1
|
de Crane d'Heysselaer S, Bockstal L, Jacquet N, Schmetz Q, Richel A. Potential for the valorisation of brewer's spent grains: A case study for the sequential extraction of saccharides and lignin. Waste Manag Res 2022; 40:1007-1014. [PMID: 34713756 DOI: 10.1177/0734242x211055547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This study highlights the possibility of using brewers' grains (BSGs) for the successive extraction of the main lignocellulosic biopolymers, namely, cellulose, hemicelluloses and lignin. An exhaustive chemical characterisation revealed a variability of composition in distinct batches of BSGs, depending on their origin and the brewing process used. In particular, the protein content can vary from 13wt% to 23wt%, which is accompanied by a change in the hemicelluloses content from 9% to 23% (in the samples of our study). By applying a two-step aqueous treatment, involving an acid (1.25% v/v aq. H2SO4) and a base (3% w/v aq. NaOH) at a temperature of 120°C and fixed reaction time of a few tens of minutes (15-90 minutes), more than 80% of hemicelluloses could be recovered. Cellulose could be isolated at more than 68%, while a high purity lignin could be recovered from a lignin-rich fraction (70wt%). Our work also suggests that the variability of the chemical composition of these BSGs is a hindrance to achieving process standardisation and large-scale exploitation. The pooling of various materials is therefore not a recommended option, and the preliminary chemical analysis of the composition is therefore a prerequisite for an efficient extraction process.
Collapse
Affiliation(s)
| | - Lauris Bockstal
- Laboratory of Biomass and Green Technologies, University of Liege, Gembloux, Belgium
| | - Nicolas Jacquet
- Smart Technologies for Food and Biobased Products, University of Liege, Gembloux, Belgium
| | - Quentin Schmetz
- Laboratory of Biomass and Green Technologies, University of Liege, Gembloux, Belgium
| | - Aurore Richel
- Laboratory of Biomass and Green Technologies, University of Liege, Gembloux, Belgium
| |
Collapse
|
2
|
Chen J, Sun H, Mu T, Blecker C, Richel A, Richard G, Jacquet N, Haubruge E, Goffin D. Effect of temperature on rheological, structural, and textural properties of soy protein isolate pastes for 3D food printing. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2021.110917] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
3
|
|
4
|
Jacquet N, Wurtzer S, Darracq G, Wyart Y, Moulin L, Moulin P. Effect of concentration on virus removal for ultrafiltration membrane in drinking water production. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119417] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
5
|
Jacquet N, Forquin P. Numerical simulation of multi-hit impact on Ceramic/Composite armor. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202125002004] [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: 11/14/2022] Open
Abstract
The numerical simulation of ballistic multi-hit impact on ceramic/composite armors is very challenging. The damage introduced by the previous hit affects the performance of the armor. In composite backings the damage is often more diffused than for metallic backings. Moreover, different sources of damage can intervene within the composite material. The present work proposes a mesoscopic scale approach to assess these issues. The 2D woven material is modelled with beams elements embedded in volume elements. Each component has its own material constitutive law and its damaging law. This approach allows to better model the damaging of the material, but also to better identify the material parameters from a set of basic experiments.
Collapse
|
6
|
Kolh P, Honore P, Gielen JL, Degauque C, Azzam C, Legrand M, Jacquet N. Analysis of Factors Influencing Long-term Survival after Surgical Resection for Oesophageal Squamous Cell Carcinoma. Acta Chir Belg 2020. [DOI: 10.1080/00015458.1999.12098460] [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] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Ph. Kolh
- Department of Surgery, CHU Sart Tilman, Liège, Belgium
| | - P. Honore
- Department of Surgery, CHU Sart Tilman, Liège, Belgium
| | - J.-L. Gielen
- Department of Surgery, CHU Sart Tilman, Liège, Belgium
| | - C. Degauque
- Department of Surgery, CHU Sart Tilman, Liège, Belgium
| | - C. Azzam
- Department of Surgery, CHU Sart Tilman, Liège, Belgium
| | - M. Legrand
- Department of Surgery, CHU Sart Tilman, Liège, Belgium
| | - N. Jacquet
- Department of Surgery, CHU Sart Tilman, Liège, Belgium
| |
Collapse
|
7
|
Affiliation(s)
- O. Detry
- Department of Abdominal Surgery and Transplantation, University of Liège, CHU Sart Tilman, Belgium
| | - P. Honoré
- Department of Abdominal Surgery and Transplantation, University of Liège, CHU Sart Tilman, Belgium
| | - M. Meurisse
- Department of Abdominal Surgery and Transplantation, University of Liège, CHU Sart Tilman, Belgium
| | - N. Jacquet
- Department of Abdominal Surgery and Transplantation, University of Liège, CHU Sart Tilman, Belgium
| |
Collapse
|
8
|
Affiliation(s)
- O. Detry
- Department of Abdominal Surgery and Transplantation, University Hospital of Liège, University of Liège, Sart Tilman B35, B-4000 Liège, Belgium
| | - P. Honoré
- Department of Abdominal Surgery and Transplantation, University Hospital of Liège, University of Liège, Sart Tilman B35, B-4000 Liège, Belgium
| | - M. Meurisse
- Department of Abdominal Surgery and Transplantation, University Hospital of Liège, University of Liège, Sart Tilman B35, B-4000 Liège, Belgium
| | - N. Jacquet
- Department of Abdominal Surgery and Transplantation, University Hospital of Liège, University of Liège, Sart Tilman B35, B-4000 Liège, Belgium
| |
Collapse
|
9
|
|
10
|
Pirenne J, Noizat-Pirenne F, De Groote D, Vrindts Y, Lopez M, Gathy R, Damas P, Meurisse M, Jacquet N, Honoré P, Franchimont P. Intraoperative cytokines production during orthotopic liver transplantation. Transpl Int 2018. [DOI: 10.1111/tri.1992.5.s1.631] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
11
|
Lecart B, Jacquet N, Anseeuw L, Renier M, Njeumen P, Bodson B, Vanderschuren H, Richel A. Nonconventional enzymatic method to determine free asparagine level in whole-grain wheat. Food Chem 2018; 251:64-68. [PMID: 29426425 DOI: 10.1016/j.foodchem.2018.01.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 08/02/2017] [Accepted: 01/02/2018] [Indexed: 11/30/2022]
Abstract
A new enzymatic methodology is herein proposed to measure free asparagine content in wheat grains and to predict their potential for Maillard reaction products. Our model estimates the acrylamide levels generated during the industrial heat treatment of whole-grain wheat based on free asparagine and glucose measurements. We selected fifteen wheat varieties currently grown in Belgium as benchmark for the present study. While conventional chromatographic methods require a long and tedious multi-step sample preparation, the proposed method takes advantage of being simple and quick. Statistical analysis of free asparagine content indicates that selected wheat varieties can be classified into seven content levels from 0.0149% to 0.0216% of the dry matter. Based on our analysis, the varieties KWS Ozon, Benchmark and Pionier appears to be the most suitable for thermal processing (i.e. cooking applications).
