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Kanso A, Benizri E, Azoury S, Echevarria G, Sirguey C. Maximizing trace metal phytoextraction through planting methods: Role of rhizosphere fertility and microbial activities. Chemosphere 2023; 340:139833. [PMID: 37595688 DOI: 10.1016/j.chemosphere.2023.139833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 08/01/2023] [Accepted: 08/14/2023] [Indexed: 08/20/2023]
Abstract
Brownfields are a widespread problem in the world. The poor quality of these soils and the potential presence of contaminants can pose a significant threat to plant establishment and growth. However, it may be possible to improve their establishment with an appropriate agricultural practice. In this paper, the effects of two common planting strategies, seeding and transplanting, on the establishment and growth of the hyperaccumulator species Noccaea caerulescens and on its phytoextraction capacity were investigated. A field experiment was conducted by direct sowing of N. caerulescens seeds on a plot of contaminated Technosols in Jeandelaincourt, France. At the same time, seeds were sown on potting soil under controlled conditions. One month later, the seedlings were transplanted to the field. One year later, the results showed that transplanting improved the establishment and growth of N. caerulescens. This was due to a decrease in soil pH in the rhizosphere, which subsequently increased nutrient availability. This change in rhizosphere properties also appeared to be the key that improved microbial activities in the rhizosphere soil of transplanted plants. The observed improvement in both rhizosphere nutrient availability and microbial activities, in turn, increased auxin concentrations in the rhizosphere and consequently a more developed root system was observed in the transplanted plants. Furthermore, the Cd and Zn phytoextraction yield of transplanted plants is 2.5 and 5 times higher, respectively, than that of sown plants. In conclusion, N. caerulescens transplantation on contaminated sites seems to be an adequate strategy to improve plant growth and enhance trace metal phytoextraction.
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Affiliation(s)
- Ali Kanso
- Lebanese University, Applied Plant Biotechnology Laboratory, Hadath, Lebanon; Université de Lorraine, INRAE, LSE, F-54000, Nancy, France
| | - Emile Benizri
- Université de Lorraine, INRAE, LSE, F-54000, Nancy, France
| | - Sabine Azoury
- Lebanese University, Applied Plant Biotechnology Laboratory, Hadath, Lebanon
| | - Guillaume Echevarria
- Université de Lorraine, INRAE, LSE, F-54000, Nancy, France; Centre for Mined Land Rehabilitation, SMI, University of Queensland, St Lucia, QLD, Australia
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Ancousture J, Durand A, Blaudez D, Benizri E. A reduced but stable core microbiome found in seeds of hyperaccumulators. Sci Total Environ 2023; 887:164131. [PMID: 37182771 DOI: 10.1016/j.scitotenv.2023.164131] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 05/09/2023] [Accepted: 05/09/2023] [Indexed: 05/16/2023]
Abstract
The seed microbiota is currently of great interest in the scientific community since seed germination is a critical stage in plant life cycle. Some seed endophytic bacteria could be commonly found in seeds of hyperaccumulating plants and may confer them an evolutionary advantage over non-hyperaccumulating plants when confronted to biotic or abiotic stress. This study focuses on the endophytic bacterial diversity of a wide diversity of metal hyperaccumulating and non-hyperaccumulating plants (93 seed samples from Mediterranean regions, Oceania, South-East Asia) to reveal the core endophyte communities specific of hyperaccumulating plants. The rather low richness of the seed bacterial communities found in all seeds suggest that a sub-population of specialized endophytic strains is able to colonize seeds and survive. The factor that shapes the diversity of those bacterial communities was first the botanical family and secondly the hyperaccumulation trait of the host plants. Based on the taxonomic affiliation, we revealed that the Brassicales had 1349 OTUs that were specific to them and the Asterales 204 OTUs, independently of their metal accumulation strategy. Nonetheless, a set of 12 OTUs were shared by the seeds of all the hyperaccumulators independently of the taxonomic order of the plants (among Asterales and Brassicales) and could be considered as a 'stable' core microbiome. Those OTUs identified as Luteibacter, Alphaproteobacteria unclassified, Sphingopyxis, Alishewanella, bacteria unclassified, Heliimonas, Aeromicrobium, Proteobacteria unclassified, Xanthomonadales unclassified and Micromonosporaceae unclassified may constitute an endophytic bacterial core with PGP traits. Further studies are needed to extend our knowledge of the possible role played by those bacteria.
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Affiliation(s)
| | - Alexis Durand
- Université de Lorraine, INRAE, LSE, F-54000 Nancy, France
| | - Damien Blaudez
- Université de Lorraine, CNRS, LIEC, F-54000 Nancy, France
| | - Emile Benizri
- Université de Lorraine, INRAE, LSE, F-54000 Nancy, France.
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Jacquet J, Benizri E, Echevarria G, Sirguey C. New insights on glass industry wasteland ecosystems. Environ Pollut 2022; 315:120431. [PMID: 36244497 DOI: 10.1016/j.envpol.2022.120431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 09/19/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Glass manufacturing operations lead to an increasing number of abandoned slag heaps contaminated with metallic trace elements (MTE). However, the relative influence of edaphic factors on the biodiversity of glasswork wastelands is still poorly understood although closely related to sustainable land management practices. Therefore, the objectives of this research were to provide new insights into glasswork wastelands through the investigation of (i) Orthoptera, diurnal Lepidoptera, plant communities, and (ii) abiotic parameters in the topsoils. To that end, biodiversity indices were computed from ecological inventories performed on the herbaceous layer. In addition, soil samples were taken from the topsoil layer (0-10 cm) to assess agronomic properties, actually (CEC-exchangeable) and potentially bioavailable MTE fractions (DTPA-extractable) and pseudo-total MTE contents. On the one hand, the studied site was able to support a substantially higher than excepted biodiversity with orthopteran assemblages similar to grasslands and a diurnal Lepidoptera diversity comparable to urban parks. We also noted a positive influence of plant richness on the diurnal Lepidoptera community structure. On the other hand, topsoil analysis revealed a severe Pb contamination (1800-3100 mg kg-1) and a high potentially bioavailable Pb fraction (800-1300 mg kg-1). However, CEC-exchangeable MTE concentrations were all below the analytical quantification limits. Moreover, the site was characterized by a medium soil fertility. From these results, Pb contamination does not appear to be a primary limiting factor for the establishment of these communities. We assume that glasswork wasteland ecosytems are more affected by soil fertility or land management practices. To conclude, these sites are able to provide biodiversity ecosystem services, acting as wildlife sanctuaries for Orthoptera and diurnal Lepidoptera, and strategic metals by phytoextraction in a circular economy model. Thus, wasteland management practices should consider the local-scale drivers of biodiversity in order to reach at least the zero net loss of biodiversity.
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Affiliation(s)
- Julien Jacquet
- Econick, 1 Rue Grandville, 54000, Nancy, France; Université de Lorraine, INRAE, LSE, 54000, Nancy, France
| | - Emile Benizri
- Université de Lorraine, INRAE, LSE, 54000, Nancy, France
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Lopez S, Morel JL, Benizri E. The parameters determining hyperaccumulator rhizobacteria diversity depend on the study scale. Sci Total Environ 2022; 834:155274. [PMID: 35452722 DOI: 10.1016/j.scitotenv.2022.155274] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 03/23/2022] [Accepted: 04/10/2022] [Indexed: 06/14/2023]
Abstract
Soils harbor some of the most diverse microbiomes on Earth and are essential for both nutrient cycling and carbon storage. Numerous parameters, intrinsic to plant physiology, life history and the soil itself, can influence the structure of rhizomicrobial communities. While our knowledge of rhizosphere microbial diversity is increasing, opinion is divided as to whether the factors that most impact this diversity are abiotic, climatic or plant selection. Here we focused on the rhizosphere bacterial diversity of nickel hyperaccumulator plants (28 species from Mediterranean or tropical climates). We showed, by leveraging 16S Illumina sequencing of 153 ultramafic rhizosphere soils, that bacterial genetic diversity was highest in Mediterranean habitats where plant diversity was the lowest. Concerning those parameters driving this diversity, we demonstrated that climate drives bacterial diversity, in particular with the annual temperature variation. Focusing on each region, we underlined the substantial role of soil physicochemical parameters. Our results highlight the importance of considering spatial scale when explaining bacterial community diversity.
