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Kandemir S, Dezoteux F, Loiez C, Hubiche T, Laurent S, Darras S. Diffuse skin findings secondary to lymph node tularemia in a patient with chronic rheumatoid arthritis on methotrexate. Dermatol Online J 2023; 29. [PMID: 37591266 DOI: 10.5070/d329361426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 06/23/2023] [Indexed: 08/19/2023] Open
Abstract
Tularemia has many atypical presentations which can represent a diagnostic challenge. The history is essential in the investigation of this disease. Bite-induced primary skin lesions should be distinguished from the infrequent immune-mediated secondary skin lesions. Herein, we present an atypical pseudovesicular rash secondary to Francisella tularensis.
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Affiliation(s)
- S Kandemir
- Department of Dermatology, Hopital Duchenne, Boulogne-sur-Mer, France.
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Anselm V, Meisinger T, Laurent S, Sautier L, Poetz O. P11-03 GLDH and OPN as potential translational biomarkers for DILI diagnosis. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.453] [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: 10/14/2022]
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Stanicki D, Vangijzegem T, Ternad I, Laurent S. An update on the applications and characteristics of magnetic iron oxide nanoparticles for drug delivery. Expert Opin Drug Deliv 2022; 19:321-335. [PMID: 35202551 DOI: 10.1080/17425247.2022.2047020] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION In the field of drug delivery, controlling the release of therapeutic substances at localized targets has become a primary focus of medical research, especially in the field of cancer treatment. Magnetic nanoparticles are one of the most promising drug carriers thanks to their biocompatibility and (super)paramagnetic properties. These properties allow for the combination between imaging modalities and specific release of drugs at target sites using either local stimulus (i.e. pH, conjugation of biomarkers, …) or external stimulus (i.e. external magnetic field). AREAS COVERED This review provides an update on recent advances with the development of targeted drug delivery systems based on magnetic nanoparticles (MNPs). This overview focuses on active targeting strategies and systems combining both imaging and therapeutic modalities (i.e. theranostics). If most of the examples concern the particular case of cancer therapy, the possibility of using MNPs for other medical applications is also discussed. EXPERT OPINION The development of clinically relevant drug delivery systems based on magnetic nanoparticles is driven by advantages stemming from their remarkable properties (i.e. easy preparation, facile chemical functionalization, biocompatibility, low toxicity and superior magnetic responsiveness). This literature review shows that drug carriers based on magnetic nanoparticles can be efficiently used for the controlled release of drug at targeted locations mediated by various stimuli. Advances in the field should lead to the implementation of such systems into clinical trials, especially systems enabling drug tracking in the body.
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Affiliation(s)
- D Stanicki
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, Mons, Belgium
| | - T Vangijzegem
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, Mons, Belgium
| | - I Ternad
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, Mons, Belgium
| | - S Laurent
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, Mons, Belgium.,Center for Microscopy and Molecular Imaging (CMMI), Gosselies, Belgium
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Schweitzer F, Laurent S, Fink GR, Barnett MH, Hartung HP, Warnke C. Effects of disease-modifying therapy on peripheral leukocytes in patients with multiple sclerosis. J Neurol 2021; 268:2379-2389. [PMID: 32036423 PMCID: PMC8217029 DOI: 10.1007/s00415-019-09690-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 12/24/2019] [Indexed: 12/11/2022]
Abstract
Modern disease-modifying therapies (DMTs) in multiple sclerosis (MS) have variable modes of action and selectively suppress or modulate the immune system. In this review, we summarize the predicted and intended as well as unwanted adverse effects on leukocytes in peripheral blood as a result of treatment with DMTs for MS. We link changes in laboratory tests to the possible therapeutic risks that include secondary autoimmunity, infections, and impaired response to vaccinations. Profound knowledge of the intended effects on leukocyte counts, in particular lymphocytes, explained by the mode of action, and adverse effects which may require additional laboratory and clinical vigilance or even drug discontinuation, is needed when prescribing DMTs to treat patients with MS.
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Affiliation(s)
- F Schweitzer
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Straße 62, 50937, Cologne, Germany
| | - S Laurent
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Straße 62, 50937, Cologne, Germany
| | - G R Fink
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Straße 62, 50937, Cologne, Germany
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Center Jülich, Jülich, Germany
| | - Michael H Barnett
- Department of Neurology, Royal Prince Alfred Hospital, and Brain and Mind Centre, University of Sydney, Sydney, Australia
| | - H P Hartung
- Department of Neurology, Medical Faculty, and Center for Neurology and Neuropsychiatry, LVR Klinikum, Heinrich-Heine-University Düsseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.
| | - C Warnke
- Department of Neurology, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Straße 62, 50937, Cologne, Germany.
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Berkane K, Laurent S. Les opioïdes : de la douleur à l’addiction ? PSYCHO-ONCOLOGIE 2020. [DOI: 10.3166/pson-2020-0133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
La crise des opioïdes actuelle aux États-Unis et sa médiatisation soulèvent la question de l’utilisation adéquate de ces antalgiques dans notre pratique quotidienne. En quatre vignettes cliniques, nous évoquons le travail conjoint des équipes d’addictologie et d’algologie pour prendre en charge au mieux les patients sous opioïdes en oncologie. Nous présentons les meilleurs moyens de diagnostiquer, prévenir et prendre en charge les écueils de ces traitements : la dépendance aux opioïdes de prescription et le mésusage des opioïdes de prescription, voire l’addiction aux opioïdes. Une des clés de cette prise en charge est la multidisciplinarité, centrale dans la réunion de concertation pluridisciplinaire.
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Kandemir S, Dezoteux F, Benchoukroun S, Staumont-Salle D, Loiez C, Laurent S, Darras S. Tularémie cutanéo-ganglionnaire de l’immunodéprimé. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.435] [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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Saini P, Rudakou U, Yu E, Ruskey J, Asayesh F, Laurent S, Spiegelman D, Fahn S, Waters C, Monchi O, Dauvilliers Y, Dupré N, Greenbaum L, Hassin-Baer S, Espay A, Rouleau G, Alcalay R, Fon E, Gan-Or Z. Sequencing the entire exome of REM sleep behavior and progression to neurodegenerative diseases. Parkinsonism Relat Disord 2020. [DOI: 10.1016/j.parkreldis.2020.06.119] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Demols A, Borbath I, Van den Eynde M, Houbiers G, Peeters M, Marechal R, Delaunoit T, Goemine JC, Laurent S, Holbrechts S, Paesmans M, Van Laethem JL. Regorafenib after failure of gemcitabine and platinum-based chemotherapy for locally advanced/metastatic biliary tumors: REACHIN, a randomized, double-blind, phase II trial. Ann Oncol 2020; 31:1169-1177. [PMID: 32464280 DOI: 10.1016/j.annonc.2020.05.018] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [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: 04/06/2020] [Revised: 05/06/2020] [Accepted: 05/07/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND There is a high unmet clinical need for treatments of advanced/metastatic biliary tract cancers after progression on first-line chemotherapy. Regorafenib has demonstrated efficacy in some gastrointestinal tumors that progress on standard therapies. PATIENTS AND METHODS REACHIN was a multicenter, double-blind, placebo-controlled, randomized phase II study designed to evaluate the safety and efficacy of regorafenib in patients with nonresectable/metastatic biliary tract cancer that progressed after gemcitabine/platinum chemotherapy. Patients were randomly assigned 1 : 1 to best supportive care plus either regorafenib 160 mg once daily 3 weeks on/1 week off or placebo until progression or unacceptable toxicity. No crossover was allowed. The primary objective was progression-free survival (PFS). Secondary objectives were response rate, overall survival, and translational analysis. RESULTS Sixty-six patients with intrahepatic (n = 42), perihilar (n = 6), or extrahepatic (n = 9) cholangiocarcinoma, or gallbladder carcinoma (n = 9) were randomized, 33 to each treatment group (33 per group). At a median follow-up of 24 months, all patients had progressed and six patients were alive. Median treatment duration was 11.0 weeks [95% confidence interval (CI): 6.0-15.9] in the regorafenib group and 6.3 weeks (95% CI: 3.9-7.0) in the placebo group (P = 0.002). Fourteen of 33 patients (42%) in the regorafenib group had a dose reduction. Stable disease rates were 74% (95% CI: 59-90) in the regorafenib group and 34% with placebo (95% CI: 18-51; P = 0.002). Median PFS in the regorafenib group was 3.0 months (95% CI: 2.3-4.9) and 1.5 months (95% CI: 1.2-2.0) in the placebo group (hazard ratio 0.49; 95% CI: 0.29-0.81; P = 0.004) and median overall survival was 5.3 months (95% CI: 2.7-10.5) and 5.1 months (95% CI: 3.0-6.4), respectively (P = 0.28). There were no unexpected/new safety signals. CONCLUSION Regorafenib significantly improved PFS and tumor control in patients with previously treated metastatic/unresectable biliary tract cancer in the second- or third-line setting. CLINICAL TRIAL REGISTRATION The trial is registered in the European Clinical Trials Register database (EudraCT 2012-005626-30) and at ClinicalTrials.gov (NCT02162914).
