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Aggarwal R, Saini D, Mitra R, Sonkar SK, Sonker AK, Westman G. From Bulk Molybdenum Disulfide (MoS 2) to Suspensions of Exfoliated MoS 2 in an Aqueous Medium and Their Applications. Langmuir 2024; 40:9855-9872. [PMID: 38687994 DOI: 10.1021/acs.langmuir.3c03116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Two-dimensional (2D) layered materials like graphene, transition-metal dichalcogenides (TMDs), boron nitrides, etc., exhibit unique and fascinating properties, such as high surface-to-volume ratio, inherent mechanical flexibility and robustness, tunable bandgap, and high carrier mobility, which makes them an apt candidate for flexible electronics with low consumption of power. Because of these properties, they are in tremendous demand for advancement in energy, environmental, and biomedical sectors developed through various technologies. The production and scalability of these materials must be sustainable and ecofriendly to utilize these unique properties in the real world. Here, in this current review, we review molybdenum disulfide (MoS2 nanosheets) in detail, focusing on exfoliated MoS2 in water and the applicability of aqueous MoS2 suspensions in various fields. The exfoliation of MoS2 results in the formation of single or few-layered MoS2. Therefore, this Review focuses on the few layers of exfoliated MoS2 that have the additional properties of 2D layered materials and higher excellent compatibility for integration than existing conventional Si tools. Hence, a few layers of exfoliated MoS2 are widely explored in biosensing, gas sensing, catalysis, photodetectors, energy storage devices, a light-emitting diode (LED), adsorption, etc. This review covers the numerous methodologies to exfoliate MoS2, focusing on the various published methodologies to obtain nanosheets of MoS2 from water solutions and their use.
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Affiliation(s)
- Ruchi Aggarwal
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur 302017, India
| | - Deepika Saini
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur 302017, India
| | - Richa Mitra
- Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
- Low Temperature Laboratory, Department of Applied Physics, Aalto University, Espoo 02150, Finland
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur 302017, India
| | - Amit Kumar Sonker
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, 41296, Sweden
- Wallenberg Wood Science Centre (WWSC), Chalmers University of Technology, Gothenburg, 41296, Sweden
- BA5409 cellulose films and coatings, VTT Technical Research Center of Finland, Tietotie 4E, Espoo 02150, Finland
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, 41296, Sweden
- Wallenberg Wood Science Centre (WWSC), Chalmers University of Technology, Gothenburg, 41296, Sweden
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Janewithayapun R, Hedenqvist MS, Cousin F, Idström A, Evenäs L, Lopez-Sanchez P, Westman G, Larsson A, Ström A. Nanostructures of etherified arabinoxylans and the effect of arabinose content on material properties. Carbohydr Polym 2024; 331:121846. [PMID: 38388051 DOI: 10.1016/j.carbpol.2024.121846] [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: 11/16/2023] [Revised: 01/01/2024] [Accepted: 01/18/2024] [Indexed: 02/24/2024]
Abstract
To further our understanding of a thermoplastic arabinoxylan (AX) material obtained through an oxidation-reduction-etherification pathway, the role of the initial arabinose:xylose ratio on the material properties was investigated. Compression molded films with one molar substitution of butyl glycidyl ether (BGE) showed markedly different tensile behaviors. Films made from low arabinose AX were less ductile, while those made from high arabinose AX exhibited elastomer-like behaviors. X-ray scattering confirmed the presence of nanostructure formation resulting in nano-domains rich in either AX or BGE, from side chain grafting. The scattering data showed variations in the presence of ordered structures, nano-domain sizes and their temperature response between AX with different arabinose contents. In dynamic mechanical testing, three transitions were observed at approximately -90 °C, -50 °C and 80 °C, with a correlation between samples with more structured nano-domains and those with higher onset transition temperatures and lower storage modulus decrease. The mechanical properties of the final thermoplastic AX material can therefore be tuned by controlling the composition of the starting material.
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Affiliation(s)
- Ratchawit Janewithayapun
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; FibRe Center for Lignocellulose-based Thermoplastics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Mikael S Hedenqvist
- FibRe Center for Lignocellulose-based Thermoplastics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; Department of Fibre and Polymer Technology, School of Engineering Science in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden; Wallenberg Wood Science Center, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
| | - Fabrice Cousin
- Laboratoire Léon Brillouin, Université Paris-Saclay, UMR 12, CEA-CNRS, 91191 Gif Sur Yvette, France
| | - Alexander Idström
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Lars Evenäs
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; FibRe Center for Lignocellulose-based Thermoplastics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; Wallenberg Wood Science Center, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Patricia Lopez-Sanchez
- Department of Analytical Chemistry, Nutrition, and Food Science. Facultad de Ciencias, Instituto de Materiales (IMATUS), Universidade de Santiago de Compostela, Campus Terra, 27002 Lugo, Spain
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; FibRe Center for Lignocellulose-based Thermoplastics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; Wallenberg Wood Science Center, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Anette Larsson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; FibRe Center for Lignocellulose-based Thermoplastics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; Wallenberg Wood Science Center, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Anna Ström
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; FibRe Center for Lignocellulose-based Thermoplastics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
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Sultana N, Edlund U, Guria C, Westman G. Kinetics of Periodate-Mediated Oxidation of Cellulose. Polymers (Basel) 2024; 16:381. [PMID: 38337270 DOI: 10.3390/polym16030381] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
The oxidation of cellulose to dialdehyde cellulose (DAC) is a process that has received increased interest during recent years. Herein, kinetic modeling of the reaction with sodium periodate as an oxidizing agent was performed to quantify rate-limiting steps and overall kinetics of the cellulose oxidation reaction. Considering a pseudo-first-order reaction, a general rate expression was derived to elucidate the impact of pH, periodate concentration, and temperature on the oxidation of cellulose and concurrent formation of cellulose degradation products. Experimental concentration profiles were utilized to determine the rate constants for the formation of DAC (k1), degradation constant of cellulose (k2), and degradation of DAC (k3), confirming that the oxidation follows a pseudo-first-order reaction. Notably, the increase in temperature has a more pronounced effect on k1 compared to the influence of IO4- concentration. In contrast, k2 and k3 display minimal changes in response to IO4- concentration but increase significantly with increasing temperature. The kinetic model developed may help with understanding the rate-limiting steps and overall kinetics of the cellulose oxidation reaction, providing valuable information for optimizing the process toward a faster reaction with higher yield of the target product.
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Affiliation(s)
- Nazmun Sultana
- Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
- Organic Chemistry, Chemistry, and Chemical Engineering, Chalmers University of Technology, Kemigården 4, SE-412 96 Gothenburg, Sweden
- FibRe-Centre for Lignocellulose-Based Thermoplastics, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Ulrica Edlund
- Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
- FibRe-Centre for Lignocellulose-Based Thermoplastics, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Chandan Guria
- Department of Petroleum Engineering, Indian Institute of Technology (IIT-Indian School of Mines), Dhanbad 826 004, India
| | - Gunnar Westman
- Organic Chemistry, Chemistry, and Chemical Engineering, Chalmers University of Technology, Kemigården 4, SE-412 96 Gothenburg, Sweden
- FibRe-Centre for Lignocellulose-Based Thermoplastics, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
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Wojno S, Sonker AK, Feldhusen J, Westman G, Kádár R. Isotropic Gels of Cellulose Nanocrystals Grafted with Dialkyl Groups: Influence of Surface Group Topology from Nonlinear Oscillatory Shear. Langmuir 2023; 39:6433-6446. [PMID: 37096902 PMCID: PMC10173451 DOI: 10.1021/acs.langmuir.3c00210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Attractive (non-self-assembling) aqueous cellulose nanocrystal (CNC) suspensions were topologically tailored into isotropic gels through the surface grafting of dialkyl groups. We thus focus on the influence of CNC concentration, including for pristine CNC, surface linker branching, branching degree, and the influence of side group size and branch-on-branch surface-grafted groups. The resulting mobility and strength of interaction in particle-particle interaction mediated by the surface groups was investigated from a rheological point of view. The emphasis is on nonlinear material parameters from Fourier-transform rheology and stress decomposition analysis. The results show that nonlinear material parameters are more sensitive than linear viscoelastic parameters to the onset of weakly interconnected networks in pristine CNC isotropic suspensions. All surface-modified CNC suspensions resulted in isotropic gels. The nonlinear material parameters were found to be broadly sensitive to CNC concentration, branching, degree of branching and surface-grafted linkers' length. However, the length of the grafted chains and the degree of branching were the primary factors influencing the nonlinear material response. Furthermore, the results showed evidence of two strain amplitude ranges with distinct nonlinear signatures that could be attributed to the disruption of weak network connection points and to distortions of more dense (aggregate) network regions, respectively.