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Affiliation(s)
- Séverine Lopez
- INRAE, Bordeaux Sciences Agro, ISVV, SAVE, F-33140 Villenave d'Ornon, France; Université de Lorraine, INRAE, Laboratoire Sols et Environnement, 54000 Nancy, France
| | - Jean Louis Morel
- Université de Lorraine, INRAE, Laboratoire Sols et Environnement, 54000 Nancy, France
| | - Emile Benizri
- Université de Lorraine, INRAE, Laboratoire Sols et Environnement, 54000 Nancy, France.
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Lopez S, van der Ent A, Sumail S, Sugau JB, Buang MM, Amin Z, Echevarria G, Morel JL, Benizri E. Bacterial community diversity in the rhizosphere of nickel hyperaccumulator plant species from Borneo Island (Malaysia). Environ Microbiol 2020; 22:1649-1665. [PMID: 32128926 DOI: 10.1111/1462-2920.14970] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/27/2020] [Accepted: 03/01/2020] [Indexed: 12/01/2022]
Abstract
The Island of Borneo is a major biodiversity hotspot, and in the Malaysian state of Sabah, ultramafic soils are extensive and home to more than 31 endemic nickel hyperaccumulator plants. The aim of this study was to characterize the structure and the diversity of the rhizosphere bacterial communities of several of these nickel hyperaccumulator plants and factors that affect these bacterial communities in Sabah. The most abundant phyla were Proteobacteria, Acidobacteria and Actinobacteria. At family level, Burkholderiaceae and Xanthobacteraceae (Proteobacteria phylum) were the most abundant families in the hyperaccumulator rhizospheres. Redundancy analysis based on soil chemical analyses and relative abundances of the major bacterial phyla showed that abiotic factors of the studied sites drove the bacterial diversity. For all R. aff. bengalensis rhizosphere soil samples, irrespective of studied site, the bacterial diversity was similar. Moreover, the Saprospiraceae family showed a high representativeness in the R. aff. bengalensis rhizosphere soils and was linked with the nickel availability in soils. The ability of R. aff. bengalensis to concentrate nickel in its rhizosphere appears to be the major factor driving the rhizobacterial community diversity unlike for other hyperaccumulator species.
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Affiliation(s)
- Séverine Lopez
- Université de Lorraine, INRAE, Laboratoire Sols et Environnement, 54000, Nancy, France
| | - Antony van der Ent
- Université de Lorraine, INRAE, Laboratoire Sols et Environnement, 54000, Nancy, France.,Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, 4072, QLD, Australia
| | | | | | - Matsain Mohd Buang
- Forest Research Centre, Sabah Forestry Department, Sandakan, Sabah, Malaysia
| | - Zarina Amin
- Biotechnology Research Institute, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
| | - Guillaume Echevarria
- Université de Lorraine, INRAE, Laboratoire Sols et Environnement, 54000, Nancy, France.,Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, St Lucia, 4072, QLD, Australia
| | - Jean Louis Morel
- Université de Lorraine, INRAE, Laboratoire Sols et Environnement, 54000, Nancy, France
| | - Emile Benizri
- Université de Lorraine, INRAE, Laboratoire Sols et Environnement, 54000, Nancy, France
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Maubert A, Frey S, Rahili A, Filippi J, Benizri E. Acute esophageal necrosis: Case report of an unknown entity. Int J Surg Case Rep 2019; 61:188-190. [PMID: 31376741 PMCID: PMC6677686 DOI: 10.1016/j.ijscr.2019.07.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 07/12/2019] [Accepted: 07/17/2019] [Indexed: 01/29/2023] Open
Abstract
Acute esophageal necrosis is an unknown entity because it is a rare disease. Management including different specialties. Time is necessary and surgery is not the only therapy.
Introduction Acute Esophageal Necrosis Syndrome (AENS) is a rare and unknown clinical entity, defined as a diffuse circumferential black-appearing friable esophageal mucosa going from the distal esophageal mucosa to the gastroesophageal (GE) junction. Esophagogastroduodenoscopy (EGD) remains the gold standard in making diagnosis. Presentation of case We report here the case of a 45-year-old man with necrosis of the esophagus treated conservatively. Regression of the lesion but persistence of ulcerations were seen on the endoscopic follow-up. Distal esophageal stenosis was then diagnosed and treated by endoscopic dilation. Discussion Diagnosis of AENS must be considered when an old patient, with multiple comorbidities, presents an upper digestive hemorrhage. Upper endoscopy is mandatory. Treatment is in most of the cases conservative. Esophageal stenosis is a frequent complication. Conclusion Although AENS is a rare clinical entity, it should not be dismissed by doctors, avoiding useless surgical management. This pathology remains nevertheless associated with a considerable mortality rate.
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Affiliation(s)
- A Maubert
- Service de Chirurgie Générale et Cancérologie Digestive, Centre Hospitalier Universitaire de Nice, Hôpital de l'Archet 2, France.
| | - S Frey
- Service de Chirurgie Générale et Cancérologie Digestive, Centre Hospitalier Universitaire de Nice, Hôpital de l'Archet 2, France
| | - A Rahili
- Service de Chirurgie Générale et Cancérologie Digestive, Centre Hospitalier Universitaire de Nice, Hôpital de l'Archet 2, France
| | - J Filippi
- Service de Gastro-Entérologie, Centre Hospitalier Universitaire de Nice, Hôpital de l'Archet 2, France
| | - E Benizri
- Service de Chirurgie Générale et Cancérologie Digestive, Centre Hospitalier Universitaire de Nice, Hôpital de l'Archet 2, France
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Maubert A, Birtwisle L, Bernard JL, Benizri E, Bereder JM. Can machine learning predict resecability of a peritoneal carcinomatosis? Surg Oncol 2019; 29:120-125. [PMID: 31196475 DOI: 10.1016/j.suronc.2019.04.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 04/28/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Approximately 20% of initially eligible patients in a HIPEC procedure eventually underwent a simple surgical exploration. These procedures are called 'open & close' (O & C) representing up to 48% of surgery. The objective of this study was to predict the resecability of peritoneal carcinomatosis using a machine-learning model for decision-making support, for eligible patients of HIPEC. METHODS The study was conducted as an intention to treat based on three databases including a prospective, between January 2000 and December 2015. A propensity score allowed us to obtain two groups of comparable and matched patients. Subsequently, several algorithm models of classification were studied (simple classification, conditional tree, support vector machine, random forest) to determine the model having the best performance and accuracy. RESULTS Two groups of 155 patients were obtained: one group without resection and one group with resection. Nine criteria of non-resecability reflecting the organ involvement have been retained. They were coded according to their importance. Five classification algorithms were tested. The training data included 218 patients and 92 test data. The random forest model exhibited the best performance with an accuracy of close to 98%. Only two errors of predictions were observed. DISCUSSION The largest number of patients will allow us to improve the precision prediction. Gathering more data such as biologic, radiologic, and even laparoscopic features, should improve the knowledge of the disease and decrease the number of 'O & C' procedures.
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Affiliation(s)
- A Maubert
- General and Oncology Surgery Unit, Archet 2 Hospital, University Hospital of Nice, Nice, France.