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Affiliation(s)
- A Demols
- GE and Digestive Oncology Department, CUB Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium.
| | - I Borbath
- GE Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - M Van den Eynde
- GE Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - G Houbiers
- Oncology Department, Saint-Joseph Community Health Center, Liège, Belgium
| | - M Peeters
- Oncology Department - University Hospital Antwerp, Edegem, Belgium
| | - R Marechal
- GE and Digestive Oncology Department, CUB Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - T Delaunoit
- GE Department, INDC Entité Jolimontoise, Haine-St-Paul, Belgium
| | - J-C Goemine
- Oncology Department, Cliniques et Maternité Ste Elisabeth, Namur, Belgium
| | - S Laurent
- GE Department - Ghent University Hospital, Ghent, Belgium
| | - S Holbrechts
- Oncology Department, Centre Hospitalier Universitaire A. Paré, Mons, Belgium
| | - M Paesmans
- Data Center, Institut J. Bordet, Brussels, Belgium
| | - J-L Van Laethem
- GE and Digestive Oncology Department, CUB Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
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Lenkey Z, Illyes M, Kahan T, Boutouyrie P, Laurent S, Molnar FT, Schillaci GA, Viigimaa M, Cziraki A. P1539Aortic pulse wave velocity measured by an oscillometric device independently predicts all-cause mortality in a cohort of 4146 subjects. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objectives
Assessment of carotid-femoral pulse wave velocity by applanation tonometry independently predicts all-cause and cardiovascular mortality. However, there has been a need for a simpler, user-independent measurement with a validated device, that is applicable even in the primary care setting.
Methods and subjects
4146 subjects (49% men) aged 35–75 years were measured in multiple centers in Hungary. Subjects visited the outpatient department of these centers on their own initiative. The measurement of aortic pulse wave velocity (PWVao) with Arteriograph was performed in addition to taking past medical history, physical examination and laboratory tests. The mean follow-up time of the study was 5.5 years. The number of events (all cause mortality) were provided by the Hungarian National Health Insurance Fund. Cox regression analyses were used to identify predictive factors for this endpoint.
Results
The mean age of the study population was 53 years, brachial systolic and diastolic blood pressure were 137±20 and 82±11 mmHg, and heart rate was 70±10 1/min. The mean value of SCORE was 3 in this large cohort. 410 subjects had a registered cerebro-or cardiovascular event before the measurement, the number of smokers was 656 (16%), 1974 subjects were treated with at least one anti-hypertensive drug (48%), while the number of subjects on lipid-lowering, antidiabetic or antiplatelet medication were 807 (19%), 352 (8%) and 398 (17%), respectively. There were 116 fatal events during a mean follow-up of 5.5 years. According to the Cox regression, PWVao is a significant and independent predictor of all cause-mortality and in univariate analysis, a 1.0 m/s increase in PWVao was associated with HR 1.7 [1.47–1.98; p<0.001], for this endpoint.
Conclusion
Aortic pulse wave velocity measured by an invasively validated, simple, oscillometric device predicted all-cause mortality in a large cohort of relatively young subjects of the general population that may improve risk stratification even in the everyday clinical practice or primary care setting.
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Affiliation(s)
- Z Lenkey
- University of Pecs, Medical School, Heart Institute, Pecs, Hungary
| | - M Illyes
- University of Pecs, Medical School, Heart Institute, Pecs, Hungary
| | - T Kahan
- Karolinska Institute, Department of Clinical Sciences, Stockholm, Sweden
| | - P Boutouyrie
- European Hospital Georges Pompidou, Pharmacology Department and INSERM U 970, Paris, France
| | - S Laurent
- European Hospital Georges Pompidou, Pharmacology Department and INSERM U 970, Paris, France
| | - F T Molnar
- Budapest University of Technology and Economics, Department of Hydrodynamic Systems, Budapest, Hungary
| | - G A Schillaci
- University of Perugia, Department of Internal Medicine, Perugia, Italy
| | - M Viigimaa
- Tallinn University of Technology, Technomedicum, Tallinn, Estonia
| | - A Cziraki
- University of Pecs, Medical School, Heart Institute, Pecs, Hungary
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Bruno RM, Nilsson P, Engstrom G, Wadstrom B, Empana JP, Boutouyrie P, Laurent S. P1553Differential association between vascular and chronological age with cardiovascular outcomes. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background/Introduction
Increased pulse wave velocity (PWV), is a reliable marker of early vascular aging (EVA). However, the identification of individuals whose arteries are abnormally healthy in comparison to their age and cardiovascular (CV) risk profile might be of interest, to discover novel pathways of cardioprotection and provide preventive strategies for successful vascular aging.
Purpose
1) to provide a novel calculation for vascular age and examine his determinants; 2) to test the hypothesis that individuals with the largest difference between chronological and vascular age (C-V age) show a lower rate of CV events than their counterparts, and may thus be defined as the supernormal vascular aging group (SUPERNOVA).
Methods
Vascular age was defined as predicted age based on classical CV risk factors and PWV. The best fitting model for vascular age was investigated in the multicenter, European, cross-sectional Reference Values for Arterial stiffness Collaboration Database (n=11406). Continuous variables were modelled as smoothing splines. Thereafter, the risk of fatal and non-fatal CV events associated with C-V age was examined in the longitudinal cohort of the Malmo Diet and Cancer Study (n=2663) using Cox proprotional hazard regression models. C-V age was examined as a continuous variable (natural splines) and as a 3 levels categorical variables based on the best grouping of the deciles of C-V age and corresponding to the EVA (<3.0 years), normal vascular aging (3.0 to 8.8 years) and SUPERNOVA (>8.8 years) respectively.
Results
In the Reference Values Cohort (age range 17–85 years, 52.4% men, 38.1% hypertensives, 3.9% diabetics, average PWV 7.8 m/s), the most significant predictor of vascular age (full model r2 0.598) was PWV. In the Malmo Diet and Cancer Study Cohort (age 61–89 years, 63.6% men, 64.0% hypertensives, 12.9% diabetics, PWV 11.5 m/s), during follow-up (6.6 years on average), 286 individuals developed a first cardiovascular event. In the Cox survival analysis, C-V age was significantly and inversely associated with CV events. Compare to normal vascular aging, participants with SUPERNOVA had lower risk for CV events [HR 0.51 (0.34–0.76)] whereas those with EVA had a higher risk [HR 2.71 (1.80–4.09)]. Instead, there was no significant association with all-cause mortality.
Conclusions
The use of PWV and CV risk factors may be useful to define early and supernormal vascular aging in particular, and to assess its clinical relevance towards the risk of cardiovascular disease and death.