Collapse
Affiliation(s)
- Brieuc Lecart
- University of Liège, Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium.
| | - Nicolas Jacquet
- University of Liège, Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium.
| | - Laurent Anseeuw
- University of Liège, Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium.
| | - Margot Renier
- University of Liège, Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium.
| | - Patrick Njeumen
- University of Liège, Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium.
| | - Bernard Bodson
- University of Liège, Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium.
| | - Hervé Vanderschuren
- University of Liège, Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium.
| | - Aurore Richel
- University of Liège, Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium.
| |
Collapse
|
12
|
Odjo S, Huart F, Béra F, Jacquet N, Richel A, Blecker C, Malumba P. Influence of corn variety, drying temperature, and moisture content at harvest on the saccharides released during an in vitro pepsin-pancreatin digestion. STARCH-STARKE 2017. [DOI: 10.1002/star.201600292] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sylvanus Odjo
- Gembloux Agro-Bio Tech, Food Process Engineering Laboratory; University of Liege; Belgium
| | - François Huart
- Gembloux Agro-Bio Tech, Food Process Engineering Laboratory; University of Liege; Belgium
| | - François Béra
- Gembloux Agro-Bio Tech, Food Process Engineering Laboratory; University of Liege; Belgium
| | - Nicolas Jacquet
- Gembloux Agro-Bio Tech, Department of Industrial Biological Chemistry; University of Liege; Belgium
| | - Aurore Richel
- Gembloux Agro-Bio Tech, Department of Industrial Biological Chemistry; University of Liege; Belgium
| | - Christophe Blecker
- Gembloux Agro-Bio Tech, Department of Food Science and Formulation; University of Liege; Belgium
| | - Paul Malumba
- Gembloux Agro-Bio Tech, Food Process Engineering Laboratory; University of Liege; Belgium
| |
Collapse
|
13
|
Istasse T, Jacquet N, Berchem T, Haubruge E, Nguyen BK, Richel A. Extraction of Honey Polyphenols: Method Development and Evidence of Cis Isomerization. Anal Chem Insights 2016; 11:49-57. [PMID: 27547032 PMCID: PMC4981221 DOI: 10.4137/aci.s39739] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 06/27/2016] [Accepted: 07/03/2016] [Indexed: 11/05/2022]
Abstract
Honey polyphenols have been studied with the objective of relating honeys to their floral sources. Initially synthesized by plant, these polyphenols can be found in the plant’s nectar, which are collected by bees, which convert the nectar into honey. Consequently, polyphenols constitute minor components of honey. The development of a solid-phase extraction method for honey polyphenols is presented in this study. The technique employs Amberlite XAD-2 adsorbent and was tested on monofloral honeys from six different plants: acacia, chestnut, eucalyptus, thyme, sunflower, and wild carrot. Analyses were performed using high-performance liquid chromatography coupled with UV detection and mass spectrometry. Several phenolic acids and flavonoids were identified: caffeic and p-coumaric acids, quercetin, kaempferol, naringenin, chrysin, and pinocembrin. Generally, the quantity of a given polyphenol in the honey was around 0.2 mg/100 g of honey, except for chestnut honey, which contained around 3.0 mg of p-coumaric acid/100 g of honey. Analyses highlighted significant formation of cis isomers for phenolic acids during the extraction despite protection from light.
Collapse
Affiliation(s)
- Thibaut Istasse
- Laboratory of Biological and Industrial Chemistry, University of Liege-Gembloux Agro-Bio Tech, Passage des Déportés 2, B-5030 Gembloux, Belgium
| | - Nicolas Jacquet
- Laboratory of Biological and Industrial Chemistry, University of Liege-Gembloux Agro-Bio Tech, Passage des Déportés 2, B-5030 Gembloux, Belgium
| | - Thomas Berchem
- Laboratory of Biological and Industrial Chemistry, University of Liege-Gembloux Agro-Bio Tech, Passage des Déportés 2, B-5030 Gembloux, Belgium
| | - Eric Haubruge
- Laboratory of Biological and Industrial Chemistry, University of Liege-Gembloux Agro-Bio Tech, Passage des Déportés 2, B-5030 Gembloux, Belgium
| | - Bach Kim Nguyen
- Laboratory of Biological and Industrial Chemistry, University of Liege-Gembloux Agro-Bio Tech, Passage des Déportés 2, B-5030 Gembloux, Belgium
| | - Aurore Richel
- Laboratory of Biological and Industrial Chemistry, University of Liege-Gembloux Agro-Bio Tech, Passage des Déportés 2, B-5030 Gembloux, Belgium
| |
Collapse
|
14
|
Nguyen HT, Razafindralambo H, Richel A, Jacquet N, Evrard P, Antoine P, Thonart P, Delvigne F. Erratum to: Scalable temperature induced stress for the large-scale production of functionalized Bifidobacteria. J Ind Microbiol Biotechnol 2016; 43:727. [PMID: 26946318 DOI: 10.1007/s10295-016-1748-4] [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] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Huu Thanh Nguyen
- Natural Products and Industrial Biochemistry Research Group, Faculty of Applied Sciences, Ton Duc Thang University, 19 Nguyen Huu Tho, Tan Phong, Ho Chi Minh, Vietnam.
- Microbial Processes and Interactions (MiPI), Agro-Bio Chem Department, University of Liège, Gembloux Agro-Bio Tech Faculty, Passage des Déportés 2, 5030, Gembloux, Belgium.
| | - Hary Razafindralambo
- Food Technology and Formulation, Agro-Bio Chem Department, University of Liège, Gembloux Agro-Bio Tech Faculty, Passage des Déportés 2, 5030, Gembloux, Belgium
| | - Aurore Richel
- Industrial Biological Chemistry, Agro-Bio Chem Department, University of Liège, Gembloux Agro-Bio Tech Faculty, Passage des Déportés 2, 5030, Gembloux, Belgium
| | - Nicolas Jacquet
- Industrial Biological Chemistry, Agro-Bio Chem Department, University of Liège, Gembloux Agro-Bio Tech Faculty, Passage des Déportés 2, 5030, Gembloux, Belgium
| | - Pol Evrard
- THT Company s.a, Scientific Park of CREALYS, Camille Hubert 17, 5032, Gembloux, Belgium
| | - Patrice Antoine
- THT Company s.a, Scientific Park of CREALYS, Camille Hubert 17, 5032, Gembloux, Belgium
| | - Philippe Thonart
- Microbial Processes and Interactions (MiPI), Agro-Bio Chem Department, University of Liège, Gembloux Agro-Bio Tech Faculty, Passage des Déportés 2, 5030, Gembloux, Belgium
| | - Frank Delvigne
- Microbial Processes and Interactions (MiPI), Agro-Bio Chem Department, University of Liège, Gembloux Agro-Bio Tech Faculty, Passage des Déportés 2, 5030, Gembloux, Belgium.