| | - L Birtwisle
- General and Oncology Surgery Unit, Archet 2 Hospital, University Hospital of Nice, Nice, France
| | - J L Bernard
- General and Oncology Surgery Unit, Archet 2 Hospital, University Hospital of Nice, Nice, France
| | - E Benizri
- General and Oncology Surgery Unit, Archet 2 Hospital, University Hospital of Nice, Nice, France
| | - J M Bereder
- General and Oncology Surgery Unit, Archet 2 Hospital, University Hospital of Nice, Nice, France
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Lopez S, Goux X, Echevarria G, Calusinska M, Morel JL, Benizri E. Community diversity and potential functions of rhizosphere-associated bacteria of nickel hyperaccumulators found in Albania. Sci Total Environ 2019; 654:237-249. [PMID: 30445325 DOI: 10.1016/j.scitotenv.2018.11.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 07/22/2018] [Revised: 10/25/2018] [Accepted: 11/04/2018] [Indexed: 06/09/2023]
Abstract
Ultramafic (i.e. serpentine) soils are widespread in the Balkans and particularly in Albania. They account for a large part of plant endemism in that region and host several hyperaccumulator species, which are characterized by leaf nickel concentrations frequently above 1%. This rich nickel hyperaccumulating flora could serve as candidate to be used in phytoextraction and agromining. Despite recent interest in metal hyperaccumulating plants and agromining, very few studies have investigated the bacterial diversity and the influence of environmental factors on microbial gene profiles in the rhizosphere of hyperaccumulator plants growing on ultramafic soils. Because rhizospheric bacteria could be crucial to the success of phytoremediation, we studied a total of 48 nickel-hyperaccumulating plants which were sampled from four species that are widespread in Albania: Noccaea ochroleuca, Odontarrhena smolikana, O. rigida and O. chalcidica. All samples were taken from the ultramafic regions of Librazhd and Pogradec in eastern Albania in October 2015. Our study shows that Proteobacteria, Actinobacteria and Acidobacteria dominated the soil bacterial communities. Of these three phyla, only Proteobacteria was relatively abundant. This study underlines the influence of soil Cation Exchange Capacity on the bacterial community's diversity and structure. Based on the predicted metagenomes, the genes belonging to amino acid, lipid and carbohydrate metabolisms were identified as major gene families. Our study sheds some light on our understanding of how bacterial communities are structured within and affect the rhizosphere of hyperaccumulator plants from ultramafic soils in Albania.
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Affiliation(s)
- Séverine Lopez
- Université de Lorraine, INRA, Laboratoire Sols et Environnement, 54000 Nancy, France
| | - Xavier Goux
- Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 4422 Belvaux, Luxembourg
| | - Guillaume Echevarria
- Université de Lorraine, INRA, Laboratoire Sols et Environnement, 54000 Nancy, France
| | - Magdalena Calusinska
- Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 4422 Belvaux, Luxembourg
| | - Jean Louis Morel
- Université de Lorraine, INRA, Laboratoire Sols et Environnement, 54000 Nancy, France
| | - Emile Benizri
- Université de Lorraine, INRA, Laboratoire Sols et Environnement, 54000 Nancy, France.
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Saad RF, Kobaissi A, Echevarria G, Kidd P, Calusinska M, Goux X, Benizri E. Influence of new agromining cropping systems on soil bacterial diversity and the physico-chemical characteristics of an ultramafic soil. Sci Total Environ 2018; 645:380-392. [PMID: 30029117 DOI: 10.1016/j.scitotenv.2018.07.106] [Citation(s) in RCA: 4] [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: 05/24/2018] [Revised: 07/09/2018] [Accepted: 07/09/2018] [Indexed: 06/08/2023]
Abstract
Most of the research dedicated to agromining has focused on cultivating a single hyperaccumulator plant, although plant diversity has been shown to positively modify soil characteristics. Hence, we compared the effect of cropping a nickel-hyperaccumulator Alyssum murale with a legume (Vicia sativa) to A. murale's mono-culture, on the bacterial diversity and physico-chemical characteristics of an ultramafic soil. A pot experiment with 5 replicates was conducted in controlled conditions for 11 months. The treatments studied were: co-cropping and rotation vs. mineral fertilization controls and bare soil. The introduction of legumes induced a clearly positive effect on the soil's microbial biomass carbon and nitrogen. Arylsulfatase and urease activities tended to be enhanced in the co-cropping and rotation treatments and to be lessened in the mineral fertilization treatments. However, β-glucosidase and phosphatase activities were seen to decrease when legumes were used. Our results showed that the rotation treatment induced a higher organic matter content than the fertilized control did. Actinobacteria was the most-represented bacterial phyla and had lower relative abundance in treatments associating legumes. Conversely, the relative abundance of Acidobacteria and Gemmatimonadetes phyla increased but not significantly in treatments with legumes. The relative abundance of Chloroflexi phylum was shown to be significantly higher for the fertilized rotation control. The relative abundance of β-Proteobacteria subphylum increased but not significantly in treatments with legumes. NMDS analysis showed a clear separation between planted treatments and bare soil and between co-cropping and rotation and fertilized controls. Shannon index showed reduction in microbial diversity that was mainly due to chemical inputs in the soil. This study showed that these new cropping systems influenced both the bacterial diversity and the physico-chemical characteristics of an ultramafic soil. In addition, this study provides evidence that mineral fertilization can negatively impact bacterial communities and some of their functions linked to biogeochemical cycles.
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Affiliation(s)
- Ramez F Saad
- Université de Lorraine, INRA, Laboratoire Sols et Environnement, 54000 Nancy, France; Université Libanaise, Laboratoire «Applied Plant Biotechnology», Faculté des Sciences 1, Beyrouth, Lebanon
| | - Ahmad Kobaissi
- Université Libanaise, Laboratoire «Applied Plant Biotechnology», Faculté des Sciences 1, Beyrouth, Lebanon
| | - Guillaume Echevarria
- Université de Lorraine, INRA, Laboratoire Sols et Environnement, 54000 Nancy, France
| | - Petra Kidd
- Instituto de Investigaciones Agrobiológicas de Galicia (IIAG), Consejo Superior de Investigaciones Científicas (CSIC), Santiago de Compostela 15706, Spain
| | - Magdalena Calusinska
- Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 4422 Belvaux, Luxembourg
| | - Xavier Goux
- Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 4422 Belvaux, Luxembourg
| | - Emile Benizri
- Université de Lorraine, INRA, Laboratoire Sols et Environnement, 54000 Nancy, France.
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Kanso A, Azoury S, Benizri E, Kobaissi A, Echevarria G, Sirguey C. Improvement of Ni phytoextraction by Alyssum murale and its rhizosphere microbial activities by applying nitrogen fertilizer. Ecol Res 2018. [DOI: 10.1007/s11284-018-1630-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Bani A, Pavlova D, Benizri E, Shallari S, Miho L, Meco M, Shahu E, Reeves R, Echevarria G. Relationship between the Ni hyperaccumulator Alyssum murale and the parasitic plant Orobanche nowackiana from serpentines in Albania. Ecol Res 2018. [DOI: 10.1007/s11284-018-1593-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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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Goux X, Calusinska M, Fossépré M, Benizri E, Delfosse P. Start-up phase of an anaerobic full-scale farm reactor - Appearance of mesophilic anaerobic conditions and establishment of the methanogenic microbial community. Bioresour Technol 2016; 212:217-226. [PMID: 27099947 DOI: 10.1016/j.biortech.2016.04.040] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 04/08/2016] [Accepted: 04/10/2016] [Indexed: 05/07/2023]
Abstract
The goal of this study was to investigate how the microbial community structure establishes during the start-up phase of a full-scale farm anaerobic reactor inoculated with stale and cold cattle slurry. The 16S/18S high-throughput amplicon sequencing results showed an increase of the bacterial, archaeal and eukaryotic diversity, evenness and richness during the settlement of the mesophilic anaerobic conditions. When a steady performing digestion process was reached, the microbial diversity, evenness and richness decreased, indicating the establishment of a few dominant microbial populations, best adapted to biogas production. Interestingly, among the environmental parameters, the temperature, alkalinity, free-NH3, total solids and O2 content were found to be the main drivers of microbial dynamics. Interactions between eukaryotes, characterized by a high number of unknown organisms, and the bacterial and archaeal communities were also evidenced, suggesting that eukaryotes might play important roles in the anaerobic digestion process.
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Affiliation(s)
- Xavier Goux
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 rue du Brill, L-4422 Belvaux, Luxembourg; Laboratoire Sols et Environnement, Université de Lorraine, UMR 1120, 2 avenue de la Forêt de Haye, TSA 40602, F-54518 Vandœuvre-lès-Nancy, France; INRA, Laboratoire Sols et Environnement, UMR 1120, 2 avenue de la Forêt de Haye, TSA 40602, F-54518 Vandœuvre-lès-Nancy, France
| | - Magdalena Calusinska
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 rue du Brill, L-4422 Belvaux, Luxembourg
| | - Marie Fossépré
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 rue du Brill, L-4422 Belvaux, Luxembourg
| | - Emile Benizri
- Laboratoire Sols et Environnement, Université de Lorraine, UMR 1120, 2 avenue de la Forêt de Haye, TSA 40602, F-54518 Vandœuvre-lès-Nancy, France; INRA, Laboratoire Sols et Environnement, UMR 1120, 2 avenue de la Forêt de Haye, TSA 40602, F-54518 Vandœuvre-lès-Nancy, France
| | - Philippe Delfosse
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 41 rue du Brill, L-4422 Belvaux, Luxembourg.