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Affiliation(s)
| | | | | | | | - J P Empana
- Paris Cardiovascular Research Center (PARCC), Paris, France
| | - P Boutouyrie
- Paris Cardiovascular Research Center (PARCC), Paris, France
| | - S Laurent
- Paris Cardiovascular Research Center (PARCC), Paris, France
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Cotin G, Blanco-Andujar C, Nguyen DV, Affolter C, Boutry S, Boos A, Ronot P, Uring-Lambert B, Choquet P, Zorn PE, Mertz D, Laurent S, Muller RN, Meyer F, Felder Flesch D, Begin-Colin S. Dendron based antifouling, MRI and magnetic hyperthermia properties of different shaped iron oxide nanoparticles. Nanotechnology 2019; 30:374002. [PMID: 31195384 DOI: 10.1088/1361-6528/ab2998] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Owing to the great potential of iron oxide nanoparticles (NPs) for nanomedicine, large efforts have been made to better control their magnetic properties, especially their magnetic anisotropy to provide NPs able to combine imaging by MRI and therapy by magnetic hyperthermia. In that context, the design of anisotropic NPs appears as a very promising and efficient strategy. Furthermore, their bioactive coating also remains a challenge as it should provide colloidal stability, biocompatibility, furtivity along with good water diffusion for MRI. By taking advantage of our controlled synthesis method of iron oxide NPs with different shapes (cubic, spherical, octopod and nanoplate), we demonstrate here that the dendron coating, shown previously to be very suitable for 10 nm sized iron oxide, also provided very good colloidal, MRI and antifouling properties to the anisotropic shaped NPs. These antifouling properties, demonstrated through several experiments and characterizations, are very promising to achieve specific targeting of disease tissues without affecting healthy organs. On the other hand, the magnetic hyperthermia properties were shown to depend on the saturation magnetization and the ability of NPs to self-align, confirming the need of a balance between crystalline and dipolar magnetic anisotropies.
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Affiliation(s)
- G Cotin
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67034 Strasbourg, France. Labex CSC, Fondation IcFRC/université de Strasbourg, 8 allée Gaspard Monge BP 70028, F-67083 Strasbourg Cedex, France
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Demols A, Borbath I, Van den Eynde M, Houbiers G, Peeters M, Marechal R, Delaunoit T, Goeminne J, Laurent S, Holbrechts S, Paesmans M, Van Laethem J. Exploratory analysis based on tumor location of REACHIN, a randomized, double-blinded, placebo-controlled phase 2 trial of regorafenib after failure of gemcitabine and platinum-based chemotherapy for advanced/metastatic biliary tract tumors. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz154.002] [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: 11/13/2022] Open
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Laurent S, Verhelst X, Geerts A, Geboes K, De Man M, Troisi R, Vanlander A, Rogiers X, Berrevoet F, Van Vlierberghe H. Update on liver transplantation for cholangiocarcinoma : a review of the recent literature. Acta Gastroenterol Belg 2019; 82:417-420. [PMID: 31566330] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cholangiocarcinoma (CC) represent 3% of all gastrointestinal tumours and can be classified anatomically in 3 types: intrahepatic (ICC), perihilar (PCC) and distal (DCC) cholangiocarcinomas. Resection is the treatment of choice but is only achieved in a few cases (<20%) because of invasion of the biliary tract and/or vascular structures. The outcome of advanced CC is poor with an overall survival (OS) of maximum 15 months with chemotherapy. In the 1990s, CC was regarded as a contraindication for liver transplantation (LT). LT has recently been proposed as potentially curative option for ICC and PCC. Careful patient selection has changed OS. This article provides an update on current status of LT for patients with unresectable CC.
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Affiliation(s)
- S Laurent
- Digestive Oncology, Ghent University Hospital Ghent, Belgium
| | - X Verhelst
- Hepatology, Ghent University Hospital Ghent, Belgium
| | - A Geerts
- Hepatology, Ghent University Hospital Ghent, Belgium
| | - K Geboes
- Digestive Oncology, Ghent University Hospital Ghent, Belgium
| | - M De Man
- Digestive Oncology, Ghent University Hospital Ghent, Belgium
| | - R Troisi
- Hepatobiliary Surgery, Ghent University Hospital Ghent, Belgium
| | - A Vanlander
- Hepatobiliary Surgery, Ghent University Hospital Ghent, Belgium
| | - X Rogiers
- Hepatobiliary Surgery, Ghent University Hospital Ghent, Belgium
| | - F Berrevoet
- Hepatobiliary Surgery, Ghent University Hospital Ghent, Belgium
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Diallo MST, Traore MS, Balde MA, Camara AK, Baldé ES, Traore S, Oulare K, Diallo TS, Laurent S, Muller RN, Tuenter E, Pieters L, Balde AM. Prevalence, management and ethnobotanical investigation of hypertension in two Guinean urban districts. J Ethnopharmacol 2019; 231:73-79. [PMID: 30056206 DOI: 10.1016/j.jep.2018.07.028] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 07/04/2018] [Accepted: 07/25/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Hypertension is an important public health challenge in low- and middle-income countries, and in many African countries including Guinea medicinal plants are still widely used for its treatment. MATERIALS AND METHODS The objective of this study was to determine the prevalence of hypertension in two Guinean urban districts (Pounthioun and Dowsare), to describe its management and to collect information on traditional herbal remedies. A total of 316 participants entered the study, 28.2% (89/316) men and 71.8% (227/316) women. Of these, 181 were from Dowsare (50 men and 131 women) and 135 from Pounthioun (39 men and 96 women). The mean age of subjects was 40.8 ± 14.0 years (range18 - 88years), while the majority of subjects (63.3% or 200/316) were 45-74 years old. RESULTS The overall prevalence of hypertension was 44.9% (142/316): 46.4% (84/181) from Dowsare and 43.0% (58/135) from Pounthioun. Ethnobotanical investigations among hypertensive patients led to the collection of 15 plant species, among which Hymenocardia acida leaves and Uapaca togoensis stem bark were the most cited. Phytochemical investigation of these two plant species led to the isolation and identification of isovitexin and isoorientin from H. acida, and betulinic acid and lupeol from U. togoensis. CONCLUSION The presence of these constituents in Hymenocardia acida leaves and Uapaca togoensis stem bark may at least in part support their traditional use against hypertension in Guinea.
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Affiliation(s)
- M S T Diallo
- Department of Pharmacy, University Gamal Abdel Nasser of Conakry, BP 1017, Guinea; Research and Valorization Center on Medicinal Plants Dubreka, BP 6411 Conakry, Guinea; Service de Chimie Générale, Organique et Biomédicale; Laboratoire de RMN et d'Imagerie Moléculaire, Université de Mons, Belgium
| | - M S Traore
- Department of Pharmacy, University Gamal Abdel Nasser of Conakry, BP 1017, Guinea; Research and Valorization Center on Medicinal Plants Dubreka, BP 6411 Conakry, Guinea
| | - M A Balde
- Department of Pharmacy, University Gamal Abdel Nasser of Conakry, BP 1017, Guinea; Research and Valorization Center on Medicinal Plants Dubreka, BP 6411 Conakry, Guinea
| | - A K Camara
- Department of Pharmacy, University Gamal Abdel Nasser of Conakry, BP 1017, Guinea
| | - E S Baldé
- Department of Pharmacy, University Gamal Abdel Nasser of Conakry, BP 1017, Guinea; Research and Valorization Center on Medicinal Plants Dubreka, BP 6411 Conakry, Guinea
| | - S Traore
- Research and Valorization Center on Medicinal Plants Dubreka, BP 6411 Conakry, Guinea
| | - K Oulare
- Research and Valorization Center on Medicinal Plants Dubreka, BP 6411 Conakry, Guinea
| | - T S Diallo
- Research and Valorization Center on Medicinal Plants Dubreka, BP 6411 Conakry, Guinea
| | - S Laurent
- Service de Chimie Générale, Organique et Biomédicale; Laboratoire de RMN et d'Imagerie Moléculaire, Université de Mons, Belgium
| | - R N Muller
- Service de Chimie Générale, Organique et Biomédicale; Laboratoire de RMN et d'Imagerie Moléculaire, Université de Mons, Belgium
| | - E Tuenter
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Belgium
| | - L Pieters
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Belgium
| | - A M Balde
- Department of Pharmacy, University Gamal Abdel Nasser of Conakry, BP 1017, Guinea; Research and Valorization Center on Medicinal Plants Dubreka, BP 6411 Conakry, Guinea.
