further investigating impacts of environmental drivers including oxygen, dissolved organic matter, and dissolved inorganic nitrogen on NCNF. Describing the ecology of NCDs and accurately measuring NCNF rates, are critical for a future evaluation of the contribution of NCNF to the marine nitrogen budget.
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Affiliation(s)
- Pia H Moisander
- Department of Biology, University of Massachusetts DartmouthNorth Dartmouth, MA, United States
| | - Mar Benavides
- Marine Biology Section, Department of Biology, University of CopenhagenHelsingør, Denmark
| | - Sophie Bonnet
- Centre National de la Recherche Scientifique, IRD, Aix-Marseille Université, Université de ToulonMarseille, France
| | - Ilana Berman-Frank
- Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan UniversityRamat Gan, Israel
| | - Angelicque E White
- College of Earth, Ocean, and Atmospheric Sciences, Oregon State UniversityCorvallis, OR, United States
| | - Lasse Riemann
- Marine Biology Section, Department of Biology, University of CopenhagenHelsingør, Denmark
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32
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Caba O, Irigoyen A, Jimenez-Luna C, Benavides M, Ortuño F, Guillen-Ponce C, Rojas I, Aranda Aguilar E, Prados J. Integrative multi-platform meta-analysis of gene expression profiles in pancreatic ductal adenocarcinoma patients for identifying novel diagnostic biomarkers. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx378.008] [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: 11/12/2022] Open
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33
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Garcia Foncillas J, Tabernero J, Aranda Aguilar E, Benavides M, Camps C, López R, Montagut C, Anton Torres A, Lopez Vivanco G, Diaz Rubio E, Rojo F, Vivancos A. First prospective multicenter real-world RAS mutation comparison between OncoBEAM-based liquid biopsy and tissue analysis. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx363.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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34
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Benavides M, Abad A, Carrato A, Gravalos C, Fernández-Montes A, Falcó E, González-Flores E, Garcia Garcia T, Martin-Valades J, Gallego Plazas J, Valladares-Ayerbes M, García-Girón C, Dueñas R, García-Tapiador A, Pericay C, Losa F, Viudez A, García-Teijido P, Diaz Rubio E, Aranda Aguilar E. Benefits of upfront primary tumour resection (UPTR) according to sidedness in mCRC: Retrospective analyses of TTD MACRO-2 and PLANET randomised trials. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.019] [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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35
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Benavides M, Carrato A, Abad A, Guillen-Ponce C, Garcia-Alfonso P, Gil S, Cano Osuna M, Safont M, Gravalos C, Manzano-Mozo J, Sanchez A, Alcaide-Garcia J, López R, Massuti Sureda B, Sastre J, Martinez de Castro E, Escudero P, Méndez-Ureña M, Diaz Rubio E, Aranda Aguilar E. Impact of tumor location on the efficacy of first-line anti-EGFR monoclonal antibody plus chemotherapy in patients (pts) with metastatic colorectal cancer (mCRC): Retrospective analyses of the randomized MACRO-2 and PLANET trials from TTD Group. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Kueng M, Guillen-Ponce C, Rivera Herrero F, Gallego Plazas J, Lopez-Martin J, Benavides M. PANOVA: a phase II study of TTFields (150 kHz) with concomitant standard chemotherapy for front-line advanced pancreatic adenocarcinoma: Updated efficacy results. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx369.141] [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: 11/14/2022] Open
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37
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Vera L, Pérez-Beteta J, Molina D, Borrás JM, Benavides M, Barcia JA, Velásquez C, Albillo D, Lara P, Pérez-García VM. P09.62 Towards individualized survival prediction in glioblastoma patients using machine learning methods. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.317] [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: 11/12/2022] Open
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38
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Benavides M, Houlbrèque F, Camps M, Lorrain A, Grosso O, Bonnet S. Diazotrophs: a non-negligible source of nitrogen for the tropical coral Stylophora pistillata. ACTA ACUST UNITED AC 2016; 219:2608-12. [PMID: 27335448 DOI: 10.1242/jeb.139451] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [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: 02/22/2016] [Accepted: 06/14/2016] [Indexed: 12/20/2022]
Abstract
Corals are mixotrophs: they are able to fix inorganic carbon through the activity of their symbiotic dinoflagellates and to gain nitrogen from predation on plankton and uptake of dissolved organic and inorganic nutrients. They also live in close association with diverse diazotrophic communities, inhabiting their skeleton, tissue and mucus layer, which are able to fix dinitrogen (N2). The quantity of fixed N2 transferred to the corals and its distribution within coral compartments as well as the quantity of nitrogen assimilated through the ingestion of planktonic diazotrophs are still unknown. Here, we quantified nitrogen assimilation via (i) N2 fixation by symbiont diazotrophs, (ii) ingestion of cultured unicellular diazotrophs and (iii) ingestion of natural planktonic diazotrophs. We estimate that the ingestion of diazotrophs provides 0.76±0.15 µg N cm(-2) h(-1), suggesting that diazotrophs represent a non-negligible source of nitrogen for scleractinian corals.