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Goux X, Calusinska M, Lemaigre S, Marynowska M, Klocke M, Udelhoven T, Benizri E, Delfosse P. Microbial community dynamics in replicate anaerobic digesters exposed sequentially to increasing organic loading rate, acidosis, and process recovery. Biotechnol Biofuels 2015; 8:122. [PMID: 26288654 PMCID: PMC4539856 DOI: 10.1186/s13068-015-0309-9] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/07/2015] [Indexed: 05/18/2023]
Abstract
BACKGROUND Volatile fatty acid intoxication (acidosis), a common process failure recorded in anaerobic reactors, leads to drastic losses in methane production. Unfortunately, little is known about the microbial mechanisms underlining acidosis and the potential to recover the process. In this study, triplicate mesophilic anaerobic reactors of 100 L were exposed to acidosis resulting from an excessive feeding with sugar beet pulp and were compared to a steady-state reactor. RESULTS Stable operational conditions at the beginning of the experiment initially led to similar microbial populations in the four reactors, as revealed by 16S rRNA gene T-RFLP and high-throughput amplicon sequencing. Bacteroidetes and Firmicutes were the two dominant phyla, and although they were represented by a high number of operational taxonomic units, only a few were dominant. Once the environment became deterministic (selective pressure from an increased substrate feeding), microbial populations started to diverge between the overfed reactors. Interestingly, most of bacteria and archaea showed redundant functional adaptation to the changing environmental conditions. However, the dominant Bacteroidales were resistant to high volatile fatty acids content and low pH. The severe acidosis did not eradicate archaea and a clear shift in archaeal populations from acetotrophic to hydrogenotrophic methanogenesis occurred in the overfed reactors. After 11 days of severe acidosis (pH 5.2 ± 0.4), the process was quickly recovered (restoration of the biogas production with methane content above 50 %) in the overfed reactors, by adjusting the pH to around 7 using NaOH and NaHCO3. CONCLUSIONS In this study we show that once the replicate reactors are confronted with sub-optimal conditions, their microbial populations start to evolve differentially. Furthermore the alterations of commonly used microbial parameters to monitor the process, such as richness, evenness and diversity indices were unsuccessful to predict the process failure. At the same time, we tentatively propose the replacement of the dominant Methanosaeta sp. in this case by Methanoculleus sp., to be a potential warning indicator of acidosis.
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Affiliation(s)
- Xavier Goux
- />Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, 4422 Belvaux, Luxembourg
- />Laboratoire Sols et Environnement, UMR 1120, Université de Lorraine, 2 avenue de la Forêt de Haye, TSA 40602, 54518 Vandœuvre-lès-Nancy, France
- />Laboratoire Sols et Environnement, UMR 1120, INRA, 2 avenue de la Forêt de Haye, TSA 40602, 54518 Vandœuvre-lès-Nancy, France
| | - Magdalena Calusinska
- />Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, 4422 Belvaux, Luxembourg
| | - Sébastien Lemaigre
- />Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, 4422 Belvaux, Luxembourg
| | - Martyna Marynowska
- />Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, 4422 Belvaux, Luxembourg
| | - Michael Klocke
- />Department Bioengineering, Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Max-Eyth-Allee 100, 14469 Potsdam, Germany
| | - Thomas Udelhoven
- />Fachbereich VI- Raum- und Umweltwissenschaften, Umweltfernerkundung & Geoinformatik, Universität Trier, 54286 Trier, Germany
| | - Emile Benizri
- />Laboratoire Sols et Environnement, UMR 1120, Université de Lorraine, 2 avenue de la Forêt de Haye, TSA 40602, 54518 Vandœuvre-lès-Nancy, France
- />Laboratoire Sols et Environnement, UMR 1120, INRA, 2 avenue de la Forêt de Haye, TSA 40602, 54518 Vandœuvre-lès-Nancy, France
| | - Philippe Delfosse
- />Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, 4422 Belvaux, Luxembourg
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Cregut M, Piutti S, Slezack-Deschaumes S, Benizri E. Compartmentalization and regulation of arylsulfatase activities in Streptomyces sp., Microbacterium sp. and Rhodococcus sp. soil isolates in response to inorganic sulfate limitation. Microbiol Res 2012; 168:12-21. [PMID: 22921900 DOI: 10.1016/j.micres.2012.08.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 07/27/2012] [Accepted: 08/02/2012] [Indexed: 10/28/2022]
Abstract
Arylsulfatases allow microorganisms to satisfy their sulfur (S) requirements as inorganic sulfate after sulfate ester hydrolysis. Our objectives were to investigate the arylsulfatase activities among soil isolates, especially Streptomyces sp., Microbacterium sp. and Rhodococcus sp., because such investigations are limited for these bacteria, which often live in sulfate-limited conditions. Physiological and biochemical analyses indicated that these isolates possessed strong specific arylsulfatase activities ranging from 6 to 8 U. Moreover, for Streptomyces sp., an arylsulfatase localization study revealed 2 forms of arylsulfatases. A first form was located in the membrane, and a second form was located in the intracellular compartment. Both arylsulfatases had different patterns of induction. Indeed, the intracellular arylsulfatase was strictly induced by inorganic sulfate limitation, whereas the membrane arylsulfatase was induced both by substrate presence or S demand independently. For Microbacterium and Rhodococcus isolates, only a membrane arylsulfatase was found. Consequently, our results suggest the presence of a previously undescribed arylsulfatase in these microorganisms that allows them to develop an alternative strategy to fulfill their S requirements compared to bacteria previously studied in the literature.
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Affiliation(s)
- Mickael Cregut
- Nantes University, PRES UNAM, Campus de la Courtaisière-IUT, UMR CNRS 6144 GEPEA, CBAC, 18 Bvd Gaston Defferre, 85035 La Roche sur Yon cedex, France.
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16
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Bréaud J, Chevallier D, Benizri E, Fournier JP, Carles M, Delotte J, Venissac N, Myx A, Ianelli A, Levraut J, Jones D, Benchimol D. The place of simulation in the surgical resident curriculum. The pedagogic program of the Nice Medical School Simulation Center. J Visc Surg 2012; 149:e52-60. [PMID: 22285517 DOI: 10.1016/j.jviscsurg.2011.12.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
INTRODUCTION Surgical training relies on medical school lectures, practical training in patient care and in the operating room including instruction in anatomy and experimental surgery. Training with different techniques of simulators can complete this. Simulator-based training, widely used in North America, can be applied to several aspects of surgical training without any risk for patients: technical skills in both open and laparoscopic surgery, the notion of teamwork and the multidisciplinary management of acute medicosurgical situations. METHOD We present the curriculum developed in the Simulation Center of the Medical School of Nice Sophia-Antipolis. All residents in training at the Medical School participate in this curriculum. RESULTS Each medical student is required to pursue theoretical training (familiarization with the operating room check-list), training in patient management using a high fidelity mannequin for various medical and surgical scenarios and training in technical gestures in open and laparoscopic surgery over a 2-year period, followed by an examination to validate all technical aptitudes. This curriculum has been approved and accredited by the prestigious American College of Surgeons, making this the first of its kind in France. CONCLUSION As such, it should be considered as a model and, in accordance to the wishes of the French Surgical Academy, the first step toward the creation of true schools of surgery.
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Affiliation(s)
- J Bréaud
- Centre de simulation médicale, faculté de médecine de Nice, université de Nice Sophia-Antipolis, France.
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Baize N, Mahamat A, Benizri E, Saint-Paul MC, Mounier N. Bone metastasis from endometrioid ovarian carcinoma: a case study and literature review. EUR J GYNAECOL ONCOL 2009; 30:326-328. [PMID: 19697633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
INTRODUCTION Bone metastases from epithelial ovarian carcinoma are rare, usually discovered postmortem. The survival of these patients is poor. Furthermore, only two cases of endometrioid ovarian carcinoma with metastasis to the skeletal structures have been described in the literature. CASE REPORT We present the case of a 58-year-old woman with a lytic metastasis in the left iliac ramus from endometrioid ovarian carcinoma that occurred seven years after the initial diagnosis. DISCUSSION A review of the literature since 1966 on bone metastasis of ovarian cancer is also presented. In patients suffering from a neoplasm that rarely metastasises to bone, histological proof should be obtained to diagnose uncommon sites of disease relapse.