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15
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Marabelle A, Eberst L, Terret C, Pilleul F, Mastier C, Bouhamama A, Gilles-Afchain L, Laurent S, Delzano I, Reynaud C, Caux C, Caux C, Garin G, Bidaux AS, Perol D, Stojkowitz N, Homerin M, Leenders H, Cassier P. A phase I dose escalation trial evaluating the impact of an in situ immunization strategy with intra-tumoral injections of Pexa-Vec in combination with ipilimumab in advanced solid tumors with injectable lesions. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy487.041] [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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16
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Chiritescu G, Dumon K, Verslype C, Houbiers G, Peeters M, Janssens J, van Daele D, Laurent S, Arts J, Hendrickx K, Borbath I, Ferrante M, Bastin F, Goeminne JC, van Laethem JL, Vanderstraeten E, Decaestecker J, van Vaerenbergh W, Delhougne B, Van Cutsem E. Final results of a phase II quality of life (QOL) randomized, cross-over (CO) study with gemcitabine (Gem) and nab-paclitaxel (n-P) in locally advanced or metastatic pancreatic ductal adenocarcinoma (PDAC): QOLINPAC. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy282.123] [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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17
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Piessevaux H, Demey W, Bols A, Janssens J, Polus M, Rezaei Kalantari H, Laurent S, Demols A, Humblet Y, Deboever G, Kargar Samani K, Ferrante M, Monsaert E, Rondou T, van Laethem JL, Tejpar S. Effect of oral magnesium supplementation on the kinetics of magnesium wasting induced by EGFR targeted antibody therapy for colorectal carcinoma (MAGNET trial). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy300.118] [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: 11/13/2022] Open
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18
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Kozakova M, Boutouyrie P, Morizzo C, Della Latta D, Jamagidze G, Chiappino D, Laurent S, Palombo C. P730Noninvasive assessment of local carotid pulse pressure by radiofrequency-based wall tracking: comparison with applanation tonometry and relationships with cardiovascular biomarkers. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M Kozakova
- University of Pisa, Department of Clinical and Experimental Medicine, Pisa, Italy
| | - P Boutouyrie
- Descartes University, Hôpital Européen Georges Pompidou, Department of Pharmacology and PARCC-INSERM U970, Paris, France
| | - C Morizzo
- University of Pisa, Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, Pisa, Italy
| | - D Della Latta
- Fondazione Toscana G. Monasterio, Imaging Department, Massa, Italy
| | - G Jamagidze
- Fondazione Toscana G. Monasterio, Imaging Department, Massa, Italy
| | - D Chiappino
- Fondazione Toscana G. Monasterio, Imaging Department, Massa, Italy
| | - S Laurent
- Descartes University, Hôpital Européen Georges Pompidou, Department of Pharmacology and PARCC-INSERM U970, Paris, France
| | - C Palombo
- University of Pisa, Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, Pisa, Italy
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19
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Climie R, Boutouyrie P, Chaussade E, Plichart M, Offredo L, Guibout C, Van Sloten TT, Thomas F, Pannier B, Sharman JE, Laurent S, Jouven X, Empana JP. P239Physical activity and neural baroreflex sensitivity: the Paris Prospective Study III. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- R Climie
- INSERM 970, Dept. of Epidemiology, Paris, France
| | - P Boutouyrie
- INSERM 970, Dept. of Pharmacology, Paris, France
| | | | - M Plichart
- University Paris-Descartes, Paris, France
| | - L Offredo
- INSERM 970, Dept. of Epidemiology, Paris, France
| | - C Guibout
- INSERM 970, Dept. of Epidemiology, Paris, France
| | | | - F Thomas
- Investigations Préventives et cliniques (IPC), Paris, France
| | - B Pannier
- Investigations Préventives et cliniques (IPC), Paris, France
| | - J E Sharman
- Menzies Research Institute, Hobart, Australia
| | - S Laurent
- University Paris-Descartes, Paris, France
| | - X Jouven
- INSERM 970, Dept. of Epidemiology, Paris, France
| | - J P Empana
- INSERM 970, Dept. of Epidemiology, Paris, France
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20
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Bruno RM, Di Lascio N, Guarino D, Vitali S, Rossi P, Caramella D, Taddei S, Faita F, Ghiadoni L, Adlam D, Persu A, Laurent S, Boutouyrie P. P1571Identification of radial vascular wall abnormalities by very-high frequency ultrasound in patients with spontaneous coronary artery dissection and fybromuscular dysplasia: the FUCHSIA study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - N Di Lascio
- Institute of Clinical Physiology of CNR, Pisa, Italy
| | | | | | - P Rossi
- University of Pisa, Pisa, Italy
| | | | | | - F Faita
- Institute of Clinical Physiology of CNR, Pisa, Italy
| | | | - D Adlam
- University of Leicester, Leicester, United Kingdom
| | - A Persu
- Universite Catholique de Louvain, Brussels, Belgium
| | - S Laurent
- Hôpital Européen Georges Pompidou, Université Paris Descartes, Paris, France
| | - P Boutouyrie
- Hôpital Européen Georges Pompidou, Université Paris Descartes, Paris, France
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21
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Vangijzegem T, Stanicki D, Boutry S, Paternoster Q, Vander Elst L, Muller RN, Laurent S. VSION as high field MRI T 1 contrast agent: evidence of their potential as positive contrast agent for magnetic resonance angiography. Nanotechnology 2018; 29:265103. [PMID: 29620535 DOI: 10.1088/1361-6528/aabbd0] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Because of their outstanding magnetic properties, iron oxide nanoparticles have already been the subject of numerous studies in the biomedical field, in particular as a negative contrast agent for T2-weighted nuclear magnetic resonance imaging, or as therapeutic agents in hyperthermia experiments. Recent studies have shown that below a given particle size (i.e. 5 nm), iron oxide may be used to provide a significant positive (brightening) effect on T1-weighted MRI. In such an application, not only the size of the crystal, but also the control of the coating process is essential to ensure optimal properties, especially at a very high field (> 3 T). In this work, we focused on the development of very small iron oxide nanoparticles as a potential platform for high field T1 magnetic resonance angiography (MRA) applications. The feasibility has been evaluated in vivo at 9.4 T, demonstrating the usefulness of the developed system for MRA applications.