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Affiliation(s)
- Mar Benavides
- Mediterranean Institute of Oceanography (MIO) - IRD/CNRS/Aix-Marseille University, Noumea 98848, New Caledonia
| | - Fanny Houlbrèque
- Laboratoire d'Excellence CORAIL, ENTROPIE (UMR9220), IRD, Noumea 98848, New Caledonia
| | - Mercedes Camps
- Mediterranean Institute of Oceanography (MIO) - IRD/CNRS/Aix-Marseille University, Noumea 98848, New Caledonia
| | - Anne Lorrain
- Laboratoire des Sciences de l'Environnement Marin, LEMAR (UMR 6539 UBO), CNRS, IRD, Ifremer, IRD Nouméa, Noumea 98848, New Caledonia
| | - Olivier Grosso
- Mediterranean Institute of Oceanography (MIO) - IRD/CNRS/Aix-Marseille University, 13288 Marseille, France
| | - Sophie Bonnet
- Mediterranean Institute of Oceanography (MIO) - IRD/CNRS/Aix-Marseille University, Noumea 98848, New Caledonia
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39
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Rivera F, Gallego J, Guillén-Ponce C, Benavides M, Lopez-Martin J, Kueng M. P-126 PANOVA: a pilot study of TTFields concomitant with gemcitabine for front-line therapy of advanced pancreatic adenocarcinoma. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw199.120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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40
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Pérez-Segura P, Manneh R, Ceballos I, García A, Benavides M, Fuster J, Vaz MA, Cano JM, Berros JP, Covela M, Moreno V, Quintanar T, García Bueno JM, Fernández I, Sepúlveda J. GEINOFOTE: efficacy and safety of fotemustine in patients with high-grade recurrent gliomas and poor performance status. Clin Transl Oncol 2015; 18:805-12. [DOI: 10.1007/s12094-015-1444-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 10/26/2015] [Indexed: 11/30/2022]
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41
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Barrios P, Losa F, Gonzalez-Moreno S, Rojo A, Gómez-Portilla A, Bretcha-Boix P, Ramos I, Torres-Melero J, Salazar R, Benavides M, Massuti T, Aranda E. Recommendations in the management of epithelial appendiceal neoplasms and peritoneal dissemination from mucinous tumours (pseudomyxoma peritonei). Clin Transl Oncol 2015; 18:437-48. [DOI: 10.1007/s12094-015-1413-9] [Citation(s) in RCA: 10] [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] [Received: 06/30/2015] [Accepted: 08/17/2015] [Indexed: 01/19/2023]
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42
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Aranda E, García-Alfonso P, Benavides M, Sanchez-Ruiz A, Guillen-Ponce C, Safont M, Alcaide J, Gomez A, Lopez R, Manzano J, Mendez-Urena M, Lopez C, García-Paredes B, Grávalos C, García-García T, Falco E, Martin-Valades J, Gonzalez-Flores E, Navalon M, Diaz-Rubio E. 2122 Treatment outcomes according to extended RAS mutation testing in a phase II study of first-line mFOLFOX plus cetuximab followed by cetuximab in monotherapy as maintenance therapy or mFOLFOX plus cetuximab in patients with metastatic colorectal cancer: The MACRO-2 trial. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31044-9] [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: 10/22/2022]
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43