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Affiliation(s)
- Sylwia Wojno
- Department of Industrial and Materials Science, Division of Engineering Materials, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
- Wallenberg Wood Science Center (WWSC), Chalmers, SE-412 96 Gothenburg, Sweden
| | - Amit Kumar Sonker
- Department of Chemistry and Chemical Engineering, Division of Chemistry and Biochemistry, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
- Wallenberg Wood Science Center (WWSC), Chalmers, SE-412 96 Gothenburg, Sweden
| | - Jelka Feldhusen
- Department of Chemistry and Chemical Engineering, Division of Chemistry and Biochemistry, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering, Division of Chemistry and Biochemistry, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
- Wallenberg Wood Science Center (WWSC), Chalmers, SE-412 96 Gothenburg, Sweden
| | - Roland Kádár
- Department of Industrial and Materials Science, Division of Engineering Materials, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
- Wallenberg Wood Science Center (WWSC), Chalmers, SE-412 96 Gothenburg, Sweden
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Aggarwal R, Garg AK, Saini D, Sonkar SK, Sonker AK, Westman G. Cellulose Nanocrystals Derived from Microcrystalline Cellulose for Selective Removal of Janus Green Azo Dye. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03365] [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: 12/27/2022]
Affiliation(s)
- Ruchi Aggarwal
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur302017, India
| | - Anjali Kumari Garg
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur302017, India
| | - Deepika Saini
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur302017, India
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur302017, India
| | - Amit Kumar Sonker
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg41296, Sweden
- Wallenberg Wood Science Center (WWSC), Chalmers University of Technology, Gothenburg41296, Sweden
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg41296, Sweden
- Wallenberg Wood Science Center (WWSC), Chalmers University of Technology, Gothenburg41296, Sweden
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Nilsson R, Olsson M, Westman G, Matic A, Larsson A. Screening of hydrogen bonds in modified cellulose acetates with alkyl chain substitutions. Carbohydr Polym 2022; 285:119188. [DOI: 10.1016/j.carbpol.2022.119188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/23/2022] [Accepted: 01/24/2022] [Indexed: 11/25/2022]
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Deralia PK, Sonker AK, Lund A, Larsson A, Ström A, Westman G. Side chains affect the melt processing and stretchability of arabinoxylan biomass-based thermoplastic films. Chemosphere 2022; 294:133618. [PMID: 35066072 DOI: 10.1016/j.chemosphere.2022.133618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 01/03/2022] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Hydrophobization of hemicellulose causes melt processing and makes them stretchable thermoplastics. Understanding how native and/or appended side chains in various hemicelluloses after chemical modification affect melt processing and material properties can help in the development of products for film packaging and substrates for stretchable electronics applications. Herein, we describe a one-step and two-step strategy for the fabrication of flexible and stretchable thermoplastics prepared by compression molding of two structurally different arabinoxylans (AX). For one-step synthesis, the n-butyl glycidyl ether epoxide ring was opened to the hydroxyl group, resulting in the introduction of alkoxide side chains. The first step in the two-step synthesis was periodate oxidation. Because the melt processability for AXs having low arabinose to xylose ratio (araf/xylp<0.5) have been limited, two structurally distinct AXs extracted from wheat bran (AXWB, araf/xylp = 3/4) and barley husk (AXBH, araf/xylp = 1/4) were used to investigate the effect of araf/xylp and hydrophobization on the melt processability and properties of the final material. Melt compression processability was achieved in AXBH derived samples. DSC and DMA confirmed that the thermoplastics derived from AXWB and AXBH had dual and single glass transition (Tg) characteristics, respectively, but the thermoplastics derived from AXBH had lower stretchability (maximum 160%) compared to the AXWB samples (maximum 300%). Higher araf/xylp values, and thus longer alkoxide side chains in AXWB-derived thermoplastics, explain the stretchability differences.
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Affiliation(s)
- Parveen Kumar Deralia
- Chemistry and Biochemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-41296, Gothenburg, Sweden.
| | - Amit Kumar Sonker
- Chemistry and Biochemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-41296, Gothenburg, Sweden
| | - Anja Lund
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-41296, Gothenburg, Sweden
| | - Anette Larsson
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-41296, Gothenburg, Sweden
| | - Anna Ström
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-41296, Gothenburg, Sweden
| | - Gunnar Westman
- Chemistry and Biochemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-41296, Gothenburg, Sweden.
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Aggarwal R, Saini D, Sonkar SK, Sonker AK, Westman G. Sunlight promoted removal of toxic hexavalent chromium by cellulose derived photoactive carbon dots. Chemosphere 2022; 287:132287. [PMID: 34563775 DOI: 10.1016/j.chemosphere.2021.132287] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 09/13/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
A scalable synthetic procedure for fabricating photoactive carbon dots (CD) from microcrystalline cellulose (MCC) is presented. The MCC was transformed into a photoactive nanosized CD by a one-step acid-assisted thermal-carbonization (~90 °C for 30 min). The efficiency of the obtained CD was determined by photo-removal of toxic hexavalent chromium (Cr(VI)) ions from wastewater. CD obtained from cellulose completely removed 20 ppm of Cr(VI) wastewater within ∼120 min under sunlight illumination. No Cr(VI) removal was observed in dark conditions and with control cellulose material as reference samples. The Cr(VI) removal follows pseudo-first-order kinetics along with a half-life of ∼26 min. Furthermore, the Cr(VI) removal from wastewater was supported via cyclic voltammetry analysis. Using a low-cost, naturally available cellulose material and sulfuric acid, the world's most-used chemical, creates techno-economic prerequisites for a scalable process of photoactive carbon dots.
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Affiliation(s)
- Ruchi Aggarwal
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur, 302017, India
| | - Deepika Saini
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur, 302017, India
| | - Sumit Kumar Sonkar
- Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Jaipur, 302017, India.
| | - Amit Kumar Sonker
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, 41296, Sweden; Wallenberg Wood Science Center (WWSC), Chalmers University of Technology, Gothenburg, 41296, Sweden.
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, 41296, Sweden; Wallenberg Wood Science Center (WWSC), Chalmers University of Technology, Gothenburg, 41296, Sweden.