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Affiliation(s)
- T Vangijzegem
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, B-7000 Mons, Belgium
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22
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Climie R, Boutouyrie P, Chaussade E, Plichart M, Offredo L, Guibout C, Thomas F, Pannier B, Laurent S, Jouven X, Empana J. PHYSICAL ACTIVITY ACROSS THE WHOLE-OF-DAY AND VASCULAR STRUCTURE AND FUNCTION. J Hypertens 2018. [DOI: 10.1097/01.hjh.0000539879.06455.d5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Chiritescu G, Dumon K, Verslype C, Prenen H, Houbiers G, Peeters M, Janssens J, Van Daele D, Laurent S, Arts J, Hendrickx K, Borbath I, Ferrante M, Bastin F, Goeminne J, Van Laethem J, Vanderstraeten E, Decaestecker J, Van Vaerenbergh W, Delhougne B, Van Cutsem E. Gemcitabine with nab-paclitaxel in patients with locally advanced or metastatic pancreatic ductal adenocarcinoma (PDAC): A quality of life randomized cross-over study (QOLINPAC). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy149.002] [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: 11/14/2022] Open
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24
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Ghouila Z, Laurent S, Henoumont C, Vander Elst L, Muller R, Baaliouamer A. Rich extract on total polyphenols and antioxidant activity obtained by conventional and non-conventional methods from Ahmeur Bouamer grape seed. J Fundam and Appl Sci 2018. [DOI: 10.4314/jfas.v8i3.3] [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: 11/17/2022] Open
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25
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Bordeianu C, Parat A, Piant S, Walter A, Zbaraszczuk-Affolter C, Meyer F, Begin-Colin S, Boutry S, Muller RN, Jouberton E, Chezal JM, Labeille B, Cinotti E, Perrot JL, Miot-Noirault E, Laurent S, Felder-Flesch D. Evaluation of the Active Targeting of Melanin Granules after Intravenous Injection of Dendronized Nanoparticles. Mol Pharm 2018; 15:536-547. [PMID: 29298480 DOI: 10.1021/acs.molpharmaceut.7b00904] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The biodistribution of dendronized iron oxides, NPs10@D1_DOTAGA and melanin-targeting NPs10@D1_ICF_DOTAGA, was studied in vivo using magnetic resonance imaging (MRI) and planar scintigraphy through [177Lu]Lu-radiolabeling. MRI experiments showed high contrast power of both dendronized nanoparticles (DPs) and hepatobiliary and urinary excretions. Little tumor uptake could be highlighted after intravenous injection probably as a consequence of the negatively charged DOTAGA-derivatized shell, which reduces the diffusion across the cells' membrane. Planar scintigraphy images demonstrated a moderate specific tumor uptake of melanoma-targeted [177Lu]Lu-NPs10@D1_ICF_DOTAGA at 2 h post-intravenous injection (pi), and the highest tumor uptake of the control probe [177Lu]Lu-NPs10@D1_DOTAGA at 30 min pi, probably due to the enhanced permeability and retention effect. In addition, ex vivo confocal microscopy studies showed a high specific targeting of human melanoma samples impregnated with NPs10@D1_ICF_Alexa647_ DOTAGA.
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Affiliation(s)
- C Bordeianu
- Université de Strasbourg , CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.,Fondation IcFRC/Université de Strasbourg , 8 allée Gaspard Monge BP 70028, F-67083 Strasbourg Cedex, France
| | - A Parat
- Université de Strasbourg , CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.,Fondation IcFRC/Université de Strasbourg , 8 allée Gaspard Monge BP 70028, F-67083 Strasbourg Cedex, France
| | - S Piant
- Université de Strasbourg , CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.,Fondation IcFRC/Université de Strasbourg , 8 allée Gaspard Monge BP 70028, F-67083 Strasbourg Cedex, France
| | - A Walter
- Université de Strasbourg , CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.,Fondation IcFRC/Université de Strasbourg , 8 allée Gaspard Monge BP 70028, F-67083 Strasbourg Cedex, France
| | - C Zbaraszczuk-Affolter
- Université de Strasbourg , INSERM, UMR 1121 Biomatériaux et Bioingénierie, 11 rue Humann F-67000 Strasbourg, France
| | - F Meyer
- Université de Strasbourg , INSERM, UMR 1121 Biomatériaux et Bioingénierie, 11 rue Humann F-67000 Strasbourg, France
| | - S Begin-Colin
- Université de Strasbourg , CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.,Fondation IcFRC/Université de Strasbourg , 8 allée Gaspard Monge BP 70028, F-67083 Strasbourg Cedex, France
| | - S Boutry
- University of Mons , General, Organic and Biomedical Chemistry NMR and Molecular Imaging Laboratory, Avenue Maistriau 19, 7000 Mons, Belgium.,CMMI - Center for Microscopy and Molecular Imaging, MRI & Optical Imaging , Rue Adrienne Bolland 8, 6041 Gosselies, Belgium
| | - R N Muller
- University of Mons , General, Organic and Biomedical Chemistry NMR and Molecular Imaging Laboratory, Avenue Maistriau 19, 7000 Mons, Belgium.,CMMI - Center for Microscopy and Molecular Imaging, MRI & Optical Imaging , Rue Adrienne Bolland 8, 6041 Gosselies, Belgium
| | - E Jouberton
- Clermont Université, Université d'Auvergne , Laboratoire d'Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, F-63000 Clermont-Ferrand, France.,INSERM, U1240 , F-63005 Clermont-Ferrand, France
| | - J-M Chezal
- Clermont Université, Université d'Auvergne , Laboratoire d'Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, F-63000 Clermont-Ferrand, France.,INSERM, U1240 , F-63005 Clermont-Ferrand, France
| | - B Labeille
- CHU , Département de Dermatologie, F-42000 St. Etienne, France
| | - E Cinotti
- Department of Medical, Surgical and Neurological Science, Dermatology Section, University of Siena , S. Maria alle Scotte Hospital, F-53100 Siena, Italy
| | - J-L Perrot
- CHU , Département de Dermatologie, F-42000 St. Etienne, France
| | - E Miot-Noirault
- Clermont Université, Université d'Auvergne , Laboratoire d'Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, F-63000 Clermont-Ferrand, France.,INSERM, U1240 , F-63005 Clermont-Ferrand, France
| | - S Laurent
- University of Mons , General, Organic and Biomedical Chemistry NMR and Molecular Imaging Laboratory, Avenue Maistriau 19, 7000 Mons, Belgium.,CMMI - Center for Microscopy and Molecular Imaging, MRI & Optical Imaging , Rue Adrienne Bolland 8, 6041 Gosselies, Belgium
| | - D Felder-Flesch
- Université de Strasbourg , CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France.,Fondation IcFRC/Université de Strasbourg , 8 allée Gaspard Monge BP 70028, F-67083 Strasbourg Cedex, France
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26
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Moins S, Henoumont C, De Winter J, Khalil A, Laurent S, Cammas-Marion S, Coulembier O. Reinvestigation of the mechanism of polymerization of β-butyrolactone from 1,5,7-triazabicyclo[4.4.0]dec-5-ene. Polym Chem 2018. [DOI: 10.1039/c8py00206a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The questionable mechanism initially proposed to explain how 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) allows us to ring-open β-lactones, such as β-butyrolactone (BL), is reinvestigated here.