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Shinozaki E, Laurent S, Gravalos C, Benavides M, Munoz FL, Mizuguchi H, Wahba M, Ychou M, Ciardiello F, Siena S, Yamaguchi K, Muro K, Denda T, Tsuji Y, Loehrer P, Lenz H, Tebbutt N, Mayer R, Van Cutsem E, Ohtsu A. 2151 Timing of adverse events (AEs) in the Phase 3 RECOURSE trial of TAS-102 versus placebo in patients (pts) with metastatic colorectal cancer (mCRC). Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31072-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Muriel Lopez C, Perez-Ruiz E, Gonzalez I, Ales I, Pascual J, Duran G, Rivas-Ruiz F, Benavides M, Marquez A, Pajares B, Plata Y, Diaz T, Zarcos I, Alcaide J, Gimenez F, Lopez P, Gil S, Muros B, Rueda A, Alba E. 2304 Polychemotherapy on patients with pancreatic carcinoma: Experience of four hospitals in Spain. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31220-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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García Alfonso P, Ortiz M, Durán G, Falcó E, Muñoz A, García-Paredes B, Salgado M, López-Ladrón A, Vieitez de Prado J, Valladares M, Salud A, Guillén-Ponce C, Lopez R, Robles L, Juárez A, Serrano S, Montagut C, Zanui M, Gil Raga M, La Casta A, Benavides M, Aranda E. P-272 Phase II study of Regorafenib as single agent for the treatment of patients with metastatic colorectal cancer with any RAS or BRAF mutation and previously treated with FOLFOXIRI plus bevacizumab. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.269] [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: 11/12/2022] Open
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Hochster H, Hager S, Pipas J, Tebbutt N, Laurent S, Gravalos C, Benavides M, Longo Munoz F, Portales F, Ciardiello F, Siena S, Yamaguchi K, Muro K, Denda T, Tsuji Y, Ohtsu A, Van Cutsem E, Mayer R. O-010 KRAS and BRAF gene subgroup analysis in the Phase 3 RECOURSE trial of TAS-102 versus placebo in patients with metastatic colorectal cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv235.09] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Falcone A, Laurent S, Grávalos C, Benavides M, Longo Muñoz F, Ychou M, Ciardiello F, Siena S, Yamaguchi K, Muro K, Denda T, Tsuji Y, Tebbutt N, Loehrer P, Lenz HJ, Mayer R, Ohtsu A, Van Cutsem E. P-284 Phase 3 RECOURSE trial of TAS-102 versus placebo with best supportive care in patients with metastatic colorectal cancer: European subgroup. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.281] [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] Open
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Sastre J, Argilés G, Benavides M, Feliú J, García-Alfonso P, García-Carbonero R, Grávalos C, Guillén-Ponce C, Martínez-Villacampa M, Pericay C. Clinical management of regorafenib in the treatment of patients with advanced colorectal cancer. Clin Transl Oncol 2014; 16:942-53. [PMID: 25223744 PMCID: PMC4194027 DOI: 10.1007/s12094-014-1212-8] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 08/01/2014] [Indexed: 12/19/2022]
Abstract
Colorectal cancer is one of the most common tumors worldwide and at least 50 % of patients with this disease develop metastases. In this setting, additional treatment options are needed for patients presenting disease progression after exhausting all standard therapies. Regorafenib is an orally administered multikinase inhibitor which has been shown to provide survival benefits to patients with metastatic colorectal cancer (mCRC). Although most adverse events (AEs) associated with regorafenib may resolve within the first 8 weeks of treatment, some of them may require dose reduction or treatment interruption. Overall, while remaining aware of the safety profile of regorafenib and how to manage the most common toxicities related to its use, this drug should be considered a new standard of care for patients with pretreated mCRC. This review addresses practical aspects of its use, such as dosing, patient monitoring, and management of the most common regorafenib-related AEs.