| |
Collapse
|
15
|
Odjo S, Béra F, Jacquet N, Richel A, Malumba P. Characterization of saccharides released during an in vitro pepsin-pancreatin digestion of corn flour using HPAEC-PAD. STARCH-STARKE 2016. [DOI: 10.1002/star.201500281] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sylvanus Odjo
- Laboratory of Food Process Engineering, University of Liege; Gembloux Agro-Bio Tech; Passage des Déportés Gembloux Belgium
| | - François Béra
- Laboratory of Food Process Engineering, University of Liege; Gembloux Agro-Bio Tech; Passage des Déportés Gembloux Belgium
| | - Nicolas Jacquet
- Department of Industrial Biological Chemistry, University of Liege; Gembloux Agro-Bio Tech; Passage des Déportés Gembloux Belgium
| | - Aurore Richel
- Department of Industrial Biological Chemistry, University of Liege; Gembloux Agro-Bio Tech; Passage des Déportés Gembloux Belgium
| | - Paul Malumba
- Laboratory of Food Process Engineering, University of Liege; Gembloux Agro-Bio Tech; Passage des Déportés Gembloux Belgium
- Department of Chemistry and Agricultural Industry; University of Kinshasa; Kinshasa Democratic Republic of Congo
| |
Collapse
|
16
|
Jacquet N, Haubruge E, Richel A. Production of biofuels and biomolecules in the framework of circular economy: A regional case study. Waste Manag Res 2015; 33:1121-1126. [PMID: 26574581 DOI: 10.1177/0734242x15613154] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Faced to the economic and energetic context of our society, it is widely recognised that an alternative to fossil fuels and oil-based products will be needed in the nearest future. In this way, development of urban biorefinery could bring many solutions to this problem. Study of the implementation of urban biorefinery highlights two sustainable configurations that provide solutions to the Walloon context by promoting niche markets, developing circular economy and reducing transport of supply feedstock. First, autonomous urban biorefineries are proposed, which use biological waste for the production of added value molecules and/or finished products and are energetically self-sufficient. Second, integrated urban biorefineries, which benefit from an energy supply from a nearby industrial activity. In the Walloon economic context, these types of urban biorefineries could provide solutions by promoting niche markets, developing a circular economy model, optimise the transport of supply feedstock and contribute to the sustainable development.
Collapse
Affiliation(s)
- Nicolas Jacquet
- Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| | - Eric Haubruge
- Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| | - Aurore Richel
- Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| |
Collapse
|
17
|
Kamdem I, Jacquet N, Tiappi FM, Hiligsmann S, Vanderghem C, Richel A, Jacques P, Thonart P. Comparative biochemical analysis after steam pretreatment of lignocellulosic agricultural waste biomass from Williams Cavendish banana plant (Triploid Musa AAA group). Waste Manag Res 2015; 33:1022-1032. [PMID: 26264932 DOI: 10.1177/0734242x15597998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The accessibility of fermentable substrates to enzymes is a limiting factor for the efficient bioconversion of agricultural wastes in the context of sustainable development. This paper presents the results of a biochemical analysis performed on six combined morphological parts of Williams Cavendish Lignocellulosic Biomass (WCLB) after steam cracking (SC) and steam explosion (SE) pretreatments. Solid (S) and liquid (L) fractions (Fs) obtained from SC pretreatment performed at 180°C (SLFSC180) and 210°C (SLFSC210) generated, after diluted acid hydrolysis, the highest proportions of neutral sugar (NS) contents, specifically 52.82 ± 3.51 and 49.78 ± 1.39%w/w WCLB dry matter (DM), respectively. The highest proportions of glucose were found in SFSC210 (53.56 ± 1.33%w/w DM) and SFSC180 (44.47 ± 0.00%w/w DM), while the lowest was found in unpretreated WCLB (22.70 ± 0.71%w/w DM). Total NS content assessed in each LF immediately after SC and SE pretreatments was less than 2%w/w of the LF DM, thus revealing minor acid autohydrolysis consequently leading to minor NS production during the steam pretreatment. WCLB subjected to SC at 210 °C (SC210) generated up to 2.7-fold bioaccessible glucan and xylan. SC and SE pretreatments showed potential for the deconstruction of WCLB (delignification, depolymerization, decrystallization and deacetylation), enhancing its enzymatic hydrolysis. The concentrations of enzymatic inhibitors, such as 2-furfuraldehyde and 5-(hydroxymethyl)furfural from LFSC210, were the highest (41 and 21 µg ml(-1), respectively). This study shows that steam pretreatments in general and SC210 in particular are required for efficient bioconversion of WCLB. Yet, biotransformation through biochemical processes (e.g., anaerobic digestion) must be performed to assess the efficiency of these pretreatments.
Collapse
Affiliation(s)
- Irénée Kamdem
- Walloon Centre of Industrial Biology (CWBI), University of Liege, Belgium
| | - Nicolas Jacquet
- Unité de chimie biologique industrielle, University of Liege, Gembloux Agro-Bio Tech, Belgium
| | - Florian Mathias Tiappi
- Unité de chimie biologique industrielle, University of Liege, Gembloux Agro-Bio Tech, Belgium
| | - Serge Hiligsmann
- Walloon Centre of Industrial Biology (CWBI), University of Liege, Belgium
| | - Caroline Vanderghem
- Unité de chimie biologique industrielle, University of Liege, Gembloux Agro-Bio Tech, Belgium
| | - Aurore Richel
- Unité de chimie biologique industrielle, University of Liege, Gembloux Agro-Bio Tech, Belgium
| | - Philippe Jacques
- Walloon Centre of Industrial Biology (CWBI), University of Liege, Belgium
| | - Philippe Thonart
- Walloon Centre of Industrial Biology (CWBI), University of Liege, Belgium
| |
Collapse
|
18
|
Nguyen HT, Razafindralambo H, Richel A, Jacquet N, Evrard P, Antoine P, Thonart P, Delvigne F. Scalable temperature induced stress for the large-scale production of functionalized Bifidobacteria. J Ind Microbiol Biotechnol 2015; 42:1225-31. [PMID: 26162630 DOI: 10.1007/s10295-015-1650-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Accepted: 06/24/2015] [Indexed: 10/23/2022]
Abstract
The application of sub-lethal stresses is known to be an efficient strategy to enhance survival of probiotic bacteria during drying processes. In this context, we previously showed that the application of heat stress upon the entry into stationary phase increased significantly the viability of Bifidobacterium bifidum. However, this heat shock has been considered only in small-scale bioreactor and no information is available for a possible scaling-up strategy. Five different operating scales (0.2, 2, 20, 200 and 2000 L) have thus been tested and the results showed that the viability of B. bifidum increases from 3.15 to 6.57 folds, depending on the scale considered. Our observations pointed out the fact that the heat stress procedure is scalable according to the main outcome, i.e., increases in cell viability, but other factors have to be taken into account. Among these factors, dissolved carbon dioxide seems to play a significant role, since it explains the differences observed between the test performed at laboratory scale and in industrial conditions.