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Affiliation(s)
- N Baize
- Onco-Haematology Department, Archet Hospital, Nice, France
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18
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Renault D, Déniel F, Benizri E, Sohier D, Barbier G, Rey P. Characterization of Bacillus and Pseudomonas strains with suppressive traits isolated from tomato hydroponic-slow filtration unit. Can J Microbiol 2007; 53:784-97. [PMID: 17668039 DOI: 10.1139/w07-046] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bacillus and Pseudomonas spp. are known to be involved in plant pathogenic fungi elimination during the slow filtration process used in tomato soilless cultures. We isolated 6-8 strains of both Bacillus and Pseudomonas from the top, middle, and bottom sections of filters and identified them after 16S rDNA sequencing. Four Pseudomonas strains were identified as Pseudomonas fulva, 5 as Pseudomonas plecoglossicida, and 12 as Pseudomonas putida. The use of specific oligonucleotide polymerase chain reaction primer sets designed from gyrB gene sequences additionally permitted the identification of 17 Bacillus cereus and 3 Bacillus thuringiensis strains. Ribotyping with EcoRI pointed out an important polymorphism within Bacillus and Pseudomonas strains. Molecular characterization did not reveal a correlation between the location of isolates within the filter (top, middle, or bottom) and bacterial identification or riboclusters. Functional aspects assessed by community-level physiological profiling showed marked phenotypic differences between Pseudomonas communities isolated from the top and bottom filter layers; differences were lower between Bacillus communities of different layers and far less noticeable between mixed communities of Bacillus and Pseudomonas. These strains were tested for several suppressive activities. Conversely to most Bacillus, the majority of Pseudomonas strains were auxin producers and promoted the growth of tomato plantlet roots. On the other hand, only Bacillus strains displayed antagonistic activities by inhibiting the growth of pathogenic fungi frequently detected in soilless cultures. Siderophores were produced by nearly all bacteria, but at higher amounts by Pseudomonas than Bacillus strains. The biocontrol agent potentiality of certain strains to optimize the slow filtration process and to promote the suppressive potential of nutrient solution is discussed.
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Affiliation(s)
- D Renault
- Laboratoire de Biodiversité and Ecologie Microbienne (EA 3882), ESMISAB, Université de Bretagne Occidentale-Brest, Technopôle Brest-Iroise, 29280 Plouzané, France
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19
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Aboudrar W, Schwartz C, Benizri E, Morel JL, Boularbah A. Soil microbial diversity as affected by the rhizosphere of the hyperaccumulator Thlaspi caerulescens under natural conditions. Int J Phytoremediation 2007; 9:41-52. [PMID: 18246714 DOI: 10.1080/15226510601139417] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
It is hypothesized that metal hyperaccumulator plants have specific rhizosphere conditions, potentially modifying the bioavailability of soil metals. This article aims to further the knowledge about the rhizosphere of the hyperaccumulator Thlaspi caerulescens, focusing on its microflora isolated from metalliferous soils collected in situ where the plants grow naturally. We characterized the cultivable microbial communities isolated from the rhizosphere of one population of this Ni hyperaccumulator species grown on a serpentine soil. The rhizosphere soil harbored a wide variety of microorganisms, predominantly bacteria, confirming the stimulatory effect of the T. caerulescens rhizosphere on microbial growth and proliferation. We tested the hypothesis that the rhizosphere of T. caerulescens influences (1) the metabolic diversity of the bacterial community and (2) the bacterial resistance to metals. The principal component analysis of the Biolog plate's data confirmed a structural effect of the rhizosphere of T. caerulescens on bacterial communities. The percentage of Ni-resistant bacteria was higher in the rhizosphere than in the bulk soil, suggesting a direct effect of the rhizosphere on Ni tolerance, reflecting a greater bacterial tolerance to Ni in the rhizosphere.
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Affiliation(s)
- W Aboudrar
- University Cadi Ayyad, Faculté des Sciences et Techniques Marrakech, Département de Biologie, Marrakech, Morocco.
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20
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Trastour C, Rahili A, d'Angelo L, Bafghi A, Benizri E, Bongain A, Benchimol D. [Bening enterogenital fistulas arising from the digestive tract: three cases]. ACTA ACUST UNITED AC 2006; 35:720-4. [PMID: 17088774 DOI: 10.1016/s0368-2315(06)76469-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Fistulas between the female genital tract and the digestive tract occur after obstetrical, oncological, or post-operative complications. We report herein 3 rare cases of enterogenital fistulas: one colouterine fistula and one colotubal fistula in a patient with diverticulitis, and one ileovaginal fistula in a patient with Crohn's disease. Vaginal discharge was frequent and incited patients to consult a gynecologist. Better knowledge of enterogenital fistulas is necessary to enable earlier diagnosis and apply specific treatment. The incidence of colovaginal fistulas is increasing in diverticular disease because of increased prevalences of hysterectomies and diverticular disease.
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Affiliation(s)
- C Trastour
- Département de Gynécologie-Obstétrique-Infertilité et Médecine Foetale, Hôpital de l'Archet II, Nice Cedex 3.
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21
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Sautot-Vial N, Rahili A, Karimdjee-Soihili B, Benizri E, Avallone S, Benchimol D. Hepatobiliary and pancreatic: Osteoclast-like giant cell tumor of the pancreas. J Gastroenterol Hepatol 2006; 21:1072. [PMID: 16724999 DOI: 10.1111/j.1440-1746.2006.04523.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- N Sautot-Vial
- Digestive Surgery, CHU Nice, Nice, Côte d'Azur, France
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22
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Elias D, Benizri E, Pocard M, Ducreux M, Boige V, Lasser P. Treatment of synchronous peritoneal carcinomatosis and liver metastases from colorectal cancer. Eur J Surg Oncol 2006; 32:632-6. [PMID: 16621428 DOI: 10.1016/j.ejso.2006.03.013] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2005] [Accepted: 03/02/2006] [Indexed: 01/09/2023] Open
Abstract
AIM To report our experience of peritoneal carcinomatosis (PC) discovered during abdominal exploration in patients with liver metastases (LM). METHODS Liver resection plus cytoreductive surgery were combined in 24 patients with LM and moderate PC from colorectal origin treated with a curative intent between January 1993 and November 2003. RESULTS The mean operative time was 357+/-112 min and median blood loss was 719 ml. One postoperative death occurred and postoperative morbidity was 58%. The mean hospital stay was 21.4+/-4.2 days. Three-year overall and disease-free survival rates were respectively 41.5% (confidence interval [CI]: 23-63) and 23.6% (CI: 11-45). Seven patients are disease-free with a mean follow-up of 27.8 months after their last surgery, 3 having a repeated hepatectomy. Three patients developed a peritoneal recurrence and 13 had recurrence in the liver. The only significant prognostic factor was a number of LMs of less than 3 (p < 0.01). CONCLUSION A combined treatment of LM plus PC is feasible and is beneficial in selected patients presenting three or fewer metastases.
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Affiliation(s)
- D Elias
- Department of Oncologic Digestive Surgery and Digestive Oncology, Institut Gustave Roussy, Cancer Center Hospital, Rue Camille Desmoulins, 94805 Villejuif Cedex, France.