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Deralia PK, du Poset AM, Lund A, Larsson A, Ström A, Westman G. Hydrophobization of arabinoxylan with n-butyl glycidyl ether yields stretchable thermoplastic materials. Int J Biol Macromol 2021; 188:491-500. [PMID: 34389389 DOI: 10.1016/j.ijbiomac.2021.08.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/14/2021] [Accepted: 08/05/2021] [Indexed: 12/24/2022]
Abstract
Hemicelluloses are regarded as one of the first candidates for the development of value-added materials due to their renewability, abundance, and functionality. However, because most hemicelluloses are brittle, they can only be processed as a solution and cannot be processed using industrial melt-based polymer processing techniques. In this study, arabinoxylan (AX) was hydrophobized by incorporating butyl glycidyl ether (BuGE) into the hydroxyl groups through the opening of the BuGE epoxide ring, yielding alkoxy alcohols with terminal ethers. The formed BuGE derivatives were melt processable and can be manufactured into stretchable thermoplastic films through compression molding, which has never been done before with hemicellulose modified in a single step. The structural and thermomechanical properties of the one-step synthesis approach were compared to those of a two-step synthesis with a pre-activation step to demonstrate its robustness. The strain at break for the one-step synthesized AX thermoplastic with 3 mol of BuGE is ≈200%. These findings suggest that thermoplastic polymers can be composited with hemicelluloses or that thermoplastic polymers made entirely of hemicelluloses can be designed as packaging and stretchable electronics supports.
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Affiliation(s)
- Parveen Kumar Deralia
- Chemistry and Biochemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-41296 Gothenburg, Sweden.
| | - Aline Maire du Poset
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE- Gothenburg, Sweden
| | - Anja Lund
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE- Gothenburg, Sweden
| | - Anette Larsson
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE- Gothenburg, Sweden
| | - Anna Ström
- Applied Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE- Gothenburg, Sweden
| | - Gunnar Westman
- Chemistry and Biochemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-41296 Gothenburg, Sweden.
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Deralia PK, du Poset AM, Lund A, Larsson A, Ström A, Westman G. Oxidation Level and Glycidyl Ether Structure Determine Thermal Processability and Thermomechanical Properties of Arabinoxylan-Derived Thermoplastics. ACS Appl Bio Mater 2021; 4:3133-3144. [DOI: 10.1021/acsabm.0c01550] [Citation(s) in RCA: 2] [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: 11/30/2022]
Affiliation(s)
- Parveen Kumar Deralia
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
| | - Aline Maire du Poset
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
| | - Anja Lund
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
| | - Anette Larsson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
| | - Anna Ström
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
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Wahlström N, Nylander F, Malmhäll-Bah E, Sjövold K, Edlund U, Westman G, Albers E. Composition and structure of cell wall ulvans recovered from Ulva spp. along the Swedish west coast. Carbohydr Polym 2020; 233:115852. [DOI: 10.1016/j.carbpol.2020.115852] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/20/2019] [Accepted: 01/08/2020] [Indexed: 12/14/2022]
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Chistov AA, Orlov AA, Streshnev PP, Slesarchuk NA, Aparin IO, Rathi B, Brylev VA, Kutyakov SV, Mikhura IV, Ustinov AV, Westman G, Palyulin VA, Jain N, Osolodkin DI, Kozlovskaya LI, Korshun VA. Compounds based on 5-(perylen-3-ylethynyl)uracil scaffold: High activity against tick-borne encephalitis virus and non-specific activity against enterovirus A. Eur J Med Chem 2019; 171:93-103. [PMID: 30909022 DOI: 10.1016/j.ejmech.2019.03.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 09/14/2018] [Revised: 02/17/2019] [Accepted: 03/12/2019] [Indexed: 12/26/2022]
Abstract
Rigid amphipathic fusion inhibitors (RAFIs) are potent antivirals based on a perylene core linked with a nucleoside moiety. Sugar-free analogues of RAFIs, 5-(perylen-3-ylethynyl)uracil-1-acetic acid 1 and its amides 2, were synthesized using combined protection group strategy. Compounds 1 and 2 appeared to have low toxicity on porcine embryo kidney (PEK) or rhabdomiosarcoma (RD) cells together with remarkable activity against enveloped tick-borne encephalitis virus (TBEV): EC50 values vary from 0.077 μM to subnanomolar range. Surprisingly, 3-pivaloyloxymethyl (Pom) protected precursors 7 and 8 showed even more pronounced activity. All the compounds showed no activity against several non-enveloped enteroviruses, except 4-hydroxybutylamides 2d,g, which inhibited the reproduction of enterovirus A71 with EC50 50-100 μM, with a non-specific mode of action. The results suggest that the carbohydrate moiety of RAFI nucleosides does not play a crucial role in their antiviral action, and biological activity of the 5-(perylen-3-ylethynyl)uracil scaffold can be effectively modulated by substituents in positions 1 and 3. The high antiviral activity of these new compounds, coupled with low toxicity advocate their potential role in antiviral therapy.
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Affiliation(s)
- Alexey A Chistov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Alexey A Orlov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia; FSBSI "Chumakov FSC R&D IBP RAS", 8 bd 1 Poselok Instituta Poliomielita, Poselenie Moskovsky, Moscow 108819, Russia; Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1 bd 3, Moscow 119992, Russia
| | - Philipp P Streshnev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Nikita A Slesarchuk
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Ilya O Aparin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia; Skolkovo Institute of Science and Technology, Skolkovo, Moscow 143026, Russia
| | - Brijesh Rathi
- Department of Chemistry, Laboratory for Translational Chemistry and Drug Discovery, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
| | - Vladimir A Brylev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia; Biotech Innovations Ltd, Leninskie gory 1 bd 75, Moscow 119992, Russia
| | - Sergey V Kutyakov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Irina V Mikhura
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Alexey V Ustinov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Gunnar Westman
- Chalmers University of Technology, SE-412 96, Gothenburg, Sweden
| | - Vladimir A Palyulin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1 bd 3, Moscow 119992, Russia
| | - Nidhi Jain
- Department of Chemistry, Indian Institute of Technology, Delhi, India
| | - Dmitry I Osolodkin
- FSBSI "Chumakov FSC R&D IBP RAS", 8 bd 1 Poselok Instituta Poliomielita, Poselenie Moskovsky, Moscow 108819, Russia; Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1 bd 3, Moscow 119992, Russia; Sechenov First Moscow State Medical University, Moscow 119991, Russia
| | - Liubov I Kozlovskaya
- FSBSI "Chumakov FSC R&D IBP RAS", 8 bd 1 Poselok Instituta Poliomielita, Poselenie Moskovsky, Moscow 108819, Russia; Sechenov First Moscow State Medical University, Moscow 119991, Russia.
| | - Vladimir A Korshun
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia.
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Josipovic M, Persson GF, Dueck J, Peter Bangsgaard J, Westman G, Specht L, Aznar MC. Corrigendum to "Geometric uncertainties in voluntary deep inspiration breath hold radiotherapy for locally advanced lung cancer" [Radiother. Oncol. 118 (2016) 510-514]. Radiother Oncol 2019; 133:230. [PMID: 30773227 DOI: 10.1016/j.radonc.2019.01.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 01/21/2019] [Indexed: 11/20/2022]
Affiliation(s)
- Mirjana Josipovic
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark.
