1
|
Iglicki D, Kahn ML, Goubault C, Blot M, Jarry U, Pedeux R, Le Guével R, Chevance S, Gauffre F. Simple elaboration of drug-SPION nanocapsules (hybridosomes®) by solvent shifting: Effect of the drug molecular structure and concentration. Int J Pharm 2024; 649:123645. [PMID: 38040393 DOI: 10.1016/j.ijpharm.2023.123645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 11/23/2023] [Accepted: 11/27/2023] [Indexed: 12/03/2023]
Abstract
Drug nanocapsules coated with iron oxide nanoparticles (SPION) were elaborated by the simultaneous nanoprecipitation of the drug and the nanoparticles, through solvent shifting. We examined four drugs: sorafenib, sorafenib tosylate, α-tocopherol and paclitaxel, to cover the cases of molecular solids, ionic solids, and molecular liquids. We first investigated the formation of the drug core in the final mixture of solvents at different concentrations. A Surfactant-Free Micro-Emulsion domain (SFME, thermodynamically stable) was observed at low drug concentration and an Ouzo domain (metastable) at high drug concentration, except for the case of paclitaxel which crystallizes at high concentration without forming an Ouzo domain. When co-nanoprecipitated with the molecular drugs in the Ouzo domain (sorafenib or α-tocopherol), the SPION limited the coalescence of the drug particles to less than 100 nm, forming capsules with a drug encapsulation efficiency of ca 80 %. In contrast, larger capsules were formed from the SFME or when using the ionic form (sorafenib tosylate). Finally, the sorafenib-SPION capsules exhibit a similar chemotherapeutic effect as the free drug on the hepatocellular carcinoma in vitro.
Collapse
Affiliation(s)
| | | | | | - Marielle Blot
- Univ Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France
| | - Ulrich Jarry
- Univ Rennes, CNRS, INSERM, BIOSIT UAR 3480, US_S 018, Oncotrial, F-35000 Rennes, France; Biotrial Pharmacology, Unité de Pharmacologie Préclinique, Rennes, France
| | - Rémy Pedeux
- Univ Rennes, CNRS, INSERM, BIOSIT UAR 3480, US_S 018, Oncotrial, F-35000 Rennes, France; Univ Rennes, INSERM, OSS (Oncogenesis Stress Signaling), UMR_S 1242, CLCC Eugène Marquis, F-35042, Rennes, France
| | - Rémy Le Guével
- Univ Rennes, CNRS, INSERM, BIOSIT UAR 3480, US_S 018, Impaccell, F-35000 Rennes, France
| | | | | |
Collapse
|
2
|
Iglicki D, Goubault C, Nour Mahamoud M, Chevance S, Gauffre F. Shedding light on the formation and stability of mesostructures in ternary "Ouzo" mixtures. J Colloid Interface Sci 2023; 633:72-81. [PMID: 36436349 DOI: 10.1016/j.jcis.2022.11.060] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/10/2022] [Accepted: 11/11/2022] [Indexed: 11/17/2022]
Abstract
HYPOTHESIS Ternary systems made of water, a water-miscible solvent, and hydrophobic solutes spontaneously produce metastable particles by the "Ouzo effect" and thermodynamically stable "Surfactant-Free Micro Emulsions" (SFME). However, the use of different analyses has led to a variability in the criteria to determine the boundaries of the Ouzo domain. We hypothesized that this could be clarified by investigating the stability and the physical state of the particles. EXPERIMENTS We investigate four systems using both solid and liquid solutes and two different solvents, and achieved a careful investigation of their phase diagrams, using DLS, Nanoparticle Tracking Analysis, NMR, Multiple Light Scattering, electrophoretic mobility, and fluorescence analysis. FINDINGS Our results evidence that the transition from the monophasic to the Ouzo domains does not coincide with the cloudiness curve, and that compositions in the Ouzo domain can look fully transparent, in contrast to what is often considered. This transition is best determined by stability analysis. The cloudiness curve corresponds to the formation of particles with a large size dispersity. In the Ouzo domain, we observed an exchange of solute between the continuous phase and solute particles swollen with solvent. In addition, the particles are stabilized against coalescence by their high negative charge.