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Affiliation(s)
- S. Moins
- Laboratory of Polymeric and Composite Materials
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- University of Mons
- 7000 Mons
- Belgium
| | - C. Henoumont
- General
- Organic and Biomedical Chemistry
- NMR and Molecular Imaging Laboratory
- University of Mons
- 7000 Mons
| | - J. De Winter
- Organic Synthesis and Mass Spectrometry Laboratory (S2MOS)
- University of Mons
- 7000 Mons
- Belgium
| | - A. Khalil
- Laboratory of Polymeric and Composite Materials
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- University of Mons
- 7000 Mons
- Belgium
| | - S. Laurent
- General
- Organic and Biomedical Chemistry
- NMR and Molecular Imaging Laboratory
- University of Mons
- 7000 Mons
| | - S. Cammas-Marion
- Univ Rennes
- ENSCR
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- 35000 Rennes
| | - O. Coulembier
- Laboratory of Polymeric and Composite Materials
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- University of Mons
- 7000 Mons
- Belgium
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27
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Gasecki D, Kwarciany M, Kowalczyk K, Nowicki T, Rojek A, Szurowska E, Botouyrie P, Laurent S, Karaszewski B, Narkiewicz K. [PP.29.26] AORTIC STIFFNESS IS INDEPENDENTLY RELATED TO INTRACRANIAL ATHEROSCLEROSIS IN PATIENTS WITH ISCHEMIC STROKE. J Hypertens 2017. [DOI: 10.1097/01.hjh.0000523975.13188.ee] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Obeid H, Khettab H, Hallab M, Feuilloy M, Boutouyrie P, Laurent S. [PP.09.31] CALCULATION OF CENTRAL BLOOD PRESSURE BY ANALYZING THE CONTOUR OF THE PHOTOPLETHYSMOGRAPHIC PULSE MEASURED AT THE FINGER WITH THE POPMÈTRE® DEVICE. J Hypertens 2017. [DOI: 10.1097/01.hjh.0000523426.43287.68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Hering D, Nowak R, Czechowicz K, Kucharska W, Boutouyrie P, Laurent S, Narkiewicz K. [LB.03.03] SYMPATHETIC NERVE ACTIVITY IS INDEPENDENTLY LINKED TO GEOMETRIC AND ELASTIC PROPERTIES OF COMMON CAROTID ARTERY IN RESISTANT HYPERTENSION. J Hypertens 2017. [DOI: 10.1097/01.hjh.0000523174.13986.e4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Rigaux G, Gheran CV, Callewaert M, Cadiou C, Voicu SN, Dinischiotu A, Andry MC, Vander Elst L, Laurent S, Muller RN, Berquand A, Molinari M, Huclier-Markai S, Chuburu F. Characterization of Gd loaded chitosan-TPP nanohydrogels by a multi-technique approach combining dynamic light scattering (DLS), asymetrical flow-field-flow-fractionation (AF4) and atomic force microscopy (AFM) and design of positive contrast agents for molecular resonance imaging (MRI). Nanotechnology 2017; 28:055705. [PMID: 28029111 DOI: 10.1088/1361-6528/aa5188] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Chitosan CS-tripolyphosphate TPP/hyaluronic acid HA nanohydrogels loaded with gadolinium chelates (GdDOTA ⊂ CS-TPP/HA NGs) synthesized by ionic gelation were designed for lymph node (LN) MRI. In order to be efficiently drained to LNs, nanogels (NGs) needed to exhibit a diameter ϕ < 100 nm. For that, formulation parameters were tuned, using (i) CS of two different molecular weights (51 and 37 kDa) and (ii) variable CS/TPP ratio (2 < CS/TPP < 8). Characterization of NG size distribution by dynamic light scattering (DLS) and asymetrical flow-field-flow-fractionation (AF4) showed discrepancies since DLS diameters were consistently above 200 nm while AF4 showed individual nano-objects with ϕ < 100 nm. Such a difference could be correlated to the presence of aggregates inherent to ionic gelation. This point was clarified by atomic force microscopy (AFM) in liquid mode which highlighted the main presence of individual nano-objects in nanosuspensions. Thus, combination of DLS, AF4 and AFM provided a more precise characterization of GdDOTA ⊂ CS-TPP/HA nanohydrogels which, in turn, allowed to select formulations leading to NGs of suitable mean sizes showing good MRI efficiency and negligible toxicity.
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Affiliation(s)
- G Rigaux
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne URCA, F-51685 Reims Cedex 2, France
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31
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Ghouila Z, Laurent S, Boutry S, Vander Elst L, Nateche F, Muller RN, Baaliouamer A. Antioxidant, antibacterial and cell toxicity effects of polyphenols Fromahmeur bouamer grape seed extracts. J Fundam and Appl Sci 2017. [DOI: 10.4314/jfas.v9i1.24] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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32
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Bordeianu C, Parat A, Affolter-Zbaraszczuk C, Muller RN, Boutry S, Begin-Colin S, Meyer F, Laurent S, Felder-Flesch D. How a grafting anchor tailors the cellular uptake and in vivo fate of dendronized iron oxide nanoparticles. J Mater Chem B 2017; 5:5152-5164. [DOI: 10.1039/c7tb00781g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Superparamagnetic iron oxide nanoparticles synthesized by thermal decomposition have been grafted with two dendrons bearing respectively a monophosphonic anchor (D2) or a biphosphonic tweezer (D2-2P) at their focal point.
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Affiliation(s)
- C. Bordeianu
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg
- F-67000 Strasbourg
- France
| | - A. Parat
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg
- F-67000 Strasbourg
- France
| | | | - R. N. Muller
- University of Mons
- General
- Organic and Biomedical Chemistry NMR and Molecular Imaging Laboratory
- 7000 Mons
- Belgium
| | - S. Boutry
- University of Mons
- General
- Organic and Biomedical Chemistry NMR and Molecular Imaging Laboratory
- 7000 Mons
- Belgium
| | - S. Begin-Colin
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg
- F-67000 Strasbourg
- France
| | - F. Meyer
- Université de Strasbourg
- INSERM
- UMR 1121 Biomatériaux et Bioingénierie
- 67000 Strasbourg
- France
| | - S. Laurent
- University of Mons
- General
- Organic and Biomedical Chemistry NMR and Molecular Imaging Laboratory
- 7000 Mons
- Belgium
| | - D. Felder-Flesch
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg
- F-67000 Strasbourg
- France
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33
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Detroz B, Laurent S, Honoré P, Blaffart F, Limet R, Meurisse M. Rationale for Hyperthermic Intraperitoneal Chemotherapy (HIPEC) in the Treatment or Prevention of Peritoneal Carcinomatosis. Acta Chir Belg 2016. [DOI: 10.1080/00015458.2004.11679577] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- B. Detroz
- Department of Abdominal Surgery, Department of Cardio-vascular Surgery (*) CHU of Liège, Belgium
| | - S. Laurent
- Department of Abdominal Surgery, Department of Cardio-vascular Surgery (*) CHU of Liège, Belgium
| | - P. Honoré
- Department of Abdominal Surgery, Department of Cardio-vascular Surgery (*) CHU of Liège, Belgium
| | - F. Blaffart
- Department of Abdominal Surgery, Department of Cardio-vascular Surgery (*) CHU of Liège, Belgium
| | - R. Limet
- Department of Abdominal Surgery, Department of Cardio-vascular Surgery (*) CHU of Liège, Belgium
| | - M. Meurisse
- Department of Abdominal Surgery, Department of Cardio-vascular Surgery (*) CHU of Liège, Belgium
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Marais L, Pernot M, Khettab H, Tanter M, Messas E, Zidi M, Laurent S, Boutouyrie P. [OP.8D.03] MEASUREMENT OF ARTERIAL STIFFNESS BY ULTRAFAST ECHO. J Hypertens 2016. [DOI: 10.1097/01.hjh.0000491610.66462.6d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Laurent G, Bernhard C, Dufort S, Jiménez Sánchez G, Bazzi R, Boschetti F, Moreau M, Vu TH, Collin B, Oudot A, Herath N, Requardt H, Laurent S, Vander Elst L, Muller R, Dutreix M, Meyer M, Brunotte F, Perriat P, Lux F, Tillement O, Le Duc G, Denat F, Roux S. Minor changes in the macrocyclic ligands but major consequences on the efficiency of gold nanoparticles designed for radiosensitization. Nanoscale 2016; 8:12054-12065. [PMID: 27244570 DOI: 10.1039/c6nr01228k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Many studies have been devoted to adapting the design of gold nanoparticles to efficiently exploit their promising capability to enhance the effects of radiotherapy. In particular, the addition of magnetic resonance imaging modality constitutes an attractive strategy for enhancing the selectivity of radiotherapy since it allows the determination of the most suited delay between the injection of nanoparticles and irradiation. This requires the functionalization of the gold core by an organic shell composed of thiolated gadolinium chelates. The risk of nephrogenic systemic fibrosis induced by the release of gadolinium ions should encourage the use of macrocyclic chelators which form highly stable and inert complexes with gadolinium ions. In this context, three types of gold nanoparticles (Au@DTDOTA, Au@TADOTA and Au@TADOTAGA) combining MRI, nuclear imaging and radiosensitization have been developed with different macrocyclic ligands anchored onto the gold cores. Despite similarities in size and organic shell composition, the distribution of gadolinium chelate-coated gold nanoparticles (Au@TADOTA-Gd and Au@TADOTAGA-Gd) in the tumor zone is clearly different. As a result, the intravenous injection of Au@TADOTAGA-Gd prior to the irradiation of 9L gliosarcoma bearing rats leads to the highest increase in lifespan whereas the radiophysical effects of Au@TADOTAGA-Gd and Au@TADOTA-Gd are very similar.