Collapse
Affiliation(s)
- Huu Thanh Nguyen
- Groupe de Biochimie industrielle and Produits naturels, Université de Ton Duc Thang, 19 Nguyen Huu Tho, Tan Phong, Dis. 7, Ho Chi Minh Ville, Vietnam,
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Jacquet N, Maniet G, Vanderghem C, Delvigne F, Richel A. Application of Steam Explosion as Pretreatment on Lignocellulosic Material: A Review. Ind Eng Chem Res 2015. [DOI: 10.1021/ie503151g] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- N. Jacquet
- Department of Industrial Biological Chemistry and ‡Unité
de Bio-industries/CWBI, University of Liège−Gembloux Agro-Bio Tech, Passage des Déportés
No. 2, B-5030 Gembloux, Belgium
| | - G. Maniet
- Department of Industrial Biological Chemistry and ‡Unité
de Bio-industries/CWBI, University of Liège−Gembloux Agro-Bio Tech, Passage des Déportés
No. 2, B-5030 Gembloux, Belgium
| | - C. Vanderghem
- Department of Industrial Biological Chemistry and ‡Unité
de Bio-industries/CWBI, University of Liège−Gembloux Agro-Bio Tech, Passage des Déportés
No. 2, B-5030 Gembloux, Belgium
| | - F. Delvigne
- Department of Industrial Biological Chemistry and ‡Unité
de Bio-industries/CWBI, University of Liège−Gembloux Agro-Bio Tech, Passage des Déportés
No. 2, B-5030 Gembloux, Belgium
| | - A. Richel
- Department of Industrial Biological Chemistry and ‡Unité
de Bio-industries/CWBI, University of Liège−Gembloux Agro-Bio Tech, Passage des Déportés
No. 2, B-5030 Gembloux, Belgium
| |
Collapse
|
20
|
Jacquet N, Navarre C, Desmecht D, Boutry M. Hydrophobin fusion of an influenza virus hemagglutinin allows high transient expression in Nicotiana benthamiana, easy purification and immune response with neutralizing activity. PLoS One 2014; 9:e115944. [PMID: 25541987 PMCID: PMC4277400 DOI: 10.1371/journal.pone.0115944] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 11/30/2014] [Indexed: 12/02/2022] Open
Abstract
The expression of recombinant hemagglutinin in plants is a promising alternative to the current egg-based production system for the influenza vaccines. Protein-stabilizing fusion partners have been developed to overcome the low production yields and the high downstream process costs associated with the plant expression system. In this context, we tested the fusion of hydrophobin I to the hemagglutinin ectodomain of the influenza A (H1N1)pdm09 virus controlled by the hybrid En2PMA4 transcriptional promoter to rapidly produce high levels of recombinant antigen by transient expression in agro-infiltrated Nicotiana benthamiana leaves. The fusion increased the expression level by a factor of ∼ 2.5 compared to the unfused protein allowing a high accumulation level of 8.6% of the total soluble proteins. Hemagglutinin was located in ER-derived protein bodies and was successfully purified by combining an aqueous-two phase partition system and a salting out step. Hydrophobin interactions allowed the formation of high molecular weight hemagglutinin structures, while unfused proteins were produced as monomers. Purified protein was shown to be biologically active and to induce neutralizing antibodies after mice immunization. Hydrophobin fusion to influenza hemagglutinin might therefore be a promising approach for rapid, easy, and low cost production of seasonal or pandemic influenza vaccines in plants.
Collapse
Affiliation(s)
- Nicolas Jacquet
- Institute of Life Sciences, University of Louvain, Louvain-la-Neuve, Belgium
| | - Catherine Navarre
- Institute of Life Sciences, University of Louvain, Louvain-la-Neuve, Belgium
| | - Daniel Desmecht
- Department of Pathology, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Marc Boutry
- Institute of Life Sciences, University of Louvain, Louvain-la-Neuve, Belgium
| |
Collapse
|
21
|
Vanderghem C, Jacquet N, Richel A. Can Lignin Wastes Originating From Cellulosic Ethanol Biorefineries Act as Radical Scavenging Agents? Aust J Chem 2014. [DOI: 10.1071/ch14074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Lignin is a co-product from the biorefinery and paper industries. Its non-energetic valorisation remains a field of extensive research and development. In this perspective, this study was undertaken to evaluate the radical scavenging ability of selected herbaceous lignins. These lignins, extracted from either Miscanthus (Miscanthus × giganteus) or switchgrass (Panicum virgatum L.), were selected as benchmarks for this study based on their chemical structure and average molecular weight. These technical lignins, which are side-products in the bioethanol production process, displayed a moderate antioxidant activity as evaluated by the 1,1-diphenyl-2-picrylhydrazil free radical scavenging test system. A correlation between the radical scavenging properties and the molecular features is proposed and discussed. Infrared spectroscopy was employed as a straightforward qualitative prediction tool for assessing the radical scavenging capacity.
Collapse
|
22
|
Jacquet N, Vanderghem C, Danthine S, Blecker C, Paquot M. Influence of Homogenization Treatment on Physicochemical Properties and Enzymatic Hydrolysis Rate of Pure Cellulose Fibers. Appl Biochem Biotechnol 2013; 169:1315-28. [DOI: 10.1007/s12010-012-0057-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 12/26/2012] [Indexed: 11/28/2022]
|
23
|
Malumba P, Jacquet N, Delimme G, Lefebvre F, Béra F. The swelling behaviour of wheat starch granules during isothermal and non-isothermal treatments. J FOOD ENG 2013. [DOI: 10.1016/j.jfoodeng.2012.08.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
24
|
Jacquet N, Vanderghem C, Danthine S, Quiévy N, Blecker C, Devaux J, Paquot M. Influence of steam explosion on physicochemical properties and hydrolysis rate of pure cellulose fibers. Bioresour Technol 2012; 121:221-227. [PMID: 22858489 DOI: 10.1016/j.biortech.2012.06.073] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 06/18/2012] [Accepted: 06/21/2012] [Indexed: 06/01/2023]
Abstract
The aim of this study is to compare the effect of different steam explosion treatments on the physicochemical properties and the hydrolysis rate of a pure bleached cellulose. The results showed that moderate steam explosion treatments (severity factor below 5.2) did not appear to improve the enzymatic hydrolysis rate of the cellulose fibers. However, characterization of the samples showed a modification of the physicochemical properties of the cellulose, resulting in an increase of the water retention values (WRV) coupled to an increase of the overall crystallinity. For higher treatment intensities, an important thermal degradation of the cellulose was highlighted. This thermal degradation caused an important modification of the cellulose composition which leads to a decrease of the hydrolysis rate.