Collapse
Affiliation(s)
- Déborah Iglicki
- Univ Rennes, CNRS, ISCR - UMR 6226, ScanMat - UAR 2025, F-35000 Rennes, France.
| | - Clément Goubault
- Univ Rennes, CNRS, ISCR - UMR 6226, ScanMat - UAR 2025, F-35000 Rennes, France.
| | | | - Soizic Chevance
- Univ Rennes, CNRS, ISCR - UMR 6226, ScanMat - UAR 2025, F-35000 Rennes, France.
| | - Fabienne Gauffre
- Univ Rennes, CNRS, ISCR - UMR 6226, ScanMat - UAR 2025, F-35000 Rennes, France.
| |
Collapse
|
3
|
Goubault C, Jarry U, Bostoën M, Éliat PA, Kahn ML, Pedeux R, Guillaudeux T, Gauffre F, Chevance S. Radiosensitizing Fe-Au nanocapsules (hybridosomes®) increase survival of GL261 brain tumor-bearing mice treated by radiotherapy. Nanomedicine 2022; 40:102499. [PMID: 34843982 DOI: 10.1016/j.nano.2021.102499] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/30/2021] [Accepted: 11/11/2021] [Indexed: 11/29/2022]
Abstract
Glioblastoma remains a cancer for which the effectiveness of treatments has shown little improvement over the last decades. For this pathology, multiple therapies combining resection, chemotherapy and radiotherapy remain the norm. In this context, the use of high-Z nanoparticles such as gold or hafnium to potentiate radiotherapy is attracting more and more attention. Here, we evaluate the potentiating effect of hollow shells made of gold and iron oxide nanoparticles (hybridosomes®) on the radiotherapy of glioblastoma, using murine GL261-Luc+ brain tumor model. While iron oxide seems to have no beneficial effect for radiotherapy, we observe a real effect of gold nanoparticles-despite their low amount-with a median survival increase of almost 20% compared to radiotherapy only and even 33% compared to the control group. Cellular and in vivo studies show that a molecule of interest nano-precipitated in the core of the hybridosomes® is released and internalized by the surrounding brain cells. Finally, in vivo studies show that hybridosomes® injected intra-tumorally are still present in the vicinity of the brain tumor more than 5 days after injection (duration of the Stupp protocol's radiation treatment). Interestingly, one mouse treated with radiotherapy in the presence of gold-containing hybridosomes® survived 78 days. Monitoring of the tumoral growth of this long-term survivor using both MRI and bioluminescence revealed a decrease of the tumor size after treatment. These very encouraging results are a proof-of-concept that hybridosomes® are really effective tools for the development of combined therapies (chemo-radiotherapy).
Collapse
Affiliation(s)
| | - Ulrich Jarry
- Univ Rennes, CNRS, INSERM, BIOSIT-UMS 3480, US_S 018, Oncotrial, Rennes F-35000, France; Biotrial Pharmacology, Unité De Pharmacologie Préclinique, Rennes, France
| | - Mégane Bostoën
- Univ Rennes, CNRS, INSERM, BIOSIT-UMS 3480, US_S 018, Oncotrial, Rennes F-35000, France
| | - Pierre-Antoine Éliat
- Univ Rennes, CNRS, INSERM, BIOSIT - UMS 3480, US_S 018, Prism Bio-Scan, F-35000 Rennes, France; Univ Rennes, INRAE, INSERM, Institut NUMECAN - UMR_A 1341, UMR_S 1241, Rennes F-35000, France
| | | | - Rémy Pedeux
- Univ Rennes, INSERM, COSS - UMR_S 1242, LCC Eugène Marquis, Rennes F-35000, France
| | - Thierry Guillaudeux
- Univ Rennes, CNRS, INSERM, BIOSIT-UMS 3480, US_S 018, Oncotrial, Rennes F-35000, France
| | | | | |
Collapse
|
4
|
Goubault C, Iglicki D, Swain RA, McVey BFP, Lefeuvre B, Rault L, Nayral C, Delpech F, Kahn ML, Chevance S, Gauffre F. Effect of nanoparticles on spontaneous Ouzo emulsification. J Colloid Interface Sci 2021; 603:572-581. [PMID: 34216953 DOI: 10.1016/j.jcis.2021.06.104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 10/21/2022]
Abstract