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Affiliation(s)
- G Laurent
- Institut UTINAM, UMR 6213 CNRS-UBFC, Université de Bourgogne Franche-Comté, 25030 Besançon Cedex, France.
| | - C Bernhard
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302 CNRS-UBFC, Université de Bourgogne Franche-Comté, 21078 Dijon Cedex, France
| | - S Dufort
- Nano-H S.A.S, 2 Place de l'Europe, 38070 Saint Quentin-Fallavier, France
| | - G Jiménez Sánchez
- Institut UTINAM, UMR 6213 CNRS-UBFC, Université de Bourgogne Franche-Comté, 25030 Besançon Cedex, France.
| | - R Bazzi
- Institut UTINAM, UMR 6213 CNRS-UBFC, Université de Bourgogne Franche-Comté, 25030 Besançon Cedex, France.
| | | | - M Moreau
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302 CNRS-UBFC, Université de Bourgogne Franche-Comté, 21078 Dijon Cedex, France
| | - T H Vu
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302 CNRS-UBFC, Université de Bourgogne Franche-Comté, 21078 Dijon Cedex, France
| | - B Collin
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302 CNRS-UBFC, Université de Bourgogne Franche-Comté, 21078 Dijon Cedex, France and Plateforme d'imagerie préclinique, Centre Georges-François Leclerc, 21079 Dijon Cedex, France
| | - A Oudot
- Plateforme d'imagerie préclinique, Centre Georges-François Leclerc, 21079 Dijon Cedex, France
| | - N Herath
- Recombinaison, réparation et cancer: de la molécule au patient, Institut Curie, UMR CNRS 3347 - Inserm U1021, 91405 Orsay, France
| | - H Requardt
- ID17 Biomedical Beamline, European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - S Laurent
- NMR Laboratory, Université de Mons, 7000 Mons, Belgium
| | - L Vander Elst
- NMR Laboratory, Université de Mons, 7000 Mons, Belgium
| | - R Muller
- NMR Laboratory, Université de Mons, 7000 Mons, Belgium
| | - M Dutreix
- Recombinaison, réparation et cancer: de la molécule au patient, Institut Curie, UMR CNRS 3347 - Inserm U1021, 91405 Orsay, France
| | - M Meyer
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302 CNRS-UBFC, Université de Bourgogne Franche-Comté, 21078 Dijon Cedex, France
| | - F Brunotte
- Plateforme d'imagerie préclinique, Centre Georges-François Leclerc, 21079 Dijon Cedex, France
| | - P Perriat
- Matériaux Ingénierie et Science, UMR 5510 CNRS-INSA, INSA de Lyon, 69621 Villeurbanne Cedex, France
| | - F Lux
- Institut Lumière Matière, UMR 5306 CNRS-UCBL, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - O Tillement
- Institut Lumière Matière, UMR 5306 CNRS-UCBL, Université de Lyon, 69622 Villeurbanne Cedex, France
| | - G Le Duc
- ID17 Biomedical Beamline, European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - F Denat
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302 CNRS-UBFC, Université de Bourgogne Franche-Comté, 21078 Dijon Cedex, France
| | - S Roux
- Institut UTINAM, UMR 6213 CNRS-UBFC, Université de Bourgogne Franche-Comté, 25030 Besançon Cedex, France.
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Guilleminault L, Laurent S, Foucher A, Poubeau P, Paganin F. Pulmonary arterial hypertension in adult onset Still's disease: a case report of a severe complication. BMC Pulm Med 2016; 16:72. [PMID: 27160441 PMCID: PMC4862120 DOI: 10.1186/s12890-016-0237-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 02/15/2016] [Accepted: 05/01/2016] [Indexed: 12/02/2022] Open
Abstract
Background Adult onset of Still’s disease (AOSD) is a rare systemic inflammatory disease. Cardiorespiratory complications are mainly represented by pleural and pericardial disorders and are less frequent than cutaneous and articular complaints. Pulmonary arterial hypertension (PAH) occurring in AOSD is rarely described in literature. Case presentation We present the case of a young patient who developed severe PAH 2 years after diagnosis of AOSD. This is a rare and severe complication which is probably underestimated. Conclusions PAH in AOSD can be lethal, and unfortunately its occurrence is unpredictable. Echocardiographic screening of AOSD patients should be evaluated in further trials. Currently, the most suitable treatment is still unknown. Electronic supplementary material The online version of this article (doi:10.1186/s12890-016-0237-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- L Guilleminault
- Service de Pneumologie, CHU Reunion/GHSR, Saint-Pierre, F-97410, France. .,Inserm, UMR 1188 Diabète athérothrombose Thérapies Réunion Océan Indien (DéTROI), plateforme CYROI, Sainte-Clotilde, F-97490, France. .,Université de La Réunion, UMR 1188, Sainte-Clotilde, F-97490, France. .,Service de Pneumologie, Groupe Hospitalier Sud Réunion, BP 350, 97448, Saint-Pierre cedex, France.
| | - S Laurent
- Service de Pneumologie, CHU Reunion/GHSR, Saint-Pierre, F-97410, France
| | - A Foucher
- Service de maladies infectieuses, CHU Reunion/GHSR, Saint-Pierre, F-97410, France
| | - P Poubeau
- Service de maladies infectieuses, CHU Reunion/GHSR, Saint-Pierre, F-97410, France
| | - F Paganin
- Service de Pneumologie, CHU Reunion/GHSR, Saint-Pierre, F-97410, France.,Université de La Réunion, UMR 1188, Sainte-Clotilde, F-97490, France
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Fadlallah J, Rammaert B, Laurent S, Lanternier F, Pol S, Franck N, Mamzer M, Dupin N, Lortholary O. Mycobacterium aviumcomplex disseminated infection in a kidney transplant recipient. Transpl Infect Dis 2016; 18:105-11. [DOI: 10.1111/tid.12478] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 06/28/2015] [Accepted: 09/20/2015] [Indexed: 01/20/2023]
Affiliation(s)
- J. Fadlallah
- Université Paris Descartes; Centre d'Infectiologie Necker Pasteur; IHU Imagine; Hôpital Necker Enfants Malades; Assistance Publique-Hôpitaux de Paris (APHP); Paris France
| | - B. Rammaert
- Université Paris Descartes; Centre d'Infectiologie Necker Pasteur; IHU Imagine; Hôpital Necker Enfants Malades; Assistance Publique-Hôpitaux de Paris (APHP); Paris France
| | - S. Laurent
- Service d'anatomopathologie; Hôpital Cochin; Université Paris Descartes; APHP; Paris France
| | - F. Lanternier
- Université Paris Descartes; Centre d'Infectiologie Necker Pasteur; IHU Imagine; Hôpital Necker Enfants Malades; Assistance Publique-Hôpitaux de Paris (APHP); Paris France
| | - S. Pol
- Service d'hépatologie; Hôpital Cochin; Université Paris Descartes; APHP; Paris France
| | - N. Franck
- Service de dermatologie; Hôpital Cochin; Pavillon Tarnier; Université Paris Descartes; APHP; Paris France
| | - M.F. Mamzer
- Service de transplantation rénale; Hôpital Necker Enfants Malades; Université Paris Descartes; APHP; Paris France
| | - N. Dupin
- Service de dermatologie; Hôpital Cochin; Pavillon Tarnier; Université Paris Descartes; APHP; Paris France
| | - O. Lortholary
- Université Paris Descartes; Centre d'Infectiologie Necker Pasteur; IHU Imagine; Hôpital Necker Enfants Malades; Assistance Publique-Hôpitaux de Paris (APHP); Paris France
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Frumholtz L, Aumaître O, Maurier F, Ruivard M, Laurent S, Puéchal X, Aractingi S, Le Jeunne C, Mouthon L, Guillevin L, Dupin N, Terrier B. Manifestations cutanées au cours des vascularites associées aux ANCA : étude dans une cohorte de 1535 patients. Rev Med Interne 2015. [DOI: 10.1016/j.revmed.2015.10.250] [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: 11/26/2022]
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Feld A, Maddick A, Laurent S. Safeguarding children in osteopathic practice part 2: Managing concerns about children. INT J OSTEOPATH MED 2015. [DOI: 10.1016/j.ijosm.2015.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
Gastric duplication cyst is an uncommon entity and management is principally surgical. Diagnosis is often delayed because of the non-specific nature of symptoms. The authors report one case of gastric duplication cyst incidentally diagnosed in a 23-year-old man. He had no specific symptoms but follow up of the unknown retro gastric mass showed an increase in size and cholelithiasis. Magnetic resonance imaging (MRI) was not useful for diagnosis but an endoscopic ultrasound suggested a GIST. The growing size of the mass led to a laparoscopic resection. Histopathology showed a gastric duplication cyst boarded with gastric and respiratory ciliated epithelium. This respiratory differenciation is extremely rare. Our patient is the 25th case reported in the literature. The embryologic origin, diagnosis tools and treatment of those rare cysts are briefly reviewed.