Collapse
Affiliation(s)
- N Jacquet
- ULg - Gembloux Agro-Bio Tech, Department of Industrial Biological Chemistry, Passage des Déportés N°2, B-5030 Gembloux, Belgium.
| | | | | | | | | | | | | |
Collapse
|
25
|
Jacquet N, Maire MA, Landkocz Y, Vasseur P. Carcinogenic potency of perfluorooctane sulfonate (PFOS) on Syrian hamster embryo (SHE) cells. Arch Toxicol 2011; 86:305-14. [DOI: 10.1007/s00204-011-0752-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 09/14/2011] [Indexed: 12/30/2022]
|
26
|
Vanderghem C, Richel A, Jacquet N, Blecker C, Paquot M. Impact of formic/acetic acid and ammonia pre-treatments on chemical structure and physico-chemical properties of Miscanthus x giganteus lignins. Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.07.022] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
27
|
Jacquet N, Quiévy N, Vanderghem C, Janas S, Blecker C, Wathelet B, Devaux J, Paquot M. Influence of steam explosion on the thermal stability of cellulose fibres. Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.05.021] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
28
|
Jacquet N, Maire MA, Rast C, Bonnard M, Vasseur P. Perfluorooctanoic acid (PFOA) acts as a tumor promoter on Syrian hamster embryo (SHE) cells. Environ Sci Pollut Res Int 2011; 19:2537-2549. [PMID: 22828883 DOI: 10.1007/s11356-012-0968-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Accepted: 05/04/2012] [Indexed: 06/01/2023]
Abstract
Perfluorooctane sulfonate (PFOS) (C(8)F(17)SO(3)) and perfluorooctanoic acid (PFOA) (C(8)HF(15)O(2)) are synthetic chemicals widely used in industrial applications for their hydrophobic and oleophobic properties. They are persistent, bioaccumulative, and toxic to mammalian species. Their widespread distribution on earth and contamination of human serum raised concerns about long-term side effects. They are suspected to be carcinogenic through a nongenotoxic mode of action, a mechanism supported by recent findings that PFOS induced cell transformation but no genotoxicity in Syrian hamster embryo (SHE) cells. In the present study, we evaluated carcinogenic potential of PFOA using the cell transformation assay on SHE cells. The chemical was applied alone or in combination with a nontransformant concentration of benzo[a]pyrene (BaP, 0.4 μM) in order to detect PFOA ability to act as tumor initiator or tumor promoter. The results showed that PFOA tested alone in the range 3.7 × 10(-5) to 300 μM did not induce SHE cell transformation frequency in a 7-day treatment. On the other side, the combination BaP/PFOA induced cell transformation at all PFOA concentrations tested, which revealed synergistic effects. No genotoxicity of PFOA on SHE cells was detected using the comet assay after 5 and 24 h of exposure. No significant increase in DNA breakage was found in BaP-initiated cells exposed to PFOA in a 7-day treatment. The whole results showed that PFOA acts as a tumor promoter and a nongenotoxic carcinogen. Cell transformation in initiated cells was observed at concentrations equivalent to the ones found in human serum of nonoccupationally and occupationally exposed populations. An involvement of PFOA in increased incidence of cancer recorded in occupationally exposed population cannot be ruled out.
Collapse
Affiliation(s)
- N Jacquet
- Laboratory Interactions Ecotoxicology Biodiversity Ecosystems, University Paul Verlaine, CNRS UMR 7146, Rue du General Delestraint, 57070, Metz, France.
| | | | | | | | | |
Collapse
|
29
|
Quiévy N, Jacquet N, Sclavons M, Deroanne C, Paquot M, Devaux J. Influence of homogenization and drying on the thermal stability of microfibrillated cellulose. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2009.11.020] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
30
|
DeRoover A, Krafft MP, Deby-Dupont G, Riess J, Jacquet N, Lamy M, Meurisse M, D'Silva M. SEVENTY-TWO HOURS HYPOTHERMIC INTESTINAL PRESERVATION STUDY USING A NEW PERFLUOROCARBON EMULSION. ACTA ACUST UNITED AC 2009; 29:225-34. [PMID: 11358038 DOI: 10.1081/bio-100103046] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We investigated the effect of a perfluorocarbon emulsion (FC) added to the University of Wisconsin (UW) solution on hypothermic (4 degrees C, 12-72h) preservation of rat small bowel grafts. The FC was 90%w/v perfluorooctylbromide, 2%w/v egg yolk phospholipids and 1.4%w/v mixed fluorocarbon-hydrocarbon molecular dowels. Four groups were defined: [1] UW flush and UW storage; [2] UW flush and FC storage; [3] flush with FC diluted 2 times with UW (FU) and FU storage; [4] FU flush and storage in oxygenated FU. Preservation was estimated with a histological score based on villus epithelium adhesion, on villus sloughing and on crypt cell adhesion to the basal membrane. Antioxidant potential was estimated by measurement of total thiol functions (SH) and activities of glutathione-peroxidase (GSH-P), superoxide dismutase (SOD) and catalase. FC in flush improved preservation during the first 24h (p<0.01). Storage in FC appeared superior to UW for the first 24h (p<0.01). Oxygenation (100% O2) of the storage medium yielded superior results at 12h and 24h (p<0.01 and p<0.001 versus group [1] respectively). After 72h, SOD and catalase activities increased in groups [3] and [4], and SOD decreased in group [1] (p<0.05). SH progressively decreased in group [1] (p<0.05) and GSH-P increased at 24 and 48h in groups [3] and [4] (p<0.01). The increase of O2 in the perfusion flush or storage medium ameliorated the preservation status and protected the antioxidant potential of the small bowel.
Collapse
Affiliation(s)
- A DeRoover
- Department of Abdominal Surgery and Transplantation, University Hospital, Liège, Belgium
| | | | | | | | | | | | | | | |
Collapse
|
31
|
|
32
|
Gregoire E, Sorokine-Durm I, Bertho JM, Jacquet N, Delbos M, Demarquay C, Voisin P, Roy L. Follow-up of stable chromosomal aberrations in gamma-ray irradiated non-human primates. Int J Radiat Biol 2006; 82:493-502. [PMID: 16882621 DOI: 10.1080/09553000600840930] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE The purpose of this study was to examine a new approach to retrospective biological dosimetry, by using a long-term animal model to determine the stability of translocation frequency after in vivo irradiation. While the frequency of dicentrics is known to decrease over time, the persistence of more stable chromosomal aberrations such as translocations could be useful if their stability were definitively proved. MATERIALS AND METHODS Four monkeys (Macaca fascicularis) were exposed to two different doses of ionizing radiation: 2 Gy whole body irradiation for two and 4 Gy for two others. Blood samples were obtained at various times after irradiation. Both total and two-way translocations were detected by fluorescence in situ hybridization. Translocations were scored in stable cells, that is, those without dicentrics, rings or fragments. The course of translocation frequency was analysed at four time-points: one hour (H1), 2 months (M2), 10 months (M10) and 31 months (M31) after irradiation. RESULTS We observed two separate trends in translocation frequency: Total translocation frequency decreased slightly in animals irradiated with a dose of 2 Gy, while two-way translocation frequency was relatively stable in all irradiated animals. CONCLUSIONS We confirmed the long-term stability of translocations and found that it seems to depend on the type of the translocation recorded. Overall translocations were stable for up to 31 months regardless of dose, but two-way translocations were more stable than those that were non-reciprocal, especially in stable cells.