Particles stabilize fluid interfaces. In particular, oil/water Pickering emulsions undergo limited coalescence, yielding droplets of smaller size as the amount of particles is increased. Herein, we studied the effect of hydrophobic nanoparticles (<10 nm, alkyl-coated) on submicronic droplets (ca 100 nm) formed in an Ouzo system. We investigated thoroughly the water/tetrahydrofuran (THF)/butylated hydroxytoluene (BHT) reference diagram, in the absence and in the presence of nanoparticles, using the Nanoparticle Tracking Analysis (NTA) technique. This allowed us to characterize the size distributions in a much finer way than what is usually obtained using conventional Dynamic Light Scattering (DLS). Both a Surfactant-Free Microemulsion (SFME, thermodynamically stable) and an Ouzo (metastable spontaneous emulsion) domains were identified and the transition from one to the other could be characterized by specific features of the droplet size distributions. We found that the presence of the nanoparticles limits coalescence in the metastable domain. We also show that the alkyl-coated nanoparticles are irreversibly attached to the liquid-liquid interface.
Collapse
Affiliation(s)
| | | | - Robert A Swain
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, F-31077 Toulouse, France
| | - Benjamin F P McVey
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, F-31077 Toulouse, France
| | | | - Ludivine Rault
- Univ Rennes, CNRS, ScanMAT - UMS 2001, F-35000 Rennes, France
| | - Céline Nayral
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, F-31077 Toulouse, France
| | - Fabien Delpech
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, F-31077 Toulouse, France
| | | | | | | |
Collapse
|
5
|
Cohen-Tannoudji L, Bertrand E, Baudry J, Robic C, Goubault C, Pellissier M, Johner A, Thalmann F, Lee NK, Marques CM, Bibette J. Measuring the kinetics of biomolecular recognition with magnetic colloids. Phys Rev Lett 2008; 100:108301. [PMID: 18352236 DOI: 10.1103/physrevlett.100.108301] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2007] [Indexed: 05/26/2023]
Abstract
We introduce a general methodology based on magnetic colloids to study the recognition kinetics of tethered biomolecules. Access to the full kinetics of the reaction is provided by an explicit measure of the time evolution of the reactant densities. Binding between a single ligand and its complementary receptor is here limited by the colloidal rotational diffusion. It occurs within a binding distance that can be extracted by a reaction-diffusion theory that properly accounts for the rotational Brownian dynamics. Our reaction geometry allows us to probe a large diversity of bioadhesive molecules and tethers, thus providing a quantitative guidance for designing more efficient reactive biomimetic surfaces, as required for diagnostic, therapeutic, and tissue engineering techniques.
Collapse
Affiliation(s)
- L Cohen-Tannoudji
- ESPCI, UMR 7612, Laboratoire Colloïdes et Matériaux Divisés, ParisTech, 10 rue Vauquelin, Paris, F-75005 France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Baudry J, Rouzeau C, Goubault C, Robic C, Cohen-Tannoudji L, Koenig A, Bertrand E, Bibette J. Acceleration of the recognition rate between grafted ligands and receptors with magnetic forces. Proc Natl Acad Sci U S A 2006; 103:16076-8. [PMID: 17050677 PMCID: PMC1637538 DOI: 10.1073/pnas.0607991103] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [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: 11/18/2022] Open
Abstract
When ligands and receptors are both attached on surfaces, because of the restriction of configurational freedom, their recognition kinetics may be substantially reduced as compared with freely diffusing species. In nature, this reduction may influence the efficiency of the capture and adhesion of circulating cells. Here we show that similar consequences are observed for colloids grafted with biomolecules that are used as probes for diagnostics. We exploit Brownian magnetic colloids that self-assemble into linear chains to show also that the resulting one-dimensional confinement considerably accelerates the recognition rate between grafted receptors and their ligands. We propose that because confinement significantly augments the colliding frequency, it also causes a large increase in the attempt frequency of the recognition. This work gives the basis of a rapid, homogeneous, and highly sensitive bioanalysis method.