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23
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Bafghi A, Bernard A, Vandenbos F, Benizri E, Bongain A. Multifilament polypropylene vaginal erosion: infection or foreign body-tissue reaction? BJOG 2006. [DOI: 10.1111/j.1471-0528.2006.00900.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Elias D, Manganas D, Benizri E, Dufour F, Menegon P, El Harroudi T, de Baere T. Trans-metastasis hepatectomy: Results of a 21-case study. Eur J Surg Oncol 2006; 32:213-7. [PMID: 16406854 DOI: 10.1016/j.ejso.2005.11.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2005] [Accepted: 11/21/2005] [Indexed: 10/25/2022] Open
Abstract
AIM The aim of this study was to report the feasibility and efficiency of a new approach, called post-RF trans-metastasis hepatectomy (PRFTMH). This technique consists in using RF to first ablate an ill-located liver metastasis (LM) along the planned hepatectomy resection line, the only one possible for volumetric reasons, and then to perform the hepatectomy passing via this initially ablated LM. MATERIAL AND METHODS Twenty-one patients were treated with PRFTMH between January 2000 and May 2004. Thirteen of them had a primary colorectal tumour, four had a primary endocrine tumour and four had miscellaneous primaries. The mean number of LMs per patient was 13.8 (10.7 for primary colorectal tumours and 22.2 for primary endocrine tumours). Pre-operative hypertrophy of the future remaining liver was obtained by selective portal vein embolisation in 11 patients. RESULTS One patient died post-operatively (4.7%) and five developed complications (24%). No local recurrence has occurred at the site of PRFTMH after a median follow-up of 19.4 months (range: 47-7), demonstrating the efficacy of this technique. All patients, except the patient who died post-operatively, are currently alive, and the median survival rate has not yet been attained, after a median follow-up of 19.4 months. CONCLUSION PRFTMH combining RF ablation and trans-metastasis hepatectomy is a new and safe technique, allowing a curative approach to be proposed to some patients with unresectable bilateral LMs.
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Affiliation(s)
- D Elias
- Department of Surgical Oncology, Institut Gustave Roussy, Cancer Center, Villejuif, France.
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25
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Abstract
OBJECTIVE To compare efficacy and long-term morbidity of the TVT between patients younger than 70 years and patients older than 70 years. METHOD Retrospective monocentric study from January 2000 to May 2001. A postal questionnaire was sent to patients to evaluate their satisfaction and their functional status after surgery. RESULTS The study included 154 patients, and 137 (89%) answered the questionnaire. Seventy-two were less than 70 years old (52.5%) and 65 were more than 70 years old (47.5%). The satisfaction rate in the total population was 88.3%. Amongst the patients younger than 70 years, 97.5% were cured or improved, versus 78.5% of the oldest patients (p=0.001). The study within age groups showed that the satisfaction rate between 70-74 years was higher (92.6%) than in the total population and lower after 75 years (66.7%). This difference is linked to the rates of de novo and persistent urge incontinence, which increase after 75 years. CONCLUSION The TVT seems to be a good treatment for urinary incontinence in women younger than 75 years. Patients should be warned that preoperative urge incontinence may persist after surgery.
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Affiliation(s)
- A Bafghi
- Service de Gynécologie-Obstétrique-Reproduction et de Médecine Foetale, Hôpital Archet 2, Nice
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26
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Abstract
With the common use of the tension-free vaginal tape (TVT) procedure, we will probably be facing more and more pathologies that will require a transurethral treatment. We report an intra-operative discovery of a bladder tumor during a cystoscopic TVT procedure. The tumor was easily treated by several transurethral resections without any consequences on the result of the TVT procedure.
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Affiliation(s)
- A Bafghi
- Service de Gynécologie-Obstétrique-Reproduction et de Médecine Foetale, CHU de Nice, Hôpital de l'Archet 2, BP 3079, 151, route de Saint-Antoine-de-Ginestière, 06202 Nice Cedex 3, France
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27
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Baqué P, Karimdjee B, Iannelli A, Benizri E, Rahili A, Benchimol D, Bernard JL, Sejor E, Bailleux S, de Peretti F, Bourgeon A. Anatomy of the presacral venous plexus: implications for rectal surgery. Surg Radiol Anat 2004; 26:355-8. [PMID: 15300413 DOI: 10.1007/s00276-004-0258-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The presacral venous plexus results from anastomoses between the lateral and median sacral veins, and courses into the pelvic fascia covering the anterior aspect of the body of the sacrum. The presacral venous plexus is not directly visible during rectal surgery, and injuries to this plexus may be life-threatening. Dissection of the retrorectal plane or anchoring of the rectum to the sacral promontory as in rectal prolapse surgery exposes the patient to the risk of injury to the presacral venous plexus. The aim of this study was to identify some avascular areas in the anterior aspect of the sacrum in order to lower the occurrence of such injuries during rectal surgery. The pelvis of 10 fresh cadavers was dissected after injection of a colored resin into the inferior vena cava, and the presacral venous plexus was studied. Four avascular tetragonal areas were common to all the specimens. The corners of a square with a side of 3 cm, centered on the anterior aspect of the body of sacrum, were always contained in the avascular areas. The upper side of this square was parallel to a line passing through the sacral promontory, at a 3 cm distance from it. Staples or sutures should be placed in the avascular areas to avoid injuries to the presacral venous plexus.
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Affiliation(s)
- P Baqué
- Laboratoire d'Anatomie Normale, Faculté de Médecine de Nice, 06000 Nice, France.
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28
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Mounier E, Hallet S, Chèneby D, Benizri E, Gruet Y, Nguyen C, Piutti S, Robin C, Slezack-Deschaumes S, Martin-Laurent F, Germon JC, Philippot L. Influence of maize mucilage on the diversity and activity of the denitrifying community. Environ Microbiol 2004; 6:301-12. [PMID: 14871213 DOI: 10.1111/j.1462-2920.2004.00571.x] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In order to understand the effect of the maize rhizosphere on denitrification, the diversity and the activity of the denitrifying community were studied in soil amended with maize mucilage. Diversity of the denitrifying community was investigated by polymerase chain reaction (PCR) amplification of total community DNA extracted from soils using gene fragments, encoding the nitrate reductase (narG) and the nitrous oxide reductase (nosZ), as molecular markers. To assess the underlying diversity, PCR products were cloned and 10 gene libraries were obtained for each targeted gene. Libraries containing 738 and 713 narG and nosZ clones, respectively, were screened by restriction fragment analysis, and grouped based on their RFLP (restriction fragment length polymorphism) patterns. In all, 117 and 171 different clone families have been identified for narG and nosZ and representatives of RFLP families containing at least two clones were sequenced. Rarefaction curves of both genes did not reach a clear saturation, indicating that analysis of an increasing number of clones would have revealed further diversity. Recovered NarG sequences were related to NarG from Actinomycetales and from Proteobacteria but most of them are not related to NarG from known bacteria. In contrast, most of the NosZ sequences were related to NosZ from alpha, beta, and gammaProteobacteria. Denitrifying activity was monitored by incubating the control and amended soils anaerobically in presence of acetylene. The N2O production rates revealed denitrifying activity to be greater in amended soil than in control soil. Altogether, our results revealed that mucilage addition to the soil results in a strong impact on the activity of the denitrifying community and minor changes on its diversity.
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Affiliation(s)
- E Mounier
- UMR INRA 1229 Microbiologie et Géochimie des Sols, 17, rue Sully, B. V. 86510, 21065 Dijon Cedex France
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Di Battista-Leboeuf C, Benizri E, Corbel G, Piutti S, Guckert A. Distribution ofPseudomonassp. populations in relation to maize root location and growth stage. ACTA ACUST UNITED AC 2003. [DOI: 10.1051/agro:2003017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Iannelli A, Fabiani P, Dahman M, Benizri E, Gugenheim J. Small bowel volvulus resulting from a congenital band treated laparoscopically. Surg Endosc 2002; 16:538. [PMID: 11928048 DOI: 10.1007/s00464-001-4237-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2001] [Accepted: 09/27/2001] [Indexed: 10/26/2022]
Abstract
In recent years, laparoscopy has dramatically changed the approach to the patient with acute abdominal pain. We report the case of a patient with small bowel volvulus caused by a congenital band binding the greater omentum to the mesentery, which was promptly diagnosed and treated using laparoscopy. Early intervention averted irreversible ischemic lesions of the intestine and the need for bowel resection. With the routine use of laparoscopy in the setting of acute abdominal pain, rare affections can be easily diagnosed and effectively treated.
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Affiliation(s)
- A Iannelli
- Department of Liver Transplantation, Gastrointestinal and Laparoscopic Surgery, Archet II Hospital, 151 Route Saint-Antoine de Ginestière BP 3079, Nice, Cedex 3, France.
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Abstract
Anterior rectocele is a herniation of the anterior rectal wall into the vagina, which may be either isolated or associated with other pelvic floor disorders. Rectocele could result in outlet obstruction with dyschezia, manual extraction of faeces and/or false incontinence. Rectocele is diagnosed clinically, and can be confirmed by defecography. Other tests may demonstrate associated causes of constipation. Symptomatic rectoceles can be treated via a transrectal route, with two or three layers of plication of the rectal wall and excision of the redundant mucosal flap. The results of transrectal repair are good: short hospital stay, no mortality, morbidity less than 5%, good short- and mid-term results in approximately 80% of cases. Selection criteria in favour of the transrectal approach have not been clearly identified.