| | - Gitte F Persson
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark
| | - Jenny Dueck
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark; Niels Bohr Institute, Faculty of Science, University of Copenhagen, Denmark; Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Jens Peter Bangsgaard
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark
| | - Gunnar Westman
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark
| | - Lena Specht
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark; Faculty of Medical Sciences, University of Copenhagen, Denmark
| | - Marianne C Aznar
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark; Niels Bohr Institute, Faculty of Science, University of Copenhagen, Denmark; Faculty of Medical Sciences, University of Copenhagen, Denmark
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Nylander F, Svensson O, Josefson M, Larsson A, Westman G. New features of arabinoxylan ethers revealed by using multivariate analysis. Carbohydr Polym 2019; 204:255-261. [DOI: 10.1016/j.carbpol.2018.09.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 09/18/2018] [Accepted: 09/23/2018] [Indexed: 11/27/2022]
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Börjesson M, Larsson A, Westman G, Ström A. Periodate oxidation of xylan-based hemicelluloses and its effect on their thermal properties. Carbohydr Polym 2018; 202:280-287. [DOI: 10.1016/j.carbpol.2018.08.110] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/02/2018] [Accepted: 08/25/2018] [Indexed: 01/23/2023]
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van Diessen J, De Ruysscher D, Sonke JJ, Damen E, Sikorska K, Reymen B, van Elmpt W, Westman G, Fredberg Persson G, Dieleman E, Bjorkestrand H, Faivre-Finn C, Belderbos J. The acute and late toxicity results of a randomized phase II dose-escalation trial in non-small cell lung cancer (PET-boost trial). Radiother Oncol 2018; 131:166-173. [PMID: 30327236 DOI: 10.1016/j.radonc.2018.09.019] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 09/24/2018] [Accepted: 09/25/2018] [Indexed: 12/25/2022]
Abstract
BACKGROUND AND PURPOSE The PET-boost randomized phase II trial (NCT01024829) investigated dose-escalation to the entire primary tumour or redistributed to regions of high pre-treatment FDG-uptake in inoperable non-small cell lung cancer (NSCLC) patients. We present a toxicity analysis of the 107 patients randomized in the study. MATERIALS AND METHODS Patients with stage II-III NSCLC were treated with an isotoxic integrated boost of ≥72 Gy in 24 fractions, with/without chemotherapy and strict dose limits. Toxicity was scored until death according to the CTCAEv3.0. RESULTS 77 (72%) patients were treated with concurrent chemoradiotherapy. Acute and late ≥G3 occurred in 41% and 25%. For concurrent (C) and sequential or radiotherapy alone (S), the most common acute ≥G3 toxicities were: dysphagia in 14.3% (C) and 3.3% (S), dyspnoea in 2.6% (C) and 6.7% (S), pneumonitis in 0% (C) and 6.7% (S), cardiac toxicity in 6.5% (C) and 3.3% (S). Seventeen patients died of which in 13 patients a possible relation to treatment could not be excluded. In 10 of these 13 patients progressive disease was scored. Fatal pulmonary haemorrhages and oesophageal fistulae were observed in 9 patients. CONCLUSION Personalized dose-escalation in inoperable NSCLC patients results in higher acute and late toxicity compared to conventional chemoradiotherapy. The toxicity, however, was within the boundaries of the pre-defined stopping rules.
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Affiliation(s)
- Judi van Diessen
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Dirk De Ruysscher
- Department of Radiation Oncology (MAASTRO Clinic), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre, The Netherlands
| | - Jan-Jakob Sonke
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Eugène Damen
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Karolina Sikorska
- Department of Biometrics, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Bart Reymen
- Department of Radiation Oncology (MAASTRO Clinic), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre, The Netherlands
| | - Wouter van Elmpt
- Department of Radiation Oncology (MAASTRO Clinic), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre, The Netherlands
| | - Gunnar Westman
- Department of Oncology, Rigshospitalet Copenhagen University Hospital, Denmark
| | | | - Edith Dieleman
- Department of Radiation Oncology, Academic Medical Center, Amsterdam, The Netherlands
| | | | - Corinne Faivre-Finn
- The University of Manchester, Division of Cancer Sciences, The Christie NHS Foundation Trust, United Kingdom
| | - José Belderbos
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
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Karlsson H, Fryknäs M, Strese S, Gullbo J, Westman G, Bremberg U, Sjöblom T, Pandzic T, Larsson R, Nygren P. Mechanistic characterization of a copper containing thiosemicarbazone with potent antitumor activity. Oncotarget 2018; 8:30217-30234. [PMID: 28415818 PMCID: PMC5444738 DOI: 10.18632/oncotarget.16324] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 03/08/2017] [Indexed: 01/05/2023] Open
Abstract
Background The thiosemicarbazone CD 02750 (VLX50) was recently reported as a hit compound in a phenotype-based drug screen in primary cultures of patient tumor cells. We synthesized a copper complex of VLX50, denoted VLX60, and characterized its antitumor and mechanistic properties. Materials and Methods The cytotoxic effects and mechanistic properties of VLX60 were investigated in monolayer cultures of multiple human cell lines, in tumor cells from patients, in a 3-D spheroid cell culture system and in vivo and were compared with those of VLX50. Results VLX60 showed ≥ 3-fold higher cytotoxic activity than VLX50 in 2-D cultures and, in contrast to VLX50, retained its activity in the presence of additional iron. VLX60 was effective against non-proliferative spheroids and against tumor xenografts in vivo in a murine model. In contrast to VLX50, gene expression analysis demonstrated that genes associated with oxidative stress were considerably enriched in cells exposed to VLX60 as was induction of reactive oxygen. VLX60 compromised the ubiquitin-proteasome system and was more active in BRAF mutated versus BRAF wild-type colon cancer cells. Conclusions The cytotoxic effects of the copper thiosemicarbazone VLX60 differ from those of VLX50 and shows interesting features as a potential antitumor drug, notably against BRAF mutated colorectal cancer.
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Affiliation(s)
| | - Mårten Fryknäs
- Department of Medical Sciences, Uppsala University, Sweden
| | - Sara Strese
- Department of Medical Sciences, Uppsala University, Sweden
| | - Joachim Gullbo
- Department of Medical Sciences, Uppsala University, Sweden.,Department of Immunology, Genetics and Pathology, Uppsala University, Sweden
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Ulf Bremberg
- Department of Medicinal Chemistry, Uppsala University, Sweden
| | - Tobias Sjöblom
- Department of Immunology, Genetics and Pathology, Uppsala University, Sweden
| | - Tatjana Pandzic
- Department of Immunology, Genetics and Pathology, Uppsala University, Sweden
| | - Rolf Larsson
- Department of Medical Sciences, Uppsala University, Sweden
| | - Peter Nygren
- Department of Immunology, Genetics and Pathology, Uppsala University, Sweden
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Börjesson M, Sahlin K, Bernin D, Westman G. Increased thermal stability of nanocellulose composites by functionalization of the sulfate groups on cellulose nanocrystals with azetidinium ions. J Appl Polym Sci 2017. [DOI: 10.1002/app.45963] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Mikaela Börjesson
- Department of Chemistry and Chemical Engineering; Chalmers University of Technology; Gothenburg SE-41296 Sweden
| | - Karin Sahlin
- Department of Chemistry and Chemical Engineering; Chalmers University of Technology; Gothenburg SE-41296 Sweden
- Wallenberg Wood Science Center (WWSC); Chalmers University of Technology; Gothenburg SE-41296 Sweden
| | - Diana Bernin
- Swedish NMR Centre; University of Gothenburg; Gothenburg SE-40530 Sweden
| | - Gunnar Westman
- Department of Chemistry and Chemical Engineering; Chalmers University of Technology; Gothenburg SE-41296 Sweden
- Wallenberg Wood Science Center (WWSC); Chalmers University of Technology; Gothenburg SE-41296 Sweden
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La Fontaine M, Vogel W, Persson G, Westman G, Reymen B, De Ruysscher D, Belderbos J, Sonke J. PO-0847: The dose-response curve of post-treatment FDG-uptake in lung tissue of irradiated NSCLC patients. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31284-7] [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: 10/19/2022]
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Krasnou I, Gårdebjer S, Tarasova E, Larsson A, Westman G, Krumme A. Permeability of water and oleic acid in composite films of phase separated polypropylene and cellulose stearate blends. Carbohydr Polym 2016; 152:450-458. [DOI: 10.1016/j.carbpol.2016.07.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/21/2016] [Accepted: 07/04/2016] [Indexed: 11/16/2022]
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Westman G, Studahl M, Ahlm C, Eriksson BM, Persson B, Rönnelid J, Schliamser S, Aurelius E. N-methyl-d-aspartate receptor autoimmunity affects cognitive performance in herpes simplex encephalitis. Clin Microbiol Infect 2016; 22:934-940. [PMID: 27497810 DOI: 10.1016/j.cmi.2016.07.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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: 05/16/2016] [Revised: 07/26/2016] [Accepted: 07/26/2016] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To investigate the prevalence and temporal development of N-methyl-d-aspartate receptor (NMDAR) autoantibodies in relation to neurocognitive performance in patients with herpes simplex encephalitis (HSE). METHODS This prospective observational study enrolled a total of 49 HSE patients within a randomized controlled trial of valacyclovir. Cerebrospinal fluid and serum samples were drawn in the initial stage of disease, after 2 to 3 weeks and after 3 months. Anti-NMDAR IgG was detected with HEK293 cells transfected with plasmids encoding the NMDA NR1 type glutamate receptor. A batch of neurocognitive tests, including the Mattis Dementia Rating Scale (MDRS), Glasgow Coma Scale (GCS), Reaction Level Scale (RLS85), Mini-Mental State Examination (MMSE) and National Institutes of Health (NIH) stroke scale, was performed during 24 months' follow-up. RESULTS Anti-NMDAR IgG was detected in 12 of 49 participants. None were antibody positive in the initial stage of disease. In ten of 12 positive cases, specific antibodies were detectable only after 3 months. Notably, the development of NMDAR autoantibodies was associated with significantly impaired recovery of neurocognitive performance. After 24 months' follow-up, the median increase in MDRS total score was 1.5 vs. 10 points in antibody-positive and -negative participants (p=0.018). CONCLUSIONS Anti-NMDAR autoimmunity is a common complication to HSE that develops within 3 months after onset of disease. The association to impaired neurocognitive recovery could have therapeutical implications, as central nervous system autoimmunity is potentially responsive to immunotherapy.