Collapse
Affiliation(s)
- J Baudry
- Laboratoire Colloïdes et Matériaux Divisés, Unité Mixte de Recherche 7612, Université Pierre et Marie Curie, CNRS-Ecole Supérieure de Physique et de Chimie Industrielles, 10 Rue Vauquelin, F-75005 Paris, France.
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Goubault C, Jop P, Fermigier M, Baudry J, Bertrand E, Bibette J. Flexible magnetic filaments as micromechanical sensors. Phys Rev Lett 2003; 91:260802. [PMID: 14754035 DOI: 10.1103/physrevlett.91.260802] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2003] [Revised: 07/02/2003] [Indexed: 05/22/2023]
Abstract
We propose a new micromechanical approach to probe bending rigidity at molecular scale. Long flexible filaments made of magnetic colloids and linkers are shown to adopt under magnetic field a hairpin configuration. Measuring the hairpin curvature as a function of the field intensity and the linker length from diffracted light allows us to deduce the linker bending rigidity kappa. The technique is presented for two types of linkers: a spontaneously adsorbing polymer and a grafted biomolecular.
Collapse
Affiliation(s)
- C Goubault
- Laboratoire Colloïdes et Matériaux Divisés, UMR 7612, ESPCI, 10 rue Vauquelin, 75005 Paris, France
| | | | | | | | | | | |
Collapse
|
8
|
Collardeau M, Brisswalter J, Vercruyssen F, Audiffren M, Goubault C. Single and choice reaction time during prolonged exercise in trained subjects: influence of carbohydrate availability. Eur J Appl Physiol 2001; 86:150-6. [PMID: 11822474 DOI: 10.1007/s004210100513] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The aim of the present study was to examine the effects of prolonged exercise at the ventilatory threshold and carbohydrate ingestion on single (SRT) and choice (CRT) reaction time. Eight well-trained triathletes completed three testing sessions within a 3-week period. Maximal oxygen uptake was determined in the first test, whereas the second and the third sessions were composed of a 100-min run (treadmill 15 min, overground 70 min, treadmill 15 min) performed at the velocity associated with the ventilatory threshold. During these submaximal tests, the subjects ingested (in random order) 8 ml x kg(-1) body weight of either a placebo (Pl) or 5.5% carbohydrate (CHO) solution prior to the first submaximal run and 2 ml x kg(-1) body weight every 15 min after that. The cognitive tasks were performed before and after exercise for CRT, and before, during each submaximal run and after exercise for SRT. Furthermore, at the end of each submaximal test subjects were asked to report their rating of perceived exertion (RPE). Results showed a significant positive effect of CHO ingestion on RPE and CRT performance at the end of exercise, while no effect of exercise duration was found in the Pl condition. After a 100-min run, during the CHO condition, CRT mean (SD) group values decreased from 688.5 (51) ms to 654 (63) ms, while during the Pl condition, RPE mean group values increased from 11 (2) to 16 (1.02) and CRT mean values remained stable [688 (104) ms vs 676 (73.4) ms, P > 0.05]. No similar effect was observed for SRT. These results suggest that CHO-electrolyte ingestion during a 100-min run results in an improvement in the complex cognitive performance measured at the end of that run.