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Affiliation(s)
- P Fabiani
- Service de chirurgie digestive, université de Nice, Sophia Antipolis, hôpital Archet 2, France
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Tchiknavorian X, Lagrange JL, Benizri E, Ferrero JM, Chevalier D, Giordana F, Amiel J, Thyss A, Schneider M, Toubol J. Traitement conservateur des tumeurs infiltrantes de vessie de stade T2 à T4, Nx, MO par association et de radiochimiothérapie. Cancer Radiother 1998. [DOI: 10.1016/s1278-3218(98)80062-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Benizri E, Gugenheim J, Lasfar A, Eid P, Blanchard B, Lallemand C, Tovey MG. Prolonged allograft survival in cynomolgus monkeys treated with a monoclonal antibody to the human type I interferon receptor and low doses of cyclosporine. J Interferon Cytokine Res 1998; 18:273-84. [PMID: 9568730 DOI: 10.1089/jir.1998.18.273] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A monoclonal antibody (mAb) directed against the extracellular domain of the IFNAR1 chain of the human interferon-alpha (IFN-alpha) receptor (IFN-alphaR), which inhibits activation of the Jak-Stat signal transduction pathway, administered together with a subeffective dose of cyclosporine induced prolonged survival of skin allografts in major histocompatibility complex (MHC) divergent cynomolgus monkeys. Skin biopsies from animals treated with anti-IFN-alphaR mAb and cyclosporine revealed very low levels of MHC class I and class II antigen expression and the absence of histologic signs of rejection. Monkey antibodies (IgG) to the mouse antihuman IFN-alphaR mAb were not detected in the serum of any of the animals treated with the anti-IFN-alphaR mAb either alone or together with cyclosporine. The anti-IFN-alphaR mAb abrogated activation of the Jak-Stat signal transduction pathway in IFN-treated cells. These results, which show that selective and long-lasting immunosuppression can be obtained by short-term administration of an IFN-alpha antagonist together with a subeffective dose of cyclosporine, may have important implications for the therapy of human allograft rejection.
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Affiliation(s)
- E Benizri
- Laboratoire de Recherches Chirurgicales, Université de Nice Sophia-Antipolis, France
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34
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Chevallier D, Benizri E, Volpé P, Amiel J, Toubol J. [La Peyronie disease. Historical, epidemiological, physiopathological data. Diagnostic and therapeutic approaches]. Rev Med Interne 1997; 18 Suppl 1:41s-45s. [PMID: 9183462 DOI: 10.1016/s0248-8663(97)82714-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The origin of Peyronie's disease remains obscure although the first description dates back to 1743. The prevalence of the disease is 388.6 per 100,000 population. Little physiopathologic data is available. Repeated microtrauma to the tunica albuginea appears to favor the onset of inflammatory phenomena, in turn the source of fibrosis. Clinical examination remains the ideal method for diagnosis and follow-up: it can be completed by ultrasonography of the corpora cavernosa. Magnetic resonance imaging does not appear to provide any significant benefits. The inflammation and pain encountered in early stages of the disease can be managed medically. Numerous treatments have been tested (oral route or local injections); results are in the course of evaluation. In the absence of well-controlled clinical trials, there is no standard medical therapy. Radiotherapy today appears inadvisable. The sequels of Peyronie's disease can be treated surgically, especially in patients who can maintain and adequate erection but suffer from a deformation incompatible with sexual activity. Numerous technical artifices have been proposed; correction of deformations is generally satisfactory but perfections need to be made concerning the quality of erection. Patients with advanced disease and severe erectile insufficiency can be offered reconstructive surgery using penile implants: results of the various procedures are analyzed.
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Abstract
Fournier's gangrene, an anaerobic necrotizing cellulitis of the infradiaphragmatic soft tissues, is a serious pathologic entity with an unpredictable course. From 1978 to 1991, a total of 24 men (mean age, 57 years; range 27 to 90) were treated for this entity at our institution. Diagnosis prompted immediate institution of multimodal treatment combining triple antibiotics, surgical dissection, debridement, and repeated surgical drainage. Fecal diversion (16 patients), hyperbaric oxygenation, and standard intensive care procedures were widely indicated and performed quasi-systematically. The mean interval between initial symptoms and diagnosis was 7.4 days. Lesions were limited to the perineum in 11 patients but extended to the abdomen, thighs, or loins in the remaining 13. The pathogens were identified in 19 patients, and hemoculture results were positive in 5. A coloproctologic origin was identified in 12 patients and a urogenital origin in 4. In 2 patients, perineal gangrene occurred postoperatively, and no etiology was determined for 6. Six patients died, and 18 patients recovered, without any sequelae. The prognosis is better when the patient is young (less than 60 years old), has clinically localized disease, without systemic involvement, and sterile hemocultures and is managed with colostomy. A thorough workup is mandatory to determine the etiology (locoregional lesion, malignancy, hemopathy, arteritis).
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Affiliation(s)
- E Benizri
- Service d'Urologie, Hôpital Pasteur, Nice, France
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36
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Abstract
Type I interferons are potent immuno-modulatory cytokines that enhance expression of the major histocompatibility complex (MHC) class I antigens, T-cell cytotoxicity, and natural killer (NK) cell activity, all of which are implicated in graft rejection. A monoclonal antibody (mAb) directed against the extracellular domain of the human interferon gamma (IFN-gamma) receptor (IFN-alpha R), which inhibits both the binding and biological activity of all the type I IFNs tested, exerted a dose-dependent inhibition of the mixed lymphocyte reaction and induced permanent survival of skin allografts in MHC-divergent Cynomologus monkeys treated with a subeffective dose of cyclosporin A. Marked differences were observed in the composition of T lymphocyte subpopulations in anti-IFN-alpha R mAb-treated animals relative to the various control groups. Skin biopsies from animals treated with anti-IFN-R Mab + cyclosporin A revealed very low levels of MHC class I and class II antigen expression and the absence of histological signs of rejection, whereas skin biopsies from control animals exhibited high levels of MHC antigen expression and the histological signs of acute rejection, including a pronounced lymphocytic infiltrate, edema, and necrosis. No monkey antibodies (IgG) to the mouse anti-human IFN-alpha R mAb were detected in the serum of any of the animals treated with the anti-IFN-alpha R mAb either alone or together with cyclosporin A. Treatment of lethally irradiated Cynomologus monkeys with the anti-IFN-alpha R mAb together with a subeffective dose of cyclosporin A was also found to markedly enhance the survival of animals grafted with allogeneic bone marrow cells from donors differing in both MHC class I and class II antigens. These results show that selective and lasting immunosuppression can be obtained by the short-term administration of an IFN-alpha antagonist together with a subeffective dose of cyclosporin A, and may have important implications for the therapy of human allograft rejection.
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Affiliation(s)
- M G Tovey
- UPR 9045, Centre National de la Recherche Scientifique-IFC1, Villejuif, France
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Fabiani P, Benizri E, Iovine L, Migliori G, Gugenheim J, Amiel J, Toubol J, Mouiel J. [Surgical treatment of gangrene of the perineum]. Presse Med 1994; 23:1862-4. [PMID: 7899318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Acute perineal gangrene due to anaerobic Gram negative bacilli or streptococci rapidly leads to tissue necrosis and death in 50% of the cases despite progress in intensive care. Emergency treatment requires adapted antibiotics, hyperbaric oxygen therapy and repeated surgery. Factors of poor prognosis include age over 60 years, lomboabdominal or crural extension, septic shock, positive blood cultures and lack of fecal derivation. Surgery is performed under general anaesthesia since loco-regional anaesthesia is contraindicated during the septic phase. Repeated operations are needed to make large incisions, evacuate pus, search for foreign bodies and resect damaged tissue in order to expose all the infected areas to air and hyperbaric oxygen. A colostomy must be performed in order to avoid fistulization and contamination of the infected areas. An indwelling urine catheter is usually sufficient although a suprapubic catheter may be needed at the risk of further extension of the gangrene. Surgical treatment is associated with intensive care and hyperbaric oxygen therapy. Three effective antibiotics are recommended. Using this aggressive surgical protocol, we have been able to reduce mortality to 20% in patients under 60 years of age.