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Affiliation(s)
- G Westman
- Department of Medical Sciences, Section of Infectious Diseases, Uppsala University, Uppsala, Sweden.
| | - M Studahl
- Department of Infectious Diseases, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - C Ahlm
- Department of Clinical Microbiology, Infectious Diseases, Umeå University, Umeå, Sweden
| | - B M Eriksson
- Department of Medical Sciences, Section of Infectious Diseases, Uppsala University, Uppsala, Sweden
| | - B Persson
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - J Rönnelid
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - S Schliamser
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
| | - E Aurelius
- Unit of Infectious Diseases, Department of Medicine, Karolinska Institutet, Sweden
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Börjesson M, Westman G. Branching of hemicelluloses through an azetidinium salt ring-opening reaction. Carbohydr Res 2016; 428:23-30. [DOI: 10.1016/j.carres.2016.04.005] [Citation(s) in RCA: 10] [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] [Received: 01/19/2016] [Revised: 04/04/2016] [Accepted: 04/06/2016] [Indexed: 11/28/2022]
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Josipovic M, Persson GF, Dueck J, Bangsgaard JP, Westman G, Specht L, Aznar MC. Geometric uncertainties in voluntary deep inspiration breath hold radiotherapy for locally advanced lung cancer. Radiother Oncol 2016; 118:510-4. [PMID: 26631647 DOI: 10.1016/j.radonc.2015.11.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 11/03/2015] [Accepted: 11/08/2015] [Indexed: 12/16/2022]
Abstract
BACKGROUND AND PURPOSE Deep inspiration breath hold (DIBH) increases lung volume and can potentially reduce treatment-related toxicity in locally advanced lung cancer. We estimated geometric uncertainties in visually guided voluntary DIBH and derived the appropriate treatment margins for different image-guidance strategies. MATERIAL AND METHODS Seventeen patients were included prospectively. An optical marker-based respiratory monitoring with visual guidance enabled comfortable DIBHs, adjusted to each patient's performance. All patients had three consecutive DIBH CTs at each of the treatment fractions 2, 16 and 31. DIBH reproducibility was evaluated as inter- and intra-fractional variations in lung volume, tumour position and differential motion between primary tumour and mediastinal lymph nodes. RESULTS Lung volume increased by median 60% in DIBH. Inter- and intra-fractional lung volume variations were median 2.1% and 1.1%, respectively. Inter- and intra-fractional uncertainties in 3D tumour position were 4.8 ± 2.8 mm and 1.7 ± 1.4 mm (mean ± SD). Inter- and intra-fractional differential motion was 4.8 ± 3.3 mm and 0.0 ± 1.1 mm. CONCLUSIONS For single targets, visually guided voluntary DIBH radiotherapy is highly reproducible provided an image-guidance strategy with tumour registration is performed. If the primary tumour is separated from the mediastinal lymph nodes, inter-fractional differential motion remains a challenge and margins must be adapted to reflect the image registration strategy.
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Affiliation(s)
- Mirjana Josipovic
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark; Niels Bohr Institute, Faculty of Science, University of Copenhagen, Denmark.
| | - Gitte F Persson
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark
| | - Jenny Dueck
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark; Niels Bohr Institute, Faculty of Science, University of Copenhagen, Denmark; Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Jens Peter Bangsgaard
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark
| | - Gunnar Westman
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark
| | - Lena Specht
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark; Faculty of Medical Sciences, University of Copenhagen, Denmark
| | - Marianne C Aznar
- Department of Oncology, Section of Radiotherapy, Rigshospitalet, Copenhagen, Denmark; Niels Bohr Institute, Faculty of Science, University of Copenhagen, Denmark; Faculty of Medical Sciences, University of Copenhagen, Denmark
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Langholz JB, Westman G, Karlsteen M. Musculoskeletal Modelling in Sports - Evaluation of Different Software Tools with Focus on Swimming. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.proeng.2016.06.278] [Citation(s) in RCA: 7] [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] [Indexed: 10/21/2022]
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Van Diessen J, De Russcher D, Sonke J, Damen E, Sikorska K, Westman G, Reymen B, Belderbos J. OC-0204: The first toxicity results of the PET-boost trial (NCT01024829). Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40202-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Olsson C, Idström A, Nordstierna L, Westman G. Influence of water on swelling and dissolution of cellulose in 1-ethyl-3-methylimidazolium acetate. Carbohydr Polym 2014; 99:438-46. [DOI: 10.1016/j.carbpol.2013.08.042] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 07/17/2013] [Accepted: 08/18/2013] [Indexed: 11/16/2022]
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Josipovic M, Persson G, Westman G, Bangsgaard J, Specht L, Aznar M. PO-0931: Image quality and registration uncertainty in image guided deep inspiration breath hold radiotherapy of lung cancer. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31049-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Josipovic M, Persson GF, Håkansson K, Damkjær SMS, Bangsgaard JP, Westman G, Riisgaard S, Specht L, Aznar MC. Deep inspiration breath hold radiotherapy for locally advanced lung cancer: comparison of different treatment techniques on target coverage, lung dose and treatment delivery time. Acta Oncol 2013; 52:1582-6. [PMID: 24047341 DOI: 10.3109/0284186x.2013.813644] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Mirjana Josipovic
- Department of Radiation Oncology, Rigshospitalet , Copenhagen , Denmark
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Josipovic M, Persson G, Håkansson K, Damkjær S, Westman G, Bangsgaard J, Specht L, Aznar M. Deep Inspiration Breath-Hold Radiation Therapy for Advanced Stage Lung Cancer Is Feasible and Facilitates Lung Toxicity Reduction. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Fryknäs M, Gullbo J, Wang X, Rickardson L, Jarvius M, Wickström M, Hassan S, Andersson C, Gustafsson M, Westman G, Nygren P, Linder S, Larsson R. Screening for phenotype selective activity in multidrug resistant cells identifies a novel tubulin active agent insensitive to common forms of cancer drug resistance. BMC Cancer 2013; 13:374. [PMID: 23919498 PMCID: PMC3751689 DOI: 10.1186/1471-2407-13-374] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 07/24/2013] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Drug resistance is a common cause of treatment failure in cancer patients and encompasses a multitude of different mechanisms. The aim of the present study was to identify drugs effective on multidrug resistant cells. METHODS The RPMI 8226 myeloma cell line and its multidrug resistant subline 8226/Dox40 was screened for cytotoxicity in response to 3,000 chemically diverse compounds using a fluorometric cytotoxicity assay (FMCA). Follow-up profiling was subsequently performed using various cellular and biochemical assays. RESULTS One compound, designated VLX40, demonstrated a higher activity against 8226/Dox40 cells compared to its parental counterpart. VLX40 induced delayed cell death with apoptotic features. Mechanistic exploration was performed using gene expression analysis of drug exposed tumor cells to generate a drug-specific signature. Strong connections to tubulin inhibitors and microtubule cytoskeleton were retrieved. The mechanistic hypothesis of VLX40 acting as a tubulin inhibitor was confirmed by direct measurements of interaction with tubulin polymerization using a biochemical assay and supported by demonstration of G2/M cell cycle arrest. When tested against a broad panel of primary cultures of patient tumor cells (PCPTC) representing different forms of leukemia and solid tumors, VLX40 displayed high activity against both myeloid and lymphoid leukemias in contrast to the reference compound vincristine to which myeloid blast cells are often insensitive. Significant in vivo activity was confirmed in myeloid U-937 cells implanted subcutaneously in mice using the hollow fiber model. CONCLUSIONS The results indicate that VLX40 may be a useful prototype for development of novel tubulin active agents that are insensitive to common mechanisms of cancer drug resistance.