Collapse
Affiliation(s)
- M Collardeau
- Unité Ergonomie Sportive et Performance, Université de Toulon-Var, La Garde, France
| | | | | | | | | |
Collapse
|
9
|
Abstract
BACKGROUND Beta-2 agonists such as salbutamol are used, not only by asthmatic athletes to prevent exercise induced asthma, but also by non-asthmatic athletes as a potentially ergogenic agent. We have investigated whether inhaled salbutamol enhances endurance performance in non-asthmatic athletes. METHODS A prospective double blind, randomised, three way crossover design was used to study the effects of 200 microg and 800 microg inhaled salbutamol versus a placebo in 12 trained triathletes. The treatments were compared in three identical cycle ergometer sessions at 85% of the predetermined maximal oxygen uptake. Lung function, endurance time, metabolic parameters (glucose, potassium, lactate, free fatty acid, and glycerol), and psychomotor performance were evaluated. RESULTS Neither endurance time nor post-exercise bronchodilation were significantly different between the treatments. Metabolic parameters were affected by exercise but not by treatment. CONCLUSIONS Inhaled salbutamol, even in a high dose, did not have a significant effect on endurance performance in non-asthmatic athletes, although the bronchodilating effect of the drug at the beginning of exercise may have improved respiratory adaptation. Our results do not preclude an ergogenic effect of beta2 agonists given by other routes or for a longer period.
Collapse
Affiliation(s)
- C Goubault
- Service d'Explorations Fonctionnelles, Physiologie Respiratoire et de l'Exercice, CHU de Poitiers, 86021 Poitiers, France
| | | | | | | | | | | | | |
Collapse
|
10
|
Goubault C, Perault MC, Leleu E, Bouquet S, Legros P, Vandel B, Denjean A. Effects of inhaled salbutamol in exercising non-asthmatic athletes. Thorax 2001. [DOI: 10.1136/thx.56.9.675] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUNDBeta-2 agonists such as salbutamol are used, not only by asthmatic athletes to prevent exercise induced asthma, but also by non-asthmatic athletes as a potentially ergogenic agent. We have investigated whether inhaled salbutamol enhances endurance performance in non-asthmatic athletes.METHODSA prospective double blind, randomised, three way crossover design was used to study the effects of 200 μg and 800 μg inhaled salbutamol versus a placebo in 12 trained triathletes. The treatments were compared in three identical cycle ergometer sessions at 85% of the predetermined maximal oxygen uptake. Lung function, endurance time, metabolic parameters (glucose, potassium, lactate, free fatty acid, and glycerol), and psychomotor performance were evaluated.RESULTSNeither endurance time nor post-exercise bronchodilation were significantly different between the treatments. Metabolic parameters were affected by exercise but not by treatment.CONCLUSIONSInhaled salbutamol, even in a high dose, did not have a significant effect on endurance performance in non-asthmatic athletes, although the bronchodilating effect of the drug at the beginning of exercise may have improved respiratory adaptation. Our results do not preclude an ergogenic effect of β2 agonists given by other routes or for a longer period.
Collapse
|
11
|
Lévêque J, Brisswalter J, Bernard O, Goubault C. Évaluation des caractéristiques physiologiques des kayakistes de descente de haut niveau de performance. Sci Sports 2001. [DOI: 10.1016/s0765-1597(00)00033-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
12
|
Brisswalter J, Hausswirth C, Vercruyssen F, Collardeau M, Vallier JM, Lepers R, Goubault C. Carbohydrate ingestion does not influence the change in energy cost during a 2-h run in well-trained triathletes. Eur J Appl Physiol 2000; 81:108-13. [PMID: 10552274 DOI: 10.1007/pl00013781] [Citation(s) in RCA: 10] [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: 10/25/2022]
Abstract
The aim of this study was to examine whether the increase in the energy cost of running (C(r)), previously reported to occur at the end of a prolonged run, could be influenced by the ingestion of either an artificially sweetened placebo (Pl) or a 5.5% carbohydrate (CHO) solution. Ten well-trained triathletes completed three testing sessions within a 3-week period. The aim of the first session was to determine maximal oxygen uptake (VO(2)(max)) and the velocity associated with ventilatory threshold (nu(VT)). The second and the third sessions were composed of two submaximal treadmill runs (20 min long, 0% grade, performed at nu(VT)), before and after an 80-min overground run, also conducted at nu(VT). During these submaximal tests, the subjects ingested (in a random order) either a Pl or CHO solution prior to the first submaximal run and every 20 min after that. During the first session, ventilatory threshold (VT) occurred at [mean (SD)] 81.2 (2.5)% VO(2)(max) and 16.5 (0.6) km. h(-1). A significant effect of exercise duration was found on C(r) (DeltaC(r)) at the end of the run, whatever the solution ingested (DeltaC(r) = 5.7% and 7.01% for CHO and Pl, respectively). A reduction in the respiratory exchange ratio (from 0.98 to 0.90) was observed only at the end of the Pl trial. In this study, C(r) seems to be affected only to a minor extent by substrate turnover. Moreover, the increase in the demand for oxygen, estimated from the increase in ventilation, accounted for only a minor proportion of the increase in C(r) (11% and 17% for CHO and Pl, respectively). No correlation was found between the changes in C(r) and the changes in the other physiological parameters recorded. These results suggest, indirectly, that C(r) increases during a 2-h run at 80% VO(2)(max) in well-trained subjects can be explained mainly by alterations in neuromuscular performance, which lead to a decrease in muscle efficiency.