Collapse
Affiliation(s)
- E Gregoire
- Institut de Radioprotection et Sûreté Nucléaire, Direction de la radioprotection de l'homme, Service de radiobiologie et d'épidémiologie, Fontenay-aux-Roses cedex, France.
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Laurent S, Detry O, Detroz B, DeRoover A, Joris J, Honoré P, Louis E, Belaïche J, Jacquet N. Strictureplasty in Crohn's disease: short- and long-term follow-up. Acta Chir Belg 2002; 102:253-5. [PMID: 12244904 DOI: 10.1080/00015458.2002.11679307] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Strictureplasty for obstructive Crohn's disease is still controversial because lesions are left in place and the suture is performed on a diseased bowel. Many surgeons prefer to perform bowel resection, hoping for fewer complications and a lower recurrence rate. In this paper, the authors reports their strictureplasty experience. They performed a systematic retrospective review of the patients suffering from Crohn's disease who underwent strictureplasties during a 10-year period in the abdominal surgery department of the University Hospital of Liège Sart Tilman, and studied the short- and long-term clinical results of 68 strictureplasties performed in 18 patients. Median follow-up was 63 months (range 12 to 144). Mortality was 0% and septic morbidity was 11% (one wound abscess and one leakage). Among the 16 patients available for the latest follow-up, symptomatic stenotic recurrence had to be medically treated in hospital for 4 patients (25%) with a recurrence delay range of 19 to 49 months. Stenosis recurrence needed re-intervention in one patient 48 months after surgery: stenosis occurred at a distance from the corrected site. These results confirmed that strictureplasty is a safe and efficient procedure in selected patients undergoing surgery for obstructive Crohn's disease.
Collapse
Affiliation(s)
- S Laurent
- Dpt of Abdominal Surgery, CHU Sart Tilman B-35, Liège, Belgium
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Detry O, De Roover A, Honoré P, Delwaide J, Jacquet N, Meurisse M. Mycophenolate mofetil monotherapy in stable liver transplant recipients with progressive renal failure. Transplant Proc 2002; 34:782-3. [PMID: 12034182 DOI: 10.1016/s0041-1345(01)02911-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- O Detry
- Department of Transplantation, University of Liège, Liège, Belgium.
| | | | | | | | | | | |
Collapse
|
35
|
Affiliation(s)
- O Detry
- Department of Liver Surgery and Transplantation, University Hospital Sart Tilman B35, B-4000 Liège, Belgium.
| | | | | | | | | |
Collapse
|
36
|
Detry O, Honore P, DeRoover A, Trimeche M, Demoulin JC, Beaujean M, Moonen M, Godon JP, Boniver J, Jacquet N, Meurisse M. Reversal of oxalosis cardiomyopathy after combined liver and kidney transplantation. Transpl Int 2002. [DOI: 10.1111/j.1432-2277.2002.tb00098.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
37
|
Detry O, Honoré P, DeRoover A, Trimeche M, Demoulin JC, Beaujean M, Moonen M, Godon JP, Boniver J, Jacquet N, Meurisse M. Reversal of oxalosis cardiomyopathy after combined liver and kidney transplantation. Transpl Int 2002; 15:50-2. [PMID: 11875614 DOI: 10.1007/s00147-001-0364-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2000] [Revised: 05/07/2001] [Accepted: 06/06/2001] [Indexed: 11/28/2022]
Abstract
Few data have been published on the course of oxalosis cardiomyopathy after combined liver and kidney transplantation in hyperoxaluria patients with myocardial involvement. We report the case of a primary hyperoxaluria type 1 patient with renal failure who developed end-stage cardiomyopathy. Left venticulography showed severe diffuse hypokinesia and left ventricular ejection fraction was calculated at 12%. Endomyocardial biopsy demonstrated platelike calcium oxalate crystals within the myocardium and the connective tissue, and mild perivascular fibrosis. The patient was first considered for combined liver-heart-kidney transplantation, but as his cardiac function improved slightly with an intensive dialysis program, combined liver and kidney transplantation was performed. Normal cardiac function was demonstrated at 1-year follow-up, and comparative endomyocardial biopsy showed regression of the myocardial oxalate deposits. This case adds stronger clinical, hemodynamic, and histopathological evidence that severe oxalosis cardiomyopathy may be reversed after combined liver and kidney transplantation.
Collapse
Affiliation(s)
- Olivier Detry
- Department of Surgery and Transplantation, University Hospital of Liège, CHU Sart Tilman B35, 4000 Liège, Belgium.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Delbecque K, Detry O, Hayette MP, Jeukens T, Delvenne P, Hardy N, Delwaide J, Demonty J, Boverie J, Demol P, Hauwaert C, Honoré P, Boniver J, Jacquet N. A case of hepatic alveolar echinococcosis contracted in Belgium. Acta Gastroenterol Belg 2002; 65:55-60. [PMID: 12014318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
We report herein the case of a Belgian 76-year-old woman who developed a hepatic tumour suspected to be a breast cancer metastasis. Radiological imaging and guided biopsies were not contributive. The patient underwent an explorative laparoscopy with frozen sections that did not provide further diagnosis, and an open left bisegmentectomy was performed during the same anaesthesia. Histopathological examination of the hepatic mass showed Echinococcus multilocularis metacestodes, demonstrating alveolar echinococcosis. As our patient denied any travel in foreign countries and has undergone regular abdominal ultrasonographies since her mastectomy, it is highly likely that this alveolar echinococcosis had been contracted in Belgium. If some imported cases may be seldom managed in Belgium, to our knowledge, this case is the first occurrence of alveolar echinococcosis contracted in Belgium. This report, added to the demonstration of E. multilocaris infection of 50% of red foxes in Southern Belgium, and the potential infection of domestic cats and dogs, should attract attention of the medical community on the possible outbreak of endemic alveolar echinococcosis in Belgium, and on the related public health concerns.
Collapse
Affiliation(s)
- K Delbecque
- Department of Pathology, University Hospital of Liège, CHU Sart Tilman B35, B-4000 Liège, Belgium
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
De Roover A, Detry O, Honoré P, Delbecque K, de Leval L, Delwaide J, Joris J, Canivet JL, Damas P, Boniver J, Lamy M, Meurisse M, Jacquet N. [Alpha-1-antitrypsin deficiency. An indication for pediatric liver transplantation]. Rev Med Liege 2001; 56:753-8. [PMID: 11789388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Alpha-1-antitrypsin deficiency is the most common inborn error of metabolism leading to liver transplantation, and the second cause of liver transplantation in children after biliary atresia. The authors report the case of a 6-year-old girl, who was suffering from end-stage liver disease secondary to alpha-1-antitrypsin deficiency. She was successfully treated by whole liver transplantation, the hepatic graft coming from a 3-year-old donor. Three months later she went back to school. The authors discuss the pathogenesis and the natural history of this frequent cause of liver transplantation in children.