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Affiliation(s)
- Mårten Fryknäs
- Department of Medical Sciences, Division of Clinical Pharmacology, Uppsala University, Uppsala, Sweden
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Hasani M, Henniges U, Idström A, Nordstierna L, Westman G, Rosenau T, Potthast A. Nano-cellulosic materials: the impact of water on their dissolution in DMAc/LiCl. Carbohydr Polym 2013; 98:1565-72. [PMID: 24053841 DOI: 10.1016/j.carbpol.2013.07.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [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: 03/25/2013] [Revised: 06/08/2013] [Accepted: 07/03/2013] [Indexed: 11/29/2022]
Abstract
The dissolution behaviour of disassociated cellulosic materials in N,N-dimethylacetamide/lithium chloride (DMAc/LiCl) was investigated. The parameters monitored were chromatographic elution profiles and recovered mass by means of gel permeation chromatography (GPC) with RI detection. In order to elucidate the impact of the disassembly on cellulosic fibres, comparative studies were performed with the non-disassociated cellulose counterparts. The importance of the presence of water was addressed by Karl Fischer titration and solvent exchange experiments. Morphological changes during the dissolution process were studied by scanning electron microscopy (SEM). Dissolution of fibrillated cellulosic materials is impeded compared to the non-fibrillated material. This is a consequence of the high-surface-area fibrils prone to retain high amounts of water. Dissolution behaviour of nano-crystalline cellulosic materials appeared to be source-dependent. Due to the absence of entangled networks, these materials retain only water bound at the surface of the nano-crystallites, indicative of both the exposed surface area and solubility. The small cellulose nano-particles extracted from dissolving pulp show lower solubility compared to the large NCC particles from cotton.
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Affiliation(s)
- Merima Hasani
- Department of Chemical and Biological Engineering/Organic Chemistry, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
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Henniges U, Hasani M, Potthast A, Westman G, Rosenau T. Electron Beam Irradiation of Cellulosic Materials-Opportunities and Limitations. Materials (Basel) 2013; 6:1584-1598. [PMID: 28809230 PMCID: PMC5452524 DOI: 10.3390/ma6051584] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [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: 03/11/2013] [Revised: 04/08/2013] [Accepted: 04/17/2013] [Indexed: 11/30/2022]
Abstract
The irradiation of pulp is of interest from different perspectives. Mainly it is required when a modification of cellulose is needed. Irradiation could bring many advantages, such as chemical savings and, therefore, cost savings and a reduction in environmental pollutants. In this account, pulp and dissociated celluloses were analyzed before and after irradiation by electron beaming. The focus of the analysis was the oxidation of hydroxyl groups to carbonyl and carboxyl groups in pulp and the degradation of cellulose causing a decrease in molar mass. For that purpose, the samples were labeled with a selective fluorescence marker and analyzed by gel permeation chromatography (GPC) coupled with multi-angle laser light scattering (MALLS), refractive index (RI), and fluorescence detectors. Degradation of the analyzed substrates was the predominant result of the irradiation; however, in the microcrystalline samples, oxidized cellulose functionalities were introduced along the cellulose chain, making this substrate suitable for further chemical modification.
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Affiliation(s)
- Ute Henniges
- Department of Chemistry/Division of Chemistry of Renewables, University of Natural Resources and Life Sciences, Vienna A-1190, Austria.
| | - Merima Hasani
- Department of Chemical and Biological Engineering/Organic Chemistry, Chalmers University of Technology, Gothenburg SE-412 96, Sweden.
| | - Antje Potthast
- Department of Chemistry/Division of Chemistry of Renewables, University of Natural Resources and Life Sciences, Vienna A-1190, Austria.
| | - Gunnar Westman
- Department of Chemical and Biological Engineering/Organic Chemistry, Chalmers University of Technology, Gothenburg SE-412 96, Sweden.
| | - Thomas Rosenau
- Department of Chemistry/Division of Chemistry of Renewables, University of Natural Resources and Life Sciences, Vienna A-1190, Austria.
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Josipovic M, Damkjær S, Håkansson K, Aznar M, Bangsgaard J, Westman G, Fredberg Persson G. PO-0880: Voluntary deep inspiration breath hold for locally advanced lung cancer radiotherapy is feasible and reproducible. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33186-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Härdelin L, Thunberg J, Perzon E, Westman G, Walkenström P, Gatenholm P. Electrospinning of cellulose nanofibers from ionic liquids: The effect of different cosolvents. J Appl Polym Sci 2012. [DOI: 10.1002/app.36323] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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36
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Makhubela BCE, Jardine AM, Westman G, Smith GS. Hydroformylation of 1-octene using low-generation Rh(i) metallodendritic catalysts based on a tris-2-(2-pyridyliminoethyl)amine scaffold. Dalton Trans 2012; 41:10715-23. [DOI: 10.1039/c2dt30856h] [Citation(s) in RCA: 18] [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: 01/01/2023]
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de la Motte H, Hasani M, Brelid H, Westman G. Molecular characterization of hydrolyzed cationized nanocrystalline cellulose, cotton cellulose and softwood kraft pulp using high resolution 1D and 2D NMR. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.03.038] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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38
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Gullbo J, Fryknäs M, Rickardson L, Darcy P, Hägg M, Wickström M, Hassan S, Westman G, Brnjic S, Nygren P, Linder S, Larsson R. Phenotype-based drug screening in primary ovarian carcinoma cultures identifies intracellular iron depletion as a promising strategy for cancer treatment. Biochem Pharmacol 2011; 82:139-47. [PMID: 21531212 DOI: 10.1016/j.bcp.2011.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 04/07/2011] [Accepted: 04/14/2011] [Indexed: 01/07/2023]
Abstract
Primary cultures of patient tumor cells (PCPTC) have been used for prediction of diagnosis-specific activity and individual patient response to anticancer drugs, but have not been utilized as a model for identification of novel drugs in high throughput screening. In the present study, ovarian carcinoma cells from three patients were tested in response to a library of 3000 chemically diverse compounds. Eight hits were retrieved after counter screening using normal epithelial cells, and one of the two structurally related hit compounds was selected for further preclinical evaluation. This compound, designated VLX 50, demonstrated a broad spectrum of activity when tested in a panel of PCPTCs representing different forms of leukemia and solid tumors and displayed a high tumor to normal cell activity. VLX 50 induced delayed cell death with some features of classical apoptosis. Significant in vivo activity was confirmed on primary cultures of human ovarian carcinoma cells in mice using the hollow fiber model. Mechanistic exploration was performed using gene expression analysis of drug exposed tumor cells to generate a drug-specific signature. This query signature was analyzed using the Gene Set Enrichment Analysis and the Connectivity Map database. Strong connections to hypoxia inducible factor 1 and iron chelators were retrieved. The mechanistic hypothesis of intracellular iron depletion leading to hypoxia signaling was confirmed by a series of experiments. The results indicate the feasibility of using PCPTC for cancer drug screening and that intracellular iron depletion could be a potentially important strategy for cancer therapy.