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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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Dupieux C, Blondé R, Bouchiat C, Meugnier H, Bes M, Laurent S, Vandenesch F, Laurent F, Tristan A. Community-acquired infections due to Staphylococcus argenteus lineage isolates harbouring the Panton-Valentine leucocidin, France, 2014. ACTA ACUST UNITED AC 2015; 20. [PMID: 26084314 DOI: 10.2807/1560-7917.es2015.20.23.21154] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We describe two cases of human infections caused by Staphylococcus aureus clonal complex (CC) 75, also called Staphylococcus argenteus, harbouring the Panton-Valentine leucocidin (PVL). These two sporadic cases were community-acquired, and identified in France in 2014. Both had an epidemiological link with Mayotte, an overseas department of France located in the Indian Ocean off the south-eastern African coast. This report illustrates that, contrary to previous descriptions, S. argenteus can acquire important virulence factors and be responsible for severe infections.
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Affiliation(s)
- C Dupieux
- Centre National de Reference des Staphylocoques, Centre de Biologie et de Pathologie Est, Hospices Civils de Lyon, Bron, France
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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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Stoer S, Soulat G, Tavolaro S, Millasseau S, Khettab H, Boutouyrie P, Laurent S, Mousseaux* E. P2.19 COMPARISON OF BRACHIAL AND CENTRAL BLOOD PRESSURES FROM 2 SPHYGMOCOR XCEL SYSTEMS EQUIPPED WITH A 2M AND 6M-LONG HOSE. Artery Res 2015. [DOI: 10.1016/j.artres.2015.10.224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Delcroix MF, Laurent S, Huet GL, Dupont-Gillain CC. Protein adsorption can be reversibly switched on and off on mixed PEO/PAA brushes. Acta Biomater 2015; 11:68-79. [PMID: 25234158 DOI: 10.1016/j.actbio.2014.09.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [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: 03/28/2014] [Revised: 09/04/2014] [Accepted: 09/09/2014] [Indexed: 12/25/2022]
Abstract
Adsorption of proteins on surfaces placed in biological fluids is a ubiquitous and mostly irreversible phenomenon, desirable or not, but often uncontrolled. Adsorption of most proteins on poly(ethylene oxide) (PEO) brushes is very limited, while the amount of proteins adsorbed on poly(acrylic acid) (PAA) brushes varies with the pH and ionic strength (I) of the protein solution. Mixed brushes of PEO and PAA are designed here to reversibly adsorb and desorb albumin, lysozyme, collagen and immunoglobulin G, four very different proteins in terms of size, solubility and isoelectric point. Protein adsorption and desorption are monitored using X-ray photoelectron spectroscopy, as well as with quartz crystal microbalance for in situ and real-time measurements. Large amounts of protein are adsorbed and then nearly completely desorbed on mixed PEO/PAA brushes by a simple pH and I trigger. The mixed brushes thus nicely combine the properties of pure PAA and pure PEO brushes. These adsorption/desorption cycles are shown to be repeated with high efficiency. The high-performance smart substrates created here could find applications in domains as diverse as biosensors, drug delivery and nanotransport.
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Affiliation(s)
- M F Delcroix
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1 (L7.04.01), 1348 Louvain-la-Neuve, Belgium
| | - S Laurent
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1 (L7.04.01), 1348 Louvain-la-Neuve, Belgium
| | - G L Huet
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1 (L7.04.01), 1348 Louvain-la-Neuve, Belgium
| | - C C Dupont-Gillain
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1 (L7.04.01), 1348 Louvain-la-Neuve, Belgium.
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Walter A, Garofalo A, Parat A, Jouhannaud J, Pourroy G, Voirin E, Laurent S, Bonazza P, Taleb J, Billotey C, Vander Elst L, Muller RN, Begin-Colin S, Felder-Flesch D. Validation of a dendron concept to tune colloidal stability, MRI relaxivity and bioelimination of functional nanoparticles. J Mater Chem B 2015; 3:1484-1494. [DOI: 10.1039/c4tb01954g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A dendritic coating induces colloidal stability of nanoparticles through electrostatic and steric interactions.
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Lheure C, Kramkimel N, Franck N, Laurent S, Carlotti A, Queant A, Goldwasser F, Dupin N, Avril MF. Sarcoïdose sous inhibiteur de BRAF : une activation paradoxale auto-immune. Ann Dermatol Venereol 2014. [DOI: 10.1016/j.annder.2014.09.396] [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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Rigaux G, Roullin VG, Cadiou C, Portefaix C, Van Gulick L, Bœuf G, Andry MC, Hoeffel C, Vander Elst L, Laurent S, Muller R, Molinari M, Chuburu F. A new magnetic resonance imaging contrast agent loaded into poly(lacide-co-glycolide) nanoparticles for long-term detection of tumors. Nanotechnology 2014; 25:445103. [PMID: 25325295 DOI: 10.1088/0957-4484/25/44/445103] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The incorporation of a lipophilic Gd chelate (GdDO3A-C12) in biocompatible PLGA poly(D, L-lactide-co-glycolide) nanoparticles was explored as an approach to increase the relaxivity of contrast agents for magnetic resonance imaging. By nanoprecipitation, it was possible to obtain PEGylated gadolinium nanoparticles (mean diameter of 155 nm) with high Gd loading (1.1 × 10(4) Gd centers per nanoparticle). The corresponding GdDO3AC12 ⊂ NPs nanoparticles exhibited an enhanced relaxivity (up to sixfold greater than DOTAREM® at 40 MHz) because the nanoparticle framework constrained the lipophilic Gd chelate motion and favorably impacted the Gd chelate rotational correlation time. T1-weighted imaging at 3 T on phantoms showed enhanced contrast for the GdDO3AC12 ⊂ NPs. Importantly, Gd chelate leakage was almost nonexistent, which suggested that these GdDO3AC12 ⊂ NPs could be useful for long-term MRI detection.
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Affiliation(s)
- G Rigaux
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, Bâtiment 18-Europol'Agro, BP1039, F-51687 Reims Cedex 2, France. Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR Pharmacie Reims, 51 rue Cognacq-Jay, F-51100 Reims, France
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