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Affiliation(s)
- P Fabiani
- Service de Chirurgie digestive, Université de Nice-Sophia Antipolis, Hôpital Saint-Roch
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Affiliation(s)
- E Benizri
- Department of Urology, Hôpital Necker, Paris, France
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Abstract
Extracorporeal lithotripsy does not always provide satisfactory results for the treatment of ureteral stones. Such cases appear to be excellent indications for endocorporeal lithotripsy based on an association of ureteroscopy and laser. To compare the performances of 2 pulsed lasers, the pulsed dye laser (Candela) and solid Q switched laser (HMT), for the treatment of these calculi 161 ureteral stones were treated successively from November 1990 to March 1992 by a combination of ureteroscopy and laser. Endocorporeal lithotripsy was performed in 102 cases with the Candela laser, in 47 with the HMT laser and in 7 with both lasers. With a stable success rate greater than 90%, both lasers demonstrated equivalent performances regardless of the location of the stone along the ureter. However, while stone fragmentation was more rapid with the Candela laser, the HMT laser appeared to be more effective for dark stones (monohydrate calcium oxidate).
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Affiliation(s)
- E Benizri
- Service d'Urologie, Hôpital Pasteur, Nice, France
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Fabiani P, Bongain A, Persch M, Benizri E, Mouiel J, Gillet JY. [Endoscopic surgery during pregnancy. A case report of cholecystectomy]. J Gynecol Obstet Biol Reprod (Paris) 1993; 22:317-319. [PMID: 8345156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Pregnancy used to be considered a contraindication for endoscopic surgery of the digestive tract. We report a case of cholecystectomy carried out laparoscopically for complicated gall stones in a woman who was 14 weeks pregnant. There was no post-operative maternal or fetal morbidity. The mother carried on the pregnancy to term normally and gave birth to a normal infant. The same results have been reported in the literature for three other cases of cholecystectomy and six of appendicectomy. The sole technical precautions that had to be undertaken were in introducing and placing the trocars, taking into account the size of the uterus. There has been no scientific proof that CO2 is toxic for the fetus. Clinical practice shows that endoscopic surgery is possible without any obstetrical risk including thrombo-emboli, nor specific sepsis occurring in any of the three trimesters of pregnancy. The advantages of the endoscopic approach are that there is less post-operative pain and therefore less need to take analgesics. There are no complications because of an abdominal wound and the patient can both feed and walk about immediately after the operation with a reduction of the time spent in hospital. There is probably less risk of aborting when compared with classical laparotomy. The endoscopic route can be chosen when surgery is needed in the digestive tract during pregnancy.
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Affiliation(s)
- P Fabiani
- Service de Chirurgie Digestive, Hôpital St-Roch, Nice
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Abstract
Over a 5-year period (November 1984-November 1989), we treated 356 patients with ureteric calculi; 170 were treated by extracorporeal shock wave lithotripsy (ESWL) on a Dornier HM-3 lithotriptor. The calculi (n = 176) were uniformly distributed along the length of the ureter: 44 were just below the pelviureteric junction, 59 were lumbo-iliac, 42 were in the upper bony pelvis and 32 in the lower bony pelvis. The mean diameter of the upper ureteric calculi was 10 mm and for the others it was 8 mm. Thirty-four patients with acute obstructive pyelonephritis required pre-ESWL drainage of the urine. X-ray localisation required intravenous urography during lithotripsy in 52 cases (30%). On plain X-ray the following day 170 stones (96%) were judged to have disintegrated. The 6 patients whose stones were not fragmented received further treatment (ureterotomy (4) and ureteroscopy (2)). Five patients required additional treatment because of pain or fever (catheterisation (3) and ureterotomy (2)) and 2 patients had a second lithotripsy owing to insufficient fragmentation. Four patients were lost to follow-up. In 153 patients (90%) the fragments were eliminated completely, 146 in the first month and the remainder before the sixth month. No serious sequelae were observed. In addition to the 5 patients who required supplementary treatment. 11 patients with pain or fever needed medical treatment. We recommend first intention in situ ESWL for all ureteric calculi.
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Affiliation(s)
- E Benizri
- Department of Urology, Hôpital Necker, Paris, France
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Benizri E, Fabiani P, Migliori G, Quintens H, Chevallier D, Amiel J, Toubol J. [Perineal gangrene. Analysis of 24 cases]. Prog Urol 1992; 2:882-91. [PMID: 1302116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Fournier's syndrome, characterised by anaerobic necrotising cellulitis of the soft tissues situated below the diaphragm, is a serous disease with an unpredictable course. From 1978 to 1991, we treated 24 men with a mean age of 57 years (27 to 90 years). Following the diagnosis of this disease, rigorous treatment was instituted immediately, consisting of a triple antibiotic combination, repeated surgical exposure, debridement and drainage with a frequent, almost systematic indication for faecal diversion (n = 16), hyperbaric oxygen therapy and classical intensive care measures. The mean interval between the first clinical signs and the diagnosis was 7.4 days. The lesions were limited to the perineum in 11 cases and extended to the abdomen, thighs and/or loins in 13 cases. The microorganisms responsible for the infection were identified in 19 cases and blood cultures were positive in 5 cases. This infection was of coloproctological origin in 12 cases, urogenital origin in 4 cases and postoperative in 2 cases, while no aetiology could be identified in 6 patients. There were 6 deaths and 18 cures without sequelae. 1. The prognosis of this disease is better in younger subjects (under the age of 60 years) with a localised clinical form, with no deterioration in the general status, sterile blood cultures and treated by a diversion colostomy. 2. A detailed aetiological work-up must be performed, looking for local or regional infection, cancer, haematological malignancy or arterial disease.
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Affiliation(s)
- E Benizri
- Service d'Urologie du Professeur Toubol, Hôpital Pasteur, Nice
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Benizri E, Chevallier D, Quintens H, Fabiani P, Degraeve B, Amiel J, Raymond G, Toubol J. [Endoscopic internal urethrotomy. Retrospective studies of 132 cases]. Prog Urol 1992; 2:623-7. [PMID: 1302102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The authors report a series of 132 patients with urethral stricture all treated by the same surgical technique between 1979 and 1984: direct vision internal urethrotomy. 62% of good results were obtained after a single operation with a follow-up ranging between 18 months and 5 years. There was no mortality and the morbidity was considered to be 5%. The authors indicate that the results were more favourable when the operation was performed in a solitary, short (less than 2 cm) non-infected stricture of the proximal urethra. The duration of postoperative catheterization was 10 days; catheterization for a longer period did not provide any significant advantage. The poor results (38%) were reported in cases of extensive strictures situated in the distal urethra or in patients with a history of urethral surgery. These cases were treated by repeated internal urethrotomy; 32% were cured after a second urethrotomy, while the others required maintenance sessions of urethral dilatation or even a urethroplasty procedure.
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Affiliation(s)
- E Benizri
- Service d'Urologie du Professeur J. Toubol, Hôpital Pasteur, Nice
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Affiliation(s)
- N Katkhouda
- Department of Digestive Surgery, Saint Roch Hospital, Nice, France
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Benizri E, Vassault A, Nataf J, Wilmart JF, Hennequin C, Bailly M, Cukier J. [Prostatic specific antigen (PSA). Interpretation of results as a function of the assay method]. Prog Urol 1991; 1:413-8. [PMID: 1726942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The authors compare the two PSA assay methods most widely used in France. The first method (RIA Baxter) uses an isotope marker (Iodine 125), the other (EIA Biotrol) uses an enzymatic marker (alkaline phosphatase). PSA was assayed by means of these two techniques in 2 groups of patients: one group of 49 men considered to be free of any prostatic disease, recruited from blood donors; another group of 87 male patients in whom a PSA assay was performed prospectively at the first urology outpatients visit. The two PSA assay techniques gave different results, but the values obtained by these two methods were not discordant. It is therefore possible to define a coefficient of proportionality of 1.47 regardless of the PSA concentration or the urological disease considered (EIA Biotrol x 1.47 = RIA Baxter).
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Affiliation(s)
- E Benizri
- Clinique Urologique, Hôpital Necker, Paris
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