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Affiliation(s)
- Joachim Gullbo
- Department of Medical Sciences, Division of Clinical Pharmacology, Uppsala University Hospital, Sweden
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Samuelsson K, Bergström MA, Jonsson CA, Westman G, Karlberg AT. Diphenylthiourea, a common rubber chemical, is bioactivated to potent skin sensitizers. Chem Res Toxicol 2010; 24:35-44. [PMID: 21073181 DOI: 10.1021/tx100241z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Diphenylthiourea (DPTU) is a known skin sensitizer commonly used as a vulcanization accelerator in the production of synthetic rubber, for example, neoprene. The versatile usage of neoprene is due to the multifaceted properties of the material; for example, it is stretchable, waterproof, and chemical- and abrasion-resistant. The wide application of neoprene has resulted in numerous case reports of dermatitis patients allergic to DPTU. The mechanism by which DPTU works as a contact allergen has not been described; thus, the aim of the present study was to investigate if DPTU is a prohapten that can be activated by skin metabolism. The metabolic activation and covalent binding of (14)C-labeled DPTU to proteins were tested using a skinlike cytochrome P450 (P450) cocktail containing the five most abundant P450s found in human skin (CYP1A1, 1B1, 2B6, 2E1, and 3A5) and human liver microsomes. The incubations were carried out in the presence or absence of the metabolite trapping agents glutathione, methoxylamine, and benzylamine. The metabolism mixtures were analyzed by LC-radiochromatography, LC-MS, and LC-MS/MS. DPTU was mainly metabolically activated to reactive sulfoxides resulting in desulfurated adducts in both enzymatic systems used. Also, phenylisothiocyanate and phenylisocyanate were found to be metabolites of DPTU. The sensitizing capacity of the substrate (DPTU) and three metabolites was tested in the murine local lymph node assay. Two out of three metabolites tested were strong skin sensitizers, whereas DPTU itself, as previously known, was negative using this mouse model. In conclusion, DPTU forms highly reactive metabolites upon bioactivation by enzymes present in the skin. These metabolites are able to induce skin sensitization and are probable causes for DPTU allergy. To increase the possibilities of diagnosing contact allergy to DPTU-containing items, we suggest that suitable metabolites of DPTU should be used for screening testing.
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Affiliation(s)
- Kristin Samuelsson
- Dermatochemistry and Skin Allergy, Department of Chemistry, University of Gothenburg, Gothenburg, Sweden
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Köhnke T, Lund K, Brelid H, Westman G. Kraft pulp hornification: A closer look at the preventive effect gained by glucuronoxylan adsorption. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.02.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hasani M, Westman G, Potthast A, Rosenau T. Cationization of cellulose by usingN-oxiranylmethyl-N-methylmorpholinium chloride and 2-oxiranylpyridine as etherification agents. J Appl Polym Sci 2009. [DOI: 10.1002/app.30548] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Samuelsson K, Simonsson C, Jonsson CA, Westman G, Ericson MB, Karlberg AT. Accumulation of FITC nearstratum corneum-visualizing epidermal distribution of a strong sensitizer using two-photon microscopy. Contact Dermatitis 2009; 61:91-100. [DOI: 10.1111/j.1600-0536.2009.01591.x] [Citation(s) in RCA: 22] [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]
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Hranjec M, Starčević K, Piantanida I, Kralj M, Marjanović M, Hasani M, Westman G, Karminski-Zamola G. Synthesis, antitumor evaluation and DNA binding studies of novel amidino-benzimidazolyl substituted derivatives of furyl-phenyl- and thienyl-phenyl-acrylates, naphthofurans and naphthothiophenes. Eur J Med Chem 2008; 43:2877-90. [DOI: 10.1016/j.ejmech.2008.02.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 01/30/2008] [Accepted: 02/08/2008] [Indexed: 10/22/2022]
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Ishihara M, Kawase M, Westman G, Samuelsson K, Motohashi N, Sakagami H. Quantitative structure-cytotoxicity relationship analysis of phenoxazine derivatives by semiempirical molecular-orbital method. Anticancer Res 2007; 27:4053-4057. [PMID: 18225570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A semiempirical molecular-orbital method (CAChe) was applied to delineate the relationship between the cytotoxicity (evaluated by 50% cytotoxic concentration, CC50) of fifteen phenoxazine derivatives and eleven physical parameters (descriptors). Most of the phenoxazine derivatives had extended and planar structure. The cytotoxic activity of phenoxazines against the human oral squamous cell carcinoma HSC-2 and HSC-4 cells correlated to electron affinity, absolute hardness (eta), absolute electron negativity (chi) and octanol-water distribution coefficient (log-P). However, only log-P was correlated to CC50 in the HSC-3 cells, whereas only heat of formation and log-P were correlated to CC50 in the human promyelocytic leukemia HL-60 cells. The cytotoxic activity of the phenoxazine derivatives became maximum at the log-P = 5.9. Their cytotoxicity strongly depended on the chi value, but not on the eta value. Compounds with relatively higher cytotoxicity showed higher chi value (chi > 5.28), whereas compounds with relatively lower cytotoxicity showed lower chi value (chi < 4.27). These data suggest that appropriate chemical descriptors should be selected to estimate the cytotoxicity of phenoxazines, depending on the target cells.
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Affiliation(s)
- Mariko Ishihara
- Division of Basic Chemistry, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Saitama 350-0283, Japan.
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Suzuki F, Hashimoto K, Ishihara M, Westman G, Samuelsson K, Kawase M, Motohashi N, Sakagami H. Tumor-specificity and type of cell death induced by phenoxazines. Anticancer Res 2007; 27:4233-4238. [PMID: 18225595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Phenoxazines have shown diverse biological activities, but tumor-specific cytotoxic activity has not been investigated. A total of 24 phenoxazine derivatives (WM1-24) was investigated for their relative cytotoxicity against human tumor cell lines vs. normal cells. WM7 and WM8 showed the highest tumor-specificity index of 4.3 and 4.8, respectively. Considerable difference in drug-sensitivity was found among these tumor cell lines. Human promyelocytic leukemia HL-60 cells showed the highest sensitivity to both WM7 and WM8, followed by human oral squamous cell carcinoma (HSC-2, HSC-3, HSC-4), and human gingival fibroblast (HGF), pulp cell (HPC) and periodontal ligament fibroblast (HPLF) were the most resistant. WM7 and WM8 induced little or no internucleosomal DNA fragmentation, and activated caspase-3 in HSC-2, HSC-4 and human glioblastoma T98G cells. These compounds failed to induce autophagic cell death, as judged by acridine orange and microtubule-associated protein 1 light chain 3 (LC3)-GFP assays. These results suggested that the higher cytotoxicity of WM7 and WM8 are derived from the positively-charged quaternary nitrogen substituents on the phenoxazine ring and the electron density of nitrogen at N12, and that inhibition of autophagy is not always coupled with apoptosis induction.