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Affiliation(s)
- J Sastre
- Medical Oncology Department, Clinic San Carlos University Hospital (Center Affiliated with the Red Tematica de Investigacion Cooperativa en Cancer, Instituto Carlos III, Spanish Ministry of Science and Innovation), Calle Profesor Martín Lagos, s/n, 28040, Madrid, Spain,
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Perez Segura P, Manneh R, Ceballos I, Garcia Castaño A, Benavides M, Fuster J, Cano J, Vaz M, Berros J, Covela M, Moreno V, Quintanar T, Garcia-Bueno J, Fernández Perez I, Gallego O, Ramirez Daffós P, Espinos Jimenez J, Gonzalez S, Del Barco S, Ros S. Geinofote: Safety and Activity Analysis of the Use of Fotemustine (Ft) in Different Schedules in Progressive Glioblastoma (Gb) in Spain. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu330.17] [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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50
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Feier FH, Miura IK, Fonseca EA, Porta G, Pugliese R, Porta A, Schwartz IVD, Margutti AVB, Camelo JS, Yamaguchi SN, Taveira AT, Candido H, Benavides M, Danesi V, Guimaraes T, Kondo M, Chapchap P, Neto JS. Successful domino liver transplantation in maple syrup urine disease using a related living donor. ACTA ACUST UNITED AC 2014; 47:522-6. [PMID: 24770567 PMCID: PMC4086180 DOI: 10.1590/1414-431x20143830] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 04/25/2014] [Indexed: 11/22/2022]
Abstract
Maple syrup urine disease (MSUD) is an autosomal recessive disease associated with
high levels of branched-chain amino acids. Children with MSUD can present severe
neurological damage, but liver transplantation (LT) allows the patient to resume a
normal diet and avoid further neurological damage. The use of living related donors
has been controversial because parents are obligatory heterozygotes. We report a case
of a 2-year-old child with MSUD who underwent a living donor LT. The donor was the
patient's mother, and his liver was then used as a domino graft. The postoperative
course was uneventful in all three subjects. DNA analysis performed after the
transplantation (sequencing of the coding regions of BCKDHA,
BCKDHB, and DBT genes) showed that the MSUD
patient was heterozygous for a pathogenic mutation in the BCKDHB
gene. This mutation was not found in his mother, who is an obligatory carrier for
MSUD according to the family history and, as expected, presented both normal clinical
phenotype and levels of branched-chain amino acids. In conclusion, our data suggest
that the use of a related donor in LT for MSUD was effective, and the liver of the
MSUD patient was successfully used in domino transplantation. Routine donor
genotyping may not be feasible, because the test is not widely available, and, most
importantly, the disease is associated with both the presence of allelic and locus
heterogeneity. Further studies with this population of patients are required to
expand the use of related donors in MSUD.
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Affiliation(s)
- F H Feier
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - I K Miura
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - E A Fonseca
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - G Porta
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - R Pugliese
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - A Porta
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - I V D Schwartz
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - A V B Margutti
- Departamento de Pediatria, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - J S Camelo
- Departamento de Pediatria, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - S N Yamaguchi
- Departamento de Nutrição, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - A T Taveira
- Departamento de Hepatologia, Universidade Estadual do Amazonas, Manaus, AM, Brasil
| | - H Candido
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - M Benavides
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - V Danesi
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - T Guimaraes
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - M Kondo
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - P Chapchap
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
| | - J Seda Neto
- Departamento de Hepatologia e Transplante Hepático, Hospital Sírio-Libanês, São Paulo, SP, Brasil
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