Collapse
Affiliation(s)
- A De Roover
- Service de Chirurgie Abdominale et Transplantation, Université de Liège
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Postal A, Detry O, Louis E, Hardy N, Belaïche J, Jacquet N. Ileo-caecal actinomycosis: report of a case simulating complicated inflammatory bowel disease. Acta Gastroenterol Belg 2001; 64:318-20. [PMID: 11887635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Abdominal actinomycosis is a rare infectious disease caused by Actinomyces israelii, a gram-positive anaerobic saprophyte germ that is a normal inhabitant of the upper intestinal tract in humans. Actinomyces israelii rarely cause abdominal infections or actinomycosis. Abdominal actinomysosis is characterised by fistulae and abscesses and may mimic cancer or inflammatory bowel disease. Abdominal actinomycosis is difficult to diagnose preoperatively, and often require surgical removal of the diseased tissue, allowing pathologists for giving the definitive diagnosis, revealed by characteristic "sulfur granules". The authors report herein the case of a 47-year-old man who presented with diarrhoea and abdominal pain. Abdominal computed tomography evoked complicated inflammatory bowel disease and surgical procedure was decided. Laparoscopic exploration did not provide further significant information, and laparotomy with diseased bowel resection was performed. Pathology demonstrated "sulfur granules" and allowed the diagnosis of abdominal actinomycosis. This case demonstrated that abdominal actinomycosis should be included in the differential diagnosis when computed tomography shows an infiltrative and inflammatory mass.
Collapse
Affiliation(s)
- A Postal
- Department of Abdominal Surgery, University Hospital of Liège, CHU Sart Tilman B35, B-4000 Liège, Belgium
| | | | | | | | | | | |
Collapse
|
41
|
De Roover A, Detry O, Hamoir E, Defechereux T, Beaujean MA, Bonnet P, Honoré P, Meurisse M, Jacquet N. [Update on pancreatic transplantation]. Rev Med Liege 2001; 56:557-62. [PMID: 11584440] [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: 02/21/2023]
Abstract
Pancreas transplantation significantly improves the quality of life as well as the survival of the diabetic patient. It is also associated with stabilization and reversal of secondary diabetic complications. Improvements in organ preservation, surgical techniques and immunosuppression have achieved one-year graft survival of more than 90% for combined kidney-pancreas transplant and 80% for isolated pancreas transplantation. Recipient evaluation must weigh the benefits of the procedure with the risk associated with surgery and chronic immunosuppression. Combined kidney-pancreas transplantation appears today as the best treatment for the diabetic patient with end stage renal disease. Isolated pancreas transplantation is reserved to non-uremic patients with severe diabetic complications or with brittle glycaemic control and severe impairment of quality of life.
Collapse
|
42
|
Bertho JM, Demarquay C, Frick J, Joubert C, Arenales S, Jacquet N, Sorokine-Durm I, Chau Q, Lopez M, Aigueperse J, Gorin NC, Gourmelon P. Level of Flt3-ligand in plasma: a possible new bio-indicator for radiation-induced aplasia. Int J Radiat Biol 2001; 77:703-12. [PMID: 11403710 DOI: 10.1080/09553000110043711] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
PURPOSE To follow plasma Flt3-ligand (FL) concentrations in irradiated animals in order to evaluate it as an indicator of bone marrow damage for the management of accidental radiation-induced aplasia. MATERIALS AND METHODS Non-human primates were irradiated at doses ranging from 2 to 8 Gy, using whole- or partial-body irradiation. Plasma FL concentrations and blood cell counts were determined daily. RESULTS FL concentrations increased as early as day 2 after irradiation, whatever the irradiation dose. Increase in plasma FL concentration on day 5 post-irradiation was correlated with radiation dose and with the severity of radiation-induced aplasia. During the course of aplasia, FL concentrations in plasma were inversely correlated with neutrophil counts. A peak in FL concentration appeared before the neutrophil nadir, and the subsequent decrease in FL concentration was correlated with the recovery of blood-cell populations. CONCLUSIONS Monitoring plasma FL concentration can be used as an indicator of radiation-induced marrow aplasia, and this may be of use in accidental irradiation situations.
Collapse
Affiliation(s)
- J M Bertho
- Institut de Protection et de Sûreté Nucléaire, Département de Protection de la Santé de L'homme et de Dosimétrie, Fontenay-aux-Roses Cedex, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Amaral A, Colas-Linhart N, Stabin M, Petiet A, Guiraud-Vitaux F, Jacquet N. In vitro irradiation of blood with 99mTc: evaluation of dose and chromosome aberrations in irradiated lymphocytes. Cell Mol Biol (Noisy-le-grand) 2001; 47:545-8. [PMID: 11441962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
The use of ionizing radiation for diagnostic or therapeutic purposes in medicine represents the principal source of artificial radiation to humans. Calculation of radiation dose is essential to the analysis of risks (biological effects) and benefits in any application, including nuclear medicine. The dose assessment in many cases is not necessarily straightforward. Many radiopharmaceuticals are labelled with radionuclides that undergo not only gamma-emission but also emission of Auger and internal conversion electrons. A typical example is technetium-99m (99mTc), which is used in more than 80% of nuclear medicine applications. In this work, in vitro studies have been carried out to evaluate the dose delivered to lymphocytes by human serum albumin microspheres (HSAM) labelled with 99mTc. Experiments were performed in order to score unstable chromosomal aberrations induced by 99mTc-HSAM, using conventional cytogenetic techniques. Henceforth, the relationship between activities introduced into blood samples and induced chromosomal aberrations were evaluated. To assess the dose absorbed in lymphocytes, electron and photon transport was performed in a simple model representing the system used for irradiating the cells using the MCNP Monte Carlo code. In this report, analysis of dose-effect curve demonstrates a linear quadratic response for unstable chromosome aberrations.
Collapse
Affiliation(s)
- A Amaral
- Departamento de Energia Nuclear, Universidade Federal de Pemambuco, Recife, Brazil.
| | | | | | | | | | | |
Collapse
|
44
|
Servais A, Pestieau SR, Detry O, Honoré P, Belaïche J, Boniver J, Jacquet N. Autoimmune pancreatitis mimicking cancer of the head of pancreas: report of two cases. Acta Gastroenterol Belg 2001; 64:227-30. [PMID: 11475142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Autoimmune pancreatitis has been characterised in 1995, but only a few cases have been published since then, most of them from Japan. This report describes the cases of two Belgian male patients who presented with isolated obstructive jaundice. Radiological imaging studies were highly suggestive of carcinoma of the head of pancreas and both patients underwent uneventful cephalic pancreaticoduodenectomy with portal vein resection. Pathological analysis of the removed tissues suggested an autoimmune process in both cases. Both patients had hyper-gammaglobulinemia and antinuclear antibodies, but failed to show evidence of any other autoimmune disease or cause of chronic pancreatitis. In both cases final diagnosis was autoimmune pancreatitis. Preoperative clinical suspicion of this diagnosis is mandatory and may avoid unnecessary surgery in future cases.