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Affiliation(s)
- Fumika Suzuki
- Division of Pharmacology, Meikai University School of Dentistry, Sakado, Saitama 350-0283, Japan
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Eriksson M, Westerlund F, Mehmedovic M, Lincoln P, Westman G, Larsson A, Akerman B. Comparing mono- and divalent DNA groove binding cyanine dyes—Binding geometries, dissociation rates, and fluorescence properties. Biophys Chem 2006; 122:195-205. [PMID: 16624475 DOI: 10.1016/j.bpc.2006.03.009] [Citation(s) in RCA: 7] [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] [Received: 01/27/2006] [Revised: 03/16/2006] [Accepted: 03/19/2006] [Indexed: 11/17/2022]
Abstract
The unsymmetrical cyanine dyes BOXTO-PRO and BOXTO-MEE were derived from the DNA groove binder BOXTO, by adding a positively charged or a non-ionic hydrophilic tail to BOXTO, respectively. The main objective was to obtain more efficient DNA probes, for instance in electrophoresis and microscopy, by slowing down the dissociation of BOXTO from DNA. The interactions with mixed sequence DNA was studied with fluorescence and absorbance spectroscopy, stopped-flow dissociation and gel electrophoresis. Both the derivatives are groove bound as BOXTO, and have similar fluorescence properties when bound to mixed sequence DNA in free solution. BOXTO-PRO exhibits a slower dissociation than BOXTO from DNA, whereas the dissociation rate for BOXTO-MEE is faster and, unexpectedly independent of the ionic strength. During gel electrophoresis both BOXTO-PRO and BOXTO-MEE exhibit a faster dissociation rate than BOXTO. Still, BOXTO-PRO seems to be a good alternative as DNA probe, especially for applications in free solution where the dissociation is slower than for the corresponding intercalator TOPRO-1.
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Affiliation(s)
- Maja Eriksson
- Department of Chemical and Biological Engineering, Chalmers University of Technology, S-412 96 Göteborg, Sweden.
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Wesolowska O, Molnar J, Westman G, Samuelsson K, Kawase M, Ocsovszki I, Motohashi N, Michalak K. Benzo[a]phenoxazines: a new group of potent P-glycoprotein inhibitors. In Vivo 2006; 20:109-13. [PMID: 16433037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The ability of fifteen novel phenoxazine derivatives (four phenoxazines and eleven benzo[a]phenoxazines) to modulate multidrug resistance (MDR) in a P-gp-overexpressing mouse T lymphoma cell line (L5178 MDR) was studied. A flow cytometric functional test, based on the differential accumulation of rhodamine 123 by sensitive and multidrug-resistant cells, was employed. Seven benzo[a]phenoxazines were observed to increase the amount of rhodamine 123 accumulated by resistant cells, i.e. to be new effective MDR modulators. The results allowed us to draw preliminary conclusions about the structural features of benzo[a]phenoxazines which are important for MDR modulation.
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Affiliation(s)
- Olga Wesolowska
- Department of Biophysics, Wroclaw Medical University, ul. Chalubinskiego 10, 50-368 Wroclaw, Poland.
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Abstract
BACKGROUND Sweden is the only country in which oral high dose vitamin B12 has gained widespread use in the treatment of deficiency states. OBJECTIVE The aim of the study was to describe prescribing patterns and sales statistics of vitamin B12 tablets and injections in Sweden 1990-2000.Design, setting, and sources: Official statistics of cobalamin prescriptions and sales were used. RESULTS The use of vitamin B12 increased in Sweden 1990-2000, mainly because of an increase in the use of oral high dose vitamin B12 therapy. The experience, in statistical terms a "total investigation", comprised 1,000,000 patient years for tablets and 750,000 patient years for injections. During 2000, 13% of residents aged 70 and over were treated with vitamin B12, two of three with the tablet preparation. Most patients in Sweden requiring vitamin B12 therapy have transferred from parenteral to oral high dose vitamin B12 since 1964, when the oral preparation was introduced. CONCLUSION The findings suggest that many patients in other post-industrial societies may also be suitable for oral vitamin B12 treatment.
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Affiliation(s)
- M Nilsson
- Department of Internal Medicine, University Hospital of Northern Sweden, SE-901 85 Umeå, Sweden
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Abstract
Intercalative binding of ligands to DNA can be demonstrated by helix unwinding, monitored by gel electrophoresis of supercoiled DNA, as electrophoretic mobility is sensitive to the topological DNA state. However, we show that an apparent lack of unwinding in an electrophoretic assay could be due to dissociation of the (intercalated) ligand during the analysis, rather than evidence for a nonintercalative mode of binding to DNA. Repetitive scanning during the electrophoresis ensures that release of the ligand during electrophoresis does not affect the measured degree of unwinding, based on the electrophoretic velocity being determined as a function of time. We use this assay to establish intercalation as a mode of binding to DNA for the cyanine dyes YO, YO-PRO as well as two enantiomeric forms of the ruthenium complexes [(phen)2 Ru(tatpp)Ru(phen)2]4+, and to support groove-binding for the new unsymmetrical cyanine dyes BOXTO and BOXTO-PRO. Groove-binding could be concluded from a lack of unwinding, because we could rule out that it is caused by release of the dye during the electrophoresis. The gel electrophoresis has the advantage over hydrodynamic techniques that much smaller sample amounts are required, and our time-resolved approach can be employed in all mobility-shift assays when applied to dissociating complexes.
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Affiliation(s)
- Maja Eriksson
- Department of Chemistry and Bioscience, Chalmers University of Technology, Göteborg, Sweden
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Karlsson HJ, Bergqvist MH, Lincoln P, Westman G. Syntheses and DNA-binding studies of a series of unsymmetrical cyanine dyes: structural influence on the degree of minor groove binding to natural DNA. Bioorg Med Chem 2004; 12:2369-84. [PMID: 15080934 DOI: 10.1016/j.bmc.2004.02.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2003] [Accepted: 02/03/2004] [Indexed: 11/28/2022]
Abstract
Twelve crescent-shaped unsymmetrical dyes have been synthesized and their interactions with DNA have been investigated by spectroscopic methods. A new facile synthetic route to this type of cyanine dyes has been developed, involving the preparation of 6-substituted 2-thiomethyl-benzothiazoles in good yields. The new dyes are analogues to the minor groove binding unsymmetrical cyanine dye, BEBO, recently reported by us. In this dye, the structure of the known intercalating cyanine dye BO was extended with a 6-methylbenzothiazole substituent. Herein we further investigate the role of the extending benzazole heterocycle, as well as of the pyridine or quinoline moiety of the cyanine chromophore, for the binding mode of these crescent-shaped dyes to calf thymus DNA. Flow LD and CD studies of the 12 dyes show that the extent of minor groove binding to mixed sequence DNA varies significantly between the dyes. We find that hydrophobicity and size are the crucial parameters for recognition of the minor groove. The relatively high fluorescence quantum yield of many of these cyanines bound to DNA, combined with their absorption at long wavelengths, may render them useful in biological applications. In particular, two of the benzoxazole containing dyes BOXTO and 2-BOXTO show a high degree of minor groove binding and quantum yields of 0.52 and 0.32, respectively, when bound to DNA.
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Affiliation(s)
- H Jonas Karlsson
- Department of Chemistry and Bioscience, Chalmers University of Technology, S-412 96 Gothenburg, Sweden.
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