Collapse
Affiliation(s)
- J Brisswalter
- Unité Ergonomie Sportive et Performance, Université de Toulon-Var, Avenue de l'Université, BP 132, F-83957 La Garde Cedex, France.
| | | | | | | | | | | | | |
Collapse
|
13
|
Heugas A, Brisswalter J, Vallier J, Goubault C, Legros P. Reproductibilité du déficit maximal en oxygène (DO2max) en fonction de l'expertise en course à pied. Sci Sports 1998. [DOI: 10.1016/s0765-1597(98)80002-6] [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: 10/18/2022]
|
14
|
Fougeron B, Brisswalter J, Goubault C, Legros P. Le coût énergétique de la marche athlétique : évolution en fonction de la vitesse de déplacement. Sci Sports 1998. [DOI: 10.1016/s0765-1597(97)86906-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
15
|
Beau P, Fabre J, Abitbol JL, Poncin E, Goubault C, Potocki B, Matuchansky C. [Continuous ambulatory enteral feeding in hospitalized adults: prospective experience in 98 patients]. Gastroenterol Clin Biol 1986; 10:134-40. [PMID: 3084332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The goal of this study, which describes a personal technique of continuous enteral nutrition (CEN) in hospitalized adults on an ambulatory basis, was: to prospectively evaluate, over a 2-year period, its efficacy and tolerance in 98 patients requiring CEN for at least 15 days; to compare its efficacy and tolerance with those of conventional non-ambulatory CEN on a prospectively randomized basis in 16 patients. Ambulatory CEN was given at the rate of 35-45 kcal/kg/d (lipids: 35 p. 100; carbohydrates: 45 p. 100); during day-time, a portable system, including pump, tubes and low-viscosity nutrient solutions, allowed ambulation. Ninety-eight consecutive patients with a minimal level of physical autonomy were treated for intestinal (n = 47), pancreatic (n = 20), esophagogastric (n = 17) diseases, or for malnutrition of other causes for an average of 38 days (15 to 141). The average weight gain (m +/- SD) was 1.2 +/- 5.5 p. 100 of ideal body weight (IBW) and the average nitrogen gain was 0.7 +/- 3.8 g/24 h; weight gain proved significantly lower in patients with inflammatory bowel disease receiving steroids. The clinical tolerance proved excellent, except for 5 cases of transient diarrhea and 9 cases of reposition of the nasogastric tube. A decrease in cholesterolemia below 3.9 mmol/l was noted in 25 p. 100 of patients during CEN. No significant difference between ambulatory and non-ambulatory CEN was observed in terms of evolution of body weight and other anthropometric variables, nitrogen balance, albuminemia, and oxygen consumption; conversely, the CEN experience, evaluated by patients on analogical visual scales, was significantly better endured in the ambulatory group.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
|
16
|
Fabre J, Bodet M, Abitbol J, Goubault C, Potocki B, Matuchansky C. P.43 Compared nutritional assessment of ambulatory and nonambulatory continuous enteral nutrition in hospitalized patients. Clin Nutr 1983. [DOI: 10.1016/s0261-5614(83)80151-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|