Collapse
Affiliation(s)
- A Servais
- Department of Pathology, University Hospital of Liège, Belgium
| | | | | | | | | | | | | |
Collapse
|
45
|
Abstract
Retransplantation is common after liver transplantation (LT). However, in the present era of organ shortages, every attempt to save the liver graft should be performed before considering retransplantation. We report our experience with right hepatic lobectomy (RHL) for liver graft salvage. In a retrospective series of 180 adult LTs, 4 patients underwent RHL (Couinaud's segments V, VI, VII, VIII) in the post-LT period. In all cases, the procedure was performed without Pringle's maneuver or mobilization of the left liver lobe to preserve its vascularization. Three liver graft recipients developed intrahepatic biliary strictures, mainly localized to the right lobe of the graft, and RHL was performed 14, 75, and 78 months after LT. These patients were alive at last follow-up without further episodes of cholangitis or retransplantation (mean follow-up, 38 months). The fourth patient developed early post-LT right liver necrosis with a functioning hepatic artery and underwent right lobectomy 48 hours after LT. He later developed cholangitis secondary to late hepatic artery thrombosis, requiring retransplantation after 18 months. We conclude that RHL can be considered a graft-saving option in selected liver transplant recipients with localized biliary strictures, with excellent patient and graft survival.
Collapse
Affiliation(s)
- P Honoré
- Department of Liver Surgery and Transplantation, University of Liège, University Hospital Sart Tilman, B-4000 Liège, Belgium
| | | | | | | | | | | | | |
Collapse
|
46
|
Kolh P, Honore P, Degauque C, Gielen J, Gerard P, Jacquet N. Early stage results after oesophageal resection for malignancy - colon interposition vs. gastric pull-up. Eur J Cardiothorac Surg 2000; 18:293-300. [PMID: 10973538 DOI: 10.1016/s1010-7940(00)00524-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVE The aims of our study were to determine if using the colon as a digestive transplant after oesophagectomy for cancer was associated with increased postoperative complications, and to assess the impact of preoperative radiochemotherapy on postoperative hospital outcome. METHODS From January 1990 to December 1998, 130 patients underwent oesophageal resection for malignancy. There were 103 males and 27 females (age: 61.3+/-11.5 years). Indications were squamous cell carcinoma in 69 patients and adenocarcinoma in 61. Preoperatively 30 patients (eight in stage IIB, 18 in stage III, and four in stage IV) received radiochemotherapy. There were 84 subtotal oesophagectomies, with anastomosis in the neck in 44 patients and at the thoracic inlet in 40, and 46 distal oesophageal resections. Digestive continuity was restored with the stomach in 92 patients (age: 63.4+/-10.2 years) and the colon in 38 (age: 52.3+/-12.8 years). With the exception of age (P<0.0001), there was no significant preoperative difference between gastric and colonic groups. RESULTS Hospital mortality was 8.5% (11 patients), decreasing from 18.5% (before 1993) to 3.8% (since 1993). One patient (2.5%) died in the colonic graft group and ten (11%) in the gastric pull-up group (P=0.17). Postoperative complications occurred in 40 patients (31%), respectively, in ten (26%) and 30 (33%) patients after colonic and gastric transplants (P=0.48), and were pulmonary insufficiency or infection in 29 patients, anastomotic fistula in six, myocardial infarction in five, recurrent nerve palsy in four, renal insufficiency in three, and cerebrovascular accident in one. All fistulas occurred in the gastric pull-up group. The incidence of postoperative pulmonary complications was 70% (21/30 patients) in the subgroup who received preoperative radiochemotherapy, as compared to 11% (5/44 patients) in the subgroup of comparable staging, but without preoperative treatment (P<0.001). CONCLUSIONS Colonic grafts are not associated with increased postoperative mortality or complications. Our results suggest that preoperative neoadjuvant treatment significantly increases postoperative pulmonary complications.
Collapse
Affiliation(s)
- P Kolh
- Department of Cardio-thoracic Surgery, University Hospital of Liège, B35 Sart Tilman, 4000, Liège, Belgium.
| | | | | | | | | | | |
Collapse
|
47
|
Detry O, Honoré P, Hans MF, Delbouille MH, Jacquet N, Meurisse M. Organ donors with primary central nervous system tumor. Transplantation 2000; 70:244-8; discussion 251-2. [PMID: 10919616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Patients with primary central nervous system (CNS) tumor have been accepted for organ donation because these tumors very rarely spread outside the CNS. However several case reports of CNS tumor transferral with organ transplantation recently challenged this attitude. Some risk factors for extraneural spread of CNS tumors have been determined, but the absence of risk factors does not exclude the possibility of metastases. To our knowledge, 13 cases of CNS tumor transferral with organ transplantation (one heart, three livers, eight kidneys, one kidney/pancreas) have been reported in the literature. Even if no prospective evaluation of the CNS tumor transmission risk with transplantation has been undergone, this risk may be estimated between a little more than 0% and 3% from retrospective series. The authors consider that patients with CNS tumor should be accepted as donors as long as the risk of dying on the waiting lists is significantly higher than the tumor transferral risk. Therefore the authors would have no restriction for transplanting organs from donors with benign or low-grade CNS tumor. For high-grade tumors, the authors would consider these donors as "marginal donors," and balance the risk of tumor transmission with the medical condition of the recipient.
Collapse
Affiliation(s)
- O Detry
- Department of Surgery and Transplantation, University Hospital of Liège, CHU Sart-Tilman B35, Belgium.
| | | | | | | | | | | |
Collapse
|
48
|
Leduc FJ, Pestieau SR, Detry O, Hamoir E, Honoré P, Trotteur G, Jacquet N. Acute mesenteric ischaemia: minimal invasive management by combined laparoscopy and percutaneous transluminal angioplasty. Eur J Surg 2000; 166:345-7. [PMID: 10817335 DOI: 10.1080/110241500750009221] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- F J Leduc
- Department of Abdominal Surgery, University Hospital of Liège, Belgium
| | | | | | | | | | | | | |
Collapse
|
49
|
Honoré P, Jacquet N. [Curative surgical treatment of pancreatic carcinoma]. Rev Med Liege 2000; 55:131-4. [PMID: 10822999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Surgery remains the unique curative treatment of the pancreatic carcinoma. The operative risk is actually low. The indication and limitations of surgical resection are discussed.
Collapse
Affiliation(s)
- P Honoré
- Service de Chirurgie abdominale, Université de Liège
| | | |
Collapse
|
50
|
Affiliation(s)
- O Detry
- Department of Transplantation, CHU Sart-Tilman B35, Liège, Belgium
| | | | | | | |
Collapse
|